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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - tools/perf/util/debug.c
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
);