http://llvm.org/bugs/show_bug.cgi?id=16730
Bug ID: 16730
Summary: Static analyzer incorrectly reports leaks when realloc
fails
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Static Analyzer
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
$ cat leak.c
#include <stdlib.h>
void Realloc(void** memory) {
*memory = malloc(47);
char* new_memory = realloc(*memory, 47);
if (new_memory != NULL) {
*memory = new_memory;
}
}
$ ~/llvm/build/bin/clang --analyze leak.c
leak.c:9:1: warning: Potential memory leak
}
^
1 warning generated.
The problem with the above warning is that even if the realloc fails, the first
allocated block of memory will still be addressable by *memory (which will be
available to the caller). Therefore, this should not be reported as leaked.
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