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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.
*/
#include "tools/trace_to_text/utils.h"
#include <inttypes.h>
#include <stdio.h>
#include <memory>
#include <ostream>
#include <set>
#include <utility>
#include "perfetto/base/logging.h"
#include "perfetto/ext/base/file_utils.h"
#include "perfetto/ext/base/optional.h"
#include "perfetto/ext/base/scoped_file.h"
#include "perfetto/ext/base/string_splitter.h"
#include "perfetto/protozero/scattered_heap_buffer.h"
#include "perfetto/trace_processor/trace_processor.h"
#include "protos/perfetto/trace/profiling/deobfuscation.pbzero.h"
#include "protos/perfetto/trace/profiling/heap_graph.pbzero.h"
#include "protos/perfetto/trace/profiling/profile_common.pbzero.h"
#include "protos/perfetto/trace/trace.pbzero.h"
#include "protos/perfetto/trace/trace_packet.pbzero.h"
namespace perfetto {
namespace trace_to_text {
namespace {
#if PERFETTO_BUILDFLAG(PERFETTO_ZLIB)
constexpr size_t kCompressionBufferSize = 500 * 1024;
#endif
} // namespace
void ForEachPacketBlobInTrace(
std::istream* input,
const std::function<void(std::unique_ptr<char[]>, size_t)>& f) {
size_t bytes_processed = 0;
// The trace stream can be very large. We cannot just pass it in one go to
// libprotobuf as that will refuse to parse messages > 64MB. However we know
// that a trace is merely a sequence of TracePackets. Here we just manually
// tokenize the repeated TracePacket messages and parse them individually
// using libprotobuf.
for (uint32_t i = 0;; i++) {
if ((i & 0x3f) == 0) {
fprintf(stderr, "Processing trace: %8zu KB%c", bytes_processed / 1024,
kProgressChar);
fflush(stderr);
}
// A TracePacket consists in one byte stating its field id and type ...
char preamble;
input->get(preamble);
if (!input->good())
break;
bytes_processed++;
PERFETTO_DCHECK(preamble == 0x0a); // Field ID:1, type:length delimited.
// ... a varint stating its size ...
uint32_t field_size = 0;
uint32_t shift = 0;
for (;;) {
char c = 0;
input->get(c);
field_size |= static_cast<uint32_t>(c & 0x7f) << shift;
shift += 7;
bytes_processed++;
if (!(c & 0x80))
break;
}
// ... and the actual TracePacket itself.
std::unique_ptr<char[]> buf(new char[field_size]);
input->read(buf.get(), static_cast<std::streamsize>(field_size));
bytes_processed += field_size;
f(std::move(buf), field_size);
}
}
bool ReadTrace(trace_processor::TraceProcessor* tp, std::istream* input) {
// 1MB chunk size seems the best tradeoff on a MacBook Pro 2013 - i7 2.8 GHz.
constexpr size_t kChunkSize = 1024 * 1024;
// Printing the status update on stderr can be a perf bottleneck. On WASM print
// status updates more frequently because it can be slower to parse each chunk.
#if PERFETTO_BUILDFLAG(PERFETTO_OS_WASM)
constexpr int kStderrRate = 1;
#else
constexpr int kStderrRate = 128;
#endif
uint64_t file_size = 0;
for (int i = 0;; i++) {
if (i % kStderrRate == 0) {
fprintf(stderr, "Loading trace %.2f MB%c",
static_cast<double>(file_size) / 1.0e6, kProgressChar);
fflush(stderr);
}
std::unique_ptr<uint8_t[]> buf(new uint8_t[kChunkSize]);
input->read(reinterpret_cast<char*>(buf.get()), kChunkSize);
if (input->bad()) {
PERFETTO_ELOG("Failed when reading trace");
return false;
}
auto rsize = input->gcount();
if (rsize <= 0)
break;
file_size += static_cast<uint64_t>(rsize);
tp->Parse(std::move(buf), static_cast<size_t>(rsize));
}
fprintf(stderr, "Loaded trace%c", kProgressChar);
fflush(stderr);
return true;
}
void IngestTraceOrDie(trace_processor::TraceProcessor* tp,
const std::string& trace_proto) {
std::unique_ptr<uint8_t[]> buf(new uint8_t[trace_proto.size()]);
memcpy(buf.get(), trace_proto.data(), trace_proto.size());
auto status = tp->Parse(std::move(buf), trace_proto.size());
if (!status.ok()) {
PERFETTO_DFATAL_OR_ELOG("Failed to parse: %s", status.message().c_str());
}
}
TraceWriter::TraceWriter(std::ostream* output) : output_(output) {}
TraceWriter::~TraceWriter() {
output_->flush();
}
void TraceWriter::Write(const std::string& s) {
Write(s.data(), s.size());
}
void TraceWriter::Write(const char* data, size_t sz) {
output_->write(data, static_cast<std::streamsize>(sz));
}
#if PERFETTO_BUILDFLAG(PERFETTO_ZLIB)
DeflateTraceWriter::DeflateTraceWriter(std::ostream* output)
: TraceWriter(output),
buf_(base::PagedMemory::Allocate(kCompressionBufferSize)),
start_(static_cast<uint8_t*>(buf_.Get())),
end_(start_ + buf_.size()) {
CheckEq(deflateInit(&stream_, 9), Z_OK);
stream_.next_out = start_;
stream_.avail_out = static_cast<unsigned int>(end_ - start_);
}
DeflateTraceWriter::~DeflateTraceWriter() {
// Drain compressor until it has no more input, and has flushed its internal
// buffers.
while (deflate(&stream_, Z_FINISH) != Z_STREAM_END) {
Flush();
}
// Flush any outstanding output bytes to the backing TraceWriter.
Flush();
PERFETTO_CHECK(stream_.avail_out == static_cast<size_t>(end_ - start_));
CheckEq(deflateEnd(&stream_), Z_OK);
}
void DeflateTraceWriter::Write(const char* data, size_t sz) {
stream_.next_in = reinterpret_cast<uint8_t*>(const_cast<char*>(data));
stream_.avail_in = static_cast<unsigned int>(sz);
while (stream_.avail_in > 0) {
CheckEq(deflate(&stream_, Z_NO_FLUSH), Z_OK);
if (stream_.avail_out == 0) {
Flush();
}
}
}
void DeflateTraceWriter::Flush() {
TraceWriter::Write(reinterpret_cast<char*>(start_),
static_cast<size_t>(stream_.next_out - start_));
stream_.next_out = start_;
stream_.avail_out = static_cast<unsigned int>(end_ - start_);
}
void DeflateTraceWriter::CheckEq(int actual_code, int expected_code) {
if (actual_code == expected_code)
return;
PERFETTO_FATAL("Expected %d got %d: %s", actual_code, expected_code,
stream_.msg);
}
#else
DeflateTraceWriter::DeflateTraceWriter(std::ostream* output)
: TraceWriter(output) {
PERFETTO_ELOG("Cannot compress. Zlib is not enabled in the build config");
}
DeflateTraceWriter::~DeflateTraceWriter() = default;
#endif // PERFETTO_BUILDFLAG(PERFETTO_ZLIB)
} // namespace trace_to_text
} // namespace perfetto
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