https://llvm.org/bugs/show_bug.cgi?id=25993
Bug ID: 25993
Summary: scan-build: false positive w/memset return
Product: clang
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Static Analyzer
Assignee: kreme...@apple.com
Reporter: vap...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
scan-build does not seem to understand the relationship between the first arg
and the return value. from POSIX:
http://pubs.opengroup.org/onlinepubs/9699919799/functions/memset.html
void *memset(void *s, int c, size_t n);
RETURN VALUE
The memset() function shall return s;
so when you have code like:
#include <stdio.h>
#include <string.h>
int main(int argc, char *argv[])
{
char *s = memset(malloc(10), 0, 10);
strcpy(s, "abc");
puts(s);
return 0;
}
scan-build wrongly reports:
test.c:5:2: warning: Potential memory leak
char *s = memset(malloc(10), 0, 10);
^~~~~~~
1 warning generated.
scan-build: 1 bug found.
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