6292 lines
224 KiB
C++
6292 lines
224 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2014 Daniel Marjamäki and Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "preprocessor.h"
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#include "tokenize.h"
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#include "symboldatabase.h"
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#include "checkother.h"
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#include "testsuite.h"
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#include "testutils.h"
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#include <sstream>
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#include <tinyxml2.h>
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extern std::ostringstream errout;
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class TestOther : public TestFixture {
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public:
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TestOther() : TestFixture("TestOther") {
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}
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private:
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Settings settings_std;
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void run() {
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LOAD_LIB_2(settings_std.library, "std.cfg");
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TEST_CASE(emptyBrackets);
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TEST_CASE(zeroDiv1);
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TEST_CASE(zeroDiv2);
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TEST_CASE(zeroDiv3);
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TEST_CASE(zeroDiv4);
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TEST_CASE(zeroDiv5);
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TEST_CASE(zeroDiv6);
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TEST_CASE(zeroDiv7); // #4930
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TEST_CASE(zeroDiv8);
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TEST_CASE(zeroDivCond); // division by zero / useless condition
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TEST_CASE(nanInArithmeticExpression);
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TEST_CASE(invalidFunctionUsage1);
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TEST_CASE(varScope1);
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TEST_CASE(varScope2);
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TEST_CASE(varScope3);
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TEST_CASE(varScope4);
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TEST_CASE(varScope5);
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TEST_CASE(varScope6);
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TEST_CASE(varScope7);
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TEST_CASE(varScope8);
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TEST_CASE(varScope9); // classes may have extra side-effects
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TEST_CASE(varScope10); // Undefined macro FOR
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TEST_CASE(varScope11); // #2475 - struct initialization is not inner scope
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TEST_CASE(varScope12);
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TEST_CASE(varScope13); // variable usage in inner loop
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TEST_CASE(varScope14);
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TEST_CASE(varScope15); // #4573 if-else-if
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TEST_CASE(varScope16);
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TEST_CASE(varScope17);
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TEST_CASE(varScope18);
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TEST_CASE(varScope19); // Ticket #4994
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TEST_CASE(varScope20); // Ticket #5103
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TEST_CASE(varScope21); // Ticket #5382
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TEST_CASE(varScope22); // Ticket #5684
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TEST_CASE(varScope23); // Ticket #6154
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TEST_CASE(oldStylePointerCast);
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TEST_CASE(invalidPointerCast);
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TEST_CASE(passedByValue);
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TEST_CASE(mathfunctionCall_fmod);
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TEST_CASE(mathfunctionCall_sqrt);
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TEST_CASE(mathfunctionCall_log);
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TEST_CASE(mathfunctionCall_acos);
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TEST_CASE(mathfunctionCall_asin);
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TEST_CASE(mathfunctionCall_pow);
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TEST_CASE(mathfunctionCall_atan2);
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TEST_CASE(mathfunctionCall_precision);
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TEST_CASE(switchRedundantAssignmentTest);
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TEST_CASE(switchRedundantOperationTest);
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TEST_CASE(switchRedundantBitwiseOperationTest);
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TEST_CASE(switchFallThroughCase);
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TEST_CASE(unreachableCode);
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TEST_CASE(suspiciousCase);
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TEST_CASE(suspiciousEqualityComparison);
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TEST_CASE(selfAssignment);
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TEST_CASE(trac1132);
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TEST_CASE(testMisusedScopeObjectDoesNotPickFunction1);
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TEST_CASE(testMisusedScopeObjectDoesNotPickFunction2);
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TEST_CASE(testMisusedScopeObjectPicksClass);
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TEST_CASE(testMisusedScopeObjectPicksStruct);
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TEST_CASE(testMisusedScopeObjectDoesNotPickIf);
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TEST_CASE(testMisusedScopeObjectDoesNotPickConstructorDeclaration);
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TEST_CASE(testMisusedScopeObjectDoesNotPickFunctor);
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TEST_CASE(testMisusedScopeObjectDoesNotPickLocalClassConstructors);
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TEST_CASE(testMisusedScopeObjectDoesNotPickUsedObject);
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TEST_CASE(testMisusedScopeObjectDoesNotPickPureC);
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TEST_CASE(testMisusedScopeObjectDoesNotPickNestedClass);
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TEST_CASE(testMisusedScopeObjectInConstructor);
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TEST_CASE(testMisusedScopeObjectNoCodeAfter);
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TEST_CASE(trac2071);
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TEST_CASE(trac2084);
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TEST_CASE(trac3693);
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TEST_CASE(memsetZeroBytes);
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TEST_CASE(memsetInvalid2ndParam);
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TEST_CASE(redundantGetAndSetUserId);
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TEST_CASE(clarifyCalculation);
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TEST_CASE(clarifyStatement);
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TEST_CASE(duplicateBranch);
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TEST_CASE(duplicateBranch1); // tests extracted by http://www.viva64.com/en/b/0149/ ( Comparison between PVS-Studio and cppcheck ): Errors detected in Quake 3: Arena by PVS-Studio: Fragement 2
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TEST_CASE(duplicateBranch2); // empty macro
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TEST_CASE(duplicateExpression1);
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TEST_CASE(duplicateExpression2); // ticket #2730
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TEST_CASE(duplicateExpression3); // ticket #3317
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TEST_CASE(duplicateExpression4); // ticket #3354 (++)
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TEST_CASE(duplicateExpression5); // ticket #3749 (macros with same values)
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TEST_CASE(duplicateExpression6); // ticket #4639
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TEST_CASE(checkSignOfUnsignedVariable);
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TEST_CASE(checkSignOfPointer);
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TEST_CASE(checkForSuspiciousSemicolon1);
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TEST_CASE(checkForSuspiciousSemicolon2);
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TEST_CASE(checkDoubleFree);
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TEST_CASE(checkInvalidFree);
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TEST_CASE(checkRedundantCopy);
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TEST_CASE(checkNegativeShift);
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TEST_CASE(incompleteArrayFill);
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TEST_CASE(redundantVarAssignment);
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TEST_CASE(redundantMemWrite);
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TEST_CASE(varFuncNullUB);
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TEST_CASE(checkPipeParameterSize); // ticket #3521
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TEST_CASE(checkCastIntToCharAndBack); // ticket #160
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TEST_CASE(checkSleepTimeIntervall)
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TEST_CASE(checkCommaSeparatedReturn);
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TEST_CASE(checkComparisonFunctionIsAlwaysTrueOrFalse);
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TEST_CASE(integerOverflow); // #5895
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TEST_CASE(testReturnIgnoredReturnValue);
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}
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void check(const char code[], const char *filename = nullptr, bool experimental = false, bool inconclusive = true, bool posix = false, bool runSimpleChecks=true, Settings* settings = 0) {
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// Clear the error buffer..
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errout.str("");
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if (!settings) {
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static Settings _settings;
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settings = &_settings;
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}
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settings->addEnabled("style");
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settings->addEnabled("warning");
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settings->addEnabled("portability");
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settings->addEnabled("performance");
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settings->inconclusive = inconclusive;
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settings->experimental = experimental;
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settings->standards.posix = posix;
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if (posix) {
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const char cfg[] = "<?xml version=\"1.0\"?>\n"
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"<def>\n"
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" <function name=\"usleep\"> <arg nr=\"1\"><valid>0:999999</valid></arg> </function>\n"
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"</def>";
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tinyxml2::XMLDocument xmldoc;
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xmldoc.Parse(cfg, sizeof(cfg));
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settings->library.load(xmldoc);
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}
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// Tokenize..
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Tokenizer tokenizer(settings, this);
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std::istringstream istr(code);
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tokenizer.tokenize(istr, filename ? filename : "test.cpp");
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// Check..
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CheckOther checkOther(&tokenizer, settings, this);
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checkOther.runChecks(&tokenizer, settings, this);
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if (runSimpleChecks) {
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const std::string str1(tokenizer.tokens()->stringifyList(0,true));
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tokenizer.simplifyTokenList2();
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const std::string str2(tokenizer.tokens()->stringifyList(0,true));
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if (str1 != str2)
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warnUnsimplified(str1, str2);
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checkOther.runSimplifiedChecks(&tokenizer, settings, this);
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}
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}
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void check_preprocess_suppress(const char precode[], const char *filename = nullptr) {
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// Clear the error buffer..
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errout.str("");
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if (filename == nullptr)
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filename = "test.cpp";
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Settings settings;
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settings.addEnabled("warning");
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settings.addEnabled("style");
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settings.addEnabled("performance");
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settings.experimental = true;
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// Preprocess file..
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SimpleSuppressor logger(settings, this);
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Preprocessor preprocessor(&settings, &logger);
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std::list<std::string> configurations;
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std::string filedata = "";
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std::istringstream fin(precode);
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preprocessor.preprocess(fin, filedata, configurations, filename, settings._includePaths);
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const std::string code = preprocessor.getcode(filedata, "", filename);
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// Tokenize..
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Tokenizer tokenizer(&settings, &logger);
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std::istringstream istr(code);
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tokenizer.tokenize(istr, filename);
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// Check..
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CheckOther checkOther(&tokenizer, &settings, &logger);
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checkOther.checkSwitchCaseFallThrough();
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logger.reportUnmatchedSuppressions(settings.nomsg.getUnmatchedLocalSuppressions(filename, false));
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}
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void emptyBrackets() {
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check("{\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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}
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void zeroDiv1() {
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check("void foo() {\n"
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" cout << 1. / 0;\n"
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"}");
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ASSERT_EQUALS("[test.cpp:2]: (error) Division by zero.\n", errout.str());
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}
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void zeroDiv2() {
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check("void foo()\n"
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"{\n"
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" int sum = 0;\n"
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" for(int i = 0; i < n; i ++)\n"
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" {\n"
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" sum += i;\n"
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" }\n"
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" cout<<b/sum;\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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}
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void zeroDiv3() {
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check("void f()\n"
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"{\n"
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" div_t divresult = div (1,0);\n"
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"}");
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ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
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// #4929 - if there is a user function with the name "div" don't warn
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check("void div(int a, int b);\n"
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"void f() {\n"
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" div (1,0);\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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}
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void zeroDiv4() {
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check("void f()\n"
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"{\n"
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" long a = b / 0x6;\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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check("void f()\n"
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"{\n"
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" long a = b / 0x0;\n"
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"}");
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ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
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check("void f()\n"
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"{\n"
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" long a = b / 0L;\n"
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"}");
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ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
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check("void f()\n"
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"{\n"
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" long a = b / 0ul;\n"
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"}");
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ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
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check("void f()\n"
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"{\n"
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" div_t divresult = div (1,0L);\n"
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"}");
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ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
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check("void f()\n"
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"{\n"
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" div_t divresult = div (1,0x5);\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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// Don't warn about floating points (gcc doesn't warn either)
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// and floating points are handled differently than integers.
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check("void f()\n"
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"{\n"
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" long a = b / 0.0;\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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check("void f()\n"
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"{\n"
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" long a = b / 0.5;\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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// Don't warn about 0.0
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check("void f()\n"
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"{\n"
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" div_t divresult = div (1,0.0);\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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check("void f()\n"
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"{\n"
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" div_t divresult = div (1,0.5);\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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}
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void zeroDiv5() {
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check("void f()\n"
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"{ { {\n"
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" long a = b / 0;\n"
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"} } }");
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ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
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}
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void zeroDiv6() {
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check("void f()\n"
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"{ { {\n"
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" int a = b % 0;\n"
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"} } }");
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ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
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}
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void zeroDiv7() {
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check("void f() {\n"
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" int a = x/2*3/0;\n"
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" int b = y/2*3%0;\n"
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"}");
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ASSERT_EQUALS("[test.cpp:2]: (error) Division by zero.\n"
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"[test.cpp:3]: (error) Division by zero.\n", errout.str());
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}
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void zeroDiv8() {
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// #5584 - FP when function is unknown
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check("void f() {\n"
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" int a = 0;\n"
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" do_something(a);\n"
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" return 4 / a;\n"
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"}");
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ASSERT_EQUALS("[test.cpp:4]: (error, inconclusive) Division by zero.\n", errout.str());
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}
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void zeroDivCond() {
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check("void f(unsigned int x) {\n"
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" int y = 17 / x;\n"
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" if (x > 0) {}\n"
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"}");
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ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:2]: (warning) Either the condition 'x>0' is useless or there is division by zero at line 2.\n", errout.str());
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check("void f(unsigned int x) {\n"
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" int y = 17 / x;\n"
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" if (x >= 1) {}\n"
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"}");
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ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:2]: (warning) Either the condition 'x>=1' is useless or there is division by zero at line 2.\n", errout.str());
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check("void f(int x) {\n"
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" int y = 17 / x;\n"
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" if (x == 0) {}\n"
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"}");
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ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:2]: (warning) Either the condition 'x==0' is useless or there is division by zero at line 2.\n", errout.str());
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check("void f(unsigned int x) {\n"
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" int y = 17 / x;\n"
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" if (x != 0) {}\n"
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"}");
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ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:2]: (warning) Either the condition 'x!=0' is useless or there is division by zero at line 2.\n", errout.str());
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// function call
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check("void f1(int x, int y) { c=x/y; }\n"
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"void f2(unsigned int y) {\n"
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" f1(123,y);\n"
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" if (y>0){}\n"
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"}");
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ASSERT_EQUALS("[test.cpp:4] -> [test.cpp:1]: (warning) Either the condition 'y>0' is useless or there is division by zero at line 1.\n", errout.str());
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// avoid false positives when variable is changed after division
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check("void f() {\n"
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" unsigned int x = do_something();\n"
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" int y = 17 / x;\n"
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" x = some+calculation;\n"
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" if (x != 0) {}\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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{
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// function is called that might modify global variable
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check("void do_something();\n"
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"int x;\n"
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"void f() {\n"
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" int y = 17 / x;\n"
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" do_something();\n"
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" if (x != 0) {}\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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// function is called. but don't care, variable is local
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check("void do_something();\n"
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"void f() {\n"
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" int x = some + calculation;\n"
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" int y = 17 / x;\n"
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" do_something();\n"
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" if (x != 0) {}\n"
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"}");
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ASSERT_EQUALS("[test.cpp:6] -> [test.cpp:4]: (warning) Either the condition 'x!=0' is useless or there is division by zero at line 4.\n", errout.str());
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}
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check("void do_something(int value);\n"
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"void f(int x) {\n"
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" int y = 17 / x;\n"
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" do_something(x);\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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check("int x;\n"
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"void f() {\n"
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" int y = 17 / x;\n"
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" while (y || x == 0) { x--; }\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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// ticket 5033 segmentation fault (valid code) in CheckOther::checkZeroDivisionOrUselessCondition
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check("void f() {\n"
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"double* p1= new double[1];\n"
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"double* p2= new double[1];\n"
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"double* p3= new double[1];\n"
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"double* pp[3] = {p1,p2,p3};\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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// #5105 - FP
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check("int f(int a, int b) {\n"
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" int r = a / b;\n"
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" if (func(b)) {}\n"
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"}");
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ASSERT_EQUALS("", errout.str());
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// ?:
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check("int f(int d) {\n"
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" int r = (a?b:c) / d;\n"
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" if (d == 0) {}\n"
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"}");
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ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:2]: (warning) Either the condition 'd==0' is useless or there is division by zero at line 2.\n", errout.str());
|
|
|
|
check("int f(int a) {\n"
|
|
" int r = a ? 1 / a : 0;\n"
|
|
" if (a == 0) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int f(int a) {\n"
|
|
" int r = (a == 0) ? 0 : 1 / a;\n"
|
|
" if (a == 0) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void nanInArithmeticExpression() {
|
|
check("void f()\n"
|
|
"{\n"
|
|
" double x = 3.0 / 0.0 + 1.0\n"
|
|
" printf(\"%f\n\", x);\n"
|
|
"}");
|
|
ASSERT_EQUALS(
|
|
"[test.cpp:3]: (style) Using NaN/Inf in a computation.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" double x = 3.0 / 0.0 - 1.0\n"
|
|
" printf(\"%f\n\", x);\n"
|
|
"}");
|
|
ASSERT_EQUALS(
|
|
"[test.cpp:3]: (style) Using NaN/Inf in a computation.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" double x = 1.0 + 3.0 / 0.0\n"
|
|
" printf(\"%f\n\", x);\n"
|
|
"}");
|
|
ASSERT_EQUALS(
|
|
"[test.cpp:3]: (style) Using NaN/Inf in a computation.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" double x = 1.0 - 3.0 / 0.0\n"
|
|
" printf(\"%f\n\", x);\n"
|
|
"}");
|
|
ASSERT_EQUALS(
|
|
"[test.cpp:3]: (style) Using NaN/Inf in a computation.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" double x = 3.0 / 0.0\n"
|
|
" printf(\"%f\n\", x);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
}
|
|
|
|
void invalidFunctionUsage(const char code[]) {
|
|
// Clear the error buffer..
|
|
errout.str("");
|
|
|
|
const char cfg[] = "<?xml version=\"1.0\"?>\n"
|
|
"<def>\n"
|
|
" <function name=\"memset\"> <arg nr=\"3\"><not-bool/></arg> </function>\n"
|
|
" <function name=\"strtol\"> <arg nr=\"3\"><valid>0,2:36</valid></arg> </function>\n"
|
|
"</def>";
|
|
tinyxml2::XMLDocument xmldoc;
|
|
xmldoc.Parse(cfg, sizeof(cfg));
|
|
|
|
Settings settings;
|
|
settings.library.load(xmldoc);
|
|
|
|
// Tokenize..
|
|
Tokenizer tokenizer(&settings, this);
|
|
std::istringstream istr(code);
|
|
tokenizer.tokenize(istr, "test.cpp");
|
|
|
|
// Check for redundant code..
|
|
CheckOther checkOther(&tokenizer, &settings, this);
|
|
checkOther.invalidFunctionUsage();
|
|
}
|
|
|
|
void invalidFunctionUsage1() {
|
|
invalidFunctionUsage("int f() { memset(a,b,sizeof(a)!=12); }");
|
|
ASSERT_EQUALS("[test.cpp:1]: (error) Invalid memset() argument nr 3. A non-boolean value is required.\n", errout.str());
|
|
|
|
invalidFunctionUsage("int f() { memset(a,b,sizeof(a)!=0); }");
|
|
TODO_ASSERT_EQUALS("error", "", errout.str());
|
|
|
|
invalidFunctionUsage("int f() { strtol(a,b,sizeof(a)!=12); }");
|
|
ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strtol() argument nr 3. The value is 0 or 1 (comparison result) but the valid values are '0,2:36'.\n", errout.str());
|
|
|
|
invalidFunctionUsage("int f() { strtol(a,b,1); }");
|
|
ASSERT_EQUALS("[test.cpp:1]: (error) Invalid strtol() argument nr 3. The value is 1 but the valid values are '0,2:36'.\n", errout.str());
|
|
|
|
invalidFunctionUsage("int f() { strtol(a,b,10); }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope(const char code[]) {
|
|
// Clear the error buffer..
|
|
errout.str("");
|
|
|
|
Settings settings;
|
|
settings.addEnabled("style");
|
|
|
|
// Tokenize..
|
|
Tokenizer tokenizer(&settings, this);
|
|
std::istringstream istr(code);
|
|
tokenizer.tokenize(istr, "test.cpp");
|
|
|
|
// Check for redundant code..
|
|
CheckOther checkOther(&tokenizer, &settings, this);
|
|
checkOther.checkVariableScope();
|
|
}
|
|
|
|
void varScope1() {
|
|
varScope("unsigned short foo()\n"
|
|
"{\n"
|
|
" test_client CClient;\n"
|
|
" try\n"
|
|
" {\n"
|
|
" if (CClient.Open())\n"
|
|
" {\n"
|
|
" return 0;\n"
|
|
" }\n"
|
|
" }\n"
|
|
" catch (...)\n"
|
|
" {\n"
|
|
" return 2;\n"
|
|
" }\n"
|
|
"\n"
|
|
" try\n"
|
|
" {\n"
|
|
" CClient.Close();\n"
|
|
" }\n"
|
|
" catch (...)\n"
|
|
" {\n"
|
|
" return 2;\n"
|
|
" }\n"
|
|
"\n"
|
|
" return 1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope2() {
|
|
varScope("int foo()\n"
|
|
"{\n"
|
|
" Error e;\n"
|
|
" e.SetValue(12);\n"
|
|
" throw e;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope3() {
|
|
varScope("void foo()\n"
|
|
"{\n"
|
|
" int i;\n"
|
|
" int *p = 0;\n"
|
|
" if (abc)\n"
|
|
" {\n"
|
|
" p = &i;\n"
|
|
" }\n"
|
|
" *p = 1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope4() {
|
|
varScope("void foo()\n"
|
|
"{\n"
|
|
" int i;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope5() {
|
|
varScope("void f(int x)\n"
|
|
"{\n"
|
|
" int i = 0;\n"
|
|
" if (x) {\n"
|
|
" for ( ; i < 10; ++i) ;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) The scope of the variable 'i' can be reduced.\n", errout.str());
|
|
|
|
varScope("void f(int x) {\n"
|
|
" const unsigned char i = 0;\n"
|
|
" if (x) {\n"
|
|
" for ( ; i < 10; ++i) ;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("void f(int x)\n"
|
|
"{\n"
|
|
" int i = 0;\n"
|
|
" if (x) {b()}\n"
|
|
" else {\n"
|
|
" for ( ; i < 10; ++i) ;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) The scope of the variable 'i' can be reduced.\n", errout.str());
|
|
}
|
|
|
|
void varScope6() {
|
|
varScope("void f(int x)\n"
|
|
"{\n"
|
|
" int i = x;\n"
|
|
" if (a) {\n"
|
|
" x++;\n"
|
|
" }\n"
|
|
" if (b) {\n"
|
|
" c(i);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("void f()\n"
|
|
"{\n"
|
|
"int foo = 0;\n"
|
|
"std::vector<int> vec(10);\n"
|
|
"BOOST_FOREACH(int& i, vec)\n"
|
|
"{\n"
|
|
" foo += 1;\n"
|
|
" if(foo == 10)\n"
|
|
" {\n"
|
|
" return 0;\n"
|
|
" }\n"
|
|
"}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("void f(int &x)\n"
|
|
"{\n"
|
|
" int n = 1;\n"
|
|
" do\n"
|
|
" {\n"
|
|
" ++n;\n"
|
|
" ++x;\n"
|
|
" } while (x);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope7() {
|
|
varScope("void f(int x)\n"
|
|
"{\n"
|
|
" int y = 0;\n"
|
|
" b(y);\n"
|
|
" if (x) {\n"
|
|
" y++;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope8() {
|
|
varScope("void test() {\n"
|
|
" float edgeResistance=1;\n"
|
|
" std::vector<int> edges;\n"
|
|
" BOOST_FOREACH(int edge, edges) {\n"
|
|
" edgeResistance = (edge+1) / 2.0;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'edgeResistance' can be reduced.\n", errout.str());
|
|
}
|
|
|
|
void varScope9() {
|
|
// classes may have extra side effects
|
|
varScope("class fred {\n"
|
|
"public:\n"
|
|
" void x();\n"
|
|
"};\n"
|
|
"void test(int a) {\n"
|
|
" fred f;\n"
|
|
" if (a == 2) {\n"
|
|
" f.x();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope10() {
|
|
varScope("int f()\n"
|
|
"{\n"
|
|
" int x = 0;\n"
|
|
" FOR {\n"
|
|
" foo(x++);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope11() {
|
|
varScope("int f() {\n"
|
|
" int x = 0;\n"
|
|
" AB ab = { x, 0 };\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("int f() {\n"
|
|
" int x = 0;\n"
|
|
" if (a == 0) { ++x; }\n"
|
|
" AB ab = { x, 0 };\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("int f() {\n"
|
|
" int x = 0;\n"
|
|
" if (a == 0) { ++x; }\n"
|
|
" if (a == 1) { AB ab = { x, 0 }; }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope12() {
|
|
varScope("void f(int x) {\n"
|
|
" int i[5];\n"
|
|
" int* j = y;\n"
|
|
" if (x)\n"
|
|
" foo(i);\n"
|
|
" foo(j);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'i' can be reduced.\n", errout.str());
|
|
|
|
varScope("void f(int x) {\n"
|
|
" int i[5];\n"
|
|
" int* j;\n"
|
|
" if (x)\n"
|
|
" j = i;\n"
|
|
" foo(j);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("void f(int x) {\n"
|
|
" const bool b = true;\n"
|
|
" x++;\n"
|
|
" if (x == 5)\n"
|
|
" foo(b);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("void f(int x) {\n"
|
|
" const bool b = x;\n"
|
|
" x++;\n"
|
|
" if (x == 5)\n"
|
|
" foo(b);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope13() {
|
|
// #2770
|
|
varScope("void f() {\n"
|
|
" int i = 0;\n"
|
|
" forever {\n"
|
|
" if (i++ == 42) { break; }\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope14() {
|
|
// #3941
|
|
varScope("void f() {\n"
|
|
" const int i( foo());\n"
|
|
" if(a) {\n"
|
|
" for ( ; i < 10; ++i) ;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope15() {
|
|
// #4573
|
|
varScope("void f() {\n"
|
|
" int a,b,c;\n"
|
|
" if (a);\n"
|
|
" else if(b);\n"
|
|
" else if(c);\n"
|
|
" else;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope16() {
|
|
varScope("void f() {\n"
|
|
" int a = 0;\n"
|
|
" while((++a) < 56) {\n"
|
|
" foo();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("void f() {\n"
|
|
" int a = 0;\n"
|
|
" do {\n"
|
|
" foo();\n"
|
|
" } while((++a) < 56);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("void f() {\n"
|
|
" int a = 0;\n"
|
|
" do {\n"
|
|
" a = 64;\n"
|
|
" foo(a);\n"
|
|
" } while((++a) < 56);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("void f() {\n"
|
|
" int a = 0;\n"
|
|
" do {\n"
|
|
" a = 64;\n"
|
|
" foo(a);\n"
|
|
" } while(z());\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'a' can be reduced.\n", errout.str());
|
|
}
|
|
|
|
void varScope17() {
|
|
varScope("void f() {\n"
|
|
" int x;\n"
|
|
" if (a) {\n"
|
|
" x = stuff(x);\n"
|
|
" morestuff(x);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'x' can be reduced.\n", errout.str());
|
|
|
|
varScope("void f() {\n"
|
|
" int x;\n"
|
|
" if (a) {\n"
|
|
" x = stuff(x);\n"
|
|
" morestuff(x);\n"
|
|
" }\n"
|
|
" if (b) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'x' can be reduced.\n", errout.str());
|
|
}
|
|
|
|
void varScope18() {
|
|
varScope("void f() {\n"
|
|
" short x;\n"
|
|
"\n"
|
|
" switch (ab) {\n"
|
|
" case A:\n"
|
|
" break;\n"
|
|
" case B:\n"
|
|
" default:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"\n"
|
|
" if (c) {\n"
|
|
" x = foo();\n"
|
|
" do_something(x);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'x' can be reduced.\n", errout.str());
|
|
|
|
varScope("void f() {\n"
|
|
" short x;\n"
|
|
"\n"
|
|
" switch (ab) {\n"
|
|
" case A:\n"
|
|
" x = 10;\n"
|
|
" break;\n"
|
|
" case B:\n"
|
|
" default:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"\n"
|
|
" if (c) {\n"
|
|
" x = foo();\n"
|
|
" do_something(x);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("void f() {\n"
|
|
" short x;\n"
|
|
"\n"
|
|
" switch (ab) {\n"
|
|
" case A:\n"
|
|
" if(c)\n"
|
|
" do_something(x);\n"
|
|
" break;\n"
|
|
" case B:\n"
|
|
" default:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'x' can be reduced.\n", errout.str());
|
|
|
|
varScope("void f() {\n"
|
|
" short x;\n"
|
|
"\n"
|
|
" switch (ab) {\n"
|
|
" case A:\n"
|
|
" if(c)\n"
|
|
" do_something(x);\n"
|
|
" break;\n"
|
|
" case B:\n"
|
|
" default:\n"
|
|
" if(d)\n"
|
|
" do_something(x);\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope19() { // Ticket #4994
|
|
varScope("long f () {\n"
|
|
" return a >> extern\n"
|
|
"}\n"
|
|
"long a = 1 ;\n"
|
|
"long b = 2 ;");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope20() { // Ticket #5103 - constant variable only used in inner scope
|
|
varScope("int f(int a) {\n"
|
|
" const int x = 234;\n"
|
|
" int b = a;\n"
|
|
" if (b > 32) b = x;\n"
|
|
" return b;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope21() { // Ticket #5382 - initializing two-dimensional array
|
|
varScope("int test() {\n"
|
|
" int test_value = 3;\n"
|
|
" int test_array[1][1] = { { test_value } };\n"
|
|
" return sizeof(test_array);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope22() { // Ticket #5684 - "The scope of the variable 'p' can be reduced" - But it can not.
|
|
varScope("void foo() {\n"
|
|
" int* p( 42 );\n"
|
|
" int i = 0;\n"
|
|
" while ( i != 100 ) {\n"
|
|
" *p = i;\n"
|
|
" ++p;\n"
|
|
" ++i;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
// try to avoid an obvious false negative after applying the fix for the example above:
|
|
varScope("void foo() {\n"
|
|
" int* p( 42 );\n"
|
|
" int i = 0;\n"
|
|
" int dummy = 0;\n"
|
|
" while ( i != 100 ) {\n"
|
|
" p = & dummy;\n"
|
|
" *p = i;\n"
|
|
" ++p;\n"
|
|
" ++i;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'p' can be reduced.\n", errout.str());
|
|
}
|
|
|
|
void varScope23() { // #6154: Don't suggest to reduce scope if inner scope is a lambda
|
|
varScope("int main() {\n"
|
|
" size_t myCounter = 0;\n"
|
|
" Test myTest([&](size_t aX){\n"
|
|
" std::cout << myCounter += aX << std::endl;\n"
|
|
" });\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void checkOldStylePointerCast(const char code[]) {
|
|
// Clear the error buffer..
|
|
errout.str("");
|
|
|
|
Settings settings;
|
|
settings.addEnabled("style");
|
|
settings.standards.cpp = Standards::CPP03; // #5560
|
|
|
|
// Tokenize..
|
|
Tokenizer tokenizerCpp(&settings, this);
|
|
std::istringstream istr(code);
|
|
tokenizerCpp.tokenize(istr, "test.cpp");
|
|
|
|
Tokenizer tokenizerC(&settings, this);
|
|
std::istringstream istr2(code);
|
|
tokenizerC.tokenize(istr2, "test.c");
|
|
|
|
CheckOther checkOtherCpp(&tokenizerCpp, &settings, this);
|
|
checkOtherCpp.warningOldStylePointerCast();
|
|
|
|
CheckOther checkOtherC(&tokenizerC, &settings, this);
|
|
checkOtherC.warningOldStylePointerCast();
|
|
}
|
|
|
|
void oldStylePointerCast() {
|
|
checkOldStylePointerCast("class Base;\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" Base * b = (Base *) derived;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class Base;\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" Base * b = (const Base *) derived;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class Base;\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" Base * b = (const Base * const) derived;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class Base;\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" Base * b = (volatile Base *) derived;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class Base;\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" Base * b = (volatile Base * const) derived;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class Base;\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" Base * b = (const volatile Base *) derived;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class Base;\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" Base * b = (const volatile Base * const) derived;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class Base;\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" Base * b = (const Base *) ( new Derived() );\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class Base;\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" Base * b = (const Base *) new Derived();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class Base;\n"
|
|
"void foo()\n"
|
|
"{\n"
|
|
" Base * b = (const Base *) new short[10];\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class B;\n"
|
|
"class A\n"
|
|
"{\n"
|
|
" virtual void abc(B *) const = 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
checkOldStylePointerCast("class B;\n"
|
|
"class A\n"
|
|
"{\n"
|
|
" virtual void abc(const B *) const = 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #3630
|
|
checkOldStylePointerCast("class SomeType;\n"
|
|
"class X : public Base {\n"
|
|
" X() : Base((SomeType*)7) {}\n"
|
|
"};");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class SomeType;\n"
|
|
"class X : public Base {\n"
|
|
" X() : Base((SomeType*)var) {}\n"
|
|
"};");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) C-style pointer casting\n", errout.str());
|
|
|
|
checkOldStylePointerCast("class SomeType;\n"
|
|
"class X : public Base {\n"
|
|
" X() : Base((SomeType*)0) {}\n"
|
|
"};");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5560
|
|
checkOldStylePointerCast("class C;\n"
|
|
"\n"
|
|
"class B\n"
|
|
"{ virtual G* createGui(S*, C*) const = 0; };\n"
|
|
"\n"
|
|
"class MS : public M\n"
|
|
"{ virtual void addController(C*) override {} };");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #6164
|
|
checkOldStylePointerCast("class Base {};\n"
|
|
"class Derived: public Base {};\n"
|
|
"void testCC() {\n"
|
|
" std::vector<Base*> v;\n"
|
|
" v.push_back((Base*)new Derived);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5]: (style) C-style pointer casting\n", errout.str());
|
|
}
|
|
|
|
void checkInvalidPointerCast(const char code[], bool portability = true, bool inconclusive = false) {
|
|
// Clear the error buffer..
|
|
errout.str("");
|
|
|
|
Settings settings;
|
|
settings.addEnabled("warning");
|
|
if (portability)
|
|
settings.addEnabled("portability");
|
|
settings.inconclusive = inconclusive;
|
|
|
|
// Tokenize..
|
|
Tokenizer tokenizer(&settings, this);
|
|
std::istringstream istr(code);
|
|
tokenizer.tokenize(istr, "test.cpp");
|
|
|
|
CheckOther checkOtherCpp(&tokenizer, &settings, this);
|
|
checkOtherCpp.invalidPointerCast();
|
|
}
|
|
|
|
|
|
void invalidPointerCast() {
|
|
checkInvalidPointerCast("void test() {\n"
|
|
" float *f = new float[10];\n"
|
|
" delete [] (double*)f;\n"
|
|
" delete [] (long double const*)(new float[10]);\n"
|
|
"}");
|
|
TODO_ASSERT_EQUALS("[test.cpp:3]: (portability) Casting between float* and double* which have an incompatible binary data representation.\n"
|
|
"[test.cpp:4]: (portability) Casting between float* and long double* which have an incompatible binary data representation.\n",
|
|
"[test.cpp:3]: (portability) Casting between float* and double* which have an incompatible binary data representation.\n"
|
|
"[test.cpp:4]: (portability) Casting between float* and double* which have an incompatible binary data representation.\n", errout.str());
|
|
|
|
checkInvalidPointerCast("void test(const float* f) {\n"
|
|
" double *d = (double*)f;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (portability) Casting between float* and double* which have an incompatible binary data representation.\n", errout.str());
|
|
|
|
checkInvalidPointerCast("void test(double* d1) {\n"
|
|
" long double *ld = (long double*)d1;\n"
|
|
" double *d2 = (double*)ld;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (portability) Casting between double* and long double* which have an incompatible binary data representation.\n"
|
|
"[test.cpp:3]: (portability) Casting between long double* and double* which have an incompatible binary data representation.\n", errout.str());
|
|
|
|
checkInvalidPointerCast("char* test(int* i) {\n"
|
|
" long double *d = (long double*)(i);\n"
|
|
" double *d = (double*)(i);\n"
|
|
" float *f = reinterpret_cast<float*>(i);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (portability) Casting between integer* and long double* which have an incompatible binary data representation.\n"
|
|
"[test.cpp:3]: (portability) Casting between integer* and double* which have an incompatible binary data representation.\n"
|
|
"[test.cpp:4]: (portability) Casting between integer* and float* which have an incompatible binary data representation.\n", errout.str());
|
|
|
|
checkInvalidPointerCast("float* test(unsigned int* i) {\n"
|
|
" return (float*)i;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (portability) Casting between integer* and float* which have an incompatible binary data representation.\n", errout.str());
|
|
|
|
checkInvalidPointerCast("float* test(unsigned int* i) {\n"
|
|
" return (float*)i[0];\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
checkInvalidPointerCast("float* test(double& d) {\n"
|
|
" return (float*)&d;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (portability) Casting between double* and float* which have an incompatible binary data representation.\n", errout.str());
|
|
|
|
checkInvalidPointerCast("void test(float* data) {\n"
|
|
" f.write((char*)data,sizeof(float));\n"
|
|
"}", true, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
checkInvalidPointerCast("void test(float* data) {\n"
|
|
" f.write((char*)data,sizeof(float));\n"
|
|
"}", true, true); // #3639
|
|
ASSERT_EQUALS("[test.cpp:2]: (portability, inconclusive) Casting from float* to char* is not portable due to different binary data representations on different platforms.\n", errout.str());
|
|
|
|
|
|
checkInvalidPointerCast("long long* test(float* f) {\n"
|
|
" return (long long*)f;\n"
|
|
"}", false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
checkInvalidPointerCast("long long* test(float* f, char* c) {\n"
|
|
" foo((long long*)f);\n"
|
|
" return reinterpret_cast<long long*>(c);\n"
|
|
"}", true);
|
|
ASSERT_EQUALS("[test.cpp:2]: (portability) Casting from float* to integer* is not portable due to different binary data representations on different platforms.\n", errout.str());
|
|
|
|
checkInvalidPointerCast("Q_DECLARE_METATYPE(int*)"); // #4135 - don't crash
|
|
}
|
|
|
|
void testPassedByValue(const char code[]) {
|
|
// Clear the error buffer..
|
|
errout.str("");
|
|
|
|
Settings settings;
|
|
settings.addEnabled("performance");
|
|
|
|
Tokenizer tokenizer(&settings, this);
|
|
std::istringstream istr(code);
|
|
tokenizer.tokenize(istr, "test.cpp");
|
|
|
|
CheckOther checkOther(&tokenizer, &settings, this);
|
|
checkOther.checkConstantFunctionParameter();
|
|
}
|
|
|
|
void passedByValue() {
|
|
testPassedByValue("void f(const std::string str) {}");
|
|
ASSERT_EQUALS("[test.cpp:1]: (performance) Function parameter 'str' should be passed by reference.\n", errout.str());
|
|
|
|
testPassedByValue("void f(const std::string::size_type x) {}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
testPassedByValue("class Foo;\nvoid f(const Foo foo) {}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (performance) Function parameter 'foo' should be passed by reference.\n", errout.str());
|
|
|
|
testPassedByValue("void f(const std::string &str) {}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
testPassedByValue("void f(const std::vector<int> v) {}");
|
|
ASSERT_EQUALS("[test.cpp:1]: (performance) Function parameter 'v' should be passed by reference.\n", errout.str());
|
|
|
|
testPassedByValue("void f(const std::vector<std::string> v) {}");
|
|
ASSERT_EQUALS("[test.cpp:1]: (performance) Function parameter 'v' should be passed by reference.\n", errout.str());
|
|
|
|
testPassedByValue("void f(const std::vector<std::string>::size_type s) {}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
testPassedByValue("void f(const std::vector<int> &v) {}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
testPassedByValue("void f(const std::map<int,int> &v) {}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
testPassedByValue("void f(const std::map<int,int> v) {}");
|
|
ASSERT_EQUALS("[test.cpp:1]: (performance) Function parameter 'v' should be passed by reference.\n", errout.str());
|
|
|
|
testPassedByValue("void f(const std::map<std::string,std::string> v) {}");
|
|
ASSERT_EQUALS("[test.cpp:1]: (performance) Function parameter 'v' should be passed by reference.\n", errout.str());
|
|
|
|
testPassedByValue("void f(const std::map<int,std::string> v) {}");
|
|
ASSERT_EQUALS("[test.cpp:1]: (performance) Function parameter 'v' should be passed by reference.\n", errout.str());
|
|
|
|
testPassedByValue("void f(const std::map<std::string,int> v) {}");
|
|
ASSERT_EQUALS("[test.cpp:1]: (performance) Function parameter 'v' should be passed by reference.\n", errout.str());
|
|
|
|
testPassedByValue("void f(const std::streamoff pos) {}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5824
|
|
testPassedByValue("void log(const std::string& file, int line, const std::string& function, const std::string str, ...) {}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5534
|
|
testPassedByValue("struct float3 { };\n"
|
|
"typedef float3 vec;\n"
|
|
"class Plane {\n"
|
|
" vec Refract(vec &vec) const;\n"
|
|
" bool IntersectLinePlane(const vec &planeNormal);\n"
|
|
"}; ");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
}
|
|
|
|
void mathfunctionCall_sqrt() {
|
|
// sqrt, sqrtf, sqrtl
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << sqrt(-1) << std::endl;\n"
|
|
" std::cout << sqrtf(-1) << std::endl;\n"
|
|
" std::cout << sqrtl(-1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -1 to sqrt() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing value -1 to sqrtf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing value -1 to sqrtl() leads to implementation-defined result.\n", errout.str());
|
|
|
|
// implementation-defined behaviour for "finite values of x<0" only:
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << sqrt(-0.) << std::endl;\n"
|
|
" std::cout << sqrtf(-0.) << std::endl;\n"
|
|
" std::cout << sqrtl(-0.) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << sqrt(1) << std::endl;\n"
|
|
" std::cout << sqrtf(1) << std::endl;\n"
|
|
" std::cout << sqrtl(1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void mathfunctionCall_log() {
|
|
// log,log10,logf,logl,log10f,log10l
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(-2) << std::endl;\n"
|
|
" std::cout << logf(-2) << std::endl;\n"
|
|
" std::cout << logl(-2) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -2 to log() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing value -2 to logf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing value -2 to logl() leads to implementation-defined result.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(-1) << std::endl;\n"
|
|
" std::cout << logf(-1) << std::endl;\n"
|
|
" std::cout << logl(-1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -1 to log() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing value -1 to logf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing value -1 to logl() leads to implementation-defined result.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(-1.0) << std::endl;\n"
|
|
" std::cout << logf(-1.0) << std::endl;\n"
|
|
" std::cout << logl(-1.0) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -1.0 to log() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing value -1.0 to logf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing value -1.0 to logl() leads to implementation-defined result.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(-0.1) << std::endl;\n"
|
|
" std::cout << logf(-0.1) << std::endl;\n"
|
|
" std::cout << logl(-0.1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -0.1 to log() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing value -0.1 to logf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing value -0.1 to logl() leads to implementation-defined result.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(0) << std::endl;\n"
|
|
" std::cout << logf(0.) << std::endl;\n"
|
|
" std::cout << logl(0.0) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value 0 to log() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing value 0. to logf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing value 0.0 to logl() leads to implementation-defined result.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(1E-3) << std::endl;\n"
|
|
" std::cout << logf(1E-3) << std::endl;\n"
|
|
" std::cout << logl(1E-3) << std::endl;\n"
|
|
" std::cout << log(1.0E-3) << std::endl;\n"
|
|
" std::cout << logf(1.0E-3) << std::endl;\n"
|
|
" std::cout << logl(1.0E-3) << std::endl;\n"
|
|
" std::cout << log(1.0E+3) << std::endl;\n"
|
|
" std::cout << logf(1.0E+3) << std::endl;\n"
|
|
" std::cout << logl(1.0E+3) << std::endl;\n"
|
|
" std::cout << log(2.0) << std::endl;\n"
|
|
" std::cout << logf(2.0) << std::endl;\n"
|
|
" std::cout << logf(2.0f) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::string *log(0);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #3473 - no warning if "log" is a variable
|
|
check("Fred::Fred() : log(0) { }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5748
|
|
check("void f() { foo.log(0); }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void mathfunctionCall_acos() {
|
|
// acos, acosf, acosl
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" return acos(-1) \n"
|
|
" + acos(0.1) \n"
|
|
" + acos(0.0001) \n"
|
|
" + acos(0.01) \n"
|
|
" + acos(1.0E-1) \n"
|
|
" + acos(-1.0E-1) \n"
|
|
" + acos(+1.0E-1) \n"
|
|
" + acos(0.1E-1) \n"
|
|
" + acos(+0.1E-1) \n"
|
|
" + acos(-0.1E-1) \n"
|
|
" + acosf(-1) \n"
|
|
" + acosf(0.1) \n"
|
|
" + acosf(0.0001) \n"
|
|
" + acosf(0.01) \n"
|
|
" + acosf(1.0E-1) \n"
|
|
" + acosf(-1.0E-1) \n"
|
|
" + acosf(+1.0E-1) \n"
|
|
" + acosf(0.1E-1) \n"
|
|
" + acosf(+0.1E-1) \n"
|
|
" + acosf(-0.1E-1) \n"
|
|
" + acosl(-1) \n"
|
|
" + acosl(0.1) \n"
|
|
" + acosl(0.0001) \n"
|
|
" + acosl(0.01) \n"
|
|
" + acosl(1.0E-1) \n"
|
|
" + acosl(-1.0E-1) \n"
|
|
" + acosl(+1.0E-1) \n"
|
|
" + acosl(0.1E-1) \n"
|
|
" + acosl(+0.1E-1) \n"
|
|
" + acosl(-0.1E-1); \n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << acos(1.1) << std::endl;\n"
|
|
" std::cout << acosf(1.1) << std::endl;\n"
|
|
" std::cout << acosl(1.1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value 1.1 to acos() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing value 1.1 to acosf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing value 1.1 to acosl() leads to implementation-defined result.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << acos(-1.1) << std::endl;\n"
|
|
" std::cout << acosf(-1.1) << std::endl;\n"
|
|
" std::cout << acosl(-1.1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -1.1 to acos() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing value -1.1 to acosf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing value -1.1 to acosl() leads to implementation-defined result.\n", errout.str());
|
|
}
|
|
|
|
void mathfunctionCall_asin() {
|
|
// asin, asinf, asinl
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" return asin(1) \n"
|
|
" + asin(-1) \n"
|
|
" + asin(0.1) \n"
|
|
" + asin(0.0001) \n"
|
|
" + asin(0.01) \n"
|
|
" + asin(1.0E-1) \n"
|
|
" + asin(-1.0E-1) \n"
|
|
" + asin(+1.0E-1) \n"
|
|
" + asin(0.1E-1) \n"
|
|
" + asin(+0.1E-1) \n"
|
|
" + asin(-0.1E-1) \n"
|
|
" + asinf(1) \n"
|
|
" + asinf(-1) \n"
|
|
" + asinf(0.1) \n"
|
|
" + asinf(0.0001) \n"
|
|
" + asinf(0.01) \n"
|
|
" + asinf(1.0E-1) \n"
|
|
" + asinf(-1.0E-1) \n"
|
|
" + asinf(+1.0E-1) \n"
|
|
" + asinf(0.1E-1) \n"
|
|
" + asinf(+0.1E-1) \n"
|
|
" + asinf(-0.1E-1) \n"
|
|
" + asinl(1) \n"
|
|
" + asinl(-1) \n"
|
|
" + asinl(0.1) \n"
|
|
" + asinl(0.0001) \n"
|
|
" + asinl(0.01) \n"
|
|
" + asinl(1.0E-1) \n"
|
|
" + asinl(-1.0E-1) \n"
|
|
" + asinl(+1.0E-1) \n"
|
|
" + asinl(0.1E-1) \n"
|
|
" + asinl(+0.1E-1) \n"
|
|
" + asinl(-0.1E-1); \n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << asin(1.1) << std::endl;\n"
|
|
" std::cout << asinf(1.1) << std::endl;\n"
|
|
" std::cout << asinl(1.1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value 1.1 to asin() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing value 1.1 to asinf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing value 1.1 to asinl() leads to implementation-defined result.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << asin(-1.1) << std::endl;\n"
|
|
" std::cout << asinf(-1.1) << std::endl;\n"
|
|
" std::cout << asinl(-1.1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing value -1.1 to asin() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing value -1.1 to asinf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing value -1.1 to asinl() leads to implementation-defined result.\n", errout.str());
|
|
}
|
|
|
|
void mathfunctionCall_pow() {
|
|
// pow, powf, powl
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << pow(0,-10) << std::endl;\n"
|
|
" std::cout << powf(0,-10) << std::endl;\n"
|
|
" std::cout << powl(0,-10) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing values 0 and -10 to pow() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing values 0 and -10 to powf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing values 0 and -10 to powl() leads to implementation-defined result.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << pow(0,10) << std::endl;\n"
|
|
" std::cout << powf(0,10) << std::endl;\n"
|
|
" std::cout << powl(0,10) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void mathfunctionCall_atan2() {
|
|
// atan2
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << atan2(1,1) << std::endl;\n"
|
|
" std::cout << atan2(-1,-1) << std::endl;\n"
|
|
" std::cout << atan2(0.1,1) << std::endl;\n"
|
|
" std::cout << atan2(0.0001,100) << std::endl;\n"
|
|
" std::cout << atan2(0.01m-1) << std::endl;\n"
|
|
" std::cout << atan2(1.0E-1,-3) << std::endl;\n"
|
|
" std::cout << atan2(-1.0E-1,+2) << std::endl;\n"
|
|
" std::cout << atan2(+1.0E-1,0) << std::endl;\n"
|
|
" std::cout << atan2(0.1E-1,3) << std::endl;\n"
|
|
" std::cout << atan2(+0.1E-1,1) << std::endl;\n"
|
|
" std::cout << atan2(-0.1E-1,8) << std::endl;\n"
|
|
" std::cout << atan2f(1,1) << std::endl;\n"
|
|
" std::cout << atan2f(-1,-1) << std::endl;\n"
|
|
" std::cout << atan2f(0.1,1) << std::endl;\n"
|
|
" std::cout << atan2f(0.0001,100) << std::endl;\n"
|
|
" std::cout << atan2f(0.01m-1) << std::endl;\n"
|
|
" std::cout << atan2f(1.0E-1,-3) << std::endl;\n"
|
|
" std::cout << atan2f(-1.0E-1,+2) << std::endl;\n"
|
|
" std::cout << atan2f(+1.0E-1,0) << std::endl;\n"
|
|
" std::cout << atan2f(0.1E-1,3) << std::endl;\n"
|
|
" std::cout << atan2f(+0.1E-1,1) << std::endl;\n"
|
|
" std::cout << atan2f(-0.1E-1,8) << std::endl;\n"
|
|
" std::cout << atan2l(1,1) << std::endl;\n"
|
|
" std::cout << atan2l(-1,-1) << std::endl;\n"
|
|
" std::cout << atan2l(0.1,1) << std::endl;\n"
|
|
" std::cout << atan2l(0.0001,100) << std::endl;\n"
|
|
" std::cout << atan2l(0.01m-1) << std::endl;\n"
|
|
" std::cout << atan2l(1.0E-1,-3) << std::endl;\n"
|
|
" std::cout << atan2l(-1.0E-1,+2) << std::endl;\n"
|
|
" std::cout << atan2l(+1.0E-1,0) << std::endl;\n"
|
|
" std::cout << atan2l(0.1E-1,3) << std::endl;\n"
|
|
" std::cout << atan2l(+0.1E-1,1) << std::endl;\n"
|
|
" std::cout << atan2l(-0.1E-1,8) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << atan2(0,0) << std::endl;\n"
|
|
" std::cout << atan2f(0,0) << std::endl;\n"
|
|
" std::cout << atan2l(0,0) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing values 0 and 0 to atan2() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing values 0 and 0 to atan2f() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing values 0 and 0 to atan2l() leads to implementation-defined result.\n", errout.str());
|
|
}
|
|
|
|
void mathfunctionCall_fmod() {
|
|
// fmod, fmodl, fmodf
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << fmod(1.0,0) << std::endl;\n"
|
|
" std::cout << fmodf(1.0,0) << std::endl;\n"
|
|
" std::cout << fmodl(1.0,0) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Passing values 1.0 and 0 to fmod() leads to implementation-defined result.\n"
|
|
"[test.cpp:4]: (warning) Passing values 1.0 and 0 to fmodf() leads to implementation-defined result.\n"
|
|
"[test.cpp:5]: (warning) Passing values 1.0 and 0 to fmodl() leads to implementation-defined result.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << fmod(1.0,1) << std::endl;\n"
|
|
" std::cout << fmodf(1.0,1) << std::endl;\n"
|
|
" std::cout << fmodl(1.0,1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void mathfunctionCall_precision() {
|
|
check("void foo() {\n"
|
|
" print(exp(x) - 1);\n"
|
|
" print(log(1 + x));\n"
|
|
" print(1 - erf(x));\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Expression 'exp(x) - 1' can be replaced by 'expm1(x)' to avoid loss of precision.\n"
|
|
"[test.cpp:3]: (style) Expression 'log(1 + x)' can be replaced by 'log1p(x)' to avoid loss of precision.\n"
|
|
"[test.cpp:4]: (style) Expression '1 - erf(x)' can be replaced by 'erfc(x)' to avoid loss of precision.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" print(exp(x) - 1.0);\n"
|
|
" print(log(1.0 + x));\n"
|
|
" print(1.0 - erf(x));\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Expression 'exp(x) - 1' can be replaced by 'expm1(x)' to avoid loss of precision.\n"
|
|
"[test.cpp:3]: (style) Expression 'log(1 + x)' can be replaced by 'log1p(x)' to avoid loss of precision.\n"
|
|
"[test.cpp:4]: (style) Expression '1 - erf(x)' can be replaced by 'erfc(x)' to avoid loss of precision.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" print(exp(3 + x*f(a)) - 1);\n"
|
|
" print(log(x*4 + 1));\n"
|
|
" print(1 - erf(34*x + f(x) - c));\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Expression 'exp(x) - 1' can be replaced by 'expm1(x)' to avoid loss of precision.\n"
|
|
"[test.cpp:3]: (style) Expression 'log(1 + x)' can be replaced by 'log1p(x)' to avoid loss of precision.\n"
|
|
"[test.cpp:4]: (style) Expression '1 - erf(x)' can be replaced by 'erfc(x)' to avoid loss of precision.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" print(2*exp(x) - 1);\n"
|
|
" print(1 - erf(x)/2.0);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void switchRedundantAssignmentTest() {
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y = 2;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:9]: (warning) Variable 'y' is reassigned a value before the old one has been used. 'break;' missing?\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" {\n"
|
|
" y = 2;\n"
|
|
" }\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:11]: (warning) Variable 'y' is reassigned a value before the old one has been used. 'break;' missing?\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y = 2;\n"
|
|
" case 3:\n"
|
|
" if (x)\n"
|
|
" {\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" {\n"
|
|
" y = 2;\n"
|
|
" if (z)\n"
|
|
" printf(\"%d\", y);\n"
|
|
" }\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int x = a;\n"
|
|
" int y = 1;\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" x = 2;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y = 2;\n"
|
|
" break;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" while(xyz()) {\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y = 2;\n"
|
|
" continue;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" while(xyz()) {\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y = 2;\n"
|
|
" throw e;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y = 2;\n"
|
|
" printf(\"%d\", y);\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y = 2;\n"
|
|
" bar();\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void bar() {}\n" // bar isn't noreturn
|
|
"void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y = 2;\n"
|
|
" bar();\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:11]: (warning) Variable 'y' is reassigned a value before the old one has been used. 'break;' missing?\n", errout.str());
|
|
|
|
check("void foo(char *str, int a)\n"
|
|
"{\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" strcpy(str, \"a'\");\n"
|
|
" case 3:\n"
|
|
" strcpy(str, \"b'\");\n"
|
|
" }\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:6] -> [test.cpp:8]: (warning) Buffer 'str' is being written before its old content has been used. 'break;' missing?\n", errout.str());
|
|
|
|
check("void foo(char *str, int a)\n"
|
|
"{\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" strncpy(str, \"a'\");\n"
|
|
" case 3:\n"
|
|
" strncpy(str, \"b'\");\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:6] -> [test.cpp:8]: (warning) Buffer 'str' is being written before its old content has been used. 'break;' missing?\n", errout.str());
|
|
|
|
check("void foo(char *str, int a)\n"
|
|
"{\n"
|
|
" int z = 0;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" strcpy(str, \"a'\");\n"
|
|
" z++;\n"
|
|
" case 3:\n"
|
|
" strcpy(str, \"b'\");\n"
|
|
" z++;\n"
|
|
" }\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:10]: (warning) Buffer 'str' is being written before its old content has been used. 'break;' missing?\n", errout.str());
|
|
|
|
check("void foo(char *str, int a)\n"
|
|
"{\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" strcpy(str, \"a'\");\n"
|
|
" break;\n"
|
|
" case 3:\n"
|
|
" strcpy(str, \"b'\");\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(char *str, int a)\n"
|
|
"{\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" strcpy(str, \"a'\");\n"
|
|
" printf(str);\n"
|
|
" case 3:\n"
|
|
" strcpy(str, \"b'\");\n"
|
|
" }\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// Ticket #5158 "segmentation fault (valid code)"
|
|
check("typedef struct ct_data_s {\n"
|
|
" union {\n"
|
|
" char freq;\n"
|
|
" } fc;\n"
|
|
"} ct_data;\n"
|
|
"typedef struct internal_state {\n"
|
|
" struct ct_data_s dyn_ltree[10];\n"
|
|
"} deflate_state;\n"
|
|
"void f(deflate_state *s) {\n"
|
|
" s->dyn_ltree[0].fc.freq++;\n"
|
|
"}\n", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// Ticket #6132 "crash: daca: kvirc CheckOther::checkRedundantAssignment()"
|
|
check("void HttpFileTransfer :: transferTerminated ( bool bSuccess@1 ) {\n"
|
|
"if ( m_szCompletionCallback . isNull ( ) ) {\n"
|
|
"KVS_TRIGGER_EVENT ( KviEvent_OnHTTPGetTerminated , out ? out : ( g_pApp . activeConsole ( ) ) , & vParams )\n"
|
|
"} else {\n"
|
|
"KviKvsScript :: run ( m_szCompletionCallback , out ? out : ( g_pApp . activeConsole ( ) ) , & vParams ) ;\n"
|
|
"}\n"
|
|
"}\n", 0, false, false, false, true);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
}
|
|
|
|
void switchRedundantOperationTest() {
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" ++y;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:9]: (warning) Variable 'y' is reassigned a value before the old one has been used. 'break;' missing?\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" {\n"
|
|
" ++y;\n"
|
|
" }\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:11]: (warning) Variable 'y' is reassigned a value before the old one has been used. 'break;' missing?\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y;\n"
|
|
" case 3:\n"
|
|
" ++y;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" ++y;\n"
|
|
" case 3:\n"
|
|
" ++y;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" --y;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:9]: (warning) Variable 'y' is reassigned a value before the old one has been used. 'break;' missing?\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" {\n"
|
|
" --y;\n"
|
|
" }\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:11]: (warning) Variable 'y' is reassigned a value before the old one has been used. 'break;' missing?\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y;\n"
|
|
" case 3:\n"
|
|
" --y;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" --y;\n"
|
|
" case 3:\n"
|
|
" --y;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y++;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:9]: (warning) Variable 'y' is reassigned a value before the old one has been used. 'break;' missing?\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" {\n"
|
|
" y++;\n"
|
|
" }\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:11]: (warning) Variable 'y' is reassigned a value before the old one has been used. 'break;' missing?\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y = 2;\n"
|
|
" case 3:\n"
|
|
" y++;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y++;\n"
|
|
" case 3:\n"
|
|
" y++;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y--;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:9]: (warning) Variable 'y' is reassigned a value before the old one has been used. 'break;' missing?\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" {\n"
|
|
" y--;\n"
|
|
" }\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:11]: (warning) Variable 'y' is reassigned a value before the old one has been used. 'break;' missing?\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y = 2;\n"
|
|
" case 3:\n"
|
|
" y--;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y--;\n"
|
|
" case 3:\n"
|
|
" y--;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y++;\n"
|
|
" case 3:\n"
|
|
" if (x)\n"
|
|
" {\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" {\n"
|
|
" y++;\n"
|
|
" if (y)\n"
|
|
" printf(\"%d\", y);\n"
|
|
" }\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int x = a;\n"
|
|
" int y = 1;\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" x++;\n"
|
|
" case 3:\n"
|
|
" y++;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y++;\n"
|
|
" break;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" while(xyz()) {\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y++;\n"
|
|
" continue;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" while(xyz()) {\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y++;\n"
|
|
" throw e;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y++;\n"
|
|
" printf(\"%d\", y);\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y++;\n"
|
|
" bar();\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" bar(y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void switchRedundantBitwiseOperationTest() {
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y |= 3;\n"
|
|
" case 3:\n"
|
|
" y |= 3;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7]: (warning) Redundant bitwise operation on 'y' in 'switch' statement. 'break;' missing?\n", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y |= 3;\n"
|
|
" default:\n"
|
|
" y |= 3;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7]: (warning) Redundant bitwise operation on 'y' in 'switch' statement. 'break;' missing?\n", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y |= 3;\n"
|
|
" default:\n"
|
|
" if (z)\n"
|
|
" y |= 3;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y |= z;\n"
|
|
" z++\n"
|
|
" default:\n"
|
|
" y |= z;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y |= 3;\n"
|
|
" bar(y);\n"
|
|
" case 3:\n"
|
|
" y |= 3;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y |= 3;\n"
|
|
" y = 4;\n"
|
|
" case 3:\n"
|
|
" y |= 3;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y &= 3;\n"
|
|
" case 3:\n"
|
|
" y &= 3;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7]: (warning) Redundant bitwise operation on 'y' in 'switch' statement. 'break;' missing?\n", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y |= 3;\n"
|
|
" break;\n"
|
|
" case 3:\n"
|
|
" y |= 3;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y ^= 3;\n"
|
|
" case 3:\n"
|
|
" y ^= 3;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y |= 2;\n"
|
|
" case 3:\n"
|
|
" y |= 3;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y &= 2;\n"
|
|
" case 3:\n"
|
|
" y &= 3;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (a)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" y |= 2;\n"
|
|
" case 3:\n"
|
|
" y &= 2;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void switchFallThroughCase() {
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" break;\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" break;\n"
|
|
" case 2:\n"
|
|
" continue;\n"
|
|
" case 3:\n"
|
|
" return;\n"
|
|
" case 4:\n"
|
|
" exit(1);\n"
|
|
" case 5:\n"
|
|
" goto end;\n"
|
|
" case 6:\n"
|
|
" throw e;\n"
|
|
" case 7:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 0:\n"
|
|
" case 1:\n"
|
|
" break;\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" g();\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5]: (style) Switch falls through case without comment. 'break;' missing?\n", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" g();\n"
|
|
" default:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5]: (style) Switch falls through case without comment. 'break;' missing?\n", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" g();\n"
|
|
" // fall through\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" g();\n"
|
|
" /* FALLTHRU */\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" g();\n"
|
|
" break;\n"
|
|
" // fall through\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7]: (information) Unmatched suppression: switchCaseFallThrough\n", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" {\n"
|
|
" break;\n"
|
|
" }\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" for (;;) {\n"
|
|
" break;\n"
|
|
" }\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7]: (style) Switch falls through case without comment. 'break;' missing?\n", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" if (b) {\n"
|
|
" break;\n"
|
|
" } else {\n"
|
|
" break;\n"
|
|
" }\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" if (b) {\n"
|
|
" break;\n"
|
|
" } else {\n"
|
|
" }\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:8]: (style) Switch falls through case without comment. 'break;' missing?\n", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" if (b) {\n"
|
|
" break;\n"
|
|
" }\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7]: (style) Switch falls through case without comment. 'break;' missing?\n", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" if (b) {\n"
|
|
" } else {\n"
|
|
" break;\n"
|
|
" }\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:8]: (style) Switch falls through case without comment. 'break;' missing?\n", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" if (b) {\n"
|
|
" case 2:\n"
|
|
" } else {\n"
|
|
" break;\n"
|
|
" }\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5]: (style) Switch falls through case without comment. 'break;' missing?\n", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" int x;\n"
|
|
" case 1:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" g();\n"
|
|
" switch (b) {\n"
|
|
" case 1:\n"
|
|
" return;\n"
|
|
" default:\n"
|
|
" return;\n"
|
|
" }\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
// This fails because the switch parsing code currently doesn't understand
|
|
// that all paths after g() actually return. It's a pretty unusual case
|
|
// (no pun intended).
|
|
TODO_ASSERT_EQUALS("",
|
|
"[test.cpp:11]: (style) Switch falls through case without comment. 'break;' missing?\n", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
"#ifndef A\n"
|
|
" g();\n"
|
|
" // fall through\n"
|
|
"#endif\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" goto leave;\n"
|
|
" case 2:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"leave:\n"
|
|
" if (x) {\n"
|
|
" g();\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" switch (a) {\n"
|
|
" case 1:\n"
|
|
" g();\n"
|
|
" // fall through\n"
|
|
" case 2:\n"
|
|
" g();\n"
|
|
" // falls through\n"
|
|
" case 3:\n"
|
|
" g();\n"
|
|
" // fall-through\n"
|
|
" case 4:\n"
|
|
" g();\n"
|
|
" // drop through\n"
|
|
" case 5:\n"
|
|
" g();\n"
|
|
" // pass through\n"
|
|
" case 5:\n"
|
|
" g();\n"
|
|
" // no break\n"
|
|
" case 5:\n"
|
|
" g();\n"
|
|
" // fallthru\n"
|
|
" case 6:\n"
|
|
" g();\n"
|
|
" /* fall */\n"
|
|
" default:\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_preprocess_suppress(
|
|
"void foo() {\n"
|
|
" // unrelated comment saying 'fall through'\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void unreachableCode() {
|
|
check("void foo(int a) {\n"
|
|
" while(1) {\n"
|
|
" if (a++ >= 100) {\n"
|
|
" break;\n"
|
|
" continue;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:5]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
check("int foo(int a) {\n"
|
|
" return 0;\n"
|
|
" return(a-1);\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
check("int foo(int a) {\n"
|
|
" A:"
|
|
" return(0);\n"
|
|
" goto A;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
Settings settings;
|
|
settings.library.setnoreturn("exit", true);
|
|
check("void foo() {\n"
|
|
" exit(0);\n"
|
|
" break;\n"
|
|
"}", 0, false, false, false, false, &settings);
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
check("class NeonSession {\n"
|
|
" void exit();\n"
|
|
"};\n"
|
|
"void NeonSession::exit()\n"
|
|
"{\n"
|
|
" SAL_INFO(\"ucb.ucp.webdav\", \"neon commands cannot be aborted\");\n"
|
|
"}", 0, false, false, false, false, &settings);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void NeonSession::exit()\n"
|
|
"{\n"
|
|
" SAL_INFO(\"ucb.ucp.webdav\", \"neon commands cannot be aborted\");\n"
|
|
"}", 0, false, false, false, false, &settings);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() { xResAccess->exit(); }", 0, false, false, false, false, &settings);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" switch(a) {\n"
|
|
" case 0:\n"
|
|
" printf(\"case 0\");\n"
|
|
" break;\n"
|
|
" break;\n"
|
|
" case 1:\n"
|
|
" c++;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:7]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" switch(a) {\n"
|
|
" case 0:\n"
|
|
" printf(\"case 0\");\n"
|
|
" break;\n"
|
|
" case 1:\n"
|
|
" c++;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" while(true) {\n"
|
|
" if (a++ >= 100) {\n"
|
|
" break;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
" }\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:6]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" while(true) {\n"
|
|
" if (a++ >= 100) {\n"
|
|
" continue;\n"
|
|
" continue;\n"
|
|
" }\n"
|
|
" a+=2;\n"
|
|
" }\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:6]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
check("void foo(int a)\n"
|
|
"{\n"
|
|
" while(true) {\n"
|
|
" if (a++ >= 100) {\n"
|
|
" continue;\n"
|
|
" }\n"
|
|
" a+=2;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int foo() {\n"
|
|
" throw 0;\n"
|
|
" return 1;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" throw 0;\n"
|
|
" return;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
check("int foo() {\n"
|
|
" return 0;\n"
|
|
" return 1;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
check("int foo() {\n"
|
|
" return 0;\n"
|
|
" foo();\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Statements following return, break, continue, goto or throw will never be executed.\n", errout.str());
|
|
|
|
check("int foo() {\n"
|
|
" if(bar)\n"
|
|
" return 0;\n"
|
|
" return 124;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int foo() {\n"
|
|
" while(bar) {\n"
|
|
" return 0;\n"
|
|
" return 0;\n"
|
|
" return 0;\n"
|
|
" return 0;\n"
|
|
" }\n"
|
|
" return 124;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" while(bar) {\n"
|
|
" return;\n"
|
|
" break;\n"
|
|
" }\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:4]: (style) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
// #5707
|
|
check("extern int i,j\n"
|
|
"int foo() {\n"
|
|
" switch(i) {\n"
|
|
" default: j=1; break;\n"
|
|
" }\n"
|
|
" return 0;\n"
|
|
" j=2;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:7]: (style) Statements following return, break, continue, goto or throw will never be executed.\n", errout.str());
|
|
|
|
check("int foo() {\n"
|
|
" return 0;\n"
|
|
" label:\n"
|
|
" throw 0;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" wxCHECK2(state < 3 && state >= 0, return);\n"
|
|
" _checkboxState = state;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("struct A {\n"
|
|
" virtual void foo (P & Val) throw ();\n"
|
|
" virtual void foo1 (P & Val) throw ();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int foo() {\n"
|
|
" goto label;\n"
|
|
" while (true) {\n"
|
|
" bar();\n"
|
|
" label:\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str()); // #3457
|
|
|
|
check("int foo() {\n"
|
|
" goto label;\n"
|
|
" do {\n"
|
|
" bar();\n"
|
|
" label:\n"
|
|
" } while (true);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str()); // #3457
|
|
|
|
check("int foo() {\n"
|
|
" goto label;\n"
|
|
" for (;;) {\n"
|
|
" bar();\n"
|
|
" label:\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str()); // #3457
|
|
|
|
check("%: return ; ()"); // Don't crash. #3441.
|
|
|
|
// #3383. TODO: Use preprocessor
|
|
check("int foo() {\n"
|
|
"\n" // #ifdef A
|
|
" return 0;\n"
|
|
"\n" // #endif
|
|
" return 1;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("int foo() {\n"
|
|
"\n" // #ifdef A
|
|
" return 0;\n"
|
|
"\n" // #endif
|
|
" return 1;\n"
|
|
"}", 0, false, true, false, false);
|
|
ASSERT_EQUALS("[test.cpp:5]: (style, inconclusive) Consecutive return, break, continue, goto or throw statements are unnecessary.\n", errout.str());
|
|
|
|
// #4711 lambda functions
|
|
check("int f() {\n"
|
|
" return g([](int x){x+1; return x;});\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #4756
|
|
check("template <>\n"
|
|
"inline uint16_t htobe(uint16_t value) {\n"
|
|
" return ( __extension__ ({\n"
|
|
" register unsigned short int __v, __x = (unsigned short int) (value);\n"
|
|
" if (__builtin_constant_p (__x))\n"
|
|
" __v = ((unsigned short int) ((((__x) >> 8) & 0xff) | (((__x) & 0xff) << 8)));\n"
|
|
" else\n"
|
|
" __asm__ (\"rorw $8, %w0\" : \"=r\" (__v) : \"0\" (__x) : \"cc\");\n"
|
|
" __v;\n"
|
|
" }));\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #6008
|
|
check("static std::function< int ( int, int ) > GetFunctor() {\n"
|
|
" return [](int a_, int b_) -> int {\n"
|
|
" int sum = a_ + b_;\n"
|
|
" return sum;\n"
|
|
" };\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5789
|
|
check("struct per_state_info {\n"
|
|
" uint64_t enter, exit;\n"
|
|
" uint64_t events;\n"
|
|
" per_state_info() : enter(0), exit(0), events(0) {}\n"
|
|
"};", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// Garbage code - don't crash
|
|
check("namespace pr16989 {\n"
|
|
" class C {\n"
|
|
" C tpl_mem(T *) { return }\n"
|
|
" };\n"
|
|
"}");
|
|
}
|
|
|
|
|
|
void suspiciousCase() {
|
|
check("void foo() {\n"
|
|
" switch(a) {\n"
|
|
" case A&&B:\n"
|
|
" foo();\n"
|
|
" case (A||B):\n"
|
|
" foo();\n"
|
|
" case A||B:\n"
|
|
" foo();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning, inconclusive) Found suspicious case label in switch(). Operator '&&' probably doesn't work as intended.\n"
|
|
"[test.cpp:5]: (warning, inconclusive) Found suspicious case label in switch(). Operator '||' probably doesn't work as intended.\n"
|
|
"[test.cpp:7]: (warning, inconclusive) Found suspicious case label in switch(). Operator '||' probably doesn't work as intended.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" switch(a) {\n"
|
|
" case 1:\n"
|
|
" a=A&&B;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" switch(a) {\n"
|
|
" case A&&B?B:A:\n"
|
|
" foo();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void suspiciousEqualityComparison() {
|
|
check("void foo(int c) {\n"
|
|
" if (c == 1) c == 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Found suspicious equality comparison. Did you intend to assign a value instead?\n", errout.str());
|
|
|
|
check("void foo(int* c) {\n"
|
|
" if (*c == 1) *c == 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Found suspicious equality comparison. Did you intend to assign a value instead?\n", errout.str());
|
|
|
|
|
|
check("void foo(int c) {\n"
|
|
" if (c == 1) {\n"
|
|
" c = 0;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int c) {\n"
|
|
" c == 1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Found suspicious equality comparison. Did you intend to assign a value instead?\n", errout.str());
|
|
|
|
check("void foo(int c) {\n"
|
|
" for (int i = 0; i == 10; i ++) {\n"
|
|
" a ++;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int c) {\n"
|
|
" for (i == 0; i < 10; i ++) {\n"
|
|
" c ++;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Found suspicious equality comparison. Did you intend to assign a value instead?\n", errout.str());
|
|
|
|
check("void foo(int c) {\n"
|
|
" for (i == 1; i < 10; i ++) {\n"
|
|
" c ++;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Found suspicious equality comparison. Did you intend to assign a value instead?\n", errout.str());
|
|
|
|
check("void foo(int c) {\n"
|
|
" for (i == 2; i < 10; i ++) {\n"
|
|
" c ++;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Found suspicious equality comparison. Did you intend to assign a value instead?\n", errout.str());
|
|
|
|
check("void foo(int c) {\n"
|
|
" for (int i = 0; i < 10; i == c) {\n"
|
|
" c ++;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Found suspicious equality comparison. Did you intend to assign a value instead?\n", errout.str());
|
|
|
|
check("void foo(int c) {\n"
|
|
" for (; running == 1;) {\n"
|
|
" c ++;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int c) {\n"
|
|
" printf(\"%i\n\", ({x==0;}));\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int x) {\n"
|
|
" printf(\"%i\n\", ({int x = do_something(); x == 0;}));\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int x) {\n"
|
|
" printf(\"%i\n\", ({x == 0; x > 0 ? 10 : 20}));\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Found suspicious equality comparison. Did you intend to assign a value instead?\n", errout.str());
|
|
|
|
check("void foo(int x) {\n"
|
|
" for (const Token* end = tok->link(); tok != end; tok = (tok == end) ? end : tok->next()) {\n"
|
|
" x++;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int x) {\n"
|
|
" for (int i = (x == 0) ? 0 : 5; i < 10; i ++) {\n"
|
|
" x++;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo(int x) {\n"
|
|
" for (int i = 0; i < 10; i += (x == 5) ? 1 : 2) {\n"
|
|
" x++;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void selfAssignment() {
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int x = 1;\n"
|
|
" x = x;\n"
|
|
" return 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (warning) Redundant assignment of 'x' to itself.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int x = x;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Redundant assignment of 'x' to itself.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::string var = var = \"test\";\n"
|
|
"}");
|
|
TODO_ASSERT_EQUALS("[test.cpp:3]: (warning) Redundant assignment of 'var' to itself.\n", "", errout.str());
|
|
|
|
check("struct A { int b; };\n"
|
|
"void foo(A* a1, A* a2) {\n"
|
|
" a1->b = a1->b;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Redundant assignment of 'a1.b' to itself.\n", errout.str());
|
|
|
|
// #4073 (segmentation fault)
|
|
check("void Foo::myFunc( int a )\n"
|
|
"{\n"
|
|
" if (a == 42)\n"
|
|
" a = a;\n"
|
|
"}");
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int x = 1;\n"
|
|
" x = x + 1;\n"
|
|
" return 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int *x = getx();\n"
|
|
" *x = x;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" BAR *x = getx();\n"
|
|
" x = x;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Redundant assignment of 'x' to itself.\n", errout.str());
|
|
|
|
// #2502 - non-primitive type -> there might be some side effects
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" Fred fred; fred = fred;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(int x) {\n"
|
|
" x = (x == 0);"
|
|
" func(x);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(int x) {\n"
|
|
" x = (x != 0);"
|
|
" func(x);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// ticket #3001 - false positive
|
|
check("void foo(int x) {\n"
|
|
" x = x ? x : 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #3800 - false negative when variable is extern
|
|
check("extern int i;\n"
|
|
"void f() {\n"
|
|
" i = i;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Redundant assignment of 'i' to itself.\n", errout.str());
|
|
|
|
// #4291 - id for variables accessed through 'this'
|
|
check("class Foo {\n"
|
|
" int var;\n"
|
|
" void func();\n"
|
|
"};\n"
|
|
"void Foo::func() {\n"
|
|
" this->var = var;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:6]: (warning) Redundant assignment of 'this.var' to itself.\n", errout.str());
|
|
|
|
check("class Foo {\n"
|
|
" int var;\n"
|
|
" void func(int var);\n"
|
|
"};\n"
|
|
"void Foo::func(int var) {\n"
|
|
" this->var = var;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void trac1132() {
|
|
check("class Lock\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" Lock(int i)\n"
|
|
" {\n"
|
|
" std::cout << \"Lock \" << i << std::endl;\n"
|
|
" }\n"
|
|
" ~Lock()\n"
|
|
" {\n"
|
|
" std::cout << \"~Lock\" << std::endl;\n"
|
|
" }\n"
|
|
"};\n"
|
|
"int main()\n"
|
|
"{\n"
|
|
" Lock(123);\n"
|
|
" std::cout << \"hello\" << std::endl;\n"
|
|
" return 0;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:15]: (error) Instance of 'Lock' object is destroyed immediately.\n", errout.str());
|
|
}
|
|
|
|
void trac3693() {
|
|
check("struct A{\n"
|
|
" enum {\n"
|
|
" b = 300\n"
|
|
" };\n"
|
|
"};\n"
|
|
"const int DFLT_TIMEOUT = A::b % 1000000 ;\n", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectDoesNotPickFunction1() {
|
|
check("int main ( )\n"
|
|
"{\n"
|
|
" CouldBeFunction ( 123 ) ;\n"
|
|
" return 0 ;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectDoesNotPickFunction2() {
|
|
check("struct error {\n"
|
|
" error() {}\n"
|
|
"};\n"
|
|
"\n"
|
|
"class parser {\n"
|
|
"public:\n"
|
|
" void error() const {}\n"
|
|
"\n"
|
|
" void foo() const {\n"
|
|
" error();\n"
|
|
" do_something();\n"
|
|
" }\n"
|
|
"};\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectPicksClass() {
|
|
check("class NotAFunction ;\n"
|
|
"int function ( )\n"
|
|
"{\n"
|
|
" NotAFunction ( 123 );\n"
|
|
" return 0 ;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Instance of 'NotAFunction' object is destroyed immediately.\n", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectPicksStruct() {
|
|
check("struct NotAClass;\n"
|
|
"bool func ( )\n"
|
|
"{\n"
|
|
" NotAClass ( 123 ) ;\n"
|
|
" return true ;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Instance of 'NotAClass' object is destroyed immediately.\n", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectDoesNotPickIf() {
|
|
check("bool func( int a , int b , int c )\n"
|
|
"{\n"
|
|
" if ( a > b ) return c == a ;\n"
|
|
" return b == a ;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectDoesNotPickConstructorDeclaration() {
|
|
check("class Something : public SomethingElse\n"
|
|
"{\n"
|
|
"public:\n"
|
|
"~Something ( ) ;\n"
|
|
"Something ( ) ;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectDoesNotPickFunctor() {
|
|
check("class IncrementFunctor\n"
|
|
"{\n"
|
|
"public:\n"
|
|
" void operator()(int &i)\n"
|
|
" {\n"
|
|
" ++i;\n"
|
|
" }\n"
|
|
"};\n"
|
|
"\n"
|
|
"int main()\n"
|
|
"{\n"
|
|
" int a = 1;\n"
|
|
" IncrementFunctor()(a);\n"
|
|
" return a;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectDoesNotPickLocalClassConstructors() {
|
|
check("void f() {\n"
|
|
" class Foo {\n"
|
|
" Foo() { }\n"
|
|
" Foo(int a) { }\n"
|
|
" Foo(int a, int b) { }\n"
|
|
" };\n"
|
|
" Foo();\n"
|
|
" do_something();\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:7]: (error) Instance of 'Foo' object is destroyed immediately.\n", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectDoesNotPickUsedObject() {
|
|
check("struct Foo {\n"
|
|
" void bar() {\n"
|
|
" }\n"
|
|
"};\n"
|
|
"\n"
|
|
"void fn() {\n"
|
|
" Foo().bar();\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectDoesNotPickPureC() {
|
|
// Ticket #2352
|
|
const char code[] = "struct cb_watch_bool {\n"
|
|
" int a;\n"
|
|
"};\n"
|
|
"\n"
|
|
"void f()\n"
|
|
"{\n"
|
|
" cb_watch_bool();\n"
|
|
" do_something();\n"
|
|
"}\n";
|
|
|
|
check(code, "test.cpp");
|
|
ASSERT_EQUALS("[test.cpp:7]: (error) Instance of 'cb_watch_bool' object is destroyed immediately.\n", errout.str());
|
|
|
|
check(code, "test.c");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// Ticket #2639
|
|
check("struct stat { int a; int b; };\n"
|
|
"void stat(const char *fn, struct stat *);\n"
|
|
"\n"
|
|
"void foo() {\n"
|
|
" stat(\"file.txt\", &st);\n"
|
|
" do_something();\n"
|
|
"}");
|
|
ASSERT_EQUALS("",errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectDoesNotPickNestedClass() {
|
|
const char code[] = "class ios_base {\n"
|
|
"public:\n"
|
|
" class Init {\n"
|
|
" public:\n"
|
|
" };\n"
|
|
"};\n"
|
|
"class foo {\n"
|
|
"public:\n"
|
|
" foo();\n"
|
|
" void Init(int);\n"
|
|
"};\n"
|
|
"foo::foo() {\n"
|
|
" Init(0);\n"
|
|
" do_something();\n"
|
|
"}\n";
|
|
|
|
check(code, "test.cpp");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectInConstructor() {
|
|
const char code[] = "class Foo {\n"
|
|
"public:\n"
|
|
" Foo(char x) {\n"
|
|
" Foo(x, 0);\n"
|
|
" do_something();\n"
|
|
" }\n"
|
|
" Foo(char x, int y) { }\n"
|
|
"};\n";
|
|
check(code, "test.cpp");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Instance of 'Foo' object is destroyed immediately.\n", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectNoCodeAfter() {
|
|
check("class Foo {};\n"
|
|
"void f() {\n"
|
|
" Foo();\n" // No code after class => don't warn
|
|
"}", "test.cpp");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void trac2084() {
|
|
check("void f()\n"
|
|
"{\n"
|
|
" struct sigaction sa;\n"
|
|
"\n"
|
|
" { sigaction(SIGHUP, &sa, 0); };\n"
|
|
" { sigaction(SIGINT, &sa, 0); };\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void trac2071() {
|
|
check("void f() {\n"
|
|
" struct AB {\n"
|
|
" AB(int a) { }\n"
|
|
" };\n"
|
|
"\n"
|
|
" const AB ab[3] = { AB(0), AB(1), AB(2) };\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void memsetZeroBytes() {
|
|
check("void f() {\n"
|
|
" memset(p, 10, 0x0);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) memset() called to fill 0 bytes of 'p'.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" memset(p, sizeof(p), 0);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) memset() called to fill 0 bytes of 'p'.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" memset(p, sizeof(p), i);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void memsetInvalid2ndParam() {
|
|
check("void f() {\n"
|
|
" int* is = new int[10];\n"
|
|
" memset(is, 1.0f, 40);\n"
|
|
" int* is2 = new int[10];\n"
|
|
" memset(is2, 0.1f, 40);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (portability) The 2nd memset() argument '1.0f' is a float, its representation is implementation defined.\n"
|
|
"[test.cpp:5]: (portability) The 2nd memset() argument '0.1f' is a float, its representation is implementation defined.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int* is = new int[10];\n"
|
|
" float g = computeG();\n"
|
|
" memset(is, g, 40);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (portability) The 2nd memset() argument 'g' is a float, its representation is implementation defined.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int* is = new int[10];\n"
|
|
" memset(is, 0.0f, 40);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n" // FP
|
|
" float x = 2.3f;\n"
|
|
" memset(a, (x?64:0), 40);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" short ss[] = {1, 2};\n"
|
|
" memset(ss, 256, 4);\n"
|
|
" short ss2[2];\n"
|
|
" memset(ss2, -129, 4);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) The 2nd memset() argument '256' doesn't fit into an 'unsigned char'.\n"
|
|
"[test.cpp:5]: (warning) The 2nd memset() argument '-129' doesn't fit into an 'unsigned char'.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int is[10];\n"
|
|
" memset(is, 0xEE, 40);\n"
|
|
" unsigned char* cs = malloc(256);\n"
|
|
" memset(cs, -1, 256);\n"
|
|
" short* ss[30];\n"
|
|
" memset(ss, -128, 60);\n"
|
|
" char cs2[30];\n"
|
|
" memset(cs2, 255, 30);\n"
|
|
" char cs3[30];\n"
|
|
" memset(cs3, 0, 30);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int is[10];\n"
|
|
" const int i = g();\n"
|
|
" memset(is, 1.0f + i, 40);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:4]: (portability) The 2nd memset() argument '1.0f+i' is a float, its representation is implementation defined.\n", errout.str());
|
|
}
|
|
|
|
void redundantGetAndSetUserId() {
|
|
check("seteuid(geteuid());\n", nullptr, false , false, true);
|
|
ASSERT_EQUALS("[test.cpp:1]: (warning) Redundant get and set of user id.\n", errout.str());
|
|
check("setuid(getuid());\n", nullptr, false , false, true);
|
|
ASSERT_EQUALS("[test.cpp:1]: (warning) Redundant get and set of user id.\n", errout.str());
|
|
check("setgid(getgid());\n", nullptr, false , false, true);
|
|
ASSERT_EQUALS("[test.cpp:1]: (warning) Redundant get and set of user id.\n", errout.str());
|
|
check("setegid(getegid());\n", nullptr, false , false, true);
|
|
ASSERT_EQUALS("[test.cpp:1]: (warning) Redundant get and set of user id.\n", errout.str());
|
|
|
|
check("seteuid(getuid());\n", nullptr, false , false, true);
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("seteuid(foo());\n", nullptr, false , false, true);
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("foo(getuid());\n", nullptr, false , false, true);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void clarifyCalculation() {
|
|
check("int f(char c) {\n"
|
|
" return 10 * (c == 0) ? 1 : 2;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Clarify calculation precedence for '*' and '?'.\n", errout.str());
|
|
|
|
check("void f(char c) {\n"
|
|
" printf(\"%i\", 10 * (c == 0) ? 1 : 2);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Clarify calculation precedence for '*' and '?'.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" return (2*a)?b:c;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// Ticket #2585 - segmentation fault for invalid code
|
|
check("abcdef?""?<"
|
|
"123456?""?>"
|
|
"+?""?=");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(char c) {\n"
|
|
" printf(\"%i\", 1 + 1 ? 1 : 2);\n" // "1+1" is simplified away
|
|
"}",0,false,false,false,false);
|
|
TODO_ASSERT_EQUALS("[test.cpp:2]: (style) Clarify calculation precedence for '+' and '?'.\n", "", errout.str()); // TODO: Is that really necessary, or is this pattern too unlikely?
|
|
|
|
check("void f() {\n"
|
|
" std::cout << x << 1 ? 2 : 3;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Clarify calculation precedence for '<<' and '?'.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int ab = a - b ? 2 : 3;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Clarify calculation precedence for '-' and '?'.\n", errout.str());
|
|
|
|
// ticket #195
|
|
check("int f(int x, int y) {\n"
|
|
" return x >> ! y ? 8 : 2;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Clarify calculation precedence for '>>' and '?'.\n", errout.str());
|
|
|
|
check("int f() {\n"
|
|
" return shift < sizeof(int64_t)*8 ? 1 : 2;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() { a = *p ? 1 : 2; }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void clarifyStatement() {
|
|
check("char* f(char* c) {\n"
|
|
" *c++;\n"
|
|
" return c;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Ineffective statement similar to '*A++;'. Did you intend to write '(*A)++;'?\n", errout.str());
|
|
|
|
check("char* f(char** c) {\n"
|
|
" *c[5]--;\n"
|
|
" return *c;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Ineffective statement similar to '*A++;'. Did you intend to write '(*A)++;'?\n", errout.str());
|
|
|
|
check("void f(Foo f) {\n"
|
|
" *f.a++;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Ineffective statement similar to '*A++;'. Did you intend to write '(*A)++;'?\n", errout.str());
|
|
|
|
check("void f(Foo f) {\n"
|
|
" *f.a[5].v[3]++;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Ineffective statement similar to '*A++;'. Did you intend to write '(*A)++;'?\n", errout.str());
|
|
|
|
check("void f(Foo f) {\n"
|
|
" *f.a(1, 5).v[x + y]++;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Ineffective statement similar to '*A++;'. Did you intend to write '(*A)++;'?\n", errout.str());
|
|
|
|
check("char* f(char* c) {\n"
|
|
" (*c)++;\n"
|
|
" return c;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(char* c) {\n"
|
|
" bar(*c++);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("char*** f(char*** c) {\n"
|
|
" ***c++;\n"
|
|
" return c;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Ineffective statement similar to '*A++;'. Did you intend to write '(*A)++;'?\n", errout.str());
|
|
|
|
check("char** f(char*** c) {\n"
|
|
" **c[5]--;\n"
|
|
" return **c;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Ineffective statement similar to '*A++;'. Did you intend to write '(*A)++;'?\n", errout.str());
|
|
|
|
check("char*** f(char*** c) {\n"
|
|
" (***c)++;\n"
|
|
" return c;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void *f(char** c) {\n"
|
|
" bar(**c++);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5166 segmentation fault (invalid code) in lib/checkother.cpp:329 ( void * f { } void b ( ) { * f } )
|
|
check("void * f { } void b ( ) { * f }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void duplicateBranch() {
|
|
check("void f(int a, int &b) {\n"
|
|
" if (a)\n"
|
|
" b = 1;\n"
|
|
" else\n"
|
|
" b = 1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4] -> [test.cpp:2]: (style, inconclusive) Found duplicate branches for 'if' and 'else'.\n", errout.str());
|
|
|
|
check("void f(int a, int &b) {\n"
|
|
" if (a) {\n"
|
|
" if (a == 1)\n"
|
|
" b = 2;\n"
|
|
" else\n"
|
|
" b = 2;\n"
|
|
" } else\n"
|
|
" b = 1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:3]: (style, inconclusive) Found duplicate branches for 'if' and 'else'.\n", errout.str());
|
|
|
|
check("void f(int a, int &b) {\n"
|
|
" if (a == 1)\n"
|
|
" b = 1;\n"
|
|
" else {\n"
|
|
" if (a)\n"
|
|
" b = 2;\n"
|
|
" else\n"
|
|
" b = 2;\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7] -> [test.cpp:5]: (style, inconclusive) Found duplicate branches for 'if' and 'else'.\n", errout.str());
|
|
|
|
check("int f(int signed, unsigned char value) {\n"
|
|
" int ret;\n"
|
|
" if (signed)\n"
|
|
" ret = (signed char)value;\n" // cast must be kept so the simplifications and verification is skipped
|
|
" else\n"
|
|
" ret = (unsigned char)value;\n"
|
|
" return ret;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" if (b)\n"
|
|
" __asm__(\"mov ax, bx\");\n"
|
|
" else\n"
|
|
" __asm__(\"mov bx, bx\");\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str()); // #3407
|
|
|
|
check("void f() {\n"
|
|
" if (b)\n"
|
|
" __asm__(\"mov ax, bx\");\n"
|
|
" else\n"
|
|
" __asm__(\"mov ax, bx\");\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4] -> [test.cpp:2]: (style, inconclusive) Found duplicate branches for 'if' and 'else'.\n", errout.str());
|
|
}
|
|
|
|
void duplicateBranch1() {
|
|
|
|
// tests inspired by http://www.viva64.com/en/b/0149/ ( Comparison between PVS-Studio and cppcheck )
|
|
// Errors detected in Quake 3: Arena by PVS-Studio: Fragement 2
|
|
check("void f()\n"
|
|
"{\n"
|
|
" if (front < 0)\n"
|
|
" frac = front/(front-back);\n"
|
|
" else\n"
|
|
" frac = front/(front-back);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:3]: (style, inconclusive) Found duplicate branches for 'if' and 'else'.\n", errout.str());
|
|
|
|
check("void f()\n"
|
|
"{\n"
|
|
" if (front < 0)\n"
|
|
" { frac = front/(front-back);}\n"
|
|
" else\n"
|
|
" frac = front/((front-back));\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:3]: (style, inconclusive) Found duplicate branches for 'if' and 'else'.\n", errout.str());
|
|
|
|
// No message about empty branches (#5354)
|
|
check("void f()\n"
|
|
"{\n"
|
|
" if (front < 0)\n"
|
|
" {}\n"
|
|
" else\n"
|
|
" {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void duplicateBranch2() {
|
|
Preprocessor::macroChar = '$';
|
|
|
|
check("void f(int x) {\n" // #4329
|
|
" if (x)\n"
|
|
" $;\n"
|
|
" else\n"
|
|
" $;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void duplicateExpression1() {
|
|
check("void foo(int a) {\n"
|
|
" if (a == a) { }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '=='.\n", errout.str());
|
|
|
|
check("void fun(int b) {\n"
|
|
" return a && a ||\n"
|
|
" b == b &&\n"
|
|
" d > d &&\n"
|
|
" e < e &&\n"
|
|
" f ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '&&'.\n"
|
|
"[test.cpp:3] -> [test.cpp:3]: (style) Same expression on both sides of '=='.\n"
|
|
"[test.cpp:4] -> [test.cpp:4]: (style) Same expression on both sides of '>'.\n"
|
|
"[test.cpp:5] -> [test.cpp:5]: (style) Same expression on both sides of '<'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" return a && a;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '&&'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" a = b && b;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '&&'.\n", errout.str());
|
|
|
|
check("void foo(int b) {\n"
|
|
" f(a,b == b);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '=='.\n", errout.str());
|
|
|
|
check("void foo(int b) {\n"
|
|
" f(b == b, a);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '=='.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (x!=2 || x!=2) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '||'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (x!=2 || y!=3 || x!=2) {}\n"
|
|
"}");
|
|
TODO_ASSERT_EQUALS("error", "", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (x!=2 && (x=y) && x!=2) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (a && b || a && b) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '||'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (a && b || b && c) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (a && b | b && c) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '|'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if ((a + b) | (a + b)) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '|'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if ((a | b) & (a | b)) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '&'.\n", errout.str());
|
|
|
|
check("void foo(int a, int b) {\n"
|
|
" if ((a | b) == (a | b)) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '=='.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (a1[a2[c & 0xff] & 0xff]) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void d(const char f, int o, int v)\n"
|
|
"{\n"
|
|
" if (((f=='R') && (o == 1) && ((v < 2) || (v > 99))) ||\n"
|
|
" ((f=='R') && (o == 2) && ((v < 2) || (v > 99))) ||\n"
|
|
" ((f=='T') && (o == 2) && ((v < 200) || (v > 9999)))) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int f(int x) { return x+x; }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (a && b && b) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '&&'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (a || b || b) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '||'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (a / 1000 / 1000) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int foo(int i) {\n"
|
|
" return i/i;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '/'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (a << 1 << 1) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int f() { return !!y; }"); // No FP
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// make sure there are not "same expression" fp when there are different casts
|
|
check("void f(long x) { if ((int32_t)x == (int64_t)x) {} }",
|
|
nullptr, // filename
|
|
false, // experimental
|
|
false, // inconclusive
|
|
false, // posix
|
|
false, // runSimpleChecks
|
|
nullptr // settings
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// make sure there are not "same expression" fp when there are different ({}) expressions
|
|
check("void f(long x) { if (({ 1+2; }) == ({3+4};)) {} }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5535: Reference named like its type
|
|
check("void foo() { UMSConfig& UMSConfig = GetUMSConfiguration(); }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #3868 - false positive (same expression on both sides of |)
|
|
check("void f(int x) {\n"
|
|
" a = x ? A | B | C\n"
|
|
" : A | B;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" bool a = bar.isSet() && bar->isSet();\n"
|
|
" bool b = bar.isSet() && bar.isSet();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:3]: (style) Same expression on both sides of '&&'.\n", errout.str());
|
|
|
|
|
|
check("void foo() {\n"
|
|
" if ((b + a) | (a + b)) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '|'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if ((b > a) | (a > b)) {}\n" // > is not commutative
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if ((b + a) > (a + b)) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '>'.\n", errout.str());
|
|
|
|
check("void f(int x) {\n"
|
|
" if ((x == 1) && (x == 0x00000001))\n"
|
|
" a++;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '&&'.\n", errout.str());
|
|
}
|
|
|
|
void duplicateExpression2() { // check if float is NaN or Inf
|
|
check("int f(long double ldbl, double dbl, float flt) {\n" // ticket #2730
|
|
" if (ldbl != ldbl) have_nan = 1;\n"
|
|
" if (!(dbl == dbl)) have_nan = 1;\n"
|
|
" if (flt != flt) have_nan = 1;\n"
|
|
" return have_nan;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("float f(float x) { return x-x; }"); // ticket #4485 (Inf)
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("float f(float x) { return (X double)x == (X double)x; }", nullptr, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("struct X { float f; };\n"
|
|
"float f(struct X x) { return x.f == x.f; }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("struct X { int i; };\n"
|
|
"int f(struct X x) { return x.i == x.i; }");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '=='.\n", errout.str());
|
|
|
|
// #5284 - when type is unknown, assume it's float
|
|
check("int f() { return x==x; }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void duplicateExpression3() {
|
|
check("void foo() {\n"
|
|
" if (x() || x()) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("struct A {\n"
|
|
" void foo() const;\n"
|
|
" bool bar() const;\n"
|
|
"};\n"
|
|
"void A::foo() const {\n"
|
|
" if (bar() && bar()) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:6] -> [test.cpp:6]: (style) Same expression on both sides of '&&'.\n", errout.str());
|
|
|
|
check("struct A {\n"
|
|
" void foo();\n"
|
|
" bool bar();\n"
|
|
" bool bar() const;\n"
|
|
"};\n"
|
|
"void A::foo() {\n"
|
|
" if (bar() && bar()) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("class B {\n"
|
|
" void bar(int i);\n"
|
|
"};\n"
|
|
"class A {\n"
|
|
" void bar(int i) const;\n"
|
|
"};\n"
|
|
"void foo() {\n"
|
|
" B b;\n"
|
|
" A a;\n"
|
|
" if (b.bar(1) && b.bar(1)) {}\n"
|
|
" if (a.bar(1) && a.bar(1)) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:11] -> [test.cpp:11]: (style) Same expression on both sides of '&&'.\n", errout.str());
|
|
|
|
check("class D { void strcmp(); };\n"
|
|
"void foo() {\n"
|
|
" D d;\n"
|
|
" if (d.strcmp() && d.strcmp()) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if ((strcmp(a, b) == 0) || (strcmp(a, b) == 0)) {}\n"
|
|
"}", "test.cpp", false, false, false, true, &settings_std);
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '||'.\n", errout.str());
|
|
|
|
check("void GetValue() { return rand(); }\n"
|
|
"void foo() {\n"
|
|
" if ((GetValue() == 0) || (GetValue() == 0)) { dostuff(); }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void __attribute__((const)) GetValue() { return X; }\n"
|
|
"void foo() {\n"
|
|
" if ((GetValue() == 0) || (GetValue() == 0)) { dostuff(); }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:3]: (style) Same expression on both sides of '||'.\n", errout.str());
|
|
|
|
check("void GetValue() __attribute__((const));\n"
|
|
"void GetValue() { return X; }\n"
|
|
"void foo() {\n"
|
|
" if ((GetValue() == 0) || (GetValue() == 0)) { dostuff(); }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4] -> [test.cpp:4]: (style) Same expression on both sides of '||'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (str == \"(\" || str == \"(\") {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '||'.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (bar(a) && !strcmp(a, b) && bar(a) && !strcmp(a, b)) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5334
|
|
check("void f(C *src) {\n"
|
|
" if (x<A*>(src) || x<B*>(src))\n"
|
|
" a++;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(A *src) {\n"
|
|
" if (dynamic_cast<B*>(src) || dynamic_cast<B*>(src)) {}\n"
|
|
"}\n", "test.cpp", false, false, false, false); // don't run simplifications
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '||'.\n", errout.str());
|
|
|
|
// #5819
|
|
check("Vector func(Vector vec1) {\n"
|
|
" return fabs(vec1 & vec1 & vec1);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("Vector func(int vec1) {\n"
|
|
" return fabs(vec1 & vec1 & vec1);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '&'.\n", errout.str());
|
|
|
|
}
|
|
|
|
void duplicateExpression4() {
|
|
check("void foo() {\n"
|
|
" if (*a++ != b || *a++ != b) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if (*a-- != b || *a-- != b) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// assignment
|
|
check("void f() {\n"
|
|
" while (*(a+=2)==*(b+=2) && *(a+=2)==*(b+=2)) {}\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void duplicateExpression5() { // #3749 - macros with same values
|
|
Preprocessor::macroChar = '$';
|
|
check("void f() {\n"
|
|
" if ($a == $a) { }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void duplicateExpression6() { // #4639
|
|
check("float IsNan(float value) { return !(value == value); }\n"
|
|
"double IsNan(double value) { return !(value == value); }\n"
|
|
"long double IsNan(long double value) { return !(value == value); }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void check_signOfUnsignedVariable(const char code[], bool inconclusive=false) {
|
|
// Clear the error buffer..
|
|
errout.str("");
|
|
|
|
Settings settings;
|
|
settings.addEnabled("style");
|
|
settings.inconclusive = inconclusive;
|
|
|
|
// Tokenize..
|
|
Tokenizer tokenizer(&settings, this);
|
|
std::istringstream istr(code);
|
|
tokenizer.tokenize(istr, "test.cpp");
|
|
|
|
// Check for redundant code..
|
|
CheckOther checkOther(&tokenizer, &settings, this);
|
|
checkOther.checkSignOfUnsignedVariable();
|
|
}
|
|
|
|
void checkSignOfUnsignedVariable() {
|
|
check_signOfUnsignedVariable(
|
|
"void foo() {\n"
|
|
" for(unsigned char i = 10; i >= 0; i--)"
|
|
" printf(\"%u\", i);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Unsigned variable 'i' can't be negative so it is unnecessary to test it.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"void foo(bool b) {\n"
|
|
" for(unsigned int i = 10; b || i >= 0; i--)"
|
|
" printf(\"%u\", i);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Unsigned variable 'i' can't be negative so it is unnecessary to test it.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x) {\n"
|
|
" if (x < 0)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Checking if unsigned variable 'x' is less than zero.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x) {\n"
|
|
" if (x < 0)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x) {\n"
|
|
" if (0 > x)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Checking if unsigned variable 'x' is less than zero.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x) {\n"
|
|
" if (0 > x)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x) {\n"
|
|
" if (x >= 0)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Unsigned variable 'x' can't be negative so it is unnecessary to test it.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x) {\n"
|
|
" if (x >= 0)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x, bool y) {\n"
|
|
" if (x < 0 && y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Checking if unsigned variable 'x' is less than zero.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x, bool y) {\n"
|
|
" if (x < 0 && y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x, bool y) {\n"
|
|
" if (0 > x && y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Checking if unsigned variable 'x' is less than zero.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x, bool y) {\n"
|
|
" if (0 > x && y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x, bool y) {\n"
|
|
" if (x >= 0 && y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Unsigned variable 'x' can't be negative so it is unnecessary to test it.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x, bool y) {\n"
|
|
" if (x >= 0 && y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x, bool y) {\n"
|
|
" if (y && x < 0)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Checking if unsigned variable 'x' is less than zero.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x, bool y) {\n"
|
|
" if (y && x < 0)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x, bool y) {\n"
|
|
" if (y && 0 > x)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Checking if unsigned variable 'x' is less than zero.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x, bool y) {\n"
|
|
" if (y && 0 > x)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x, bool y) {\n"
|
|
" if (y && x >= 0)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Unsigned variable 'x' can't be negative so it is unnecessary to test it.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x, bool y) {\n"
|
|
" if (y && x >= 0)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x, bool y) {\n"
|
|
" if (x < 0 || y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Checking if unsigned variable 'x' is less than zero.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x, bool y) {\n"
|
|
" if (x < 0 || y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x, bool y) {\n"
|
|
" if (0 > x || y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Checking if unsigned variable 'x' is less than zero.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x, bool y) {\n"
|
|
" if (0 > x || y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(unsigned int x, bool y) {\n"
|
|
" if (x >= 0 || y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) Unsigned variable 'x' can't be negative so it is unnecessary to test it.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int x, bool y) {\n"
|
|
" if (x >= 0 || y)"
|
|
" return true;\n"
|
|
" return false;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #3233 - FP when template is used (template parameter is numeric constant)
|
|
{
|
|
const char code[] =
|
|
"template<int n> void foo(unsigned int x) {\n"
|
|
" if (x <= n);\n"
|
|
"}\n"
|
|
"foo<0>();";
|
|
check_signOfUnsignedVariable(code, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
check_signOfUnsignedVariable(code, true);
|
|
ASSERT_EQUALS("[test.cpp:2]: (style, inconclusive) Checking if unsigned variable 'x' is less than zero. This might be a false warning.\n", errout.str());
|
|
}
|
|
}
|
|
|
|
void checkSignOfPointer() {
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int* x) {\n"
|
|
" if (x >= 0)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) A pointer can not be negative so it is either pointless or an error to check if it is not.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int* x) {\n"
|
|
" if (*x >= 0)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int* x) {\n"
|
|
" if (x < 0)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) A pointer can not be negative so it is either pointless or an error to check if it is.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int* x) {\n"
|
|
" if (*x < 0)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int* x, int* y) {\n"
|
|
" if (x - y < 0)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int* x, int* y) {\n"
|
|
" if (x - y <= 0)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int* x, int* y) {\n"
|
|
" if (x - y > 0)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int* x, int* y) {\n"
|
|
" if (x - y >= 0)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(Bar* x) {\n"
|
|
" if (0 <= x)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) A pointer can not be negative so it is either pointless or an error to check if it is not.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int* x) {\n"
|
|
" if (0 <= x[0])"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(Bar* x) {\n"
|
|
" if (0 <= x.y)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(Bar* x) {\n"
|
|
" if (0 <= x->y)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(Bar* x, Bar* y) {\n"
|
|
" if (0 <= x->y - y->y )"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(Bar* x) {\n"
|
|
" if (0 > x)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) A pointer can not be negative so it is either pointless or an error to check if it is.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(int* x) {\n"
|
|
" if (0 > x[0])"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(Bar* x) {\n"
|
|
" if (0 > x.y)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"bool foo(Bar* x) {\n"
|
|
" if (0 > x->y)"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"void foo() {\n"
|
|
" int (*t)(void *a, void *b);\n"
|
|
" if (t(a, b) < 0)\n"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"void foo() {\n"
|
|
" int (*t)(void *a, void *b);\n"
|
|
" if (0 > t(a, b))\n"
|
|
" bar();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"struct object_info { int *typep; };\n"
|
|
"void packed_object_info(struct object_info *oi) {\n"
|
|
" if (oi->typep < 0);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) A pointer can not be negative so it is either pointless or an error to check if it is.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"struct object_info { int typep[10]; };\n"
|
|
"void packed_object_info(struct object_info *oi) {\n"
|
|
" if (oi->typep < 0);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) A pointer can not be negative so it is either pointless or an error to check if it is.\n", errout.str());
|
|
|
|
check_signOfUnsignedVariable(
|
|
"struct object_info { int *typep; };\n"
|
|
"void packed_object_info(struct object_info *oi) {\n"
|
|
" if (*oi->typep < 0);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void checkForSuspiciousSemicolon1() {
|
|
check(
|
|
"void foo() {\n"
|
|
" for(int i = 0; i < 10; ++i);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// Empty block
|
|
check(
|
|
"void foo() {\n"
|
|
" for(int i = 0; i < 10; ++i); {\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Suspicious use of ; at the end of 'for' statement.\n", errout.str());
|
|
|
|
check(
|
|
"void foo() {\n"
|
|
" while (!quit); {\n"
|
|
" do_something();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Suspicious use of ; at the end of 'while' statement.\n", errout.str());
|
|
}
|
|
|
|
void checkForSuspiciousSemicolon2() {
|
|
check(
|
|
"void foo() {\n"
|
|
" if (i == 1); {\n"
|
|
" do_something();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Suspicious use of ; at the end of 'if' statement.\n", errout.str());
|
|
|
|
// Seen this in the wild
|
|
check(
|
|
"void foo() {\n"
|
|
" if (Match());\n"
|
|
" do_something();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo() {\n"
|
|
" if (Match());\n"
|
|
" else\n"
|
|
" do_something();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo() {\n"
|
|
" if (i == 1)\n"
|
|
" ;\n"
|
|
" {\n"
|
|
" do_something();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo() {\n"
|
|
" if (i == 1);\n"
|
|
"\n"
|
|
" {\n"
|
|
" do_something();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void checkDoubleFree() {
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" free(p);\n"
|
|
" free(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Memory pointed to by 'p' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p, char *r) {\n"
|
|
" free(p);\n"
|
|
" free(r);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo() {\n"
|
|
" free(p);\n"
|
|
" free(r);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" if (x < 3) free(p);\n"
|
|
" else { if (x > 9) free(p); }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" free(p);\n"
|
|
" getNext(&p);\n"
|
|
" free(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" free(p);\n"
|
|
" bar();\n"
|
|
" free(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Memory pointed to by 'p' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" free(p);\n"
|
|
" printf(\"Freed memory at location %x\", p);\n"
|
|
" free(p);\n"
|
|
"}", nullptr, false, false, false, true, &settings_std);
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Memory pointed to by 'p' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(DIR *p) {\n"
|
|
" closedir(p);\n"
|
|
" closedir(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Directory handle 'p' closed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(DIR *p, DIR *r) {\n"
|
|
" closedir(p);\n"
|
|
" closedir(r);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(DIR *p) {\n"
|
|
" if (x < 3) closedir(p);\n"
|
|
" else { if (x > 9) closedir(p); }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(DIR *p) {\n"
|
|
" closedir(p);\n"
|
|
" gethandle(&p);\n"
|
|
" closedir(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(DIR *p) {\n"
|
|
" closedir(p);\n"
|
|
" gethandle();\n"
|
|
" closedir(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Directory handle 'p' closed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(Data* p) {\n"
|
|
" free(p->a);\n"
|
|
" free(p->b);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void f() {\n"
|
|
" char *p; p = malloc(100);\n"
|
|
" if (x) {\n"
|
|
" free(p);\n"
|
|
" exit();\n"
|
|
" }\n"
|
|
" free(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void f() {\n"
|
|
" char *p; p = malloc(100);\n"
|
|
" if (x) {\n"
|
|
" free(p);\n"
|
|
" x = 0;\n"
|
|
" }\n"
|
|
" free(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:7]: (error) Memory pointed to by 'p' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void f() {\n"
|
|
" char *p; p = do_something();\n"
|
|
" free(p);\n"
|
|
" p = do_something();\n"
|
|
" free(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" g_free(p);\n"
|
|
" g_free(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Memory pointed to by 'p' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p, char *r) {\n"
|
|
" g_free(p);\n"
|
|
" g_free(r);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" g_free(p);\n"
|
|
" getNext(&p);\n"
|
|
" g_free(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" g_free(p);\n"
|
|
" bar();\n"
|
|
" g_free(p);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Memory pointed to by 'p' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" delete p;\n"
|
|
" delete p;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Memory pointed to by 'p' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p, char *r) {\n"
|
|
" delete p;\n"
|
|
" delete r;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" delete p;\n"
|
|
" getNext(&p);\n"
|
|
" delete p;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" delete p;\n"
|
|
" bar();\n"
|
|
" delete p;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Memory pointed to by 'p' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" delete[] p;\n"
|
|
" delete[] p;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Memory pointed to by 'p' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p, char *r) {\n"
|
|
" delete[] p;\n"
|
|
" delete[] r;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" delete[] p;\n"
|
|
" getNext(&p);\n"
|
|
" delete[] p;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" delete[] p;\n"
|
|
" bar();\n"
|
|
" delete[] p;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Memory pointed to by 'p' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"~LineMarker() {\n"
|
|
" delete pxpm;\n"
|
|
"}\n"
|
|
"LineMarker &operator=(const LineMarker &) {\n"
|
|
" delete pxpm;\n"
|
|
" pxpm = NULL;\n"
|
|
" return *this;\n"
|
|
"}"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo()\n"
|
|
"{\n"
|
|
" int* ptr; ptr = NULL;\n"
|
|
" try\n"
|
|
" {\n"
|
|
" ptr = new int(4);\n"
|
|
" }\n"
|
|
" catch(...)\n"
|
|
" {\n"
|
|
" delete ptr;\n"
|
|
" throw;\n"
|
|
" }\n"
|
|
" delete ptr;\n"
|
|
"}"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"int foo()\n"
|
|
"{\n"
|
|
" int* a; a = new int;\n"
|
|
" bool doDelete; doDelete = true;\n"
|
|
" if (a != 0)\n"
|
|
" {\n"
|
|
" doDelete = false;\n"
|
|
" delete a;\n"
|
|
" }\n"
|
|
" if(doDelete)\n"
|
|
" delete a;\n"
|
|
" return 0;\n"
|
|
"}"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(int y)\n"
|
|
"{\n"
|
|
" char * x; x = NULL;\n"
|
|
" while(true) {\n"
|
|
" x = new char[100];\n"
|
|
" if (y++ > 100)\n"
|
|
" break;\n"
|
|
" delete[] x;\n"
|
|
" }\n"
|
|
" delete[] x;\n"
|
|
"}"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(int y)\n"
|
|
"{\n"
|
|
" char * x; x = NULL;\n"
|
|
" for (int i = 0; i < 10000; i++) {\n"
|
|
" x = new char[100];\n"
|
|
" delete[] x;\n"
|
|
" }\n"
|
|
" delete[] x;\n"
|
|
"}"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:8]: (error) Memory pointed to by 'x' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(int y)\n"
|
|
"{\n"
|
|
" char * x; x = NULL;\n"
|
|
" while (isRunning()) {\n"
|
|
" x = new char[100];\n"
|
|
" delete[] x;\n"
|
|
" }\n"
|
|
" delete[] x;\n"
|
|
"}"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:8]: (error) Memory pointed to by 'x' is freed twice.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(int y)\n"
|
|
"{\n"
|
|
" char * x; x = NULL;\n"
|
|
" while (isRunning()) {\n"
|
|
" x = malloc(100);\n"
|
|
" free(x);\n"
|
|
" }\n"
|
|
" free(x);\n"
|
|
"}"
|
|
);
|
|
TODO_ASSERT_EQUALS("[test.cpp:8]: (error) Memory pointed to by 'x' is freed twice.\n", "", errout.str());
|
|
|
|
check(
|
|
"void foo(int y)\n"
|
|
"{\n"
|
|
" char * x; x = NULL;\n"
|
|
" for (;;) {\n"
|
|
" x = new char[100];\n"
|
|
" if (y++ > 100)\n"
|
|
" break;\n"
|
|
" delete[] x;\n"
|
|
" }\n"
|
|
" delete[] x;\n"
|
|
"}"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(int y)\n"
|
|
"{\n"
|
|
" char * x; x = NULL;\n"
|
|
" do {\n"
|
|
" x = new char[100];\n"
|
|
" if (y++ > 100)\n"
|
|
" break;\n"
|
|
" delete[] x;\n"
|
|
" } while (true);\n"
|
|
" delete[] x;\n"
|
|
"}"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void f()\n"
|
|
"{\n"
|
|
" char *p; p = 0;\n"
|
|
" if (x < 100) {\n"
|
|
" p = malloc(10);\n"
|
|
" free(p);\n"
|
|
" }\n"
|
|
" free(p);\n"
|
|
"}"
|
|
);
|
|
TODO_ASSERT_EQUALS("[test.cpp:8]: (error) Memory pointed to by 'p' is freed twice.\n", "", errout.str());
|
|
|
|
check(
|
|
"void MyFunction()\n"
|
|
"{\n"
|
|
" char* data; data = new char[100];\n"
|
|
" try\n"
|
|
" {\n"
|
|
" }\n"
|
|
" catch(err)\n"
|
|
" {\n"
|
|
" delete[] data;\n"
|
|
" MyThrow(err);\n"
|
|
" }\n"
|
|
" delete[] data;\n"
|
|
"}\n"
|
|
|
|
"void MyThrow(err)\n"
|
|
"{\n"
|
|
" throw(err);\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void MyFunction()\n"
|
|
"{\n"
|
|
" char* data; data = new char[100];\n"
|
|
" try\n"
|
|
" {\n"
|
|
" }\n"
|
|
" catch(err)\n"
|
|
" {\n"
|
|
" delete[] data;\n"
|
|
" MyExit(err);\n"
|
|
" }\n"
|
|
" delete[] data;\n"
|
|
"}\n"
|
|
|
|
"void MyExit(err)\n"
|
|
"{\n"
|
|
" exit(err);\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
}
|
|
|
|
|
|
void checkInvalidFree() {
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" char *a; a = malloc(1024);\n"
|
|
" free(a + 10);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Invalid memory address freed.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" char *a; a = malloc(1024);\n"
|
|
" free(a - 10);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Invalid memory address freed.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" char *a; a = malloc(1024);\n"
|
|
" free(10 + a);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Invalid memory address freed.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" char *a; a = new char[1024];\n"
|
|
" delete[] (a + 10);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Invalid memory address freed.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" char *a; a = new char;\n"
|
|
" delete a + 10;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Invalid memory address freed.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" char *a; a = new char;\n"
|
|
" bar(a);\n"
|
|
" delete a + 10;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" char *a; a = new char;\n"
|
|
" char *b; b = new char;\n"
|
|
" bar(a);\n"
|
|
" delete a + 10;\n"
|
|
" delete b + 10;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:6]: (error) Invalid memory address freed.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" char *a; a = new char;\n"
|
|
" char *b; b = new char;\n"
|
|
" bar(a, b);\n"
|
|
" delete a + 10;\n"
|
|
" delete b + 10;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check(
|
|
"void foo(char *p) {\n"
|
|
" char *a; a = new char;\n"
|
|
" bar()\n"
|
|
" delete a + 10;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Invalid memory address freed.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(size_t xx) {\n"
|
|
" char *ptr; ptr = malloc(42);\n"
|
|
" ptr += xx;\n"
|
|
" free(ptr - xx - 1);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error, inconclusive) Invalid memory address freed.\n", errout.str());
|
|
|
|
check(
|
|
"void foo(size_t xx) {\n"
|
|
" char *ptr; ptr = malloc(42);\n"
|
|
" std::cout << ptr;\n"
|
|
" ptr = otherPtr;\n"
|
|
" free(otherPtr - xx - 1);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void check_redundant_copy(const char code[], bool inconclusive = true) {
|
|
// Clear the error buffer..
|
|
errout.str("");
|
|
|
|
Settings settings;
|
|
settings.addEnabled("performance");
|
|
settings.inconclusive = inconclusive;
|
|
|
|
// Tokenize..
|
|
Tokenizer tokenizer(&settings, this);
|
|
std::istringstream istr(code);
|
|
tokenizer.tokenize(istr, "test.cpp");
|
|
|
|
// Simplify token list..
|
|
CheckOther checkOther(&tokenizer, &settings, this);
|
|
tokenizer.simplifyTokenList2();
|
|
checkOther.checkRedundantCopy();
|
|
}
|
|
void checkRedundantCopy() {
|
|
check_redundant_copy("const std::string& getA(){static std::string a;return a;}\n"
|
|
"void foo() {\n"
|
|
" const std::string a = getA();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (performance, inconclusive) Use const reference for 'a' to avoid unnecessary data copying.\n", errout.str());
|
|
|
|
check_redundant_copy("class A{public:A(){}};\n"
|
|
"const A& getA(){static A a;return a;}\n"
|
|
"int main()\n"
|
|
"{\n"
|
|
" const A a = getA();\n"
|
|
" return 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5]: (performance, inconclusive) Use const reference for 'a' to avoid unnecessary data copying.\n", errout.str());
|
|
|
|
check_redundant_copy("const int& getA(){static int a;return a;}\n"
|
|
"int main()\n"
|
|
"{\n"
|
|
" const int a = getA();\n"
|
|
" return 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_redundant_copy("const int& getA(){static int a;return a;}\n"
|
|
"int main()\n"
|
|
"{\n"
|
|
" int getA = 0;\n"
|
|
" const int a = getA + 3;\n"
|
|
" return 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_redundant_copy("class A{public:A(){}};\n"
|
|
"const A& getA(){static A a;return a;}\n"
|
|
"int main()\n"
|
|
"{\n"
|
|
" const A a(getA());\n"
|
|
" return 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5]: (performance, inconclusive) Use const reference for 'a' to avoid unnecessary data copying.\n", errout.str());
|
|
|
|
check_redundant_copy("const int& getA(){static int a;return a;}\n"
|
|
"int main()\n"
|
|
"{\n"
|
|
" const int a(getA());\n"
|
|
" return 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_redundant_copy("class A{\n"
|
|
"public:A(int a=0){_a = a;}\n"
|
|
"A operator+(const A & a){return A(_a+a._a);}\n"
|
|
"private:int _a;};\n"
|
|
"const A& getA(){static A a;return a;}\n"
|
|
"int main()\n"
|
|
"{\n"
|
|
" const A a = getA() + 1;\n"
|
|
" return 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check_redundant_copy("class A{\n"
|
|
"public:A(int a=0){_a = a;}\n"
|
|
"A operator+(const A & a){return A(_a+a._a);}\n"
|
|
"private:int _a;};\n"
|
|
"const A& getA(){static A a;return a;}\n"
|
|
"int main()\n"
|
|
"{\n"
|
|
" const A a(getA()+1);\n"
|
|
" return 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5190 - FP when creating object with constructor that takes a reference
|
|
check_redundant_copy("class A {};\n"
|
|
"class B { B(const A &a); };\n"
|
|
"const A &getA();\n"
|
|
"void f() {\n"
|
|
" const B b(getA());\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5618
|
|
const char* code5618 = "class Token {\n"
|
|
"public:\n"
|
|
" const std::string& str();\n"
|
|
"};\n"
|
|
"void simplifyArrayAccessSyntax() {\n"
|
|
" for (Token *tok = list.front(); tok; tok = tok->next()) {\n"
|
|
" const std::string temp = tok->str();\n"
|
|
" tok->str(tok->strAt(2));\n"
|
|
" }\n"
|
|
"}";
|
|
check_redundant_copy(code5618);
|
|
TODO_ASSERT_EQUALS("", "[test.cpp:7]: (performance, inconclusive) Use const reference for 'temp' to avoid unnecessary data copying.\n", errout.str());
|
|
check_redundant_copy(code5618, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5890 - crash: wesnoth desktop_util.cpp / unicode.hpp
|
|
check_redundant_copy("typedef std::vector<char> X;\n"
|
|
"X f<X>(const X &in) {\n"
|
|
" const X s = f<X>(in);\n"
|
|
" return f<X>(s);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void checkNegativeShift() {
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int a; a = 123;\n"
|
|
" a << -1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Shifting by a negative value is undefined behaviour\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int a; a = 123;\n"
|
|
" a >> -1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Shifting by a negative value is undefined behaviour\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int a; a = 123;\n"
|
|
" a <<= -1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Shifting by a negative value is undefined behaviour\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int a; a = 123;\n"
|
|
" a >>= -1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4]: (error) Shifting by a negative value is undefined behaviour\n", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << -1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << a << -1 ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << 3 << -1 ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void incompleteArrayFill() {
|
|
check("void f() {\n"
|
|
" int a[5];\n"
|
|
" memset(a, 123, 5);\n"
|
|
" memcpy(a, b, 5);\n"
|
|
" memmove(a, b, 5);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4] -> [test.cpp:5]: (performance) Buffer 'a' is being written before its old content has been used.\n"
|
|
"[test.cpp:3]: (warning, inconclusive) Array 'a' is filled incompletely. Did you forget to multiply the size given to 'memset()' with 'sizeof(*a)'?\n"
|
|
"[test.cpp:4]: (warning, inconclusive) Array 'a' is filled incompletely. Did you forget to multiply the size given to 'memcpy()' with 'sizeof(*a)'?\n"
|
|
"[test.cpp:5]: (warning, inconclusive) Array 'a' is filled incompletely. Did you forget to multiply the size given to 'memmove()' with 'sizeof(*a)'?\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" Foo* a[5];\n"
|
|
" memset(a, 'a', 5);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning, inconclusive) Array 'a' is filled incompletely. Did you forget to multiply the size given to 'memset()' with 'sizeof(*a)'?\n", errout.str());
|
|
|
|
check("class Foo {int a; int b;};\n"
|
|
"void f() {\n"
|
|
" Foo a[5];\n"
|
|
" memset(a, 'a', 5);\n"
|
|
"}");
|
|
TODO_ASSERT_EQUALS("[test.cpp:3]: (warning, inconclusive) Array 'a' is filled incompletely. Did you forget to multiply the size given to 'memset()' with 'sizeof(*a)'?\n", "", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" Foo a[5];\n" // Size of foo is unknown
|
|
" memset(a, 'a', 5);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" char a[5];\n"
|
|
" memset(a, 'a', 5);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int a[5];\n"
|
|
" memset(a+15, 'a', 5);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" bool a[5];\n"
|
|
" memset(a, false, 5);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (portability, inconclusive) Array 'a' might be filled incompletely. Did you forget to multiply the size given to 'memset()' with 'sizeof(*a)'?\n", errout.str());
|
|
}
|
|
|
|
void redundantVarAssignment() {
|
|
// Simple tests
|
|
check("void f(int i) {\n"
|
|
" i = 1;\n"
|
|
" i = 1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:3]: (performance) Variable 'i' is reassigned a value before the old one has been used.\n", errout.str());
|
|
|
|
{
|
|
// non-local variable => only show warning when inconclusive is used
|
|
const char code[] = "int i;\n"
|
|
"void f() {\n"
|
|
" i = 1;\n"
|
|
" i = 1;\n"
|
|
"}";
|
|
check(code, "test.cpp", false, false); // inconclusive = false
|
|
ASSERT_EQUALS("", errout.str());
|
|
check(code, "test.cpp", false, true); // inconclusive = true
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:4]: (performance, inconclusive) Variable 'i' is reassigned a value before the old one has been used if variable is no semaphore variable.\n", errout.str());
|
|
}
|
|
|
|
check("void f() {\n"
|
|
" int i;\n"
|
|
" i = 1;\n"
|
|
" i = 1;\n"
|
|
"}", nullptr, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:4]: (performance) Variable 'i' is reassigned a value before the old one has been used.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" static int i;\n"
|
|
" i = 1;\n"
|
|
" i = 1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:4]: (performance, inconclusive) Variable 'i' is reassigned a value before the old one has been used if variable is no semaphore variable.\n", errout.str());
|
|
|
|
// Testing different types
|
|
check("void f() {\n"
|
|
" Foo& bar = foo();\n"
|
|
" bar = x;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" Foo& bar = foo();\n"
|
|
" bar = x;\n"
|
|
" bar = y;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:4]: (performance, inconclusive) Variable 'bar' is reassigned a value before the old one has been used if variable is no semaphore variable.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" Foo& bar = foo();\n" // #4425. bar might refer to something global, etc.
|
|
" bar = y();\n"
|
|
" foo();\n"
|
|
" bar = y();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// Tests with function call between assignment
|
|
check("void f(int i) {\n"
|
|
" i = 1;\n"
|
|
" bar();\n"
|
|
" i = 1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:4]: (performance) Variable 'i' is reassigned a value before the old one has been used.\n", errout.str());
|
|
|
|
check("int i;\n"
|
|
"void f() {\n"
|
|
" i = 1;\n"
|
|
" bar();\n" // Global variable might be accessed in bar()
|
|
" i = 1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" static int i;\n"
|
|
" i = 1;\n"
|
|
" bar();\n" // bar() might call f() recursively. This could be a false positive in more complex examples (when value of i is used somewhere. See #4229)
|
|
" i = 2;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int i;\n"
|
|
" i = 1;\n"
|
|
" bar();\n"
|
|
" i = 1;\n"
|
|
"}", nullptr, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:5]: (performance) Variable 'i' is reassigned a value before the old one has been used.\n", errout.str());
|
|
|
|
check("void bar(int i) {}\n"
|
|
"void f(int i) {\n"
|
|
" i = 1;\n"
|
|
" bar(i);\n" // Passed as argument
|
|
" i = 1;\n"
|
|
"}", nullptr, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" Foo bar = foo();\n"
|
|
" bar();\n" // #5568. operator() called
|
|
" bar = y();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// Branch tests
|
|
check("void f(int i) {\n"
|
|
" i = 1;\n"
|
|
" if(x)\n"
|
|
" i = 0;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(int i) {\n"
|
|
" if(x)\n"
|
|
" i = 0;\n"
|
|
" i = 1;\n"
|
|
" i = 2;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:4] -> [test.cpp:5]: (performance) Variable 'i' is reassigned a value before the old one has been used.\n", errout.str());
|
|
|
|
// #4513
|
|
check("int x;\n"
|
|
"int g() {\n"
|
|
" return x*x;\n"
|
|
"}\n"
|
|
"void f() {\n"
|
|
" x = 2;\n"
|
|
" x = g();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int g() {\n"
|
|
" return x*x;\n"
|
|
"}\n"
|
|
"void f(int x) {\n"
|
|
" x = 2;\n"
|
|
" x = g();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:6]: (performance) Variable 'x' is reassigned a value before the old one has been used.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" Foo& bar = foo();\n"
|
|
" bar = x;\n"
|
|
" bar = y();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("class C {\n"
|
|
" int x;\n"
|
|
" void g() { return x*x; }\n"
|
|
" void f();\n"
|
|
"};\n"
|
|
"\n"
|
|
"void C::f() {\n"
|
|
" x = 2;\n"
|
|
" x = g();\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("class C {\n"
|
|
" int x;\n"
|
|
" void g() { return x*x; }\n"
|
|
" void f();\n"
|
|
"};\n"
|
|
"\n"
|
|
"void C::f(Foo z) {\n"
|
|
" x = 2;\n"
|
|
" x = z.g();\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:8] -> [test.cpp:9]: (performance, inconclusive) Variable 'x' is reassigned a value before the old one has been used if variable is no semaphore variable.\n", errout.str());
|
|
|
|
// from #3103 (avoid a false negative)
|
|
check("int foo(){\n"
|
|
" int x;\n"
|
|
" x = 1;\n"
|
|
" x = 1;\n"
|
|
" return x + 1;\n"
|
|
"}", nullptr, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:4]: (performance) Variable 'x' is reassigned a value before the old one has been used.\n", errout.str());
|
|
|
|
// from #3103 (avoid a false positive)
|
|
check("int foo(){\n"
|
|
" int x;\n"
|
|
" x = 1;\n"
|
|
" if (y)\n" // <-- cppcheck does not know anything about 'y'
|
|
" x = 2;\n"
|
|
" return x + 1;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n" // Ticket #4356
|
|
" int x = 0;\n" // <- ignore assignment with 0
|
|
" x = 3;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int i = 54;\n"
|
|
" i = 0;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:3]: (performance) Variable 'i' is reassigned a value before the old one has been used.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int i = 54;\n"
|
|
" i = 1;\n"
|
|
"}", 0, false, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:3]: (performance) Variable 'i' is reassigned a value before the old one has been used.\n", errout.str());
|
|
|
|
check("int foo() {\n" // #4420
|
|
" int x;\n"
|
|
" bar(++x);\n"
|
|
" x = 5;\n"
|
|
" return bar(x);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// struct member..
|
|
check("struct AB { int a; int b; };\n"
|
|
"\n"
|
|
"int f() {\n"
|
|
" struct AB ab;\n"
|
|
" ab.a = 1;\n"
|
|
" ab.a = 2;\n"
|
|
" return ab.a;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5] -> [test.cpp:6]: (performance, inconclusive) Variable 'a' is reassigned a value before the old one has been used if variable is no semaphore variable.\n", errout.str());
|
|
|
|
check("struct AB { int a; int b; };\n"
|
|
"\n"
|
|
"int f() {\n"
|
|
" struct AB ab;\n"
|
|
" ab.a = 1;\n"
|
|
" ab = do_something();\n"
|
|
" return ab.a;\n"
|
|
"}");
|
|
TODO_ASSERT_EQUALS("error", "", errout.str());
|
|
|
|
check("struct AB { int a; int b; };\n"
|
|
"\n"
|
|
"int f() {\n"
|
|
" struct AB ab;\n"
|
|
" ab.a = 1;\n"
|
|
" do_something(&ab);\n"
|
|
" ab.a = 2;\n"
|
|
" return ab.a;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("struct AB { int a; int b; };\n"
|
|
"\n"
|
|
"int f(DO_SOMETHING do_something) {\n"
|
|
" struct AB ab;\n"
|
|
" ab.a = 1;\n"
|
|
" do_something(&ab);\n"
|
|
" ab.a = 2;\n"
|
|
" return ab.a;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("struct AB { int a; int b; };\n"
|
|
"\n"
|
|
"int f(struct AB *ab) {\n"
|
|
" ab->a = 1;\n"
|
|
" ab->b = 2;\n"
|
|
" ab++;\n"
|
|
" ab->a = 1;\n"
|
|
" ab->b = 2;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("struct AB { int a; int b; };\n"
|
|
"\n"
|
|
"int f(struct AB *ab) {\n"
|
|
" ab->a = 1;\n"
|
|
" ab->b = 2;\n"
|
|
" ab = x;\n"
|
|
" ab->a = 1;\n"
|
|
" ab->b = 2;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(struct AB *ab) {\n" // #
|
|
" ab->data->x = 1;\n"
|
|
" ab = &ab1;\n"
|
|
" ab->data->x = 2;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #5964
|
|
check("void func(char *buffer, const char *format, int precision, unsigned value) {\n"
|
|
" (precision < 0) ? sprintf(buffer, format, value) : sprintf(buffer, format, precision, value);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// don't crash
|
|
check("struct data {\n"
|
|
" struct { int i; } fc;\n"
|
|
"};\n"
|
|
"struct state {\n"
|
|
" struct data d[123];\n"
|
|
"};\n"
|
|
"void func(struct state *s) {\n"
|
|
" s->foo[s->x++] = 2;\n"
|
|
" s->d[1].fc.i++;\n"
|
|
"}");
|
|
}
|
|
|
|
void redundantMemWrite() {
|
|
// Simple tests
|
|
check("void f(void* a) {\n"
|
|
" memcpy(a, foo, bar);\n"
|
|
" memset(a, 0, bar);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:3]: (performance) Buffer 'a' is being written before its old content has been used.\n", errout.str());
|
|
|
|
check("void* a;\n"
|
|
"void f() {\n"
|
|
" strcpy(a, foo);\n"
|
|
" strncpy(a, 0, bar);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:4]: (performance) Buffer 'a' is being written before its old content has been used.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" void* a = foo();\n"
|
|
" sprintf(a, foo);\n"
|
|
" memmove(a, 0, bar);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:4]: (performance) Buffer 'a' is being written before its old content has been used.\n", errout.str());
|
|
|
|
// Writing to different parts of a buffer
|
|
check("void f(void* a) {\n"
|
|
" memcpy(a, foo, bar);\n"
|
|
" memset(a+5, 0, bar);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// Use variable as second argument
|
|
check("void f(void* a, void* b) {\n"
|
|
" memset(a, 0, 5);\n"
|
|
" memcpy(b, a, 5);\n"
|
|
" memset(a, 1, 5);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// strcat is special
|
|
check("void f(void* a) {\n"
|
|
" strcpy(a, foo);\n"
|
|
" strcat(a, bar);\n" // Not redundant
|
|
" strcpy(a, x);\n" // Redundant
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:4]: (performance) Buffer 'a' is being written before its old content has been used.\n", errout.str());
|
|
|
|
// Tests with function call between copy
|
|
check("void f(void* a) {\n"
|
|
" snprintf(a, foo, bar);\n"
|
|
" bar();\n"
|
|
" memset(a, 0, size);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:4]: (performance) Buffer 'a' is being written before its old content has been used.\n", errout.str());
|
|
|
|
check("void* a;\n"
|
|
"void f() {\n"
|
|
" memset(a, 0, size);\n"
|
|
" bar();\n" // Global variable might be accessed in bar()
|
|
" memset(a, 0, size);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" void* a = foo();\n"
|
|
" memset(a, 0, size);\n"
|
|
" bar();\n"
|
|
" memset(a, 0, size);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:5]: (performance) Buffer 'a' is being written before its old content has been used.\n", errout.str());
|
|
|
|
check("void bar(void* a) {}\n"
|
|
"void f(void* a) {\n"
|
|
" memset(a, 0, size);\n"
|
|
" bar(a);\n" // Passed as argument
|
|
" memset(a, 0, size);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// Branch tests
|
|
check("void f(void* a) {\n"
|
|
" memset(a, 0, size);\n"
|
|
" if(x)\n"
|
|
" memset(a, 0, size);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #4455 - initialization of local buffer
|
|
check("void f(void) {"
|
|
" char buf[10];\n"
|
|
" memset(buf, 0, 10);\n"
|
|
" strcpy(buf, string);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(void) {\n"
|
|
" char buf[10] = {0};\n"
|
|
" memset(buf, 0, 10);\n"
|
|
" strcpy(buf, string);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3] -> [test.cpp:4]: (performance) Buffer 'buf' is being written before its old content has been used.\n", errout.str());
|
|
|
|
// #5689 - use return value of strcpy
|
|
check("int f(void* a) {\n"
|
|
" int i = atoi(strcpy(a, foo));\n"
|
|
" strncpy(a, 0, bar);\n"
|
|
" return i;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varFuncNullUB() { // #4482
|
|
check("void a(...);\n"
|
|
"void b() { a(NULL); }");
|
|
ASSERT_EQUALS("[test.cpp:2]: (portability) Passing NULL after the last typed argument to a variadic function leads to undefined behaviour.\n", errout.str());
|
|
|
|
check("void a(char *p, ...);\n"
|
|
"void b() { a(NULL, 2); }");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void checkPipeParameterSize() { // #3521
|
|
check("void f(){\n"
|
|
"int pipefd[1];\n" // <-- array of two integers is needed
|
|
"if (pipe(pipefd) == -1) {\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}",nullptr,false,false,true);
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer 'pipefd' must have size of 2 integers if used as parameter of pipe().\n", errout.str());
|
|
|
|
check("void f(){\n"
|
|
"int pipefd[2];\n"
|
|
"if (pipe(pipefd) == -1) {\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}",nullptr,false,false,true);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(){\n"
|
|
"int pipefd[20];\n"
|
|
"if (pipe(pipefd) == -1) {\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}",nullptr,false,false,true);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(){\n"
|
|
"int pipefd[1];\n" // <-- array of two integers is needed
|
|
"if (pipe2(pipefd,0) == -1) {\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}",nullptr,false,false,true);
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Buffer 'pipefd' must have size of 2 integers if used as parameter of pipe().\n", errout.str());
|
|
|
|
check("void f(){\n"
|
|
"int pipefd[2];\n"
|
|
"if (pipe2(pipefd,0) == -1) {\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}",nullptr,false,false,true);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(){\n"
|
|
"int pipefd[20];\n"
|
|
"if (pipe2(pipefd,0) == -1) {\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}",nullptr,false,false,true);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// avoid crash with pointer variable
|
|
check("void foo (int* arrayPtr)\n"
|
|
"{\n"
|
|
" if (pipe (arrayPtr) < 0)\n"
|
|
" {}\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// avoid crash with pointer variable - for local variable on stack as well - see #4801
|
|
check("void foo {\n"
|
|
" int *cp;\n"
|
|
" if ( pipe (cp) == -1 ) {\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// test with unknown variable
|
|
check("void foo {\n"
|
|
" if ( pipe (cp) == -1 ) {\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// avoid crash with pointer variable - for local variable on stack as well - see #4801
|
|
check("void foo {\n"
|
|
" int *cp;\n"
|
|
" if ( pipe (cp) == -1 ) {\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// test with unknown variable
|
|
check("void foo {\n"
|
|
" if ( pipe (cp) == -1 ) {\n"
|
|
" return;\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
}
|
|
|
|
void checkCastIntToCharAndBack() { // #160
|
|
|
|
// check getchar
|
|
check("void f() {\n"
|
|
"unsigned char c; c = getchar();\n"
|
|
" while( c != EOF)\n"
|
|
" {\n"
|
|
" bar(c);\n"
|
|
" c = getchar();\n"
|
|
" } ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Storing getchar() return value in char variable and then comparing with EOF.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
"unsigned char c = getchar();\n"
|
|
" while( EOF != c)\n"
|
|
" {\n"
|
|
" bar(c);\n"
|
|
" } ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Storing getchar() return value in char variable and then comparing with EOF.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" unsigned char c; c = getchar();\n"
|
|
" while( EOF != c )\n"
|
|
" {\n"
|
|
" bar(c);\n"
|
|
" c = getchar();\n"
|
|
" } ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Storing getchar() return value in char variable and then comparing with EOF.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int i; i = getchar();\n"
|
|
" while( i != EOF)\n"
|
|
" {\n"
|
|
" bar(i);\n"
|
|
" i = getchar();\n"
|
|
" } ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int i; i = getchar();\n"
|
|
" while( EOF != i )\n"
|
|
" {\n"
|
|
" bar(i);\n"
|
|
" i = getchar();\n"
|
|
" } ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
// check getc
|
|
check("voif f (FILE * pFile){\n"
|
|
"unsigned char c;\n"
|
|
"do {\n"
|
|
" c = getc (pFile);\n"
|
|
"} while (c != EOF)"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5]: (warning) Storing getc() return value in char variable and then comparing with EOF.\n", errout.str());
|
|
|
|
check("voif f (FILE * pFile){\n"
|
|
"unsigned char c;\n"
|
|
"do {\n"
|
|
" c = getc (pFile);\n"
|
|
"} while (EOF != c)"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5]: (warning) Storing getc() return value in char variable and then comparing with EOF.\n", errout.str());
|
|
|
|
check("voif f (FILE * pFile){\n"
|
|
"int i;\n"
|
|
"do {\n"
|
|
" i = getc (pFile);\n"
|
|
"} while (i != EOF)"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("voif f (FILE * pFile){\n"
|
|
"int i;\n"
|
|
"do {\n"
|
|
" i = getc (pFile);\n"
|
|
"} while (EOF != i)"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
// check fgetc
|
|
check("voif f (FILE * pFile){\n"
|
|
"unsigned char c;\n"
|
|
"do {\n"
|
|
" c = fgetc (pFile);\n"
|
|
"} while (c != EOF)"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5]: (warning) Storing fgetc() return value in char variable and then comparing with EOF.\n", errout.str());
|
|
|
|
check("voif f (FILE * pFile){\n"
|
|
"char c;\n"
|
|
"do {\n"
|
|
" c = fgetc (pFile);\n"
|
|
"} while (EOF != c)"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:5]: (warning) Storing fgetc() return value in char variable and then comparing with EOF.\n", errout.str());
|
|
|
|
check("voif f (FILE * pFile){\n"
|
|
"signed char c;\n"
|
|
"do {\n"
|
|
" c = fgetc (pFile);\n"
|
|
"} while (EOF != c)"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("voif f (FILE * pFile){\n"
|
|
"int i;\n"
|
|
"do {\n"
|
|
" i = fgetc (pFile);\n"
|
|
"} while (i != EOF)"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("voif f (FILE * pFile){\n"
|
|
"int i;\n"
|
|
"do {\n"
|
|
" i = fgetc (pFile);\n"
|
|
"} while (EOF != i)"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// cin.get()
|
|
check("void f(){\n"
|
|
" char ch; ch = std::cin.get();\n"
|
|
" while (EOF != ch) {\n"
|
|
" std::cout << ch;\n"
|
|
" ch = std::cin.get();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Storing cin.get() return value in char variable and then comparing with EOF.\n", errout.str());
|
|
|
|
check("void f(){\n"
|
|
" char ch; ch = std::cin.get();\n"
|
|
" while (ch != EOF) {\n"
|
|
" std::cout << ch;\n"
|
|
" ch = std::cin.get();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Storing cin.get() return value in char variable and then comparing with EOF.\n", errout.str());
|
|
|
|
check("void f(){\n"
|
|
" int i; i = std::cin.get();\n"
|
|
" while ( EOF != i ) {\n"
|
|
" std::cout << i;\n"
|
|
" i = std::cin.get();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(){\n"
|
|
" int i; i = std::cin.get();\n"
|
|
" while ( i != EOF ) {\n"
|
|
" std::cout << i;\n"
|
|
" i = std::cin.get();\n"
|
|
" }\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void checkSleepTimeIntervall() {
|
|
// check usleep(), which is allowed to be called with in a range of [0,999999]
|
|
check("void f(){\n"
|
|
"usleep(10000);\n"
|
|
"}",nullptr,false,false,true);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(){\n"
|
|
"usleep(999999);\n"
|
|
"}",nullptr,false,false,true);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(){\n"
|
|
"usleep(1000000);\n"
|
|
"}",nullptr,false,false,true);
|
|
ASSERT_EQUALS("[test.cpp:2]: (error) Invalid usleep() argument nr 1. The value is 1000000 but the valid values are '0:999999'.\n", errout.str());
|
|
|
|
check("void f(){\n"
|
|
"usleep(1000001);\n"
|
|
"}",nullptr,false,false,true);
|
|
ASSERT_EQUALS("[test.cpp:2]: (error) Invalid usleep() argument nr 1. The value is 1000001 but the valid values are '0:999999'.\n", errout.str());
|
|
}
|
|
|
|
void checkCommaSeparatedReturn() {
|
|
check("int fun(int a) {\n"
|
|
" if (a < 0)\n"
|
|
" return a++,\n"
|
|
" do_something();\n"
|
|
"}", nullptr, true, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Comma is used in return statement. The comma can easily be misread as a ';'.\n", errout.str());
|
|
|
|
check("int fun(int a) {\n"
|
|
" if (a < 0)\n"
|
|
" return a++, do_something();\n"
|
|
"}", nullptr, true, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int fun(int a) {\n"
|
|
" if (a < 0)\n"
|
|
" return a+5,\n"
|
|
" do_something();\n"
|
|
"}", nullptr, true, false, false, false);
|
|
ASSERT_EQUALS("[test.cpp:3]: (style) Comma is used in return statement. The comma can easily be misread as a ';'.\n", errout.str());
|
|
|
|
check("int fun(int a) {\n"
|
|
" if (a < 0)\n"
|
|
" return a+5, do_something();\n"
|
|
"}", nullptr, true, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int fun(int a) {\n"
|
|
" if (a < 0)\n"
|
|
" return c<int,\nint>::b;\n"
|
|
"}", nullptr, true, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// ticket #4927 Segfault in CheckOther::checkCommaSeparatedReturn() on invalid code
|
|
check("int main() {\n"
|
|
" return 0\n"
|
|
"}", nullptr, true, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #4943 take care of C++11 initializer lists
|
|
check("std::vector<Foo> Bar() {\n"
|
|
" return\n"
|
|
" {\n"
|
|
" { \"1\" },\n"
|
|
" { \"2\" },\n"
|
|
" { \"3\" }\n"
|
|
" };\n"
|
|
"}", nullptr, true, false, false, false);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void checkComparisonFunctionIsAlwaysTrueOrFalse() {
|
|
// positive test
|
|
check("bool f(int x){\n"
|
|
" return isless(x,x);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of two identical variables with isless(x,x) evaluates always to false.\n", errout.str());
|
|
|
|
check("bool f(int x){\n"
|
|
" return isgreater(x,x);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of two identical variables with isgreater(x,x) evaluates always to false.\n", errout.str());
|
|
|
|
check("bool f(int x){\n"
|
|
" return islessgreater(x,x);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of two identical variables with islessgreater(x,x) evaluates always to false.\n", errout.str());
|
|
|
|
check("bool f(int x){\n"
|
|
" return islessequal(x,x);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of two identical variables with islessequal(x,x) evaluates always to true.\n", errout.str());
|
|
|
|
check("bool f(int x){\n"
|
|
" return isgreaterequal(x,x);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Comparison of two identical variables with isgreaterequal(x,x) evaluates always to true.\n", errout.str());
|
|
|
|
// no warning should be reported for
|
|
check("bool f(int x, int y){\n"
|
|
" return isgreaterequal(x,y) && islessequal(x,y) && islessgreater(x,y) && isgreater(x,y) && isless(x,y);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void integerOverflow() { // 5895
|
|
// no signed integer overflow should happen
|
|
check("void f(unsigned long long ull) {\n"
|
|
" if (ull == 0x89504e470d0a1a0a || ull == 0x8a4d4e470d0a1a0a) ;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testReturnIgnoredReturnValue() {
|
|
check("void foo() {\n"
|
|
" strcmp(a, b);\n"
|
|
"}", "test.cpp", false, false, false, true, &settings_std);
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Return value of function strcmp() is not used.\n", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" return strcmp(a, b);\n"
|
|
"}", "test.cpp", false, false, false, true, &settings_std);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" if(strcmp(a, b));\n"
|
|
"}", "test.cpp", false, false, false, true, &settings_std);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo() {\n"
|
|
" bool b = strcmp(a, b);\n"
|
|
"}", "test.cpp", false, false, false, true, &settings_std);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// #6194
|
|
check("void foo() {\n"
|
|
" std::ofstream log(logfile.c_str(), std::ios::out);\n"
|
|
"}", "test.cpp", false, false, false, true, &settings_std);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
};
|
|
|
|
REGISTER_TEST(TestOther)
|