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// Copyright Fedor Indutny and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef SRC_DEBUG_AGENT_H_
#define SRC_DEBUG_AGENT_H_
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#include "util.h"
#include "util-inl.h"
#include "uv.h"
#include "v8.h"
#include "v8-debug.h"
#include <string.h>
// Forward declaration to break recursive dependency chain with src/env.h.
namespace node {
class Environment;
} // namespace node
namespace node {
namespace debugger {
class AgentMessage {
public:
AgentMessage(uint16_t* val, int length) : length_(length) {
if (val == nullptr) {
data_ = val;
} else {
data_ = new uint16_t[length];
memcpy(data_, val, length * sizeof(*data_));
}
}
~AgentMessage() {
delete[] data_;
data_ = nullptr;
}
inline const uint16_t* data() const { return data_; }
inline int length() const { return length_; }
ListNode<AgentMessage> member;
private:
uint16_t* data_;
int length_;
};
class Agent {
public:
explicit Agent(node::Environment* env);
~Agent();
typedef void (*DispatchHandler)(node::Environment* env);
// Start the debugger agent thread
bool Start(int port, bool wait);
// Listen for debug events
void Enable();
// Stop the debugger agent
void Stop();
inline void set_dispatch_handler(DispatchHandler handler) {
dispatch_handler_ = handler;
}
inline node::Environment* parent_env() const { return parent_env_; }
inline node::Environment* child_env() const { return child_env_; }
protected:
void InitAdaptor(Environment* env);
// Worker body
void WorkerRun();
static void ThreadCb(Agent* agent);
static void ParentSignalCb(uv_async_t* signal);
static void ChildSignalCb(uv_async_t* signal);
static void MessageHandler(const v8::Debug::Message& message);
// V8 API
static Agent* Unwrap(const v8::FunctionCallbackInfo<v8::Value>& args);
static void NotifyListen(const v8::FunctionCallbackInfo<v8::Value>& args);
static void NotifyWait(const v8::FunctionCallbackInfo<v8::Value>& args);
static void SendCommand(const v8::FunctionCallbackInfo<v8::Value>& args);
void EnqueueMessage(AgentMessage* message);
enum State {
kNone,
kRunning
};
State state_;
int port_;
bool wait_;
uv_sem_t start_sem_;
uv_mutex_t message_mutex_;
uv_async_t child_signal_;
uv_thread_t thread_;
node::Environment* parent_env_;
node::Environment* child_env_;
uv_loop_t child_loop_;
v8::Persistent<v8::Object> api_;
ListHead<AgentMessage, &AgentMessage::member> messages_;
DispatchHandler dispatch_handler_;
};
} // namespace debugger
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_DEBUG_AGENT_H_
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