1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/ArgsParser.h>
#include <serenity.h>
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char** argv)
{
Core::ArgsParser args_parser;
const char* pid_argument = nullptr;
const char* cmd_argument = nullptr;
bool wait = false;
bool free = false;
bool enable = false;
bool disable = false;
bool all_processes = false;
u64 event_mask = PERF_EVENT_MMAP | PERF_EVENT_MUNMAP | PERF_EVENT_PROCESS_CREATE
| PERF_EVENT_PROCESS_EXEC | PERF_EVENT_PROCESS_EXIT | PERF_EVENT_THREAD_CREATE | PERF_EVENT_THREAD_EXIT
| PERF_EVENT_SIGNPOST;
bool seen_event_type_arg = false;
args_parser.add_option(pid_argument, "Target PID", nullptr, 'p', "PID");
args_parser.add_option(all_processes, "Profile all processes (super-user only)", nullptr, 'a');
args_parser.add_option(enable, "Enable", nullptr, 'e');
args_parser.add_option(disable, "Disable", nullptr, 'd');
args_parser.add_option(free, "Free the profiling buffer for the associated process(es).", nullptr, 'f');
args_parser.add_option(wait, "Enable profiling and wait for user input to disable.", nullptr, 'w');
args_parser.add_option(cmd_argument, "Command", nullptr, 'c', "command");
args_parser.add_option(Core::ArgsParser::Option {
true, "Enable tracking specific event type", nullptr, 't', "event_type",
[&](String event_type) {
seen_event_type_arg = true;
if (event_type == "sample")
event_mask |= PERF_EVENT_SAMPLE;
else if (event_type == "context_switch")
event_mask |= PERF_EVENT_CONTEXT_SWITCH;
else if (event_type == "kmalloc")
event_mask |= PERF_EVENT_KMALLOC;
else if (event_type == "kfree")
event_mask |= PERF_EVENT_KFREE;
else if (event_type == "page_fault")
event_mask |= PERF_EVENT_PAGE_FAULT;
else if (event_type == "syscall")
event_mask |= PERF_EVENT_SYSCALL;
else {
warnln("Unknown event type '{}' specified.", event_type);
exit(1);
}
return true;
} });
auto print_types = [] {
outln();
outln("Event type can be one of: sample, context_switch, page_fault, syscall, kmalloc and kfree.");
};
if (!args_parser.parse(argc, argv, Core::ArgsParser::FailureBehavior::PrintUsage)) {
print_types();
exit(1);
}
if (!pid_argument && !cmd_argument && !all_processes) {
args_parser.print_usage(stdout, argv[0]);
print_types();
return 0;
}
if (!seen_event_type_arg)
event_mask |= PERF_EVENT_SAMPLE;
if (pid_argument || all_processes) {
if (!(enable ^ disable ^ wait ^ free)) {
warnln("-p <PID> requires -e xor -d xor -w xor -f.");
return 1;
}
pid_t pid = all_processes ? -1 : atoi(pid_argument);
if (wait || enable) {
if (profiling_enable(pid, event_mask) < 0) {
perror("profiling_enable");
return 1;
}
if (!wait)
return 0;
}
if (wait) {
outln("Profiling enabled, waiting for user input to disable...");
(void)getchar();
}
if (wait || disable) {
if (profiling_disable(pid) < 0) {
perror("profiling_disable");
return 1;
}
outln("Profiling disabled.");
}
if (free && profiling_free_buffer(pid) < 0) {
perror("profiling_disable");
return 1;
}
return 0;
}
auto cmd_parts = String(cmd_argument).split(' ');
Vector<const char*> cmd_argv;
for (auto& part : cmd_parts)
cmd_argv.append(part.characters());
cmd_argv.append(nullptr);
dbgln("Enabling profiling for PID {}", getpid());
profiling_enable(getpid(), event_mask);
if (execvp(cmd_argv[0], const_cast<char**>(cmd_argv.data())) < 0) {
perror("execv");
return 1;
}
return 0;
}
|
