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* [Bug sanitizer/59503] New: Bogus integer-overflow error with long long with -m32 @ 2013-12-14 0:57 mpolacek at gcc dot gnu.org 2013-12-14 0:58 ` [Bug sanitizer/59503] " mpolacek at gcc dot gnu.org ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: mpolacek at gcc dot gnu.org @ 2013-12-14 0:57 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59503 Bug ID: 59503 Summary: Bogus integer-overflow error with long long with -m32 Product: gcc Version: 4.9.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: sanitizer Assignee: unassigned at gcc dot gnu.org Reporter: mpolacek at gcc dot gnu.org CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org, jakub at gcc dot gnu.org, kcc at gcc dot gnu.org We wrongly issue runtime error on: int main (void) { long long int a = 14; long int b = 9; if ((a - b) != 5) __builtin_abort (); return 0; } $ gcc -O0 -fsanitize=signed-integer-overflow -m32 bug.c $ ./a.out bug.c:6:10: runtime error: signed integer overflow: 14 - 9 cannot be represented in type 'long long int' Aborted This happens on PPC64 as well, as the bug is in generic handling of add/sub instrumentation. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug sanitizer/59503] Bogus integer-overflow error with long long with -m32 2013-12-14 0:57 [Bug sanitizer/59503] New: Bogus integer-overflow error with long long with -m32 mpolacek at gcc dot gnu.org @ 2013-12-14 0:58 ` mpolacek at gcc dot gnu.org 2013-12-14 12:20 ` mpolacek at gcc dot gnu.org 2013-12-14 12:20 ` mpolacek at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: mpolacek at gcc dot gnu.org @ 2013-12-14 0:58 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59503 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |ASSIGNED Last reconfirmed| |2013-12-14 Assignee|unassigned at gcc dot gnu.org |mpolacek at gcc dot gnu.org Target Milestone|--- |4.9.0 Ever confirmed|0 |1 --- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> --- I have a fix. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug sanitizer/59503] Bogus integer-overflow error with long long with -m32 2013-12-14 0:57 [Bug sanitizer/59503] New: Bogus integer-overflow error with long long with -m32 mpolacek at gcc dot gnu.org 2013-12-14 0:58 ` [Bug sanitizer/59503] " mpolacek at gcc dot gnu.org @ 2013-12-14 12:20 ` mpolacek at gcc dot gnu.org 2013-12-14 12:20 ` mpolacek at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: mpolacek at gcc dot gnu.org @ 2013-12-14 12:20 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59503 Marek Polacek <mpolacek at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED --- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Fixed. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug sanitizer/59503] Bogus integer-overflow error with long long with -m32 2013-12-14 0:57 [Bug sanitizer/59503] New: Bogus integer-overflow error with long long with -m32 mpolacek at gcc dot gnu.org 2013-12-14 0:58 ` [Bug sanitizer/59503] " mpolacek at gcc dot gnu.org 2013-12-14 12:20 ` mpolacek at gcc dot gnu.org @ 2013-12-14 12:20 ` mpolacek at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: mpolacek at gcc dot gnu.org @ 2013-12-14 12:20 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59503 --- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Author: mpolacek Date: Sat Dec 14 12:19:56 2013 New Revision: 205984 URL: http://gcc.gnu.org/viewcvs?rev=205984&root=gcc&view=rev Log: PR sanitizer/59503 * internal-fn.c (ubsan_expand_si_overflow_addsub_check): Call expand_binop with correct optab depending on code. testsuite/ * c-c++-common/ubsan/pr59503.c: New test. Added: trunk/gcc/testsuite/c-c++-common/ubsan/pr59503.c Modified: trunk/gcc/ChangeLog trunk/gcc/internal-fn.c trunk/gcc/testsuite/ChangeLog ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-12-14 12:20 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2013-12-14 0:57 [Bug sanitizer/59503] New: Bogus integer-overflow error with long long with -m32 mpolacek at gcc dot gnu.org 2013-12-14 0:58 ` [Bug sanitizer/59503] " mpolacek at gcc dot gnu.org 2013-12-14 12:20 ` mpolacek at gcc dot gnu.org 2013-12-14 12:20 ` mpolacek at gcc dot gnu.org
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