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[asan] Restore check removed by r332033
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Authored by waltl on May 16 2018, 3:25 PM.

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Summary

Needed by fiber handling code, and possibly other code paths.

Repository

rL LLVM

Build Status

Buildable 18217
Build 18217: arc lint + arc unit

This revision is now accepted and ready to land.May 16 2018, 3:36 PM

This revision was automatically updated to reflect the committed changes.

Path

Size

compiler-rt/

lib/

asan/

2 lines

Show First 20 Lines • Show All 111 Lines • ▼ Show 20 Lines	return !atomic_load(&stack_switching_, memory_order_relaxed) &&
(reinterpret_cast<uptr>(fake_stack_) > 1);		(reinterpret_cast<uptr>(fake_stack_) > 1);
}		}

FakeStack *fake_stack() {		FakeStack *fake_stack() {
if (!__asan_option_detect_stack_use_after_return)		if (!__asan_option_detect_stack_use_after_return)
return nullptr;		return nullptr;
if (atomic_load(&stack_switching_, memory_order_relaxed))		if (atomic_load(&stack_switching_, memory_order_relaxed))
return nullptr;		return nullptr;
		if (!has_fake_stack())
		return AsyncSignalSafeLazyInitFakeStack();
return fake_stack_;		return fake_stack_;
}		}

// True is this thread is currently unwinding stack (i.e. collecting a stack		// True is this thread is currently unwinding stack (i.e. collecting a stack
// trace). Used to prevent deadlocks on platforms where libc unwinder calls		// trace). Used to prevent deadlocks on platforms where libc unwinder calls
// malloc internally. See PR17116 for more details.		// malloc internally. See PR17116 for more details.
bool isUnwinding() const { return unwinding_; }		bool isUnwinding() const { return unwinding_; }
void setUnwinding(bool b) { unwinding_ = b; }		void setUnwinding(bool b) { unwinding_ = b; }
▲ Show 20 Lines • Show All 70 Lines • Show Last 20 Lines