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- /* gmon_io.c - Input and output from/to gmon.out files.
- Copyright (C) 1999-2022 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 (void)
- {
- 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 (void)
- {
- 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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