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130 lines
4 KiB
C++
130 lines
4 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCore/ArgsParser.h>
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#include <serenity.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int main(int argc, char** argv)
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{
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Core::ArgsParser args_parser;
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const char* pid_argument = nullptr;
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const char* cmd_argument = nullptr;
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bool wait = false;
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bool free = false;
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bool enable = false;
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bool disable = false;
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bool all_processes = false;
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u64 event_mask = PERF_EVENT_MMAP | PERF_EVENT_MUNMAP | PERF_EVENT_PROCESS_CREATE
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| PERF_EVENT_PROCESS_EXEC | PERF_EVENT_PROCESS_EXIT | PERF_EVENT_THREAD_CREATE | PERF_EVENT_THREAD_EXIT;
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bool seen_event_type_arg = false;
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args_parser.add_option(pid_argument, "Target PID", nullptr, 'p', "PID");
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args_parser.add_option(all_processes, "Profile all processes (super-user only)", nullptr, 'a');
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args_parser.add_option(enable, "Enable", nullptr, 'e');
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args_parser.add_option(disable, "Disable", nullptr, 'd');
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args_parser.add_option(free, "Free the profiling buffer for the associated process(es).", nullptr, 'f');
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args_parser.add_option(wait, "Enable profiling and wait for user input to disable.", nullptr, 'w');
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args_parser.add_option(cmd_argument, "Command", nullptr, 'c', "command");
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args_parser.add_option(Core::ArgsParser::Option {
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true, "Enable tracking specific event type", nullptr, 't', "event_type",
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[&](String event_type) {
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seen_event_type_arg = true;
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if (event_type == "sample")
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event_mask |= PERF_EVENT_SAMPLE;
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else if (event_type == "context_switch")
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event_mask |= PERF_EVENT_CONTEXT_SWITCH;
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else if (event_type == "kmalloc")
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event_mask |= PERF_EVENT_KMALLOC;
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else if (event_type == "kfree")
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event_mask |= PERF_EVENT_KFREE;
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else if (event_type == "page_fault")
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event_mask |= PERF_EVENT_PAGE_FAULT;
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else {
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warnln("Unknown event type '{}' specified.", event_type);
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exit(1);
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}
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return true;
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} });
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auto print_types = [] {
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outln();
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outln("Event type can be one of: sample, context_switch, page_fault, kmalloc and kfree.");
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};
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if (!args_parser.parse(argc, argv, Core::ArgsParser::FailureBehavior::PrintUsage)) {
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print_types();
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exit(1);
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}
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if (!pid_argument && !cmd_argument && !all_processes) {
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args_parser.print_usage(stdout, argv[0]);
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print_types();
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return 0;
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}
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if (!seen_event_type_arg)
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event_mask |= PERF_EVENT_SAMPLE;
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if (pid_argument || all_processes) {
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if (!(enable ^ disable ^ wait ^ free)) {
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warnln("-p <PID> requires -e xor -d xor -w xor -f.");
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return 1;
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}
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pid_t pid = all_processes ? -1 : atoi(pid_argument);
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if (wait || enable) {
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if (profiling_enable(pid, event_mask) < 0) {
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perror("profiling_enable");
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return 1;
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}
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if (!wait)
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return 0;
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}
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if (wait) {
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outln("Profiling enabled, waiting for user input to disable...");
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(void)getchar();
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}
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if (wait || disable) {
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if (profiling_disable(pid) < 0) {
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perror("profiling_disable");
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return 1;
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}
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outln("Profiling disabled.");
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}
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if (free && profiling_free_buffer(pid) < 0) {
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perror("profiling_disable");
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return 1;
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}
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return 0;
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}
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auto cmd_parts = String(cmd_argument).split(' ');
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Vector<const char*> cmd_argv;
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for (auto& part : cmd_parts)
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cmd_argv.append(part.characters());
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cmd_argv.append(nullptr);
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dbgln("Enabling profiling for PID {}", getpid());
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profiling_enable(getpid(), event_mask);
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if (execvp(cmd_argv[0], const_cast<char**>(cmd_argv.data())) < 0) {
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perror("execv");
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return 1;
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}
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return 0;
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}
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