clayborg updated this revision to Diff 285177.
clayborg added a comment.
Fix inline comment issues from vsk.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D85705/new/
https://reviews.llvm.org/D85705
Files:
lldb/include/lldb/Core/PluginManager.h
lldb/include/lldb/Target/Trace.h
lldb/include/lldb/lldb-forward.h
lldb/include/lldb/lldb-private-interfaces.h
lldb/source/Commands/CMakeLists.txt
lldb/source/Commands/CommandObjectTrace.cpp
lldb/source/Commands/CommandObjectTrace.h
lldb/source/Commands/Options.td
lldb/source/Core/PluginManager.cpp
lldb/source/Interpreter/CommandInterpreter.cpp
lldb/source/Plugins/CMakeLists.txt
lldb/source/Plugins/Trace/CMakeLists.txt
lldb/source/Plugins/Trace/intel-pt/CMakeLists.txt
lldb/source/Plugins/Trace/intel-pt/TraceIntelPT.cpp
lldb/source/Plugins/Trace/intel-pt/TraceIntelPT.h
lldb/source/Target/CMakeLists.txt
lldb/source/Target/Trace.cpp
lldb/source/Utility/StructuredData.cpp
Index: lldb/source/Utility/StructuredData.cpp
===================================================================
--- lldb/source/Utility/StructuredData.cpp
+++ lldb/source/Utility/StructuredData.cpp
@@ -42,7 +42,12 @@
buffer_or_error.getError().message());
return return_sp;
}
- return ParseJSON(buffer_or_error.get()->getBuffer().str());
+ llvm::Expected<json::Value> value =
+ json::parse(buffer_or_error.get()->getBuffer().str());
+ if (value)
+ return ParseJSONValue(*value);
+ error.SetErrorString(toString(value.takeError()));
+ return StructuredData::ObjectSP();
}
static StructuredData::ObjectSP ParseJSONValue(json::Value &value) {
Index: lldb/source/Target/Trace.cpp
===================================================================
--- /dev/null
+++ lldb/source/Target/Trace.cpp
@@ -0,0 +1,32 @@
+//===-- Trace.cpp ---------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Target/Trace.h"
+#include "lldb/Core/PluginManager.h"
+#include "llvm/Support/Format.h"
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace llvm;
+
+llvm::Expected<lldb::TraceSP>
+Trace::FindPlugin(StructuredData::Dictionary info) {
+ StringRef name;
+ if (!info.GetValueForKeyAsString("name", name))
+ return createStringError(std::errc::invalid_argument,
+ "structured data is missing the \"name\" field "
+ "that identifies the trace plug-in");
+ ConstString plugin_name(name);
+ auto create_callback = PluginManager::GetTraceCreateCallback(plugin_name);
+ if (create_callback)
+ return create_callback(std::move(info));
+ return createStringError(
+ std::errc::invalid_argument,
+ "no trace plug-in matches the specified name: \"%s\"",
+ name.str().c_str());
+}
Index: lldb/source/Target/CMakeLists.txt
===================================================================
--- lldb/source/Target/CMakeLists.txt
+++ lldb/source/Target/CMakeLists.txt
@@ -65,6 +65,7 @@
ThreadPlanTracer.cpp
ThreadPlanStack.cpp
ThreadSpec.cpp
+ Trace.cpp
UnixSignals.cpp
UnwindAssembly.cpp
UnwindLLDB.cpp
Index: lldb/source/Plugins/Trace/intel-pt/TraceIntelPT.h
===================================================================
--- /dev/null
+++ lldb/source/Plugins/Trace/intel-pt/TraceIntelPT.h
@@ -0,0 +1,48 @@
+//===-- TraceIntelPT.h ------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef liblldb_TraceIntelPT_h_
+#define liblldb_TraceIntelPT_h_
+
+// Other libraries and framework includes
+#include <llvm/ADT/Optional.h>
+
+// Project includes
+#include "lldb/Target/Trace.h"
+#include "lldb/lldb-private.h"
+
+class TraceIntelPT : public lldb_private::Trace {
+public:
+ void Dump(lldb_private::Stream *s) const override;
+
+ //------------------------------------------------------------------
+ // Static Functions
+ //------------------------------------------------------------------
+
+ static void Initialize();
+
+ static void Terminate();
+
+ static lldb::TraceSP
+ CreateInstance(lldb_private::StructuredData::Dictionary info);
+
+ static lldb_private::ConstString GetPluginNameStatic();
+
+ //------------------------------------------------------------------
+ // PluginInterface protocol
+ //------------------------------------------------------------------
+
+ lldb_private::ConstString GetPluginName() override;
+
+ uint32_t GetPluginVersion() override;
+
+protected:
+ TraceIntelPT(lldb_private::StructuredData::Dictionary info) : Trace(info) {}
+};
+
+#endif // liblldb_TraceIntelPT_h_
Index: lldb/source/Plugins/Trace/intel-pt/TraceIntelPT.cpp
===================================================================
--- /dev/null
+++ lldb/source/Plugins/Trace/intel-pt/TraceIntelPT.cpp
@@ -0,0 +1,47 @@
+//===-- TraceIntelPT.cpp
+//---------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+#include "TraceIntelPT.h"
+#include "lldb/Core/PluginManager.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+LLDB_PLUGIN_DEFINE_ADV(TraceIntelPT, TraceIntelPT)
+
+void TraceIntelPT::Initialize() {
+ PluginManager::RegisterPlugin(GetPluginNameStatic(), "Intel Processor Trace",
+ CreateInstance);
+}
+
+void TraceIntelPT::Terminate() {
+ PluginManager::UnregisterPlugin(CreateInstance);
+}
+
+ConstString TraceIntelPT::GetPluginNameStatic() {
+ static ConstString g_name("intel-pt");
+ return g_name;
+}
+
+//------------------------------------------------------------------
+// PluginInterface protocol
+//------------------------------------------------------------------
+
+ConstString TraceIntelPT::GetPluginName() { return GetPluginNameStatic(); }
+
+uint32_t TraceIntelPT::GetPluginVersion() { return 1; }
+
+void TraceIntelPT::Dump(lldb_private::Stream *s) const {}
+
+lldb::TraceSP TraceIntelPT::CreateInstance(StructuredData::Dictionary info) {
+ return lldb::TraceSP(new TraceIntelPT(info));
+}
Index: lldb/source/Plugins/Trace/intel-pt/CMakeLists.txt
===================================================================
--- /dev/null
+++ lldb/source/Plugins/Trace/intel-pt/CMakeLists.txt
@@ -0,0 +1,10 @@
+add_lldb_library(lldbPluginTraceIntelPT PLUGIN
+ TraceIntelPT.cpp
+
+ LINK_LIBS
+ lldbCore
+ lldbSymbol
+ lldbTarget
+ LINK_COMPONENTS
+ Support
+ )
Index: lldb/source/Plugins/Trace/CMakeLists.txt
===================================================================
--- /dev/null
+++ lldb/source/Plugins/Trace/CMakeLists.txt
@@ -0,0 +1 @@
+add_subdirectory(intel-pt)
Index: lldb/source/Plugins/CMakeLists.txt
===================================================================
--- lldb/source/Plugins/CMakeLists.txt
+++ lldb/source/Plugins/CMakeLists.txt
@@ -19,6 +19,7 @@
add_subdirectory(SymbolFile)
add_subdirectory(SystemRuntime)
add_subdirectory(SymbolVendor)
+add_subdirectory(Trace)
add_subdirectory(TypeSystem)
add_subdirectory(UnwindAssembly)
Index: lldb/source/Interpreter/CommandInterpreter.cpp
===================================================================
--- lldb/source/Interpreter/CommandInterpreter.cpp
+++ lldb/source/Interpreter/CommandInterpreter.cpp
@@ -38,6 +38,7 @@
#include "Commands/CommandObjectStats.h"
#include "Commands/CommandObjectTarget.h"
#include "Commands/CommandObjectThread.h"
+#include "Commands/CommandObjectTrace.h"
#include "Commands/CommandObjectType.h"
#include "Commands/CommandObjectVersion.h"
#include "Commands/CommandObjectWatchpoint.h"
@@ -511,6 +512,7 @@
REGISTER_COMMAND_OBJECT("statistics", CommandObjectStats);
REGISTER_COMMAND_OBJECT("target", CommandObjectMultiwordTarget);
REGISTER_COMMAND_OBJECT("thread", CommandObjectMultiwordThread);
+ REGISTER_COMMAND_OBJECT("trace", CommandObjectTrace);
REGISTER_COMMAND_OBJECT("type", CommandObjectType);
REGISTER_COMMAND_OBJECT("version", CommandObjectVersion);
REGISTER_COMMAND_OBJECT("watchpoint", CommandObjectMultiwordWatchpoint);
Index: lldb/source/Core/PluginManager.cpp
===================================================================
--- lldb/source/Core/PluginManager.cpp
+++ lldb/source/Core/PluginManager.cpp
@@ -1005,6 +1005,30 @@
return GetSymbolVendorInstances().GetCallbackAtIndex(idx);
}
+#pragma mark Trace
+
+typedef PluginInstance<TraceCreateInstance> TraceInstance;
+typedef PluginInstances<TraceInstance> TraceInstances;
+
+static TraceInstances &GetTraceInstances() {
+ static TraceInstances g_instances;
+ return g_instances;
+}
+
+bool PluginManager::RegisterPlugin(ConstString name, const char *description,
+ TraceCreateInstance create_callback) {
+ return GetTraceInstances().RegisterPlugin(name, description, create_callback);
+}
+
+bool PluginManager::UnregisterPlugin(TraceCreateInstance create_callback) {
+ return GetTraceInstances().UnregisterPlugin(create_callback);
+}
+
+TraceCreateInstance
+PluginManager::GetTraceCreateCallback(ConstString plugin_name) {
+ return GetTraceInstances().GetCallbackForName(plugin_name);
+}
+
#pragma mark UnwindAssembly
typedef PluginInstance<UnwindAssemblyCreateInstance> UnwindAssemblyInstance;
Index: lldb/source/Commands/Options.td
===================================================================
--- lldb/source/Commands/Options.td
+++ lldb/source/Commands/Options.td
@@ -1161,3 +1161,14 @@
def watchpoint_delete_force : Option<"force", "f">, Group<1>,
Desc<"Delete all watchpoints without querying for confirmation.">;
}
+
+let Command = "trace load" in {
+ def trace_load_verbose : Option<"verbose", "v">, Group<1>,
+ Desc<"Show verbose trace load logging for debugging the plug-in "
+ "implementation.">;
+}
+
+let Command = "trace dump" in {
+ def trace_dump_verbose : Option<"verbose", "v">, Group<1>,
+ Desc<"Show verbose trace information.">;
+}
Index: lldb/source/Commands/CommandObjectTrace.h
===================================================================
--- /dev/null
+++ lldb/source/Commands/CommandObjectTrace.h
@@ -0,0 +1,25 @@
+//===-- CommandObjectTrace.h ----------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_COMMANDS_COMMANDOBJECTTRACE_H
+#define LLDB_SOURCE_COMMANDS_COMMANDOBJECTTRACE_H
+
+#include "lldb/Interpreter/CommandObjectMultiword.h"
+
+namespace lldb_private {
+
+class CommandObjectTrace : public CommandObjectMultiword {
+public:
+ CommandObjectTrace(CommandInterpreter &interpreter);
+
+ ~CommandObjectTrace() override;
+};
+
+} // namespace lldb_private
+
+#endif // LLDB_SOURCE_COMMANDS_COMMANDOBJECTTRACE_H
Index: lldb/source/Commands/CommandObjectTrace.cpp
===================================================================
--- /dev/null
+++ lldb/source/Commands/CommandObjectTrace.cpp
@@ -0,0 +1,209 @@
+//===-- CommandObjectTrace.cpp --------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "CommandObjectTrace.h"
+
+#include "lldb/Core/Debugger.h"
+#include "lldb/Host/OptionParser.h"
+#include "lldb/Interpreter/CommandInterpreter.h"
+#include "lldb/Interpreter/CommandObject.h"
+#include "lldb/Interpreter/CommandReturnObject.h"
+#include "lldb/Interpreter/OptionArgParser.h"
+#include "lldb/Interpreter/OptionGroupFormat.h"
+#include "lldb/Interpreter/OptionValueBoolean.h"
+#include "lldb/Interpreter/OptionValueLanguage.h"
+#include "lldb/Interpreter/OptionValueString.h"
+#include "lldb/Interpreter/Options.h"
+#include "lldb/Target/Trace.h"
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace llvm;
+
+// CommandObjectTraceLoad
+#define LLDB_OPTIONS_trace_load
+#include "CommandOptions.inc"
+
+#pragma mark CommandObjectTraceLoad
+
+class CommandObjectTraceLoad : public CommandObjectParsed {
+public:
+ class CommandOptions : public Options {
+ public:
+ CommandOptions() : Options() { OptionParsingStarting(nullptr); }
+
+ ~CommandOptions() override = default;
+
+ Status SetOptionValue(uint32_t option_idx, StringRef option_arg,
+ ExecutionContext *execution_context) override {
+ Status error;
+ const int short_option = m_getopt_table[option_idx].val;
+
+ switch (short_option) {
+ case 'v': {
+ bool success = false;
+ bool value = OptionArgParser::ToBoolean(option_arg, false, &success);
+ if (success)
+ m_verbose = value;
+ else
+ error.SetErrorStringWithFormat("invalid boolean option: \"%s\"",
+ option_arg.str().c_str());
+ break;
+ }
+ default:
+ llvm_unreachable("Unimplemented option");
+ }
+ return error;
+ }
+
+ void OptionParsingStarting(ExecutionContext *execution_context) override {
+ m_verbose = false;
+ }
+
+ ArrayRef<OptionDefinition> GetDefinitions() override {
+ return makeArrayRef(g_trace_load_options);
+ }
+
+ bool m_verbose; // Enable verbose logging for debugging purposes.
+ };
+
+ CommandObjectTraceLoad(CommandInterpreter &interpreter)
+ : CommandObjectParsed(interpreter, "trace load",
+ "Load processor trace data from a JSON file.",
+ "trace load"),
+ m_options() {}
+
+ ~CommandObjectTraceLoad() override = default;
+
+ Options *GetOptions() override { return &m_options; }
+
+protected:
+ bool DoExecute(Args &command, CommandReturnObject &result) override {
+ Status error;
+ if (command.size() != 1) {
+ error.SetErrorString("a single path to a JSON file containing trace "
+ "information is required");
+ } else {
+ FileSpec json_file(command[0].ref());
+ auto data_sp = StructuredData::ParseJSONFromFile(json_file, error);
+ if (error.Success()) {
+ StructuredData::Dictionary *dict = data_sp->GetAsDictionary();
+ if (dict) {
+ if (Expected<lldb::TraceSP> traceOrErr = Trace::FindPlugin(*dict)) {
+ // TODO: fill in the loading code here that uses the trace plugin
+ // below that is in "trace_sp".
+ lldb::TraceSP trace_sp = traceOrErr.get();
+ result.AppendMessage("got trace plugin!");
+ } else {
+ result.AppendMessage("didn't get trace plugin...");
+ error.SetErrorString(llvm::toString(traceOrErr.takeError()));
+ }
+ } else {
+ error.SetErrorString("JSON data must be a dictionary");
+ }
+ }
+ }
+ if (error.Success()) {
+ result.SetStatus(eReturnStatusSuccessFinishResult);
+ } else {
+ result.AppendErrorWithFormat("%s\n", error.AsCString());
+ result.SetStatus(eReturnStatusFailed);
+ }
+ return result.Succeeded();
+ }
+
+ CommandOptions m_options;
+};
+
+// CommandObjectTraceDump
+#define LLDB_OPTIONS_trace_dump
+#include "CommandOptions.inc"
+
+#pragma mark CommandObjectTraceDump
+
+class CommandObjectTraceDump : public CommandObjectParsed {
+public:
+ class CommandOptions : public Options {
+ public:
+ CommandOptions() : Options() { OptionParsingStarting(nullptr); }
+
+ ~CommandOptions() override = default;
+
+ Status SetOptionValue(uint32_t option_idx, llvm::StringRef option_arg,
+ ExecutionContext *execution_context) override {
+ Status error;
+ const int short_option = m_getopt_table[option_idx].val;
+
+ switch (short_option) {
+ case 'v': {
+ bool success = false;
+ bool value = OptionArgParser::ToBoolean(option_arg, false, &success);
+ if (success)
+ m_verbose = value;
+ else
+ error.SetErrorStringWithFormat("invalid boolean option: \"%s\"",
+ option_arg.str().c_str());
+ break;
+ }
+ default:
+ llvm_unreachable("Unimplemented option");
+ }
+ return error;
+ }
+
+ void OptionParsingStarting(ExecutionContext *execution_context) override {
+ m_verbose = false;
+ }
+
+ llvm::ArrayRef<OptionDefinition> GetDefinitions() override {
+ return llvm::makeArrayRef(g_trace_dump_options);
+ }
+
+ bool m_verbose; // Enable verbose logging for debugging purposes.
+ };
+
+ CommandObjectTraceDump(CommandInterpreter &interpreter)
+ : CommandObjectParsed(interpreter, "trace dump",
+ "Dump the loaded processor trace data.",
+ "trace dump"),
+ m_options() {}
+
+ ~CommandObjectTraceDump() override = default;
+
+ Options *GetOptions() override { return &m_options; }
+
+protected:
+ bool DoExecute(Args &command, CommandReturnObject &result) override {
+ Status error;
+ // TODO: fill in the dumping code here!
+ if (error.Success()) {
+ result.SetStatus(eReturnStatusSuccessFinishResult);
+ } else {
+ result.AppendErrorWithFormat("%s\n", error.AsCString());
+ result.SetStatus(eReturnStatusFailed);
+ }
+ return result.Succeeded();
+ }
+
+ CommandOptions m_options;
+};
+
+// CommandObjectTrace
+
+CommandObjectTrace::CommandObjectTrace(CommandInterpreter &interpreter)
+ : CommandObjectMultiword(interpreter, "trace",
+ "Commands for loading and using processor "
+ "trace information.",
+ "trace [<sub-command-options>]") {
+ LoadSubCommand("load",
+ CommandObjectSP(new CommandObjectTraceLoad(interpreter)));
+ LoadSubCommand("dump",
+ CommandObjectSP(new CommandObjectTraceDump(interpreter)));
+}
+
+CommandObjectTrace::~CommandObjectTrace() = default;
Index: lldb/source/Commands/CMakeLists.txt
===================================================================
--- lldb/source/Commands/CMakeLists.txt
+++ lldb/source/Commands/CMakeLists.txt
@@ -29,6 +29,7 @@
CommandObjectStats.cpp
CommandObjectTarget.cpp
CommandObjectThread.cpp
+ CommandObjectTrace.cpp
CommandObjectType.cpp
CommandObjectVersion.cpp
CommandObjectWatchpoint.cpp
Index: lldb/include/lldb/lldb-private-interfaces.h
===================================================================
--- lldb/include/lldb/lldb-private-interfaces.h
+++ lldb/include/lldb/lldb-private-interfaces.h
@@ -11,6 +11,7 @@
#if defined(__cplusplus)
+#include "lldb/Utility/StructuredData.h"
#include "lldb/lldb-enumerations.h"
#include "lldb/lldb-forward.h"
#include "lldb/lldb-private-enumerations.h"
@@ -104,6 +105,7 @@
const char *repl_options);
typedef int (*ComparisonFunction)(const void *, const void *);
typedef void (*DebuggerInitializeCallback)(Debugger &debugger);
+typedef lldb::TraceSP (*TraceCreateInstance)(StructuredData::Dictionary info);
} // namespace lldb_private
Index: lldb/include/lldb/lldb-forward.h
===================================================================
--- lldb/include/lldb/lldb-forward.h
+++ lldb/include/lldb/lldb-forward.h
@@ -226,6 +226,7 @@
class ThreadPlanStepThrough;
class ThreadPlanTracer;
class ThreadSpec;
+class Trace;
class TraceOptions;
class Type;
class TypeAndOrName;
@@ -432,6 +433,7 @@
typedef std::shared_ptr<lldb_private::ThreadPlan> ThreadPlanSP;
typedef std::weak_ptr<lldb_private::ThreadPlan> ThreadPlanWP;
typedef std::shared_ptr<lldb_private::ThreadPlanTracer> ThreadPlanTracerSP;
+typedef std::shared_ptr<lldb_private::Trace> TraceSP;
typedef std::shared_ptr<lldb_private::TraceOptions> TraceOptionsSP;
typedef std::shared_ptr<lldb_private::Type> TypeSP;
typedef std::weak_ptr<lldb_private::Type> TypeWP;
Index: lldb/include/lldb/Target/Trace.h
===================================================================
--- /dev/null
+++ lldb/include/lldb/Target/Trace.h
@@ -0,0 +1,97 @@
+//===-- Trace.h -------------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_TARGET_TRACE_H
+#define LLDB_TARGET_TRACE_H
+
+#include "lldb/Core/PluginInterface.h"
+#include "lldb/Utility/Status.h"
+#include "lldb/Utility/StructuredData.h"
+#include "lldb/lldb-private.h"
+#include "llvm/Support/Error.h"
+
+namespace lldb_private {
+
+class StructuredData;
+
+/// \class Trace Trace.h "lldb/Target/Trace.h"
+/// A plug-in interface definition class for trace information.
+///
+/// Trace plug-ins allow processor trace information to be loaded into LLDB so
+/// that the data can be dumped, used for reverse and forward stepping to allow
+/// introspection into the reason your process crashed or found its way to its
+/// current state.
+///
+/// Trace information can be loaded into a target without a process to allow
+/// introspection of the trace information during post mortem analysis, such as
+/// when loading core files.
+///
+/// Processor trace information can also be fetched through the process
+/// interfaces during a live debug session if your process supports gathering
+/// this information.
+class Trace : public PluginInterface {
+public:
+ ~Trace() override = default;
+
+ /// Dump the trace data that this plug-in has access to.
+ ///
+ /// This function will dump all of the trace data for all threads in a user
+ /// readable format. Options for dumping can be added as this API is iterated
+ /// on.
+ ///
+ /// \param[in] s
+ /// A stream object to dump the information to.
+ virtual void Dump(Stream *s) const = 0;
+
+ /// Find a trace plug-in using structured data.
+ ///
+ /// When loading trace data from disk, the information for the trace data
+ /// can be contained in multiple files and require plug-in specific
+ /// information about the CPU. Using structured data like JSON provides an
+ /// easy way to specify all of the settings and information that we will need
+ /// to load trace data into LLDB. This structured data can include:
+ /// - The plug-in name (this allows a specific plug-in to be selected)
+ /// - Architecture or target triple
+ /// - one or more paths to the trace data file on disk
+ /// - core trace data
+ /// - thread events or related information
+ /// - shared library load information to use for this trace data that
+ /// allows a target to be created so the trace information can be
+ /// symbolicated so that the trace information can be displayed to the
+ /// user
+ /// - shared library path
+ /// - load address
+ /// - UUID
+ /// - information on how to fetch the shared library
+ /// - path to locally cached file on disk
+ /// - URL to download the file
+ /// - Any information needed to load the trace file
+ /// - CPU information
+ /// - Custom plug-in information needed to decode the trace information
+ /// correctly.
+ ///
+ ///
+ /// \param[in] info
+ /// Structured data in the form of a dictionary.
+ static llvm::Expected<lldb::TraceSP>
+ FindPlugin(StructuredData::Dictionary info);
+
+protected:
+ Trace(StructuredData::Dictionary info) : m_info(std::move(info)) {}
+
+private:
+ Trace(const Trace &) = delete;
+ const Trace &operator=(const Trace &) = delete;
+
+ // Structured data that holds all settings for this trace session.
+ StructuredData::Dictionary m_info;
+};
+
+} // namespace lldb_private
+
+#endif // LLDB_TARGET_TRACE_H
Index: lldb/include/lldb/Core/PluginManager.h
===================================================================
--- lldb/include/lldb/Core/PluginManager.h
+++ lldb/include/lldb/Core/PluginManager.h
@@ -330,6 +330,14 @@
static SymbolVendorCreateInstance
GetSymbolVendorCreateCallbackAtIndex(uint32_t idx);
+ // Trace
+ static bool RegisterPlugin(ConstString name, const char *description,
+ TraceCreateInstance create_callback);
+
+ static bool UnregisterPlugin(TraceCreateInstance create_callback);
+
+ static TraceCreateInstance GetTraceCreateCallback(ConstString plugin_name);
+
// UnwindAssembly
static bool RegisterPlugin(ConstString name, const char *description,
UnwindAssemblyCreateInstance create_callback);
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