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0b69756110
This implements the interactive trace start and stop methods. This diff ended up being much larger than I anticipated because, by doing it, I found that I had implemented in the beginning many things in a non optimal way. In any case, the code is much better now. There's a lot of boilerplate code due to the gdb-remote protocol, but the main changes are: - New tracing packets: jLLDBTraceStop, jLLDBTraceStart, jLLDBTraceGetBinaryData. The gdb-remote packet definitions are quite comprehensive. - Implementation of the "process trace start|stop" and "thread trace start|stop" commands. - Implementaiton of an API in Trace.h to interact with live traces. - Created an IntelPTDecoder for live threads, that use the debugger's stop id as checkpoint for its internal cache. - Added a functionality to stop the process in case "process tracing" is enabled and a new thread can't traced. - Added tests I have some ideas to unify the code paths for post mortem and live threads, but I'll do that in another diff. Differential Revision: https://reviews.llvm.org/D91679
52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
//===-- CommandObjectTrace.h ------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLDB_SOURCE_COMMANDS_COMMANDOBJECTTRACE_H
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#define LLDB_SOURCE_COMMANDS_COMMANDOBJECTTRACE_H
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#include "CommandObjectThreadUtil.h"
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namespace lldb_private {
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class CommandObjectTrace : public CommandObjectMultiword {
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public:
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CommandObjectTrace(CommandInterpreter &interpreter);
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~CommandObjectTrace() override;
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};
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/// This class works by delegating the logic to the actual trace plug-in that
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/// can support the current process.
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class CommandObjectTraceProxy : public CommandObjectProxy {
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public:
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CommandObjectTraceProxy(bool live_debug_session_only,
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CommandInterpreter &interpreter, const char *name,
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const char *help = nullptr,
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const char *syntax = nullptr, uint32_t flags = 0)
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: CommandObjectProxy(interpreter, name, help, syntax, flags),
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m_live_debug_session_only(live_debug_session_only) {}
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protected:
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virtual lldb::CommandObjectSP GetDelegateCommand(Trace &trace) = 0;
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llvm::Expected<lldb::CommandObjectSP> DoGetProxyCommandObject();
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CommandObject *GetProxyCommandObject() override;
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private:
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llvm::StringRef GetUnsupportedError() override { return m_delegate_error; }
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bool m_live_debug_session_only;
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lldb::CommandObjectSP m_delegate_sp;
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std::string m_delegate_error;
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};
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} // namespace lldb_private
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#endif // LLDB_SOURCE_COMMANDS_COMMANDOBJECTTRACE_H
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