[PATCH] D67738: [lsan] Fix deadlock in dl_iterate_phdr.

[Evgenii Stepanov via Phabricator via llvm-commits]

eugenis created this revision.
eugenis added reviewers: vitalybuka, hctim.
Herald added subscribers: Sanitizers, jfb.
Herald added projects: Sanitizers, LLVM.

Do not grab the allocator lock before calling dl_iterate_phdr. This may
cause a lock order inversion with (valid) user code that uses malloc
inside a dl_iterate_phdr callback.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D67738

Files:
  compiler-rt/lib/lsan/lsan_common.cpp
  compiler-rt/lib/lsan/lsan_common.h
  compiler-rt/lib/lsan/lsan_common_linux.cpp
  compiler-rt/lib/lsan/lsan_common_mac.cpp
  compiler-rt/test/lsan/TestCases/Linux/libdl_deadlock.cpp

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