blob: 70a5e8c93f877bc049eef271a4c32bae48bdf558 [file] [log] [blame]
// 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_WINDOWS)
#include "vm/flags.h"
#include "vm/os.h"
#include "vm/thread_interrupter.h"
namespace dart {
DECLARE_FLAG(bool, thread_interrupter);
DECLARE_FLAG(bool, trace_thread_interrupter);
#define kThreadError -1
class ThreadInterrupterWin : public AllStatic {
public:
static bool GrabRegisters(HANDLE handle, InterruptedThreadState* state) {
CONTEXT context;
memset(&context, 0, sizeof(context));
#if defined(HOST_ARCH_IA32)
// On IA32, CONTEXT_CONTROL includes Eip, Ebp, and Esp.
context.ContextFlags = CONTEXT_CONTROL;
#elif defined(HOST_ARCH_X64)
// On X64, CONTEXT_CONTROL includes Rip and Rsp. Rbp is classified
// as an "integer" register.
context.ContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
#else
#error Unsupported architecture.
#endif
if (GetThreadContext(handle, &context) != 0) {
#if defined(HOST_ARCH_IA32)
state->pc = static_cast<uintptr_t>(context.Eip);
state->fp = static_cast<uintptr_t>(context.Ebp);
state->csp = static_cast<uintptr_t>(context.Esp);
state->dsp = static_cast<uintptr_t>(context.Esp);
#elif defined(HOST_ARCH_X64)
state->pc = static_cast<uintptr_t>(context.Rip);
state->fp = static_cast<uintptr_t>(context.Rbp);
state->csp = static_cast<uintptr_t>(context.Rsp);
state->dsp = static_cast<uintptr_t>(context.Rsp);
#else
#error Unsupported architecture.
#endif
return true;
}
return false;
}
static void Interrupt(Thread* thread) {
ASSERT(!OSThread::Compare(GetCurrentThreadId(), thread->id()));
HANDLE handle = OpenThread(THREAD_GET_CONTEXT |
THREAD_QUERY_INFORMATION |
THREAD_SUSPEND_RESUME,
false,
thread->id());
ASSERT(handle != NULL);
DWORD result = SuspendThread(handle);
if (result == kThreadError) {
if (FLAG_trace_thread_interrupter) {
OS::Print("ThreadInterrupter failed to suspend thread %p\n",
reinterpret_cast<void*>(thread->id()));
}
CloseHandle(handle);
return;
}
InterruptedThreadState its;
its.tid = thread->id();
if (!GrabRegisters(handle, &its)) {
// Failed to get thread registers.
ResumeThread(handle);
if (FLAG_trace_thread_interrupter) {
OS::Print("ThreadInterrupter failed to get registers for %p\n",
reinterpret_cast<void*>(thread->id()));
}
CloseHandle(handle);
return;
}
ThreadInterruptCallback callback = NULL;
void* callback_data = NULL;
if (thread->IsThreadInterrupterEnabled(&callback, &callback_data)) {
callback(its, callback_data);
}
ResumeThread(handle);
CloseHandle(handle);
}
};
void ThreadInterrupter::InterruptThread(Thread* thread) {
if (FLAG_trace_thread_interrupter) {
OS::Print("ThreadInterrupter suspending %p\n",
reinterpret_cast<void*>(thread->id()));
}
ThreadInterrupterWin::Interrupt(thread);
if (FLAG_trace_thread_interrupter) {
OS::Print("ThreadInterrupter resuming %p\n",
reinterpret_cast<void*>(thread->id()));
}
}
void ThreadInterrupter::InstallSignalHandler() {
// Nothing to do on Windows.
}
void ThreadInterrupter::RemoveSignalHandler() {
// Nothing to do on Windows.
}
} // namespace dart
#endif // defined(TARGET_OS_WINDOWS)