Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
16int verbose;
17bool dump_trace = false, quiet = false;
18
19static int _eprintf(int level, int var, const char *fmt, va_list args)
20{
21 int ret = 0;
22
23 if (var >= level) {
24 if (use_browser >= 1)
25 ui_helpline__vshow(fmt, args);
26 else
27 ret = vfprintf(stderr, fmt, args);
28 }
29
30 return ret;
31}
32
33int eprintf(int level, int var, const char *fmt, ...)
34{
35 va_list args;
36 int ret;
37
38 va_start(args, fmt);
39 ret = _eprintf(level, var, fmt, args);
40 va_end(args);
41
42 return ret;
43}
44
45/*
46 * Overloading libtraceevent standard info print
47 * function, display with -v in perf.
48 */
49void pr_stat(const char *fmt, ...)
50{
51 va_list args;
52
53 va_start(args, fmt);
54 _eprintf(1, verbose, fmt, args);
55 va_end(args);
56 eprintf(1, verbose, "\n");
57}
58
59int dump_printf(const char *fmt, ...)
60{
61 va_list args;
62 int ret = 0;
63
64 if (dump_trace) {
65 va_start(args, fmt);
66 ret = vprintf(fmt, args);
67 va_end(args);
68 }
69
70 return ret;
71}
72
73void trace_event(union perf_event *event)
74{
75 unsigned char *raw_event = (void *)event;
76 const char *color = PERF_COLOR_BLUE;
77 int i, j;
78
79 if (!dump_trace)
80 return;
81
82 printf(".");
83 color_fprintf(stdout, color, "\n. ... raw event: size %d bytes\n",
84 event->header.size);
85
86 for (i = 0; i < event->header.size; i++) {
87 if ((i & 15) == 0) {
88 printf(".");
89 color_fprintf(stdout, color, " %04x: ", i);
90 }
91
92 color_fprintf(stdout, color, " %02x", raw_event[i]);
93
94 if (((i & 15) == 15) || i == event->header.size-1) {
95 color_fprintf(stdout, color, " ");
96 for (j = 0; j < 15-(i & 15); j++)
97 color_fprintf(stdout, color, " ");
98 for (j = i & ~15; j <= i; j++) {
99 color_fprintf(stdout, color, "%c",
100 isprint(raw_event[j]) ?
101 raw_event[j] : '.');
102 }
103 color_fprintf(stdout, color, "\n");
104 }
105 }
106 printf(".\n");
107}
108
109static struct debug_variable {
110 const char *name;
111 int *ptr;
112} debug_variables[] = {
113 { .name = "verbose", .ptr = &verbose },
114 { .name = NULL, }
115};
116
117int perf_debug_option(const char *str)
118{
119 struct debug_variable *var = &debug_variables[0];
120 char *vstr, *s = strdup(str);
121 int v = 1;
122
123 vstr = strchr(s, '=');
124 if (vstr)
125 *vstr++ = 0;
126
127 while (var->name) {
128 if (!strcmp(s, var->name))
129 break;
130 var++;
131 }
132
133 if (!var->name) {
134 pr_err("Unknown debug variable name '%s'\n", s);
135 free(s);
136 return -1;
137 }
138
139 if (vstr) {
140 v = atoi(vstr);
141 /*
142 * Allow only values in range (0, 10),
143 * otherwise set 0.
144 */
145 v = (v < 0) || (v > 10) ? 0 : v;
146 }
147
148 *var->ptr = v;
149 free(s);
150 return 0;
151}