1924 lines
60 KiB
C++
1924 lines
60 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2011 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 "tokenize.h"
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#include "checkother.h"
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#include "testsuite.h"
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#include <sstream>
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extern std::ostringstream errout;
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class TestOther : public TestFixture
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{
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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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void run()
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{
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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(sprintf1); // Dangerous usage of sprintf
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TEST_CASE(sprintf2);
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TEST_CASE(sprintf3);
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TEST_CASE(sprintf4); // struct member
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TEST_CASE(strPlusChar1); // "/usr" + '/'
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TEST_CASE(strPlusChar2); // "/usr" + ch
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TEST_CASE(strPlusChar3); // ok: path + "/sub" + '/'
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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(oldStylePointerCast);
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TEST_CASE(dangerousStrolUsage);
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TEST_CASE(passedByValue);
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TEST_CASE(mathfunctionCall1);
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TEST_CASE(fflushOnInputStreamTest);
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TEST_CASE(sizeofsizeof);
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TEST_CASE(sizeofCalculation);
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TEST_CASE(switchRedundantAssignmentTest);
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TEST_CASE(selfAssignment);
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TEST_CASE(testScanf1);
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TEST_CASE(testScanf2);
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TEST_CASE(trac1132);
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TEST_CASE(testMisusedScopeObjectDoesNotPickFunction);
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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(trac2071);
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TEST_CASE(trac2084);
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TEST_CASE(assignmentInAssert);
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TEST_CASE(incorrectLogicOperator);
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TEST_CASE(catchExceptionByValue);
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TEST_CASE(memsetZeroBytes);
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TEST_CASE(sizeofForArrayParameter);
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TEST_CASE(clarifyCalculation);
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TEST_CASE(incorrectStringCompare);
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TEST_CASE(incrementBoolean);
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}
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void check(const char code[], const char *filename = NULL)
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{
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// Clear the error buffer..
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errout.str("");
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Settings settings;
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settings._checkCodingStyle = true;
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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.sizeofsizeof();
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checkOther.sizeofCalculation();
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checkOther.checkRedundantAssignmentInSwitch();
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checkOther.checkAssignmentInAssert();
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checkOther.checkSizeofForArrayParameter();
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// Simplify token list..
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tokenizer.simplifyTokenList();
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checkOther.checkZeroDivision();
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checkOther.checkMathFunctions();
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checkOther.checkFflushOnInputStream();
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checkOther.checkSelfAssignment();
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checkOther.invalidScanf();
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checkOther.checkMisusedScopedObject();
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checkOther.checkIncorrectLogicOperator();
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checkOther.checkCatchExceptionByValue();
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checkOther.checkMemsetZeroBytes();
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checkOther.clarifyCalculation();
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checkOther.checkIncorrectStringCompare();
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checkOther.checkIncrementBoolean();
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}
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void zeroDiv1()
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{
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check("void foo()\n"
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"{\n"
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" int a = 0;\n"
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" double b = 1.;\n"
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" cout<<b/a;\n"
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"}");
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ASSERT_EQUALS("[test.cpp:5]: (error) Division by zero\n", errout.str());
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}
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void zeroDiv2()
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{
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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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" int n = 100;\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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"}\n");
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ASSERT_EQUALS("", errout.str());
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check("void foo()\n"
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"{\n"
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" int a = 0 ? (2/0) : 0;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void zeroDiv3()
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{
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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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"}\n");
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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 zeroDiv4()
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{
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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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"}\n");
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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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"}\n");
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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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"}\n");
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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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"}\n");
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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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"}\n");
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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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"}\n");
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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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"}\n");
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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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"}\n");
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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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"}\n");
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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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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void sprintfUsage(const char code[])
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{
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// Clear the error buffer..
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errout.str("");
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Settings settings;
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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, "test.cpp");
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tokenizer.setVarId();
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//tokenizer.tokens()->printOut( "tokens" );
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// Check for redundant code..
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CheckOther checkOther(&tokenizer, &settings, this);
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checkOther.invalidFunctionUsage();
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}
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void sprintf1()
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{
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sprintfUsage("void foo()\n"
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"{\n"
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" char buf[100];\n"
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" sprintf(buf,\"%s\",buf);\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:4]: (error) Undefined behavior: variable is used as parameter and destination in s[n]printf().\n", errout.str());
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}
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void sprintf2()
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{
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sprintfUsage("void foo()\n"
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"{\n"
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" char buf[100];\n"
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" sprintf(buf,\"%i\",sizeof(buf));\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void sprintf3()
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{
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sprintfUsage("void foo()\n"
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"{\n"
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" char buf[100];\n"
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" sprintf(buf,\"%i\",sizeof(buf));\n"
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" if (buf[0]);\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void sprintf4()
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{
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sprintfUsage("struct A\n"
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"{\n"
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" char filename[128];\n"
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"};\n"
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"\n"
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"void foo()\n"
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"{\n"
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" const char* filename = \"hello\";\n"
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" struct A a;\n"
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" snprintf(a.filename, 128, \"%s\", filename);\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void strPlusChar(const char code[])
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{
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// Clear the error buffer..
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errout.str("");
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Settings settings;
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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, "test.cpp");
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tokenizer.setVarId();
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// Check for redundant code..
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CheckOther checkOther(&tokenizer, &settings, this);
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checkOther.strPlusChar();
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}
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void strPlusChar1()
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{
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// Strange looking pointer arithmetic..
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strPlusChar("void foo()\n"
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"{\n"
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" const char *p = \"/usr\" + '/';\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (error) Unusual pointer arithmetic\n", errout.str());
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}
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void strPlusChar2()
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{
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// Strange looking pointer arithmetic..
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strPlusChar("void foo()\n"
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"{\n"
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" char ch = 1;\n"
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" const char *p = ch + \"/usr\";\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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// Strange looking pointer arithmetic..
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strPlusChar("void foo()\n"
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"{\n"
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" int i = 1;\n"
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" const char* psz = \"Bla\";\n"
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" const std::string str = i + psz;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void strPlusChar3()
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{
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// Strange looking pointer arithmetic..
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strPlusChar("void foo()\n"
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"{\n"
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" std::string temp = \"/tmp\";\n"
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" std::string path = temp + '/' + \"sub\" + '/';\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void varScope(const char code[])
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{
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// Clear the error buffer..
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errout.str("");
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Settings settings;
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settings.addEnabled("information");
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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, "test.cpp");
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// Check for redundant code..
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CheckOther checkOther(&tokenizer, &settings, this);
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checkOther.checkVariableScope();
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}
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void varScope1()
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{
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varScope("unsigned short foo()\n"
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"{\n"
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" test_client CClient;\n"
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" try\n"
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" {\n"
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" if (CClient.Open())\n"
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" {\n"
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" return 0;\n"
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" }\n"
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" }\n"
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" catch (...)\n"
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" {\n"
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" return 2;\n"
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" }\n"
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"\n"
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" try\n"
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" {\n"
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" CClient.Close();\n"
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" }\n"
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" catch (...)\n"
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" {\n"
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" return 2;\n"
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" }\n"
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"\n"
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" return 1;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void varScope2()
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{
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varScope("int foo()\n"
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"{\n"
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" Error e;\n"
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" e.SetValue(12);\n"
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" throw e;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void varScope3()
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{
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varScope("void foo()\n"
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"{\n"
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" int i;\n"
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" int *p = 0;\n"
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" if (abc)\n"
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" {\n"
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" p = &i;\n"
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" }\n"
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" *p = 1;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void varScope4()
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{
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varScope("void foo()\n"
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"{\n"
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" int i;\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void varScope5()
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{
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varScope("void f(int x)\n"
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"{\n"
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" int i = 0;\n"
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" if (x) {\n"
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" for ( ; i < 10; ++i) ;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (information) The scope of the variable i can be reduced\n", errout.str());
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varScope("void f(int x)\n"
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"{\n"
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" int i = 0;\n"
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" if (x) {b()}\n"
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" else {\n"
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" for ( ; i < 10; ++i) ;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:3]: (information) The scope of the variable i can be reduced\n", errout.str());
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}
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void varScope6()
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{
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varScope("void f(int x)\n"
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"{\n"
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" int i = x;\n"
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" if (a) {\n"
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" x++;\n"
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" }\n"
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" if (b) {\n"
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" c(i);\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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varScope("void f()\n"
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"{\n"
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"int foo = 0;\n"
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"std::vector<int> vec(10);\n"
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"BOOST_FOREACH(int& i, vec)\n"
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"{\n"
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" foo += 1;\n"
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" if(foo == 10)\n"
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" {\n"
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" return 0;\n"
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" }\n"
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"}\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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varScope("void f(int &x)\n"
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"{\n"
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" int n = 1;\n"
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" do\n"
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" {\n"
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" ++n;\n"
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" ++x;\n"
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" } while (x);\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void varScope7()
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{
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varScope("void f(int x)\n"
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"{\n"
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" int y = 0;\n"
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" b(y);\n"
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" if (x) {\n"
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" y++;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("", errout.str());
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}
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void varScope8()
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{
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varScope("void test() {\n"
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" float edgeResistance=1;\n"
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" std::vector<int> edges;\n"
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" BOOST_FOREACH(int edge, edges) {\n"
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" edgeResistance = (edge+1) / 2.0;\n"
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" }\n"
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"}\n");
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ASSERT_EQUALS("[test.cpp:2]: (information) The scope of the variable edgeResistance can be reduced\n", errout.str());
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}
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void varScope9()
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{
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// classes may have extra side effects
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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"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope10()
|
|
{
|
|
// classes may have extra side effects
|
|
varScope("int f()\n"
|
|
"{\n"
|
|
" int x = 0;\n"
|
|
" FOR {\n"
|
|
" foo(x++);\n"
|
|
" }\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void varScope11()
|
|
{
|
|
varScope("int f() {\n"
|
|
" int x = 0;\n"
|
|
" AB ab = { x, 0 };\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
varScope("int f() {\n"
|
|
" int x = 0;\n"
|
|
" if (a == 0) { ++x; }\n"
|
|
" AB ab = { x, 0 };\n"
|
|
"}\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"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void checkOldStylePointerCast(const char code[])
|
|
{
|
|
// Clear the error buffer..
|
|
errout.str("");
|
|
|
|
Settings settings;
|
|
settings._checkCodingStyle = true;
|
|
|
|
// Tokenize..
|
|
Tokenizer tokenizerCpp(&settings, this);
|
|
std::istringstream istr(code);
|
|
tokenizerCpp.tokenize(istr, "test.cpp");
|
|
tokenizerCpp.setVarId();
|
|
|
|
Tokenizer tokenizerC(&settings, this);
|
|
std::istringstream istr2(code);
|
|
tokenizerC.tokenize(istr2, "test.c");
|
|
tokenizerC.setVarId();
|
|
|
|
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"
|
|
"}\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"
|
|
"}\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"
|
|
"}\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"
|
|
"}\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"
|
|
"}\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"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
checkOldStylePointerCast("class B;\n"
|
|
"class A\n"
|
|
"{\n"
|
|
" virtual void abc(const B *) const = 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void dangerousStrolUsage()
|
|
{
|
|
{
|
|
sprintfUsage("int f(const char *num)\n"
|
|
"{\n"
|
|
" return strtol(num, NULL, 1);\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Invalid radix in call to strtol or strtoul. Must be 0 or 2-36\n", errout.str());
|
|
}
|
|
|
|
{
|
|
sprintfUsage("int f(const char *num)\n"
|
|
"{\n"
|
|
" return strtol(num, NULL, 10);\n"
|
|
"}\n");
|
|
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
}
|
|
|
|
void testPassedByValue(const char code[])
|
|
{
|
|
// Clear the error buffer..
|
|
errout.str("");
|
|
|
|
Settings settings;
|
|
settings._checkCodingStyle = true;
|
|
|
|
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("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<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());
|
|
}
|
|
|
|
void mathfunctionCall1()
|
|
{
|
|
// log|log10
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(-2) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value -2 to log() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(-1.) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value -1. to log() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(-1.0) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value -1.0 to log() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(-0.1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value -0.1 to log() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(0) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value 0 to log() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(0.) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value 0. to log() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(0.0) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value 0.0 to log() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(1.0E+3) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(1.0E-3) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(1E-3) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::string *log(0);\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << log(2.0) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
// acos
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << acos(1) << std::endl;\n"
|
|
" std::cout << acos(-1) << std::endl;\n"
|
|
" std::cout << acos(0.1) << std::endl;\n"
|
|
" std::cout << acos(0.0001) << std::endl;\n"
|
|
" std::cout << acos(0.01) << std::endl;\n"
|
|
" std::cout << acos(1.0E-1) << std::endl;\n"
|
|
" std::cout << acos(-1.0E-1) << std::endl;\n"
|
|
" std::cout << acos(+1.0E-1) << std::endl;\n"
|
|
" std::cout << acos(0.1E-1) << std::endl;\n"
|
|
" std::cout << acos(+0.1E-1) << std::endl;\n"
|
|
" std::cout << acos(-0.1E-1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << acos(1.1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value 1.1 to acos() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << acos(-1.1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value -1.1 to acos() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << acos(-110) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value -110 to acos() leads to undefined result\n", errout.str());
|
|
|
|
|
|
// 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"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << atan2(0,0) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value 0 and 0 to atan2() leads to undefined result\n", errout.str());
|
|
|
|
|
|
// fmod
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << fmod(1.0,0) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value 1.0 and 0 to fmod() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << fmod(1.0,1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
// pow
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << pow(0,-10) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value 0 and -10 to pow() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << pow(0,10) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// sqrt
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << sqrt(-1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) Passing value -1 to sqrt() leads to undefined result\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" std::cout << sqrt(1) << std::endl;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
}
|
|
|
|
void fflushOnInputStreamTest()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" fflush(stdin);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (error) fflush() called on input stream \"stdin\" may result in undefined behaviour\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" fflush(stdout);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void sizeofsizeof()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int i = sizeof sizeof char;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Calling sizeof for 'sizeof'.\n", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int i = sizeof (sizeof long);\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Calling sizeof for 'sizeof'.\n", errout.str());
|
|
|
|
check("void foo(long *p)\n"
|
|
"{\n"
|
|
" int i = sizeof (sizeof (p));\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Calling sizeof for 'sizeof'.\n", errout.str());
|
|
}
|
|
|
|
void sizeofCalculation()
|
|
{
|
|
check("sizeof(a+b)");
|
|
ASSERT_EQUALS("[test.cpp:1]: (warning) Found calculation inside sizeof()\n", errout.str());
|
|
|
|
check("sizeof(-a)");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("sizeof(void * const)");
|
|
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"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:7]: (warning) Redundant assignment of \"y\" in switch\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"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:8]: (warning) Redundant assignment of \"y\" in switch\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"
|
|
"}\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 (y)\n"
|
|
" printf(\"%d\", y);\n"
|
|
" }\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
"}\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"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int y = 1;\n"
|
|
" switch (x)\n"
|
|
" {\n"
|
|
" case 2:\n"
|
|
" {\n"
|
|
" int y = 2;\n"
|
|
" }\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\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"
|
|
" break;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\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"
|
|
" continue;\n"
|
|
" case 3:\n"
|
|
" y = 3;\n"
|
|
" }\n"
|
|
" }\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"
|
|
"}\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"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void selfAssignment()
|
|
{
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int x = 1;\n"
|
|
" x = x;\n"
|
|
" return 0;\n"
|
|
"}\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"
|
|
"}\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"
|
|
"}\n");
|
|
TODO_ASSERT_EQUALS("[test.cpp:3]: (warning) Redundant assignment of \"var\" to itself\n", "", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int x = 1;\n"
|
|
" x = x + 1;\n"
|
|
" return 0;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" int *x = getx();\n"
|
|
" *x = x;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// non-primitive type -> there might be some side effects
|
|
check("void foo()\n"
|
|
"{\n"
|
|
" Fred fred; fred = fred;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testScanf1()
|
|
{
|
|
check("#include <stdio.h>\n"
|
|
"int main(int argc, char **argv)\n"
|
|
"{\n"
|
|
" int a, b;\n"
|
|
" FILE *file = fopen(\"test\", \"r\");\n"
|
|
" b = fscanf(file, \"aa %ds\", &a);\n"
|
|
" c = scanf(\"aa %ds\", &a);\n"
|
|
" b = fscanf(file, \"aa%%ds\", &a);\n"
|
|
" fclose(file);\n"
|
|
" return b;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:6]: (warning) scanf without field width limits can crash with huge input data\n"
|
|
"[test.cpp:7]: (warning) scanf without field width limits can crash with huge input data\n", errout.str());
|
|
}
|
|
|
|
void testScanf2()
|
|
{
|
|
check("#include <stdio.h>\n"
|
|
"int main(int argc, char **argv)\n"
|
|
"{\n"
|
|
" int a, b;\n"
|
|
" FILE *file = fopen(\"test\", \"r\");\n"
|
|
" b = fscanf(file, \"aa%%%ds\", &a);\n"
|
|
" c = scanf(\"aa %%%ds\", &a);\n"
|
|
" b = fscanf(file, \"aa%%ds\", &a);\n"
|
|
" fclose(file);\n"
|
|
" return b;\n"
|
|
"}\n");
|
|
ASSERT_EQUALS("[test.cpp:6]: (warning) scanf without field width limits can crash with huge input data\n"
|
|
"[test.cpp:7]: (warning) scanf without field width limits can crash with huge input data\n", errout.str());
|
|
}
|
|
|
|
void trac1132()
|
|
{
|
|
std::istringstream code("#include <iostream>\n"
|
|
"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"
|
|
);
|
|
|
|
errout.str("");
|
|
|
|
Settings settings;
|
|
|
|
Tokenizer tokenizer(&settings, this);
|
|
tokenizer.tokenize(code, "trac1132.cpp");
|
|
tokenizer.simplifyTokenList();
|
|
|
|
CheckOther checkOther(&tokenizer, &settings, this);
|
|
checkOther.checkMisusedScopedObject();
|
|
|
|
ASSERT_EQUALS("[trac1132.cpp:16]: (error) instance of \"Lock\" object destroyed immediately\n", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectDoesNotPickFunction()
|
|
{
|
|
check("int main ( )\n"
|
|
"{\n"
|
|
" CouldBeFunction ( 123 ) ;\n"
|
|
" return 0 ;\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 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 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 SomthingElse\n"
|
|
"{\n"
|
|
"public:\n"
|
|
"~Something ( ) ;\n"
|
|
"Something ( ) ;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void testMisusedScopeObjectDoesNotPickFunctor()
|
|
{
|
|
check("\n"
|
|
"#include <algorithm>\n"
|
|
"\n"
|
|
"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"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:7]: (error) instance of \"Foo\" object 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"
|
|
"}\n";
|
|
|
|
check(code, "test.cpp");
|
|
ASSERT_EQUALS("[test.cpp:7]: (error) instance of \"cb_watch_bool\" object destroyed immediately\n", errout.str());
|
|
|
|
check(code, "test.c");
|
|
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"
|
|
"}\n";
|
|
|
|
check(code, "test.cpp");
|
|
TODO_ASSERT_EQUALS("", "[test.cpp:13]: (error) instance of \"Init\" object destroyed immediately\n", errout.str());
|
|
}
|
|
|
|
void trac2084()
|
|
{
|
|
check("#include <signal.h>\n"
|
|
"\n"
|
|
"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 assignmentInAssert()
|
|
{
|
|
check("void f() {\n"
|
|
" int a = 0;\n"
|
|
" assert(a = 2);\n"
|
|
" return a;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Assert statement modifies 'a'.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int a = 0;\n"
|
|
" assert(a == 2);\n"
|
|
" return a;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int a = 0;\n"
|
|
" int b = 0;\n"
|
|
" assert(a == 2 && b = 1);\n"
|
|
" return a;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:4]: (warning) Assert statement modifies 'b'.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int a = 0;\n"
|
|
" assert(a += 2);\n"
|
|
" return a;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Assert statement modifies 'a'.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int a = 0;\n"
|
|
" assert(a *= 2);\n"
|
|
" return a;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Assert statement modifies 'a'.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int a = 0;\n"
|
|
" assert(a -= 2);\n"
|
|
" return a;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Assert statement modifies 'a'.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int a = 0;\n"
|
|
" assert(a --);\n"
|
|
" return a;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:3]: (warning) Assert statement modifies 'a'.\n", errout.str());
|
|
}
|
|
|
|
void incorrectLogicOperator()
|
|
{
|
|
check("void f(int x) {\n"
|
|
" if ((x != 1) || (x != 3))\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Mutual exclusion over || always evaluates to true. Did you intend to use && instead?\n", errout.str());
|
|
|
|
check("void f(int x) {\n"
|
|
" if (x != 1 || x != 3)\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Mutual exclusion over || always evaluates to true. Did you intend to use && instead?\n", errout.str());
|
|
|
|
check("void f(int x) {\n"
|
|
" if (1 != x || 3 != x)\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) Mutual exclusion over || always evaluates to true. Did you intend to use && instead?\n", errout.str());
|
|
|
|
check("void f(int x, int y) {\n"
|
|
" if (x != 1 || y != 1)\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(int x, int y) {\n"
|
|
" if ((y == 1) && (x != 1) || (x != 3))\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(int x, int y) {\n"
|
|
" if ((x != 1) || (x != 3) && (y == 1))\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(int x) {\n"
|
|
" if ((x != 1) && (x != 3))\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(int x) {\n"
|
|
" if ((x == 1) || (x == 3))\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(int x, int y) {\n"
|
|
" if ((x != 1) || (y != 3))\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(int x, int y) {\n"
|
|
" if ((x != hotdog) || (y != hotdog))\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(int x, int y) {\n"
|
|
" if ((x != 5) || (y != 5))\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
check("void f(int x) {\n"
|
|
" const int ERR1 = 5;\n"
|
|
" const int ERR2 = 6;\n"
|
|
" if ((x != ERR1) || (x != ERR2))\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:4]: (warning) Mutual exclusion over || always evaluates to true. Did you intend to use && instead?\n", errout.str());
|
|
|
|
check("void f(int x, int y) {\n"
|
|
" const int ERR1 = 5;\n"
|
|
" if ((x != ERR1) || (y != ERR1))\n"
|
|
" a++;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f(unsigned int a, unsigned int b, unsigned int c) {\n"
|
|
" if((a != b) || (c != b) || (c != a))\n"
|
|
" {\n"
|
|
" return true;\n"
|
|
" }\n"
|
|
" return false;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void catchExceptionByValue()
|
|
{
|
|
check("void f() {\n"
|
|
" try\n"
|
|
" {\n"
|
|
" foo();\n"
|
|
" }\n"
|
|
" catch( ::std::exception err)\n"
|
|
" {\n"
|
|
" throw err;\n"
|
|
" }\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:6]: (style) Exception should be caught by reference.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" try\n"
|
|
" {\n"
|
|
" foo();\n"
|
|
" }\n"
|
|
" catch(const exception err)\n"
|
|
" {\n"
|
|
" throw err;\n"
|
|
" }\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:6]: (style) Exception should be caught by reference.\n", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" try\n"
|
|
" {\n"
|
|
" foo();\n"
|
|
" }\n"
|
|
" catch( ::std::exception& err)\n"
|
|
" {\n"
|
|
" throw err;\n"
|
|
" }\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" try\n"
|
|
" {\n"
|
|
" foo();\n"
|
|
" }\n"
|
|
" catch(exception* err)\n"
|
|
" {\n"
|
|
" throw err;\n"
|
|
" }\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" try\n"
|
|
" {\n"
|
|
" foo();\n"
|
|
" }\n"
|
|
" catch(const exception& err)\n"
|
|
" {\n"
|
|
" throw err;\n"
|
|
" }\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" try\n"
|
|
" {\n"
|
|
" foo();\n"
|
|
" }\n"
|
|
" catch(int err)\n"
|
|
" {\n"
|
|
" throw err;\n"
|
|
" }\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" try\n"
|
|
" {\n"
|
|
" foo();\n"
|
|
" }\n"
|
|
" catch(exception* const err)\n"
|
|
" {\n"
|
|
" throw err;\n"
|
|
" }\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
void memsetZeroBytes()
|
|
{
|
|
check("void f() {\n"
|
|
" memset(p, 10, 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), 0)\n"
|
|
"}\n"
|
|
);
|
|
TODO_ASSERT_EQUALS("[test.cpp:2]: (warning) memset() called to fill 0"
|
|
" bytes of \"p\". Second and third arguments might be inverted.\n",
|
|
|
|
"", errout.str());
|
|
}
|
|
|
|
void sizeofForArrayParameter()
|
|
{
|
|
check("void f() {\n"
|
|
" int a[10];\n"
|
|
" std::cout << sizeof(a) / sizeof(int) << std::endl;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" unsigned int a = 2;\n"
|
|
" unsigned int b = 2;\n"
|
|
" int c[(a+b)];\n"
|
|
" std::cout << sizeof(c) / sizeof(int) << std::endl;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" unsigned int a = { 2 };\n"
|
|
" unsigned int b[] = { 0 };\n"
|
|
" int c[a[b[0]]];\n"
|
|
" std::cout << sizeof(c) / sizeof(int) << std::endl;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
check("void f() {\n"
|
|
" unsigned int a[] = { 1 };\n"
|
|
" unsigned int b = 2;\n"
|
|
" int c[(a[0]+b)];\n"
|
|
" std::cout << sizeof(c) / sizeof(int) << std::endl;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int a[] = { 1, 2, 3 };\n"
|
|
" std::cout << sizeof(a) / sizeof(int) << std::endl;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" int a[3] = { 1, 2, 3 };\n"
|
|
" std::cout << sizeof(a) / sizeof(int) << std::endl;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f( int a[]) {\n"
|
|
" std::cout << sizeof(a) / sizeof(int) << std::endl;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:2]: (error) Using sizeof for array given as "
|
|
"function argument returns the size of pointer.\n", errout.str());
|
|
|
|
check("void f( int a[]) {\n"
|
|
" std::cout << sizeof a / sizeof(int) << std::endl;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:2]: (error) Using sizeof for array given as "
|
|
"function argument returns the size of pointer.\n", errout.str());
|
|
|
|
check("void f( int a[3] ) {\n"
|
|
" std::cout << sizeof(a) / sizeof(int) << std::endl;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:2]: (error) Using sizeof for array given as "
|
|
"function argument returns the size of pointer.\n", errout.str());
|
|
|
|
check("void f(int *p) {\n"
|
|
" p[0] = 0;\n"
|
|
" sizeof(p);\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("void f() {\n"
|
|
" char p[] = \"test\";\n"
|
|
" sizeof(p);\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// ticket 2495
|
|
check("void f() {\n"
|
|
" static float col[][3]={\n"
|
|
" {1,0,0},\n"
|
|
" {0,0,1},\n"
|
|
" {0,1,0},\n"
|
|
" {1,0,1},\n"
|
|
" {1,0,1},\n"
|
|
" {1,0,1},\n"
|
|
" };\n"
|
|
" const int COL_MAX=sizeof(col)/sizeof(col[0]);\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// ticket 155
|
|
check("void f() {\n"
|
|
" char buff1[1024*64],buff2[sizeof(buff1)*2];\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
// ticket 2510
|
|
check("void f( int a[], int b) {\n"
|
|
" std::cout << sizeof(a) / sizeof(int) << std::endl;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:2]: (error) Using sizeof for array given as "
|
|
"function argument returns the size of pointer.\n", errout.str());
|
|
|
|
// ticket 2510
|
|
check("void f( int a[3] , int b[2] ) {\n"
|
|
" std::cout << sizeof(a) / sizeof(int) << std::endl;\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("[test.cpp:2]: (error) Using sizeof for array given as "
|
|
"function argument returns the size of pointer.\n", errout.str());
|
|
|
|
// ticket 2510
|
|
check("void f() {\n"
|
|
" char buff1[1024*64],buff2[sizeof(buff1)*(2+1)];\n"
|
|
"}\n"
|
|
);
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
|
|
|
|
}
|
|
|
|
void clarifyCalculation()
|
|
{
|
|
check("int f(char c) {\n"
|
|
" return 10 * (c == 0) ? 1 : 2;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (information) Please clarify precedence: 'a*b?..'\n", errout.str());
|
|
|
|
check("void f(char c) {\n"
|
|
" printf(\"%i\", 10 * (c == 0) ? 1 : 2);\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (information) Please clarify precedence: 'a*b?..'\n", errout.str());
|
|
}
|
|
|
|
void incorrectStringCompare()
|
|
{
|
|
check("int f() {\n"
|
|
" return test.substr( 0 , 4 ) == \"Hello\" ? : 0 : 1 ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) String literal \"Hello\" doesn't match length argument for substr(4).\n", errout.str());
|
|
|
|
check("int f() {\n"
|
|
" return test.substr( 0 , 5 ) == \"Hello\" ? : 0 : 1 ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int f() {\n"
|
|
" return \"Hello\" == test.substr( 0 , 4 ) ? : 0 : 1 ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) String literal \"Hello\" doesn't match length argument for substr(4).\n", errout.str());
|
|
|
|
check("int f() {\n"
|
|
" return \"Hello\" == test.substr( 0 , 5 ) ? : 0 : 1 ;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
|
|
check("int f() {\n"
|
|
" return strncmp(\"test\" , \"test\" , 2) ; \n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (warning) String literal \"test\" doesn't match length argument for strncmp(2).\n", errout.str());
|
|
|
|
check("int f() {\n"
|
|
" return strncmp(\"test\" , \"test\" , 4) ; \n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
|
|
|
|
void incrementBoolean()
|
|
{
|
|
check("bool bValue = true;\n"
|
|
"bValue++;\n");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) The use of a variable of type bool with the ++ postfix operator is always true and deprecated by the C++ Standard.\n", errout.str());
|
|
|
|
check("void f(bool test){\n"
|
|
" test++;\n"
|
|
"}");
|
|
ASSERT_EQUALS("[test.cpp:2]: (style) The use of a variable of type bool with the ++ postfix operator is always true and deprecated by the C++ Standard.\n", errout.str());
|
|
|
|
check("void f(int test){\n"
|
|
" test++;\n"
|
|
"}");
|
|
ASSERT_EQUALS("", errout.str());
|
|
}
|
|
};
|
|
|
|
REGISTER_TEST(TestOther)
|
|
|