1 // SPDX-License-Identifier: GPL-2.0
2 /* For general debugging purposes */
11 #include <api/debug.h>
12 #include <linux/time64.h>
13 #ifdef HAVE_BACKTRACE_SUPPORT
20 #include "print_binary.h"
24 #include "sane_ctype.h"
27 bool dump_trace = false, quiet = false;
28 int debug_ordered_events;
29 static int redirect_to_stderr;
30 int debug_data_convert;
32 int veprintf(int level, int var, const char *fmt, va_list args)
37 if (use_browser >= 1 && !redirect_to_stderr)
38 ui_helpline__vshow(fmt, args);
40 ret = vfprintf(stderr, fmt, args);
46 int eprintf(int level, int var, const char *fmt, ...)
52 ret = veprintf(level, var, fmt, args);
58 static int veprintf_time(u64 t, const char *fmt, va_list args)
61 u64 secs, usecs, nsecs = t;
63 secs = nsecs / NSEC_PER_SEC;
64 nsecs -= secs * NSEC_PER_SEC;
65 usecs = nsecs / NSEC_PER_USEC;
67 ret = fprintf(stderr, "[%13" PRIu64 ".%06" PRIu64 "] ",
69 ret += vfprintf(stderr, fmt, args);
73 int eprintf_time(int level, int var, u64 t, const char *fmt, ...)
80 ret = veprintf_time(t, fmt, args);
88 * Overloading libtraceevent standard info print
89 * function, display with -v in perf.
91 void pr_stat(const char *fmt, ...)
96 veprintf(1, verbose, fmt, args);
98 eprintf(1, verbose, "\n");
101 int dump_printf(const char *fmt, ...)
108 ret = vprintf(fmt, args);
115 static void trace_event_printer(enum binary_printer_ops op,
116 unsigned int val, void *extra)
118 const char *color = PERF_COLOR_BLUE;
119 union perf_event *event = (union perf_event *)extra;
120 unsigned char ch = (unsigned char)val;
123 case BINARY_PRINT_DATA_BEGIN:
125 color_fprintf(stdout, color, "\n. ... raw event: size %d bytes\n",
128 case BINARY_PRINT_LINE_BEGIN:
131 case BINARY_PRINT_ADDR:
132 color_fprintf(stdout, color, " %04x: ", val);
134 case BINARY_PRINT_NUM_DATA:
135 color_fprintf(stdout, color, " %02x", val);
137 case BINARY_PRINT_NUM_PAD:
138 color_fprintf(stdout, color, " ");
140 case BINARY_PRINT_SEP:
141 color_fprintf(stdout, color, " ");
143 case BINARY_PRINT_CHAR_DATA:
144 color_fprintf(stdout, color, "%c",
145 isprint(ch) ? ch : '.');
147 case BINARY_PRINT_CHAR_PAD:
148 color_fprintf(stdout, color, " ");
150 case BINARY_PRINT_LINE_END:
151 color_fprintf(stdout, color, "\n");
153 case BINARY_PRINT_DATA_END:
161 void trace_event(union perf_event *event)
163 unsigned char *raw_event = (void *)event;
168 print_binary(raw_event, event->header.size, 16,
169 trace_event_printer, event);
172 static struct debug_variable {
175 } debug_variables[] = {
176 { .name = "verbose", .ptr = &verbose },
177 { .name = "ordered-events", .ptr = &debug_ordered_events},
178 { .name = "stderr", .ptr = &redirect_to_stderr},
179 { .name = "data-convert", .ptr = &debug_data_convert },
183 int perf_debug_option(const char *str)
185 struct debug_variable *var = &debug_variables[0];
186 char *vstr, *s = strdup(str);
189 vstr = strchr(s, '=');
194 if (!strcmp(s, var->name))
200 pr_err("Unknown debug variable name '%s'\n", s);
208 * Allow only values in range (0, 10),
211 v = (v < 0) || (v > 10) ? 0 : v;
222 int perf_quiet_option(void)
224 struct debug_variable *var = &debug_variables[0];
226 /* disable all debug messages */
236 #define DEBUG_WRAPPER(__n, __l) \
237 static int pr_ ## __n ## _wrapper(const char *fmt, ...) \
242 va_start(args, fmt); \
243 ret = veprintf(__l, verbose, fmt, args); \
248 DEBUG_WRAPPER(warning, 0);
249 DEBUG_WRAPPER(debug, 1);
251 void perf_debug_setup(void)
253 libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper);
256 /* Obtain a backtrace and print it to stdout. */
257 #ifdef HAVE_BACKTRACE_SUPPORT
258 void dump_stack(void)
261 size_t size = backtrace(array, ARRAY_SIZE(array));
262 char **strings = backtrace_symbols(array, size);
265 printf("Obtained %zd stack frames.\n", size);
267 for (i = 0; i < size; i++)
268 printf("%s\n", strings[i]);
273 void dump_stack(void) {}
276 void sighandler_dump_stack(int sig)
278 psignal(sig, "perf");
280 signal(sig, SIG_DFL);