88 lines
1.7 KiB
C++
88 lines
1.7 KiB
C++
/* This file is part of the dynarmic project.
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* Copyright (c) 2018 MerryMage
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* SPDX-License-Identifier: 0BSD
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*/
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#include <cstddef>
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#include <string>
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#ifdef __linux__
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#include <cstdio>
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#include <cstdlib>
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#include <mutex>
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#include <sys/types.h>
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#include <unistd.h>
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#include <fmt/format.h>
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#include "common/common_types.h"
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namespace Dynarmic::Backend::X64 {
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namespace {
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std::mutex mutex;
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std::FILE* file = nullptr;
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void OpenFile() {
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const char* perf_dir = std::getenv("PERF_BUILDID_DIR");
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if (!perf_dir) {
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file = nullptr;
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return;
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}
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const pid_t pid = getpid();
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const std::string filename = fmt::format("{:s}/perf-{:d}.map", perf_dir, pid);
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file = std::fopen(filename.c_str(), "w");
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if (!file) {
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return;
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}
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std::setvbuf(file, nullptr, _IONBF, 0);
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}
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} // anonymous namespace
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namespace detail {
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void PerfMapRegister(const void* start, const void* end, std::string_view friendly_name) {
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std::lock_guard guard{mutex};
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if (!file) {
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OpenFile();
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if (!file) {
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return;
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}
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}
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const std::string line = fmt::format("{:016x} {:016x} {:s}\n", reinterpret_cast<u64>(start), reinterpret_cast<u64>(end) - reinterpret_cast<u64>(start), friendly_name);
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std::fwrite(line.data(), sizeof *line.data(), line.size(), file);
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}
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} // namespace detail
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void PerfMapClear() {
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std::lock_guard guard{mutex};
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if (!file) {
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return;
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}
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std::fclose(file);
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file = nullptr;
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OpenFile();
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}
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} // namespace Dynarmic::Backend::X64
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#else
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namespace Dynarmic::Backend::X64 {
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namespace detail {
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void PerfMapRegister(const void*, const void*, std::string_view) {}
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} // namespace detail
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void PerfMapClear() {}
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} // namespace Dynarmic::Backend::X64
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#endif
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