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From: "doko at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/67308] New: FATAL: ThreadSanitizer: unexpected memory mapping
Date: Fri, 21 Aug 2015 14:45:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: sanitizer
X-Bugzilla-Version: 5.2.1
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X-Bugzilla-Who: doko at gcc dot gnu.org
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67308

            Bug ID: 67308
           Summary: FATAL: ThreadSanitizer: unexpected memory mapping
           Product: gcc
           Version: 5.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko 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
  Target Milestone: ---

[forwarded from https://bugs.debian.org/796246]

seen on the gcc-5-branch.

$ uname -r
4.1.0-3-generic
$ echo 'void main(void){}' | gcc -pie -fPIE -fsanitize=thread -xc - -ltsan &&
./a.out
FATAL: ThreadSanitizer: unexpected memory mapping 0x555caf24a000-0x555caf24b000

"""
There was an intentional change in the kernel that causes PIEs to be
loaded in a different address range:

https://git.kernel.org/linus/d1fd836dcf00d2028c700c7e44d2c23404062c90

I think ThreadSanitizer is just going to have to learn about this.
"""