457 lines
11 KiB
C
457 lines
11 KiB
C
/*
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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 "corefile.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 (char*))
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{
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case 4:
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return bfd_get_32 (abfd, addr);
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case 8:
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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 (char*));
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done (1);
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}
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}
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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 (char*))
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{
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case 4:
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bfd_put_32 (abfd, val, addr);
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break;
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case 8:
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bfd_put_64 (abfd, val, addr);
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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 (char*));
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done (1);
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}
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}
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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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{
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ifp = stdin;
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}
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else
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{
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ifp = fopen (filename, FOPEN_RB);
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if (!ifp)
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{
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perror (filename);
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done (1);
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}
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}
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if (fread (&ghdr, sizeof (struct gmon_hdr), 1, ifp) != 1)
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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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}
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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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}
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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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{
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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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}
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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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{
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switch (tag)
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{
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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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}
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}
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}
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else if (file_format == FF_AUTO
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|| file_format == FF_BSD
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|| file_format == FF_BSD44)
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{
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struct hdr
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{
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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, header_size;
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unsigned long 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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{
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perror (filename);
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done (1);
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}
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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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}
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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 (bfd_get_32 (core_bfd, (bfd_byte *) &raw.version[0])
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== GMONVERSION)
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{
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int profrate;
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/* 4.4BSD format header. */
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profrate = bfd_get_32 (core_bfd, (bfd_byte *) &raw.profrate[0]);
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if (!s_highpc)
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hz = profrate;
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else if (hz != profrate)
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{
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fprintf (stderr,
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_("%s: profiling rate incompatible with first gmon file\n"),
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filename);
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done (1);
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}
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header_size = sizeof (struct raw_phdr);
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}
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else
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{
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/* old style BSD format. */
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if (file_format == FF_BSD44)
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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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}
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if (fseek (ifp, sizeof (struct old_raw_phdr), SEEK_SET) < 0)
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{
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perror (filename);
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done (1);
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}
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header_size = sizeof (struct old_raw_phdr);
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}
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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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}
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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 - header_size;
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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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(unsigned long) h.low_pc, (unsigned long) h.high_pc,
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h.ncnt);
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printf ("[gmon_out_read] s_lowpc 0x%lx s_highpc 0x%lx\n",
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(unsigned long) s_lowpc, (unsigned long) s_highpc);
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printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx\n",
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(unsigned long) lowpc, (unsigned long) 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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{
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++nhist;
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}
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if (!hist_sample)
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{
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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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}
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for (i = 0; i < hist_num_bins; ++i)
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{
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if (fread (raw_bin_count, sizeof (raw_bin_count), 1, ifp) != 1)
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{
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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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}
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hist_sample[i] += bfd_get_16 (core_bfd, (bfd_byte *) raw_bin_count);
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}
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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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{
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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 %lu\n",
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(unsigned long) from_pc, (unsigned long) 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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}
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fclose (ifp);
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if (hz == HZ_WRONG)
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{
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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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{
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hz = 1;
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fprintf (stderr, _("time is in ticks, not seconds\n"));
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}
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}
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}
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else
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{
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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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}
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if (output_style & STYLE_GMON_INFO)
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{
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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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}
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}
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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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{
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perror (filename);
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done (1);
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}
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if (file_format == FF_AUTO || file_format == FF_MAGIC)
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{
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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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{
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perror (filename);
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done (1);
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}
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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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{
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hist_write_hist (ofp, filename);
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}
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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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{
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cg_write_arcs (ofp, filename);
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}
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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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{
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bb_write_blocks (ofp, filename);
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}
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}
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else if (file_format == FF_BSD || file_format == FF_BSD44)
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{
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struct raw_arc raw_arc;
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UNIT raw_bin_count;
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struct raw_phdr h;
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int i;
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Arc *arc;
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Sym *sym;
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memset (&h, 0, sizeof h);
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put_vma (core_bfd, s_lowpc, (bfd_byte *) &h.low_pc);
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put_vma (core_bfd, s_highpc, (bfd_byte *) &h.high_pc);
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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 *) &h.ncnt);
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/* Write header. Use new style BSD format is explicitly
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specified, or if the profiling rate is non-standard;
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otherwise, use the old BSD format. */
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if (file_format == FF_BSD44
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|| hz != hertz ())
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{
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bfd_put_32 (core_bfd, GMONVERSION, (bfd_byte *) &h.version);
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bfd_put_32 (core_bfd, hz, (bfd_byte *) &h.profrate);
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if (fwrite (&h, sizeof (struct raw_phdr), 1, ofp) != 1)
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{
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perror (filename);
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done (1);
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}
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}
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else
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{
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if (fwrite (&h, sizeof (struct old_raw_phdr), 1, ofp) != 1)
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{
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perror (filename);
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done (1);
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}
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}
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/* dump the samples: */
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for (i = 0; i < hist_num_bins; ++i)
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{
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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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}
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}
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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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{
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for (arc = sym->cg.children; arc; arc = arc->next_child)
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{
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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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{
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perror (filename);
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done (1);
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}
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DBG (SAMPLEDEBUG,
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printf ("[dumpsum] frompc 0x%lx selfpc 0x%lx count %lu\n",
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(unsigned long) arc->parent->addr,
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(unsigned long) arc->child->addr, arc->count));
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}
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}
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fclose (ofp);
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}
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else
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{
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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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}
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}
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