[PATCH] D72108: [TSan] Initialize injected mach threads

[Julian Lettner via Phabricator via llvm-commits]

yln created this revision.
Herald added subscribers: llvm-commits, Sanitizers, jfb.
Herald added projects: Sanitizers, LLVM.

Previously, TSan was crashing on the first call to malloc from an
injected mach thread.  Such threads are created via the
`thread_create_running` and then turned into a pthread via the
`pthread_create_from_mach_thread` SPI.

The reason for this is that TSan needs to do some initialization to
avoid crashing later inside interceptors.  We identify a mach thread by
checking whether we have seen this thread before on "thread_start".  All
other threads will be known (`ThreadTid` returns a valid thread
identifier); only mach threads, which don't receive the "thread_create"
event, haven't been registered with TSan yet.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D72108

Files:
  compiler-rt/lib/sanitizer_common/sanitizer_thread_registry.h
  compiler-rt/lib/tsan/rtl/tsan_platform_mac.cpp
  compiler-rt/lib/tsan/rtl/tsan_report.cpp

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