1 // SPDX-License-Identifier: GPL-2.0
2 /* For general debugging purposes */
12 #include <api/debug.h>
13 #include <linux/time64.h>
14 #ifdef HAVE_BACKTRACE_SUPPORT
21 #include "print_binary.h"
25 #include <linux/ctype.h>
28 bool dump_trace = false, quiet = false;
29 int debug_ordered_events;
30 static int redirect_to_stderr;
31 int debug_data_convert;
33 int veprintf(int level, int var, const char *fmt, va_list args)
38 if (use_browser >= 1 && !redirect_to_stderr)
39 ui_helpline__vshow(fmt, args);
41 ret = vfprintf(stderr, fmt, args);
47 int eprintf(int level, int var, const char *fmt, ...)
53 ret = veprintf(level, var, fmt, args);
59 static int veprintf_time(u64 t, const char *fmt, va_list args)
62 u64 secs, usecs, nsecs = t;
64 secs = nsecs / NSEC_PER_SEC;
65 nsecs -= secs * NSEC_PER_SEC;
66 usecs = nsecs / NSEC_PER_USEC;
68 ret = fprintf(stderr, "[%13" PRIu64 ".%06" PRIu64 "] ",
70 ret += vfprintf(stderr, fmt, args);
74 int eprintf_time(int level, int var, u64 t, const char *fmt, ...)
81 ret = veprintf_time(t, fmt, args);
89 * Overloading libtraceevent standard info print
90 * function, display with -v in perf.
92 void pr_stat(const char *fmt, ...)
97 veprintf(1, verbose, fmt, args);
99 eprintf(1, verbose, "\n");
102 int dump_printf(const char *fmt, ...)
109 ret = vprintf(fmt, args);
116 static int trace_event_printer(enum binary_printer_ops op,
117 unsigned int val, void *extra, FILE *fp)
119 const char *color = PERF_COLOR_BLUE;
120 union perf_event *event = (union perf_event *)extra;
121 unsigned char ch = (unsigned char)val;
125 case BINARY_PRINT_DATA_BEGIN:
126 printed += fprintf(fp, ".");
127 printed += color_fprintf(fp, color, "\n. ... raw event: size %d bytes\n",
130 case BINARY_PRINT_LINE_BEGIN:
131 printed += fprintf(fp, ".");
133 case BINARY_PRINT_ADDR:
134 printed += color_fprintf(fp, color, " %04x: ", val);
136 case BINARY_PRINT_NUM_DATA:
137 printed += color_fprintf(fp, color, " %02x", val);
139 case BINARY_PRINT_NUM_PAD:
140 printed += color_fprintf(fp, color, " ");
142 case BINARY_PRINT_SEP:
143 printed += color_fprintf(fp, color, " ");
145 case BINARY_PRINT_CHAR_DATA:
146 printed += color_fprintf(fp, color, "%c",
147 isprint(ch) ? ch : '.');
149 case BINARY_PRINT_CHAR_PAD:
150 printed += color_fprintf(fp, color, " ");
152 case BINARY_PRINT_LINE_END:
153 printed += color_fprintf(fp, color, "\n");
155 case BINARY_PRINT_DATA_END:
156 printed += fprintf(fp, "\n");
165 void trace_event(union perf_event *event)
167 unsigned char *raw_event = (void *)event;
172 print_binary(raw_event, event->header.size, 16,
173 trace_event_printer, event);
176 static struct debug_variable {
179 } debug_variables[] = {
180 { .name = "verbose", .ptr = &verbose },
181 { .name = "ordered-events", .ptr = &debug_ordered_events},
182 { .name = "stderr", .ptr = &redirect_to_stderr},
183 { .name = "data-convert", .ptr = &debug_data_convert },
187 int perf_debug_option(const char *str)
189 struct debug_variable *var = &debug_variables[0];
190 char *vstr, *s = strdup(str);
193 vstr = strchr(s, '=');
198 if (!strcmp(s, var->name))
204 pr_err("Unknown debug variable name '%s'\n", s);
212 * Allow only values in range (0, 10),
215 v = (v < 0) || (v > 10) ? 0 : v;
226 int perf_quiet_option(void)
228 struct debug_variable *var = &debug_variables[0];
230 /* disable all debug messages */
239 #define DEBUG_WRAPPER(__n, __l) \
240 static int pr_ ## __n ## _wrapper(const char *fmt, ...) \
245 va_start(args, fmt); \
246 ret = veprintf(__l, verbose, fmt, args); \
251 DEBUG_WRAPPER(warning, 0);
252 DEBUG_WRAPPER(debug, 1);
254 void perf_debug_setup(void)
256 libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper);
259 /* Obtain a backtrace and print it to stdout. */
260 #ifdef HAVE_BACKTRACE_SUPPORT
261 void dump_stack(void)
264 size_t size = backtrace(array, ARRAY_SIZE(array));
265 char **strings = backtrace_symbols(array, size);
268 printf("Obtained %zd stack frames.\n", size);
270 for (i = 0; i < size; i++)
271 printf("%s\n", strings[i]);
276 void dump_stack(void) {}
279 void sighandler_dump_stack(int sig)
281 psignal(sig, "perf");
283 signal(sig, SIG_DFL);