1 // SPDX-License-Identifier: GPL-2.0
2 /* For general debugging purposes */
10 #include <api/debug.h>
11 #include <linux/kernel.h>
12 #include <linux/time64.h>
14 #ifdef HAVE_BACKTRACE_SUPPORT
20 #include "print_binary.h"
22 #include "trace-event.h"
23 #include "ui/helpline.h"
25 #include "util/parse-sublevel-options.h"
27 #include <linux/ctype.h>
29 #ifdef HAVE_LIBTRACEEVENT
30 #include <event-parse.h>
32 #define LIBTRACEEVENT_VERSION 0
38 bool dump_trace = false, quiet = false;
39 int debug_ordered_events;
40 static int redirect_to_stderr;
41 int debug_data_convert;
42 static FILE *_debug_file;
43 bool debug_display_time;
44 int debug_type_profile;
46 FILE *debug_file(void)
49 pr_warning_once("debug_file not set");
50 debug_set_file(stderr);
55 void debug_set_file(FILE *file)
60 void debug_set_display_time(bool set)
62 debug_display_time = set;
65 static int fprintf_time(FILE *file)
71 if (!debug_display_time)
74 if (gettimeofday(&tod, NULL) != 0)
77 if (localtime_r(&tod.tv_sec, <ime) == NULL)
80 strftime(date, sizeof(date), "%F %H:%M:%S", <ime);
81 return fprintf(file, "[%s.%06lu] ", date, (long)tod.tv_usec);
84 int veprintf(int level, int var, const char *fmt, va_list args)
89 if (use_browser >= 1 && !redirect_to_stderr) {
90 ui_helpline__vshow(fmt, args);
92 ret = fprintf_time(debug_file());
93 ret += vfprintf(debug_file(), fmt, args);
100 int eprintf(int level, int var, const char *fmt, ...)
106 ret = veprintf(level, var, fmt, args);
112 static int veprintf_time(u64 t, const char *fmt, va_list args)
115 u64 secs, usecs, nsecs = t;
117 secs = nsecs / NSEC_PER_SEC;
118 nsecs -= secs * NSEC_PER_SEC;
119 usecs = nsecs / NSEC_PER_USEC;
121 ret = fprintf(debug_file(), "[%13" PRIu64 ".%06" PRIu64 "] ", secs, usecs);
122 ret += vfprintf(debug_file(), fmt, args);
126 int eprintf_time(int level, int var, u64 t, const char *fmt, ...)
133 ret = veprintf_time(t, fmt, args);
141 * Overloading libtraceevent standard info print
142 * function, display with -v in perf.
144 void pr_stat(const char *fmt, ...)
149 veprintf(1, verbose, fmt, args);
151 eprintf(1, verbose, "\n");
154 int dump_printf(const char *fmt, ...)
161 ret = vprintf(fmt, args);
168 static int trace_event_printer(enum binary_printer_ops op,
169 unsigned int val, void *extra, FILE *fp)
171 const char *color = PERF_COLOR_BLUE;
172 union perf_event *event = (union perf_event *)extra;
173 unsigned char ch = (unsigned char)val;
177 case BINARY_PRINT_DATA_BEGIN:
178 printed += fprintf(fp, ".");
179 printed += color_fprintf(fp, color, "\n. ... raw event: size %d bytes\n",
182 case BINARY_PRINT_LINE_BEGIN:
183 printed += fprintf(fp, ".");
185 case BINARY_PRINT_ADDR:
186 printed += color_fprintf(fp, color, " %04x: ", val);
188 case BINARY_PRINT_NUM_DATA:
189 printed += color_fprintf(fp, color, " %02x", val);
191 case BINARY_PRINT_NUM_PAD:
192 printed += color_fprintf(fp, color, " ");
194 case BINARY_PRINT_SEP:
195 printed += color_fprintf(fp, color, " ");
197 case BINARY_PRINT_CHAR_DATA:
198 printed += color_fprintf(fp, color, "%c",
199 isprint(ch) && isascii(ch) ? ch : '.');
201 case BINARY_PRINT_CHAR_PAD:
202 printed += color_fprintf(fp, color, " ");
204 case BINARY_PRINT_LINE_END:
205 printed += color_fprintf(fp, color, "\n");
207 case BINARY_PRINT_DATA_END:
208 printed += fprintf(fp, "\n");
217 void trace_event(union perf_event *event)
219 unsigned char *raw_event = (void *)event;
224 print_binary(raw_event, event->header.size, 16,
225 trace_event_printer, event);
228 static 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 },
239 int perf_debug_option(const char *str)
243 ret = perf_parse_sublevel_options(str, debug_opts);
247 /* Allow only verbose value in range (0, 10), otherwise set 0. */
248 verbose = (verbose < 0) || (verbose > 10) ? 0 : verbose;
250 #if LIBTRACEEVENT_VERSION >= MAKE_LIBTRACEEVENT_VERSION(1, 3, 0)
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);
261 int perf_quiet_option(void)
263 struct sublevel_option *opt = &debug_opts[0];
265 /* disable all debug messages */
267 *opt->value_ptr = -1;
271 /* For debug variables that are used as bool types, set to 0. */
272 redirect_to_stderr = 0;
275 debug_type_profile = 0;
280 #define DEBUG_WRAPPER(__n, __l) \
281 static int pr_ ## __n ## _wrapper(const char *fmt, ...) \
286 va_start(args, fmt); \
287 ret = veprintf(__l, verbose, fmt, args); \
292 DEBUG_WRAPPER(warning, 0);
293 DEBUG_WRAPPER(debug, 1);
295 void perf_debug_setup(void)
297 debug_set_file(stderr);
298 libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper);
301 /* Obtain a backtrace and print it to stdout. */
302 #ifdef HAVE_BACKTRACE_SUPPORT
303 void dump_stack(void)
306 size_t size = backtrace(array, ARRAY_SIZE(array));
307 char **strings = backtrace_symbols(array, size);
310 printf("Obtained %zd stack frames.\n", size);
312 for (i = 0; i < size; i++)
313 printf("%s\n", strings[i]);
318 void dump_stack(void) {}
321 void sighandler_dump_stack(int sig)
323 psignal(sig, "perf");
325 signal(sig, SIG_DFL);