[PATCH] D33322: Use write instead of read permissions to check for global sections on mac

[Francis Ricci via Phabricator via llvm-commits]

fjricci created this revision.

The LINKEDIT section is very large and is read-only. Scanning this
section caused LSan on darwin to be very slow. When only writable sections
are scanned for global pointers, performance improved by a factor of about 25x.


https://reviews.llvm.org/D33322

Files:
  lib/lsan/lsan_common_mac.cc
  lib/sanitizer_common/sanitizer_common.cc
  lib/sanitizer_common/sanitizer_common.h
  lib/sanitizer_common/sanitizer_linux_libcdep.cc
  lib/sanitizer_common/sanitizer_procmaps_common.cc
  lib/sanitizer_common/sanitizer_procmaps_mac.cc
  lib/sanitizer_common/sanitizer_win.cc

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