Profiling with gprof

[kolaaaa2]

Hi,
I have try profiling with trunk/pspsdk/src/prof, but can't make it works with the current toolchain (old gmon.out format ?).
After a look at gprof sources, I made some modifications in prof.c file. I don't know much about gprof, but here's a patch that works for me :

Code: Select all

--- prof.c.ori	2008-12-09 14:44:50.000000000 +0100
+++ prof.c	2008-12-09 15:06:09.000000000 +0100
@@ -26,12 +26,19 @@
 /** gmon.out file header */
 struct gmonhdr 
 {
+        char cookie[4];
+        char version[4];
+        char spare[3*4];
+};
+
+struct gmonhisthdr 
+{
         int lpc;        /* lowest pc address */
         int hpc;        /* highest pc address */
         int ncnt;       /* size of samples + size of header */
-        int version;    /* version number */
         int profrate;   /* profiling clock rate */
-        int resv[3];    /* reserved */
+        char dimension[15];
+        char abbrev;
 };
 
 /** frompc -> selfpc graph */
@@ -55,7 +62,7 @@
         struct rawarc *arcs;
 
         int nsamples;
-        unsigned int *samples;
+        unsigned short int *samples;
 
         int timer;
         
@@ -110,7 +117,7 @@
         }
 
         gp.nsamples = (gp.textsize + gp.hashfraction - 1) / gp.hashfraction;
-        gp.samples = (unsigned int *)malloc(sizeof(unsigned int) * gp.nsamples);
+        gp.samples = (unsigned short int *)malloc(sizeof(unsigned short int) * gp.nsamples);
         if (gp.samples == NULL)
         {
                 free(gp.arcs);
@@ -120,7 +127,7 @@
         }
 
         memset((void *)gp.arcs, '\0', gp.narcs * (sizeof(struct rawarc)));
-        memset((void *)gp.samples, '\0', gp.nsamples * (sizeof(unsigned int )));
+        memset((void *)gp.samples, '\0', gp.nsamples * (sizeof(unsigned short int )));
 
         gp.timer = sceKernelCreateVTimer("gprof timer", NULL);
 
@@ -161,6 +168,7 @@
         FILE *fp;
         int i;
         struct gmonhdr hdr;
+        struct gmonhisthdr histhdr;
 
         if (gp.state != GMON_PROF_ON)
         {
@@ -174,21 +182,29 @@
         sceKernelStopVTimer(gp.timer);
 
         fp = fopen("gmon.out", "wb");
-        hdr.lpc = gp.lowpc;
-        hdr.hpc = gp.highpc;
-        hdr.ncnt = sizeof(hdr) + (sizeof(unsigned int) * gp.nsamples);
-        hdr.version = GMONVERSION;
-        hdr.profrate = SAMPLE_FREQ;
-        hdr.resv[0] = 0;
-        hdr.resv[1] = 0;
-        hdr.resv[2] = 0;
+
+        memset(&hdr, 0x00, sizeof(hdr));
+        memcpy(hdr.cookie, "gmon", 4);
+        hdr.version[0]=1;
         fwrite(&hdr, 1, sizeof(hdr), fp);
-        fwrite(gp.samples, gp.nsamples, sizeof(unsigned int), fp);
+
+        fputc(0x00, fp);    /* GMON_TAG_TIME_HIST */
+        memset(&histhdr, 0x00, sizeof(histhdr));
+        histhdr.lpc = gp.lowpc - gp.lowpc;
+        histhdr.hpc = gp.highpc - gp.lowpc;
+        histhdr.ncnt = gp.nsamples;
+        histhdr.profrate = SAMPLE_FREQ;
+        strcpy(histhdr.dimension, "seconds");
+        histhdr.abbrev = 's';
+        fwrite(&histhdr, 1, sizeof(histhdr), fp);
+        fwrite(gp.samples, gp.nsamples, sizeof(unsigned short int), fp);
+
 
         for &#40;i=0; i<gp.narcs; i++&#41;
         &#123;
                 if &#40;gp.arcs&#91;i&#93;.count > 0&#41;
                 &#123;
+                        fputc&#40;0x01, fp&#41;;    /* GMON_TAG_CG_ARC */
                         fwrite&#40;gp.arcs + i, sizeof&#40;struct rawarc&#41;, 1, fp&#41;;
                 &#125;
         &#125;
@@ -230,8 +246,8 @@
                 gp.pc = selfpc;
                 e = &#40;frompc - gp.lowpc&#41; / gp.hashfraction;
                 arc = gp.arcs + e;
-                arc->frompc = frompc;
-                arc->selfpc = selfpc;
+                arc->frompc = frompc - gp.lowpc;
+                arc->selfpc = selfpc - gp.lowpc;
                 arc->count++;
         &#125;
 &#125;

Regards,
kolaaaa