[Bug sanitizer/99168] inconsistent behavior on -O0 and -O2 with ASAN on
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99168 Martin Liška changed: What|Removed |Added Resolution|--- |FIXED Status|ASSIGNED|RESOLVED --- Comment #7 from Martin Liška --- Fixed on master.
[Bug sanitizer/99168] inconsistent behavior on -O0 and -O2 with ASAN on
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99168 --- Comment #6 from CVS Commits --- The master branch has been updated by Martin Liska : https://gcc.gnu.org/g:3f8384545784696fbd66aaec24a998a819e912c5 commit r11-7346-g3f8384545784696fbd66aaec24a998a819e912c5 Author: Martin Liska Date: Tue Feb 23 09:01:53 2021 +0100 IPA ICF + ASAN: do not merge vars with different alignment gcc/ChangeLog: PR sanitizer/99168 * ipa-icf.c (sem_variable::merge): Do not merge 2 variables with different alignment. That leads to an invalid red zone size allocated in runtime. gcc/testsuite/ChangeLog: PR sanitizer/99168 * c-c++-common/asan/pr99168.c: New test.
[Bug sanitizer/99168] inconsistent behavior on -O0 and -O2 with ASAN on
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99168 --- Comment #5 from Martin Liška --- (In reply to zhan3299 from comment #4) > (In reply to Martin Liška from comment #3) > > Very interesting issue, the failure is caused by IPA ICF that merges 2 > > variables with different alignments. I've got a patch candidate. > > Hi, just curious because I am also studying the source code of GCC. > > Is this issue is about sanitizer or optimization? It's bad optimization done by IPA ICF. The issue is gone with -fno-ipa-icf.
[Bug sanitizer/99168] inconsistent behavior on -O0 and -O2 with ASAN on
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99168 --- Comment #4 from zhan3299 at purdue dot edu --- (In reply to Martin Liška from comment #3) > Very interesting issue, the failure is caused by IPA ICF that merges 2 > variables with different alignments. I've got a patch candidate. Hi, just curious because I am also studying the source code of GCC. Is this issue is about sanitizer or optimization?
[Bug sanitizer/99168] inconsistent behavior on -O0 and -O2 with ASAN on
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99168 --- Comment #3 from Martin Liška --- Very interesting issue, the failure is caused by IPA ICF that merges 2 variables with different alignments. I've got a patch candidate.
[Bug sanitizer/99168] inconsistent behavior on -O0 and -O2 with ASAN on
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99168 Martin Liška changed: What|Removed |Added Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org Ever confirmed|0 |1 Status|UNCONFIRMED |ASSIGNED Last reconfirmed||2021-02-22 --- Comment #2 from Martin Liška --- I'll take a look.
