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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/nacl_debug_exception_handler_win.h"
#include "base/bind.h"
#include "base/process_util.h"
#include "base/threading/platform_thread.h"
#include "base/win/scoped_handle.h"
#include "native_client/src/trusted/service_runtime/win/debug_exception_handler.h"
namespace {
class DebugExceptionHandler : public base::PlatformThread::Delegate {
public:
DebugExceptionHandler(base::ProcessHandle nacl_process,
const std::string& startup_info,
base::MessageLoopProxy* message_loop,
const base::Callback<void(bool)>& on_connected)
: nacl_process_(nacl_process),
startup_info_(startup_info),
message_loop_(message_loop),
on_connected_(on_connected) {
}
virtual void ThreadMain() OVERRIDE {
// In the Windows API, the set of processes being debugged is
// thread-local, so we have to attach to the process (using
// DebugActiveProcess()) on the same thread on which
// NaClDebugExceptionHandlerRun() receives debug events for the
// process.
bool attached = false;
int pid = GetProcessId(nacl_process_);
if (pid == 0) {
LOG(ERROR) << "Invalid process handle";
} else {
if (!DebugActiveProcess(pid)) {
LOG(ERROR) << "Failed to connect to the process";
} else {
attached = true;
}
}
message_loop_->PostTask(FROM_HERE, base::Bind(on_connected_, attached));
if (attached) {
NaClDebugExceptionHandlerRun(
nacl_process_,
reinterpret_cast<const void*>(startup_info_.data()),
startup_info_.size());
}
delete this;
}
private:
base::win::ScopedHandle nacl_process_;
std::string startup_info_;
base::MessageLoopProxy* message_loop_;
base::Callback<void(bool)> on_connected_;
DISALLOW_COPY_AND_ASSIGN(DebugExceptionHandler);
};
} // namespace
void NaClStartDebugExceptionHandlerThread(
base::ProcessHandle nacl_process,
const std::string& startup_info,
base::MessageLoopProxy* message_loop,
const base::Callback<void(bool)>& on_connected) {
// The new PlatformThread will take ownership of the
// DebugExceptionHandler object, which will delete itself on exit.
DebugExceptionHandler* handler = new DebugExceptionHandler(
nacl_process, startup_info, message_loop, on_connected);
if (!base::PlatformThread::CreateNonJoinable(0, handler)) {
on_connected.Run(false);
delete handler;
}
}
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