602497d672
added new command "process trace save -d <directory>". -it saves a JSON file as <directory>/trace.json, with the main properties of the trace session. -it saves binary Intel-pt trace as <directory>/thread_id.trace; each file saves each thread. -it saves modules to the directory <directory>/modules . -it only works for live process and it only support Intel-pt right now. Example: ``` b main run process trace start n process trace save -d /tmp/mytrace ``` A file named trace.json and xxx.trace should be generated in /tmp/mytrace. To load the trace that was just saved: ``` trace load /tmp/mytrace thread trace dump instructions ``` You should see the instructions of the trace got printed. To run a test: ``` cd ~/llvm-sand/build/Release/fbcode-x86_64/toolchain ninja lldb-dotest ./bin/lldb-dotest -p TestTraceSave ``` Reviewed By: wallace Differential Revision: https://reviews.llvm.org/D107669
59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
//===-- TraceIntelPTSessionFileParser.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_PLUGINS_TRACE_INTEL_PT_TRACEINTELPTSESSIONFILEPARSER_H
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#define LLDB_SOURCE_PLUGINS_TRACE_INTEL_PT_TRACEINTELPTSESSIONFILEPARSER_H
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#include "../common/TraceSessionFileParser.h"
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#include "TraceIntelPT.h"
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#include "TraceIntelPTJSONStructs.h"
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namespace lldb_private {
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namespace trace_intel_pt {
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class TraceIntelPT;
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class TraceIntelPTSessionFileParser : public TraceSessionFileParser {
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public:
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/// See \a TraceSessionFileParser::TraceSessionFileParser for the description
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/// of these fields.
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TraceIntelPTSessionFileParser(Debugger &debugger,
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const llvm::json::Value &trace_session_file,
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llvm::StringRef session_file_dir)
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: TraceSessionFileParser(debugger, session_file_dir, GetSchema()),
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m_trace_session_file(trace_session_file) {}
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/// \return
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/// The JSON schema for the session data.
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static llvm::StringRef GetSchema();
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/// Parse the structured data trace session and create the corresponding \a
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/// Target objects. In case of an error, no targets are created.
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///
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/// \return
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/// A \a lldb::TraceSP instance with the trace session data. In case of
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/// errors, return a null pointer.
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llvm::Expected<lldb::TraceSP> Parse();
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lldb::TraceSP
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CreateTraceIntelPTInstance(const pt_cpu &cpu_info,
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std::vector<ParsedProcess> &parsed_processes);
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private:
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static pt_cpu ParsePTCPU(const JSONTraceIntelPTCPUInfo &cpu_info);
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const llvm::json::Value &m_trace_session_file;
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};
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} // namespace trace_intel_pt
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} // namespace lldb_private
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#endif // LLDB_SOURCE_PLUGINS_TRACE_INTEL_PT_TRACEINTELPTSESSIONFILEPARSER_H
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