19990502 sourceware importbinu_ss_19990502

1 files changed, 454 insertions, 0 deletions

diff --git a/gprof/gmon_io.c b/gprof/gmon_io.c
new file mode 100644
index 0000000..ff294f5
--- /dev/null
+++ b/gprof/gmon_io.c
@@ -0,0 +1,454 @@
+/*
+ * Input and output from/to gmon.out files.
+ */
+#include "cg_arcs.h"
+#include "basic_blocks.h"
+#include "bfd.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 "gprof.h"
+#include "hertz.h"
+#include "hist.h"
+#include "libiberty.h"
+
+int gmon_input = 0;
+int gmon_file_version = 0;	/* 0 == old (non-versioned) file format */
+
+/*
+ * This probably ought to be in libbfd.
+ */
+bfd_vma
+DEFUN (get_vma, (abfd, addr), bfd * abfd AND bfd_byte * addr)
+{
+  switch (sizeof (char*))
+    {
+    case 4:
+      return bfd_get_32 (abfd, addr);
+    case 8:
+      return bfd_get_64 (abfd, addr);
+    default:
+      fprintf (stderr, _("%s: bfd_vma has unexpected size of %ld bytes\n"),
+	       whoami, (long) sizeof (char*));
+      done (1);
+    }
+}
+
+
+/*
+ * This probably ought to be in libbfd.
+ */
+void
+DEFUN (put_vma, (abfd, val, addr), bfd * abfd AND bfd_vma val AND bfd_byte * addr)
+{
+  switch (sizeof (char*))
+    {
+    case 4:
+      bfd_put_32 (abfd, val, addr);
+      break;
+    case 8:
+      bfd_put_64 (abfd, val, addr);
+      break;
+    default:
+      fprintf (stderr, _("%s: bfd_vma has unexpected size of %ld bytes\n"),
+	       whoami, (long) sizeof (char*));
+      done (1);
+    }
+}
+
+
+void
+DEFUN (gmon_out_read, (filename), 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;
+    }
+  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;
+	int ncnt;
+      };
+      int i, samp_bytes, header_size;
+      unsigned long count;
+      bfd_vma from_pc, self_pc;
+      struct raw_arc raw_arc;
+      struct raw_phdr raw;
+      static struct hdr h;
+      UNIT raw_bin_count;
+      struct hdr tmp;
+
+      /*
+       * 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);
+	}
+      if (fread (&raw, 1, sizeof (struct raw_phdr), ifp)
+	  != sizeof (struct raw_phdr))
+	{
+	  fprintf (stderr, _("%s: file too short to be a gmon file\n"),
+		   filename);
+	  done (1);
+	}
+      tmp.low_pc = get_vma (core_bfd, (bfd_byte *) &raw.low_pc[0]);
+      tmp.high_pc = get_vma (core_bfd, (bfd_byte *) &raw.high_pc[0]);
+      tmp.ncnt = bfd_get_32 (core_bfd, (bfd_byte *) &raw.ncnt[0]);
+
+      if (bfd_get_32 (core_bfd, (bfd_byte *) &raw.version[0])
+	  == GMONVERSION)
+	{
+	  int profrate;
+
+	  /* 4.4BSD format header.  */
+
+	  profrate = bfd_get_32 (core_bfd, (bfd_byte *) &raw.profrate[0]);
+	  if (!s_highpc)
+	    hz = profrate;
+	  else if (hz != profrate)
+	    {
+	      fprintf (stderr,
+		       _("%s: profiling rate incompatible with first gmon file\n"),
+		       filename);
+	      done (1);
+	    }
+
+	  header_size = sizeof (struct raw_phdr);
+	}
+      else
+	{
+	  /* old style BSD format.  */
+	  if (file_format == FF_BSD44)
+	    {
+	      fprintf (stderr, _("%s: file `%s' has bad magic cookie\n"),
+		       whoami, filename);
+	      done (1);
+	    }
+
+	  if (fseek (ifp, sizeof (struct old_raw_phdr), SEEK_SET) < 0)
+	    {
+	      perror (filename);
+	      done (1);
+	    }
+
+	  header_size = sizeof (struct old_raw_phdr);
+	}
+
+      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",
+		   h.low_pc, h.high_pc, h.ncnt);
+	   printf ("[gmon_out_read]   s_lowpc 0x%lx   s_highpc 0x%lx\n",
+		   s_lowpc, s_highpc);
+	   printf ("[gmon_out_read]     lowpc 0x%lx     highpc 0x%lx\n",
+		   lowpc, highpc);
+	   printf ("[gmon_out_read] samp_bytes %d hist_num_bins %d\n",
+		   samp_bytes, hist_num_bins));
+
+      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 (fread (&raw_arc, sizeof (raw_arc), 1, ifp) == 1)
+	{
+	  ++narcs;
+	  from_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.from_pc);
+	  self_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.self_pc);
+	  count = bfd_get_32 (core_bfd, (bfd_byte *) raw_arc.count);
+	  DBG (SAMPLEDEBUG,
+	     printf ("[gmon_out_read] frompc 0x%lx selfpc 0x%lx count %lu\n",
+		     from_pc, 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 (_("\t%d histogram record%s\n"),
+	      nhist, nhist == 1 ? "" : "s");
+      printf (_("\t%d call-graph record%s\n"),
+	      narcs, narcs == 1 ? "" : "s");
+      printf (_("\t%d basic-block count record%s\n"),
+	      nbbs, nbbs == 1 ? "" : "s");
+      first_output = FALSE;
+    }
+}
+
+
+void
+DEFUN (gmon_out_write, (filename), 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, 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)
+    {
+      struct raw_arc raw_arc;
+      UNIT raw_bin_count;
+      struct raw_phdr h;
+      int i;
+      Arc *arc;
+      Sym *sym;
+
+      memset (&h, 0, sizeof h);
+      put_vma (core_bfd, s_lowpc, (bfd_byte *) &h.low_pc);
+      put_vma (core_bfd, s_highpc, (bfd_byte *) &h.high_pc);
+      bfd_put_32 (core_bfd,
+		  hist_num_bins * sizeof (UNIT) + sizeof (struct raw_phdr),
+		  (bfd_byte *) &h.ncnt);
+
+      /* Write header.  Use new style BSD format is explicitly
+         specified, or if the profiling rate is non-standard;
+         otherwise, use the old BSD format.  */
+      if (file_format == FF_BSD44
+	  || hz != hertz ())
+	{
+	  bfd_put_32 (core_bfd, GMONVERSION, (bfd_byte *) &h.version);
+	  bfd_put_32 (core_bfd, hz, (bfd_byte *) &h.profrate);
+	  if (fwrite (&h, sizeof (struct raw_phdr), 1, ofp) != 1)
+	    {
+	      perror (filename);
+	      done (1);
+	    }
+	}
+      else
+	{
+	  if (fwrite (&h, sizeof (struct old_raw_phdr), 1, ofp) != 1)
+	    {
+	      perror (filename);
+	      done (1);
+	    }
+	}
+
+      /* dump the samples: */
+
+      for (i = 0; i < hist_num_bins; ++i)
+	{
+	  bfd_put_16 (core_bfd, 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)
+	    {
+	      put_vma (core_bfd, arc->parent->addr,
+		       (bfd_byte *) raw_arc.from_pc);
+	      put_vma (core_bfd, arc->child->addr,
+		       (bfd_byte *) raw_arc.self_pc);
+	      bfd_put_32 (core_bfd, arc->count, (bfd_byte *) raw_arc.count);
+	      if (fwrite (&raw_arc, sizeof (raw_arc), 1, ofp) != 1)
+		{
+		  perror (filename);
+		  done (1);
+		}
+	      DBG (SAMPLEDEBUG,
+		   printf ("[dumpsum] frompc 0x%lx selfpc 0x%lx count %lu\n",
+			   arc->parent->addr, 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);
+    }
+}