This source file includes following definitions.
- veprintf
- eprintf
- veprintf_time
- eprintf_time
- pr_stat
- dump_printf
- trace_event_printer
- trace_event
- perf_debug_option
- perf_quiet_option
- perf_debug_setup
- dump_stack
- dump_stack
- sighandler_dump_stack
1
2
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 #ifdef HAVE_BACKTRACE_SUPPORT
14 #include <execinfo.h>
15 #endif
16 #include "color.h"
17 #include "event.h"
18 #include "debug.h"
19 #include "print_binary.h"
20 #include "target.h"
21 #include "ui/helpline.h"
22 #include "ui/ui.h"
23
24 #include <linux/ctype.h>
25
26 int verbose;
27 bool dump_trace = false, quiet = false;
28 int debug_ordered_events;
29 static int redirect_to_stderr;
30 int debug_data_convert;
31
32 int veprintf(int level, int var, const char *fmt, va_list args)
33 {
34 int ret = 0;
35
36 if (var >= level) {
37 if (use_browser >= 1 && !redirect_to_stderr)
38 ui_helpline__vshow(fmt, args);
39 else
40 ret = vfprintf(stderr, fmt, args);
41 }
42
43 return ret;
44 }
45
46 int eprintf(int level, int var, const char *fmt, ...)
47 {
48 va_list args;
49 int ret;
50
51 va_start(args, fmt);
52 ret = veprintf(level, var, fmt, args);
53 va_end(args);
54
55 return ret;
56 }
57
58 static int veprintf_time(u64 t, const char *fmt, va_list args)
59 {
60 int ret = 0;
61 u64 secs, usecs, nsecs = t;
62
63 secs = nsecs / NSEC_PER_SEC;
64 nsecs -= secs * NSEC_PER_SEC;
65 usecs = nsecs / NSEC_PER_USEC;
66
67 ret = fprintf(stderr, "[%13" PRIu64 ".%06" PRIu64 "] ",
68 secs, usecs);
69 ret += vfprintf(stderr, fmt, args);
70 return ret;
71 }
72
73 int eprintf_time(int level, int var, u64 t, const char *fmt, ...)
74 {
75 int ret = 0;
76 va_list args;
77
78 if (var >= level) {
79 va_start(args, fmt);
80 ret = veprintf_time(t, fmt, args);
81 va_end(args);
82 }
83
84 return ret;
85 }
86
87
88
89
90
91 void pr_stat(const char *fmt, ...)
92 {
93 va_list args;
94
95 va_start(args, fmt);
96 veprintf(1, verbose, fmt, args);
97 va_end(args);
98 eprintf(1, verbose, "\n");
99 }
100
101 int dump_printf(const char *fmt, ...)
102 {
103 va_list args;
104 int ret = 0;
105
106 if (dump_trace) {
107 va_start(args, fmt);
108 ret = vprintf(fmt, args);
109 va_end(args);
110 }
111
112 return ret;
113 }
114
115 static int trace_event_printer(enum binary_printer_ops op,
116 unsigned int val, void *extra, FILE *fp)
117 {
118 const char *color = PERF_COLOR_BLUE;
119 union perf_event *event = (union perf_event *)extra;
120 unsigned char ch = (unsigned char)val;
121 int printed = 0;
122
123 switch (op) {
124 case BINARY_PRINT_DATA_BEGIN:
125 printed += fprintf(fp, ".");
126 printed += color_fprintf(fp, color, "\n. ... raw event: size %d bytes\n",
127 event->header.size);
128 break;
129 case BINARY_PRINT_LINE_BEGIN:
130 printed += fprintf(fp, ".");
131 break;
132 case BINARY_PRINT_ADDR:
133 printed += color_fprintf(fp, color, " %04x: ", val);
134 break;
135 case BINARY_PRINT_NUM_DATA:
136 printed += color_fprintf(fp, color, " %02x", val);
137 break;
138 case BINARY_PRINT_NUM_PAD:
139 printed += color_fprintf(fp, color, " ");
140 break;
141 case BINARY_PRINT_SEP:
142 printed += color_fprintf(fp, color, " ");
143 break;
144 case BINARY_PRINT_CHAR_DATA:
145 printed += color_fprintf(fp, color, "%c",
146 isprint(ch) ? ch : '.');
147 break;
148 case BINARY_PRINT_CHAR_PAD:
149 printed += color_fprintf(fp, color, " ");
150 break;
151 case BINARY_PRINT_LINE_END:
152 printed += color_fprintf(fp, color, "\n");
153 break;
154 case BINARY_PRINT_DATA_END:
155 printed += fprintf(fp, "\n");
156 break;
157 default:
158 break;
159 }
160
161 return printed;
162 }
163
164 void trace_event(union perf_event *event)
165 {
166 unsigned char *raw_event = (void *)event;
167
168 if (!dump_trace)
169 return;
170
171 print_binary(raw_event, event->header.size, 16,
172 trace_event_printer, event);
173 }
174
175 static struct debug_variable {
176 const char *name;
177 int *ptr;
178 } debug_variables[] = {
179 { .name = "verbose", .ptr = &verbose },
180 { .name = "ordered-events", .ptr = &debug_ordered_events},
181 { .name = "stderr", .ptr = &redirect_to_stderr},
182 { .name = "data-convert", .ptr = &debug_data_convert },
183 { .name = NULL, }
184 };
185
186 int perf_debug_option(const char *str)
187 {
188 struct debug_variable *var = &debug_variables[0];
189 char *vstr, *s = strdup(str);
190 int v = 1;
191
192 vstr = strchr(s, '=');
193 if (vstr)
194 *vstr++ = 0;
195
196 while (var->name) {
197 if (!strcmp(s, var->name))
198 break;
199 var++;
200 }
201
202 if (!var->name) {
203 pr_err("Unknown debug variable name '%s'\n", s);
204 free(s);
205 return -1;
206 }
207
208 if (vstr) {
209 v = atoi(vstr);
210
211
212
213
214 v = (v < 0) || (v > 10) ? 0 : v;
215 }
216
217 if (quiet)
218 v = -1;
219
220 *var->ptr = v;
221 free(s);
222 return 0;
223 }
224
225 int perf_quiet_option(void)
226 {
227 struct debug_variable *var = &debug_variables[0];
228
229
230 while (var->name) {
231 *var->ptr = -1;
232 var++;
233 }
234
235 return 0;
236 }
237
238 #define DEBUG_WRAPPER(__n, __l) \
239 static int pr_ ## __n ## _wrapper(const char *fmt, ...) \
240 { \
241 va_list args; \
242 int ret; \
243 \
244 va_start(args, fmt); \
245 ret = veprintf(__l, verbose, fmt, args); \
246 va_end(args); \
247 return ret; \
248 }
249
250 DEBUG_WRAPPER(warning, 0);
251 DEBUG_WRAPPER(debug, 1);
252
253 void perf_debug_setup(void)
254 {
255 libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper);
256 }
257
258
259 #ifdef HAVE_BACKTRACE_SUPPORT
260 void dump_stack(void)
261 {
262 void *array[16];
263 size_t size = backtrace(array, ARRAY_SIZE(array));
264 char **strings = backtrace_symbols(array, size);
265 size_t i;
266
267 printf("Obtained %zd stack frames.\n", size);
268
269 for (i = 0; i < size; i++)
270 printf("%s\n", strings[i]);
271
272 free(strings);
273 }
274 #else
275 void dump_stack(void) {}
276 #endif
277
278 void sighandler_dump_stack(int sig)
279 {
280 psignal(sig, "perf");
281 dump_stack();
282 signal(sig, SIG_DFL);
283 raise(sig);
284 }