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Fixed #5666 (False positive when modifiying std::string by pointer)

This commit is contained in:
Daniel Marjamäki 2016-12-26 17:13:35 +01:00
parent 7e7aa21029
commit 1b21767954
2 changed files with 13 additions and 1 deletions
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2
lib/tokenize.cpp
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@ -6249,7 +6249,7 @@ bool Tokenizer::simplifyKnownVariables()
(Token::Match(tok2, "%name% = %bool%|%char%|%num%|%str%|%name% ;") ||
Token::Match(tok2, "%name% [ %num%| ] = %str% ;") ||
Token::Match(tok2, "%name% = & %name% ;") ||
Token::Match(tok2, "%name% = & %name% [ 0 ] ;"))) {
(Token::Match(tok2, "%name% = & %name% [ 0 ] ;") && arrays.find(tok2->tokAt(3)->varId()) != arrays.end()))) {
const unsigned int varid = tok2->varId();
if (varid == 0)
continue;

12
test/testtokenize.cpp
View File

@ -179,6 +179,7 @@ private:
TEST_CASE(simplifyKnownVariables59); // skip for header
TEST_CASE(simplifyKnownVariables60); // #6829
TEST_CASE(simplifyKnownVariables61); // #7805
TEST_CASE(simplifyKnownVariables62); // #5666 - p=&str[0]
TEST_CASE(simplifyKnownVariablesBailOutAssign1);
TEST_CASE(simplifyKnownVariablesBailOutAssign2);
TEST_CASE(simplifyKnownVariablesBailOutAssign3); // #4395 - nested assignments
@ -2663,6 +2664,17 @@ private:
ASSERT_EQUALS("", errout.str());
}
void simplifyKnownVariables62() { // #5666
ASSERT_EQUALS("void foo ( std :: string str ) {\n"
"char * p ; p = & str [ 0 ] ;\n"
"* p = 0 ;\n"
"}",
tokenizeAndStringify("void foo(std::string str) {\n"
" char *p = &str[0];\n"
" *p = 0;\n"
"}", /*simplify=*/true));
}
void simplifyKnownVariablesBailOutAssign1() {
const char code[] = "int foo() {\n"
" int i; i = 0;\n"