[Mac] Redo NSException handling, and generate better stacks for C++ exceptions.

base/message_loop/message_pump_mac.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "base/message_loop/message_pump_mac.h"
 
 #include <dlfcn.h>
 #import <Foundation/Foundation.h>
 
 #include <limits>
 
 #include "base/logging.h"
+#include "base/mac/call_with_eh_frame.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/message_loop/timer_slack.h"
 #include "base/run_loop.h"
 #include "base/time/time.h"
 
 #if !defined(OS_IOS)
 #import <AppKit/AppKit.h>
 #endif  // !defined(OS_IOS)
 
 namespace base {
@@ skipping 270 matching lines @@
   // In order to establish the proper priority in which work and delayed work
   // are processed one for one, the timer used to schedule delayed work must
   // signal a CFRunLoopSource used to dispatch both work and delayed work.
   CFRunLoopSourceSignal(self->work_source_);
 }
 
 // Called from the run loop.
 // static
 void MessagePumpCFRunLoopBase::RunWorkSource(void* info) {
   MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
-  self->RunWork();
+  base::mac::CallWithEHFrame(^{
+    self->RunWork();
+  });
 }
 
 // Called by MessagePumpCFRunLoopBase::RunWorkSource.
 bool MessagePumpCFRunLoopBase::RunWork() {
   if (!delegate_) {
     // This point can be reached with a NULL delegate_ if Run is not on the
     // stack but foreign code is spinning the CFRunLoop.  Arrange to come back
     // here when a delegate is available.
     delegateless_work_ = true;
     return false;
@@ skipping 38 matching lines @@
     CFRunLoopSourceSignal(work_source_);
   }
 
   return resignal_work_source;
 }
 
 // Called from the run loop.
 // static
 void MessagePumpCFRunLoopBase::RunIdleWorkSource(void* info) {
   MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
-  self->RunIdleWork();
+  base::mac::CallWithEHFrame(^{
+    self->RunIdleWork();
+  });
 }
 
 // Called by MessagePumpCFRunLoopBase::RunIdleWorkSource.
 bool MessagePumpCFRunLoopBase::RunIdleWork() {
   if (!delegate_) {
     // This point can be reached with a NULL delegate_ if Run is not on the
     // stack but foreign code is spinning the CFRunLoop.  Arrange to come back
     // here when a delegate is available.
     delegateless_idle_work_ = true;
     return false;
@@ skipping 13 matching lines @@
     CFRunLoopSourceSignal(idle_work_source_);
   }
 
   return did_work;
 }
 
 // Called from the run loop.
 // static
 void MessagePumpCFRunLoopBase::RunNestingDeferredWorkSource(void* info) {
   MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
-  self->RunNestingDeferredWork();
+  base::mac::CallWithEHFrame(^{
+    self->RunNestingDeferredWork();
+  });
 }
 
 // Called by MessagePumpCFRunLoopBase::RunNestingDeferredWorkSource.
 bool MessagePumpCFRunLoopBase::RunNestingDeferredWork() {
   if (!delegate_) {
     // This point can be reached with a NULL delegate_ if Run is not on the
     // stack but foreign code is spinning the CFRunLoop.  There's no sense in
     // attempting to do any work or signalling the work sources because
     // without a delegate, work is not possible.
     return false;
@@ skipping 26 matching lines @@
     CFRunLoopSourceSignal(nesting_deferred_work_source_);
   }
 }
 
 // Called from the run loop.
 // static
 void MessagePumpCFRunLoopBase::PreWaitObserver(CFRunLoopObserverRef observer,
                                                CFRunLoopActivity activity,
                                                void* info) {
   MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
+  base::mac::CallWithEHFrame(^{
+    // Attempt to do some idle work before going to sleep.
+    self->RunIdleWork();
 
-  // Attempt to do some idle work before going to sleep.
-  self->RunIdleWork();
-
-  // The run loop is about to go to sleep.  If any of the work done since it
-  // started or woke up resulted in a nested run loop running,
-  // nesting-deferred work may have accumulated.  Schedule it for processing
-  // if appropriate.
-  self->MaybeScheduleNestingDeferredWork();
+    // The run loop is about to go to sleep.  If any of the work done since it
+    // started or woke up resulted in a nested run loop running,
+    // nesting-deferred work may have accumulated.  Schedule it for processing
+    // if appropriate.
+    self->MaybeScheduleNestingDeferredWork();
+  });
 }
 
 // Called from the run loop.
 // static
 void MessagePumpCFRunLoopBase::PreSourceObserver(CFRunLoopObserverRef observer,
                                                  CFRunLoopActivity activity,
                                                  void* info) {
   MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
 
   // The run loop has reached the top of the loop and is about to begin
   // processing sources.  If the last iteration of the loop at this nesting
   // level did not sleep or exit, nesting-deferred work may have accumulated
   // if a nested loop ran.  Schedule nesting-deferred work for processing if
   // appropriate.
-  self->MaybeScheduleNestingDeferredWork();
+  base::mac::CallWithEHFrame(^{
+    self->MaybeScheduleNestingDeferredWork();
+  });
 }
 
 // Called from the run loop.
 // static
 void MessagePumpCFRunLoopBase::EnterExitObserver(CFRunLoopObserverRef observer,
                                                  CFRunLoopActivity activity,
                                                  void* info) {
   MessagePumpCFRunLoopBase* self = static_cast<MessagePumpCFRunLoopBase*>(info);
 
   switch (activity) {
@@ skipping 14 matching lines @@
       // native loops use CFRunLoop in this way.  Because PreWaitObserver will
       // not be called in these case, MaybeScheduleNestingDeferredWork needs
       // to be called here, as the run loop exits.
       //
       // MaybeScheduleNestingDeferredWork consults self->nesting_level_
       // to determine whether to schedule nesting-deferred work.  It expects
       // the nesting level to be set to the depth of the loop that is going
       // to sleep or exiting.  It must be called before decrementing the
       // value so that the value still corresponds to the level of the exiting
       // loop.
-      self->MaybeScheduleNestingDeferredWork();
+      base::mac::CallWithEHFrame(^{
+        self->MaybeScheduleNestingDeferredWork();
+      });
       --self->nesting_level_;
       break;
 
     default:
       break;
   }
 
-  self->EnterExitRunLoop(activity);
+  base::mac::CallWithEHFrame(^{
+    self->EnterExitRunLoop(activity);
+  });
 }
 
 // Called by MessagePumpCFRunLoopBase::EnterExitRunLoop.  The default
 // implementation is a no-op.
 void MessagePumpCFRunLoopBase::EnterExitRunLoop(CFRunLoopActivity activity) {
 }
 
 // Base version returns a standard NSAutoreleasePool.
 AutoreleasePoolType* MessagePumpCFRunLoopBase::CreateAutoreleasePool() {
   return [[NSAutoreleasePool alloc] init];
@@ skipping 248 matching lines @@
     [NSApplication sharedApplication];
     g_not_using_cr_app = true;
     return new MessagePumpNSApplication;
 #endif
   }
 
   return new MessagePumpNSRunLoop;
 }
 
 }  // namespace base