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Ticket #7685: Properly handle function calls as argument to a dealloc function. (#853) 

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Simon Martin 2016-12-29 13:17:46 +01:00 committed by PKEuS
parent 21ab39e2b2
commit f43431408b
2 changed files with 14 additions and 1 deletions
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6
lib/checkleakautovar.cpp
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@ -546,7 +546,11 @@ void CheckLeakAutoVar::functionCall(const Token *tok, VarInfo *varInfo, const Va
if (!af || af->arg == argNr)
changeAllocStatus(varInfo, allocation, tok, arg);
} else if (Token::Match(arg, "%name% (")) {
functionCall(arg, varInfo, allocation, af);
const Library::AllocFunc* allocFunc = _settings->library.dealloc(arg);
VarInfo::AllocInfo alloc(allocFunc ? allocFunc->groupId : 0, VarInfo::DEALLOC);
if (alloc.type == 0)
alloc.status = VarInfo::NOALLOC;
functionCall(arg, varInfo, alloc, allocFunc);
}
argNr++;
}

9
test/testleakautovar.cpp
View File

@ -66,6 +66,7 @@ private:
TEST_CASE(doublefree3); // #4914
TEST_CASE(doublefree4); // #5451 - FP when exit is called
TEST_CASE(doublefree5); // #5522
TEST_CASE(doublefree6); // #7685
// exit
TEST_CASE(exit1);
@ -822,6 +823,14 @@ private:
ASSERT_EQUALS("[test.c:4]: (error) Memory pointed to by 'p' is freed twice.\n", errout.str());
}
void doublefree6() { // #7685
check("void do_wordexp(FILE *f) {\n"
" free(getword(f));\n"
" fclose(f);\n"
"}", /*cpp=*/false);
ASSERT_EQUALS("", errout.str());
}
void exit1() {
check("void f() {\n"
" char *p = malloc(10);\n"