/* * Input and output from/to gmon.out files. */ #include "cg_arcs.h" #include "basic_blocks.h" #include "bfd.h" #include "core.h" #include "call_graph.h" #include "gmon_io.h" #include "gmon_out.h" #include "gmon.h" /* fetch header for old format */ #include "gprof.h" #include "hertz.h" #include "hist.h" #include "libiberty.h" int gmon_input = 0; int gmon_file_version = 0; /* 0 == old (non-versioned) file format */ /* * This probably ought to be in libbfd. */ bfd_vma DEFUN (get_vma, (abfd, addr), bfd * abfd AND bfd_byte * addr) { switch (sizeof (char*)) { case 4: return bfd_get_32 (abfd, addr); case 8: return bfd_get_64 (abfd, addr); default: fprintf (stderr, "%s: bfd_vma has unexpected size of %ld bytes\n", whoami, (long) sizeof (char*)); done (1); } } /* * This probably ought to be in libbfd. */ void DEFUN (put_vma, (abfd, val, addr), bfd * abfd AND bfd_vma val AND bfd_byte * addr) { switch (sizeof (char*)) { case 4: bfd_put_32 (abfd, val, addr); break; case 8: bfd_put_64 (abfd, val, addr); break; default: fprintf (stderr, "%s: bfd_vma has unexpected size of %ld bytes\n", whoami, (long) sizeof (char*)); done (1); } } void DEFUN (gmon_out_read, (filename), const char *filename) { FILE *ifp; struct gmon_hdr ghdr; unsigned char tag; int nhist = 0, narcs = 0, nbbs = 0; /* open gmon.out file: */ if (strcmp (filename, "-") == 0) { ifp = stdin; } else { ifp = fopen (filename, FOPEN_RB); if (!ifp) { perror (filename); done (1); } } if (fread (&ghdr, sizeof (struct gmon_hdr), 1, ifp) != 1) { fprintf (stderr, "%s: file too short to be a gmon file\n", filename); done (1); } if ((file_format == FF_MAGIC) || (file_format == FF_AUTO && !strncmp (&ghdr.cookie[0], GMON_MAGIC, 4))) { if (file_format == FF_MAGIC && strncmp (&ghdr.cookie[0], GMON_MAGIC, 4)) { fprintf (stderr, "%s: file `%s' has bad magic cookie\n", whoami, filename); done (1); } /* right magic, so it's probably really a new gmon.out file */ gmon_file_version = bfd_get_32 (core_bfd, (bfd_byte *) ghdr.version); if (gmon_file_version != GMON_VERSION && gmon_file_version != 0) { fprintf (stderr, "%s: file `%s' has unsupported version %d\n", whoami, filename, gmon_file_version); done (1); } /* read in all the records: */ while (fread (&tag, sizeof (tag), 1, ifp) == 1) { switch (tag) { case GMON_TAG_TIME_HIST: ++nhist; gmon_input |= INPUT_HISTOGRAM; hist_read_rec (ifp, filename); break; case GMON_TAG_CG_ARC: ++narcs; gmon_input |= INPUT_CALL_GRAPH; cg_read_rec (ifp, filename); break; case GMON_TAG_BB_COUNT: ++nbbs; gmon_input |= INPUT_BB_COUNTS; bb_read_rec (ifp, filename); break; default: fprintf (stderr, "%s: %s: found bad tag %d (file corrupted?)\n", whoami, filename, tag); done (1); } } } else if (file_format == FF_AUTO || file_format == FF_BSD) { struct hdr { bfd_vma low_pc; bfd_vma high_pc; int ncnt; }; int i, samp_bytes, count; bfd_vma from_pc, self_pc; struct raw_arc raw_arc; struct raw_phdr raw; static struct hdr h; UNIT raw_bin_count; struct hdr tmp; /* * Information from a gmon.out file is in two parts: an array of * sampling hits within pc ranges, and the arcs. */ gmon_input = INPUT_HISTOGRAM | INPUT_CALL_GRAPH; /* * This fseek() ought to work even on stdin as long as it's * not an interactive device (heck, is there anybody who would * want to type in a gmon.out at the terminal?). */ if (fseek (ifp, 0, SEEK_SET) < 0) { perror (filename); done (1); } if (fread (&raw, 1, sizeof (struct raw_phdr), ifp) != sizeof (struct raw_phdr)) { fprintf (stderr, "%s: file too short to be a gmon file\n", filename); done (1); } tmp.low_pc = get_vma (core_bfd, (bfd_byte *) & raw.low_pc[0]); tmp.high_pc = get_vma (core_bfd, (bfd_byte *) & raw.high_pc[0]); tmp.ncnt = bfd_get_32 (core_bfd, (bfd_byte *) & raw.ncnt[0]); if (s_highpc && (tmp.low_pc != h.low_pc || tmp.high_pc != h.high_pc || tmp.ncnt != h.ncnt)) { fprintf (stderr, "%s: incompatible with first gmon file\n", filename); done (1); } h = tmp; s_lowpc = (bfd_vma) h.low_pc; s_highpc = (bfd_vma) h.high_pc; lowpc = (bfd_vma) h.low_pc / sizeof (UNIT); highpc = (bfd_vma) h.high_pc / sizeof (UNIT); samp_bytes = h.ncnt - sizeof (struct raw_phdr); hist_num_bins = samp_bytes / sizeof (UNIT); DBG (SAMPLEDEBUG, printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx ncnt %d\n", h.low_pc, h.high_pc, h.ncnt); printf ("[gmon_out_read] s_lowpc 0x%lx s_highpc 0x%lx\n", s_lowpc, s_highpc); printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx\n", lowpc, highpc); printf ("[gmon_out_read] samp_bytes %d hist_num_bins %d\n", samp_bytes, hist_num_bins)); if (hist_num_bins) { ++nhist; } if (!hist_sample) { hist_sample = (int *) xmalloc (hist_num_bins * sizeof (hist_sample[0])); memset (hist_sample, 0, hist_num_bins * sizeof (hist_sample[0])); } for (i = 0; i < hist_num_bins; ++i) { if (fread (raw_bin_count, sizeof (raw_bin_count), 1, ifp) != 1) { fprintf (stderr, "%s: unexpected EOF after reading %d/%d bins\n", whoami, --i, hist_num_bins); done (1); } hist_sample[i] += bfd_get_16 (core_bfd, (bfd_byte *) raw_bin_count); } /* * The rest of the file consists of a bunch of <from,self,count> * tuples: */ while (fread (&raw_arc, sizeof (raw_arc), 1, ifp) == 1) { ++narcs; from_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.from_pc); self_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.self_pc); count = bfd_get_32 (core_bfd, (bfd_byte *) raw_arc.count); DBG (SAMPLEDEBUG, printf ("[gmon_out_read] frompc 0x%lx selfpc 0x%lx count %d\n", from_pc, self_pc, count)); /* add this arc: */ cg_tally (from_pc, self_pc, count); } fclose (ifp); if (hz == HZ_WRONG) { /* * How many ticks per second? If we can't tell, report * time in ticks. */ hz = hertz (); if (hz == HZ_WRONG) { hz = 1; fprintf (stderr, "time is in ticks, not seconds\n"); } } } else { fprintf (stderr, "%s: don't know how to deal with file format %d\n", whoami, file_format); done (1); } if (output_style & STYLE_GMON_INFO) { printf ("File `%s' (version %d) contains:\n", filename, gmon_file_version); printf ("\t%d histogram record%s\n", nhist, nhist == 1 ? "" : "s"); printf ("\t%d call-graph record%s\n", narcs, narcs == 1 ? "" : "s"); printf ("\t%d basic-block count record%s\n", nbbs, nbbs == 1 ? "" : "s"); first_output = FALSE; } } void DEFUN (gmon_out_write, (filename), const char *filename) { FILE *ofp; struct gmon_hdr ghdr; ofp = fopen (filename, FOPEN_WB); if (!ofp) { perror (filename); done (1); } if (file_format == FF_AUTO || file_format == FF_MAGIC) { /* write gmon header: */ memcpy (&ghdr.cookie[0], GMON_MAGIC, 4); bfd_put_32 (core_bfd, GMON_VERSION, (bfd_byte *) ghdr.version); if (fwrite (&ghdr, sizeof (ghdr), 1, ofp) != 1) { perror (filename); done (1); } /* write execution time histogram if we have one: */ if (gmon_input & INPUT_HISTOGRAM) { hist_write_hist (ofp, filename); } /* write call graph arcs if we have any: */ if (gmon_input & INPUT_CALL_GRAPH) { cg_write_arcs (ofp, filename); } /* write basic-block info if we have it: */ if (gmon_input & INPUT_BB_COUNTS) { bb_write_blocks (ofp, filename); } } else if (file_format == FF_BSD) { struct raw_arc raw_arc; UNIT raw_bin_count; bfd_vma lpc, hpc; int i, ncnt; Arc *arc; Sym *sym; put_vma (core_bfd, s_lowpc, (bfd_byte *) & lpc); put_vma (core_bfd, s_highpc, (bfd_byte *) & hpc); bfd_put_32 (core_bfd, hist_num_bins * sizeof (UNIT) + sizeof (struct raw_phdr), (bfd_byte *) & ncnt); /* write header: */ if (fwrite (&lpc, sizeof (lpc), 1, ofp) != 1 || fwrite (&hpc, sizeof (hpc), 1, ofp) != 1 || fwrite (&ncnt, sizeof (ncnt), 1, ofp) != 1) { perror (filename); done (1); } /* dump the samples: */ for (i = 0; i < hist_num_bins; ++i) { bfd_put_16 (core_bfd, hist_sample[i], (bfd_byte *) & raw_bin_count[0]); if (fwrite (&raw_bin_count[0], sizeof (raw_bin_count), 1, ofp) != 1) { perror (filename); done (1); } } /* dump the normalized raw arc information: */ for (sym = symtab.base; sym < symtab.limit; ++sym) { for (arc = sym->cg.children; arc; arc = arc->next_child) { put_vma (core_bfd, arc->parent->addr, (bfd_byte *) raw_arc.from_pc); put_vma (core_bfd, arc->child->addr, (bfd_byte *) raw_arc.self_pc); bfd_put_32 (core_bfd, arc->count, (bfd_byte *) raw_arc.count); if (fwrite (&raw_arc, sizeof (raw_arc), 1, ofp) != 1) { perror (filename); done (1); } DBG (SAMPLEDEBUG, printf ("[dumpsum] frompc 0x%lx selfpc 0x%lx count %d\n", arc->parent->addr, arc->child->addr, arc->count)); } } fclose (ofp); } else { fprintf (stderr, "%s: don't know how to deal with file format %d\n", whoami, file_format); done (1); } }