johnmccutchan@google.com
919dc2d6eb
* Threads can only register and unregister themselves with ThreadInterrupter. * Profiler is no longer involved in interrupting threads. It's just a callback and the buffer. * Profiler operates lock free using an atomic operation to reserve sample in sample buffer. * Linux, Mac, and Windows done. R=asiva@google.com Review URL: https://codereview.chromium.org//109803002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@31170 260f80e4-7a28-3924-810f-c04153c831b5
99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h"
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#if defined(TARGET_OS_WINDOWS)
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#include "vm/thread_interrupter.h"
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namespace dart {
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DECLARE_FLAG(bool, thread_interrupter);
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DECLARE_FLAG(bool, trace_thread_interrupter);
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#define kThreadError -1
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class ThreadInterrupterWin : public AllStatic {
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public:
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static bool GrabRegisters(ThreadId thread, InterruptedThreadState* state) {
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CONTEXT context;
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memset(&context, 0, sizeof(context));
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context.ContextFlags = CONTEXT_FULL;
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if (GetThreadContext(thread, &context) != 0) {
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#if defined(TARGET_ARCH_IA32)
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state->pc = static_cast<uintptr_t>(context.Eip);
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state->fp = static_cast<uintptr_t>(context.Ebp);
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state->sp = static_cast<uintptr_t>(context.Esp);
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#elif defined(TARGET_ARCH_X64)
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state->pc = reinterpret_cast<uintptr_t>(context.Rip);
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state->fp = reinterpret_cast<uintptr_t>(context.Rbp);
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state->sp = reinterpret_cast<uintptr_t>(context.Rsp);
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#else
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UNIMPLEMENTED();
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#endif
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return true;
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}
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return false;
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}
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static void Interrupt(ThreadInterrupter::ThreadState* state) {
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ASSERT(GetCurrentThread() != state->id);
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DWORD result = SuspendThread(state->id);
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if (result == kThreadError) {
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if (FLAG_trace_thread_interrupter) {
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OS::Print("ThreadInterrupted failed to suspend thread %p\n",
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reinterpret_cast<void*>(state->id));
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}
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return;
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}
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InterruptedThreadState its;
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its.tid = state->id;
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if (!GrabRegisters(state->id, &its)) {
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// Failed to get thread registers.
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ResumeThread(state->id);
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if (FLAG_trace_thread_interrupter) {
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OS::Print("ThreadInterrupted failed to get registers for %p\n",
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reinterpret_cast<void*>(state->id));
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}
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return;
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}
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if (state->callback == NULL) {
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// No callback registered.
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ResumeThread(state->id);
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return;
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}
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state->callback(its, state->data);
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ResumeThread(state->id);
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}
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};
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void ThreadInterrupter::InterruptThreads(int64_t current_time) {
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for (intptr_t i = 0; i < threads_size_; i++) {
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ThreadState* state = threads_[i];
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ASSERT(state->id != Thread::kInvalidThreadId);
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if (FLAG_trace_thread_interrupter) {
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OS::Print("ThreadInterrupter suspending %p\n",
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reinterpret_cast<void*>(state->id));
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}
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ThreadInterrupterWin::Interrupt(state);
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if (FLAG_trace_thread_interrupter) {
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OS::Print("ThreadInterrupter resuming %p\n",
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reinterpret_cast<void*>(state->id));
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}
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}
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}
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void ThreadInterrupter::InstallSignalHandler() {
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// Nothing to do on Windows.
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}
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} // namespace dart
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#endif // defined(TARGET_OS_WINDOWS)
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