base/mac/call_with_eh_frame.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/mac/call_with_eh_frame.h"
   6
   7 #include <unwind.h>
   8
   9 #include "build/build_config.h"
  10
  11 namespace base {
  12 namespace mac {
  13
  14 _Unwind_Reason_Code CxxPersonalityRoutine(
  15     int version,
  16     _Unwind_Action actions,
  17     uint64_t exceptionClass,
  18     struct _Unwind_Exception* exceptionObject,
  19     struct _Unwind_Context* context) {
  20   // Tell libunwind that this is the end of the stack. When it encounters the
  21   // CallWithEHFrame, it will stop searching for an exception handler. The
  22   // result is that no exception handler has been found higher on the stack,
  23   // and any that are lower on the stack (e.g. in CFRunLoopRunSpecific), will
  24   // now be skipped. Since this is reporting the end of the stack, and no
  25   // exception handler will have been found, std::terminate() will be called.
  26   return _URC_END_OF_STACK;
  27 }
  28
  29 #if defined(OS_IOS)
  30 // No iOS assembly implementation exists, so just call the block directly.
  31 void CallWithEHFrame(void (^block)(void)) {
  32   block();
  33 }
  34 #endif
  35
  36 }  // namespace mac
  37 }  // namespace base