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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
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
//===-- ThreadPostMortemTrace.cpp -----------------------------------------===//
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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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#include "lldb/Target/ThreadPostMortemTrace.h"
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#include <memory>
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#include "Plugins/Process/Utility/RegisterContextHistory.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/RegisterContext.h"
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using namespace lldb;
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using namespace lldb_private;
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void ThreadPostMortemTrace::RefreshStateAfterStop() {}
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RegisterContextSP ThreadPostMortemTrace::GetRegisterContext() {
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if (!m_reg_context_sp)
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m_reg_context_sp = CreateRegisterContextForFrame(nullptr);
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return m_reg_context_sp;
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}
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RegisterContextSP
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ThreadPostMortemTrace::CreateRegisterContextForFrame(StackFrame *frame) {
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// Eventually this will calculate the register context based on the current
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// trace position.
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return std::make_shared<RegisterContextHistory>(
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*this, 0, GetProcess()->GetAddressByteSize(), LLDB_INVALID_ADDRESS);
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}
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bool ThreadPostMortemTrace::CalculateStopInfo() { return false; }
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const FileSpec &ThreadPostMortemTrace::GetTraceFile() const {
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return m_trace_file;
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}
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