[PATCH] D56141: [asan] Support running without /proc

[Evgenii Stepanov via Phabricator via llvm-commits]

eugenis created this revision.
eugenis added reviewers: vitalybuka, pcc, krytarowski.
Herald added a subscriber: kubamracek.

This patch lets ASan run when /proc is not accessible (ex. not mounted
yet). It includes a special test-only flag that emulates this condition
in an unpriviledged process.

This only matters on Linux, where /proc is necessary to enumerate
virtual memory mappings.


https://reviews.llvm.org/D56141

Files:
  compiler-rt/lib/asan/asan_thread.cc
  compiler-rt/lib/hwasan/hwasan_thread.cc
  compiler-rt/lib/sanitizer_common/sanitizer_flags.inc
  compiler-rt/lib/sanitizer_common/sanitizer_linux.cc
  compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cc
  compiler-rt/lib/sanitizer_common/sanitizer_mac.cc
  compiler-rt/lib/sanitizer_common/sanitizer_posix.cc
  compiler-rt/lib/sanitizer_common/sanitizer_posix.h
  compiler-rt/lib/sanitizer_common/sanitizer_procmaps.h
  compiler-rt/lib/sanitizer_common/sanitizer_procmaps_bsd.cc
  compiler-rt/lib/sanitizer_common/sanitizer_procmaps_common.cc
  compiler-rt/lib/sanitizer_common/sanitizer_procmaps_linux.cc
  compiler-rt/lib/sanitizer_common/sanitizer_procmaps_solaris.cc
  compiler-rt/test/asan/TestCases/Posix/no-fd.cc

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