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cppcheck/test/testmemleak.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2016 Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "tokenize.h"
#include "tokenlist.h"
#include "checkmemoryleak.h"
#include "testsuite.h"
#include "symboldatabase.h"
#include "preprocessor.h"
class TestMemleak : private TestFixture {
public:
TestMemleak() : TestFixture("TestMemleak") {
}
private:
Settings settings;
void run() {
TEST_CASE(testFunctionReturnType);
TEST_CASE(open);
}
CheckMemoryLeak::AllocType functionReturnType(const char code[]) {
// Clear the error buffer..
errout.str("");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
CheckMemoryLeak c(&tokenizer, this, &settings);
return c.functionReturnType(&tokenizer.getSymbolDatabase()->scopeList.front().functionList.front());
}
void testFunctionReturnType() {
{
const char code[] = "const char *foo()\n"
"{ return 0; }";
ASSERT_EQUALS(CheckMemoryLeak::No, functionReturnType(code));
}
{
const char code[] = "Fred *newFred()\n"
"{ return new Fred; }";
ASSERT_EQUALS(CheckMemoryLeak::New, functionReturnType(code));
}
{
const char code[] = "char *foo()\n"
"{ return new char[100]; }";
ASSERT_EQUALS(CheckMemoryLeak::NewArray, functionReturnType(code));
}
{
const char code[] = "char *foo()\n"
"{\n"
" char *p = new char[100];\n"
" return p;\n"
"}";
ASSERT_EQUALS(CheckMemoryLeak::NewArray, functionReturnType(code));
}
}
void open() {
const char code[] = "class A {\n"
" static int open() {\n"
" return 1;\n"
" }\n"
"\n"
" A() {\n"
" int ret = open();\n"
" }\n"
"};\n";
// Clear the error buffer..
errout.str("");
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// there is no allocation
const Token *tok = Token::findsimplematch(tokenizer.tokens(), "ret =");
CheckMemoryLeak check(&tokenizer, 0, &settings);
ASSERT_EQUALS(CheckMemoryLeak::No, check.getAllocationType(tok->tokAt(2), 1));
}
};
REGISTER_TEST(TestMemleak)
class TestMemleakInFunction : public TestFixture {
public:
TestMemleakInFunction() : TestFixture("TestMemleakInFunction") {
}
private:
Settings settings0;
Settings settings1;
Settings settings2;
void check(const char code[], bool c = false, bool posix = false, bool experimental = false, Settings *settings = nullptr) {
// Clear the error buffer..
errout.str("");
if (!settings)
settings = &settings1;
settings->experimental = experimental;
settings->standards.posix = posix;
// Tokenize..
Tokenizer tokenizer(settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, c?"test.c":"test.cpp");
tokenizer.simplifyTokenList2();
// Check for memory leaks..
CheckMemoryLeakInFunction checkMemoryLeak(&tokenizer, settings, this);
checkMemoryLeak.checkReallocUsage();
checkMemoryLeak.check();
}
void run() {
LOAD_LIB_2(settings1.library, "std.cfg");
LOAD_LIB_2(settings1.library, "posix.cfg");
LOAD_LIB_2(settings2.library, "std.cfg");
// Check that getcode works correctly..
TEST_CASE(testgetcode);
// check that call_func works correctly..
TEST_CASE(call_func);
// Check that simplifycode works correctly..
TEST_CASE(simplifycode);
// Check that errors are found..
TEST_CASE(findleak);
TEST_CASE(simple5);
TEST_CASE(simple7);
TEST_CASE(simple9); // Bug 2435468 - member function "free"
TEST_CASE(simple11);
TEST_CASE(nonstd_free);
TEST_CASE(new_nothrow);
TEST_CASE(staticvar);
TEST_CASE(externvar);
TEST_CASE(referencevar); // 3954 - false positive for reference pointer
TEST_CASE(alloc_alloc_1);
TEST_CASE(ifelse6);
TEST_CASE(ifelse7);
TEST_CASE(ifelse8);
TEST_CASE(ifelse10);
TEST_CASE(if4);
TEST_CASE(if7); // Bug 2401436
TEST_CASE(if8); // Bug 2458532
TEST_CASE(if9); // if (realloc)
TEST_CASE(if10); // else if (realloc)
TEST_CASE(if11);
TEST_CASE(if12); // Ticket #7745
TEST_CASE(forwhile5);
TEST_CASE(forwhile6);
TEST_CASE(forwhile8); // Bug 2429936
TEST_CASE(forwhile9);
TEST_CASE(forwhile10);
TEST_CASE(forwhile11);
TEST_CASE(forwhile12);
TEST_CASE(switch2);
TEST_CASE(switch3);
TEST_CASE(ret5); // Bug 2458436 - return use
TEST_CASE(ret6);
TEST_CASE(ret7);
TEST_CASE(ret8);
TEST_CASE(mismatch1);
TEST_CASE(mismatch2);
TEST_CASE(mismatch3);
TEST_CASE(mismatch4);
TEST_CASE(mismatch5);
TEST_CASE(mismatch6);
TEST_CASE(mismatchSize);
TEST_CASE(func3);
TEST_CASE(func4);
TEST_CASE(func5);
TEST_CASE(func6);
TEST_CASE(func7);
TEST_CASE(func9); // Embedding the function call in a if-condition
TEST_CASE(func10); // Bug 2458510 - Function pointer
TEST_CASE(func11); // Bug 2458510 - Function pointer
TEST_CASE(func12);
TEST_CASE(func13);
TEST_CASE(func14);
TEST_CASE(func15);
TEST_CASE(func16);
TEST_CASE(func17);
TEST_CASE(func18);
TEST_CASE(func19); // Ticket #2056 - if (!f(p)) return 0;
TEST_CASE(func20); // Ticket #2182 - exit is not handled
TEST_CASE(func21); // Ticket #2569
TEST_CASE(func22); // Ticket #2668
TEST_CASE(func23); // Ticket #2667
TEST_CASE(func24); // Ticket #2705
TEST_CASE(func25); // Ticket #2904
TEST_CASE(func26);
TEST_CASE(func27); // Ticket #2773
TEST_CASE(func28); // Ticket #3236
TEST_CASE(allocfunc1);
TEST_CASE(allocfunc2);
TEST_CASE(allocfunc3);
TEST_CASE(allocfunc4);
TEST_CASE(allocfunc5);
TEST_CASE(allocfunc6);
TEST_CASE(allocfunc7);
TEST_CASE(allocfunc8);
TEST_CASE(allocfunc9);
TEST_CASE(allocfunc10);
TEST_CASE(allocfunc11);
TEST_CASE(allocfunc12); // #3660: allocating and returning non-local pointer => not allocfunc
TEST_CASE(allocfunc13); // Ticket #4494 and #4540 - class function
TEST_CASE(allocfunc14); // Use pointer before returning it
TEST_CASE(inlineFunction); // #3989 - inline function
TEST_CASE(throw1);
TEST_CASE(throw2);
TEST_CASE(linux_list_1);
TEST_CASE(linux_list_2);
TEST_CASE(sizeof1);
TEST_CASE(realloc1);
TEST_CASE(realloc2);
TEST_CASE(realloc3);
TEST_CASE(realloc4);
TEST_CASE(realloc5);
TEST_CASE(realloc6);
TEST_CASE(realloc7);
TEST_CASE(realloc8);
TEST_CASE(realloc9);
TEST_CASE(realloc10);
TEST_CASE(realloc11);
TEST_CASE(realloc12);
TEST_CASE(realloc13);
TEST_CASE(realloc14);
TEST_CASE(realloc15);
TEST_CASE(realloc16);
TEST_CASE(assign1);
TEST_CASE(varid);
TEST_CASE(cast1);
// Using deallocated memory:
// * It is ok to take the address to deallocated memory
// * It is not ok to dereference a pointer to deallocated memory
TEST_CASE(dealloc_use);
TEST_CASE(dealloc_use_2);
TEST_CASE(dealloc_use_3);
// free a free'd pointer
TEST_CASE(freefree1);
TEST_CASE(freefree2);
TEST_CASE(freefree3); // #4236 - FP. bar(&p)
TEST_CASE(strcpy_result_assignment);
TEST_CASE(strcat_result_assignment);
TEST_CASE(all1); // Extra checking when --all is given
TEST_CASE(malloc_constant_1); // Check that the malloc constant matches the type
// Calls to unknown functions.. they may throw exception, quit the program, etc
TEST_CASE(unknownFunction1);
TEST_CASE(unknownFunction2);
TEST_CASE(unknownFunction4);
TEST_CASE(unknownFunction5);
// detect leak in class member function..
TEST_CASE(class1);
TEST_CASE(class2);
TEST_CASE(autoptr1);
TEST_CASE(if_with_and);
TEST_CASE(assign_pclose);
TEST_CASE(conditional_dealloc_return); // #7820
// Using the function "exit"
TEST_CASE(exit2);
TEST_CASE(exit4);
TEST_CASE(exit5);
TEST_CASE(exit6);
TEST_CASE(exit7);
TEST_CASE(noreturn);
TEST_CASE(strndup_function);
TEST_CASE(tmpfile_function);
TEST_CASE(fcloseall_function);
TEST_CASE(file_functions);
TEST_CASE(getc_function);
TEST_CASE(open_function);
TEST_CASE(creat_function);
TEST_CASE(close_function);
TEST_CASE(fd_functions);
TEST_CASE(pointer_to_pointer);
TEST_CASE(dealloc_and_alloc_in_func);
// Unknown syntax
TEST_CASE(unknownSyntax1);
TEST_CASE(knownFunctions);
TEST_CASE(same_function_name);
// #1440 - Check function parameters also..
TEST_CASE(functionParameter);
// setjmp/longjmp..
TEST_CASE(jmp);
TEST_CASE(trac1949);
TEST_CASE(trac2540);
// #2662: segfault because of endless recursion (call_func -> getAllocationType -> functionReturnType -> call_func ..)
TEST_CASE(trac2662);
// #1879 non regression test case
TEST_CASE(trac1879);
TEST_CASE(ptrptr);
TEST_CASE(c_code);
TEST_CASE(gnucfg);
TEST_CASE(trac3991);
TEST_CASE(crash);
TEST_CASE(trac7680);
TEST_CASE(trac7440);
}
std::string getcode(const char code[], const char varname[], bool classfunc=false) {
// Clear the error buffer..
errout.str("");
settings2.standards.posix = true;
// Tokenize..
Tokenizer tokenizer(&settings2, this);
std::istringstream istr(code);
if (!tokenizer.tokenize(istr, "test.cpp"))
return "";
tokenizer.simplifyTokenList2();
const Token * start = tokenizer.tokens();
const SymbolDatabase * db = tokenizer.getSymbolDatabase();
if (db && db->functionScopes.size())
start = db->functionScopes[0]->classStart->next();
const unsigned int varId(Token::findmatch(start, varname)->varId());
// getcode..
CheckMemoryLeakInFunction checkMemoryLeak(&tokenizer, &settings2, nullptr);
std::list<const Token *> callstack;
callstack.push_back(0);
CheckMemoryLeak::AllocType allocType, deallocType;
allocType = deallocType = CheckMemoryLeak::No;
Token *tokens = checkMemoryLeak.getcode(start, callstack, varId, allocType, deallocType, classfunc, 1);
// stringify..
std::ostringstream ret;
for (const Token *tok = tokens; tok; tok = tok->next())
ret << tok->str();
TokenList::deleteTokens(tokens);
return ret.str();
}
void testgetcode() {
// alloc;
ASSERT_EQUALS(";;alloc;", getcode("int *a = malloc(100);", "a"));
TODO_ASSERT_EQUALS(";;alloc;", ";;alloccallfunc;", getcode("int *a = ::malloc(100);", "a"));
ASSERT_EQUALS(";;alloc;", getcode("int *a = new int;", "a"));
ASSERT_EQUALS(";;alloc;", getcode("int *a = new int[10];", "a"));
ASSERT_EQUALS(";;alloc;", getcode("int **a = new int*[10];", "a"));
ASSERT_EQUALS(";;alloc;", getcode("int * const a = new int[10];", "a"));
ASSERT_EQUALS(";;alloc;", getcode("const int * const a = new int[10];", "a"));
ASSERT_EQUALS(";;assign;", getcode("A * a = new (X) A;", "a"));
ASSERT_EQUALS(";;alloc;", getcode("int i = open(a,b);", "i"));
ASSERT_EQUALS(";;assign;", getcode("int i = open();", "i"));
ASSERT_EQUALS(";;alloc;use;", getcode("int *p; dostuff(p = new int);", "p"));
ASSERT_EQUALS(";;alloc;use;", getcode("int *p; dostuff(p = new int());", "p"));
ASSERT_EQUALS(";;alloc;use;", getcode("int *p; fred.dostuff(p = new int);", "p"));
ASSERT_EQUALS(";;alloc;use;", getcode("int *p; fred.dostuff(p = new int());", "p"));
// alloc; return use;
ASSERT_EQUALS(";;alloc;returnuse;", getcode("int *a = new int[10]; return a;", "a"));
ASSERT_EQUALS(";;alloc;returnuse;", getcode("char *a = new char[100]; return (char *)a;", "a"));
// alloc; return;
ASSERT_EQUALS(";;alloc;return;", getcode("char *s = new char[100]; return 0;", "s"));
ASSERT_EQUALS(";;alloc;return;", getcode("char *s = new char[100]; return s[0];", "s"));
ASSERT_EQUALS(";;alloc;return;", getcode("char *s = new char[100]; return strcmp(s,x);", "s"));
// lock/unlock..
ASSERT_EQUALS(";;alloc;", getcode("int a; __cppcheck_lock();", ""));
ASSERT_EQUALS(";;callfunc;", getcode("int a; __cppcheck_lock();", "a"));
ASSERT_EQUALS(";;dealloc;", getcode("int a; __cppcheck_unlock();", ""));
ASSERT_EQUALS(";;callfunc;", getcode("int a; __cppcheck_unlock();", "a"));
// dealloc;
ASSERT_EQUALS(";;dealloc;", getcode("char *s; free(s);", "s"));
ASSERT_EQUALS(";;dealloc;", getcode("char *s; free((void *)s);", "s"));
ASSERT_EQUALS(";;dealloc;", getcode("char *s; free((void *)(s));", "s"));
ASSERT_EQUALS(";;dealloc;", getcode("char *s; free(reinterpret_cast<void *>(s));", "s"));
ASSERT_EQUALS(";;dealloc;", getcode("char *s; ::free(s);", "s")); // #2802
ASSERT_EQUALS(";;dealloc;", getcode("char *s; delete s;", "s"));
ASSERT_EQUALS(";;dealloc;", getcode("char *s; delete (s);", "s"));
TODO_ASSERT_EQUALS(";;dealloc;",
";;;", getcode("char *s; delete (void *)(s);", "s"));
ASSERT_EQUALS(";;dealloc;", getcode("char *s; delete [] s;", "s"));
ASSERT_EQUALS(";;dealloc;", getcode("char *s; delete [] (s);", "s"));
ASSERT_EQUALS(";;dealloc;", getcode("void *p; foo(fclose(p));", "p"));
ASSERT_EQUALS(";;dealloc;", getcode("void *p; foo(close(p));", "p"));
ASSERT_EQUALS(";;;;", getcode("FILE *f1; FILE *f2; fclose(f1);", "f2"));
ASSERT_EQUALS(";;returnuse;", getcode("FILE *f; return fclose(f) == EOF ? 1 : 2;", "f"));
ASSERT_EQUALS(";;dealloc;", getcode("char *s; s ? free(s) : 0;", "s"));
// if..
ASSERT_EQUALS(";;if{}", getcode("char *s; if (a) { }", "s"));
ASSERT_EQUALS(";;dealloc;ifv{}", getcode("FILE *f; if (fclose(f)) { }", "f"));
ASSERT_EQUALS(";;if(!var){}else{}", getcode("char *s; if (!s) { } else { }", "s"));
TODO_ASSERT_EQUALS(";;ifv{}",";;if{}", getcode("char *s; if (a && s) { }", "s"));
ASSERT_EQUALS(";;ifv{}", getcode("char *s; if (s && a) { }", "s"));
ASSERT_EQUALS(";;;ifv{}", getcode("char *s; int a; if (a && s) { }", "s"));
ASSERT_EQUALS(";;;ifv{}", getcode("char *s; int a; if (s && a) { }", "s"));
ASSERT_EQUALS(";;ifv{}", getcode("char *s; if (a || s) { }", "s"));
ASSERT_EQUALS(";;ifv{}", getcode("char *s; if (s || a) { }", "s"));
ASSERT_EQUALS(";;if(!var){}", getcode("char *s; if (a && !s) { }", "s"));
ASSERT_EQUALS(";;ifv{}", getcode("char *s; if (foo(!s)) { }", "s"));
ASSERT_EQUALS(";;;if{dealloc;};if{dealloc;return;}assign;returnuse;", getcode("char *buf, *tmp; tmp = realloc(buf, 40); if (!(tmp)) { free(buf); return; } buf = tmp; return buf;", "buf"));
ASSERT_EQUALS(";;if{}", getcode("FILE *f; if (fgets(buf,100,f)){}", "f"));
ASSERT_EQUALS(";;alloc;if(var){dealloc;}", getcode("int fd = open(a,b); if (0 < fd) { close(fd); }", "fd"));
ASSERT_EQUALS(";;use;if{}", getcode("char *s; if (x(s)) { }", "s"));
ASSERT_EQUALS(";;use;if{}", getcode("char *s; if (x(&s)) { }", "s"));
ASSERT_EQUALS(";;use;if{}", getcode("char *s; if (!s || x(&s)) { }", "s"));
ASSERT_EQUALS(";;ifv{}", getcode("int ffd; if (ffd<0 && (ffd=a)<0){}", "ffd"));
// if (ticket #2442)
ASSERT_EQUALS(";;;;if(!var){;}ifv{}", getcode("char *s; int x = 0; if (!s) { x = 2; } if (x) { }", "s"));
ASSERT_EQUALS(";;;;if(!var){;}if{}", getcode("char *s; int x = 0; if (!s) { x = 2; } if (y) { }", "s"));
// switch..
ASSERT_EQUALS(";;switch{case;;break;};", getcode("char *s; switch(a){case 1: break;};", "s"));
// loop..
ASSERT_EQUALS(";;loop{}", getcode("char *s; while (a) { }", "s"));
ASSERT_EQUALS(";;loopcallfunc{}", getcode("char *s; while (a()) { }", "s"));
ASSERT_EQUALS(";;loop{}", getcode("char *s; for (a;b;c) { }", "s"));
ASSERT_EQUALS(";;loop{alloc;}", getcode("char *s; for (a;b;c) { s=malloc(10); }", "s"));
ASSERT_EQUALS(";;do{}loop;", getcode("char *s; do { } while (a);", "s"));
ASSERT_EQUALS(";;while1{}", getcode("char *s; while(true) { }", "s"));
ASSERT_EQUALS(";;while1{}", getcode("char *s; for(;;) { }", "s"));
ASSERT_EQUALS(";;while(var){}", getcode("char *s; while (s) { }", "s"));
ASSERT_EQUALS(";;while(!var){}", getcode("char *s; while (!s) { }", "s"));
ASSERT_EQUALS(";;alloc;while(var){}", getcode("int fd = open(a,b); while (fd >= 0) { }", "fd"));
ASSERT_EQUALS(";;alloc;while(!var){}", getcode("int fd = open(a,b); while (fd < 0) { }", "fd"));
// asprintf..
ASSERT_EQUALS(";;alloc;", getcode("char *s; asprintf(&s, \"xyz\");", "s"));
ASSERT_EQUALS(";;alloc;", getcode("char *s; asprintf(&s, \"s: %s\", s);", "s"));
ASSERT_EQUALS(";;;", getcode("char *s; asprintf(&p, \"s: %s\", s);", "s"));
// Since we don't check how the return value is used we must bail out
ASSERT_EQUALS("", getcode("char *s; int ret = asprintf(&s, \"xyz\");", "s"));
TODO_ASSERT_EQUALS(";;alloc;",
"", getcode("char *s; int ret; ret=asprintf(&s, \"xyz\"); if (ret==-1) return;", "s"));
// use..
ASSERT_EQUALS(";;use;", getcode("char *s; a(s);", "s"));
ASSERT_EQUALS(";;use;", getcode("char *s; (*a)(s);", "s"));
ASSERT_EQUALS(";;use;", getcode("char *s; abc.a(s);", "s"));
ASSERT_EQUALS(";;use;", getcode("char *s; s2 = s;", "s"));
ASSERT_EQUALS(";;use;", getcode("char *s; s2 = s + 10;", "s"));
ASSERT_EQUALS(";;use;", getcode("char *s; s2 = x + s;", "s"));
ASSERT_EQUALS(";;use;if{;}", getcode("char *s; if (foo(s)) ;", "s"));
ASSERT_EQUALS(";;use;", getcode("char *s; map1[s] = 0;", "s"));
ASSERT_EQUALS(";;;use;", getcode("char *p; const char *q; q = p;", "p"));
ASSERT_EQUALS(";;use;;", getcode("char *s; x = {1,s};", "s"));
ASSERT_EQUALS(";{};;alloc;;use;", getcode("struct Foo { }; Foo *p; p = malloc(10); const Foo *q; q = p;", "p"));
ASSERT_EQUALS(";;useuse_;", getcode("struct AB *ab; f(ab->a);", "ab"));
ASSERT_EQUALS(";;use;", getcode("struct AB *ab; ab = pop(ab);", "ab"));
// non-use..
ASSERT_EQUALS(";;use_;", getcode("char *s; c = x + s[0];","s"));
ASSERT_EQUALS(";;use_;", getcode("char *s; c = s[0] + x;","s"));
ASSERT_EQUALS(";;use_;", getcode("type *c; y = x + c->y;","c"));
ASSERT_EQUALS(";;use_;", getcode("type *c; y = c->y + x;","c"));
ASSERT_EQUALS(";;use_;", getcode("char *s; s = s + 1;", "s"));
ASSERT_EQUALS(";;dealloc;;", getcode("struct foo *s; free(s); printf(a,sizeof(*s));", "s"));
ASSERT_EQUALS(";;do{dealloc;;}while(var);", getcode("struct foo *s; do{free(s); printf(a,sizeof(*s));}while(s);", "s"));
// use reference
ASSERT_EQUALS(";;callfunc&use;", getcode("struct AB *ab; f(&ab);", "ab"));
// return..
ASSERT_EQUALS(";;return;", getcode("char *s; return;", "s"));
ASSERT_EQUALS(";;returnuse;", getcode("char *s; return s;", "s"));
ASSERT_EQUALS(";;return;", getcode("char *s; return 5 + s[0];", "s"));
// assign..
ASSERT_EQUALS(";;assign;", getcode("char *s; s = 0;", "s"));
ASSERT_EQUALS(";;;", getcode("char *s; s = strcpy(s, p);", "s"));
// callfunc..
ASSERT_EQUALS(";;assign;", getcode("char *s; s = a();", "s"));
ASSERT_EQUALS(";;callfunc;", getcode("char *s; a();", "s"));
ASSERT_EQUALS(";;callfunc;", getcode("char *s; abc.a();", "s"));
ASSERT_EQUALS(";;;", getcode("char *s; x = a();", "s")); // the function call is irrelevant
// exit..
ASSERT_EQUALS(";;exit;", getcode("char *s; exit(0);", "s"));
ASSERT_EQUALS(";;callfunc;", getcode("char *s; _exit(0);", "s")); // not in std.cfg
ASSERT_EQUALS(";;exit;", getcode("char *s; abort();", "s"));
ASSERT_EQUALS(";;callfunc;", getcode("char *s; err(0);", "s")); // not in std.cfg
ASSERT_EQUALS(";;if{exit;}", getcode("char *s; if (a) { exit(0); }", "s"));
// list_for_each
ASSERT_EQUALS(";;exit;{}}", getcode("void f() { char *s; list_for_each(x,y,s) { } }", "s"));
// open/close
ASSERT_EQUALS(";;alloc;if(var){dealloc;}", getcode("int f; f=open(a,b); if(f>=0)close(f);", "f"));
ASSERT_EQUALS(";;alloc;if(var){dealloc;}", getcode("int f; f=open(a,b); if(f>-1)close(f);", "f"));
ASSERT_EQUALS(";;alloc;ifv{;}", getcode("int f; f=open(a,b); if(f!=-1 || x);", "f"));
ASSERT_EQUALS(";;;dealloc;loop{}", getcode(";int f; while (close(f) == -1) { }", "f"));
ASSERT_EQUALS(";;;dealloc;assign;;", getcode(";int res; res = close(res);", "res"));
ASSERT_EQUALS(";;dealloc;", getcode("int f; e |= fclose(f);", "f"));
ASSERT_EQUALS(";;dealloc;", getcode("int f; e += fclose(f);", "f"));
ASSERT_EQUALS(";;dealloc;", getcode("int f; foo(fclose(f));", "f"));
// fcloseall..
ASSERT_EQUALS(";;alloc;;", getcode("char *s; s = malloc(10); fcloseall();", "s"));
ASSERT_EQUALS(";;alloc;dealloc;", getcode("FILE *f; f = fopen(a,b); fcloseall();", "f"));
// call memcpy in class function..
ASSERT_EQUALS(";;alloc;;", getcode("char *s; s = new char[10]; memcpy(s,a);", "s", true));
// #2112 - Segmentation fault in the getcode function
ASSERT_THROW(getcode("page *one = foo();\n"
"ASSERT(one, return 0)\n"
"const int two = rand();\n"
"return 0;\n"
"}", "one"), InternalError);
// ticket #2336: calling member function with same name as a white_list function
ASSERT_EQUALS(";;use;", getcode("char *s; foo.write(s);", "s"));
// #2473 - inner struct
ASSERT_EQUALS(";;alloc;{;;};dealloc;",
getcode("char *s = new char[10];\n"
"struct ab { int a, b; };\n"
"delete [] s;\n", "s"));
// #4405 - catch
ASSERT_EQUALS(";;catch{}", getcode("char *s; catch(err) { }", "s"));
}
bool test_white_list(const std::string& str, bool cpp = true) const {
return CheckMemoryLeakInFunction::test_white_list(str, &settings1, cpp);
}
void call_func() const {
// whitelist..
ASSERT_EQUALS(true, test_white_list("qsort"));
ASSERT_EQUALS(true, test_white_list("scanf"));
ASSERT_EQUALS(true, test_white_list("sscanf"));
// #1293
ASSERT_EQUALS(true, test_white_list("time"));
ASSERT_EQUALS(true, test_white_list("asctime"));
ASSERT_EQUALS(true, test_white_list("asctime_r"));
ASSERT_EQUALS(true, test_white_list("ctime"));
ASSERT_EQUALS(true, test_white_list("ctime_r"));
ASSERT_EQUALS(true, test_white_list("gmtime"));
ASSERT_EQUALS(true, test_white_list("gmtime_r"));
ASSERT_EQUALS(true, test_white_list("localtime"));
ASSERT_EQUALS(true, test_white_list("localtime_r"));
ASSERT_EQUALS(true, test_white_list("memcmp"));
ASSERT_EQUALS(true, test_white_list("gets"));
ASSERT_EQUALS(true, test_white_list("vprintf"));
ASSERT_EQUALS(true, test_white_list("vfprintf"));
ASSERT_EQUALS(true, test_white_list("vsprintf"));
ASSERT_EQUALS(true, test_white_list("snprintf"));
ASSERT_EQUALS(true, test_white_list("vsnprintf"));
ASSERT_EQUALS(true, test_white_list("delete", true));
ASSERT_EQUALS(false, test_white_list("delete", false));
static const char * const call_func_white_list[] = {
"access", "asprintf", "atof", "atoi", "atol", "chdir", "chmod", "clearerr", "chown"
, "fchmod", "fcntl", "fdatasync", "feof", "ferror", "fflush", "fgetc", "fgetpos", "fgets"
, "flock", "for", "fprintf", "fputc", "fputs", "fread", "free", "freopen", "fscanf", "fseek"
, "fseeko", "fsetpos", "fstat", "fsync", "ftell", "ftello", "ftruncate"
, "fwrite", "getc", "if", "ioctl", "lockf", "lseek", "open", "memchr", "memcpy"
, "memmove", "memset", "mkstemp", "perror", "posix_fadvise", "posix_fallocate", "pread"
, "printf", "puts", "pwrite", "read", "readahead", "readdir", "readdir_r", "readv"
, "realloc", "return", "rewind", "rewinddir", "scandir", "seekdir"
, "setbuf", "setbuffer", "setlinebuf", "setvbuf", "snprintf", "sprintf", "stpcpy", "strcasecmp"
, "strcat", "strchr", "strcmp", "strcpy", "stricmp", "strlen", "strncat", "strncmp"
, "strncpy", "strrchr", "strspn" ,"strstr", "strtod", "strtol", "strtoul", "switch"
, "sync_file_range", "telldir", "typeid", "while", "write", "writev", "lstat", "stat"
, "_open", "_wopen", "vscanf", "vsscanf", "vfscanf", "vasprintf", "utime", "utimes", "unlink"
, "tempnam", "system", "symlink", "strpbrk", "strncasecmp", "strdup", "strcspn", "strcoll"
, "setlocale", "sethostname", "rmdir", "rindex", "rename", "remove", "adjtime", "creat", "execle"
, "execl", "execlp", "execve", "execv", "fmemopen", "fnmatch", "fopencookie", "fopen"
, "getgrnam", "gethostbyaddr", "getnetbyname", "getopt", "getopt_long", "getprotobyname", "getpwnam"
, "getservbyname", "getservbyport", "glob", "index", "inet_addr", "inet_aton", "inet_network"
, "initgroups", "link", "mblen", "mbstowcs", "mbtowc", "mkdir", "mkfifo", "mknod", "obstack_printf"
, "obstack_vprintf", "opendir", "parse_printf_format", "pathconf", "popen", "psignal"
, "readlink", "regcomp", "strxfrm", "wordexp", "sizeof", "strtok"
};
for (unsigned int i = 0; i < (sizeof(call_func_white_list) / sizeof(char *)); ++i) {
bool ret = test_white_list(call_func_white_list[i]);
ASSERT_EQUALS("", ret ? "" : call_func_white_list[i]);
}
}
std::string simplifycode(const char code[]) {
// Clear the error buffer..
errout.str("");
// Tokenize..
std::istringstream istr(code);
Tokenizer tokenizer(&settings0, this);
tokenizer.list.createTokens(istr, "test.cpp");
// replace "if ( ! var )" => "if(!var)"
for (Token *tok = tokenizer.list.front(); tok; tok = tok->next()) {
if (Token::Match(tok, "if|while ( var )")) {
Token::eraseTokens(tok, tok->tokAt(4));
tok->str(tok->str() + "(var)");
}
else if (Token::Match(tok, "if|while ( ! var )")) {
Token::eraseTokens(tok, tok->tokAt(5));
tok->str(tok->str() + "(!var)");
}
}
CheckMemoryLeakInFunction checkMemoryLeak(&tokenizer, &settings0, this);
checkMemoryLeak.simplifycode(tokenizer.list.front());
return tokenizer.tokens()->stringifyList(0, false);
}
// Test that the CheckMemoryLeaksInFunction::simplifycode works
void simplifycode() {
ASSERT_EQUALS(";", simplifycode("; ; ; ;"));
ASSERT_EQUALS(";", simplifycode("; if ;"));
ASSERT_EQUALS("alloc ;", simplifycode("alloc ; if ; if(var) ; ifv ; if(!var) ;"));
ASSERT_EQUALS("alloc ;", simplifycode("alloc ; if ; else ;"));
// use..
ASSERT_EQUALS("; use ; }", simplifycode("; use use ; }"));
ASSERT_EQUALS("; use ; }", simplifycode("; use use_ ; }"));
ASSERT_EQUALS("; use ; }", simplifycode("; use_ use ; }"));
ASSERT_EQUALS("; use ; }", simplifycode("; &use use ; }"));
ASSERT_EQUALS("; use ; }", simplifycode("; use &use ; }"));
ASSERT_EQUALS("; alloc ; dealloc ; }", simplifycode("; alloc ; use ; use ; if use ; dealloc ; }"));
// if, else..
ASSERT_EQUALS("; alloc ; if break ; dealloc ;", simplifycode("; alloc ; if { break; } dealloc ;"));
ASSERT_EQUALS("; alloc ; if continue ; dealloc ;", simplifycode("; alloc ; if { continue; } dealloc ;"));
ASSERT_EQUALS("; alloc ;", simplifycode("; alloc; if { return use; }"));
ASSERT_EQUALS("; alloc ; dealloc ;", simplifycode("; alloc; if(!var) { return; } dealloc;"));
ASSERT_EQUALS("; alloc ;", simplifycode("; if { alloc; } else { return; }"));
ASSERT_EQUALS("; alloc ; dealloc ;", simplifycode("; alloc ; if(!var) { alloc ; } dealloc ;"));
ASSERT_EQUALS("; use ;", simplifycode("; if(var) use ;"));
ASSERT_EQUALS("; break ;", simplifycode("; if break ; else break ;"));
ASSERT_EQUALS("; alloc ; if return ;", simplifycode("; alloc ; loop { if return ; if continue ; }"));
ASSERT_EQUALS("; alloc ; if return ;", simplifycode("; alloc ; loop { if continue ; else return ; }"));
ASSERT_EQUALS("; alloc ; if dealloc ;", simplifycode("; alloc ; if(!var) { return ; } if { dealloc ; }"));
ASSERT_EQUALS("; if alloc ; else assign ; return use ;", simplifycode("; callfunc ; if callfunc { alloc ; } else { assign ; } return use ;"));
ASSERT_EQUALS("; dealloc ; return ;", simplifycode("; while1 { if callfunc { dealloc ; return ; } else { continue ; } }"));
// remove outer if (#2733)
ASSERT_EQUALS("alloc ; return ; }", simplifycode("alloc ; if { if return use ; } return ; }"));
ASSERT_EQUALS("alloc ; return ; }", simplifycode("alloc ; if { if(var) return use ; } return ; }"));
ASSERT_EQUALS("alloc ; return ; }", simplifycode("alloc ; if(var) { if return use ; } return ; }"));
// "if ; .."
ASSERT_EQUALS("; if xxx ;", simplifycode("; if ; else xxx ;"));
ASSERT_EQUALS("; if(var) xxx ;", simplifycode("; if(!var) ; else xxx ;"));
ASSERT_EQUALS("; if(!var) xxx ;", simplifycode("; if(var) ; else xxx ;"));
ASSERT_EQUALS("; ifv xxx ;", simplifycode("; ifv ; else xxx ;"));
ASSERT_EQUALS("; alloc ;", simplifycode("; alloc; if { dealloc; return; }"));
ASSERT_EQUALS("; alloc ;", simplifycode("; alloc; if { return use; }"));
ASSERT_EQUALS("; alloc ; return ;", simplifycode(";alloc;if{return;}return;"));
ASSERT_EQUALS("; alloc ; if assign ; dealloc ;", simplifycode(";alloc;if{assign;}dealloc;"));
// if(var)
ASSERT_EQUALS("; alloc ; return use ;", simplifycode("; alloc ; return use ;"));
ASSERT_EQUALS("; alloc ; return use ;", simplifycode("; alloc ; ifv return ; return use ;"));
// switch..
ASSERT_EQUALS("; alloc ; dealloc ;", simplifycode(";alloc;switch{case;break;};dealloc;"));
ASSERT_EQUALS(";", simplifycode("; switch { case ; return ; default ; break ; }"));
ASSERT_EQUALS(";", simplifycode("; switch { case ; if { return ; } break ; default ; break ; }"));
ASSERT_EQUALS("; use ;", simplifycode("; switch { case ; return ; default ; use ; break ; }"));
ASSERT_EQUALS("; use ;", simplifycode("; while1 { loop { ; } switch { case ; dealloc ; return ; default ; break ; } }"));
ASSERT_EQUALS("; { dealloc ; return ; } }", simplifycode("switch { case ; case ; dealloc ; return ; default ; dealloc ; return ; } }"));
// loops..
ASSERT_EQUALS(";", simplifycode("; loop { ; }"));
ASSERT_EQUALS(";", simplifycode("; loop { break; }"));
ASSERT_EQUALS(";", simplifycode("; loop { if { break; } }"));
ASSERT_EQUALS("; loop alloc ;", simplifycode("; loop { alloc ; }"));
ASSERT_EQUALS("; alloc ; alloc ;", simplifycode("; alloc ; do { alloc ; } loop ;"));
ASSERT_EQUALS("; exit ;", simplifycode("; alloc ; do { } loop ; exit ;"));
ASSERT_EQUALS("; loop use ;", simplifycode("; loop { loop loop use ; } ;"));
ASSERT_EQUALS("; }", simplifycode("; loop { if break ; break ; } ; }"));
ASSERT_EQUALS("; }", simplifycode("; loop { if continue ; if continue ; } ; }"));
{
// ticket #3267
const char expected[] = "; loop if alloc ; if { dealloc ; return ; } }";
ASSERT_EQUALS(expected, simplifycode("; loop { if alloc ; } if { dealloc ; return ; } }"));
ASSERT_EQUALS(expected, simplifycode("; loop { if { alloc ; if(!var) { return ; } } } if { dealloc ; return ; } }"));
}
ASSERT_EQUALS("; alloc ;", simplifycode("; alloc ; while(!var) alloc ;"));
ASSERT_EQUALS("; alloc ; dealloc ; return ;", simplifycode("; alloc ; while1 { if { dealloc ; return ; } }"));
ASSERT_EQUALS("; alloc ; dealloc ; return ;", simplifycode("; alloc ; while1 { if { dealloc ; return ; } if { continue ; } }"));
ASSERT_EQUALS("; alloc ;", simplifycode("; alloc ; while1 { if { dealloc ; return ; } if { break ; } }"));
ASSERT_EQUALS("; alloc ; use ; }", simplifycode("; alloc ; while1 { if { dealloc ; return ; } continue ; } ; }"));
ASSERT_EQUALS(";", simplifycode("; do { dealloc ; alloc ; } while(var) ;"));
ASSERT_EQUALS("dealloc ; alloc ;", simplifycode("loop { dealloc ; alloc ; }"));
ASSERT_EQUALS("dealloc ; alloc ;", simplifycode("while1 { dealloc ; alloc ; }"));
ASSERT_EQUALS("use ; }", simplifycode("loop { use ; callfunc ; } }"));
ASSERT_EQUALS(";", simplifycode("; loop { if { continue ; } else { if continue ; } }"));
ASSERT_EQUALS(";", simplifycode("; loop { { if continue ; if continue ; } }"));
ASSERT_EQUALS("; use ;", simplifycode("; while1 { if { dealloc ; return ; } if { if { continue ; } } }"));
// scope..
TODO_ASSERT_EQUALS("; assign ; if alloc ; }",
"; assign ; dealloc ; if alloc ; }", simplifycode("; assign ; { dealloc ; if alloc ; } }"));
// callfunc..
ASSERT_EQUALS("; callfunc ; }", simplifycode(";callfunc;}"));
ASSERT_EQUALS(";", simplifycode(";callfunc;;"));
ASSERT_EQUALS("; callfunc ; }", simplifycode(";callfunc callfunc ; }"));
ASSERT_EQUALS("dealloc ; alloc ; return ; }", simplifycode("while1 { dealloc ; alloc ; } callfunc ; return ; }"));
ASSERT_EQUALS("; }", simplifycode("loop callfunc ; }"));
ASSERT_EQUALS("alloc ; dealloc ; }", simplifycode("alloc ; if { dealloc ; callfunc } dealloc ; }")); // #4405
// #2900 - don't report false positive
ASSERT_EQUALS("; alloc ; if { if { dealloc ; callfunc ; } return ; } dealloc ; }",
simplifycode("; alloc ; if { if { dealloc ; callfunc ; } return ; } dealloc ; }"));
// exit..
ASSERT_EQUALS("; exit ;", simplifycode("; alloc; exit;"));
ASSERT_EQUALS("; exit ;", simplifycode("; alloc; if { loop ; } dealloc; exit;"));
ASSERT_EQUALS(";", simplifycode("; if { alloc; exit; }"));
ASSERT_EQUALS("; alloc ;", simplifycode("; alloc ; if { use; exit; }"));
ASSERT_EQUALS("; alloc ;", simplifycode("; alloc ; if(!var) { exit; }"));
TODO_ASSERT_EQUALS(";",
"; if(var) exit ;", simplifycode("; alloc ; if(var) { exit; }"));
TODO_ASSERT_EQUALS(";\n; alloc ;",
"; alloc ; ifv exit ;", simplifycode("; alloc ; ifv { exit; }"));
// try-catch
ASSERT_EQUALS("; }", simplifycode("; try ; catch exit ; }"));
// dealloc; dealloc;
ASSERT_EQUALS("; alloc ; if dealloc ; dealloc ;", simplifycode("; alloc ; if { dealloc ; } dealloc ;"));
// use ; dealloc ;
ASSERT_EQUALS("; alloc ; use ; if return ; dealloc ;", simplifycode("; alloc ; use ; if { return ; } dealloc ;"));
// #2635 - false negative
ASSERT_EQUALS("; alloc ; return use ; }",
simplifycode("; alloc ; if(!var) { loop { ifv { } } alloc ; } return use; }"));
}
// is there a leak in given code? if so, return the linenr
unsigned int dofindleak(const char code[]) {
// Clear the error buffer..
errout.str("");
settings0.debug = settings0.debugwarnings = true;
// Tokenize..
std::istringstream istr(code);
TokenList list(&settings0);
list.createTokens(istr,"test.cpp");
Token *tokens=list.front();
// replace "if ( ! var )" => "if(!var)"
for (Token *tok = tokens; tok; tok = tok->next()) {
if (tok->str() == "if_var") {
tok->str("if(var)");
}
else if (Token::simpleMatch(tok, "if ( var )")) {
Token::eraseTokens(tok, tok->tokAt(4));
tok->str("if(var)");
}
else if (Token::simpleMatch(tok, "if ( ! var )")) {
Token::eraseTokens(tok, tok->tokAt(5));
tok->str("if(!var)");
}
}
const Token *tok = CheckMemoryLeakInFunction::findleak(tokens);
settings0.debug = settings0.debugwarnings = false;
return (tok ? tok->linenr() : (unsigned int)(-1));
}
void findleak() {
static const unsigned int notfound = (unsigned int)(-1);
ASSERT_EQUALS(1, dofindleak("alloc;"));
ASSERT_EQUALS(1, dofindleak("; use; { alloc; }"));
ASSERT_EQUALS(2, dofindleak("alloc;\n return;"));
ASSERT_EQUALS(notfound, dofindleak("alloc; return use;"));
ASSERT_EQUALS(2, dofindleak("alloc;\n callfunc;"));
ASSERT_EQUALS(notfound, dofindleak("alloc; use;"));
ASSERT_EQUALS(notfound, dofindleak("assign; alloc; dealloc;"));
ASSERT_EQUALS(notfound, dofindleak("assign; if alloc; dealloc;"));
// if alloc..
ASSERT_EQUALS(2, dofindleak("if alloc;\n return;"));
ASSERT_EQUALS(notfound, dofindleak("if alloc;\n return use;"));
ASSERT_EQUALS(notfound, dofindleak("if alloc;\n use;"));
ASSERT_EQUALS(notfound, dofindleak("if alloc;\n if assign;\n if dealloc; }"));
// if..
ASSERT_EQUALS(notfound, dofindleak("alloc; ifv dealloc;"));
ASSERT_EQUALS(2, dofindleak("alloc;\n if return;\n dealloc;"));
ASSERT_EQUALS(2, dofindleak("alloc;\n if continue;\n dealloc;"));
ASSERT_EQUALS(2, dofindleak("alloc;\n if_var return;\n dealloc;"));
ASSERT_EQUALS(3, dofindleak("alloc;\n if\n return;\n dealloc;"));
ASSERT_EQUALS(notfound, dofindleak("alloc; if { dealloc ; return; } dealloc;"));
ASSERT_EQUALS(notfound, dofindleak("alloc; if { dealloc ; return; } dealloc;"));
ASSERT_EQUALS(notfound, dofindleak("alloc; if { dealloc ; alloc; } dealloc;"));
ASSERT_EQUALS(notfound, dofindleak("alloc;\n if(!var)\n { callfunc;\n return;\n }\n use;"));
ASSERT_EQUALS(notfound, dofindleak("alloc; if { return use; } dealloc;"));
ASSERT_EQUALS(notfound, dofindleak("alloc; if { dealloc; return; } dealloc;"));
ASSERT_EQUALS(5, dofindleak("{\n;\n alloc;\n if dealloc;\n}"));
// assign..
ASSERT_EQUALS(2, dofindleak("alloc;\n assign;\n dealloc;"));
ASSERT_EQUALS(notfound, dofindleak("alloc;\n if(!var) assign;\n dealloc;"));
ASSERT_EQUALS(2, dofindleak(";alloc;\n if assign;\n dealloc;"));
// loop..
TODO_ASSERT_EQUALS(1, notfound, dofindleak("; loop { alloc ; if break; dealloc ; }"));
TODO_ASSERT_EQUALS(1, notfound, dofindleak("; loop { alloc ; if continue; dealloc ; }"));
ASSERT_EQUALS(notfound, dofindleak("; loop { alloc ; if break; } dealloc ;"));
ASSERT_EQUALS(1, dofindleak("; loop alloc ;"));
ASSERT_EQUALS(1, dofindleak("; loop alloc ; dealloc ;"));
// callfunc (might be noreturn)
ASSERT_EQUALS(notfound, dofindleak("; alloc ; callfunc ; }"));
}
void simple5() {
check("static char *f()\n"
"{\n"
" struct *str = new strlist;\n"
" return &str->s;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void simple7() {
// A garbage collector may delete f automatically
check("class Fred;\n"
"void foo()\n"
"{\n"
" Fred *f = new Fred;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void simple9() {
check("void foo()\n"
"{\n"
" MyClass *c = new MyClass();\n"
" c->free(c);\n"
" delete c;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void simple11() {
check("void Fred::aaa()\n"
"{ }\n"
"\n"
"void Fred::foo()\n"
"{\n"
" char *s = NULL;\n"
" if (a)\n"
" s = malloc(10);\n"
" else if (b)\n"
" s = malloc(10);\n"
" else\n"
" f();\n"
" g(s);\n"
" if (c)\n"
" h(s);\n"
" free(s);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void nonstd_free() {
check("void f() {\n"
" void* mem = malloc(100, foo);" // Non-standard malloc() implementation
" free(mem, bar);" // Non-standard free() implementation (#5665)
"}");
ASSERT_EQUALS("", errout.str());
}
void new_nothrow() {
check("void f()\n"
"{\n"
" int *p = new(std::nothrow) int;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Memory leak: p\n", errout.str());
check("void f()\n"
"{\n"
" using std::nothrow;\n"
" int *p = new(nothrow) int;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: p\n", errout.str());
check("void f()\n"
"{\n"
" int *p = new(std::nothrow) int[10];\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Memory leak: p\n", errout.str());
check("void f()\n"
"{\n"
" using namespace std;\n"
" int *p = new(nothrow) int[10];\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: p\n", errout.str());
check("void f()\n"
"{\n"
" int *p = new(std::nothrow) int;\n"
" delete [] p;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Mismatching allocation and deallocation: p\n", errout.str());
check("void f()\n"
"{\n"
" int *p = new(std::nothrow) int[10];\n"
" delete p;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Mismatching allocation and deallocation: p\n", errout.str());
check("void f()\n"
"{\n"
" Fred *f = new(nothrow) Fred;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" Fred *f = new(std::nothrow) Fred;\n"
"}");
ASSERT_EQUALS("", errout.str());
// ticket #2971
check("void f()\n"
"{\n"
" Fred *f = new(std::nothrow) Fred[10];\n"
" delete f;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Mismatching allocation and deallocation: f\n", errout.str());
check("void f()\n"
"{\n"
" struct Fred *f = new(std::nothrow) struct Fred[10];\n"
" delete f;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Mismatching allocation and deallocation: f\n", errout.str());
}
void staticvar() {
check("int f()\n"
"{\n"
" static char *s = 0;\n"
" free(s);\n"
" s = malloc(100);\n"
" return 123;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void externvar() {
check("void f()\n"
"{\n"
" extern char *s;\n"
" s = malloc(100);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void referencevar() { // 3954 - false positive for reference pointer
check("void f() {\n"
" char *&x = get();\n"
" x = malloc(100);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void alloc_alloc_1() {
check("void foo()\n"
"{\n"
" char *str;\n"
" str = new char[10];\n"
" str = new char[20];\n"
" delete [] str;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: str\n", errout.str());
}
void ifelse6() {
check("static char *f()\n"
"{\n"
" char *s = new char[100];\n"
" if ( a == b )\n"
" {\n"
" return s;\n"
" }\n"
" return NULL;\n"
"}");
ASSERT_EQUALS("[test.cpp:8]: (error) Memory leak: s\n", errout.str());
}
void ifelse7() {
check("static char *f()\n"
"{\n"
" char *s;\n"
" if ( abc )\n"
" {\n"
" s = new char[10];\n"
" }\n"
" return s;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void ifelse8() {
check("static char *f()\n"
"{\n"
" char *s = new char[10];\n"
" if ( s )\n"
" {\n"
" return s;\n"
" }\n"
" return 0;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void ifelse10() {
check("static char *f()\n"
"{\n"
" char *s = new char[10];\n"
" if ( ghfgf )\n"
" {\n"
" str[0] = s;\n"
" }\n"
" else\n"
" {\n"
" str[0] = s;\n"
" }\n"
"}\n", false, false, true);
ASSERT_EQUALS("", errout.str());
}
void if4() {
check("void f()\n"
"{\n"
" char *s;\n"
" bool b = true;\n"
" if (b && (s = malloc(256)))\n"
" ;\n"
" if (b)\n"
" free(s);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void if7() {
check("void f( bool b )\n"
"{\n"
" int *a=0;\n"
" if( b )\n"
" {\n"
" a = new int[10];\n"
" }\n"
"\n"
" if( b )\n"
" delete [] a;\n"
" else {}\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void if8() {
check("static void f(int i)\n"
"{\n"
" char *c = malloc(50);\n"
" if (i == 1)\n"
" {\n"
" free(c);\n"
" return;\n"
" }\n"
" if (i == 2)\n"
" {\n"
" return;\n"
" }\n"
" free(c);\n"
"}");
ASSERT_EQUALS("[test.cpp:11]: (error) Memory leak: c\n", errout.str());
}
void if9() {
check("static void f()\n"
"{\n"
" char *buf = NULL, *tmp;\n"
" if (!(tmp = realloc(buf, 50)))\n"
" {\n"
" free(buf);\n"
" return NULL;\n"
" }\n"
" buf = tmp;\n"
" return buf;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void if10() {
check("static void f()\n"
"{\n"
" char *buf = malloc(10);\n"
" if (aa)\n"
" ;\n"
" else if (buf = realloc(buf, 100))\n"
" ;\n"
" free(buf);\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (error) Common realloc mistake: \'buf\' nulled but not freed upon failure\n", errout.str());
}
void if11() {
check("void foo()\n"
"{\n"
" int *x = new int[10];\n"
" if (x == 0 || aa)\n"
" {\n"
" return 1;\n"
" }\n"
" delete [] x;\n"
"}", false, false, true);
TODO_ASSERT_EQUALS("[test.cpp:6]: (error) Memory leak: x\n",
"", errout.str());
}
void if12() { // #7745
check("void f() {\n"
" FILE *fp = fopen(\"name\", \"r\");\n"
" if (!fp) {\n"
" fp = fopen(\"name\", \"w\");\n"
" fclose(fp);\n"
" }\n"
"}", /*c=*/true, /*posix=*/false);
ASSERT_EQUALS("[test.c:7]: (error) Resource leak: fp\n", errout.str());
}
void forwhile5() {
check("void f(const char **a)\n"
"{\n"
" char *str = 0;\n"
" for (int i = 0; i < 10 && !str; ++i)\n"
" {\n"
" str = strdup(a[i]);\n"
" }\n"
" return str;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void forwhile6() {
check("void f(const char **a)\n"
"{\n"
" char *str = 0;\n"
" for (int i = 0; i < 10 && !str; ++i)\n"
" {\n"
" str = strdup(a[i]);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:8]: (error) Memory leak: str\n", errout.str());
}
void forwhile8() {
check("char *f()\n"
"{\n"
" char *a = 0;\n"
" int i = 0;\n"
" for( ;; )\n"
" {\n"
" ++i;\n"
" a = realloc( a, i );\n"
" if( !a )\n"
" return 0;\n"
"\n"
" if( i > 10 )\n"
" break;\n"
" }\n"
"\n"
" return a;\n"
"}");
TODO_ASSERT_EQUALS("[test.cpp:10]: (error) Memory leak: a\n",
"[test.cpp:8]: (error) Common realloc mistake: \'a\' nulled but not freed upon failure\n",
errout.str());
}
void forwhile9() {
check("char *f()\n"
"{\n"
" char *a = 0;\n"
" int i = 0;\n"
" for(i = 0 ;i < 50 ; i++)\n"
" {\n"
" if(func1(i))\n"
" continue;\n"
" a = realloc( a, i );\n"
" if(func2(i))\n"
" continue;\n"
" }\n"
"\n"
" return a;\n"
"}\n", false, false, true);
ASSERT_EQUALS("[test.cpp:9]: (error) Common realloc mistake: \'a\' nulled but not freed upon failure\n", errout.str());
}
void forwhile10() {
check("char *f()\n"
"{\n"
" char *a = 0;\n"
" int i = 0;\n"
" for(i = 0; i < 50; i++)\n"
" {\n"
" if(func1(i))\n"
" continue;\n"
" a = realloc( a, i );\n"
" if(func2(i))\n"
" return;\n"
" }\n"
"\n"
" return a;\n"
"}", false, false, true);
ASSERT_EQUALS("[test.cpp:9]: (error) Common realloc mistake: \'a\' nulled but not freed upon failure\n"
"[test.cpp:11]: (error) Memory leak: a\n", errout.str());
}
void forwhile11() {
check("int main()\n"
"{\n"
" FILE *stream=NULL;\n"
" while((stream = fopen(name,\"r\")) == NULL)\n"
" { }\n"
" if(stream!=NULL) fclose(stream);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void forwhile12() {
check("extern int bar();\n"
"void f() {\n"
" FILE *fp = fopen(\"name\", \"r\" );\n"
" while(bar()) {\n"
" fp = fopen(\"name\", \"w\");\n"
" fclose(fp);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Resource leak: fp\n", errout.str());
check("void f() {\n"
" FILE *fp = fopen(\"name\", \"r\" );\n"
" while(1) {\n"
" fp = fopen(\"name\", \"w\");\n"
" fclose(fp);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Resource leak: fp\n", errout.str());
check("void f() {\n"
" FILE *fp = fopen(\"name\", \"r\" );\n"
" for( ; ; ) {\n"
" fp = fopen(\"name\", \"w\");\n"
" fclose(fp);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Resource leak: fp\n", errout.str());
}
void switch2() {
check("void f()\n"
"{\n"
" char *str = new char[10];\n"
" switch (abc)\n"
" {\n"
" case 1:\n"
" delete [] str;\n"
" break;\n"
" default:\n"
" break;\n"
" };\n"
"}");
ASSERT_EQUALS("[test.cpp:12]: (error) Memory leak: str\n", errout.str());
}
void switch3() {
check("void f()\n"
"{\n"
" char *str = new char[10];\n"
" while (abc)\n"
" {\n"
" switch (def)\n"
" {\n"
" default:\n"
" return;\n"
" }\n"
" }\n"
" delete [] str;\n"
"}");
ASSERT_EQUALS("[test.cpp:9]: (error) Memory leak: str\n", errout.str());
}
void ret5() {
check("static char * f()\n"
"{\n"
" char *c = new char[50];\n"
" return (c ? c : NULL);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void ret6() {
check("void foo()\n"
"{\n"
" char *c = new char[50];\n"
" return strcpy(c, \"foo\");\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void ret7() {
check("void foo()\n"
"{\n"
" char *c = new char[50];\n"
" return memcpy(c, \"foo\",4);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void ret8() {
check("char *foo()\n"
"{\n"
" char *c = new char[50];\n"
" return ((char *)(c+1));\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void mismatch1() {
check("void f()\n"
"{\n"
" int *a = new int[10];\n"
" free(a);\n"
"}\n", false, false, true);
ASSERT_EQUALS("[test.cpp:4]: (error) Mismatching allocation and deallocation: a\n", errout.str());
// ticket #2971
check("void f()\n"
"{\n"
" Fred *a = new Fred[10];\n"
" free(a);\n"
"}\n", false, false, true);
ASSERT_EQUALS("[test.cpp:4]: (error) Mismatching allocation and deallocation: a\n", errout.str());
check("void f()\n"
"{\n"
" struct Fred *a = new struct Fred[10];\n"
" free(a);\n"
"}\n", false, false, true);
ASSERT_EQUALS("[test.cpp:4]: (error) Mismatching allocation and deallocation: a\n", errout.str());
check("void f() {\n"
" char* str = new char[42]();\n"
" delete[] str;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void mismatch2() {
check("void f()\n"
"{\n"
" FILE *fp;\n"
"\n"
" fp = fopen();\n"
" fclose(fp);\n"
"\n"
" fp = popen();\n"
" pclose(fp);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void mismatch3() {
check("void f()\n"
"{\n"
" FILE *fp;\n"
"\n"
" if (abc) fp = fopen();\n"
" else fp = popen();\n"
"\n"
" if (abc) fclose(fp);\n"
" else pclose(fp);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void mismatch4() {
check("void f()\n"
"{\n"
" char *p = 0;\n"
" for (i = 0; i < 10; ++i)\n"
" {\n"
" delete p;\n"
" p = new char[100];\n"
" }\n"
" delete [] p;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:7]: (error) Mismatching allocation and deallocation: p\n", errout.str());
}
void mismatch5() {
check("void f() {\n"
" C *c = new C;\n"
" delete c;\n"
" c = new C[2];\n"
" delete [] c;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void mismatch6() { // #4599
check("void test ( int do_gzip , const char * fn ) {\n"
" FILE * f ;\n"
" if ( do_gzip ) {\n"
" f = popen ( fn , \"wb\" ) ;\n"
" } else {\n"
" f = fopen ( fn , \"wb\" ) ;\n"
" }\n"
" if ( do_gzip ) {\n"
" pclose ( f ) ; }\n"
" else {\n"
" fclose ( f ) ; }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void mismatchSize() {
check("void f(char *buf)\n"
"{\n"
" int i;\n"
" buf = malloc(3);\n"
" buf[i] = 0;\n"
" free(buf);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
////////////////////////////////////////////////
// function calls
////////////////////////////////////////////////
void func3() {
check("static void foo(const char *str)\n"
"{ }\n"
"\n"
"static void f()\n"
"{\n"
" char *p = new char[100];\n"
" foo(p);\n"
"}");
ASSERT_EQUALS("[test.cpp:8]: (error) Memory leak: p\n", errout.str());
}
void func4() {
check("static void foo(char *str)\n"
"{\n"
" delete [] str;\n"
"}\n"
"\n"
"static void f()\n"
"{\n"
" char *p = new char[100];\n"
" foo(p);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func5() {
check("static void foo(char *str)\n"
"{\n"
" delete str;\n"
"}\n"
"\n"
"static void f()\n"
"{\n"
" char *p = new char[100];\n"
" foo(p);\n"
"}", false, false, true);
ASSERT_EQUALS("[test.cpp:9] -> [test.cpp:3]: (error) Mismatching allocation and deallocation: str\n",
errout.str());
}
void func6() {
check("static void foo(char *str)\n"
"{\n"
" goto abc;\n"
"}\n"
"\n"
"static void f()\n"
"{\n"
" char *p = new char[100];\n"
" foo(p);\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (error) Memory leak: p\n", errout.str());
}
void func7() {
check("static void foo(char *str)\n"
"{\n"
" if (abc)\n"
" return;"
" delete [] str;\n"
"}\n"
"\n"
"static void f()\n"
"{\n"
" char *p = new char[100];\n"
" foo(p);\n"
"}");
TODO_ASSERT_EQUALS("[test.cpp:11]: (error) Memory leak: p\n",
"", errout.str());
}
void func9() {
check("int b()\n"
"{\n"
" return 0;\n"
"}\n"
"\n"
"void a()\n"
"{\n"
" char *a = new char[10];\n"
" if (b())\n"
" return;\n"
" delete [] a;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func10() {
check("static void f(void (*fnc)(char*))\n"
"{\n"
" char *c = malloc(50);\n"
" (fnc)(c);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func11() {
check("static void f(struct1 *s1)\n"
"{\n"
" char *c = malloc(50);\n"
" (s1->fnc)(c);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func12() {
check("void add_list(struct mmtimer *n)\n"
"{\n"
" rb_link_node(&n->list, parent, link);\n"
"}\n"
"\n"
"int foo()\n"
"{\n"
" struct mmtimer *base;\n"
"\n"
" base = kmalloc(sizeof(struct mmtimer), GFP_KERNEL);\n"
" if (base == NULL)\n"
" return -ENOMEM;\n"
"\n"
" add_list(base);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func13() {
check("static void f()\n"
"{\n"
" char *p = malloc(100);\n"
" foo(&p);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func14() {
// It is not known what the "foo" that only takes one parameter does..
check("static void foo(char *a, char *b)\n"
"{\n"
" free(a);\n"
" free(b);\n"
"}\n"
"static void f()\n"
"{\n"
" char *p = malloc(100);\n"
" foo(p);\n"
" free(p);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func15() {
check("static void a()\n"
"{ return true; }\n"
"\n"
"static void b()\n"
"{\n"
" char *p = malloc(100);\n"
" if (a()) return;\n" // <- memory leak
" free(p);\n"
"}");
ASSERT_EQUALS("[test.cpp:7]: (error) Memory leak: p\n", errout.str());
}
void func16() {
check("static void a( bo_t *p_bo)\n"
"{\n"
" p_bo->buffer = realloc( p_bo->buffer, 100 );\n"
"}\n"
"\n"
"static bo_t * b()\n"
"{\n"
" bo_t *box;\n"
" if( ( box = malloc( sizeof( bo_t ) ) ) )\n"
" {\n"
" a(box);\n"
" a(box);\n"
" }\n"
" return box;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func17() {
// The "bar" function must be reduced to "use"
check("bool bar(char **parent, char *res, bool a)\n"
"{\n"
" if( a )\n"
" {\n"
" *parent = res;\n"
" return false;\n"
" }\n"
" return true;\n"
"}\n"
"\n"
"void foo(char **parent, bool a)\n"
"{\n"
" if (a)\n"
" {\n"
" char *res = malloc(65);\n"
" bar(parent, res, a);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func18() {
// No false positive
// The "free_pointers" will deallocate all pointers
check("static void free_pointers(int arg_count, ...)\n"
"{\n"
" va_list a;\n"
" va_start(a, arg_count);\n"
" for (int i = 0; i < arg_count; i++)\n"
" {\n"
" free(va_arg(a, void *));\n"
" }\n"
" va_end(a);\n"
"}\n"
"\n"
"static char* foo()\n"
"{\n"
" return strdup(\"\");\n"
"}\n"
"\n"
"static void bar()\n"
"{\n"
" int *p = malloc(16);\n"
" free_pointers(1, p);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func19() {
// Ticket #2056
check("bool a(int *p) {\n"
" return p;\n"
"}\n"
"\n"
"void b() {\n"
" int *p = malloc(16);\n"
" if (!a(p)) return;\n"
" free(p);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func20() {
// Ticket #2182 - false positive when there is unused class.
// If the unused class is removed the false positive goes away.
// [test.cpp:12]: (error) Deallocating a deallocated pointer: p
check("class test {\n"
" void f();\n"
"};\n"
"void test::f() { }\n"
"\n"
"void b(int i) {\n"
" char *p = new char[10];\n"
" if (i) {\n"
" delete [] p;\n"
" exit(0);\n"
" }\n"
" delete [] p;\n"
"}");
ASSERT_EQUALS("", errout.str());
// False positive in classmember
// same code as above but the implementation is used in the
// class member function
check("class test {\n"
" void f(int i);\n"
"};\n"
"void test::f(int i) {\n"
" char *p = new char[10];\n"
" if (i) {\n"
" delete [] p;\n"
" exit(0);\n"
" }\n"
" delete [] p;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
//# Ticket 2569
void func21() {
// checking for lstat function:
// ----------------------------
check("void foo ()\n"
"{\n"
" struct stat CFileAttr;\n"
" char *cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if (lstat (cpFile, &CFileAttr) != 0)\n"
" {\n"
" return;\n"
" }\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (error) Memory leak: cpFile\n", errout.str());
check("void foo ()\n"
"{\n"
" struct stat CFileAttr;\n"
" char *cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if (lstat (cpFile, &CFileAttr) != 0)\n"
" {\n"
" delete [] cpFile;\n"
" return;\n"
" }\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:11]: (error) Memory leak: cpFile\n", errout.str());
check("void foo ()\n"
"{\n"
" struct stat CFileAttr;\n"
" char *cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if (lstat (cpFile, &CFileAttr) != 0)\n"
" {\n"
" delete [] cpFile;\n"
" return;\n"
" }\n"
" delete [] cpFile;\n"
" return;\n"
"}");
ASSERT_EQUALS("", errout.str());
/// checking for stat function:
// ----------------------------
check("void foo ()\n"
"{\n"
" struct stat CFileAttr;\n"
" char *cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if ( stat (cpFile, &CFileAttr) != 0)\n"
" {\n"
" return;\n"
" }\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (error) Memory leak: cpFile\n", errout.str());
check("void foo ()\n"
"{\n"
" struct stat CFileAttr;\n"
" char *cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if ( stat (cpFile, &CFileAttr) != 0)\n"
" {\n"
" delete [] cpFile;\n"
" return;\n"
" }\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:11]: (error) Memory leak: cpFile\n", errout.str());
check("void foo ()\n"
"{\n"
" struct stat CFileAttr;\n"
" char *cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if ( stat (cpFile, &CFileAttr) != 0)\n"
" {\n"
" delete [] cpFile;\n"
" return;\n"
" }\n"
" delete [] cpFile;\n"
" return;\n"
"}");
ASSERT_EQUALS("", errout.str());
// checking for access function
// http://www.gnu.org/s/libc/manual/html_node/Testing-File-Access.html
// --------------------------------------------------------------------
check("void foo ()\n"
"{\n"
" struct stat CFileAttr;\n"
" char *cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if ( access (cpFile, R_OK) != 0)\n"
" {\n"
" return;\n"
" }\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (error) Memory leak: cpFile\n", errout.str());
check("void foo ()\n"
"{\n"
" struct stat CFileAttr;\n"
" char *cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if (access (cpFile, R_OK) != 0)\n"
" {\n"
" delete [] cpFile;\n"
" return;\n"
" }\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:11]: (error) Memory leak: cpFile\n", errout.str());
check("void foo ()\n"
"{\n"
" struct stat CFileAttr;\n"
" char *cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if (access (cpFile, R_OK) != 0)\n"
" {\n"
" delete [] cpFile;\n"
" return;\n"
" }\n"
" delete [] cpFile;\n"
" return;\n"
"}");
ASSERT_EQUALS("", errout.str());
// checking for chdir function
// http://home.fhtw-berlin.de/~junghans/cref/MAN/chdir.htm
// --------------------------------------------------------
check("void foo()\n"
"{\n"
" char * cpDir = new char [7];\n"
" strcpy (cpDir, \"/home/\");\n"
" if (chdir (cpDir) != 0)\n"
" {\n"
" return;\n"
" }\n"
" delete [] cpDir;\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:7]: (error) Memory leak: cpDir\n", errout.str());
check("void foo()\n"
"{\n"
" char * cpDir = new char [7];\n"
" strcpy (cpDir, \"/home/\");\n"
" if (chdir (cpDir) != 0)\n"
" {\n"
" delete [] cpDir;\n"
" return;\n"
" }\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (error) Memory leak: cpDir\n", errout.str());
check("void foo()\n"
"{\n"
" char * cpDir = new char [7];\n"
" strcpy (cpDir, \"/home/\");\n"
" if (chdir (cpDir) != 0)\n"
" {\n"
" delete [] cpDir;\n"
" return;\n"
" }\n"
" delete [] cpDir;\n"
" return;\n"
"}");
ASSERT_EQUALS("", errout.str());
// checking for chmod function
// http://publib.boulder.ibm.com/infocenter/zos/v1r10/index.jsp?topic=/com.ibm.zos.r10.bpxbd00/rtchm.htm
// ------------------------------------------------------------------------------------------------------
check("void foo()\n"
"{\n"
" char * cpDir = new char [7];\n"
" strcpy (cpDir, \"/home/\");\n"
" if (chmod(cpDir, S_IRWXU|S_IRWXG) != 0)\n"
" {\n"
" return;\n"
" }\n"
" delete [] cpDir;\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:7]: (error) Memory leak: cpDir\n", errout.str());
check("void foo()\n"
"{\n"
" char * cpDir = new char [7];\n"
" strcpy (cpDir, \"/home/\");\n"
" if (chmod(cpDir, S_IRWXU|S_IRWXG) != 0)\n"
" {\n"
" delete [] cpDir;\n"
" return;\n"
" }\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (error) Memory leak: cpDir\n", errout.str());
check("void foo()\n"
"{\n"
" char * cpDir = new char [7];\n"
" strcpy (cpDir, \"/home/\");\n"
" if (chmod(cpDir, S_IRWXU|S_IRWXG) != 0)\n"
" {\n"
" delete [] cpDir;\n"
" return;\n"
" }\n"
" delete [] cpDir;\n"
" return;\n"
"}");
ASSERT_EQUALS("", errout.str());
// checking for chown function
// http://publib.boulder.ibm.com/infocenter/zos/v1r10/index.jsp?topic=/com.ibm.zos.r10.bpxbd00/rtchm.htm
// ------------------------------------------------------------------------------------------------------
check("void foo()\n"
"{\n"
" char * cpDir = new char [7];\n"
" strcpy (cpDir, \"/home/\");\n"
" if (chown(cpDir, 25, 0) != 0)\n"
" {\n"
" return;\n"
" }\n"
" delete [] cpDir;\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:7]: (error) Memory leak: cpDir\n", errout.str());
check("void foo()\n"
"{\n"
" char * cpDir = new char [7];\n"
" strcpy (cpDir, \"/home/\");\n"
" if (chown(cpDir, 25, 0) != 0)\n"
" {\n"
" delete [] cpDir;\n"
" return;\n"
" }\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (error) Memory leak: cpDir\n", errout.str());
check("void foo()\n"
"{\n"
" char * cpDir = new char [7];\n"
" strcpy (cpDir, \"/home/\");\n"
" if (chown(cpDir, 25, 0) != 0)\n"
" {\n"
" delete [] cpDir;\n"
" return;\n"
" }\n"
" delete [] cpDir;\n"
" return;\n"
"}");
ASSERT_EQUALS("", errout.str());
// checking perror
//http://www.cplusplus.com/reference/clibrary/cstdio/perror/
// ---------------------------------------------------------
check("void foo()\n"
"{\n"
" char *cBuf = new char[11];\n"
" sprintf(cBuf,\"%s\",\"testtest..\");\n"
" perror (cBuf);\n"
" delete [] cBuf;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" char *cBuf = new char[11];\n"
" sprintf(cBuf,\"%s\",\"testtest..\");\n"
" perror (cBuf);\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (error) Memory leak: cBuf\n", errout.str());
}
// # 2668
void func22() {
check("void foo()\n"
"{\n"
" char * cpFile;\n"
" cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if(freopen(cpFile,\"w\",stdout)==0)\n"
" {\n"
" return;\n"
" }\n"
" delete [] cpFile;\n"
" fclose (stdout);\n"
"}");
ASSERT_EQUALS("[test.cpp:8]: (error) Memory leak: cpFile\n", errout.str());
check("void foo()\n"
"{\n"
" char * cpFile;\n"
" cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if(freopen(cpFile,\"w\",stdout)==0)\n"
" {\n"
" delete [] cpFile;\n"
" return;\n"
" }\n"
" fclose (stdout);\n"
"}");
ASSERT_EQUALS("[test.cpp:12]: (error) Memory leak: cpFile\n", errout.str());
check("void foo()\n"
"{\n"
" char * cpFile;\n"
" cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" if(freopen(cpFile,\"w\",stdout)==0)\n"
" {\n"
" delete [] cpFile;\n"
" return;\n"
" }\n"
" delete [] cpFile;\n"
" fclose (stdout);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
// # 2667
void func23() {
// check open() function
// ----------------------
check("int * foo()\n"
"{\n"
" char * cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" int file=open(cpFile,O_RDONLY);\n"
" if(file < -1)\n"
" {\n"
" return file;\n"
" }\n"
" delete [] cpFile;\n"
" return file;\n"
"}");
ASSERT_EQUALS("[test.cpp:8]: (error) Memory leak: cpFile\n", errout.str());
check("int * foo()\n"
"{\n"
" char * cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" int file=open(cpFile,O_RDONLY);\n"
" if(file < -1)\n"
" {\n"
" delete [] cpFile;\n"
" return file;\n"
" }\n"
" return file;\n"
"}");
ASSERT_EQUALS("[test.cpp:11]: (error) Memory leak: cpFile\n", errout.str());
check("int * foo()\n"
"{\n"
" char * cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" int file=open(cpFile,O_RDONLY);\n"
" if(file < -1)\n"
" {\n"
" delete [] cpFile;\n"
" return file;\n"
" }\n"
" delete [] cpFile;\n"
" return file;\n"
"}");
ASSERT_EQUALS("", errout.str());
// check for _open, _wopen
// http://msdn.microsoft.com/en-us/library/z0kc8e3z(VS.80).aspx
// -------------------------------------------------------------
check("int * foo()\n"
"{\n"
" char * cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" int file=_open(cpFile,_O_RDONLY);\n"
" if(file == -1)\n"
" {\n"
" return file;\n"
" }\n"
" delete [] cpFile;\n"
" return file;\n"
"}");
ASSERT_EQUALS("[test.cpp:8]: (error) Memory leak: cpFile\n", errout.str());
check("int * foo()\n"
"{\n"
" char * cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" int file=_open(cpFile,_O_RDONLY);\n"
" if(file == -1)\n"
" {\n"
" delete [] cpFile;\n"
" return file;\n"
" }\n"
" return file;\n"
"}");
ASSERT_EQUALS("[test.cpp:11]: (error) Memory leak: cpFile\n", errout.str());
check("int * foo()\n"
"{\n"
" char * cpFile = new char [13];\n"
" strcpy (cpFile, \"testfile.txt\");\n"
" int file=_open(cpFile,_O_RDONLY);\n"
" if(file == -1)\n"
" {\n"
" delete [] cpFile;\n"
" return file;\n"
" }\n"
" delete [] cpFile;\n"
" return file;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
// #2705
void func24() {
check("void f(void)\n"
"{\n"
" std::string *x = new std::string;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Memory leak: x\n", errout.str());
check("void f(void)\n"
"{\n"
" std::string *x = new std::string;\n"
" delete x;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func25() { // ticket #2904
check("class Fred { };\n"
"void f(void)\n"
"{\n"
" Fred *f = new Fred();\n"
" delete f;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("class Fred { };\n"
"void f(void)\n"
"{\n"
" Fred *f = new Fred();\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: f\n", errout.str());
check("class Fred { void foo(){ } };\n"
"void f(void)\n"
"{\n"
" Fred *f = new Fred();\n"
" delete f;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("class Fred { void foo(){ } };\n"
"void f(void)\n"
"{\n"
" Fred *f = new Fred();\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: f\n", errout.str());
}
void func26() { // ticket #3444
// technically there is a leak here. However warning is not wanted
check("void f() {\n"
" char *p = strdup(\"A=B\");\n"
" putenv(p);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void func27() { // ticket #2773
check("void f(FRED *pData)\n"
"{\n"
" pData =(FRED*)malloc( 100 );\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Memory leak: pData\n", errout.str());
check("void f(int *pData)\n"
"{\n"
" pData =(int*)malloc( 100 );\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Memory leak: pData\n", errout.str());
}
void func28() { // ticket #3236
check("void f()\n"
"{\n"
" my_struct *p = malloc(42);\n"
" p->a + p->b;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: p\n", errout.str());
}
void allocfunc1() {
check("static char *a()\n"
"{\n"
" return new char[100];\n"
"}\n"
"static void b()\n"
"{\n"
" char *p = a();\n"
"}");
ASSERT_EQUALS(std::string("[test.cpp:8]: (error) Memory leak: p\n"), errout.str());
check("FILE *a()\n"
"{\n"
" return fopen(\"test.txt\",\"w\");\n"
"}\n"
"static void b()\n"
"{\n"
" FILE *p = a();\n"
"}");
ASSERT_EQUALS(std::string("[test.cpp:8]: (error) Resource leak: p\n"), errout.str());
check("char *a()\n"
"{\n"
" return malloc(10);\n"
"}\n"
"static void b()\n"
"{\n"
" char *p = a();\n"
"}");
ASSERT_EQUALS(std::string("[test.cpp:8]: (error) Memory leak: p\n"), errout.str());
}
void allocfunc2() {
check("static char *a(int size)\n"
"{\n"
" return new char[size];\n"
"}\n"
"static void b()\n"
"{\n"
" int len = 100;\n"
" char *p = a(len);\n"
" delete [] p;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("char *a(char *a)\n"
"{\n"
" return realloc(a, 10);\n"
"}\n"
"static void b()\n"
"{\n"
" char *p = a(0);\n"
" char *q = a(p);\n"
" if (q)\n"
" free(q);\n"
" else\n"
" free(p);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("char *a()\n"
"{\n"
" return malloc(10);\n"
"}\n"
"static void b()\n"
"{\n"
" char *p = a();\n"
" free(p);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void allocfunc3() {
check("static char *a()\n"
"{\n"
" char *data = malloc(10);;"
" return data;\n"
"}\n"
"static void b()\n"
"{\n"
" char *p = a();\n"
"}");
ASSERT_EQUALS(std::string("[test.cpp:8]: (error) Memory leak: p\n"), errout.str());
}
void allocfunc4() {
check("char* foo()\n"
"{\n"
" char *str = NULL;\n"
" str = realloc( str, 20 );\n"
" return str;\n"
"}\n"
"\n"
"void bar()\n"
"{\n"
" char *p = foo();\n"
"}");
ASSERT_EQUALS(std::string("[test.cpp:11]: (error) Memory leak: p\n"), errout.str());
check("char* foo()\n"
"{\n"
" char *str = NULL;\n"
" str = realloc( str, 20 );\n"
" return str;\n"
"}\n"
"\n"
"void bar()\n"
"{\n"
" char *p = foo();\n"
" delete p;\n"
"}");
ASSERT_EQUALS(std::string("[test.cpp:11]: (error) Mismatching allocation and deallocation: p\n"), errout.str());
}
void allocfunc5() {
check("void foo(char **str)\n"
"{\n"
" *str = malloc(20);\n"
"}\n"
"\n"
"void bar()\n"
"{\n"
" char *p;\n"
" foo(&p);\n"
"}");
ASSERT_EQUALS(std::string("[test.cpp:10]: (error) Memory leak: p\n"), errout.str());
check("void foo(char **str)\n"
"{\n"
" *str = malloc(20);\n"
"}\n"
"\n"
"void bar()\n"
"{\n"
" char *p;\n"
" foo(&p);\n"
" delete p;\n"
"}");
ASSERT_EQUALS(std::string("[test.cpp:10]: (error) Mismatching allocation and deallocation: p\n"), errout.str());
check("void foo(char **q, char **str)\n"
"{\n"
" *str = malloc(20);\n"
"}\n"
"\n"
"void bar()\n"
"{\n"
" char *p;\n"
" char *q;\n"
" foo(&q, &p);\n"
"}");
ASSERT_EQUALS(std::string("[test.cpp:11]: (error) Memory leak: p\n"), errout.str());
check("void foo(char **str)\n"
"{\n"
" char *a = malloc(20);\n"
" *str = a;\n"
"}\n"
"\n"
"void bar()\n"
"{\n"
" char *p;\n"
" foo(&p);\n"
"}");
TODO_ASSERT_EQUALS(std::string("[test.cpp:11]: (error) Memory leak: p\n"),
"", errout.str());
check("void foo(char **str)\n"
"{\n"
" free(*str);\n"
" *str = malloc(20);\n"
"}\n"
"\n"
"void bar()\n"
"{\n"
" char *tmp = malloc(10);\n"
" foo(&tmp);\n"
" foo(&tmp);\n"
" free(tmp);\n"
"}");
ASSERT_EQUALS("", errout.str());
//#ticket 1789: getcode other function:
check("void foo(char **str)\n"
"{\n"
" if (*str == NULL)\n"
" *str = malloc(20)\n;"
" else\n"
" *str = realloc(*str, 20)\n;"
"}\n"
"\n"
"void bar()\n"
"{\n"
" char *tmp = malloc(10);\n"
" foo(&tmp);\n"
" foo(&tmp);\n"
" free(tmp);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("int alloc(char **str) {\n"
" *str = malloc(20);\n"
" if (condition) { free(str); return -123; }\n"
" return 0;\n"
"}\n"
"\n"
"void bar()\n"
"{\n"
" char *p;\n"
" if ((ret = alloc(&p)) != 0) return;\n"
" free(p);\n"
"}");
ASSERT_EQUALS(std::string(""), errout.str());
}
void allocfunc6() {
check("static FILE* data()\n"
"{\n"
" return fopen(\"data.txt\",\"rt\");\n"
"}\n"
"\n"
"static void foo()\n"
"{\n"
" char* expr;\n"
" func(&expr);\n"
"\n"
" FILE *f = data();\n"
" fclose(f);\n"
"\n"
" free(expr);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void allocfunc7() {
// Ticket #2374 - no false positive
check("char *data()\n"
"{\n"
" char *s = malloc(100);\n"
" strings[0] = s;\n"
" return s;\n"
"}\n"
"\n"
"static void foo()\n"
"{\n"
" char* s = data();\n"
"}");
ASSERT_EQUALS("", errout.str());
// #5144
check("C* BuildC( C *previous ) {\n"
" C *result = malloc(100);\n"
" result->previous = previous;\n"
" return result;\n"
"}\n"
"C *ParseC( ) {\n"
" C *expr1 = NULL;\n"
" while( something() )\n"
" expr1 = BuildC(expr1);\n"
" return expr1;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void allocfunc8() {
// Ticket #2213 - calling alloc function twice
check("FILE *foo() {\n"
" return fopen(a,b);\n"
"}\n"
"\n"
"void bar() {\n"
" FILE *f = foo();\n"
" f = foo();\n"
" fclose(f);\n"
"}");
ASSERT_EQUALS("[test.cpp:7]: (error) Resource leak: f\n", errout.str());
}
void allocfunc9() {
// Ticket #2673 - address is taken in alloc func
check("char *addstring(const char *s) {\n"
" char *ret = strdup(s);\n"
" strings.push_back(ret);"
" return ret;\n"
"}\n"
"\n"
"void foo() {\n"
" char *s = addstring(\"abc\");\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void allocfunc10() {
// Ticket #2921 - static pointer
check("char *getstr() {\n"
" static char *ret = malloc(100);\n"
" return ret;\n"
"}\n"
"\n"
"void foo() {\n"
" char *s = getstr();\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void allocfunc11() { // ticket #3809 - false positive
check("void f (double * & data_val) {\n"
" data_val = malloc(0x100);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void allocfunc12() { // #3660: allocating and returning non-local pointer => not allocfunc
check("char *p;\n" // global pointer
"char *a() {\n"
" if (!p) p = malloc(10);\n"
" return p;\n"
"}\n"
"void b() {\n"
" char *x = a();\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void allocfunc13() { // #4494: class function
check("namespace n {\n"
" char *a() { return malloc(100); }\n"
"}\n"
"void b() {\n"
" char *x = n::a();\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (error) Memory leak: x\n", errout.str());
check("class C {\n" // ¤4540
" char *a() { return malloc(100); }\n"
"}\n"
"void b() {\n"
" C c;"
" char *x = c.a();\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (error) Memory leak: x\n", errout.str());
check("class Pool{\n"
" int* GetNewObj()\n"
" {\n"
" return new int;\n"
" }\n"
"};\n"
"void foo(){\n"
" Pool pool;\n"
" int* a = pool.GetNewObj();\n"
" int* b = GetNewObj();\n"
"}");
ASSERT_EQUALS("[test.cpp:11]: (error) Memory leak: a\n", errout.str());
}
void allocfunc14() { // use pointer before returning it
check("static struct ABC * newabc() {\n"
" struct ABC *abc = malloc(sizeof(struct ABC));\n"
" init_abc(&abc->a);\n" // <- might take address
" return abc;\n"
"}\n"
"\n"
"static void f() {\n"
" struct ABC *abc = newabc();\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void inlineFunction() { // #3989 - inline function
check("int test() {\n"
" char *c;\n"
" int ret() {\n"
" free(c);\n"
" return 0;\n"
" }\n"
" c = malloc(128);\n"
" return ret();\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void throw1() {
check("void foo()\n"
"{\n"
" char *str = new char[10];\n"
" if ( ! abc )\n"
" throw 123;\n"
" delete [] str;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: str\n", errout.str());
}
void throw2() {
check("void foo()\n"
"{\n"
" char *str = 0;\n"
" try\n"
" {\n"
" str = new char[100];\n"
" if ( somecondition )\n"
" throw exception;\n"
" delete [] str;\n"
" }\n"
" catch ( ... )\n"
" {\n"
" delete [] str;\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void linux_list_1() {
check("struct AB\n"
"{\n"
" int a;\n"
" int b;\n"
"};\n"
"void foo()\n"
"{\n"
" struct AB *ab = new AB;\n"
" func(&ab->a);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void linux_list_2() { // #5993
check("void foo() {\n"
" struct AB *ab = malloc(sizeof(struct AB));\n"
" list_add_tail(&(ab->list));\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void sizeof1() {
check("void f()\n"
"{\n"
" struct s_t s1;\n"
" struct s_t cont *p = &s1;\n"
" struct s_t *s2;\n"
"\n"
" memset(p, 0, sizeof(*p));\n"
"\n"
" s2 = (struct s_t *) malloc(sizeof(*s2));\n"
"\n"
" if (s2->value != 0)\n"
" return;\n"
"\n"
" free(s2);\n"
"\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:12]: (error) Memory leak: s2\n", errout.str());
}
void realloc1() {
check("void foo()\n"
"{\n"
" char *a = (char *)malloc(10);\n"
" a = realloc(a, 100);\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Common realloc mistake: \'a\' nulled but not freed upon failure\n"
"[test.cpp:5]: (error) Memory leak: a\n", errout.str());
}
void realloc2() {
check("void foo()\n"
"{\n"
" char *a = (char *)malloc(10);\n"
" a = (char *)realloc(a, 100);\n"
" free(a);\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Common realloc mistake: \'a\' nulled but not freed upon failure\n", errout.str());
}
void realloc3() {
check("void foo()\n"
"{\n"
" char *a = 0;\n"
" if ((a = realloc(a, 100)) == NULL)\n"
" return;\n"
" free(a);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void realloc4() {
check("void foo()\n"
"{\n"
" static char *a = 0;\n"
" if ((a = realloc(a, 100)) == NULL)\n"
" return;\n"
" free(a);\n"
"}");
TODO_ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: a\n",
"[test.cpp:4]: (error) Common realloc mistake: \'a\' nulled but not freed upon failure\n",
errout.str());
}
void realloc5() {
check("void foo()\n"
"{\n"
" char *buf;\n"
" char *new_buf;\n"
" buf = calloc( 10 );\n"
" new_buf = realloc ( buf, 20);\n"
" if ( !new_buf )\n"
" free(buf);\n"
" else\n"
" free(new_buf);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void realloc6() {
ASSERT_EQUALS(";;realloc;;", getcode("char *buf; buf=realloc(buf,100);", "buf"));
ASSERT_EQUALS(";;alloc;", getcode("char *buf; buf=realloc(0,100);", "buf"));
}
void realloc7() {
check("bool foo(size_t nLen, char* pData)\n"
"{\n"
" pData = (char*) realloc(pData, sizeof(char) + (nLen + 1)*sizeof(char));\n"
" if ( pData == NULL )\n"
" {\n"
" return false;\n"
" }\n"
" free(pData);\n"
" return true;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void realloc8() {
check("void foo()\n"
"{\n"
" char *origBuf = m_buf;\n"
" m_buf = (char *) realloc (m_buf, m_capacity + growBy);\n"
" if (!m_buf) {\n"
" m_buf = origBuf;\n"
" }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void realloc9() {
check("void foo()\n"
"{\n"
" x = realloc(x,100);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void realloc10() {
check("void foo() {\n"
" char *pa, *pb;\n"
" pa = pb = malloc(10);\n"
" pa = realloc(pa, 20);"
" exit();\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void realloc11() {
check("void foo() {\n"
" char *p;\n"
" p = realloc(p, size);\n"
" if (!p)\n"
" error();\n"
" usep(p);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void realloc12() {
check("void foo(int x)\n"
"{\n"
" char *a = 0;\n"
" if ((a = realloc(a, x + 100)) == NULL)\n"
" return;\n"
" free(a);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void realloc13() {
check("void foo()\n"
"{\n"
" char **str;\n"
" *str = realloc(*str,100);\n"
" free (*str);\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Common realloc mistake: \'str\' nulled but not freed upon failure\n", errout.str());
}
void realloc14() {
check("void foo() {\n"
" char *p;\n"
" p = realloc(p, size + 1);\n"
" if (!p)\n"
" error();\n"
" usep(p);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void realloc15() {
check("bool foo() {\n"
" char ** m_options;\n"
" m_options = (char**)realloc( m_options, 2 * sizeof(char*));\n"
" if( m_options == NULL )\n"
" return false;\n"
" return true;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (error) Common realloc mistake: \'m_options\' nulled but not freed upon failure\n"
"[test.cpp:6]: (error) Memory leak: m_options\n", errout.str());
}
void realloc16() {
check("void f(char *zLine) {\n"
" zLine = realloc(zLine, 42);\n"
" if (zLine) {\n"
" free(zLine);\n"
" }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void assign1() {
check("void foo()\n"
"{\n"
" char *a = (char *)malloc(10);\n"
" a = 0;\n"
" free(a);\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Memory leak: a\n", errout.str());
check("void foo()\n"
"{\n"
" char *a = (char *)malloc(10);\n"
" char *p = a;\n"
" free(p);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" char *a = (char *)malloc(10);\n"
" char *p = a + 1;\n"
" free(p);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" char *a = (char *)malloc(10);\n"
" a += 10;\n"
" free(a - 10);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" char *a = (char *)malloc(10);\n"
" a = (void *)a + 10;\n"
" free(a - 10);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" char *a = new char[100];\n"
" list += a;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void varid() {
check("void foo()\n"
"{\n"
" char *p = malloc(100);\n"
" {\n"
" char *p = 0;\n"
" delete p;\n"
" }\n"
" free(p);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void cast1() {
check("void foo()\n"
"{\n"
" char *a = reinterpret_cast<char *>(malloc(10));\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Memory leak: a\n", errout.str());
}
void dealloc_use() {
// It is ok to take the address..
check("void f()\n"
"{\n"
" char *s = new char[100];\n"
" delete [] s;\n"
" p = s;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" char *s = new char[100];\n"
" delete [] s;\n"
" foo(s);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" char *s = new char[100];\n"
" delete [] s;\n"
" printf(\"%p\\n\", s);\n"
"}");
ASSERT_EQUALS("", errout.str());
// The pointer to the pointer is valid..
check("void f()\n"
"{\n"
" char *str;\n"
" free(str);\n"
" foo(&str);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" char *str = 0;\n"
" free(str);\n"
" f1(&str);\n"
" f2(str);\n"
"}");
ASSERT_EQUALS("", errout.str());
// Dereferencing the freed pointer is not ok..
check("void foo()\n"
"{\n"
" char *str = malloc(10);\n"
" free(str);\n"
" char c = *str;\n"
"}");
TODO_ASSERT_EQUALS("[test.cpp:5]: (error) Dereferencing 'str' after it is deallocated / released\n",
"", errout.str());
check("void foo()\n"
"{\n"
" char *str = malloc(10);\n"
" free(str);\n"
" char c = str[10];\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Dereferencing 'str' after it is deallocated / released\n", errout.str());
check("void foo()\n"
"{\n"
" char *str = malloc(10);\n"
" free(str);\n"
" str[10] = 0;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Dereferencing 'str' after it is deallocated / released\n", errout.str());
check("void foo() {\n"
" char *str = malloc(10);\n"
" free(str);\n"
" strcpy(str, p);\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Dereferencing 'str' after it is deallocated / released\n", errout.str());
check("void foo(int x) {\n"
" char *str = malloc(10);\n"
" free(str);\n"
" assert(x);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void dealloc_use_2() {
// #3041 - assigning pointer when it's used
check("void f(char *s) {\n"
" free(s);\n"
" strcpy(a, s=b());\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void dealloc_use_3() {
check("void foo()\n"
"{\n"
" char *str = malloc(10);\n"
" realloc(str, 0);\n"
" str[10] = 0;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Dereferencing 'str' after it is deallocated / released\n", errout.str());
check("void foo()\n"
"{\n"
" char *str = realloc(0, 10);\n"
" realloc(str, 0);\n"
" str[10] = 0;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Dereferencing 'str' after it is deallocated / released\n", errout.str());
}
void freefree1() {
check("void foo()\n"
"{\n"
" char *str = malloc(100);\n"
" free(str);\n"
" free(str);\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Deallocating a deallocated pointer: str\n", errout.str());
}
void freefree2() {
check("void foo()\n"
"{\n"
" FILE *fd = fopen(\"test.txt\", \"wb\");\n"
" fprintf(fd, \"test\");\n"
" fclose(fd);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void freefree3() {
check("void foo()\n"
"{\n"
" char *p = malloc(10);\n"
" free(p);\n"
" bar(&p);\n"
" free(p);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void strcpy_result_assignment() {
check("void foo()\n"
"{\n"
" char *p1 = malloc(10);\n"
" char *p2 = strcpy(p1, \"a\");\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void strcat_result_assignment() {
check("void foo()\n"
"{\n"
" char *p = malloc(10);\n"
" p[0] = 0;\n"
" p = strcat( p, \"a\" );\n"
" free( p );\n"
" return 0;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void all1() {
check("void foo()\n"
"{\n"
" Fred *f = new Fred;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void malloc_constant_1() {
check("void foo()\n"
"{\n"
" int *p = malloc(3);\n"
" free(p);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (error) The allocated size 3 is not a multiple of the underlying type's size.\n", errout.str());
}
void unknownFunction1() {
check("void foo()\n"
"{\n"
" int *p = new int[100];\n"
" if (abc)\n"
" {\n"
" delete [] p;\n"
" ThrowException();\n"
" }\n"
" delete [] p;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void unknownFunction2() {
check("void foo()\n"
"{\n"
" int *p = new int[100];\n"
" if (abc)\n"
" {\n"
" delete [] p;\n"
" ThrowException();\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:9]: (error) Memory leak: p\n", errout.str());
check("void foo()\n"
"{\n"
" int *p = new int[100];\n"
" p = g();\n"
" delete [] p;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Memory leak: p\n", errout.str());
}
void unknownFunction4() {
check("void foo()\n"
"{\n"
" int *p = new int[100];\n"
" a();\n"
" if (b) return;\n"
" delete [] p;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: p\n", errout.str());
}
void unknownFunction5() {
check("static void foo()\n"
"{\n"
" char *p = NULL;\n"
"\n"
" if( a )\n"
" p = malloc(100);\n"
"\n"
" if( a )\n"
" {\n"
" FREENULL(p);\n"
" FREENULL();\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void class1() {
check("class Fred\n"
"{\n"
"public:\n"
" Fred()\n"
" {\n"
" int *p = new int[100];\n"
" }\n"
"};");
ASSERT_EQUALS("[test.cpp:7]: (error) Memory leak: p\n", errout.str());
}
void class2() {
check("class Fred {\n"
"public:\n"
" Fred() : rootNode(0) {}\n"
"\n"
"private:\n"
" struct Node {\n"
" Node(Node* p) {\n"
" parent = p;\n"
" if (parent) {\n"
" parent->children.append(this);\n"
" }\n"
" }\n"
"\n"
" ~Node() {\n"
" qDeleteAll(children);\n"
" }\n"
"\n"
" QList<Node*> children;\n"
" };\n"
"\n"
" Node rootNode;\n"
"\n"
" void f() {\n"
" Node* recordNode = new Node(&rootNode);\n"
" }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void autoptr1() {
check("std::auto_ptr<int> foo()\n"
"{\n"
" int *i = new int;\n"
" return std::auto_ptr<int>(i);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void if_with_and() {
check("void f()\n"
"{\n"
" char *a = new char[10];\n"
" if (!a && b() )\n"
" return;\n"
"\n"
" delete [] a;\n"
"}", false, false, true);
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" char *a = new char[10];\n"
" if (b() && !a )\n"
" return;\n"
"\n"
" delete [] a;\n"
"}", false, false, true);
ASSERT_EQUALS("", errout.str());
}
void assign_pclose() {
check("void f() {\n"
" FILE *f = popen (\"test\", \"w\");\n"
" int a = pclose(f);\n"
"}", false, true);
ASSERT_EQUALS("", errout.str());
}
void conditional_dealloc_return() { // #7820
check("void f() {\n"
" FILE *pPipe = popen(\"foo\", \"r\");\n"
" if (feof(pPipe))\n"
" pclose(pPipe);\n"
" return;\n"
"}", /*c=*/true, /*posix=*/true);
ASSERT_EQUALS("[test.c:5]: (error) Resource leak: pPipe\n", errout.str());
check("extern int bar();\n"
"void f() {\n"
" char *c = (char*) malloc(10);\n"
" if (bar())\n"
" free(c);\n"
" return;\n"
"}", /*c=*/true);
ASSERT_EQUALS("[test.c:6]: (error) Memory leak: c\n", errout.str());
check("extern int bar();\n"
"extern int baz();\n"
"extern void bos(char*);\n"
"void f() {\n"
" char *c;\n"
" if(bar()) {\n"
" bos(c);\n"
" c = (char*) malloc(10);\n"
" if (baz())\n"
" free(c);\n"
" };\n"
"}", /*c=*/true);
ASSERT_EQUALS("[test.c:11]: (error) Memory leak: c\n", errout.str());
}
void exit2() {
check("void f()\n"
"{\n"
" char *out = new char[100];\n"
" exit(0);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" char *out = new char[100];\n"
" if( out ) {}\n"
" exit(0);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void exit4() {
check("void f()\n"
"{\n"
" char *p = malloc(100);\n"
" if (x)\n"
" {\n"
" exit(0);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:8]: (error) Memory leak: p\n", errout.str());
}
void exit5() {
check("void f()\n"
"{\n"
" char *p = malloc(100);\n"
" if (p)\n"
" {\n"
" xyz();\n"
" exit(0);\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void exit6() {
check("int main(int argc, char *argv[]) {\n"
" FILE *sfile;\n"
" unsigned long line;\n"
" sfile = fopen(\"bar\", \"r\");\n"
" if (!sfile)\n"
" return 1;\n"
" for(line = 0; ; line++) {\n"
" if (argc > 3)\n"
" break;\n"
" exit(0);\n"
" }\n"
" fclose(sfile);\n"
" exit(0);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void exit7() {
check("int a(int x) {\n"
" if (x == 0) {\n"
" exit(0);\n"
" }\n"
" return x + 2;\n"
"}\n"
"\n"
"void b() {\n"
" char *p = malloc(100);\n"
" int i = a(123);\n"
"}");
ASSERT_EQUALS("[test.cpp:11]: (error) Memory leak: p\n", errout.str());
}
void noreturn() {
check("void fatal_error()\n"
"{ exit(1); }\n"
"\n"
"void f()\n"
"{\n"
" char *p = malloc(100);\n"
" fatal_error();\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void fatal_error()\n" // #2440
"{ }\n"
"\n"
"void f()\n"
"{\n"
" char *p = malloc(100);\n"
" fatal_error();\n"
"}");
ASSERT_EQUALS("[test.cpp:8]: (error) Memory leak: p\n", errout.str());
}
void strndup_function() {
check("void f() {\n"
" char *out = strndup(\"text\", 3);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Memory leak: out\n", errout.str());
}
void tmpfile_function() {
check("void f()\n"
"{\n"
" FILE *f = tmpfile();\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Resource leak: f\n", errout.str());
check("void f()\n"
"{\n"
" FILE *f = tmpfile();\n"
" if (!f)\n"
" return;\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (error) Resource leak: f\n", errout.str());
check("void f()\n"
"{\n"
" FILE *f = tmpfile();\n"
" fclose(f);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" FILE *f = tmpfile();\n"
" if (!f)\n"
" return;\n"
" fclose(f);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("FILE *f()\n"
"{\n"
" return tmpfile();\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void fcloseall_function() {
check("void f()\n"
"{\n"
" FILE *f = fopen(fname, str);\n"
" fcloseall();\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" FILE *f = tmpfile();\n"
" fcloseall();\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void open_function() {
check("void f(const char *path)\n"
"{\n"
" int fd = open(path, O_RDONLY);\n"
"}", false, true, true);
ASSERT_EQUALS("[test.cpp:4]: (error) Resource leak: fd\n", errout.str());
check("void f(const char *path)\n"
"{\n"
" int fd = open(path, O_RDONLY);\n"
" if (fd == -1)\n"
" return;\n"
" close(fd);\n"
"}", false, true, true);
ASSERT_EQUALS("", errout.str());
check("void f(const char *path)\n"
"{\n"
" int fd = open(path, O_RDONLY);\n"
" if (fd < 0)\n"
" return;\n"
" close(fd);\n"
"}", false, true, true);
ASSERT_EQUALS("", errout.str());
check("void f(const char *path)\n"
"{\n"
" int fd = open(path, O_RDONLY);\n"
" if (-1 == fd)\n"
" return;\n"
" close(fd);\n"
"}", false, true, true);
ASSERT_EQUALS("", errout.str());
}
void creat_function() {
check("void f(const char *path)\n"
"{\n"
" int fd = creat(path, S_IRWXU);\n"
"}", false, true);
ASSERT_EQUALS("[test.cpp:4]: (error) Resource leak: fd\n", errout.str());
}
void close_function() {
check("void f(const char *path)\n"
"{\n"
" int fd = open(path, O_RDONLY);\n"
" close(fd);\n"
"}", false, true);
ASSERT_EQUALS("", errout.str());
check("void f(const char *path)\n"
"{\n"
" int fd = creat(path, S_IRWXU);\n"
" close(fd);\n"
"}", false, true);
ASSERT_EQUALS("", errout.str());
check("void f(const char *path)\n"
"{\n"
" int fd = creat(path, S_IRWXU);\n"
" if (close(fd) < 0) {\n"
" perror(\"close\");\n"
" }\n"
"}", false, true);
ASSERT_EQUALS("", errout.str());
//#ticket 1401
check("int myfunc()\n"
"{\n"
" int handle;\n"
"\n"
" handle = open(\"myfile\");\n"
" if (handle < 0) return 1;\n"
"\n"
" while (some_condition())\n"
" if (some_other_condition())\n"
" {\n"
" close(handle);\n"
" return 3;\n"
" }\n"
" close(handle);\n"
"}", false, true);
ASSERT_EQUALS("", errout.str());
//#ticket 1401
check("int myfunc()\n"
"{\n"
" int handle;\n"
"\n"
" handle = open(\"myfile\", O_RDONLY);\n"
" if (handle < 0) return 1;\n"
"\n"
" while (some_condition())\n"
" if (some_other_condition())\n"
" {\n"
" return 3;\n"
" }\n"
" close(handle);\n"
"}", false, true);
ASSERT_EQUALS("[test.cpp:11]: (error) Resource leak: handle\n", errout.str());
}
void fd_functions() {
check("void f(const char *path)\n"
"{\n"
" int fd = open(path, O_RDONLY);\n"
" read(fd, buf, count);\n"
" readv(fd, iov, iovcnt);\n"
" readahead(fd, offset, count);\n"
" pread(fd, buf, count, offset);\n"
" write(fd, buf, count);\n"
" writev(fd, iov, iovcnt);\n"
" pwrite(fd, buf, count, offset);\n"
" ioctl(fd, request);\n"
" posix_fallocate(fd, offset, len);\n"
" posix_fadvise(fd, offset, len, advise);\n"
" fsync(fd);\n"
" fdatasync(fd);\n"
" sync_file_range(fd, offset, nbytes, flags);\n"
" lseek(fd, offset, whence);\n"
" fcntl(fd, cmd);\n"
" flock(fd, op);\n"
" lockf(fd, cmd, len);\n"
" ftruncate(fd, len);\n"
" fstat(fd, buf);\n"
" fchmod(fd, mode);\n"
"}", false, true);
ASSERT_EQUALS("[test.cpp:24]: (error) Resource leak: fd\n", errout.str());
}
void file_functions() {
check("void f()\n"
"{\n"
"FILE *f = fopen(fname, str);\n"
"feof(f);\n"
"clearerr(in);\n"
"ferror(in);\n"
"fread(ptr, 10, 1, in);\n"
"fwrite(ptr, 10, 1, in);\n"
"fflush(in);\n"
"setbuf(in, buf);\n"
"setbuffer(in, buf, 100);\n"
"setlinebuf(in);\n"
"setvbuf(in, buf, _IOLBF, 0);\n"
"fseek(in, 10, SEEK_SET);\n"
"fseeko(in, 10, SEEK_SET);\n"
"ftell(in);\n"
"ftello(in);\n"
"rewind(in);\n"
"fsetpos(in, 0);\n"
"fgetpos(in, 10);\n"
"fprintf(in, \"text\\n\");\n"
"}");
ASSERT_EQUALS("[test.cpp:22]: (error) Resource leak: f\n", errout.str());
}
void getc_function() {
{
check("void f()\n"
"{"
" int c;\n"
" FILE *fin1a = fopen (\"FILE.txt\", \"r\");\n"
" while ( (c = getc (fin1a)) != EOF)\n"
" { }\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (error) Resource leak: fin1a\n", errout.str());
}
{
check("void f()\n"
"{\n"
" int c;\n"
" FILE *fin1b = fopen(\"FILE.txt\", \"r\");\n"
" c = getc(fin1b);\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (error) Resource leak: fin1b\n", errout.str());
}
}
void pointer_to_pointer() {
check("void f(char **data)\n"
"{\n"
" char *c = new char[12];\n"
" *c = 0;\n"
" *data = c;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void dealloc_and_alloc_in_func() {
check("char *f( const char *x )\n"
"{\n"
" delete [] x;\n"
" return new char[10];\n"
"}\n"
"\n"
"int main()\n"
"{\n"
" char *a=0;\n"
" a = f( a );\n"
" a[0] = 1;\n"
" delete [] a;\n"
" return 0;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void unknownSyntax1() {
// I don't know what this syntax means so cppcheck should bail out
check("void foo()\n"
"{\n"
" void *sym = ( {\n"
" void *__ptr = malloc(100);\n"
" if(!__ptr && 100 != 0)\n"
" {\n"
" exit(1);\n"
" }\n"
" __ptr;\n"
" } );\n"
" free(sym);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void knownFunctions() {
check("void foo()\n"
"{\n"
" int *p = new int[100];\n"
" typeid(p);\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: p\n", errout.str());
}
void same_function_name() {
check("void a(char *p)\n"
"{ }\n"
"void b()\n"
"{\n"
" char *p = malloc(10);\n"
" abc.a(p);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void functionParameter() {
check("void a(char *p)\n"
"{\n"
" p = malloc(100);\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (error) Memory leak: p\n", errout.str());
}
// Ticket #2014 - setjmp / longjmp
void jmp() {
check("int main()\n"
"{\n"
" jmp_buf env;\n"
" int val;\n"
" char *a;\n"
"\n"
" val = setjmp(env);\n"
" if(val)\n"
" {\n"
" delete a;\n"
" return 0;\n"
" }\n"
"\n"
" a = new char(1);\n"
" longjmp(env, 1);\n"
"\n"
" return 0;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void trac1949() {
check("int fn()\n"
"{\n"
" char * buff = new char[100];\n"
" assert (buff);\n"
" return 0;\n"
"}"
);
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: buff\n", errout.str());
}
void trac2540() {
check("void f()\n"
"{\n"
" char* str = strdup(\"abc def\");\n"
" char *name = strtok(str, \" \");\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: str\n", errout.str());
check("void f(char *cBuf)\n"
"{\n"
" char* str = strdup(*cBuf);\n"
" char *name = strtok(str, \" \");\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: str\n", errout.str());
}
void trac2662() {
// segfault because of endless recursion
// call_func -> getAllocationType -> functionReturnType -> call_func ..
check("char *foo() {\n"
" return foo();\n"
"}\n"
"\n"
"void bar() {\n"
" char *s = foo();\n"
"}");
ASSERT_EQUALS("", errout.str());
check("char *foo() {\n"
" char *s = foo();\n"
" return s;\n"
"}\n"
"\n"
"void bar() {\n"
" char *s = foo();\n"
"}");
ASSERT_EQUALS("", errout.str());
check("int shl()\n"
"{\n"
" int a = shr();\n"
" return a;\n"
"}\n"
"\n"
"int shr()\n"
"{\n"
" return shl();\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void trac1879() {
// #1879 non regression test case
check("void test() {\n"
"int *a = new int[10];\n"
"try {}\n"
"catch(...) {}\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: a\n", errout.str());
}
void ptrptr() {
check("void f() {\n"
" char *p;\n"
" char **pp = &p;\n"
" *pp = calloc(10, 1);\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: p\n", errout.str());
}
void c_code() {
check("int main(void) {\n"
" struct llist *ll = malloc(sizeof(struct llist));\n"
" free(ll);\n"
" ll = NULL;\n"
" delete(ll, ll->top);\n"
"}", true);
ASSERT_EQUALS("", errout.str());
}
void gnucfg() {
Settings settings;
LOAD_LIB_2(settings.library, "gnu.cfg");
const char code[] = "void leak() {\n"
" char * p = get_current_dir_name();\n" // memory leak
"}\n"
"void noLeak() {\n"
" char * p = get_current_dir_name();\n"
" free(p)\n;"
"}";
check(code, false, true, false, &settings);
ASSERT_EQUALS("[test.cpp:3]: (error) Memory leak: p\n", errout.str());
}
void trac3991() {
check("int read_chunk_data(char **buffer) {\n"
" *buffer = (char *)malloc(chunk->size);\n"
" if (*buffer == NULL)\n"
" return -1;\n"
" return 0;\n"
"}\n"
"void printf_chunk_recursive() {\n"
" UINT8 *data = NULL;\n"
" int avierr = read_chunk_data(&data);\n"
" if (avierr == 0)\n"
" free(data);\n"
"}", true);
ASSERT_EQUALS("", errout.str());
}
void crash() {
check("class ComponentDC {\n"
" ::Component * getComponent();\n"
"};\n"
"::Component * ComponentDC::getComponent() {\n"
" return ((::Component *)myComponent);\n"
"}\n"
"class MultiComponentDC : public ComponentDC {\n"
" virtual void addChild(InterfaceNode *);\n"
"};\n"
"void MultiComponentDC::addChild(InterfaceNode *childNode) {\n"
" ComponentDC *cdc = dynamic_cast<ComponentDC *>(childNode);\n"
" if (cdc)\n"
" ::Component *c = cdc->getComponent();\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void trac7680() {
check("void foo() {\n"
" int *i = ::new int;\n"
" ::delete i;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void trac7440() {
check("int main(void) {\n"
" char* data = new char[100];\n"
" char** dataPtr = &data;\n"
" printf(\"test\");\n"
" delete [] *dataPtr;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
};
REGISTER_TEST(TestMemleakInFunction)
class TestMemleakInClass : public TestFixture {
public:
TestMemleakInClass() : TestFixture("TestMemleakInClass") {
}
private:
Settings settings;
/**
* Tokenize and execute leak check for given code
* @param code Source code
*/
void check(const char code[]) {
// Clear the error buffer..
errout.str("");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
// Check for memory leaks..
CheckMemoryLeakInClass checkMemoryLeak(&tokenizer, &settings, this);
checkMemoryLeak.check();
}
void run() {
settings.addEnabled("warning");
settings.addEnabled("style");
LOAD_LIB_2(settings.library, "std.cfg");
TEST_CASE(class1);
TEST_CASE(class2);
TEST_CASE(class3);
TEST_CASE(class4);
TEST_CASE(class6);
TEST_CASE(class7);
TEST_CASE(class8);
TEST_CASE(class9);
TEST_CASE(class10);
TEST_CASE(class11);
TEST_CASE(class12);
TEST_CASE(class13);
TEST_CASE(class14);
TEST_CASE(class15);
TEST_CASE(class16);
TEST_CASE(class17);
TEST_CASE(class18);
TEST_CASE(class19); // ticket #2219
TEST_CASE(class20);
TEST_CASE(class21); // ticket #2517
TEST_CASE(class22); // ticket #3012
TEST_CASE(class23); // ticket #3303
TEST_CASE(class24); // ticket #3806 - false positive in copy constructor
TEST_CASE(class25); // ticket #4367 - false positive implementation for destructor is not seen
TEST_CASE(staticvar);
TEST_CASE(free_member_in_sub_func);
TEST_CASE(mismatch1);
TEST_CASE(mismatch2); // #5659
// allocating member variable in public function
TEST_CASE(func1);
TEST_CASE(func2);
}
void class1() {
check("class Fred\n"
"{\n"
"private:\n"
" char *str1;\n"
" char *str2;\n"
"public:\n"
" Fred();\n"
" ~Fred();\n"
"};\n"
"\n"
"Fred::Fred()\n"
"{\n"
" str1 = new char[10];\n"
" str2 = new char[10];\n"
"}\n"
"\n"
"Fred::~Fred()\n"
"{\n"
" delete [] str2;\n"
"}");
ASSERT_EQUALS("[test.cpp:4]: (style) Class 'Fred' is unsafe, 'Fred::str1' can leak by wrong usage.\n", errout.str());
check("class Fred\n"
"{\n"
"private:\n"
" char *str1;\n"
" char *str2;\n"
"public:\n"
" Fred()\n"
" {\n"
" str1 = new char[10];\n"
" str2 = new char[10];\n"
" }\n"
" ~Fred()\n"
" {\n"
" delete [] str2;\n"
" }\n"
"};");
ASSERT_EQUALS("[test.cpp:4]: (style) Class 'Fred' is unsafe, 'Fred::str1' can leak by wrong usage.\n", errout.str());
}
void class2() {
check("class Fred\n"
"{\n"
"private:\n"
" char *str1;\n"
"public:\n"
" Fred();\n"
" ~Fred();\n"
"};\n"
"\n"
"Fred::Fred()\n"
"{\n"
" str1 = new char[10];\n"
"}\n"
"\n"
"Fred::~Fred()\n"
"{\n"
" free(str1);\n"
"}");
ASSERT_EQUALS("[test.cpp:17]: (error) Mismatching allocation and deallocation: Fred::str1\n", errout.str());
check("class Fred\n"
"{\n"
"private:\n"
" char *str1;\n"
"public:\n"
" Fred()\n"
" {\n"
" str1 = new char[10];\n"
" }\n"
" ~Fred()\n"
" {\n"
" free(str1);\n"
" }\n"
"};");
ASSERT_EQUALS("[test.cpp:12]: (error) Mismatching allocation and deallocation: Fred::str1\n", errout.str());
}
void class3() {
check("class Token;\n"
"\n"
"class Tokenizer\n"
"{\n"
"private:\n"
" Token *_tokens;\n"
"\n"
"public:\n"
" Tokenizer();\n"
" ~Tokenizer();\n"
" void deleteTokens(Token *tok);\n"
"};\n"
"\n"
"Tokenizer::Tokenizer()\n"
"{\n"
" _tokens = new Token;\n"
"}\n"
"\n"
"Tokenizer::~Tokenizer()\n"
"{\n"
" deleteTokens(_tokens);\n"
"}\n"
"\n"
"void Tokenizer::deleteTokens(Token *tok)\n"
"{\n"
" while (tok)\n"
" {\n"
" Token *next = tok->next();\n"
" delete tok;\n"
" tok = next;\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
check("class Token;\n"
"\n"
"class Tokenizer\n"
"{\n"
"private:\n"
" Token *_tokens;\n"
"\n"
"public:\n"
" Tokenizer()\n"
" {\n"
" _tokens = new Token;\n"
" }\n"
" ~Tokenizer()\n"
" {\n"
" deleteTokens(_tokens);\n"
" }\n"
" void deleteTokens(Token *tok)\n"
" {\n"
" while (tok)\n"
" {\n"
" Token *next = tok->next();\n"
" delete tok;\n"
" tok = next;\n"
" }\n"
" }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void class4() {
check("struct ABC;\n"
"class Fred\n"
"{\n"
"private:\n"
" void addAbc(ABC *abc);\n"
"public:\n"
" void click();\n"
"};\n"
"\n"
"void Fred::addAbc(ABC* abc)\n"
"{\n"
" AbcPosts->Add(abc);\n"
"}\n"
"\n"
"void Fred::click()\n"
"{\n"
" ABC *p = new ABC;\n"
" addAbc( p );\n"
"}");
ASSERT_EQUALS("", errout.str());
check("struct ABC;\n"
"class Fred\n"
"{\n"
"private:\n"
" void addAbc(ABC* abc)\n"
" {\n"
" AbcPosts->Add(abc);\n"
" }\n"
"public:\n"
" void click()\n"
" {\n"
" ABC *p = new ABC;\n"
" addAbc( p );\n"
" }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void class6() {
check("class Fred\n"
"{\n"
"public:\n"
" void foo();\n"
"};\n"
"\n"
"void Fred::foo()\n"
"{\n"
" char *str = new char[100];\n"
" delete [] str;\n"
" hello();\n"
"}");
ASSERT_EQUALS("", errout.str());
check("class Fred\n"
"{\n"
"public:\n"
" void foo()\n"
" {\n"
" char *str = new char[100];\n"
" delete [] str;\n"
" hello();\n"
" }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void class7() {
check("class Fred\n"
"{\n"
"public:\n"
" int *i;\n"
" Fred();\n"
" ~Fred();\n"
"};\n"
"\n"
"Fred::Fred()\n"
"{\n"
" this->i = new int;\n"
"}\n"
"Fred::~Fred()\n"
"{\n"
" delete this->i;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("class Fred\n"
"{\n"
"public:\n"
" int *i;\n"
" Fred()\n"
" {\n"
" this->i = new int;\n"
" }\n"
" ~Fred()\n"
" {\n"
" delete this->i;\n"
" }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void class8() {
check("class A\n"
"{\n"
"public:\n"
" void a();\n"
" void doNothing() { }\n"
"};\n"
"\n"
"void A::a()\n"
"{\n"
" int* c = new int(1);\n"
" delete c;\n"
" doNothing(c);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("class A\n"
"{\n"
"public:\n"
" void a()\n"
" {\n"
" int* c = new int(1);\n"
" delete c;\n"
" doNothing(c);\n"
" }\n"
" void doNothing() { }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void class9() {
check("class A\n"
"{\n"
"public:\n"
" int * p;\n"
" A();\n"
" ~A();\n"
"};\n"
"\n"
"A::A()\n"
"{ p = new int; }\n"
"\n"
"A::~A()\n"
"{ delete (p); }");
ASSERT_EQUALS("", errout.str());
check("class A\n"
"{\n"
"public:\n"
" int * p;\n"
" A()\n"
" { p = new int; }\n"
" ~A()\n"
" { delete (p); }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void class10() {
check("class A\n"
"{\n"
"public:\n"
" int * p;\n"
" A();\n"
"};\n"
"A::A()\n"
"{ p = new int; }");
ASSERT_EQUALS("[test.cpp:4]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
check("class A\n"
"{\n"
"public:\n"
" int * p;\n"
" A() { p = new int; }\n"
"};");
ASSERT_EQUALS("[test.cpp:4]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
}
void class11() {
check("class A\n"
"{\n"
"public:\n"
" int * p;\n"
" A() : p(new int[10])\n"
" { }"
"};");
ASSERT_EQUALS("[test.cpp:4]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
check("class A\n"
"{\n"
"public:\n"
" int * p;\n"
" A();\n"
"};\n"
"A::A() : p(new int[10])\n"
"{ }");
ASSERT_EQUALS("[test.cpp:4]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
}
void class12() {
check("class A\n"
"{\n"
"private:\n"
" int *p;\n"
"public:\n"
" A();\n"
" ~A();\n"
" void cleanup();"
"};\n"
"\n"
"A::A()\n"
"{ p = new int[10]; }\n"
"\n"
"A::~A()\n"
"{ }\n"
"\n"
"void A::cleanup()\n"
"{ delete [] p; }");
ASSERT_EQUALS("[test.cpp:4]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
check("class A\n"
"{\n"
"private:\n"
" int *p;\n"
"public:\n"
" A()\n"
" { p = new int[10]; }\n"
" ~A()\n"
" { }\n"
" void cleanup()\n"
" { delete [] p; }\n"
"};");
ASSERT_EQUALS("[test.cpp:4]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
}
void class13() {
check("class A\n"
"{\n"
"private:\n"
" int *p;\n"
"public:\n"
" A();\n"
" ~A();\n"
" void foo();"
"};\n"
"\n"
"A::A()\n"
"{ }\n"
"\n"
"A::~A()\n"
"{ }\n"
"\n"
"void A::foo()\n"
"{ p = new int[10]; delete [] p; }");
ASSERT_EQUALS("[test.cpp:17]: (warning) Possible leak in public function. The pointer 'p' is not deallocated before it is allocated.\n", errout.str());
check("class A\n"
"{\n"
"private:\n"
" int *p;\n"
"public:\n"
" A()\n"
" { }\n"
" ~A()\n"
" { }\n"
" void foo()\n"
" { p = new int[10]; delete [] p; }\n"
"};");
ASSERT_EQUALS("[test.cpp:11]: (warning) Possible leak in public function. The pointer 'p' is not deallocated before it is allocated.\n", errout.str());
}
void class14() {
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" void init();\n"
"};\n"
"\n"
"void A::init()\n"
"{ p = new int[10]; }");
ASSERT_EQUALS("[test.cpp:9]: (warning) Possible leak in public function. The pointer 'p' is not deallocated before it is allocated.\n"
"[test.cpp:3]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" void init()\n"
" { p = new int[10]; }\n"
"};");
ASSERT_EQUALS("[test.cpp:6]: (warning) Possible leak in public function. The pointer 'p' is not deallocated before it is allocated.\n"
"[test.cpp:3]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" void init();\n"
"};\n"
"\n"
"void A::init()\n"
"{ p = new int; }");
ASSERT_EQUALS("[test.cpp:9]: (warning) Possible leak in public function. The pointer 'p' is not deallocated before it is allocated.\n"
"[test.cpp:3]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" void init()\n"
" { p = new int; }\n"
"};");
ASSERT_EQUALS("[test.cpp:6]: (warning) Possible leak in public function. The pointer 'p' is not deallocated before it is allocated.\n"
"[test.cpp:3]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" void init();\n"
"};\n"
"\n"
"void A::init()\n"
"{ p = malloc(sizeof(int)*10); }");
ASSERT_EQUALS("[test.cpp:9]: (warning) Possible leak in public function. The pointer 'p' is not deallocated before it is allocated.\n"
"[test.cpp:3]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" void init()\n"
" { p = malloc(sizeof(int)*10); }\n"
"};");
ASSERT_EQUALS("[test.cpp:6]: (warning) Possible leak in public function. The pointer 'p' is not deallocated before it is allocated.\n"
"[test.cpp:3]: (style) Class 'A' is unsafe, 'A::p' can leak by wrong usage.\n", errout.str());
}
void class15() {
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" A();\n"
" ~A() { delete [] p; }\n"
"};\n"
"A::A()\n"
"{ p = new int[10]; }");
ASSERT_EQUALS("", errout.str());
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" A()\n"
" { p = new int[10]; }\n"
" ~A() { delete [] p; }\n"
"};");
ASSERT_EQUALS("", errout.str());
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" A();\n"
" ~A() { delete p; }\n"
"};\n"
"A::A()\n"
"{ p = new int; }");
ASSERT_EQUALS("", errout.str());
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" A()\n"
" { p = new int; }\n"
" ~A() { delete p; }\n"
"};");
ASSERT_EQUALS("", errout.str());
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" A();\n"
" ~A() { free(p); }\n"
"};\n"
"A::A()\n"
"{ p = malloc(sizeof(int)*10); }");
ASSERT_EQUALS("", errout.str());
check("class A\n"
"{\n"
" int *p;\n"
"public:\n"
" A()\n"
" { p = malloc(sizeof(int)*10); }\n"
" ~A() { free(p); }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void class16() {
// Ticket #1510
check("class A\n"
"{\n"
" int *a;\n"
" int *b;\n"
"public:\n"
" A() { a = b = new int[10]; }\n"
" ~A() { delete [] a; }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void class17() {
// Ticket #1557
check("class A {\n"
"private:\n"
" char *pd;\n"
"public:\n"
" void foo();\n"
"};\n"
"\n"
"void A::foo()\n"
"{\n"
" A::pd = new char[12];\n"
" delete [] A::pd;\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (warning) Possible leak in public function. The pointer 'pd' is not deallocated before it is allocated.\n", errout.str());
check("class A {\n"
"private:\n"
" char *pd;\n"
"public:\n"
" void foo()\n"
" {\n"
" pd = new char[12];\n"
" delete [] pd;\n"
" }\n"
"};");
ASSERT_EQUALS("[test.cpp:7]: (warning) Possible leak in public function. The pointer 'pd' is not deallocated before it is allocated.\n", errout.str());
check("class A {\n"
"private:\n"
" char *pd;\n"
"public:\n"
" void foo();\n"
"};\n"
"\n"
"void A::foo()\n"
"{\n"
" pd = new char[12];\n"
" delete [] pd;\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (warning) Possible leak in public function. The pointer 'pd' is not deallocated before it is allocated.\n", errout.str());
}
void class18() {
// Ticket #853
check("class A : public x\n"
"{\n"
"public:\n"
" A()\n"
" {\n"
" a = new char[10];\n"
" foo(a);\n"
" }\n"
"private:\n"
" char *a;\n"
"};");
ASSERT_EQUALS("", errout.str());
check("class A : public x\n"
"{\n"
"public:\n"
" A();\n"
"private:\n"
" char *a;\n"
"};\n"
"A::A()\n"
"{\n"
" a = new char[10];\n"
" foo(a);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void class19() {
// Ticket #2219
check("class Foo\n"
"{\n"
"private:\n"
" TRadioButton* rp1;\n"
" TRadioButton* rp2;\n"
"public:\n"
" Foo();\n"
"};\n"
"Foo::Foo()\n"
"{\n"
" rp1 = new TRadioButton(this);\n"
" rp2 = new TRadioButton(this);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("class TRadioButton { };\n"
"class Foo\n"
"{\n"
"private:\n"
" TRadioButton* rp1;\n"
" TRadioButton* rp2;\n"
"public:\n"
" Foo();\n"
"};\n"
"Foo::Foo()\n"
"{\n"
" rp1 = new TRadioButton;\n"
" rp2 = new TRadioButton;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (style) Class 'Foo' is unsafe, 'Foo::rp1' can leak by wrong usage.\n"
"[test.cpp:6]: (style) Class 'Foo' is unsafe, 'Foo::rp2' can leak by wrong usage.\n", errout.str());
check("class TRadioButton { };\n"
"class Foo\n"
"{\n"
"private:\n"
" TRadioButton* rp1;\n"
" TRadioButton* rp2;\n"
"public:\n"
" Foo();\n"
" ~Foo();\n"
"};\n"
"Foo::Foo()\n"
"{\n"
" rp1 = new TRadioButton;\n"
" rp2 = new TRadioButton;\n"
"}\n"
"Foo::~Foo()\n"
"{\n"
" delete rp1;\n"
" delete rp2;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void class20() {
check("namespace ns1 {\n"
" class Fred\n"
" {\n"
" private:\n"
" char *str1;\n"
" char *str2;\n"
" public:\n"
" Fred()\n"
" {\n"
" str1 = new char[10];\n"
" str2 = new char[10];\n"
" }\n"
" ~Fred()\n"
" {\n"
" delete [] str2;\n"
" }\n"
" };\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (style) Class 'Fred' is unsafe, 'Fred::str1' can leak by wrong usage.\n", errout.str());
check("namespace ns1 {\n"
" class Fred\n"
" {\n"
" private:\n"
" char *str1;\n"
" char *str2;\n"
" public:\n"
" Fred();\n"
" ~Fred();\n"
" };\n"
"\n"
" Fred::Fred()\n"
" {\n"
" str1 = new char[10];\n"
" str2 = new char[10];\n"
" }\n"
"\n"
" Fred::~Fred()\n"
" {\n"
" delete [] str2;\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (style) Class 'Fred' is unsafe, 'Fred::str1' can leak by wrong usage.\n", errout.str());
check("namespace ns1 {\n"
" class Fred\n"
" {\n"
" private:\n"
" char *str1;\n"
" char *str2;\n"
" public:\n"
" Fred();\n"
" ~Fred();\n"
" };\n"
"}\n"
"ns1::Fred::Fred()\n"
"{\n"
" str1 = new char[10];\n"
" str2 = new char[10];\n"
"}\n"
"\n"
"ns1::Fred::~Fred()\n"
"{\n"
" delete [] str2;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (style) Class 'Fred' is unsafe, 'Fred::str1' can leak by wrong usage.\n", errout.str());
check("namespace ns1 {\n"
" namespace ns2 {\n"
" class Fred\n"
" {\n"
" private:\n"
" char *str1;\n"
" char *str2;\n"
" public:\n"
" Fred();\n"
" ~Fred();\n"
" };\n"
" }\n"
"}\n"
"ns1::ns2::Fred::Fred()\n"
"{\n"
" str1 = new char[10];\n"
" str2 = new char[10];\n"
"}\n"
"\n"
"ns1::ns2::Fred::~Fred()\n"
"{\n"
" delete [] str2;\n"
"}");
ASSERT_EQUALS("[test.cpp:6]: (style) Class 'Fred' is unsafe, 'Fred::str1' can leak by wrong usage.\n", errout.str());
check("namespace ns1 {\n"
" namespace ns2 {\n"
" namespace ns3 {\n"
" class Fred\n"
" {\n"
" private:\n"
" char *str1;\n"
" char *str2;\n"
" public:\n"
" Fred();\n"
" ~Fred();\n"
" };\n"
" }\n"
" }\n"
"}\n"
"ns1::ns2::ns3::Fred::Fred()\n"
"{\n"
" str1 = new char[10];\n"
" str2 = new char[10];\n"
"}\n"
"\n"
"ns1::ns2::ns3::Fred::~Fred()\n"
"{\n"
" delete [] str2;\n"
"}");
ASSERT_EQUALS("[test.cpp:7]: (style) Class 'Fred' is unsafe, 'Fred::str1' can leak by wrong usage.\n", errout.str());
}
void class21() { // ticket #2517
check("struct B { };\n"
"struct C\n"
"{\n"
" B * b;\n"
" C(B * x) : b(x) { }\n"
"};\n"
"class A\n"
"{\n"
" B *b;\n"
" C *c;\n"
"public:\n"
" A() : b(new B()), c(new C(b)) { }\n"
"}");
ASSERT_EQUALS("[test.cpp:9]: (style) Class 'A' is unsafe, 'A::b' can leak by wrong usage.\n"
"[test.cpp:10]: (style) Class 'A' is unsafe, 'A::c' can leak by wrong usage.\n", errout.str());
check("struct B { };\n"
"struct C\n"
"{\n"
" B * b;\n"
" C(B * x) : b(x) { }\n"
"};\n"
"class A\n"
"{\n"
" B *b;\n"
" C *c;\n"
"public:\n"
" A()\n"
" {\n"
" b = new B();\n"
" c = new C(b);\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:9]: (style) Class 'A' is unsafe, 'A::b' can leak by wrong usage.\n"
"[test.cpp:10]: (style) Class 'A' is unsafe, 'A::c' can leak by wrong usage.\n", errout.str());
}
void class22() { // ticket #3012 - false positive
check("class Fred {\n"
"private:\n"
" int * a;\n"
"private:\n"
" Fred() { a = new int; }\n"
" ~Fred() { (delete(a), (a)=NULL); }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void class23() { // ticket #3303 - false positive
check("class CDataImpl {\n"
"public:\n"
" CDataImpl() { m_refcount = 1; }\n"
" void Release() { if (--m_refcount == 0) delete this; }\n"
"private:\n"
" int m_refcount;\n"
"};\n"
"\n"
"class CData {\n"
"public:\n"
" CData() : m_impl(new CDataImpl()) { }\n"
" ~CData() { if (m_impl) m_impl->Release(); }\n"
"private:\n"
" CDataImpl *m_impl;\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void class24() { // ticket #3806 - false positive in copy constructor
check("class Fred {\n"
"private:\n"
" int * a;\n"
"public:\n"
" Fred(const Fred &fred) { a = new int; }\n"
" ~Fred() { delete a; }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void class25() { // ticket #4367 - false positive when implementation for destructor is not seen
check("class Fred {\n"
"private:\n"
" int * a;\n"
"public:\n"
" Fred() { a = new int; }\n"
" ~Fred();\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void staticvar() {
check("class A\n"
"{\n"
"private:\n"
" static int * p;\n"
"public:"
" A()\n"
" {\n"
" if (!p)\n"
" p = new int[100];\n"
" }\n"
"};");
ASSERT_EQUALS("", errout.str());
}
void free_member_in_sub_func() {
// Member function
check("class Tokenizer\n"
"{\n"
"public:\n"
" Tokenizer();\n"
" ~Tokenizer();\n"
"\n"
"private:\n"
" int *_tokens;\n"
" static void deleteTokens(int *tok);\n"
"};\n"
"\n"
"Tokenizer::Tokenizer()\n"
"{\n"
" _tokens = new int;\n"
"}\n"
"\n"
"Tokenizer::~Tokenizer()\n"
"{\n"
" deleteTokens(_tokens);\n"
" _tokens = 0;\n"
"}\n"
"\n"
"void Tokenizer::deleteTokens(int *tok)\n"
"{\n"
" delete tok;\n"
"}");
ASSERT_EQUALS("", errout.str());
// Global function
check("void deleteTokens(int *tok)\n"
"{\n"
" delete tok;\n"
"}\n"
"class Tokenizer\n"
"{\n"
"public:\n"
" Tokenizer();\n"
" ~Tokenizer();\n"
"\n"
"private:\n"
" int *_tokens;\n"
"};\n"
"\n"
"Tokenizer::Tokenizer()\n"
"{\n"
" _tokens = new int;\n"
"}\n"
"\n"
"Tokenizer::~Tokenizer()\n"
"{\n"
" deleteTokens(_tokens);\n"
" _tokens = 0;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void mismatch1() {
check("class A\n"
"{\n"
"public:\n"
" A(int i);\n"
" ~A();\n"
"private:\n"
" char* pkt_buffer;\n"
"};\n"
"\n"
"A::A(int i)\n"
"{\n"
" pkt_buffer = new char[8192];\n"
" if (i != 1) {\n"
" delete pkt_buffer;\n"
" pkt_buffer = 0;\n"
" }\n"
"}\n"
"\n"
"A::~A() {\n"
" delete [] pkt_buffer;\n"
"}");
ASSERT_EQUALS("[test.cpp:14]: (error) Mismatching allocation and deallocation: A::pkt_buffer\n", errout.str());
}
void mismatch2() { // #5659
check("namespace NS\n"
"{\n"
"class Foo\n"
"{\n"
"public:\n"
" void fct();\n"
"\n"
"private:\n"
" char* data_;\n"
"};\n"
"}\n"
"\n"
"using namespace NS;\n"
"\n"
"void Foo::fct()\n"
"{\n"
" data_ = new char[42];\n"
" delete data_;\n"
" data_ = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:17]: (warning) Possible leak in public function. The pointer 'data_' is not deallocated before it is allocated.\n"
"[test.cpp:18]: (error) Mismatching allocation and deallocation: Foo::data_\n", errout.str());
check("namespace NS\n"
"{\n"
"class Foo\n"
"{\n"
"public:\n"
" void fct(int i);\n"
"\n"
"private:\n"
" char* data_;\n"
"};\n"
"}\n"
"\n"
"using namespace NS;\n"
"\n"
"void Foo::fct(int i)\n"
"{\n"
" data_ = new char[42];\n"
" delete data_;\n"
" data_ = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:17]: (warning) Possible leak in public function. The pointer 'data_' is not deallocated before it is allocated.\n"
"[test.cpp:18]: (error) Mismatching allocation and deallocation: Foo::data_\n", errout.str());
}
void func1() {
check("class Fred\n"
"{\n"
"private:\n"
" char *s;\n"
"public:\n"
" Fred() { s = 0; }\n"
" ~Fred() { free(s); }\n"
" void xy()\n"
" { s = malloc(100); }\n"
"};");
ASSERT_EQUALS("[test.cpp:9]: (warning) Possible leak in public function. The pointer 's' is not deallocated before it is allocated.\n", errout.str());
check("class Fred\n"
"{\n"
"public:\n"
" Fred() { s = 0; }\n"
" ~Fred() { free(s); }\n"
" void xy()\n"
" { s = malloc(100); }\n"
"private:\n"
" char *s;\n"
"};");
ASSERT_EQUALS("[test.cpp:7]: (warning) Possible leak in public function. The pointer 's' is not deallocated before it is allocated.\n", errout.str());
}
void func2() {
check("class Fred\n"
"{\n"
"private:\n"
" char *s;\n"
"public:\n"
" Fred() { s = 0; }\n"
" ~Fred() { free(s); }\n"
" const Fred & operator = (const Fred &f)\n"
" { s = malloc(100); }\n"
"};");
ASSERT_EQUALS("[test.cpp:9]: (warning) Possible leak in public function. The pointer 's' is not deallocated before it is allocated.\n", errout.str());
}
};
REGISTER_TEST(TestMemleakInClass)
class TestMemleakStructMember : public TestFixture {
public:
TestMemleakStructMember() : TestFixture("TestMemleakStructMember") {
}
private:
Settings settings;
void check(const char code[], bool isCPP = true) {
// Clear the error buffer..
errout.str("");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, isCPP ? "test.cpp" : "test.c");
tokenizer.simplifyTokenList2();
// Check for memory leaks..
CheckMemoryLeakStructMember checkMemoryLeakStructMember(&tokenizer, &settings, this);
checkMemoryLeakStructMember.check();
}
void run() {
LOAD_LIB_2(settings.library, "std.cfg");
LOAD_LIB_2(settings.library, "posix.cfg");
// testing that errors are detected
TEST_CASE(err);
// handle / bail out when "goto" is found
TEST_CASE(goto_);
// Don't report errors if the struct is returned
TEST_CASE(ret1);
TEST_CASE(ret2);
// assignments
TEST_CASE(assign1);
TEST_CASE(assign2);
TEST_CASE(assign3);
// Failed allocation
TEST_CASE(failedAllocation);
TEST_CASE(function1); // Deallocating in function
TEST_CASE(function2); // #2848: Taking address in function
TEST_CASE(function3); // #3024: kernel list
TEST_CASE(function4); // #3038: Deallocating in function
// Handle if-else
TEST_CASE(ifelse);
// Linked list
TEST_CASE(linkedlist);
// struct variable is a global variable
TEST_CASE(globalvar);
// local struct variable
TEST_CASE(localvars);
// Segmentation fault in CheckMemoryLeakStructMember
TEST_CASE(trac5030);
TEST_CASE(varid); // #5201: Analysis confused by (variable).attribute notation
TEST_CASE(varid_2); // #5315: Analysis confused by ((variable).attribute) notation
TEST_CASE(customAllocation);
}
void err() {
check("static void foo()\n"
"{\n"
" struct ABC *abc = malloc(sizeof(struct ABC));\n"
" abc->a = malloc(10);\n"
" free(abc);\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: abc.a\n", errout.str());
check("static void foo()\n"
"{\n"
" struct ABC *abc = malloc(sizeof(struct ABC));\n"
" abc->a = malloc(10);\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Memory leak: abc.a\n", errout.str());
check("static ABC * foo()\n"
"{\n"
" ABC *abc = malloc(sizeof(ABC));\n"
" abc->a = malloc(10);\n"
" abc->b = malloc(10);\n"
" if (abc->b == 0)\n"
" {\n"
" return 0;\n"
" }\n"
" return abc;\n"
"}");
ASSERT_EQUALS("[test.cpp:8]: (error) Memory leak: abc.a\n", errout.str());
check("static void foo(int a)\n"
"{\n"
" ABC *abc = malloc(sizeof(ABC));\n"
" abc->a = malloc(10);\n"
" if (a == 1)\n"
" {\n"
" free(abc->a);\n"
" return;\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:10]: (error) Memory leak: abc.a\n", errout.str());
}
void goto_() {
check("static void foo()\n"
"{\n"
" struct ABC *abc = malloc(sizeof(struct ABC));\n"
" abc->a = malloc(10);\n"
" if (abc->a)\n"
" { goto out; }\n"
" free(abc);\n"
" return;\n"
"out:\n"
" free(abc->a);\n"
" free(abc);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void ret1() {
check("static ABC * foo()\n"
"{\n"
" struct ABC *abc = malloc(sizeof(struct ABC));\n"
" abc->a = malloc(10);\n"
" return abc;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("static void foo(struct ABC *abc)\n"
"{\n"
" abc->a = malloc(10);\n"
"}");
ASSERT_EQUALS("", errout.str());
// #7302
check("void* foo() {\n"
" struct ABC abc;\n"
" abc.a = malloc(10);\n"
" return abc.a;\n"
"}", false);
ASSERT_EQUALS("", errout.str());
check("void* foo() {\n"
" struct ABC abc;\n"
" abc.a = malloc(10);\n"
" return abc.b;\n"
"}", false);
ASSERT_EQUALS("[test.c:4]: (error) Memory leak: abc.a\n", errout.str());
}
void ret2() {
check("static ABC * foo()\n"
"{\n"
" struct ABC *abc = malloc(sizeof(struct ABC));\n"
" abc->a = malloc(10);\n"
" return &abc->self;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void assign1() {
check("static void foo()\n"
"{\n"
" struct ABC *abc = abc1;\n"
" abc->a = malloc(10);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("static void foo()\n"
"{\n"
" struct ABC *abc;\n"
" abc1 = abc = malloc(sizeof(ABC));\n"
" abc->a = malloc(10);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("static void foo()\n"
"{\n"
" struct msn_entry *ptr;\n"
" ptr = malloc(sizeof(struct msn_entry));\n"
" ptr->msn = malloc(100);\n"
" back = ptr;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void assign2() {
check("static void foo() {\n"
" struct ABC *abc = malloc(123);\n"
" abc->a = abc->b = malloc(10);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void assign3() {
check("void f(struct s *f1) {\n"
" struct s f2;\n"
" f2.a = malloc(100);\n"
" *f1 = f2;\n"
"}", false);
ASSERT_EQUALS("", errout.str());
}
void failedAllocation() {
check("static struct ABC * foo()\n"
"{\n"
" struct ABC *abc = malloc(sizeof(struct ABC));\n"
" abc->a = malloc(10);\n"
" if (!abc->a)\n"
" {\n"
" free(abc);\n"
" return 0;\n"
" }\n"
" return abc;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void function1() {
// Not found function => assume that the function may deallocate
check("static void foo()\n"
"{\n"
" struct ABC *abc = malloc(sizeof(struct ABC));\n"
" abc->a = malloc(10);\n"
" func(abc);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("static void foo()\n"
"{\n"
" struct ABC *abc = malloc(sizeof(struct ABC));\n"
" abclist.push_back(abc);\n"
" abc->a = malloc(10);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
// #2848: Taking address in function 'assign'
void function2() {
check("void f() {\n"
" A a = { 0 };\n"
" a.foo = (char *) malloc(10);\n"
" assign(&a);\n"
"}", false);
ASSERT_EQUALS("", errout.str());
}
// #3024: kernel list
void function3() {
check("void f() {\n"
" struct ABC *abc = malloc(100);\n"
" abc.a = (char *) malloc(10);\n"
" list_add_tail(&abc->list, head);\n"
"}", false);
ASSERT_EQUALS("", errout.str());
}
// #3038: deallocating in function
void function4() {
check("void a(char *p) { char *x = p; free(x); }\n"
"void b() {\n"
" struct ABC abc;\n"
" abc.a = (char *) malloc(10);\n"
" a(abc.a);\n"
"}", false);
ASSERT_EQUALS("", errout.str());
}
void ifelse() {
check("static void foo()\n"
"{\n"
" struct ABC *abc = malloc(sizeof(struct ABC));\n"
" if (x)"
" {\n"
" abc->a = malloc(10);\n"
" }\n"
" else\n"
" {\n"
" free(abc);\n"
" return;\n"
" }\n"
" free(abc->a);\n"
" free(abc);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void linkedlist() {
// #3904 - false positive when linked list is used
check("static void foo() {\n"
" struct ABC *abc = malloc(sizeof(struct ABC));\n"
" abc->next = malloc(sizeof(struct ABC));\n"
" abc->next->next = NULL;\n"
"\n"
" while (abc) {\n"
" struct ABC *next = abc->next;\n"
" free(abc);\n"
" abc = next;\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void globalvar() {
check("struct ABC *abc;\n"
"\n"
"static void foo()\n"
"{\n"
" abc = malloc(sizeof(struct ABC));\n"
" abc->a = malloc(10);\n"
" return;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
// Ticket #933 Leaks with struct members not detected
void localvars() {
// Test error case
const char code1[] = "struct A {\n"
" FILE* f;\n"
" char* c;\n"
" void* m;\n"
"};\n"
"\n"
"void func() {\n"
" struct A a;\n"
" a.f = fopen(\"test\", \"r\");\n"
" a.c = new char[12];\n"
" a.m = malloc(12);\n"
"}";
check(code1, true);
ASSERT_EQUALS("[test.cpp:12]: (error) Memory leak: a.f\n"
"[test.cpp:12]: (error) Memory leak: a.c\n"
"[test.cpp:12]: (error) Memory leak: a.m\n", errout.str());
check(code1, false);
ASSERT_EQUALS("[test.c:12]: (error) Memory leak: a.f\n"
"[test.c:12]: (error) Memory leak: a.m\n", errout.str());
// Test OK case
const char code2[] = "struct A {\n"
" FILE* f;\n"
" char* c;\n"
" void* m;\n"
"};\n"
"\n"
"void func() {\n"
" struct A a;\n"
" a.f = fopen(\"test\", \"r\");\n"
" a.c = new char[12];\n"
" a.m = malloc(12);\n"
" fclose(a.f);\n"
" delete [] a.c;\n"
" free(a.m);\n"
"}";
check(code2, true);
ASSERT_EQUALS("", errout.str());
check(code2, false);
ASSERT_EQUALS("", errout.str());
// Test unknown struct. In C++, it might have a destructor
const char code3[] = "void func() {\n"
" struct A a;\n"
" a.f = fopen(\"test\", \"r\");\n"
"}";
check(code3, true);
ASSERT_EQUALS("", errout.str());
check(code3, false);
ASSERT_EQUALS("[test.c:4]: (error) Memory leak: a.f\n", errout.str());
// Test struct with destructor
const char code4[] = "struct A {\n"
" FILE* f;\n"
" ~A();\n"
"};\n"
"void func() {\n"
" struct A a;\n"
" a.f = fopen(\"test\", \"r\");\n"
"}";
check(code4, true);
ASSERT_EQUALS("", errout.str());
}
// don't crash
void trac5030() {
check("bool bob( char const **column_ptrs ) {\n"
"unique_ptr<char[]>otherbuffer{new char[otherbufsize+1]};\n"
"char *const oldbuffer = otherbuffer.get();\n"
"int const oldbufsize = otherbufsize;\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void varid() { // #5201
check("struct S {\n"
" void *state_check_buff;\n"
"};\n"
"void f() {\n"
" S s;\n"
" (s).state_check_buff = (void* )malloc(1);\n"
" if (s.state_check_buff == 0)\n"
" return;\n"
"}", false);
ASSERT_EQUALS("[test.c:9]: (error) Memory leak: s.state_check_buff\n", errout.str());
}
void varid_2() { // #5315
check("typedef struct foo { char *realm; } foo;\n"
"void build_principal() {\n"
" foo f;\n"
" ((f)->realm) = strdup(realm);\n"
" if(f->realm == NULL) {}\n"
"}", false);
ASSERT_EQUALS("[test.c:6]: (error) Memory leak: f.realm\n", errout.str());
}
void customAllocation() { // #4770
check("char *myalloc(void) {\n"
" return malloc(100);\n"
"}\n"
"void func() {\n"
" struct ABC abc;\n"
" abc.a = myalloc();\n"
"}", false);
ASSERT_EQUALS("[test.c:7]: (error) Memory leak: abc.a\n", errout.str());
}
};
REGISTER_TEST(TestMemleakStructMember)
class TestMemleakNoVar : public TestFixture {
public:
TestMemleakNoVar() : TestFixture("TestMemleakNoVar") {
}
private:
Settings settings;
void check(const char code[]) {
// Clear the error buffer..
errout.str("");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
// Check for memory leaks..
CheckMemoryLeakNoVar checkMemoryLeakNoVar(&tokenizer, &settings, this);
checkMemoryLeakNoVar.check();
}
void run() {
settings.inconclusive = true;
settings.standards.posix = true;
settings.addEnabled("warning");
LOAD_LIB_2(settings.library, "std.cfg");
LOAD_LIB_2(settings.library, "posix.cfg");
// pass allocated memory to function..
TEST_CASE(functionParameter);
// never use leakable resource
TEST_CASE(missingAssignment);
// pass allocated memory to function using a smart pointer
TEST_CASE(smartPointerFunctionParam);
}
void functionParameter() {
// standard function..
check("void x() {\n"
" strcpy(a, strdup(p));\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (error) Allocation with strdup, strcpy doesn't release it.\n", errout.str());
check("char *x() {\n"
" char *ret = strcpy(malloc(10), \"abc\");\n"
" return ret;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void x() {\n"
" free(malloc(10));\n"
"}");
ASSERT_EQUALS("", errout.str());
// user function..
check("void set_error(const char *msg) {\n"
"}\n"
"\n"
"void x() {\n"
" set_error(strdup(p));\n"
"}");
TODO_ASSERT_EQUALS("[test.cpp:5]: (error) Allocation with strdup, set_error doesn't release it.\n", "", errout.str());
check("void f()\n"
"{\n"
" int fd;\n"
" fd = mkstemp(strdup(\"/tmp/file.XXXXXXXX\"));\n"
" close(fd);\n"
"}");
TODO_ASSERT_EQUALS("[test.cpp:4]: (error) Allocation with strdup, mkstemp doesn't release it.\n", "", errout.str());
check("void f()\n"
"{\n"
" if(TRUE || strcmp(strdup(a), b));\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Allocation with strdup, strcmp doesn't release it.\n", errout.str());
check("void f()\n"
"{\n"
" if(!strcmp(strdup(a), b) == 0);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Allocation with strdup, strcmp doesn't release it.\n", errout.str());
check("void f()\n"
"{\n"
" 42, strcmp(strdup(a), b);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Allocation with strdup, strcmp doesn't release it.\n", errout.str());
}
void missingAssignment() {
check("void x()\n"
"{\n"
" malloc(10);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Return value of allocation function 'malloc' is not stored.\n", errout.str());
check("void x()\n"
"{\n"
" calloc(10, 1);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Return value of allocation function 'calloc' is not stored.\n", errout.str());
check("void x()\n"
"{\n"
" strdup(\"Test\");\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Return value of allocation function 'strdup' is not stored.\n", errout.str());
check("void x()\n"
"{\n"
" (char*) malloc(10);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Return value of allocation function 'malloc' is not stored.\n", errout.str());
check("void x()\n"
"{\n"
" char* ptr = malloc(10);\n"
" foo(ptr);\n"
" free(ptr);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("char** x(const char* str) {\n"
" char* ptr[] = { malloc(10), malloc(5), strdup(str) };\n"
" return ptr;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void x()\n"
"{\n"
" 42,malloc(42);\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Return value of allocation function 'malloc' is not stored.\n", errout.str());
check("void *f()\n"
"{\n"
" return malloc(10);\n"
"}\n"
"void x()\n"
"{\n"
" f();\n"
"}");
ASSERT_EQUALS("[test.cpp:7]: (error) Return value of allocation function 'f' is not stored.\n", errout.str());
check("void x()\n"
"{\n"
" if(!malloc(5)) fail();\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Return value of allocation function 'malloc' is not stored.\n", errout.str());
check("FOO* factory() {\n"
" FOO* foo = new (std::nothrow) FOO;\n"
" return foo;\n"
"}");
ASSERT_EQUALS("", errout.str());
// Ticket #6536
check("struct S { S(int) {} };\n"
"void foo(int i) {\n"
" S socket(i);\n"
"}");
ASSERT_EQUALS("", errout.str());
// Ticket #6693
check("struct CTest {\n"
" void Initialise();\n"
" void malloc();\n"
"};\n"
"void CTest::Initialise() {\n"
" malloc();\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void foo() {\n" // #7348 - cast
" p = (::X*)malloc(42);\n"
"}");
ASSERT_EQUALS("", errout.str());
// #7182 "crash: CheckMemoryLeak::functionReturnType()"
check("template<typename... Ts> auto unary_right_comma (Ts... ts) { return (ts , ...); }\n"
"template<typename T, typename... Ts> auto binary_left_comma (T x, Ts... ts) { return (x , ... , ts); }\n"
"int main() {\n"
" unary_right_comma (a);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void smartPointerFunctionParam() {
check("void x() {\n"
" f(shared_ptr<int>(new int(42)), g());\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Unsafe allocation. If g() throws, memory could be leaked. Use make_shared<int>() instead.\n", errout.str());
check("void x() {\n"
" h(12, f(shared_ptr<int>(new int(42)), g()));\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Unsafe allocation. If g() throws, memory could be leaked. Use make_shared<int>() instead.\n", errout.str());
check("void x() {\n"
" f(unique_ptr<int>(new int(42)), g());\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Unsafe allocation. If g() throws, memory could be leaked. Use make_unique<int>() instead.\n", errout.str());
check("void x() {\n"
" f(g(), shared_ptr<int>(new int(42)));\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Unsafe allocation. If g() throws, memory could be leaked. Use make_shared<int>() instead.\n", errout.str());
check("void x() {\n"
" f(g(), unique_ptr<int>(new int(42)));\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Unsafe allocation. If g() throws, memory could be leaked. Use make_unique<int>() instead.\n", errout.str());
check("void x() {\n"
" f(shared_ptr<char>(new char), make_unique<int>(32));\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Unsafe allocation. If make_unique<int>() throws, memory could be leaked. Use make_shared<char>() instead.\n", errout.str());
check("void x() {\n"
" f(g(124), h(\"test\", 234), shared_ptr<char>(new char));\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Unsafe allocation. If h() throws, memory could be leaked. Use make_shared<char>() instead.\n", errout.str());
check("void x() {\n"
" f(shared_ptr<std::string>(new std::string(\"\")), g<std::string>());\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Unsafe allocation. If g<std::string>() throws, memory could be leaked. Use make_shared<std::string>() instead.\n", errout.str());
check("void g(int x) throw() { }\n"
"void x() {\n"
" f(g(124), shared_ptr<char>(new char));\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void __declspec(nothrow) g(int x) { }\n"
"void x() {\n"
" f(g(124), shared_ptr<char>(new char));\n"
"}");
ASSERT_EQUALS("", errout.str());
}
};
REGISTER_TEST(TestMemleakNoVar)
class TestMemleakGLib : public TestFixture {
public:
TestMemleakGLib() : TestFixture("TestMemleakGLib") {
}
private:
Settings settings;
void check(const char code[]) {
// Clear the error buffer..
errout.str("");
// Preprocess...
Preprocessor preprocessor(settings, this);
std::istringstream istrpreproc(code);
std::map<std::string, std::string> actual;
preprocessor.preprocess(istrpreproc, actual, "test.cpp");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(actual[""]);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList2();
// Check for memory leaks..
CheckMemoryLeakInFunction checkMemoryLeak1(&tokenizer, &settings, this);
CheckMemoryLeakInClass checkMemoryLeak2(&tokenizer, &settings, this);
CheckMemoryLeakStructMember checkMemoryLeak3(&tokenizer, &settings, this);
CheckMemoryLeakNoVar checkMemoryLeak4(&tokenizer, &settings, this);
checkMemoryLeak1.check();
checkMemoryLeak1.checkReallocUsage();
checkMemoryLeak2.check();
checkMemoryLeak3.check();
checkMemoryLeak4.check();
}
void run() {
LOAD_LIB_2(settings.library, "gtk.cfg");
settings.addEnabled("all");
TEST_CASE(glib1);
TEST_CASE(glib2); // #2806 - FP when using redundant assignment
}
void glib1() {
check("void f(gchar *_a, gchar *_b) {"
" g_return_if_fail(_a);"
" gchar *a = g_strdup(_a);"
" g_return_if_fail(_b);"
" gchar *b = g_strdup(_b);"
" g_free(a);"
" g_free(b);"
"}");
ASSERT_EQUALS("[test.cpp:1]: (error) Memory leak: a\n", errout.str());
check("void x() {\n"
" g_strlcpy(a, g_strdup(p));\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (error) Allocation with g_strdup, g_strlcpy doesn't release it.\n", errout.str());
check("void f()\n"
"{\n"
" if(TRUE || g_strcmp0(g_strdup(a), b));\n"
"}");
ASSERT_EQUALS("[test.cpp:3]: (error) Allocation with g_strdup, g_strcmp0 doesn't release it.\n", errout.str());
check("void foo()\n"
"{\n"
" int *p = g_malloc(3);\n"
" g_free(p);\n"
"}\n");
TODO_ASSERT_EQUALS("[test.cpp:3]: (error) The allocated size 3 is not a multiple of the underlying type's size.\n", "", errout.str());
check("class Fred\n"
"{\n"
"private:\n"
" char *str1;\n"
"public:\n"
" Fred()\n"
" {\n"
" str1 = new char[10];\n"
" }\n"
" ~Fred()\n"
" {\n"
" g_free(str1);\n"
" }\n"
"};");
ASSERT_EQUALS("[test.cpp:12]: (error) Mismatching allocation and deallocation: Fred::str1\n", errout.str());
check("class Fred\n"
"{\n"
"private:\n"
" gchar *s;\n"
"public:\n"
" Fred() { s = 0; }\n"
" ~Fred() { g_free(s); }\n"
" void xy()\n"
" { s = g_malloc(100); }\n"
"};");
ASSERT_EQUALS("[test.cpp:9]: (warning) Possible leak in public function. The pointer 's' is not deallocated before it is allocated.\n", errout.str());
}
void glib2() {
// #2806 - FP when there is redundant assignment
check("void foo() {\n"
" gchar *bar;\n"
" bar = g_strdup(fuba);\n"
" bar = g_strstrip(bar);\n"
" g_free(bar);\n"
"}");
ASSERT_EQUALS("", errout.str());
check("void* foo()\n"
"{\n"
" char *p1 = g_malloc(10);\n"
" char *p2 = g_strlcpy(p1, \"a\");\n"
" return p2;\n"
"}");
TODO_ASSERT_EQUALS("", "[test.cpp:5]: (error) Memory leak: p1\n", errout.str());
}
};
REGISTER_TEST(TestMemleakGLib)
class TestMemleakWindows : public TestFixture {
public:
TestMemleakWindows() : TestFixture("TestMemleakWindows") {
}
private:
Settings settings;
void check(const char code[]) {
// Clear the error buffer..
errout.str("");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.c");
tokenizer.simplifyTokenList2();
// Check for memory leaks..
CheckMemoryLeakInFunction checkMemoryLeak(&tokenizer, &settings, this);
checkMemoryLeak.checkReallocUsage();
checkMemoryLeak.check();
}
void run() {
LOAD_LIB_2(settings.library, "windows.cfg");
TEST_CASE(openfileNoLeak);
TEST_CASE(returnValueNotUsed_tfopen_s);
TEST_CASE(sendMessage);
}
void openfileNoLeak() {
check("void f() {"
" OFSTRUCT OfStr;"
" int hFile = OpenFile(\"file\", &OfStr, 0);"
"}");
ASSERT_EQUALS("[test.c:1]: (error) Resource leak: hFile\n", errout.str());
check("void f() {"
" OFSTRUCT OfStr;"
" int hFile = OpenFile(\"file\", &OfStr, OF_EXIST);"
"}");
TODO_ASSERT_EQUALS("", "[test.c:1]: (error) Resource leak: hFile\n", errout.str());
}
void returnValueNotUsed_tfopen_s() {
check("bool LoadFile(LPCTSTR filename) {\n"
" FILE *fp = NULL;\n"
" _tfopen_s(&fp, filename, _T(\"rb\"));\n"
" if (!fp)\n"
" return false;\n"
" fclose(fp);\n"
" return true;\n"
"}");
ASSERT_EQUALS("", errout.str());
check("bool LoadFile(LPCTSTR filename) {\n"
" FILE *fp = NULL;\n"
" _tfopen_s(&fp, filename, _T(\"rb\"));\n"
"}");
TODO_ASSERT_EQUALS("[test.c:3]: (error) Resource leak: fp\n", "", errout.str());
}
void sendMessage() {
check("void SetFont() {\n"
" HFONT hf = CreateFontIndirect(&lf);\n"
" SendMessage(hwnd, WM_SETFONT, (WPARAM)hf, TRUE);\n" // We do not know what the handler for the message will do with 'hf', so it might be closed later
"}");
ASSERT_EQUALS("", errout.str());
}
};
REGISTER_TEST(TestMemleakWindows)
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