/* File format for coverage information
- Copyright (C) 1996, 1997, 1998, 2000, 2002,
- 2003 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 1998, 2000, 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
Contributed by Bob Manson <manson@cygnus.com>.
Completely remangled by Nathan Sidwell <nathan@codesourcery.com>.
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. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
/* Routines declared in gcov-io.h. This file should be #included by
another source file, after having #included gcov-io.h. */
+#if !IN_GCOV
+static void gcov_write_block (unsigned);
+static gcov_unsigned_t *gcov_write_words (unsigned);
+#endif
+static const gcov_unsigned_t *gcov_read_words (unsigned);
+#if !IN_LIBGCOV
+static void gcov_allocate (unsigned);
+#endif
+
+static inline gcov_unsigned_t from_file (gcov_unsigned_t value)
+{
+#if !IN_LIBGCOV
+ if (gcov_var.endian)
+ {
+ value = (value >> 16) | (value << 16);
+ value = ((value & 0xff00ff) << 8) | ((value >> 8) & 0xff00ff);
+ }
+#endif
+ return value;
+}
+
/* 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
opening an existing file and <0 on creating a new one. */
GCOV_LINKAGE int
+#if IN_LIBGCOV
+gcov_open (const char *name)
+#else
gcov_open (const char *name, int mode)
+#endif
{
- int result = 1;
- size_t alloc = 1024;
+#if IN_LIBGCOV
+ const int mode = 0;
+#endif
#if GCOV_LOCKED
struct flock s_flock;
+ int fd;
s_flock.l_type = F_WRLCK;
s_flock.l_whence = SEEK_SET;
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)
+ gcc_assert (!gcov_var.file);
+ gcov_var.start = 0;
+ gcov_var.offset = gcov_var.length = 0;
+ gcov_var.overread = -1u;
+ gcov_var.error = 0;
+#if !IN_LIBGCOV
+ gcov_var.endian = 0;
+#endif
+#if GCOV_LOCKED
+ if (mode > 0)
+ fd = open (name, O_RDWR);
+ else
+ fd = open (name, O_RDWR | O_CREAT, 0666);
+ if (fd < 0)
return 0;
-#if GCOV_LOCKED
- while (fcntl (fileno (gcov_var.file), F_SETLKW, &s_flock)
- && errno == EINTR)
+ while (fcntl (fd, F_SETLKW, &s_flock) && errno == EINTR)
continue;
-#endif
- if (result >= 0)
+ gcov_var.file = fdopen (fd, "r+b");
+ if (!gcov_var.file)
{
- 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;
+ close (fd);
+ return 0;
}
- if (alloc > gcov_var.alloc)
+
+ if (mode > 0)
+ gcov_var.mode = 1;
+ else if (mode == 0)
{
- 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)
+ struct stat st;
+
+ if (fstat (fd, &st) < 0)
{
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 (st.st_size != 0)
+ gcov_var.mode = 1;
+ else
+ gcov_var.mode = mode * 2 + 1;
}
- if (result >= 0
- && fread (gcov_var.buffer, gcov_var.length, 1, gcov_var.file) != 1)
+ else
+ gcov_var.mode = mode * 2 + 1;
+#else
+ if (mode >= 0)
+ gcov_var.file = fopen (name, "r+b");
+ if (gcov_var.file)
+ gcov_var.mode = 1;
+ else if (mode <= 0)
{
- fclose (gcov_var.file);
- gcov_var.file = 0;
- gcov_var.length = 0;
- return 0;
+ gcov_var.file = fopen (name, "w+b");
+ if (gcov_var.file)
+ gcov_var.mode = mode * 2 + 1;
}
- return result;
+ if (!gcov_var.file)
+ return 0;
+#endif
+
+ setbuf (gcov_var.file, (char *)0);
+
+ return 1;
}
/* Close the current gcov file. Flushes data to disk. Returns nonzero
on failure or error flag set. */
GCOV_LINKAGE int
-gcov_close ()
+gcov_close (void)
{
- 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;
+#if !IN_GCOV
+ if (gcov_var.offset && gcov_var.mode < 0)
+ gcov_write_block (gcov_var.offset);
+#endif
fclose (gcov_var.file);
gcov_var.file = 0;
gcov_var.length = 0;
gcov_var.alloc = 0;
gcov_var.buffer = 0;
#endif
- return result ? 1 : gcov_var.error;
+ gcov_var.mode = 0;
+ return gcov_var.error;
+}
+
+#if !IN_LIBGCOV
+/* Check if MAGIC is EXPECTED. Use it to determine endianness of the
+ file. Returns +1 for same endian, -1 for other endian and zero for
+ not EXPECTED. */
+
+GCOV_LINKAGE int
+gcov_magic (gcov_unsigned_t magic, gcov_unsigned_t expected)
+{
+ if (magic == expected)
+ return 1;
+ magic = (magic >> 16) | (magic << 16);
+ magic = ((magic & 0xff00ff) << 8) | ((magic >> 8) & 0xff00ff);
+ if (magic == expected)
+ {
+ gcov_var.endian = 1;
+ return -1;
+ }
+ return 0;
+}
+#endif
+
+#if !IN_LIBGCOV
+static void
+gcov_allocate (unsigned length)
+{
+ size_t new_size = gcov_var.alloc;
+
+ if (!new_size)
+ new_size = GCOV_BLOCK_SIZE;
+ new_size += length;
+ new_size *= 2;
+
+ gcov_var.alloc = new_size;
+ gcov_var.buffer = xrealloc (gcov_var.buffer, new_size << 2);
}
+#endif
#if !IN_GCOV
+/* Write out the current block, if needs be. */
+
+static void
+gcov_write_block (unsigned size)
+{
+ if (fwrite (gcov_var.buffer, size << 2, 1, gcov_var.file) != 1)
+ gcov_var.error = 1;
+ gcov_var.start += size;
+ gcov_var.offset -= size;
+}
+
/* 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)
+static gcov_unsigned_t *
+gcov_write_words (unsigned words)
{
- char unsigned *result;
-
- if (gcov_var.position + bytes > gcov_var.alloc)
- {
- size_t new_size = (gcov_var.alloc + bytes) * 3 / 2;
+ gcov_unsigned_t *result;
- if (!gcov_var.buffer)
- return 0;
+ gcc_assert (gcov_var.mode < 0);
#if IN_LIBGCOV
- result = realloc (gcov_var.buffer, new_size);
- if (!result)
+ if (gcov_var.offset >= GCOV_BLOCK_SIZE)
+ {
+ gcov_write_block (GCOV_BLOCK_SIZE);
+ if (gcov_var.offset)
{
- 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;
+ gcc_assert (gcov_var.offset == 1);
+ memcpy (gcov_var.buffer, gcov_var.buffer + GCOV_BLOCK_SIZE, 4);
}
+ }
#else
- result = xrealloc (gcov_var.buffer, new_size);
+ if (gcov_var.offset + words > gcov_var.alloc)
+ gcov_allocate (gcov_var.offset + words);
#endif
- gcov_var.alloc = new_size;
- gcov_var.buffer = result;
- }
+ result = &gcov_var.buffer[gcov_var.offset];
+ gcov_var.offset += words;
- 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;
}
GCOV_LINKAGE void
gcov_write_unsigned (gcov_unsigned_t value)
{
- unsigned char *buffer = gcov_write_bytes (4);
- unsigned ix;
+ gcov_unsigned_t *buffer = gcov_write_words (1);
- if (!buffer)
- return;
- for (ix = 4; ix--; )
- {
- buffer[ix] = value;
- value >>= 8;
- }
- if (sizeof (value) > 4 && value)
- gcov_var.error = -1;
-
- return;
+ buffer[0] = value;
}
/* Write counter VALUE to coverage file. Sets error flag
GCOV_LINKAGE void
gcov_write_counter (gcov_type value)
{
- unsigned char *buffer = gcov_write_bytes (8);
- unsigned ix;
+ gcov_unsigned_t *buffer = gcov_write_words (2);
- if (!buffer)
- return;
- for (ix = 8; ix--; )
- {
- buffer[ix] = value;
- value >>= 8;
- }
- if ((sizeof (value) > 8 && value) || value < 0)
- gcov_var.error = -1;
- return;
+ buffer[0] = (gcov_unsigned_t) value;
+ if (sizeof (value) > sizeof (gcov_unsigned_t))
+ buffer[1] = (gcov_unsigned_t) (value >> 32);
+ else
+ buffer[1] = 0;
}
#endif /* IN_LIBGCOV */
gcov_write_string (const char *string)
{
unsigned length = 0;
- unsigned pad = 0;
- unsigned rem = 0;
- unsigned char *buffer;
+ unsigned alloc = 0;
+ gcov_unsigned_t *buffer;
if (string)
{
length = strlen (string);
- rem = 4 - (length & 3);
+ alloc = (length + 4) >> 2;
}
- 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);
- }
+ buffer = gcov_write_words (1 + alloc);
+
+ buffer[0] = alloc;
+ buffer[alloc] = 0;
+ memcpy (&buffer[1], string, length);
}
#endif
GCOV_LINKAGE gcov_position_t
gcov_write_tag (gcov_unsigned_t tag)
{
- gcov_position_t result = gcov_var.position;
- unsigned char *buffer = gcov_write_bytes (8);
- unsigned ix;
+ gcov_position_t result = gcov_var.start + gcov_var.offset;
+ gcov_unsigned_t *buffer = gcov_write_words (2);
- if (!buffer)
- return 0;
- for (ix = 4; ix--; )
- {
- buffer[ix] = tag;
- tag >>= 8;
- }
- memset (buffer + 4, 0, 4);
+ buffer[0] = tag;
+ buffer[1] = 0;
+
return result;
}
GCOV_LINKAGE void
gcov_write_length (gcov_position_t position)
{
- if (position)
- {
- gcov_unsigned_t 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;
- }
- }
+ unsigned offset;
+ gcov_unsigned_t length;
+ gcov_unsigned_t *buffer;
+
+ gcc_assert (gcov_var.mode < 0);
+ gcc_assert (position + 2 <= gcov_var.start + gcov_var.offset);
+ gcc_assert (position >= gcov_var.start);
+ offset = position - gcov_var.start;
+ length = gcov_var.offset - offset - 2;
+ buffer = (gcov_unsigned_t *) &gcov_var.buffer[offset];
+ buffer[1] = length;
+ if (gcov_var.offset >= GCOV_BLOCK_SIZE)
+ gcov_write_block (gcov_var.offset);
}
#else /* IN_LIBGCOV */
GCOV_LINKAGE void
gcov_write_tag_length (gcov_unsigned_t tag, gcov_unsigned_t length)
{
- unsigned char *buffer = gcov_write_bytes (8);
- unsigned ix;
+ gcov_unsigned_t *buffer = gcov_write_words (2);
- if (!buffer)
- return;
- for (ix = 4; ix--; )
- {
- buffer[ix] = tag;
- tag >>= 8;
- }
- for (ix = 4; ix--; )
- {
- buffer[ix + 4] = length;
- length >>= 8;
- }
- return;
+ buffer[0] = tag;
+ buffer[1] = length;
}
-/* Write a summary structure to the gcov file. Return non-zero on
+/* Write a summary structure to the gcov file. Return nonzero on
overflow. */
GCOV_LINKAGE void
#endif /*!IN_GCOV */
/* Return a pointer to read BYTES bytes from the gcov file. Returns
- NULL on failure (read past EOF). */
+ NULL on failure (read past EOF). */
-GCOV_LINKAGE const unsigned char *
-gcov_read_bytes (unsigned bytes)
+static const gcov_unsigned_t *
+gcov_read_words (unsigned words)
{
- const unsigned char *result;
+ const gcov_unsigned_t *result;
+ unsigned excess = gcov_var.length - gcov_var.offset;
- if (gcov_var.position + bytes > gcov_var.length)
+ gcc_assert (gcov_var.mode > 0);
+ if (excess < words)
{
- gcov_var.error = 1;
- return 0;
+ gcov_var.start += gcov_var.offset;
+#if IN_LIBGCOV
+ if (excess)
+ {
+ gcc_assert (excess == 1);
+ memcpy (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, 4);
+ }
+#else
+ memmove (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, excess * 4);
+#endif
+ gcov_var.offset = 0;
+ gcov_var.length = excess;
+#if IN_LIBGCOV
+ gcc_assert (!gcov_var.length || gcov_var.length == 1);
+ excess = GCOV_BLOCK_SIZE;
+#else
+ if (gcov_var.length + words > gcov_var.alloc)
+ gcov_allocate (gcov_var.length + words);
+ excess = gcov_var.alloc - gcov_var.length;
+#endif
+ excess = fread (gcov_var.buffer + gcov_var.length,
+ 1, excess << 2, gcov_var.file) >> 2;
+ gcov_var.length += excess;
+ if (gcov_var.length < words)
+ {
+ gcov_var.overread += words - gcov_var.length;
+ gcov_var.length = 0;
+ return 0;
+ }
}
-
- result = &gcov_var.buffer[gcov_var.position];
- gcov_var.position += bytes;
+ result = &gcov_var.buffer[gcov_var.offset];
+ gcov_var.offset += words;
return result;
}
error, overflow flag on overflow */
GCOV_LINKAGE gcov_unsigned_t
-gcov_read_unsigned ()
+gcov_read_unsigned (void)
{
- gcov_unsigned_t value = 0;
- unsigned ix;
- const unsigned char *buffer = gcov_read_bytes (4);
+ gcov_unsigned_t value;
+ const gcov_unsigned_t *buffer = gcov_read_words (1);
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];
- }
+ value = from_file (buffer[0]);
return value;
}
error, overflow flag on overflow */
GCOV_LINKAGE gcov_type
-gcov_read_counter ()
+gcov_read_counter (void)
{
- gcov_type value = 0;
- unsigned ix;
- const unsigned char *buffer = gcov_read_bytes (8);
+ gcov_type value;
+ const gcov_unsigned_t *buffer = gcov_read_words (2);
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)
+ value = from_file (buffer[0]);
+ if (sizeof (value) > sizeof (gcov_unsigned_t))
+ value |= ((gcov_type) from_file (buffer[1])) << 32;
+ else if (buffer[1])
gcov_var.error = -1;
+
return value;
}
#if !IN_LIBGCOV
GCOV_LINKAGE const char *
-gcov_read_string ()
+gcov_read_string (void)
{
unsigned length = gcov_read_unsigned ();
if (!length)
return 0;
- length += 4 - (length & 3);
- return (const char *) gcov_read_bytes (length);
+ return (const char *) gcov_read_words (length);
}
#endif
}
}
+#if !IN_LIBGCOV
+/* Reset to a known position. BASE should have been obtained from
+ gcov_position, LENGTH should be a record length. */
+
+GCOV_LINKAGE void
+gcov_sync (gcov_position_t base, gcov_unsigned_t length)
+{
+ gcc_assert (gcov_var.mode > 0);
+ base += length;
+ if (base - gcov_var.start <= gcov_var.length)
+ gcov_var.offset = base - gcov_var.start;
+ else
+ {
+ gcov_var.offset = gcov_var.length = 0;
+ fseek (gcov_var.file, base << 2, SEEK_SET);
+ gcov_var.start = ftell (gcov_var.file) >> 2;
+ }
+}
+#endif
+
+#if IN_LIBGCOV
+/* Move to the a set position in a gcov file. */
+
+GCOV_LINKAGE void
+gcov_seek (gcov_position_t base)
+{
+ gcc_assert (gcov_var.mode < 0);
+ if (gcov_var.offset)
+ gcov_write_block (gcov_var.offset);
+ fseek (gcov_var.file, base << 2, SEEK_SET);
+ gcov_var.start = ftell (gcov_var.file) >> 2;
+}
+#endif
+
#if IN_GCOV > 0
/* Return the modification time of the current gcov file. */
GCOV_LINKAGE time_t
-gcov_time ()
+gcov_time (void)
{
struct stat status;
OSDN Git Service
