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Copy pathlogging.cc
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108 lines (95 loc) · 2.5 KB
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// Copyright 2018 Google LLC
//
// 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 "cc/logging.h"
#include <cstdlib>
#include <cstring>
#include <iostream>
#include "absl/debugging/stacktrace.h"
#include "absl/debugging/symbolize.h"
#include "absl/synchronization/mutex.h"
namespace minigo {
namespace internal {
namespace {
absl::Mutex* mutex() {
static auto* m = new absl::Mutex();
return m;
}
void DumpStackTrace(std::ostream* os) {
void* stack[64];
int depth = absl::GetStackTrace(stack, 64, 1);
char buffer[256];
for (int i = 0; i < depth; ++i) {
(*os) << " " << stack[i] << " ";
if (absl::Symbolize(stack[i], buffer, 256)) {
(*os) << buffer;
} else {
(*os) << "??";
}
(*os) << '\n';
}
}
} // namespace
LogStream::LogStream(const char* file, int line, LogLevel level)
: level_(level) {
if (level == LogLevel::INFO) {
// We don't add a prefix to MG_LOG(INFO) log lines because many things rely
// on the exact string being printed (GTP, correct formatting of position &
// node descriptions, etc).
return;
}
char c;
switch (level) {
case LogLevel::WARNING:
c = 'W';
break;
case LogLevel::ERROR:
c = 'E';
break;
case LogLevel::FATAL:
c = 'F';
break;
default:
c = 'U';
break;
}
const auto* f = std::strrchr(file, '/');
if (f == nullptr) {
f = std::strrchr(file, '\\');
}
if (f == nullptr) {
f = file;
} else {
f += 1;
}
*this << '[' << c << "] " << f << ':' << line << " : ";
}
LogStream::~LogStream() {
{
absl::MutexLock lock(mutex());
std::cerr << stream_.rdbuf() << '\n';
if (level_ == LogLevel::FATAL) {
DumpStackTrace(&std::cerr);
}
std::cerr << std::flush;
}
if (level_ == LogLevel::FATAL) {
abort();
}
}
CheckFailStream::CheckFailStream(const char* cond, const char* file, int line)
: impl_(file, line, LogLevel::FATAL) {
impl_ << "check failed: " << cond << '\n';
}
} // namespace internal
} // namespace minigo