https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85259
Bug ID: 85259
Summary: [8 Regression] Missing -Wstringop-overflow= since
r256683
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
CC: law at gcc dot gnu.org, msebor at gcc dot gnu.org
Target Milestone: ---
Since the revision, for:
$ cat /tmp/xx11.c
#include <string.h>
char buf[6];
int main(int argc, char **argv) {
strcpy(buf,"hello ");
strcat(buf,"world!");
return 0;
}
$ gcc -O2 -Wall /tmp/xx11.c -D_FORTIFY_SOURCE=2
[no output]
Before the revision I see:
/usr/include/bits/string_fortified.h:128:10: warning: ‘__builtin___memcpy_chk’
writing 7 bytes into a region of size 6 overflows the destination
[-Wstringop-overflow=]
