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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/profiling/symbolizer/symbolize_database.h"
#include <map>
#include <utility>
#include <vector>
#include "perfetto/base/logging.h"
#include "perfetto/ext/base/string_utils.h"
#include "perfetto/protozero/scattered_heap_buffer.h"
#include "perfetto/trace_processor/trace_processor.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 profiling {
namespace {
using trace_processor::Iterator;
constexpr const char* kQueryUnsymbolized =
"select spm.name, spm.build_id, spf.rel_pc, spm.load_bias "
"from stack_profile_frame spf "
"join stack_profile_mapping spm "
"on spf.mapping = spm.id "
"where spm.build_id != '' and spf.symbol_set_id IS NULL";
using NameAndBuildIdPair = std::pair<std::string, std::string>;
struct UnsymbolizedMapping {
std::string name;
std::string build_id;
uint64_t load_bias;
bool operator<(const UnsymbolizedMapping& o) const {
return std::tie(name, build_id, load_bias) <
std::tie(o.name, o.build_id, o.load_bias);
}
};
std::string FromHex(const char* str, size_t size) {
if (size % 2) {
PERFETTO_DFATAL_OR_ELOG("Failed to parse hex %s", str);
return "";
}
std::string result(size / 2, '\0');
for (size_t i = 0; i < size; i += 2) {
char hex_byte[3];
hex_byte[0] = str[i];
hex_byte[1] = str[i + 1];
hex_byte[2] = '\0';
char* end;
long int byte = strtol(hex_byte, &end, 16);
if (*end != '\0') {
PERFETTO_DFATAL_OR_ELOG("Failed to parse hex %s", str);
return "";
}
result[i / 2] = static_cast<char>(byte);
}
return result;
}
std::string FromHex(const std::string& str) {
return FromHex(str.c_str(), str.size());
}
std::map<UnsymbolizedMapping, std::vector<uint64_t>> GetUnsymbolizedFrames(
trace_processor::TraceProcessor* tp) {
std::map<UnsymbolizedMapping, std::vector<uint64_t>> res;
Iterator it = tp->ExecuteQuery(kQueryUnsymbolized);
while (it.Next()) {
int64_t load_bias = it.Get(3).AsLong();
PERFETTO_CHECK(load_bias >= 0);
UnsymbolizedMapping unsymbolized_mapping{it.Get(0).AsString(),
FromHex(it.Get(1).AsString()),
static_cast<uint64_t>(load_bias)};
int64_t rel_pc = it.Get(2).AsLong();
res[unsymbolized_mapping].emplace_back(rel_pc);
}
if (!it.Status().ok()) {
PERFETTO_DFATAL_OR_ELOG("Invalid iterator: %s",
it.Status().message().c_str());
return {};
}
return res;
}
} // namespace
void SymbolizeDatabase(trace_processor::TraceProcessor* tp,
Symbolizer* symbolizer,
std::function<void(const std::string&)> callback) {
PERFETTO_CHECK(symbolizer);
auto unsymbolized = GetUnsymbolizedFrames(tp);
for (auto it = unsymbolized.cbegin(); it != unsymbolized.cend(); ++it) {
const auto& unsymbolized_mapping = it->first;
const std::vector<uint64_t>& rel_pcs = it->second;
auto res = symbolizer->Symbolize(unsymbolized_mapping.name,
unsymbolized_mapping.build_id,
unsymbolized_mapping.load_bias, rel_pcs);
if (res.empty())
continue;
protozero::HeapBuffered<perfetto::protos::pbzero::Trace> trace;
auto* packet = trace->add_packet();
auto* module_symbols = packet->set_module_symbols();
module_symbols->set_path(unsymbolized_mapping.name);
module_symbols->set_build_id(unsymbolized_mapping.build_id);
PERFETTO_DCHECK(res.size() == rel_pcs.size());
for (size_t i = 0; i < res.size(); ++i) {
auto* address_symbols = module_symbols->add_address_symbols();
address_symbols->set_address(rel_pcs[i]);
for (const SymbolizedFrame& frame : res[i]) {
auto* line = address_symbols->add_lines();
line->set_function_name(frame.function_name);
line->set_source_file_name(frame.file_name);
line->set_line_number(frame.line);
}
}
callback(trace.SerializeAsString());
}
}
std::vector<std::string> GetPerfettoBinaryPath() {
const char* root = getenv("PERFETTO_BINARY_PATH");
if (root != nullptr)
return base::SplitString(root, ":");
return {};
}
} // namespace profiling
} // namespace perfetto
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