Break out coverage routines to new file.

        * Makefile.in (COVERAGE_H): New variable
        (C_OBJS): Add coverage.o
        (coverage.o): New target.
        (profile.o, loop-init.o, sched-ebb.o, predict.o, tracer.o): Adjust
        dependencies.
        (GTFILES): Adjust.
        (gt-coverage.h): New target.
        (gt-profile.h): Remove.
        * profile.h: Remove. Move to ...
        * coverage.h: ... here. New. #include gcov-io.h.
        * gcov-io.h: Move function definitions to ...
        * gcov-io.c: ... here. New.
        * profile.c: Move coverage routines to coverage.c.
        (instrument_edges, get_exec_counts, branch_prob, init_branch_prob,
        end_branch_prob): Adjust.
        * coverage.c: New. Coverage routines from profile.c
        (coverage_counter_ref, coverage_init, coverage_finish,
        coverage_end_function, coverage_begin_output,
        coverage_counter_ref, get_coverage_counts): Define.
        * gcov-dump.c, gcov.c: #include gcov-io.c.
        * libgcov.c: Likewise. Adjust.
        * loop-init.c: Don't #include profile.h
        * tracer.c, predict.c, sched-ebb.c: Adjust #includes.
        * rtl.h: Add coverage prototypes.
        * toplev.c (compile_file): Init coverage, not branch_prob.
        Always call coverage_finish.
        (rest_of_compilation): Call coverage_end_function.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@65897 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 431 insertions, 0 deletions

diff --git a/gcc/gcov-io.c b/gcc/gcov-io.c
new file mode 100644
index 00000000000..94002a9c42b
--- /dev/null
+++ b/gcc/gcov-io.c
@@ -0,0 +1,431 @@
+/* File format for coverage information
+   Copyright (C) 1996, 1997, 1998, 2000, 2002,
+   2003  Free Software Foundation, Inc.
+   Contributed by Bob Manson <manson@cygnus.com>.
+   Completely remangled by Nathan Sidwell <nathan@codesourcery.com>.
+
+This file is part of GCC.
+
+GCC 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 2, or (at your option) any later
+version.
+
+GCC 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 GCC; see the file COPYING.  If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */
+
+/* Routines declared in gcov-io.h.  This file should be #included by
+   another source file, after having #included gcov-io.h.  */
+
+/* Open a gcov file. NAME is the name of the file to open and MODE
+   indicates whether a new file should be created, or an existing file
+   opened for modification. If MODE is >= 0 an existing file will be
+   opened, if possible, and if MODE is <= 0, a new file will be
+   created. Use MODE=0 to attempt to reopen an existing file and then
+   fall back on creating a new one.  Return zero on failure, >0 on
+   opening an existing file and <0 on creating a new one.  */
+
+GCOV_LINKAGE int
+gcov_open (const char *name, int mode)
+{
+  int result = 1;
+  size_t alloc = 1024;
+#if defined (TARGET_HAS_F_SETLKW) && IN_LIBGCOV
+  struct flock s_flock;
+
+  s_flock.l_type = F_WRLCK;
+  s_flock.l_whence = SEEK_SET;
+  s_flock.l_start = 0;
+  s_flock.l_len = 0; /* Until EOF.  */
+  s_flock.l_pid = getpid ();
+#endif
+  
+  if (gcov_var.file)
+    abort ();
+  gcov_var.position = gcov_var.length = 0;
+  gcov_var.error = gcov_var.modified = 0;
+  if (mode >= 0)
+    gcov_var.file = fopen (name, "r+b");
+  if (!gcov_var.file && mode <= 0)
+    {
+      result = -1;
+      gcov_var.file = fopen (name, "w+b");
+    }
+  if (!gcov_var.file)
+    return 0;
+
+#if defined (TARGET_HAS_F_SETLKW) && IN_LIBGCOV
+  while (fcntl (fileno (gcov_var.file), F_SETLKW, &s_flock)
+	 && errno == EINTR)
+    continue;
+#endif
+
+  if (result >= 0)
+    {
+      if (fseek (gcov_var.file, 0, SEEK_END))
+	{
+	  fclose (gcov_var.file);
+	  gcov_var.file = 0;
+	  return 0;
+	}
+      gcov_var.length = ftell (gcov_var.file);
+      fseek (gcov_var.file, 0, SEEK_SET);
+      alloc += gcov_var.length;
+    }
+  if (alloc > gcov_var.alloc)
+    {
+      if (gcov_var.buffer)
+	free (gcov_var.buffer);
+      gcov_var.alloc = alloc;
+#if IN_LIBGCOV
+      gcov_var.buffer = malloc (gcov_var.alloc);
+      if (!gcov_var.buffer)
+	{
+	  fclose (gcov_var.file);
+	  gcov_var.file = 0;
+	  gcov_var.length = 0;
+	  gcov_var.alloc = 0;
+	  return 0;
+	}
+#else
+      gcov_var.buffer = xmalloc (gcov_var.alloc);
+#endif
+    }
+  if (result >= 0
+      && fread (gcov_var.buffer, gcov_var.length, 1, gcov_var.file) != 1)
+    {
+      fclose (gcov_var.file);
+      gcov_var.file = 0;
+      gcov_var.length = 0;
+      return 0;
+    }
+  return result;
+}
+
+/* Close the current gcov file. Flushes data to disk. Returns nonzero
+   on failure or error flag set.  */
+
+GCOV_LINKAGE int
+gcov_close ()
+{
+  int result = 0;
+  
+  if (gcov_var.file)
+    {
+      if (gcov_var.modified
+	  && (fseek (gcov_var.file, 0, SEEK_SET)
+	      || fwrite (gcov_var.buffer, gcov_var.length,
+			 1, gcov_var.file) != 1))
+	result = 1;
+      fclose (gcov_var.file);
+      gcov_var.file = 0;
+      gcov_var.length = 0;
+    }
+#if !IN_LIBGCOV
+  free (gcov_var.buffer);
+  gcov_var.alloc = 0;
+  gcov_var.buffer = 0;
+#endif
+  return result ? 1 : gcov_var.error;
+}
+
+#if !IN_GCOV
+/* Allocate space to write BYTES bytes to the gcov file. Return a
+   pointer to those bytes, or NULL on failure.  */
+
+GCOV_LINKAGE unsigned char *
+gcov_write_bytes (unsigned bytes)
+{
+  char unsigned *result;
+
+  if (gcov_var.position + bytes > gcov_var.alloc)
+    {
+      size_t new_size = (gcov_var.alloc + bytes) * 3 / 2;
+
+      if (!gcov_var.buffer)
+	return 0;
+#if IN_LIBGCOV
+      result = realloc (gcov_var.buffer, new_size);
+      if (!result)
+	{
+	  free (gcov_var.buffer);
+	  gcov_var.buffer = 0;
+	  gcov_var.alloc = 0;
+	  gcov_var.position = gcov_var.length = 0;
+	  gcov_var.error = 1;
+	  return 0;
+	}
+#else
+      result = xrealloc (gcov_var.buffer, new_size);
+#endif
+      gcov_var.alloc = new_size;
+      gcov_var.buffer = result;
+    }
+  
+  result = &gcov_var.buffer[gcov_var.position];
+  gcov_var.position += bytes;
+  gcov_var.modified = 1;
+  if (gcov_var.position > gcov_var.length)
+    gcov_var.length = gcov_var.position;
+  return result;
+}
+
+/* Write unsigned VALUE to coverage file.  Sets error flag
+   appropriately.  */
+
+GCOV_LINKAGE void
+gcov_write_unsigned (unsigned value)
+{
+  unsigned char *buffer = gcov_write_bytes (4);
+  unsigned ix;
+
+  if (!buffer)
+    return;
+  for (ix = 4; ix--; )
+    {
+      buffer[ix] = value;
+      value >>= 8;
+    }
+  if (sizeof (value) > 4 && value)
+    gcov_var.error = -1;
+
+  return;
+}
+
+/* Write counter VALUE to coverage file.  Sets error flag
+   appropriately.  */
+
+#if IN_LIBGCOV
+GCOV_LINKAGE void
+gcov_write_counter (gcov_type value)
+{
+  unsigned char *buffer = gcov_write_bytes (8);
+  unsigned ix;
+
+  if (!buffer)
+    return;
+  for (ix = 8; ix--; )
+    {
+      buffer[ix] = value;
+      value >>= 8;
+    }
+  if ((sizeof (value) > 8 && value) || value < 0)
+    gcov_var.error = -1;
+  return;
+}
+#endif /* IN_LIBGCOV */
+
+/* Write STRING to coverage file.  Sets error flag on file
+   error, overflow flag on overflow */
+
+GCOV_LINKAGE void
+gcov_write_string (const char *string)
+{
+  unsigned length = 0;
+  unsigned pad = 0;
+  unsigned rem = 0;
+  unsigned char *buffer;
+
+  if (string)
+    {
+      length = strlen (string);
+      rem = 4 - (length & 3);
+    }
+  
+  buffer = gcov_write_bytes (4 + length + rem);
+  if (buffer)
+    {
+      unsigned ix;
+      unsigned value = length;
+      
+      for (ix = 4; ix--; )
+	{
+	  buffer[ix] = value;
+	  value >>= 8;
+	}
+      memcpy (buffer + 4, string, length);
+      memcpy (buffer + 4 + length, &pad, rem);
+    }
+}
+
+/* Write a tag TAG and reserve space for the record length. Return a
+   value to be used for gcov_write_length.  */
+
+GCOV_LINKAGE unsigned long
+gcov_write_tag (unsigned tag)
+{
+  unsigned long result = gcov_var.position;
+  unsigned char *buffer = gcov_write_bytes (8);
+  unsigned ix;
+
+  if (!buffer)
+    return 0;
+  for (ix = 4; ix--; )
+    {
+      buffer[ix] = tag;
+      tag >>= 8;
+    }
+  memset (buffer + 4, 0, 4);
+  return result;
+}
+
+/* Write a record length using POSITION, which was returned by
+   gcov_write_tag.  The current file position is the end of the
+   record, and is restored before returning.  Returns nonzero on
+   overflow.  */
+
+GCOV_LINKAGE void
+gcov_write_length (unsigned long position)
+{
+  if (position)
+    {
+      unsigned length = gcov_var.position - position - 8;
+      unsigned char *buffer = &gcov_var.buffer[position + 4];
+      unsigned ix;
+      
+      for (ix = 4; ix--; )
+	{
+	  buffer[ix] = length;
+	  length >>= 8;
+	}
+    }
+}
+
+#if IN_LIBGCOV
+/* Write a summary structure to the gcov file.  Return non-zero on
+   overflow.  */
+
+GCOV_LINKAGE void
+gcov_write_summary (unsigned tag, const struct gcov_summary *summary)
+{
+  unsigned long base;
+
+  base = gcov_write_tag (tag);
+  gcov_write_unsigned (summary->checksum);
+  gcov_write_unsigned (summary->runs);
+  gcov_write_unsigned (summary->arcs);
+  gcov_write_counter (summary->arc_sum);
+  gcov_write_counter (summary->arc_max_one);
+  gcov_write_counter (summary->arc_sum_max);
+  gcov_write_length (base);
+}
+#endif /* IN_LIBGCOV */
+
+#endif /*!IN_GCOV */
+
+/* Return a pointer to read BYTES bytes from the gcov file. Returns
+   NULL on failure (read past EOF). */
+
+GCOV_LINKAGE const unsigned char *
+gcov_read_bytes (unsigned bytes)
+{
+  const unsigned char *result;
+  
+  if (gcov_var.position + bytes > gcov_var.length)
+    {
+      gcov_var.error = 1;
+      return 0;
+    }
+  
+  result = &gcov_var.buffer[gcov_var.position];
+  gcov_var.position += bytes;
+  return result;
+}
+
+/* Read unsigned value from a coverage file. Sets error flag on file
+   error, overflow flag on overflow */
+
+GCOV_LINKAGE unsigned
+gcov_read_unsigned ()
+{
+  unsigned value = 0;
+  unsigned ix;
+  const unsigned char *buffer = gcov_read_bytes (4);
+
+  if (!buffer)
+    return 0;
+  for (ix = sizeof (value); ix < 4; ix++)
+    if (buffer[ix])
+      gcov_var.error = -1;
+  for (ix = 0; ix != 4; ix++)
+    {
+      value <<= 8;
+      value |= buffer[ix];
+    }
+  return value;
+}
+
+/* Read counter value from a coverage file. Sets error flag on file
+   error, overflow flag on overflow */
+
+GCOV_LINKAGE gcov_type
+gcov_read_counter ()
+{
+  gcov_type value = 0;
+  unsigned ix;
+  const unsigned char *buffer = gcov_read_bytes (8);
+
+  if (!buffer)
+    return 0;
+  for (ix = sizeof (value); ix < 8; ix++)
+    if (buffer[ix])
+      gcov_var.error = -1;
+  for (ix = 0; ix != 8; ix++)
+    {
+      value <<= 8;
+      value |= buffer[ix];
+    }
+  if (value < 0)
+    gcov_var.error = -1;
+  return value;
+}
+
+/* Read string from coverage file. Returns a pointer to a static
+   buffer, or NULL on empty string. You must copy the string before
+   calling another gcov function.  */
+
+GCOV_LINKAGE const char *
+gcov_read_string ()
+{
+  unsigned length = gcov_read_unsigned ();
+  
+  if (!length)
+    return 0;
+
+  length += 4 - (length & 3);
+  return (const char *) gcov_read_bytes (length);
+}
+
+GCOV_LINKAGE void
+gcov_read_summary (struct gcov_summary *summary)
+{
+  summary->checksum = gcov_read_unsigned ();
+  summary->runs = gcov_read_unsigned ();
+  summary->arcs = gcov_read_unsigned ();
+  summary->arc_sum = gcov_read_counter ();
+  summary->arc_max_one = gcov_read_counter ();
+  summary->arc_sum_max = gcov_read_counter ();
+}
+
+
+#if IN_GCOV > 0
+/* Return the modification time of the current gcov file.  */
+
+GCOV_LINKAGE time_t
+gcov_time ()
+{
+  struct stat status;
+  
+  if (fstat (fileno (gcov_var.file), &status))
+    return 0;
+  else
+    return status.st_mtime;
+}
+#endif /* IN_GCOV */