Siva Annamalai
9e19d236ca
fields in a thread (i.e fields that are not Dart VM related) - Split the Thread structure to be a pure Dart per thread structure and add a pointer to os_thread which points to the OSThread structure - Change Schedule/UnSchedule to set the Dart Thread structure as the TLS of the thread when it is inside the Dart world and reset the TLS back to the OSThread strcuture when is exits the Dart World. - Moved the stack_base and few stack size related functions to OSThread from Isolate R=johnmccutchan@google.com, zra@google.com Review URL: https://codereview.chromium.org/1439483003 .
122 lines
3.7 KiB
C++
122 lines
3.7 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/flags.h"
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#include "vm/os.h"
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#include "vm/profiler.h"
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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(HANDLE handle, InterruptedThreadState* state) {
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CONTEXT context;
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memset(&context, 0, sizeof(context));
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#if defined(HOST_ARCH_IA32)
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// On IA32, CONTEXT_CONTROL includes Eip, Ebp, and Esp.
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context.ContextFlags = CONTEXT_CONTROL;
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#elif defined(HOST_ARCH_X64)
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// On X64, CONTEXT_CONTROL includes Rip and Rsp. Rbp is classified
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// as an "integer" register.
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context.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
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#else
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#error Unsupported architecture.
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#endif
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if (GetThreadContext(handle, &context) != 0) {
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#if defined(HOST_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->csp = static_cast<uintptr_t>(context.Esp);
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state->dsp = static_cast<uintptr_t>(context.Esp);
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#elif defined(HOST_ARCH_X64)
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state->pc = static_cast<uintptr_t>(context.Rip);
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state->fp = static_cast<uintptr_t>(context.Rbp);
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state->csp = static_cast<uintptr_t>(context.Rsp);
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state->dsp = static_cast<uintptr_t>(context.Rsp);
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#else
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#error Unsupported architecture.
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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(OSThread* os_thread) {
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ASSERT(!OSThread::Compare(GetCurrentThreadId(), os_thread->id()));
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HANDLE handle = OpenThread(THREAD_GET_CONTEXT |
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THREAD_QUERY_INFORMATION |
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THREAD_SUSPEND_RESUME,
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false,
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os_thread->id());
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ASSERT(handle != NULL);
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DWORD result = SuspendThread(handle);
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if (result == kThreadError) {
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if (FLAG_trace_thread_interrupter) {
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OS::Print("ThreadInterrupter failed to suspend thread %p\n",
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reinterpret_cast<void*>(os_thread->id()));
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}
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CloseHandle(handle);
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return;
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}
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InterruptedThreadState its;
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if (!GrabRegisters(handle, &its)) {
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// Failed to get thread registers.
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ResumeThread(handle);
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if (FLAG_trace_thread_interrupter) {
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OS::Print("ThreadInterrupter failed to get registers for %p\n",
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reinterpret_cast<void*>(os_thread->id()));
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}
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CloseHandle(handle);
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return;
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}
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// Currently we sample only threads that are associated
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// with an isolate. It is safe to call 'os_thread->thread()'
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// here as the thread which is being queried is suspended.
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Thread* thread = os_thread->thread();
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if (thread != NULL) {
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Profiler::SampleThread(thread, its);
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}
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ResumeThread(handle);
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CloseHandle(handle);
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}
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};
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void ThreadInterrupter::InterruptThread(OSThread* thread) {
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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*>(thread->id()));
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}
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ThreadInterrupterWin::Interrupt(thread);
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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*>(thread->id()));
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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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void ThreadInterrupter::RemoveSignalHandler() {
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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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