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//===-- TraceIntelPTJSONStructs.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 "TraceIntelPTJSONStructs.h"
#include "llvm/Support/JSON.h"
#include <optional>
#include <string>
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::trace_intel_pt;
using namespace llvm;
using namespace llvm::json;
namespace lldb_private {
namespace trace_intel_pt {
std::optional<std::vector<lldb::cpu_id_t>>
JSONTraceBundleDescription::GetCpuIds() {
if (!cpus)
return std::nullopt;
std::vector<lldb::cpu_id_t> cpu_ids;
for (const JSONCpu &cpu : *cpus)
cpu_ids.push_back(cpu.id);
return cpu_ids;
}
json::Value toJSON(const JSONModule &module) {
json::Object json_module;
json_module["systemPath"] = module.system_path;
if (module.file)
json_module["file"] = *module.file;
json_module["loadAddress"] = toJSON(module.load_address, true);
if (module.uuid)
json_module["uuid"] = *module.uuid;
return std::move(json_module);
}
bool fromJSON(const json::Value &value, JSONModule &module, Path path) {
ObjectMapper o(value, path);
return o && o.map("systemPath", module.system_path) &&
o.map("file", module.file) &&
o.map("loadAddress", module.load_address) &&
o.map("uuid", module.uuid);
}
json::Value toJSON(const JSONThread &thread) {
json::Object obj{{"tid", thread.tid}};
if (thread.ipt_trace)
obj["iptTrace"] = *thread.ipt_trace;
return obj;
}
bool fromJSON(const json::Value &value, JSONThread &thread, Path path) {
ObjectMapper o(value, path);
return o && o.map("tid", thread.tid) && o.map("iptTrace", thread.ipt_trace);
}
json::Value toJSON(const JSONProcess &process) {
return Object{
{"pid", process.pid},
{"triple", process.triple},
{"threads", process.threads},
{"modules", process.modules},
};
}
bool fromJSON(const json::Value &value, JSONProcess &process, Path path) {
ObjectMapper o(value, path);
return o && o.map("pid", process.pid) && o.map("triple", process.triple) &&
o.map("threads", process.threads) && o.map("modules", process.modules);
}
json::Value toJSON(const JSONCpu &cpu) {
return Object{
{"id", cpu.id},
{"iptTrace", cpu.ipt_trace},
{"contextSwitchTrace", cpu.context_switch_trace},
};
}
bool fromJSON(const json::Value &value, JSONCpu &cpu, Path path) {
ObjectMapper o(value, path);
uint64_t cpu_id;
if (!(o && o.map("id", cpu_id) && o.map("iptTrace", cpu.ipt_trace) &&
o.map("contextSwitchTrace", cpu.context_switch_trace)))
return false;
cpu.id = cpu_id;
return true;
}
json::Value toJSON(const pt_cpu &cpu_info) {
return Object{
{"vendor", cpu_info.vendor == pcv_intel ? "GenuineIntel" : "Unknown"},
{"family", cpu_info.family},
{"model", cpu_info.model},
{"stepping", cpu_info.stepping},
};
}
bool fromJSON(const json::Value &value, pt_cpu &cpu_info, Path path) {
ObjectMapper o(value, path);
std::string vendor;
uint64_t family, model, stepping;
if (!(o && o.map("vendor", vendor) && o.map("family", family) &&
o.map("model", model) && o.map("stepping", stepping)))
return false;
cpu_info.vendor = vendor == "GenuineIntel" ? pcv_intel : pcv_unknown;
cpu_info.family = family;
cpu_info.model = model;
cpu_info.stepping = stepping;
return true;
}
json::Value toJSON(const JSONKernel &kernel) {
json::Object json_module;
if (kernel.load_address)
json_module["loadAddress"] = toJSON(*kernel.load_address, true);
json_module["file"] = kernel.file;
return std::move(json_module);
}
bool fromJSON(const json::Value &value, JSONKernel &kernel, Path path) {
ObjectMapper o(value, path);
return o && o.map("loadAddress", kernel.load_address) &&
o.map("file", kernel.file);
}
json::Value toJSON(const JSONTraceBundleDescription &bundle_description) {
return Object{
{"type", bundle_description.type},
{"processes", bundle_description.processes},
// We have to do this because the compiler fails at doing it
// automatically because pt_cpu is not in a namespace
{"cpuInfo", toJSON(bundle_description.cpu_info)},
{"cpus", bundle_description.cpus},
{"tscPerfZeroConversion", bundle_description.tsc_perf_zero_conversion},
{"kernel", bundle_description.kernel}};
}
bool fromJSON(const json::Value &value,
JSONTraceBundleDescription &bundle_description, Path path) {
ObjectMapper o(value, path);
if (!(o && o.map("processes", bundle_description.processes) &&
o.map("type", bundle_description.type) &&
o.map("cpus", bundle_description.cpus) &&
o.map("tscPerfZeroConversion",
bundle_description.tsc_perf_zero_conversion) &&
o.map("kernel", bundle_description.kernel)))
return false;
if (bundle_description.cpus && !bundle_description.tsc_perf_zero_conversion) {
path.report(
"\"tscPerfZeroConversion\" is required when \"cpus\" is provided");
return false;
}
// We have to do this because the compiler fails at doing it automatically
// because pt_cpu is not in a namespace
if (!fromJSON(*value.getAsObject()->get("cpuInfo"),
bundle_description.cpu_info, path.field("cpuInfo")))
return false;
// When kernel section is present, this is kernel-only tracing. Thus, throw an
// error if the "processes" section is non-empty or the "cpus" section is not
// present.
if (bundle_description.kernel) {
if (bundle_description.processes &&
!bundle_description.processes->empty()) {
path.report("\"processes\" must be empty when \"kernel\" is provided");
return false;
}
if (!bundle_description.cpus) {
path.report("\"cpus\" is required when \"kernel\" is provided");
return false;
}
} else if (!bundle_description.processes) {
// Usermode tracing requires processes section.
path.report("\"processes\" is required when \"kernel\" is not provided");
return false;
}
return true;
}
} // namespace trace_intel_pt
} // namespace lldb_private
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