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Add missing _US_ACTION_MASK constant to unwind.h 

Summary:
During building of recent compiler-rt sources on FreeBSD for arm, I
noticed that our unwind.h (which originates in libunwind) was missing
the `_US_ACTION_MASK` constant:

    compiler-rt/lib/builtins/gcc_personality_v0.c:187:18: error: use of undeclared identifier '_US_ACTION_MASK'
        if ((state & _US_ACTION_MASK) != _US_UNWIND_FRAME_STARTING)
                     ^

It appears that both clang's internal unwind.h, and libgcc's unwind.h
define this constant as 3, so let's add this to libunwind's version too.

Reviewers: logan, kledzik, davide, emaste

Subscribers: joerg, davide, aemerson, emaste, llvm-commits

Differential Revision: https://reviews.llvm.org/D24222

llvm-svn: 280669
This commit is contained in:
Dimitry Andric 2016-09-05 18:01:13 +00:00
parent f105abbc0d
commit 84af6d10a2
1 changed files with 1 additions and 0 deletions
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libunwind/include/unwind.h
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@ -57,6 +57,7 @@ typedef uint32_t _Unwind_State;
static const _Unwind_State _US_VIRTUAL_UNWIND_FRAME = 0;
static const _Unwind_State _US_UNWIND_FRAME_STARTING = 1;
static const _Unwind_State _US_UNWIND_FRAME_RESUME = 2;
static const _Unwind_State _US_ACTION_MASK = 3;
/* Undocumented flag for force unwinding. */
static const _Unwind_State _US_FORCE_UNWIND = 8;