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//===-- TraceSessionFileParser.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 "TraceSessionFileParser.h"
#include "ThreadPostMortemTrace.h"
#include <sstream>
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Module.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
using namespace lldb;
using namespace lldb_private;
using namespace llvm;
void TraceSessionFileParser::NormalizePath(lldb_private::FileSpec &file_spec) {
if (file_spec.IsRelative())
file_spec.PrependPathComponent(m_session_file_dir);
}
Error TraceSessionFileParser::ParseModule(lldb::TargetSP &target_sp,
const JSONModule &module) {
FileSpec system_file_spec(module.system_path);
NormalizePath(system_file_spec);
FileSpec local_file_spec(module.file.hasValue() ? *module.file
: module.system_path);
NormalizePath(local_file_spec);
ModuleSpec module_spec;
module_spec.GetFileSpec() = local_file_spec;
module_spec.GetPlatformFileSpec() = system_file_spec;
if (module.uuid.hasValue())
module_spec.GetUUID().SetFromStringRef(*module.uuid);
Status error;
ModuleSP module_sp =
target_sp->GetOrCreateModule(module_spec, /*notify*/ false, &error);
if (error.Fail())
return error.ToError();
bool load_addr_changed = false;
module_sp->SetLoadAddress(*target_sp, module.load_address.value, false,
load_addr_changed);
return llvm::Error::success();
}
Error TraceSessionFileParser::CreateJSONError(json::Path::Root &root,
const json::Value &value) {
std::string err;
raw_string_ostream os(err);
root.printErrorContext(value, os);
return createStringError(
std::errc::invalid_argument, "%s\n\nContext:\n%s\n\nSchema:\n%s",
toString(root.getError()).c_str(), os.str().c_str(), m_schema.data());
}
std::string TraceSessionFileParser::BuildSchema(StringRef plugin_schema) {
std::ostringstream schema_builder;
schema_builder << "{\n \"trace\": ";
schema_builder << plugin_schema.data() << ",";
schema_builder << R"(
"processes": [
{
"pid": integer,
"triple": string, // llvm-triple
"threads": [
{
"tid": integer,
"traceFile": string
}
],
"modules": [
{
"systemPath": string, // original path of the module at runtime
"file"?: string, // copy of the file if not available at "systemPath"
"loadAddress": string, // string address in hex or decimal form
"uuid"?: string,
}
]
}
]
// Notes:
// All paths are either absolute or relative to the session file.
}
)";
return schema_builder.str();
}
ThreadPostMortemTraceSP
TraceSessionFileParser::ParseThread(ProcessSP &process_sp,
const JSONThread &thread) {
lldb::tid_t tid = static_cast<lldb::tid_t>(thread.tid);
FileSpec trace_file(thread.trace_file);
NormalizePath(trace_file);
ThreadPostMortemTraceSP thread_sp =
std::make_shared<ThreadPostMortemTrace>(*process_sp, tid, trace_file);
process_sp->GetThreadList().AddThread(thread_sp);
return thread_sp;
}
Expected<TraceSessionFileParser::ParsedProcess>
TraceSessionFileParser::ParseProcess(const JSONProcess &process) {
TargetSP target_sp;
Status error = m_debugger.GetTargetList().CreateTarget(
m_debugger, /*user_exe_path*/ StringRef(), process.triple,
eLoadDependentsNo,
/*platform_options*/ nullptr, target_sp);
if (!target_sp)
return error.ToError();
ParsedProcess parsed_process;
parsed_process.target_sp = target_sp;
ProcessSP process_sp = target_sp->CreateProcess(
/*listener*/ nullptr, "trace",
/*crash_file*/ nullptr,
/*can_connect*/ false);
process_sp->SetID(static_cast<lldb::pid_t>(process.pid));
for (const JSONThread &thread : process.threads)
parsed_process.threads.push_back(ParseThread(process_sp, thread));
for (const JSONModule &module : process.modules)
if (Error err = ParseModule(target_sp, module))
return std::move(err);
if (!process.threads.empty())
process_sp->GetThreadList().SetSelectedThreadByIndexID(0);
// We invoke DidAttach to create a correct stopped state for the process and
// its threads.
ArchSpec process_arch;
process_sp->DidAttach(process_arch);
return parsed_process;
}
Expected<std::vector<TraceSessionFileParser::ParsedProcess>>
TraceSessionFileParser::ParseCommonSessionFile(
const JSONTraceSessionBase &session) {
std::vector<ParsedProcess> parsed_processes;
auto onError = [&]() {
// Delete all targets that were created so far in case of failures
for (ParsedProcess &parsed_process : parsed_processes)
m_debugger.GetTargetList().DeleteTarget(parsed_process.target_sp);
};
for (const JSONProcess &process : session.processes) {
if (Expected<ParsedProcess> parsed_process = ParseProcess(process))
parsed_processes.push_back(std::move(*parsed_process));
else {
onError();
return parsed_process.takeError();
}
}
return parsed_processes;
}
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