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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [gprof/] [gmon_io.c] - Rev 144
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/* gmon_io.c - Input and output from/to gmon.out files. Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc. This file is part of GNU Binutils. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ #include "gprof.h" #include "binary-io.h" #include "search_list.h" #include "source.h" #include "symtab.h" #include "cg_arcs.h" #include "basic_blocks.h" #include "corefile.h" #include "call_graph.h" #include "gmon_io.h" #include "gmon_out.h" #include "gmon.h" /* Fetch header for old format. */ #include "hertz.h" #include "hist.h" #include "libiberty.h" enum gmon_ptr_size { ptr_32bit, ptr_64bit }; enum gmon_ptr_signedness { ptr_signed, ptr_unsigned }; static enum gmon_ptr_size gmon_get_ptr_size (void); static enum gmon_ptr_signedness gmon_get_ptr_signedness (void); #ifdef BFD_HOST_U_64_BIT static int gmon_io_read_64 (FILE *, BFD_HOST_U_64_BIT *); static int gmon_io_write_64 (FILE *, BFD_HOST_U_64_BIT); #endif static int gmon_read_raw_arc (FILE *, bfd_vma *, bfd_vma *, unsigned long *); static int gmon_write_raw_arc (FILE *, bfd_vma, bfd_vma, unsigned long); int gmon_input = 0; int gmon_file_version = 0; /* 0 == old (non-versioned) file format. */ static enum gmon_ptr_size gmon_get_ptr_size () { int size; /* Pick best size for pointers. Start with the ELF size, and if not elf go with the architecture's address size. */ size = bfd_get_arch_size (core_bfd); if (size == -1) size = bfd_arch_bits_per_address (core_bfd); switch (size) { case 32: return ptr_32bit; case 64: return ptr_64bit; default: fprintf (stderr, _("%s: address size has unexpected value of %u\n"), whoami, size); done (1); } } static enum gmon_ptr_signedness gmon_get_ptr_signedness () { int sext; /* Figure out whether to sign extend. If BFD doesn't know, assume no. */ sext = bfd_get_sign_extend_vma (core_bfd); if (sext == -1) return ptr_unsigned; return (sext ? ptr_signed : ptr_unsigned); } int gmon_io_read_32 (FILE *ifp, unsigned int *valp) { char buf[4]; if (fread (buf, 1, 4, ifp) != 4) return 1; *valp = bfd_get_32 (core_bfd, buf); return 0; } #ifdef BFD_HOST_U_64_BIT static int gmon_io_read_64 (FILE *ifp, BFD_HOST_U_64_BIT *valp) { char buf[8]; if (fread (buf, 1, 8, ifp) != 8) return 1; *valp = bfd_get_64 (core_bfd, buf); return 0; } #endif int gmon_io_read_vma (FILE *ifp, bfd_vma *valp) { unsigned int val32; #ifdef BFD_HOST_U_64_BIT BFD_HOST_U_64_BIT val64; #endif switch (gmon_get_ptr_size ()) { case ptr_32bit: if (gmon_io_read_32 (ifp, &val32)) return 1; if (gmon_get_ptr_signedness () == ptr_signed) *valp = (int) val32; else *valp = val32; break; #ifdef BFD_HOST_U_64_BIT case ptr_64bit: if (gmon_io_read_64 (ifp, &val64)) return 1; #ifdef BFD_HOST_64_BIT if (gmon_get_ptr_signedness () == ptr_signed) *valp = (BFD_HOST_64_BIT) val64; else #endif *valp = val64; break; #endif } return 0; } int gmon_io_read (FILE *ifp, char *buf, size_t n) { if (fread (buf, 1, n, ifp) != n) return 1; return 0; } int gmon_io_write_32 (FILE *ofp, unsigned int val) { char buf[4]; bfd_put_32 (core_bfd, (bfd_vma) val, buf); if (fwrite (buf, 1, 4, ofp) != 4) return 1; return 0; } #ifdef BFD_HOST_U_64_BIT static int gmon_io_write_64 (FILE *ofp, BFD_HOST_U_64_BIT val) { char buf[8]; bfd_put_64 (core_bfd, (bfd_vma) val, buf); if (fwrite (buf, 1, 8, ofp) != 8) return 1; return 0; } #endif int gmon_io_write_vma (FILE *ofp, bfd_vma val) { switch (gmon_get_ptr_size ()) { case ptr_32bit: if (gmon_io_write_32 (ofp, (unsigned int) val)) return 1; break; #ifdef BFD_HOST_U_64_BIT case ptr_64bit: if (gmon_io_write_64 (ofp, (BFD_HOST_U_64_BIT) val)) return 1; break; #endif } return 0; } int gmon_io_write_8 (FILE *ofp, unsigned int val) { char buf[1]; bfd_put_8 (core_bfd, val, buf); if (fwrite (buf, 1, 1, ofp) != 1) return 1; return 0; } int gmon_io_write (FILE *ofp, char *buf, size_t n) { if (fwrite (buf, 1, n, ofp) != n) return 1; return 0; } static int gmon_read_raw_arc (FILE *ifp, bfd_vma *fpc, bfd_vma *spc, unsigned long *cnt) { #ifdef BFD_HOST_U_64_BIT BFD_HOST_U_64_BIT cnt64; #endif unsigned int cnt32; if (gmon_io_read_vma (ifp, fpc) || gmon_io_read_vma (ifp, spc)) return 1; switch (gmon_get_ptr_size ()) { case ptr_32bit: if (gmon_io_read_32 (ifp, &cnt32)) return 1; *cnt = cnt32; break; #ifdef BFD_HOST_U_64_BIT case ptr_64bit: if (gmon_io_read_64 (ifp, &cnt64)) return 1; *cnt = cnt64; break; #endif default: return 1; } return 0; } static int gmon_write_raw_arc (FILE *ofp, bfd_vma fpc, bfd_vma spc, unsigned long cnt) { if (gmon_io_write_vma (ofp, fpc) || gmon_io_write_vma (ofp, spc)) return 1; switch (gmon_get_ptr_size ()) { case ptr_32bit: if (gmon_io_write_32 (ofp, (unsigned int) cnt)) return 1; break; #ifdef BFD_HOST_U_64_BIT case ptr_64bit: if (gmon_io_write_64 (ofp, (BFD_HOST_U_64_BIT) cnt)) return 1; break; #endif } return 0; } void gmon_out_read (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; SET_BINARY (fileno (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 || file_format == FF_BSD44) { struct hdr { bfd_vma low_pc; bfd_vma high_pc; unsigned int ncnt; }; unsigned int i; int samp_bytes, header_size = 0; unsigned long count; bfd_vma from_pc, self_pc; UNIT raw_bin_count; struct hdr tmp; unsigned int version; unsigned int hist_num_bins; /* 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); } /* The beginning of the old BSD header and the 4.4BSD header are the same: lowpc, highpc, ncnt */ if (gmon_io_read_vma (ifp, &tmp.low_pc) || gmon_io_read_vma (ifp, &tmp.high_pc) || gmon_io_read_32 (ifp, &tmp.ncnt)) { bad_gmon_file: fprintf (stderr, _("%s: file too short to be a gmon file\n"), filename); done (1); } /* Check to see if this a 4.4BSD-style header. */ if (gmon_io_read_32 (ifp, &version)) goto bad_gmon_file; if (version == GMONVERSION) { unsigned int profrate; /* 4.4BSD format header. */ if (gmon_io_read_32 (ifp, &profrate)) goto bad_gmon_file; if (!histograms) hz = profrate; else if (hz != (int) profrate) { fprintf (stderr, _("%s: profiling rate incompatible with first gmon file\n"), filename); done (1); } switch (gmon_get_ptr_size ()) { case ptr_32bit: header_size = GMON_HDRSIZE_BSD44_32; break; case ptr_64bit: header_size = GMON_HDRSIZE_BSD44_64; break; } } else { /* Old style BSD format. */ if (file_format == FF_BSD44) { fprintf (stderr, _("%s: file `%s' has bad magic cookie\n"), whoami, filename); done (1); } switch (gmon_get_ptr_size ()) { case ptr_32bit: header_size = GMON_HDRSIZE_OLDBSD_32; break; case ptr_64bit: header_size = GMON_HDRSIZE_OLDBSD_64; break; } } /* Position the file to after the header. */ if (fseek (ifp, header_size, SEEK_SET) < 0) { perror (filename); done (1); } samp_bytes = tmp.ncnt - header_size; hist_num_bins = samp_bytes / sizeof (UNIT); if (histograms && (tmp.low_pc != histograms->lowpc || tmp.high_pc != histograms->highpc || (hist_num_bins != histograms->num_bins))) { fprintf (stderr, _("%s: incompatible with first gmon file\n"), filename); done (1); } if (!histograms) { num_histograms = 1; histograms = (struct histogram *) xmalloc (sizeof (struct histogram)); histograms->lowpc = tmp.low_pc; histograms->highpc = tmp.high_pc; histograms->num_bins = hist_num_bins; hist_scale = (double)((tmp.high_pc - tmp.low_pc) / sizeof (UNIT)) / hist_num_bins; histograms->sample = (int *) xmalloc (hist_num_bins * sizeof (int)); memset (histograms->sample, 0, hist_num_bins * sizeof (int)); } DBG (SAMPLEDEBUG, printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx ncnt %d\n", (unsigned long) tmp.low_pc, (unsigned long) tmp.high_pc, tmp.ncnt); printf ("[gmon_out_read] samp_bytes %d hist_num_bins %d\n", samp_bytes, hist_num_bins)); /* Make sure that we have sensible values. */ if (samp_bytes < 0 || histograms->lowpc > histograms->highpc) { fprintf (stderr, _("%s: file '%s' does not appear to be in gmon.out format\n"), whoami, filename); done (1); } if (hist_num_bins) ++nhist; 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); } histograms->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 (gmon_read_raw_arc (ifp, &from_pc, &self_pc, &count) == 0) { ++narcs; DBG (SAMPLEDEBUG, printf ("[gmon_out_read] frompc 0x%lx selfpc 0x%lx count %lu\n", (unsigned long) from_pc, (unsigned long) self_pc, count)); /* Add this arc. */ cg_tally (from_pc, self_pc, count); } 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 (ifp != stdin) fclose (ifp); if (output_style & STYLE_GMON_INFO) { printf (_("File `%s' (version %d) contains:\n"), filename, gmon_file_version); printf (nhist == 1 ? _("\t%d histogram record\n") : _("\t%d histogram records\n"), nhist); printf (narcs == 1 ? _("\t%d call-graph record\n") : _("\t%d call-graph records\n"), narcs); printf (nbbs == 1 ? _("\t%d basic-block count record\n") : _("\t%d basic-block count records\n"), nbbs); first_output = FALSE; } } void gmon_out_write (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, (bfd_vma) 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 || file_format == FF_BSD44) { UNIT raw_bin_count; unsigned int i, hdrsize; unsigned padsize; char pad[3*4]; Arc *arc; Sym *sym; memset (pad, 0, sizeof (pad)); hdrsize = 0; /* Decide how large the header will be. Use the 4.4BSD format header if explicitly specified, or if the profiling rate is non-standard. Otherwise, use the old BSD format. */ if (file_format == FF_BSD44 || hz != hertz()) { padsize = 3*4; switch (gmon_get_ptr_size ()) { case ptr_32bit: hdrsize = GMON_HDRSIZE_BSD44_32; break; case ptr_64bit: hdrsize = GMON_HDRSIZE_BSD44_64; break; } } else { padsize = 0; switch (gmon_get_ptr_size ()) { case ptr_32bit: hdrsize = GMON_HDRSIZE_OLDBSD_32; break; case ptr_64bit: hdrsize = GMON_HDRSIZE_OLDBSD_64; /* FIXME: Checking host compiler defines here means that we can't use a cross gprof alpha OSF. */ #if defined(__alpha__) && defined (__osf__) padsize = 4; #endif break; } } /* Write the parts of the headers that are common to both the old BSD and 4.4BSD formats. */ if (gmon_io_write_vma (ofp, histograms->lowpc) || gmon_io_write_vma (ofp, histograms->highpc) || gmon_io_write_32 (ofp, histograms->num_bins * sizeof (UNIT) + hdrsize)) { perror (filename); done (1); } /* Write out the 4.4BSD header bits, if that's what we're using. */ if (file_format == FF_BSD44 || hz != hertz()) { if (gmon_io_write_32 (ofp, GMONVERSION) || gmon_io_write_32 (ofp, (unsigned int) hz)) { perror (filename); done (1); } } /* Now write out any necessary padding after the meaningful header bits. */ if (padsize != 0 && fwrite (pad, 1, padsize, ofp) != padsize) { perror (filename); done (1); } /* Dump the samples. */ for (i = 0; i < histograms->num_bins; ++i) { bfd_put_16 (core_bfd, (bfd_vma) histograms->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) { if (gmon_write_raw_arc (ofp, arc->parent->addr, arc->child->addr, arc->count)) { perror (filename); done (1); } DBG (SAMPLEDEBUG, printf ("[dumpsum] frompc 0x%lx selfpc 0x%lx count %lu\n", (unsigned long) arc->parent->addr, (unsigned long) 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); } }
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