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