[PATCH] D27003: Return memory to OS right after free (not in the async thread).

[Aleksey Shlyapnikov via llvm-commits]

alekseyshl created this revision.
alekseyshl added a reviewer: eugenis.
alekseyshl added a subscriber: llvm-commits.
Herald added subscribers: kubabrecka, danalbert.

In order to avoid starting a separate thread to return unused memory to
the system (the thread interferes with process startup on Android,
Zygota waits for all threads to exit before fork, but this thread never
exits), try to return it right after free.


https://reviews.llvm.org/D27003

Files:
  lib/asan/asan_allocator.cc
  lib/asan/asan_allocator.h
  lib/lsan/lsan_allocator.cc
  lib/msan/msan_allocator.cc
  lib/sanitizer_common/sanitizer_allocator.cc
  lib/sanitizer_common/sanitizer_allocator_combined.h
  lib/sanitizer_common/sanitizer_allocator_primary32.h
  lib/sanitizer_common/sanitizer_allocator_primary64.h
  lib/sanitizer_common/sanitizer_common.h
  lib/sanitizer_common/sanitizer_common_libcdep.cc
  lib/sanitizer_common/sanitizer_flag_parser.h
  lib/sanitizer_common/sanitizer_flags.inc
  lib/sanitizer_common/tests/sanitizer_allocator_test.cc
  lib/scudo/scudo_allocator.cpp
  lib/scudo/scudo_allocator.h
  lib/tsan/rtl/tsan_mman.cc
  test/asan/TestCases/Linux/release_to_os_test.cc

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