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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/trace_to_text.h"
#include <google/protobuf/compiler/importer.h>
#include <google/protobuf/dynamic_message.h>
#include <google/protobuf/io/zero_copy_stream_impl.h>
#include <google/protobuf/text_format.h>
#include "perfetto/base/logging.h"
#include "perfetto/ext/base/file_utils.h"
#include "perfetto/ext/base/scoped_file.h"
#include "tools/trace_to_text/proto_full_utils.h"
#include "tools/trace_to_text/utils.h"
#include "protos/perfetto/trace/trace.pbzero.h"
#include "protos/perfetto/trace/trace_packet.pbzero.h"
#if PERFETTO_BUILDFLAG(PERFETTO_ZLIB)
#include <zlib.h>
#endif
namespace perfetto {
namespace trace_to_text {
namespace {
using google::protobuf::Descriptor;
using google::protobuf::DynamicMessageFactory;
using google::protobuf::FieldDescriptor;
using google::protobuf::FileDescriptor;
using google::protobuf::Message;
using google::protobuf::Reflection;
using google::protobuf::TextFormat;
using google::protobuf::compiler::DiskSourceTree;
using google::protobuf::compiler::Importer;
using google::protobuf::io::OstreamOutputStream;
using google::protobuf::io::ZeroCopyOutputStream;
inline void WriteToZeroCopyOutput(ZeroCopyOutputStream* output,
const char* str,
size_t length) {
if (length == 0)
return;
void* data;
int size = 0;
size_t bytes_to_copy = 0;
while (length) {
output->Next(&data, &size);
bytes_to_copy = std::min(length, static_cast<size_t>(size));
memcpy(data, str, bytes_to_copy);
length -= bytes_to_copy;
str += bytes_to_copy;
}
output->BackUp(size - static_cast<int>(bytes_to_copy));
}
constexpr char kCompressedPacketsPrefix[] = "compressed_packets {\n";
constexpr char kCompressedPacketsSuffix[] = "}\n";
constexpr char kIndentedPacketPrefix[] = " packet {\n";
constexpr char kIndentedPacketSuffix[] = " }\n";
constexpr char kPacketPrefix[] = "packet {\n";
constexpr char kPacketSuffix[] = "}\n";
void PrintCompressedPackets(const std::string& packets,
Message* compressed_msg_scratch,
ZeroCopyOutputStream* output) {
#if PERFETTO_BUILDFLAG(PERFETTO_ZLIB)
uint8_t out[4096];
std::vector<uint8_t> data;
z_stream stream{};
stream.next_in =
const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(packets.data()));
stream.avail_in = static_cast<unsigned int>(packets.length());
if (inflateInit(&stream) != Z_OK) {
PERFETTO_ELOG("Error when initiliazing zlib to decompress packets");
return;
}
int ret;
do {
stream.next_out = out;
stream.avail_out = sizeof(out);
ret = inflate(&stream, Z_NO_FLUSH);
if (ret != Z_STREAM_END && ret != Z_OK) {
PERFETTO_ELOG("Error when decompressing packets");
return;
}
data.insert(data.end(), out, out + (sizeof(out) - stream.avail_out));
} while (ret != Z_STREAM_END);
inflateEnd(&stream);
protos::pbzero::Trace::Decoder decoder(data.data(), data.size());
WriteToZeroCopyOutput(output, kCompressedPacketsPrefix,
sizeof(kCompressedPacketsPrefix) - 1);
TextFormat::Printer printer;
printer.SetInitialIndentLevel(2);
for (auto it = decoder.packet(); it; ++it) {
protozero::ConstBytes cb = *it;
compressed_msg_scratch->ParseFromArray(cb.data, static_cast<int>(cb.size));
WriteToZeroCopyOutput(output, kIndentedPacketPrefix,
sizeof(kIndentedPacketPrefix) - 1);
printer.Print(*compressed_msg_scratch, output);
WriteToZeroCopyOutput(output, kIndentedPacketSuffix,
sizeof(kIndentedPacketSuffix) - 1);
}
WriteToZeroCopyOutput(output, kCompressedPacketsSuffix,
sizeof(kCompressedPacketsSuffix) - 1);
#else
base::ignore_result(packets);
base::ignore_result(compressed_msg_scratch);
base::ignore_result(kIndentedPacketPrefix);
base::ignore_result(kIndentedPacketSuffix);
WriteToZeroCopyOutput(output, kCompressedPacketsPrefix,
sizeof(kCompressedPacketsPrefix) - 1);
static const char kErrMsg[] =
"Cannot decode compressed packets. zlib not enabled in the build config";
WriteToZeroCopyOutput(output, kErrMsg, sizeof(kErrMsg) - 1);
WriteToZeroCopyOutput(output, kCompressedPacketsSuffix,
sizeof(kCompressedPacketsSuffix) - 1);
static bool log_once = [] {
PERFETTO_ELOG("%s", kErrMsg);
return true;
}();
base::ignore_result(log_once);
#endif // PERFETTO_BUILDFLAG(PERFETTO_ZLIB)
}
} // namespace
int TraceToText(std::istream* input, std::ostream* output) {
const std::string proto_path = "protos/perfetto/trace/trace_packet.proto";
if (!base::OpenFile(proto_path, O_RDONLY)) {
PERFETTO_ELOG("Cannot open %s.", proto_path.c_str());
PERFETTO_ELOG(
"Text mode only works from the perfetto directory. Googlers, see "
"b/131425913");
return 1;
}
DiskSourceTree dst;
dst.MapPath("", "");
MultiFileErrorCollectorImpl mfe;
Importer importer(&dst, &mfe);
const FileDescriptor* parsed_file =
importer.Import("protos/perfetto/trace/trace_packet.proto");
DynamicMessageFactory dmf;
const Descriptor* trace_descriptor = parsed_file->message_type(0);
const Message* root = dmf.GetPrototype(trace_descriptor);
OstreamOutputStream zero_copy_output(output);
OstreamOutputStream* zero_copy_output_ptr = &zero_copy_output;
Message* msg = root->New();
constexpr uint32_t kCompressedPacketFieldDescriptor = 50;
const Reflection* reflect = msg->GetReflection();
const FieldDescriptor* compressed_desc =
trace_descriptor->FindFieldByNumber(kCompressedPacketFieldDescriptor);
Message* compressed_msg_scratch = root->New();
std::string compressed_packet_scratch;
TextFormat::Printer printer;
printer.SetInitialIndentLevel(1);
ForEachPacketBlobInTrace(
input, [msg, reflect, compressed_desc, zero_copy_output_ptr,
&compressed_packet_scratch, compressed_msg_scratch,
&printer](std::unique_ptr<char[]> buf, size_t size) {
if (!msg->ParseFromArray(buf.get(), static_cast<int>(size))) {
PERFETTO_ELOG("Skipping invalid packet");
return;
}
if (reflect->HasField(*msg, compressed_desc)) {
const auto& compressed_packets = reflect->GetStringReference(
*msg, compressed_desc, &compressed_packet_scratch);
PrintCompressedPackets(compressed_packets, compressed_msg_scratch,
zero_copy_output_ptr);
} else {
WriteToZeroCopyOutput(zero_copy_output_ptr, kPacketPrefix,
sizeof(kPacketPrefix) - 1);
printer.Print(*msg, zero_copy_output_ptr);
WriteToZeroCopyOutput(zero_copy_output_ptr, kPacketSuffix,
sizeof(kPacketSuffix) - 1);
}
});
return 0;
}
} // namespace trace_to_text
} // namespace perfetto
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