1 /* For general debugging purposes */
2
3 #include "../perf.h"
4
5 #include <string.h>
6 #include <stdarg.h>
7 #include <stdio.h>
8 #include <api/debug.h>
9 #include <linux/time64.h>
10
11 #include "cache.h"
12 #include "color.h"
13 #include "event.h"
14 #include "debug.h"
15 #include "util.h"
16 #include "target.h"
17
18 int verbose;
19 bool dump_trace = false, quiet = false;
20 int debug_ordered_events;
21 static int redirect_to_stderr;
22 int debug_data_convert;
23
veprintf(int level,int var,const char * fmt,va_list args)24 int veprintf(int level, int var, const char *fmt, va_list args)
25 {
26 int ret = 0;
27
28 if (var >= level) {
29 if (use_browser >= 1 && !redirect_to_stderr)
30 ui_helpline__vshow(fmt, args);
31 else
32 ret = vfprintf(stderr, fmt, args);
33 }
34
35 return ret;
36 }
37
eprintf(int level,int var,const char * fmt,...)38 int eprintf(int level, int var, const char *fmt, ...)
39 {
40 va_list args;
41 int ret;
42
43 va_start(args, fmt);
44 ret = veprintf(level, var, fmt, args);
45 va_end(args);
46
47 return ret;
48 }
49
veprintf_time(u64 t,const char * fmt,va_list args)50 static int veprintf_time(u64 t, const char *fmt, va_list args)
51 {
52 int ret = 0;
53 u64 secs, usecs, nsecs = t;
54
55 secs = nsecs / NSEC_PER_SEC;
56 nsecs -= secs * NSEC_PER_SEC;
57 usecs = nsecs / NSEC_PER_USEC;
58
59 ret = fprintf(stderr, "[%13" PRIu64 ".%06" PRIu64 "] ",
60 secs, usecs);
61 ret += vfprintf(stderr, fmt, args);
62 return ret;
63 }
64
eprintf_time(int level,int var,u64 t,const char * fmt,...)65 int eprintf_time(int level, int var, u64 t, const char *fmt, ...)
66 {
67 int ret = 0;
68 va_list args;
69
70 if (var >= level) {
71 va_start(args, fmt);
72 ret = veprintf_time(t, fmt, args);
73 va_end(args);
74 }
75
76 return ret;
77 }
78
79 /*
80 * Overloading libtraceevent standard info print
81 * function, display with -v in perf.
82 */
pr_stat(const char * fmt,...)83 void pr_stat(const char *fmt, ...)
84 {
85 va_list args;
86
87 va_start(args, fmt);
88 veprintf(1, verbose, fmt, args);
89 va_end(args);
90 eprintf(1, verbose, "\n");
91 }
92
dump_printf(const char * fmt,...)93 int dump_printf(const char *fmt, ...)
94 {
95 va_list args;
96 int ret = 0;
97
98 if (dump_trace) {
99 va_start(args, fmt);
100 ret = vprintf(fmt, args);
101 va_end(args);
102 }
103
104 return ret;
105 }
106
trace_event_printer(enum binary_printer_ops op,unsigned int val,void * extra)107 static void trace_event_printer(enum binary_printer_ops op,
108 unsigned int val, void *extra)
109 {
110 const char *color = PERF_COLOR_BLUE;
111 union perf_event *event = (union perf_event *)extra;
112 unsigned char ch = (unsigned char)val;
113
114 switch (op) {
115 case BINARY_PRINT_DATA_BEGIN:
116 printf(".");
117 color_fprintf(stdout, color, "\n. ... raw event: size %d bytes\n",
118 event->header.size);
119 break;
120 case BINARY_PRINT_LINE_BEGIN:
121 printf(".");
122 break;
123 case BINARY_PRINT_ADDR:
124 color_fprintf(stdout, color, " %04x: ", val);
125 break;
126 case BINARY_PRINT_NUM_DATA:
127 color_fprintf(stdout, color, " %02x", val);
128 break;
129 case BINARY_PRINT_NUM_PAD:
130 color_fprintf(stdout, color, " ");
131 break;
132 case BINARY_PRINT_SEP:
133 color_fprintf(stdout, color, " ");
134 break;
135 case BINARY_PRINT_CHAR_DATA:
136 color_fprintf(stdout, color, "%c",
137 isprint(ch) ? ch : '.');
138 break;
139 case BINARY_PRINT_CHAR_PAD:
140 color_fprintf(stdout, color, " ");
141 break;
142 case BINARY_PRINT_LINE_END:
143 color_fprintf(stdout, color, "\n");
144 break;
145 case BINARY_PRINT_DATA_END:
146 printf("\n");
147 break;
148 default:
149 break;
150 }
151 }
152
trace_event(union perf_event * event)153 void trace_event(union perf_event *event)
154 {
155 unsigned char *raw_event = (void *)event;
156
157 if (!dump_trace)
158 return;
159
160 print_binary(raw_event, event->header.size, 16,
161 trace_event_printer, event);
162 }
163
164 static struct debug_variable {
165 const char *name;
166 int *ptr;
167 } debug_variables[] = {
168 { .name = "verbose", .ptr = &verbose },
169 { .name = "ordered-events", .ptr = &debug_ordered_events},
170 { .name = "stderr", .ptr = &redirect_to_stderr},
171 { .name = "data-convert", .ptr = &debug_data_convert },
172 { .name = NULL, }
173 };
174
perf_debug_option(const char * str)175 int perf_debug_option(const char *str)
176 {
177 struct debug_variable *var = &debug_variables[0];
178 char *vstr, *s = strdup(str);
179 int v = 1;
180
181 vstr = strchr(s, '=');
182 if (vstr)
183 *vstr++ = 0;
184
185 while (var->name) {
186 if (!strcmp(s, var->name))
187 break;
188 var++;
189 }
190
191 if (!var->name) {
192 pr_err("Unknown debug variable name '%s'\n", s);
193 free(s);
194 return -1;
195 }
196
197 if (vstr) {
198 v = atoi(vstr);
199 /*
200 * Allow only values in range (0, 10),
201 * otherwise set 0.
202 */
203 v = (v < 0) || (v > 10) ? 0 : v;
204 }
205
206 *var->ptr = v;
207 free(s);
208 return 0;
209 }
210
211 #define DEBUG_WRAPPER(__n, __l) \
212 static int pr_ ## __n ## _wrapper(const char *fmt, ...) \
213 { \
214 va_list args; \
215 int ret; \
216 \
217 va_start(args, fmt); \
218 ret = veprintf(__l, verbose, fmt, args); \
219 va_end(args); \
220 return ret; \
221 }
222
223 DEBUG_WRAPPER(warning, 0);
224 DEBUG_WRAPPER(debug, 1);
225
perf_debug_setup(void)226 void perf_debug_setup(void)
227 {
228 libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper);
229 }
230