Small fixes for Android.

runtime/vm/thread_interrupter_android.cc

 // 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.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_ANDROID)
 
+#include <sys/syscall.h>  // NOLINT
+
 #include "vm/signal_handler.h"
 #include "vm/thread_interrupter.h"
 
 namespace dart {
 
 DECLARE_FLAG(bool, thread_interrupter);
 DECLARE_FLAG(bool, trace_thread_interrupter);
 
 class ThreadInterrupterAndroid : public AllStatic {
  public:
   static void ThreadInterruptSignalHandler(int signal, siginfo_t* info,
                                            void* context_) {
     if (signal != SIGPROF) {
       return;
     }
     InterruptableThreadState* state = ThreadInterrupter::CurrentThreadState();
     if ((state == NULL) || (state->callback == NULL)) {
       // No interrupter state or callback.
       return;
     }
     ASSERT(Thread::Compare(state->id, Thread::GetCurrentThreadId()));
+    // Extract thread state.
+    ucontext_t* context = reinterpret_cast<ucontext_t*>(context_);
+    mcontext_t mcontext = context->uc_mcontext;
+    InterruptedThreadState its;
+    its.tid = state->id;
+    its.pc = SignalHandler::GetProgramCounter(mcontext);
+    its.fp = SignalHandler::GetFramePointer(mcontext);
+    its.sp = SignalHandler::GetStackPointer(mcontext);
+    state->callback(its, state->data);
   }
 };
 
 
 void ThreadInterrupter::InterruptThread(InterruptableThreadState* state) {
   if (FLAG_trace_thread_interrupter) {
     OS::Print("ThreadInterrupter interrupting %p\n",
               reinterpret_cast<void*>(state->id));
   }
-  pthread_kill(state->id, SIGPROF);
+  syscall(__NR_tgkill, getpid(), state->id, SIGPROF);
 }
 
 
 void ThreadInterrupter::InstallSignalHandler() {
   SignalHandler::Install(
       ThreadInterrupterAndroid::ThreadInterruptSignalHandler);
 }
 
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_ANDROID)