xref: /linux/tools/perf/util/debug.c (revision b889fcf63cb62e7fdb7816565e28f44dbe4a76a5)
1 /* For general debugging purposes */
2 
3 #include "../perf.h"
4 
5 #include <string.h>
6 #include <stdarg.h>
7 #include <stdio.h>
8 
9 #include "cache.h"
10 #include "color.h"
11 #include "event.h"
12 #include "debug.h"
13 #include "util.h"
14 #include "target.h"
15 
16 int verbose;
17 bool dump_trace = false, quiet = false;
18 
19 int eprintf(int level, const char *fmt, ...)
20 {
21 	va_list args;
22 	int ret = 0;
23 
24 	if (verbose >= level) {
25 		va_start(args, fmt);
26 		if (use_browser == 1)
27 			ret = ui_helpline__show_help(fmt, args);
28 		else if (use_browser == 2)
29 			ret = perf_gtk__show_helpline(fmt, args);
30 		else
31 			ret = vfprintf(stderr, fmt, args);
32 		va_end(args);
33 	}
34 
35 	return ret;
36 }
37 
38 int dump_printf(const char *fmt, ...)
39 {
40 	va_list args;
41 	int ret = 0;
42 
43 	if (dump_trace) {
44 		va_start(args, fmt);
45 		ret = vprintf(fmt, args);
46 		va_end(args);
47 	}
48 
49 	return ret;
50 }
51 
52 #if !defined(NEWT_SUPPORT) && !defined(GTK2_SUPPORT)
53 int ui__warning(const char *format, ...)
54 {
55 	va_list args;
56 
57 	va_start(args, format);
58 	vfprintf(stderr, format, args);
59 	va_end(args);
60 	return 0;
61 }
62 #endif
63 
64 int ui__error_paranoid(void)
65 {
66 	return ui__error("Permission error - are you root?\n"
67 		    "Consider tweaking /proc/sys/kernel/perf_event_paranoid:\n"
68 		    " -1 - Not paranoid at all\n"
69 		    "  0 - Disallow raw tracepoint access for unpriv\n"
70 		    "  1 - Disallow cpu events for unpriv\n"
71 		    "  2 - Disallow kernel profiling for unpriv\n");
72 }
73 
74 void trace_event(union perf_event *event)
75 {
76 	unsigned char *raw_event = (void *)event;
77 	const char *color = PERF_COLOR_BLUE;
78 	int i, j;
79 
80 	if (!dump_trace)
81 		return;
82 
83 	printf(".");
84 	color_fprintf(stdout, color, "\n. ... raw event: size %d bytes\n",
85 		      event->header.size);
86 
87 	for (i = 0; i < event->header.size; i++) {
88 		if ((i & 15) == 0) {
89 			printf(".");
90 			color_fprintf(stdout, color, "  %04x: ", i);
91 		}
92 
93 		color_fprintf(stdout, color, " %02x", raw_event[i]);
94 
95 		if (((i & 15) == 15) || i == event->header.size-1) {
96 			color_fprintf(stdout, color, "  ");
97 			for (j = 0; j < 15-(i & 15); j++)
98 				color_fprintf(stdout, color, "   ");
99 			for (j = i & ~15; j <= i; j++) {
100 				color_fprintf(stdout, color, "%c",
101 					      isprint(raw_event[j]) ?
102 					      raw_event[j] : '.');
103 			}
104 			color_fprintf(stdout, color, "\n");
105 		}
106 	}
107 	printf(".\n");
108 }
109