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runtime/vm/thread_interrupter.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_THREAD_INTERRUPTER_H_
 #define VM_THREAD_INTERRUPTER_H_
 
 #include "vm/allocation.h"
 #include "vm/signal_handler.h"
 #include "vm/os_thread.h"
 
 
 namespace dart {
 
 struct InterruptedThreadState {
   ThreadId tid;
   uintptr_t pc;
   uintptr_t csp;
   uintptr_t dsp;
   uintptr_t fp;
+  uintptr_t lr;
 };
 
 // When a thread is interrupted the thread specific interrupt callback will be
 // invoked. Each callback is given an InterruptedThreadState and the user data
 // pointer. When inside a thread interrupt callback doing any of the following
 // is forbidden:
 //   * Accessing TLS.
 //   * Allocating memory.
 //   * Taking a lock.
 typedef void (*ThreadInterruptCallback)(const InterruptedThreadState& state,
@@ skipping 61 matching lines @@
   static void InstallSignalHandler();
 
   friend class ThreadInterrupterVisitIsolates;
 };
 
 void ThreadInterruptNoOp(const InterruptedThreadState& state, void* data);
 
 }  // namespace dart
 
 #endif  // VM_THREAD_INTERRUPTER_H_