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// Copyright 2020 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_DEBUG_WASM_GDB_SERVER_GDB_SERVER_THREAD_H_
#define V8_DEBUG_WASM_GDB_SERVER_GDB_SERVER_THREAD_H_
#include "src/base/platform/platform.h"
#include "src/base/platform/semaphore.h"
#include "src/debug/wasm/gdb-server/target.h"
#include "src/debug/wasm/gdb-server/transport.h"
namespace v8 {
namespace internal {
namespace wasm {
namespace gdb_server {
class GdbServer;
// class GdbServerThread spawns a thread where all communication with a debugger
// happens.
class GdbServerThread : public v8::base::Thread {
public:
explicit GdbServerThread(GdbServer* gdb_server);
GdbServerThread(const GdbServerThread&) = delete;
GdbServerThread& operator=(const GdbServerThread&) = delete;
// base::Thread
void Run() override;
// Starts the GDB-server thread and waits Run() method is called on the new
// thread and the initialization completes.
bool StartAndInitialize();
// Stops the GDB-server thread when the V8 process shuts down; gracefully
// closes any active debugging session.
void Stop();
Target& GetTarget() { return *target_; }
private:
void CleanupThread();
GdbServer* gdb_server_;
// Used to block the caller on StartAndInitialize() waiting for the new thread
// to have completed its initialization.
// (Note that Thread::StartSynchronously() wouldn't work in this case because
// it returns as soon as the new thread starts, but before Run() is called).
base::Semaphore start_semaphore_;
base::Mutex mutex_;
// Protected by {mutex_}:
std::unique_ptr<TransportBase> transport_;
std::unique_ptr<Target> target_;
};
} // namespace gdb_server
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_DEBUG_WASM_GDB_SERVER_GDB_SERVER_THREAD_H_
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