tools/perf/util/debug.c

   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 #define NSECS_PER_SEC  1000000000ULL
  17 #define NSECS_PER_USEC 1000ULL
  18
  19 int verbose;
  20 bool dump_trace = false, quiet = false;
  21 int debug_ordered_events;
  22 static int redirect_to_stderr;
  23 int debug_data_convert;
  24
  25 static int _eprintf(int level, int var, const char *fmt, va_list args)
  26 {
  27         int ret = 0;
  28
  29         if (var >= level) {
  30                 if (use_browser >= 1 && !redirect_to_stderr)
  31                         ui_helpline__vshow(fmt, args);
  32                 else
  33                         ret = vfprintf(stderr, fmt, args);
  34         }
  35
  36         return ret;
  37 }
  38
  39 int veprintf(int level, int var, const char *fmt, va_list args)
  40 {
  41         return _eprintf(level, var, fmt, args);
  42 }
  43
  44 int eprintf(int level, int var, const char *fmt, ...)
  45 {
  46         va_list args;
  47         int ret;
  48
  49         va_start(args, fmt);
  50         ret = _eprintf(level, var, fmt, args);
  51         va_end(args);
  52
  53         return ret;
  54 }
  55
  56 static int __eprintf_time(u64 t, const char *fmt, va_list args)
  57 {
  58         int ret = 0;
  59         u64 secs, usecs, nsecs = t;
  60
  61         secs   = nsecs / NSECS_PER_SEC;
  62         nsecs -= secs  * NSECS_PER_SEC;
  63         usecs  = nsecs / NSECS_PER_USEC;
  64
  65         ret = fprintf(stderr, "[%13" PRIu64 ".%06" PRIu64 "] ",
  66                       secs, usecs);
  67         ret += vfprintf(stderr, fmt, args);
  68         return ret;
  69 }
  70
  71 int eprintf_time(int level, int var, u64 t, const char *fmt, ...)
  72 {
  73         int ret = 0;
  74         va_list args;
  75
  76         if (var >= level) {
  77                 va_start(args, fmt);
  78                 ret = __eprintf_time(t, fmt, args);
  79                 va_end(args);
  80         }
  81
  82         return ret;
  83 }
  84
  85 /*
  86  * Overloading libtraceevent standard info print
  87  * function, display with -v in perf.
  88  */
  89 void pr_stat(const char *fmt, ...)
  90 {
  91         va_list args;
  92
  93         va_start(args, fmt);
  94         _eprintf(1, verbose, fmt, args);
  95         va_end(args);
  96         eprintf(1, verbose, "\n");
  97 }
  98
  99 int dump_printf(const char *fmt, ...)
 100 {
 101         va_list args;
 102         int ret = 0;
 103
 104         if (dump_trace) {
 105                 va_start(args, fmt);
 106                 ret = vprintf(fmt, args);
 107                 va_end(args);
 108         }
 109
 110         return ret;
 111 }
 112
 113 void trace_event(union perf_event *event)
 114 {
 115         unsigned char *raw_event = (void *)event;
 116         const char *color = PERF_COLOR_BLUE;
 117         int i, j;
 118
 119         if (!dump_trace)
 120                 return;
 121
 122         printf(".");
 123         color_fprintf(stdout, color, "\n. ... raw event: size %d bytes\n",
 124                       event->header.size);
 125
 126         for (i = 0; i < event->header.size; i++) {
 127                 if ((i & 15) == 0) {
 128                         printf(".");
 129                         color_fprintf(stdout, color, "  %04x: ", i);
 130                 }
 131
 132                 color_fprintf(stdout, color, " %02x", raw_event[i]);
 133
 134                 if (((i & 15) == 15) || i == event->header.size-1) {
 135                         color_fprintf(stdout, color, "  ");
 136                         for (j = 0; j < 15-(i & 15); j++)
 137                                 color_fprintf(stdout, color, "   ");
 138                         for (j = i & ~15; j <= i; j++) {
 139                                 color_fprintf(stdout, color, "%c",
 140                                               isprint(raw_event[j]) ?
 141                                               raw_event[j] : '.');
 142                         }
 143                         color_fprintf(stdout, color, "\n");
 144                 }
 145         }
 146         printf(".\n");
 147 }
 148
 149 static struct debug_variable {
 150         const char *name;
 151         int *ptr;
 152 } debug_variables[] = {
 153         { .name = "verbose",            .ptr = &verbose },
 154         { .name = "ordered-events",     .ptr = &debug_ordered_events},
 155         { .name = "stderr",             .ptr = &redirect_to_stderr},
 156         { .name = "data-convert",       .ptr = &debug_data_convert },
 157         { .name = NULL, }
 158 };
 159
 160 int perf_debug_option(const char *str)
 161 {
 162         struct debug_variable *var = &debug_variables[0];
 163         char *vstr, *s = strdup(str);
 164         int v = 1;
 165
 166         vstr = strchr(s, '=');
 167         if (vstr)
 168                 *vstr++ = 0;
 169
 170         while (var->name) {
 171                 if (!strcmp(s, var->name))
 172                         break;
 173                 var++;
 174         }
 175
 176         if (!var->name) {
 177                 pr_err("Unknown debug variable name '%s'\n", s);
 178                 free(s);
 179                 return -1;
 180         }
 181
 182         if (vstr) {
 183                 v = atoi(vstr);
 184                 /*
 185                  * Allow only values in range (0, 10),
 186                  * otherwise set 0.
 187                  */
 188                 v = (v < 0) || (v > 10) ? 0 : v;
 189         }
 190
 191         *var->ptr = v;
 192         free(s);
 193         return 0;
 194 }