http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58718
Bug ID: 58718
Summary: Invalid check in libsanitizer
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: y.gribov at samsung dot com
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
Created attachment 30998
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30998&action=edit
Repro
I've recently tried to run AddressSanitizer with malloc_context_size=0 runtime
option to speedup execution of my program. I got nice perf improvements but
also an internal abort in asan_allocator2.cc when it tried to report heap
overflow warning:
0x60040000e004 is located 4 bytes to the right of 16-byte region
[0x60040000dff0,0x60040000e000)
==3488== AddressSanitizer CHECK failed:
/home/ygribov/gcc/gcc-master/libsanitizer/asan/asan_allocator2.cc:216 "((id))
!= (0)" (0x0, 0x0)
If I unset ASAN_OPTIONS, warning is reported correctly.
-Y
