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Issue 109803002: Profiler Take 2 (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 7 years ago
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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file.
4
5 #include "platform/globals.h"
6 #if defined(TARGET_OS_ANDROID)
7
8 #include "vm/thread_interrupter.h"
9
10 namespace dart {
11
12 DECLARE_FLAG(bool, thread_interrupter);
13 DECLARE_FLAG(bool, trace_thread_interrupter);
14
15 class ThreadInterrupterAndroid : public AllStatic {
16 public:
17 static void ThreadInterruptSignalHandler(int signal, siginfo_t* info,
18 void* context_) {
19 if (signal != SIGPROF) {
20 return;
21 }
22 ThreadInterrupter::ThreadState* state =
23 ThreadInterrupter::CurrentThreadState();
24 if ((state == NULL) || (state->callback == NULL)) {
25 // No interrupter state or callback.
26 return;
27 }
28 ASSERT(Thread::Compare(state->id, Thread::GetCurrentThreadId()));
29 // Extract thread state.
30 ucontext_t* context = reinterpret_cast<ucontext_t*>(context_);
31 mcontext_t mcontext = context->uc_mcontext;
32 InterruptedThreadState its;
33 its.tid = state->id;
34 its.pc = SignalHandler::GetProgramCounter(mcontext);
35 its.fp = SignalHandler::GetFramePointer(mcontext);
36 its.sp = SignalHandler::GetStackPointer(mcontext);
37 state->callback(its, state->data);
38 }
39 };
40
41
42 void ThreadInterrupter::InterruptThreads(int64_t current_time) {
43 for (intptr_t i = 0; i < threads_size_; i++) {
44 ThreadState* state = threads_[i];
45 ASSERT(state->id != Thread::kInvalidThreadId);
46 if (FLAG_trace_thread_interrupter) {
47 OS::Print("ThreadInterrupter interrupting %p\n",
48 reinterpret_cast<void*>(state->id));
49 }
50 pthread_kill(state->id, SIGPROF);
51 }
52 }
53
54
55 void ThreadInterrupter::InstallSignalHandler() {
56 SignalHandler::Install(
57 ThreadInterrupterAndroid::ThreadInterruptSignalHandler);
58 }
59
60
61 } // namespace dart
62
63 #endif // defined(TARGET_OS_ANDROID)
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