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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#include "target.h"
15
16int verbose;
17bool dump_trace = false, quiet = false;
18
19static int _eprintf(int level, const char *fmt, va_list args)
20{
21 int ret = 0;
22
23 if (verbose >= level) {
24 if (use_browser >= 1)
25 ui_helpline__vshow(fmt, args);
26 else
27 ret = vfprintf(stderr, fmt, args);
28 }
29
30 return ret;
31}
32
33int eprintf(int level, const char *fmt, ...)
34{
35 va_list args;
36 int ret;
37
38 va_start(args, fmt);
39 ret = _eprintf(level, fmt, args);
40 va_end(args);
41
42 return ret;
43}
44
45/*
46 * Overloading libtraceevent standard info print
47 * function, display with -v in perf.
48 */
49void pr_stat(const char *fmt, ...)
50{
51 va_list args;
52
53 va_start(args, fmt);
54 _eprintf(1, fmt, args);
55 va_end(args);
56 eprintf(1, "\n");
57}
58
59int dump_printf(const char *fmt, ...)
60{
61 va_list args;
62 int ret = 0;
63
64 if (dump_trace) {
65 va_start(args, fmt);
66 ret = vprintf(fmt, args);
67 va_end(args);
68 }
69
70 return ret;
71}
72
73void trace_event(union perf_event *event)
74{
75 unsigned char *raw_event = (void *)event;
76 const char *color = PERF_COLOR_BLUE;
77 int i, j;
78
79 if (!dump_trace)
80 return;
81
82 printf(".");
83 color_fprintf(stdout, color, "\n. ... raw event: size %d bytes\n",
84 event->header.size);
85
86 for (i = 0; i < event->header.size; i++) {
87 if ((i & 15) == 0) {
88 printf(".");
89 color_fprintf(stdout, color, " %04x: ", i);
90 }
91
92 color_fprintf(stdout, color, " %02x", raw_event[i]);
93
94 if (((i & 15) == 15) || i == event->header.size-1) {
95 color_fprintf(stdout, color, " ");
96 for (j = 0; j < 15-(i & 15); j++)
97 color_fprintf(stdout, color, " ");
98 for (j = i & ~15; j <= i; j++) {
99 color_fprintf(stdout, color, "%c",
100 isprint(raw_event[j]) ?
101 raw_event[j] : '.');
102 }
103 color_fprintf(stdout, color, "\n");
104 }
105 }
106 printf(".\n");
107}
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 <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;
44int debug_type_profile;
45
46FILE *debug_file(void)
47{
48 if (!_debug_file) {
49 pr_warning_once("debug_file not set");
50 debug_set_file(stderr);
51 }
52 return _debug_file;
53}
54
55void debug_set_file(FILE *file)
56{
57 _debug_file = file;
58}
59
60void debug_set_display_time(bool set)
61{
62 debug_display_time = set;
63}
64
65static int fprintf_time(FILE *file)
66{
67 struct timeval tod;
68 struct tm ltime;
69 char date[64];
70
71 if (!debug_display_time)
72 return 0;
73
74 if (gettimeofday(&tod, NULL) != 0)
75 return 0;
76
77 if (localtime_r(&tod.tv_sec, <ime) == NULL)
78 return 0;
79
80 strftime(date, sizeof(date), "%F %H:%M:%S", <ime);
81 return fprintf(file, "[%s.%06lu] ", date, (long)tod.tv_usec);
82}
83
84int veprintf(int level, int var, const char *fmt, va_list args)
85{
86 int ret = 0;
87
88 if (var >= level) {
89 if (use_browser >= 1 && !redirect_to_stderr) {
90 ui_helpline__vshow(fmt, args);
91 } else {
92 ret = fprintf_time(debug_file());
93 ret += vfprintf(debug_file(), fmt, args);
94 }
95 }
96
97 return ret;
98}
99
100int eprintf(int level, int var, const char *fmt, ...)
101{
102 va_list args;
103 int ret;
104
105 va_start(args, fmt);
106 ret = veprintf(level, var, fmt, args);
107 va_end(args);
108
109 return ret;
110}
111
112static int veprintf_time(u64 t, const char *fmt, va_list args)
113{
114 int ret = 0;
115 u64 secs, usecs, nsecs = t;
116
117 secs = nsecs / NSEC_PER_SEC;
118 nsecs -= secs * NSEC_PER_SEC;
119 usecs = nsecs / NSEC_PER_USEC;
120
121 ret = fprintf(debug_file(), "[%13" PRIu64 ".%06" PRIu64 "] ", secs, usecs);
122 ret += vfprintf(debug_file(), fmt, args);
123 return ret;
124}
125
126int eprintf_time(int level, int var, u64 t, const char *fmt, ...)
127{
128 int ret = 0;
129 va_list args;
130
131 if (var >= level) {
132 va_start(args, fmt);
133 ret = veprintf_time(t, fmt, args);
134 va_end(args);
135 }
136
137 return ret;
138}
139
140/*
141 * Overloading libtraceevent standard info print
142 * function, display with -v in perf.
143 */
144void pr_stat(const char *fmt, ...)
145{
146 va_list args;
147
148 va_start(args, fmt);
149 veprintf(1, verbose, fmt, args);
150 va_end(args);
151 eprintf(1, verbose, "\n");
152}
153
154int dump_printf(const char *fmt, ...)
155{
156 va_list args;
157 int ret = 0;
158
159 if (dump_trace) {
160 va_start(args, fmt);
161 ret = vprintf(fmt, args);
162 va_end(args);
163 }
164
165 return ret;
166}
167
168static int trace_event_printer(enum binary_printer_ops op,
169 unsigned int val, void *extra, FILE *fp)
170{
171 const char *color = PERF_COLOR_BLUE;
172 union perf_event *event = (union perf_event *)extra;
173 unsigned char ch = (unsigned char)val;
174 int printed = 0;
175
176 switch (op) {
177 case BINARY_PRINT_DATA_BEGIN:
178 printed += fprintf(fp, ".");
179 printed += color_fprintf(fp, color, "\n. ... raw event: size %d bytes\n",
180 event->header.size);
181 break;
182 case BINARY_PRINT_LINE_BEGIN:
183 printed += fprintf(fp, ".");
184 break;
185 case BINARY_PRINT_ADDR:
186 printed += color_fprintf(fp, color, " %04x: ", val);
187 break;
188 case BINARY_PRINT_NUM_DATA:
189 printed += color_fprintf(fp, color, " %02x", val);
190 break;
191 case BINARY_PRINT_NUM_PAD:
192 printed += color_fprintf(fp, color, " ");
193 break;
194 case BINARY_PRINT_SEP:
195 printed += color_fprintf(fp, color, " ");
196 break;
197 case BINARY_PRINT_CHAR_DATA:
198 printed += color_fprintf(fp, color, "%c",
199 isprint(ch) && isascii(ch) ? ch : '.');
200 break;
201 case BINARY_PRINT_CHAR_PAD:
202 printed += color_fprintf(fp, color, " ");
203 break;
204 case BINARY_PRINT_LINE_END:
205 printed += color_fprintf(fp, color, "\n");
206 break;
207 case BINARY_PRINT_DATA_END:
208 printed += fprintf(fp, "\n");
209 break;
210 default:
211 break;
212 }
213
214 return printed;
215}
216
217void trace_event(union perf_event *event)
218{
219 unsigned char *raw_event = (void *)event;
220
221 if (!dump_trace)
222 return;
223
224 print_binary(raw_event, event->header.size, 16,
225 trace_event_printer, event);
226}
227
228static struct sublevel_option debug_opts[] = {
229 { .name = "verbose", .value_ptr = &verbose },
230 { .name = "ordered-events", .value_ptr = &debug_ordered_events},
231 { .name = "stderr", .value_ptr = &redirect_to_stderr},
232 { .name = "data-convert", .value_ptr = &debug_data_convert },
233 { .name = "perf-event-open", .value_ptr = &debug_peo_args },
234 { .name = "kmaps", .value_ptr = &debug_kmaps },
235 { .name = "type-profile", .value_ptr = &debug_type_profile },
236 { .name = NULL, }
237};
238
239int perf_debug_option(const char *str)
240{
241 int ret;
242
243 ret = perf_parse_sublevel_options(str, debug_opts);
244 if (ret)
245 return ret;
246
247 /* Allow only verbose value in range (0, 10), otherwise set 0. */
248 verbose = (verbose < 0) || (verbose > 10) ? 0 : verbose;
249
250#if LIBTRACEEVENT_VERSION >= MAKE_LIBTRACEEVENT_VERSION(1, 3, 0)
251 if (verbose == 1)
252 tep_set_loglevel(TEP_LOG_INFO);
253 else if (verbose == 2)
254 tep_set_loglevel(TEP_LOG_DEBUG);
255 else if (verbose >= 3)
256 tep_set_loglevel(TEP_LOG_ALL);
257#endif
258 return 0;
259}
260
261int perf_quiet_option(void)
262{
263 struct sublevel_option *opt = &debug_opts[0];
264
265 /* disable all debug messages */
266 while (opt->name) {
267 *opt->value_ptr = -1;
268 opt++;
269 }
270
271 /* For debug variables that are used as bool types, set to 0. */
272 redirect_to_stderr = 0;
273 debug_peo_args = 0;
274 debug_kmaps = 0;
275 debug_type_profile = 0;
276
277 return 0;
278}
279
280#define DEBUG_WRAPPER(__n, __l) \
281static int pr_ ## __n ## _wrapper(const char *fmt, ...) \
282{ \
283 va_list args; \
284 int ret; \
285 \
286 va_start(args, fmt); \
287 ret = veprintf(__l, verbose, fmt, args); \
288 va_end(args); \
289 return ret; \
290}
291
292DEBUG_WRAPPER(warning, 0);
293DEBUG_WRAPPER(debug, 1);
294
295void perf_debug_setup(void)
296{
297 debug_set_file(stderr);
298 libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper);
299}
300
301/* Obtain a backtrace and print it to stdout. */
302#ifdef HAVE_BACKTRACE_SUPPORT
303void dump_stack(void)
304{
305 void *array[16];
306 size_t size = backtrace(array, ARRAY_SIZE(array));
307 char **strings = backtrace_symbols(array, size);
308 size_t i;
309
310 printf("Obtained %zd stack frames.\n", size);
311
312 for (i = 0; i < size; i++)
313 printf("%s\n", strings[i]);
314
315 free(strings);
316}
317#else
318void dump_stack(void) {}
319#endif
320
321void sighandler_dump_stack(int sig)
322{
323 psignal(sig, "perf");
324 dump_stack();
325 signal(sig, SIG_DFL);
326 raise(sig);
327}