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
60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
//===-- TraceIntelPTJSONStructs.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 "TraceIntelPTJSONStructs.h"
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#include "llvm/Support/JSON.h"
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#include <string>
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::trace_intel_pt;
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using namespace llvm;
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namespace llvm {
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namespace json {
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bool fromJSON(const Value &value, JSONTraceIntelPTSettings &plugin_settings,
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Path path) {
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ObjectMapper o(value, path);
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return o && o.map("cpuInfo", plugin_settings.cpuInfo) &&
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fromJSON(value, (JSONTracePluginSettings &)plugin_settings, path);
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}
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bool fromJSON(const json::Value &value, JSONTraceIntelPTCPUInfo &cpu_info,
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Path path) {
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ObjectMapper o(value, path);
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return o && o.map("vendor", cpu_info.vendor) &&
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o.map("family", cpu_info.family) && o.map("model", cpu_info.model) &&
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o.map("stepping", cpu_info.stepping);
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}
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Value toJSON(const JSONTraceIntelPTCPUInfo &cpu_info) {
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return Value(Object{{"family", cpu_info.family},
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{"model", cpu_info.model},
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{"stepping", cpu_info.stepping},
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{"vendor", cpu_info.vendor}});
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}
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llvm::json::Value toJSON(const JSONTraceIntelPTTrace &trace) {
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llvm::json::Object json_trace;
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json_trace["type"] = trace.type;
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json_trace["cpuInfo"] = toJSON(trace.cpuInfo);
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return std::move(json_trace);
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}
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llvm::json::Value toJSON(const JSONTraceIntelPTSession &session) {
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llvm::json::Object json_session;
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json_session["trace"] = toJSON(session.ipt_trace);
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json_session["processes"] = toJSON(session.session_base);
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return std::move(json_session);
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}
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} // namespace json
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} // namespace llvm
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