[PATCH] D40337: Support the setjmp(3) family of functions in TSan/NetBSD

[Kamil Rytarowski via Phabricator via llvm-commits]

krytarowski created this revision.
krytarowski added a project: Sanitizers.
Herald added a subscriber: kubamracek.

This change adds support for the setjmp(3)/longjmp(3)
family of functions on NetBSD.

There are three types of them on NetBSD:

- setjmp(3) / longjmp(3)
- sigsetjmp(3) / sigsetjmp(3)
- _setjmp(3) / _longjmp(3)

Due to historical and compat reasons the symbol
names are mangled:

- setjmp -> __setjmp14
- longjmp -> __longjmp14
- sigsetjmp -> __sigsetjmp14
- siglongjmp -> __siglongjmp14
- _setjmp -> _setjmp
- _longjmp -> _longjmp

This leads to symbol renaming in the existing codebase.

There is no such symbol as __sigsetjmp/__longsetjmp
on NetBSD

Add a comment that GNU-style executable stack
note is not needed on NetBSD. The stack is not
executable without it.

Correct mangled_sp reading in LongJmp(),
the proper index is 6, not 2.

Sponsored by <The NetBSD Foundation>


Repository:
  rL LLVM

https://reviews.llvm.org/D40337

Files:
  lib/tsan/rtl/tsan_interceptors.cc
  lib/tsan/rtl/tsan_rtl_amd64.S

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