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55 lines
2.0 KiB
C++
55 lines
2.0 KiB
C++
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// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/mac/call_with_eh_frame.h"
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#include <stdint.h>
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#include <unwind.h>
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#include "build/build_config.h"
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namespace base {
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namespace mac {
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#if defined(OS_IOS)
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// No iOS assembly implementation exists, so just call the block directly.
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void CallWithEHFrame(void (^block)(void)) {
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block();
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}
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#else // OS_MACOSX
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extern "C" _Unwind_Reason_Code __gxx_personality_v0(int,
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_Unwind_Action,
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uint64_t,
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struct _Unwind_Exception*,
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struct _Unwind_Context*);
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_Unwind_Reason_Code CxxPersonalityRoutine(
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int version,
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_Unwind_Action actions,
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uint64_t exception_class,
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struct _Unwind_Exception* exception_object,
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struct _Unwind_Context* context) {
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// Unwinding is a two-phase process: phase one searches for an exception
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// handler, and phase two performs cleanup. For phase one, this custom
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// personality will terminate the search. For phase two, this should delegate
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// back to the standard personality routine.
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if ((actions & _UA_SEARCH_PHASE) != 0) {
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// Tell libunwind that this is the end of the stack. When it encounters the
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// CallWithEHFrame, it will stop searching for an exception handler. The
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// result is that no exception handler has been found higher on the stack,
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// and any that are lower on the stack (e.g. in CFRunLoopRunSpecific), will
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// now be skipped. Since this is reporting the end of the stack, and no
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// exception handler will have been found, std::terminate() will be called.
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return _URC_END_OF_STACK;
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}
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return __gxx_personality_v0(version, actions, exception_class,
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exception_object, context);
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}
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#endif // defined(OS_IOS)
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} // namespace mac
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} // namespace base
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