[PATCH] D34731: [Sanitizers] Operator new() interceptors always die on allocation error

[Aleksey Shlyapnikov via Phabricator via llvm-commits]

alekseyshl created this revision.
Herald added a subscriber: kubamracek.

Operator new interceptors behavior is now controlled by their nothrow
property as well as by allocator_may_return_null flag value:

- allocator_may_return_null=* + new()        - die on allocation error
- allocator_may_return_null=0 + new(nothrow) - die on allocation error
- allocator_may_return_null=1 + new(nothrow) - return null

Ideally new() should throw std::bad_alloc exception, but that is not
trivial to achieve, hence TODO.


https://reviews.llvm.org/D34731

Files:
  lib/asan/asan_allocator.cc
  lib/asan/asan_new_delete.cc
  lib/lsan/lsan_interceptors.cc
  lib/msan/msan_new_delete.cc
  lib/scudo/scudo_new_delete.cpp
  lib/tsan/rtl/tsan_new_delete.cc
  test/asan/TestCases/allocator_returns_null.cc
  test/msan/allocator_returns_null.cc
  test/scudo/sizes.cpp
  test/tsan/allocator_returns_null.cc

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