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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_TARGET_H_
#define V8_DEBUG_WASM_GDB_SERVER_TARGET_H_
#include <atomic>
#include "src/base/macros.h"
namespace v8 {
namespace internal {
namespace wasm {
namespace gdb_server {
class GdbServer;
class Session;
// Class Target represents a debugging target. It contains the logic to decode
// incoming GDB-remote packets, execute them forwarding the debugger commands
// and queries to the Wasm engine, and send back GDB-remote packets.
class Target {
public:
// Contruct a Target object.
explicit Target(GdbServer* gdb_server);
// This function spin on a debugging session, until it closes.
void Run(Session* ses);
void Terminate();
bool IsTerminated() const { return status_ == Status::Terminated; }
private:
// Blocks waiting for one of these two events to occur:
// - A network packet arrives from the debugger, or the debugger connection is
// closed;
// - The debuggee suspends execution because of a trap or breakpoint.
void WaitForDebugEvent();
// Processes GDB-remote packets that arrive from the debugger.
// This method should be called when the debuggee has suspended its execution.
void ProcessCommands();
enum class Status { Running, Terminated };
std::atomic<Status> status_;
Session* session_; // Session object not owned by the Target.
DISALLOW_COPY_AND_ASSIGN(Target);
};
} // namespace gdb_server
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_DEBUG_WASM_GDB_SERVER_TARGET_H_
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