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/*
* Copyright (C) 2019 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.
*/
#include "src/trace_processor/forwarding_trace_parser.h"
#include "perfetto/base/logging.h"
#include "perfetto/ext/base/string_utils.h"
#include "src/trace_processor/gzip_trace_parser.h"
#include "src/trace_processor/importers/proto/proto_trace_parser.h"
#include "src/trace_processor/importers/proto/proto_trace_tokenizer.h"
#include "src/trace_processor/trace_sorter.h"
#if PERFETTO_BUILDFLAG(PERFETTO_TP_FUCHSIA)
#include "src/trace_processor/importers/fuchsia/fuchsia_trace_parser.h"
#include "src/trace_processor/importers/fuchsia/fuchsia_trace_tokenizer.h"
#endif // PERFETTO_BUILDFLAG(PERFETTO_TP_FUCHSIA)
// JSON parsing and exporting is only supported in the standalone and
// Chromium builds.
#if PERFETTO_BUILDFLAG(PERFETTO_TP_JSON_IMPORT)
#include "src/trace_processor/importers/json/json_trace_parser.h"
#include "src/trace_processor/importers/json/json_trace_tokenizer.h"
#endif // PERFETTO_BUILDFLAG(PERFETTO_TP_JSON_IMPORT)
namespace perfetto {
namespace trace_processor {
namespace {
#if !PERFETTO_BUILDFLAG(PERFETTO_ZLIB)
const char kNoZlibErr[] =
"Cannot open compressed trace. zlib not enabled in the build config";
#endif
inline bool isspace(unsigned char c) {
return ::isspace(c);
}
std::string RemoveWhitespace(const std::string& input) {
std::string str(input);
str.erase(std::remove_if(str.begin(), str.end(), isspace), str.end());
return str;
}
// Fuchsia traces have a magic number as documented here:
// https://fuchsia.googlesource.com/fuchsia/+/HEAD/docs/development/tracing/trace-format/README.md#magic-number-record-trace-info-type-0
constexpr uint64_t kFuchsiaMagicNumber = 0x0016547846040010;
} // namespace
ForwardingTraceParser::ForwardingTraceParser(TraceProcessorContext* context)
: context_(context) {}
ForwardingTraceParser::~ForwardingTraceParser() {}
util::Status ForwardingTraceParser::Parse(std::unique_ptr<uint8_t[]> data,
size_t size) {
// If this is the first Parse() call, guess the trace type and create the
// appropriate parser.
if (!reader_) {
TraceType trace_type;
{
auto scoped_trace = context_->storage->TraceExecutionTimeIntoStats(
stats::guess_trace_type_duration_ns);
trace_type = GuessTraceType(data.get(), size);
}
switch (trace_type) {
case kJsonTraceType: {
PERFETTO_DLOG("JSON trace detected");
#if PERFETTO_BUILDFLAG(PERFETTO_TP_JSON_IMPORT)
reader_.reset(new JsonTraceTokenizer(context_));
// JSON traces have no guarantees about the order of events in them.
int64_t window_size_ns = std::numeric_limits<int64_t>::max();
context_->sorter.reset(new TraceSorter(context_, window_size_ns));
context_->parser.reset(new JsonTraceParser(context_));
#else // PERFETTO_BUILDFLAG(PERFETTO_TP_JSON_IMPORT)
PERFETTO_FATAL("JSON traces not supported.");
#endif // PERFETTO_BUILDFLAG(PERFETTO_TP_JSON_IMPORT)
break;
}
case kProtoTraceType: {
PERFETTO_DLOG("Proto trace detected");
// This will be reduced once we read the trace config and we see flush
// period being set.
int64_t window_size_ns = std::numeric_limits<int64_t>::max();
reader_.reset(new ProtoTraceTokenizer(context_));
context_->sorter.reset(new TraceSorter(context_, window_size_ns));
context_->parser.reset(new ProtoTraceParser(context_));
break;
}
case kFuchsiaTraceType: {
#if PERFETTO_BUILDFLAG(PERFETTO_TP_FUCHSIA)
PERFETTO_DLOG("Fuchsia trace detected");
// Fuschia traces can have massively out of order events.
int64_t window_size_ns = std::numeric_limits<int64_t>::max();
reader_.reset(new FuchsiaTraceTokenizer(context_));
context_->sorter.reset(new TraceSorter(context_, window_size_ns));
context_->parser.reset(new FuchsiaTraceParser(context_));
#else // PERFETTO_BUILDFLAG(PERFETTO_TP_FUCHSIA)
PERFETTO_FATAL("Fuchsia traces not supported.");
#endif // PERFETTO_BUILDFLAG(PERFETTO_TP_FUCHSIA)
break;
}
case kSystraceTraceType:
PERFETTO_DLOG("Systrace trace detected");
if (context_->systrace_trace_parser) {
reader_ = std::move(context_->systrace_trace_parser);
break;
} else {
return util::ErrStatus("Systrace support is disabled");
}
case kGzipTraceType:
PERFETTO_DLOG("gzip trace detected");
#if PERFETTO_BUILDFLAG(PERFETTO_ZLIB)
reader_.reset(new GzipTraceParser(context_));
break;
#else
return util::ErrStatus(kNoZlibErr);
#endif
case kCtraceTraceType:
PERFETTO_DLOG("ctrace trace detected");
#if PERFETTO_BUILDFLAG(PERFETTO_ZLIB)
reader_.reset(new GzipTraceParser(context_));
break;
#else
return util::ErrStatus(kNoZlibErr);
#endif
case kUnknownTraceType:
return util::ErrStatus("Unknown trace type provided");
}
}
return reader_->Parse(std::move(data), size);
}
TraceType GuessTraceType(const uint8_t* data, size_t size) {
if (size == 0)
return kUnknownTraceType;
std::string start(reinterpret_cast<const char*>(data),
std::min<size_t>(size, 20));
std::string start_minus_white_space = RemoveWhitespace(start);
if (base::StartsWith(start_minus_white_space, "{\"traceEvents\":["))
return kJsonTraceType;
if (base::StartsWith(start_minus_white_space, "[{"))
return kJsonTraceType;
if (size >= 8) {
uint64_t first_word = *reinterpret_cast<const uint64_t*>(data);
if (first_word == kFuchsiaMagicNumber)
return kFuchsiaTraceType;
}
// Systrace with header but no leading HTML.
if (base::StartsWith(start, "# tracer"))
return kSystraceTraceType;
// Systrace with leading HTML.
if (base::StartsWith(start, "<!DOCTYPE html>") ||
base::StartsWith(start, "<html>"))
return kSystraceTraceType;
// Ctrace is deflate'ed systrace.
if (start.find("TRACE:") != std::string::npos)
return kCtraceTraceType;
// Systrace with no header or leading HTML.
if (base::StartsWith(start, " "))
return kSystraceTraceType;
// gzip'ed trace containing one of the other formats.
if (base::StartsWith(start, "\x1f\x8b"))
return kGzipTraceType;
return kProtoTraceType;
}
} // namespace trace_processor
} // namespace perfetto
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