** Also affects: gcc-6 (Ubuntu Zesty)
   Importance: Undecided
       Status: New

** Also affects: gcc-6 (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: gcc-5 (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1709727

Title:
  asan causes hangs on arm64

Status in gcc-5 package in Ubuntu:
  New
Status in gcc-6 package in Ubuntu:
  New
Status in gcc-5 source package in Xenial:
  New
Status in gcc-6 source package in Xenial:
  New
Status in gcc-5 source package in Zesty:
  New
Status in gcc-6 source package in Zesty:
  New

Bug description:
  [Impact]
  Binaries built w/ asan support hang on arm64. This causes many timeouts 
during the test phase of a gcc build, causing builds to need ~24 hours to 
complete.

  [Test Case]
  $ cat test.c
  #include <stdio.h>

  void main() {
    printf("hi.\n");
  }
  $ gcc test.c -g -fsanitize=address -fno-omit-frame-pointer test.c -o test
  $ ./test
  ==46644==AddressSanitizer CHECK failed: 
../../../../src/libsanitizer/sanitizer_common/sanitizer_allocator.h:844 
"((res)) < ((kNumPossibleRegions))" (0xffffb4b, 0x8000000)
  [... HANG ...]

  [Regression Risk]

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