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cell-binutils  2.17cvs20070401
Enumerations | Functions | Variables
gmon_io.c File Reference
#include "gprof.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"
#include "hertz.h"
#include "hist.h"
#include "libiberty.h"

Go to the source code of this file.

Enumerations

enum  gmon_ptr_size { ptr_32bit, ptr_64bit }
enum  gmon_ptr_signedness { ptr_signed, ptr_unsigned }

Functions

static enum gmon_ptr_size gmon_get_ptr_size (void)
static enum gmon_ptr_signedness gmon_get_ptr_signedness (void)
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_io_read_32 (FILE *ifp, unsigned int *valp)
int gmon_io_read_vma (FILE *ifp, bfd_vma *valp)
int gmon_io_read (FILE *ifp, char *buf, size_t n)
int gmon_io_write_32 (FILE *ofp, unsigned int val)
int gmon_io_write_vma (FILE *ofp, bfd_vma val)
int gmon_io_write_8 (FILE *ofp, unsigned int val)
int gmon_io_write (FILE *ofp, char *buf, size_t n)
void gmon_out_read (const char *filename)
void gmon_out_write (const char *filename)

Variables

int gmon_input = 0
int gmon_file_version = 0

Enumeration Type Documentation

Enumerator:
ptr_signed 
ptr_unsigned 

Definition at line 43 of file gmon_io.c.

Enumerator:
ptr_32bit 
ptr_64bit 

Definition at line 38 of file gmon_io.c.


Function Documentation

static enum gmon_ptr_signedness gmon_get_ptr_signedness ( void  ) [static]

Definition at line 90 of file gmon_io.c.

{
  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);
}

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static enum gmon_ptr_size gmon_get_ptr_size ( void  ) [static]

Definition at line 64 of file gmon_io.c.

{
  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);
    }
}

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int gmon_io_read ( FILE *  ifp,
char *  buf,
size_t  n 
)

Definition at line 161 of file gmon_io.c.

{
  if (fread (buf, 1, n, ifp) != n)
    return 1;
  return 0;
}

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int gmon_io_read_32 ( FILE *  ifp,
unsigned int valp 
)

Definition at line 102 of file gmon_io.c.

{
  char buf[4];

  if (fread (buf, 1, 4, ifp) != 4)
    return 1;
  *valp = bfd_get_32 (core_bfd, buf);
  return 0;
}

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int gmon_io_read_vma ( FILE *  ifp,
bfd_vma valp 
)

Definition at line 126 of file gmon_io.c.

{
  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;
}

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int gmon_io_write ( FILE *  ofp,
char *  buf,
size_t  n 
)

Definition at line 225 of file gmon_io.c.

{
  if (fwrite (buf, 1, n, ofp) != n)
    return 1;
  return 0;
}

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int gmon_io_write_32 ( FILE *  ofp,
unsigned int  val 
)

Definition at line 169 of file gmon_io.c.

{
  char buf[4];

  bfd_put_32 (core_bfd, (bfd_vma) val, buf);
  if (fwrite (buf, 1, 4, ofp) != 4)
    return 1;
  return 0;
}

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int gmon_io_write_8 ( FILE *  ofp,
unsigned int  val 
)

Definition at line 214 of file gmon_io.c.

{
  char buf[1];

  bfd_put_8 (core_bfd, val, buf);
  if (fwrite (buf, 1, 1, ofp) != 1)
    return 1;
  return 0;
}

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int gmon_io_write_vma ( FILE *  ofp,
bfd_vma  val 
)

Definition at line 193 of file gmon_io.c.

{

  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;
}

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void gmon_out_read ( const char *  filename)

Definition at line 292 of file gmon_io.c.

{
  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;
#ifdef SET_BINARY
      SET_BINARY (fileno (stdin));
#endif
    }
  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;
      static struct hdr h;
      UNIT raw_bin_count;
      struct hdr tmp;
      unsigned int version;

      /* 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 (!s_highpc)
           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);
       }

      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 - header_size;
      hist_num_bins = samp_bytes / sizeof (UNIT);

      DBG (SAMPLEDEBUG,
          printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx ncnt %d\n",
                 (unsigned long) h.low_pc, (unsigned long) h.high_pc,
                 h.ncnt);
          printf ("[gmon_out_read]   s_lowpc 0x%lx   s_highpc 0x%lx\n",
                 (unsigned long) s_lowpc, (unsigned long) s_highpc);
          printf ("[gmon_out_read]     lowpc 0x%lx     highpc 0x%lx\n",
                 (unsigned long) lowpc, (unsigned long) highpc);
          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 || lowpc > 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;

      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 (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);
       }

      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 (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;
    }
}

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void gmon_out_write ( const char *  filename)

Definition at line 598 of file gmon_io.c.

{
  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, s_lowpc)
          || gmon_io_write_vma (ofp, s_highpc)
          || gmon_io_write_32 (ofp, hist_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 < hist_num_bins; ++i)
       {
         bfd_put_16 (core_bfd, (bfd_vma) 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)
           {
             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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static int gmon_read_raw_arc ( FILE *  ifp,
bfd_vma fpc,
bfd_vma spc,
unsigned long cnt 
) [static]

Definition at line 233 of file gmon_io.c.

{
#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;
}

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static int gmon_write_raw_arc ( FILE *  ofp,
bfd_vma  fpc,
bfd_vma  spc,
unsigned long  cnt 
) [static]

Definition at line 267 of file gmon_io.c.

{

  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;
}

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Variable Documentation

Definition at line 61 of file gmon_io.c.

Definition at line 60 of file gmon_io.c.