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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// For bazel build.
#include "perfetto/base/build_config.h"
#if PERFETTO_BUILDFLAG(PERFETTO_TP_JSON_IMPORT)
#include "src/trace_processor/importers/json/json_trace_parser.h"
#include <inttypes.h>
#include <json/reader.h>
#include <json/value.h>
#include <limits>
#include <string>
#include "perfetto/base/logging.h"
#include "perfetto/ext/base/string_view.h"
#include "perfetto/ext/base/utils.h"
#include "src/trace_processor/importers/json/json_trace_utils.h"
#include "src/trace_processor/process_tracker.h"
#include "src/trace_processor/slice_tracker.h"
#include "src/trace_processor/trace_processor_context.h"
#include "src/trace_processor/track_tracker.h"
namespace perfetto {
namespace trace_processor {
JsonTraceParser::JsonTraceParser(TraceProcessorContext* context)
: context_(context) {}
JsonTraceParser::~JsonTraceParser() = default;
void JsonTraceParser::ParseFtracePacket(uint32_t,
int64_t,
TimestampedTracePiece) {
PERFETTO_FATAL("Json Trace Parser cannot handle ftrace packets.");
}
void JsonTraceParser::ParseTracePacket(int64_t timestamp,
TimestampedTracePiece ttp) {
PERFETTO_DCHECK(ttp.json_value != nullptr);
const Json::Value& value = *(ttp.json_value);
ProcessTracker* procs = context_->process_tracker.get();
TraceStorage* storage = context_->storage.get();
SliceTracker* slice_tracker = context_->slice_tracker.get();
auto& ph = value["ph"];
if (!ph.isString())
return;
char phase = *ph.asCString();
base::Optional<uint32_t> opt_pid;
base::Optional<uint32_t> opt_tid;
if (value.isMember("pid"))
opt_pid = json_trace_utils::CoerceToUint32(value["pid"]);
if (value.isMember("tid"))
opt_tid = json_trace_utils::CoerceToUint32(value["tid"]);
uint32_t pid = opt_pid.value_or(0);
uint32_t tid = opt_tid.value_or(pid);
base::StringView cat = value.isMember("cat")
? base::StringView(value["cat"].asCString())
: base::StringView();
base::StringView name = value.isMember("name")
? base::StringView(value["name"].asCString())
: base::StringView();
StringId cat_id = storage->InternString(cat);
StringId name_id = storage->InternString(name);
UniqueTid utid = procs->UpdateThread(tid, pid);
switch (phase) {
case 'B': { // TRACE_EVENT_BEGIN.
TrackId track_id = context_->track_tracker->InternThreadTrack(utid);
slice_tracker->Begin(timestamp, track_id, cat_id, name_id);
break;
}
case 'E': { // TRACE_EVENT_END.
TrackId track_id = context_->track_tracker->InternThreadTrack(utid);
slice_tracker->End(timestamp, track_id, cat_id, name_id);
break;
}
case 'X': { // TRACE_EVENT (scoped event).
base::Optional<int64_t> opt_dur =
json_trace_utils::CoerceToNs(value["dur"]);
if (!opt_dur.has_value())
return;
TrackId track_id = context_->track_tracker->InternThreadTrack(utid);
slice_tracker->Scoped(timestamp, track_id, cat_id, name_id,
opt_dur.value());
break;
}
case 'M': { // Metadata events (process and thread names).
if (strcmp(value["name"].asCString(), "thread_name") == 0 &&
!value["args"]["name"].empty()) {
const char* thread_name = value["args"]["name"].asCString();
auto thread_name_id = context_->storage->InternString(thread_name);
procs->UpdateThreadName(tid, thread_name_id);
break;
}
if (strcmp(value["name"].asCString(), "process_name") == 0 &&
!value["args"]["name"].empty()) {
const char* proc_name = value["args"]["name"].asCString();
procs->SetProcessMetadata(pid, base::nullopt, proc_name);
break;
}
}
}
}
} // namespace trace_processor
} // namespace perfetto
#endif // PERFETTO_BUILDFLAG(PERFETTO_TP_JSON_IMPORT)
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