mirror of
https://github.com/LadybirdBrowser/ladybird.git
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db886fe18b
This commit moves the implementation of getopt into AK, and converts its API to understand and use StringView instead of char*. Everything else is caught in the crossfire of making Option::accept_value() take a StringView instead of a char const*. With this, we must now pass a Span<StringView> to ArgsParser::parse(), applications using LibMain are unaffected, but anything not using that or taking its own argc/argv has to construct a Vector<StringView> for this method.
118 lines
4.1 KiB
C++
118 lines
4.1 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 <LibCore/System.h>
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#include <LibMain/Main.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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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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Core::ArgsParser args_parser;
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StringView pid_argument {};
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Vector<StringView> command;
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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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| PERF_EVENT_SIGNPOST;
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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), result at /sys/kernel/profile", 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(Core::ArgsParser::Option {
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Core::ArgsParser::OptionArgumentMode::Required,
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"Enable tracking specific event type", nullptr, 't', "event_type",
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[&](DeprecatedString 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 if (event_type == "syscall")
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event_mask |= PERF_EVENT_SYSCALL;
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else if (event_type == "read")
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event_mask |= PERF_EVENT_READ;
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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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args_parser.add_positional_argument(command, "Command to profile", "command", Core::ArgsParser::Required::No);
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args_parser.set_stop_on_first_non_option(true);
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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, syscall, read, kmalloc and kfree.");
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};
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if (!args_parser.parse(arguments, Core::ArgsParser::FailureBehavior::PrintUsage)) {
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print_types();
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exit(0);
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}
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if (pid_argument.is_empty() && command.is_empty() && !all_processes) {
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args_parser.print_usage(stdout, arguments.strings[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.is_empty() || 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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// FIXME: Handle error case.
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pid_t pid = all_processes ? -1 : pid_argument.to_int().release_value();
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if (wait || enable) {
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TRY(Core::System::profiling_enable(pid, event_mask));
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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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TRY(Core::System::profiling_disable(pid));
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if (free)
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TRY(Core::System::profiling_free_buffer(pid));
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return 0;
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}
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dbgln("Enabling profiling for PID {}", getpid());
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TRY(Core::System::profiling_enable(getpid(), event_mask));
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TRY(Core::System::exec(command[0], command, Core::System::SearchInPath::Yes));
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return 0;
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}
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