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[NFC] Simplify BufferedStackTrace::UnwindImpl 

llvm-svn: 355381
This commit is contained in:
Vitaly Buka 2019-03-05 05:52:34 +00:00
parent 1ac22bfef0
commit 816e7b43dc
1 changed files with 8 additions and 17 deletions
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23
compiler-rt/lib/asan/asan_stack.cc
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@ -59,31 +59,22 @@ void __sanitizer::BufferedStackTrace::UnwindImpl(
size = 0;
if (UNLIKELY(!asan_inited))
return;
#if SANITIZER_WINDOWS
Unwind(max_depth, pc, bp, context, 0, 0, false);
#else
request_fast = StackTrace::WillUseFastUnwind(request_fast);
AsanThread *t = GetCurrentThread();
ScopedUnwinding unwind_scope(t);
if (!unwind_scope.CanUnwind())
return;
if (!t) {
if (!request_fast) {
/* If GetCurrentThread() has failed, try to do slow unwind anyways. */
Unwind(max_depth, pc, bp, context, 0, 0, false);
if (request_fast) {
if (t) {
Unwind(max_depth, pc, bp, nullptr, t->stack_top(), t->stack_bottom(),
true);
}
return;
}
uptr stack_top = t->stack_top();
uptr stack_bottom = t->stack_bottom();
if (SANITIZER_MIPS && !IsValidFrame(bp, stack_top, stack_bottom))
if (SANITIZER_MIPS && t &&
!IsValidFrame(bp, t->stack_top(), t->stack_bottom()))
return;
if (StackTrace::WillUseFastUnwind(request_fast))
Unwind(max_depth, pc, bp, nullptr, stack_top, stack_bottom, true);
else
Unwind(max_depth, pc, bp, context, 0, 0, false);
#endif // SANITIZER_WINDOWS
}
// ------------------ Interface -------------- {{{1