[Bug sanitizer/59410] New: Some tsan tests fail with 4GB RAM

["hjl.tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59410

            Bug ID: 59410
           Summary: Some tsan tests fail with 4GB RAM
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail 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

On a Linux/x86-64 machine with 4GB RAM, I got failures like:

FAIL: c-c++-common/tsan/atomic_stack.c  -O0  output pattern test, is FATAL:
ThreadSanitizer can not mmap the shadow memory (something is mapped at
0x555555554000 < 0x7cf000000000)
FAIL: c-c++-common/tsan/atomic_stack.c  -O1  output pattern test, is FATAL:
ThreadSanitizer can not mmap the shadow memory (something is mapped at
0x555555554000 < 0x7cf000000000)
FAIL: c-c++-common/tsan/atomic_stack.c  -O2  output pattern test, is FATAL:
ThreadSanitizer can not mmap the shadow memory (something is mapped at
0x555555554000 < 0x7cf000000000)
FAIL: c-c++-common/tsan/atomic_stack.c  -O3 -fomit-frame-pointer  output
pattern test, is FATAL: ThreadSanitizer can not mmap the shadow memory
(something is mapped at 0x555555554000 < 0x7cf000000000)
FAIL: c-c++-common/tsan/atomic_stack.c  -O3 -g  output pattern test, is FATAL:
ThreadSanitizer can not mmap the shadow memory (something is mapped at
0x555555554000 < 0x7cf000000000)
FAIL: c-c++-common/tsan/atomic_stack.c  -Os  output pattern test, is FATAL:
ThreadSanitizer can not mmap the shadow memory (something is mapped at
0x555555554000 < 0x7cf000000000)
FAIL: c-c++-common/tsan/atomic_stack.c  -O2 -flto -fno-use-linker-plugin
-flto-partition=none  output pattern test, is FATAL: ThreadSanitizer can not
mmap the shadow memory (something is mapped at 0x555555554000 < 0x7cf000000000)
FAIL: c-c++-common/tsan/atomic_stack.c  -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects  output pattern test, is FATAL: ThreadSanitizer can not
mmap the shadow memory (something is mapped at 0x555555554000 < 0x7cf000000000)
FAIL: c-c++-common/tsan/fd_pipe_race.c  -O0  output pattern test, is FATAL:
ThreadSanitizer can not mmap the shadow memory (something is mapped at
0x555555554000 < 0x7cf000000000)
FAIL: c-c++-common/tsan/fd_pipe_race.c  -O1  output pattern test, is FATAL:
ThreadSanitizer can not mmap the shadow memory (something is mapped at
0x555555554000 < 0x7cf000000000)
FAIL: c-c++-common/tsan/fd_pipe_race.c  -O2  output pattern test, is FATAL:
ThreadSanitizer can not mmap the shadow memory (something is mapped at
0x555555554000 < 0x7cf000000000)

I didn't get those on machines with >= 6GB RAM.