util/genprof/genprof.c

   1 #include <stdio.h>
   2 #include <uthash.h>
   3 #include <sys/gmon_out.h>
   4 #include <stdlib.h>
   5
   6 #define GMON_SEC "seconds        s"
   7 uint32_t mineip = 0xffffffff;
   8 uint32_t maxeip = 0;
   9
  10 /* a hash structure to hold the arc */
  11 struct arec {
  12         uint32_t eip;
  13         uint32_t from;
  14         uint32_t count;
  15         UT_hash_handle hh;
  16 };
  17
  18 struct arec *arc = NULL;
  19
  20 void note_arc(uint32_t eip, uint32_t from)
  21 {
  22         struct arec *s;
  23
  24         HASH_FIND_INT(arc, &eip, s);
  25         if (s == NULL) {
  26                 s = malloc(sizeof(struct arec));
  27                 s->eip = eip;
  28                 s->from = from;
  29                 s->count = 1;
  30                 if (eip > maxeip)
  31                         maxeip = eip;
  32                 if (eip < mineip)
  33                         maxeip = eip;
  34
  35                 HASH_ADD_INT(arc, eip, s);
  36         } else {
  37                 s->count++;
  38         }
  39 }
  40
  41 int main(int argc, char* argv[])
  42 {
  43         FILE *f, *fo;
  44         struct arec *s;
  45         uint32_t eip, from, tmp;
  46         uint8_t tag;
  47         uint16_t hit;
  48
  49         if (argc != 2) {
  50                 fprintf(stderr, "Please specify the coreboot trace log as parameter\n");
  51                 return 1;
  52         }
  53
  54         f = fopen(argv[1], "r");
  55         if (f == NULL) {
  56                 perror("Unable to open the input file");
  57                 return 1;
  58         }
  59
  60         fo = fopen("gmon.out", "w+");
  61         if (fo == NULL) {
  62                 perror("Unable to open the output file");
  63                 fclose(f);
  64                 return 1;
  65         }
  66
  67         while (!feof(f)) {
  68                 if (fscanf(f, "~%x(%x)%*[^\n]\n", &eip, &from) == 2) {
  69                         note_arc(eip, from);
  70                 } else if (fscanf(f, "%*c~%x(%x)%*[^\n]\n", &eip, &from) == 2) {
  71                         note_arc(eip, from);
  72                 } else {
  73                         /* just drop a line */
  74                         tmp = fscanf(f, "%*[^\n]\n");
  75                 }
  76         }
  77
  78         /* write gprof header */
  79         fwrite(GMON_MAGIC, 1, sizeof(GMON_MAGIC) - 1, fo);
  80         tmp = GMON_VERSION;
  81         fwrite(&tmp, 1, sizeof(tmp), fo);
  82         tmp = 0;
  83         fwrite(&tmp, 1, sizeof(tmp), fo);
  84         fwrite(&tmp, 1, sizeof(tmp), fo);
  85         fwrite(&tmp, 1, sizeof(tmp), fo);
  86         /* write fake histogram */
  87         tag = GMON_TAG_TIME_HIST;
  88         fwrite(&tag, 1, sizeof(tag), fo);
  89         fwrite(&mineip, 1, sizeof(mineip), fo);
  90         fwrite(&maxeip, 1, sizeof(maxeip), fo);
  91         /* size of histogram */
  92         tmp = 1;
  93         fwrite(&tmp, 1, sizeof(tmp), fo);
  94         /* prof rate */
  95         tmp = 1000;
  96         fwrite(&tmp, 1, sizeof(tmp), fo);
  97         fwrite(GMON_SEC, 1, sizeof(GMON_SEC) - 1, fo);
  98         hit = 1;
  99         fwrite(&hit, 1, sizeof(hit), fo);
 100
 101         /* write call graph data */
 102         tag = GMON_TAG_CG_ARC;
 103         for (s = arc; s != NULL; s = s->hh.next) {
 104                 fwrite(&tag, 1, sizeof(tag), fo);
 105                 fwrite(&s->from, 1, sizeof(s->from), fo);
 106                 fwrite(&s->eip, 1, sizeof(s->eip), fo);
 107                 fwrite(&s->count, 1, sizeof(s->count), fo);
 108         }
 109
 110         fclose(fo);
 111         fclose(f);
 112
 113         return 0;
 114 }