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1// SPDX-License-Identifier: GPL-2.0
2/* For general debugging purposes */
3
4#include <inttypes.h>
5#include <string.h>
6#include <stdarg.h>
7#include <stdio.h>
8#include <stdlib.h>
9#include <sys/wait.h>
10#include <api/debug.h>
11#include <linux/kernel.h>
12#include <linux/time64.h>
13#include <sys/time.h>
14#ifdef HAVE_BACKTRACE_SUPPORT
15#include <execinfo.h>
16#endif
17#include "color.h"
18#include "event.h"
19#include "debug.h"
20#include "print_binary.h"
21#include "target.h"
22#include "trace-event.h"
23#include "ui/helpline.h"
24#include "ui/ui.h"
25#include "util/parse-sublevel-options.h"
26
27#include <linux/ctype.h>
28
29#ifdef HAVE_LIBTRACEEVENT
30#include <traceevent/event-parse.h>
31#else
32#define LIBTRACEEVENT_VERSION 0
33#endif
34
35int verbose;
36int debug_kmaps;
37int debug_peo_args;
38bool dump_trace = false, quiet = false;
39int debug_ordered_events;
40static int redirect_to_stderr;
41int debug_data_convert;
42static FILE *_debug_file;
43bool debug_display_time;
44
45FILE *debug_file(void)
46{
47 if (!_debug_file) {
48 pr_warning_once("debug_file not set");
49 debug_set_file(stderr);
50 }
51 return _debug_file;
52}
53
54void debug_set_file(FILE *file)
55{
56 _debug_file = file;
57}
58
59void debug_set_display_time(bool set)
60{
61 debug_display_time = set;
62}
63
64static int fprintf_time(FILE *file)
65{
66 struct timeval tod;
67 struct tm ltime;
68 char date[64];
69
70 if (!debug_display_time)
71 return 0;
72
73 if (gettimeofday(&tod, NULL) != 0)
74 return 0;
75
76 if (localtime_r(&tod.tv_sec, <ime) == NULL)
77 return 0;
78
79 strftime(date, sizeof(date), "%F %H:%M:%S", <ime);
80 return fprintf(file, "[%s.%06lu] ", date, (long)tod.tv_usec);
81}
82
83int veprintf(int level, int var, const char *fmt, va_list args)
84{
85 int ret = 0;
86
87 if (var >= level) {
88 if (use_browser >= 1 && !redirect_to_stderr) {
89 ui_helpline__vshow(fmt, args);
90 } else {
91 ret = fprintf_time(debug_file());
92 ret += vfprintf(debug_file(), fmt, args);
93 }
94 }
95
96 return ret;
97}
98
99int eprintf(int level, int var, const char *fmt, ...)
100{
101 va_list args;
102 int ret;
103
104 va_start(args, fmt);
105 ret = veprintf(level, var, fmt, args);
106 va_end(args);
107
108 return ret;
109}
110
111static int veprintf_time(u64 t, const char *fmt, va_list args)
112{
113 int ret = 0;
114 u64 secs, usecs, nsecs = t;
115
116 secs = nsecs / NSEC_PER_SEC;
117 nsecs -= secs * NSEC_PER_SEC;
118 usecs = nsecs / NSEC_PER_USEC;
119
120 ret = fprintf(debug_file(), "[%13" PRIu64 ".%06" PRIu64 "] ", secs, usecs);
121 ret += vfprintf(debug_file(), fmt, args);
122 return ret;
123}
124
125int eprintf_time(int level, int var, u64 t, const char *fmt, ...)
126{
127 int ret = 0;
128 va_list args;
129
130 if (var >= level) {
131 va_start(args, fmt);
132 ret = veprintf_time(t, fmt, args);
133 va_end(args);
134 }
135
136 return ret;
137}
138
139/*
140 * Overloading libtraceevent standard info print
141 * function, display with -v in perf.
142 */
143void pr_stat(const char *fmt, ...)
144{
145 va_list args;
146
147 va_start(args, fmt);
148 veprintf(1, verbose, fmt, args);
149 va_end(args);
150 eprintf(1, verbose, "\n");
151}
152
153int dump_printf(const char *fmt, ...)
154{
155 va_list args;
156 int ret = 0;
157
158 if (dump_trace) {
159 va_start(args, fmt);
160 ret = vprintf(fmt, args);
161 va_end(args);
162 }
163
164 return ret;
165}
166
167static int trace_event_printer(enum binary_printer_ops op,
168 unsigned int val, void *extra, FILE *fp)
169{
170 const char *color = PERF_COLOR_BLUE;
171 union perf_event *event = (union perf_event *)extra;
172 unsigned char ch = (unsigned char)val;
173 int printed = 0;
174
175 switch (op) {
176 case BINARY_PRINT_DATA_BEGIN:
177 printed += fprintf(fp, ".");
178 printed += color_fprintf(fp, color, "\n. ... raw event: size %d bytes\n",
179 event->header.size);
180 break;
181 case BINARY_PRINT_LINE_BEGIN:
182 printed += fprintf(fp, ".");
183 break;
184 case BINARY_PRINT_ADDR:
185 printed += color_fprintf(fp, color, " %04x: ", val);
186 break;
187 case BINARY_PRINT_NUM_DATA:
188 printed += color_fprintf(fp, color, " %02x", val);
189 break;
190 case BINARY_PRINT_NUM_PAD:
191 printed += color_fprintf(fp, color, " ");
192 break;
193 case BINARY_PRINT_SEP:
194 printed += color_fprintf(fp, color, " ");
195 break;
196 case BINARY_PRINT_CHAR_DATA:
197 printed += color_fprintf(fp, color, "%c",
198 isprint(ch) && isascii(ch) ? ch : '.');
199 break;
200 case BINARY_PRINT_CHAR_PAD:
201 printed += color_fprintf(fp, color, " ");
202 break;
203 case BINARY_PRINT_LINE_END:
204 printed += color_fprintf(fp, color, "\n");
205 break;
206 case BINARY_PRINT_DATA_END:
207 printed += fprintf(fp, "\n");
208 break;
209 default:
210 break;
211 }
212
213 return printed;
214}
215
216void trace_event(union perf_event *event)
217{
218 unsigned char *raw_event = (void *)event;
219
220 if (!dump_trace)
221 return;
222
223 print_binary(raw_event, event->header.size, 16,
224 trace_event_printer, event);
225}
226
227static struct sublevel_option debug_opts[] = {
228 { .name = "verbose", .value_ptr = &verbose },
229 { .name = "ordered-events", .value_ptr = &debug_ordered_events},
230 { .name = "stderr", .value_ptr = &redirect_to_stderr},
231 { .name = "data-convert", .value_ptr = &debug_data_convert },
232 { .name = "perf-event-open", .value_ptr = &debug_peo_args },
233 { .name = "kmaps", .value_ptr = &debug_kmaps },
234 { .name = NULL, }
235};
236
237int perf_debug_option(const char *str)
238{
239 int ret;
240
241 ret = perf_parse_sublevel_options(str, debug_opts);
242 if (ret)
243 return ret;
244
245 /* Allow only verbose value in range (0, 10), otherwise set 0. */
246 verbose = (verbose < 0) || (verbose > 10) ? 0 : verbose;
247
248#if LIBTRACEEVENT_VERSION >= MAKE_LIBTRACEEVENT_VERSION(1, 3, 0)
249 if (verbose == 1)
250 tep_set_loglevel(TEP_LOG_INFO);
251 else if (verbose == 2)
252 tep_set_loglevel(TEP_LOG_DEBUG);
253 else if (verbose >= 3)
254 tep_set_loglevel(TEP_LOG_ALL);
255#endif
256 return 0;
257}
258
259int perf_quiet_option(void)
260{
261 struct sublevel_option *opt = &debug_opts[0];
262
263 /* disable all debug messages */
264 while (opt->name) {
265 *opt->value_ptr = -1;
266 opt++;
267 }
268
269 /* For debug variables that are used as bool types, set to 0. */
270 redirect_to_stderr = 0;
271 debug_peo_args = 0;
272 debug_kmaps = 0;
273
274 return 0;
275}
276
277#define DEBUG_WRAPPER(__n, __l) \
278static int pr_ ## __n ## _wrapper(const char *fmt, ...) \
279{ \
280 va_list args; \
281 int ret; \
282 \
283 va_start(args, fmt); \
284 ret = veprintf(__l, verbose, fmt, args); \
285 va_end(args); \
286 return ret; \
287}
288
289DEBUG_WRAPPER(warning, 0);
290DEBUG_WRAPPER(debug, 1);
291
292void perf_debug_setup(void)
293{
294 debug_set_file(stderr);
295 libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper);
296}
297
298/* Obtain a backtrace and print it to stdout. */
299#ifdef HAVE_BACKTRACE_SUPPORT
300void dump_stack(void)
301{
302 void *array[16];
303 size_t size = backtrace(array, ARRAY_SIZE(array));
304 char **strings = backtrace_symbols(array, size);
305 size_t i;
306
307 printf("Obtained %zd stack frames.\n", size);
308
309 for (i = 0; i < size; i++)
310 printf("%s\n", strings[i]);
311
312 free(strings);
313}
314#else
315void dump_stack(void) {}
316#endif
317
318void sighandler_dump_stack(int sig)
319{
320 psignal(sig, "perf");
321 dump_stack();
322 signal(sig, SIG_DFL);
323 raise(sig);
324}
1/* For general debugging purposes */
2
3#include "../perf.h"
4
5#include <string.h>
6#include <stdarg.h>
7#include <stdio.h>
8
9#include "cache.h"
10#include "color.h"
11#include "event.h"
12#include "debug.h"
13#include "util.h"
14
15int verbose;
16bool dump_trace = false, quiet = false;
17
18int eprintf(int level, const char *fmt, ...)
19{
20 va_list args;
21 int ret = 0;
22
23 if (verbose >= level) {
24 va_start(args, fmt);
25 if (use_browser > 0)
26 ret = ui_helpline__show_help(fmt, args);
27 else
28 ret = vfprintf(stderr, fmt, args);
29 va_end(args);
30 }
31
32 return ret;
33}
34
35int dump_printf(const char *fmt, ...)
36{
37 va_list args;
38 int ret = 0;
39
40 if (dump_trace) {
41 va_start(args, fmt);
42 ret = vprintf(fmt, args);
43 va_end(args);
44 }
45
46 return ret;
47}
48
49#ifdef NO_NEWT_SUPPORT
50void ui__warning(const char *format, ...)
51{
52 va_list args;
53
54 va_start(args, format);
55 vfprintf(stderr, format, args);
56 va_end(args);
57}
58#endif
59
60void ui__warning_paranoid(void)
61{
62 ui__warning("Permission error - are you root?\n"
63 "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n"
64 " -1 - Not paranoid at all\n"
65 " 0 - Disallow raw tracepoint access for unpriv\n"
66 " 1 - Disallow cpu events for unpriv\n"
67 " 2 - Disallow kernel profiling for unpriv\n");
68}
69
70void trace_event(union perf_event *event)
71{
72 unsigned char *raw_event = (void *)event;
73 const char *color = PERF_COLOR_BLUE;
74 int i, j;
75
76 if (!dump_trace)
77 return;
78
79 printf(".");
80 color_fprintf(stdout, color, "\n. ... raw event: size %d bytes\n",
81 event->header.size);
82
83 for (i = 0; i < event->header.size; i++) {
84 if ((i & 15) == 0) {
85 printf(".");
86 color_fprintf(stdout, color, " %04x: ", i);
87 }
88
89 color_fprintf(stdout, color, " %02x", raw_event[i]);
90
91 if (((i & 15) == 15) || i == event->header.size-1) {
92 color_fprintf(stdout, color, " ");
93 for (j = 0; j < 15-(i & 15); j++)
94 color_fprintf(stdout, color, " ");
95 for (j = i & ~15; j <= i; j++) {
96 color_fprintf(stdout, color, "%c",
97 isprint(raw_event[j]) ?
98 raw_event[j] : '.');
99 }
100 color_fprintf(stdout, color, "\n");
101 }
102 }
103 printf(".\n");
104}