[Bug middle-end/79538] missing -Wformat-overflow with %s and non-member array arguments
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79538 Qing Zhao changed: What|Removed |Added Status|ASSIGNED|RESOLVED Resolution|--- |FIXED --- Comment #5 from Qing Zhao --- this bug has been fixed in upstream. and is decided not back port to Gcc 7. so close it as resolved
[Bug middle-end/79538] missing -Wformat-overflow with %s and non-member array arguments
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79538 --- Comment #4 from Qing Zhao --- fixed in https://gcc.gnu.org/viewcvs/gcc?view=revision=255654
[Bug middle-end/79538] missing -Wformat-overflow with %s and non-member array arguments
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79538 Paolo Carlini changed: What|Removed |Added Status|NEW |ASSIGNED CC|qing.zhao at oracle dot com| Assignee|unassigned at gcc dot gnu.org |qing.zhao at oracle dot com --- Comment #3 from Paolo Carlini --- Qing is on it.
[Bug middle-end/79538] missing -Wformat-overflow with %s and non-member array arguments
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79538 Qing Zhao changed: What|Removed |Added CC||qing.zhao at oracle dot com --- Comment #2 from Qing Zhao --- this is because the routine "get_range_strlen" misses the handling of regular arrays. adding the support should fix this issue.
[Bug middle-end/79538] missing -Wformat-overflow with %s and non-member array arguments
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79538
Martin Sebor changed:
What|Removed |Added
Status|UNCONFIRMED |NEW
Last reconfirmed||2017-03-13
Summary|missing -Wformat-overflow |missing -Wformat-overflow
|with %s and global array|with %s and non-member
|arguments |array arguments
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor ---
Confirming my own bug and adjusting the Summary to make it clear that the
problem isn't specific to global arrays and affects local arrays as well. The
following test case shows that.
$ cat z.c && gcc -O2 -S -Wall -Wextra -Wpedantic
-fdump-tree-printf-return-value=/dev/stdout z.c
int main ()
{
char d[3];
char s[] = "abcd";
__builtin_sprintf (d, "%-s", s);
__builtin_printf ("%s\n", d);
}
;; Function main (main, funcdef_no=0, decl_uid=1794, cgraph_uid=0,
symbol_order=0) (executed once)
z.c:6: __builtin_sprintf: objsize = 3, fmtstr = "%-s"
Directive 1 at offset 0: "%-s"
Result: 0, 0, -1, 9223372036854775807 (0, 0, -1, -1)
Directive 2 at offset 3: "", length = 1
main ()
{
char s[5];
char d[3];
[100.00%]:
s = "abcd";
__builtin_sprintf (, "%-s", );
__builtin_puts ();
d ={v} {CLOBBER};
s ={v} {CLOBBER};
return 0;
}
