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Fixed #1833 (memory leak detected in version 1.37 not detected in 1.43)

This commit is contained in:
Daniel Marjamäki 2010-08-02 23:04:23 +02:00
parent ff9d3d0965
commit 6700351ede
2 changed files with 25 additions and 1 deletions
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22
lib/checkmemoryleak.cpp
View File

@ -1306,6 +1306,20 @@ Token *CheckMemoryLeakInFunction::getcode(const Token *tok, std::list<const Toke
Token::Match(tok, "= strcpy|strcat|memmove|memcpy ( %varid% ,", varid) ||
Token::Match(tok, "[;{}] %var% [ %varid% ]", varid))
{
bool used = true;
if (Token::Match(tok->tokAt(-2), "; %var% = %varid%", varid))
{
const unsigned int varid2(tok->previous()->varId());
if (Token::Match(tok->tokAt(-6), "const %type% * %varid% ;", varid2) ||
Token::Match(tok->tokAt(-7), "const struct %type% * %varid% ;", varid2))
{
// address is taken by pointer constant
used = false;
}
}
if (used)
addtoken("use");
}
else if (Token::Match(tok->previous(), "[;{}=(,+-*/] %varid% [", varid))
@ -1823,6 +1837,14 @@ void CheckMemoryLeakInFunction::simplifycode(Token *tok)
done = false;
}
// Replace "loop callfunc ;" with ";"
if (Token::simpleMatch(tok2, "loop callfunc ;"))
{
tok2->deleteThis();
tok2->deleteThis();
done = false;
}
// Replace "loop if return ;" with "if return ;"
if (Token::simpleMatch(tok2->next(), "loop if return"))
{

2
test/testmemleak.cpp
View File

@ -518,6 +518,7 @@ private:
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(";;;;", getcode("char *p; const char *q; q = p;", "p"));
// return..
ASSERT_EQUALS(";;return;", getcode("char *s; return;", "s"));
@ -712,6 +713,7 @@ private:
ASSERT_EQUALS("; callfunc ;", simplifycode(";callfunc;"));
ASSERT_EQUALS(";", simplifycode(";callfunc;;"));
ASSERT_EQUALS("dealloc ; alloc ; return ; }", simplifycode("while1 { dealloc ; alloc ; } callfunc ; return ; }"));
ASSERT_EQUALS(";", simplifycode("loop callfunc ;"));
// exit..
ASSERT_EQUALS("; exit ;", simplifycode("; alloc; exit;"));