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* [Bug sanitizer/94910] New: detect_stack_use_after_return=1 is much slower than clang's
@ 2020-05-01 20:51 rafael at espindo dot la
  2020-05-04  5:27 ` [Bug sanitizer/94910] " marxin at gcc dot gnu.org
                   ` (15 more replies)
  0 siblings, 16 replies; 17+ messages in thread
From: rafael at espindo dot la @ 2020-05-01 20:51 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94910

            Bug ID: 94910
           Summary: detect_stack_use_after_return=1 is much slower than
                    clang's
           Product: gcc
           Version: 9.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: rafael at espindo dot la
                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, marxin at gcc dot gnu.org
  Target Milestone: ---

The test I am using is from https://github.com/scylladb/seastar/. It can be
build with

$ cmake -DCMAKE_BUILD_TYPE=Debug -GNinja <src>
$ ninja tests/unit/chunked_fifo_test

And can be run with:

Clang:

$ time ASAN_OPTIONS=detect_stack_use_after_return=1
./tests/unit/chunked_fifo_test -t chunked_fifo_big
...
1.80s user 0.02s system 99% cpu 1.826 total
$ time ASAN_OPTIONS=detect_stack_use_after_return=0
./tests/unit/chunked_fifo_test -t chunked_fifo_big
...
1.67s user 0.01s system 99% cpu 1.691 total

GCC:

$ time ASAN_OPTIONS=detect_stack_use_after_return=1
./tests/unit/chunked_fifo_test -t chunked_fifo_big
89.12s user 0.03s system 99% cpu 1:29.34 total
$ time ASAN_OPTIONS=detect_stack_use_after_return=0
./tests/unit/chunked_fifo_test -t chunked_fifo_big
1.32s user 0.02s system 99% cpu 1.350 total


So while plain asan is faster with gcc, enabling detect_stack_use_after_return
makes it much slower.

^ permalink raw reply	[flat|nested] 17+ messages in thread
end of thread, other threads:[~2020-06-12  8:30 UTC | newest]

Thread overview: 17+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-01 20:51 [Bug sanitizer/94910] New: detect_stack_use_after_return=1 is much slower than clang's rafael at espindo dot la
2020-05-04  5:27 ` [Bug sanitizer/94910] " marxin at gcc dot gnu.org
2020-05-15 11:31 ` marxin at gcc dot gnu.org
2020-05-15 16:28 ` rafael at espindo dot la
2020-05-18  9:11 ` marxin at gcc dot gnu.org
2020-05-18  9:12 ` marxin at gcc dot gnu.org
2020-05-18 10:39 ` jakub at gcc dot gnu.org
2020-05-19 13:26 ` marxin at gcc dot gnu.org
2020-05-19 21:05 ` rafael at espindo dot la
2020-05-20  9:11 ` marxin at gcc dot gnu.org
2020-05-25  8:32 ` marxin at gcc dot gnu.org
2020-06-10 11:19 ` cvs-commit at gcc dot gnu.org
2020-06-10 11:20 ` marxin at gcc dot gnu.org
2020-06-12  8:03 ` cvs-commit at gcc dot gnu.org
2020-06-12  8:17 ` cvs-commit at gcc dot gnu.org
2020-06-12  8:30 ` cvs-commit at gcc dot gnu.org
2020-06-12  8:30 ` marxin at gcc dot gnu.org

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