+++ /dev/null
-/* 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. */
-
-#if !IN_GCOV
-static void gcov_write_block (unsigned);
-static gcov_unsigned_t *gcov_write_bytes (unsigned);
-#endif
-static const gcov_unsigned_t *gcov_read_bytes (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
- 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
-#if IN_LIBGCOV
-gcov_open (const char *name)
-#else
-gcov_open (const char *name, int mode)
-#endif
-{
-#if IN_LIBGCOV
- const int mode = 0;
-#endif
-#if GCOV_LOCKED
- 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.start = 0;
- gcov_var.offset = gcov_var.length = 0;
- gcov_var.overread = -4u;
- gcov_var.error = 0;
-#if !IN_LIBGCOV
- gcov_var.endian = 0;
-#endif
- if (mode >= 0)
- gcov_var.file = fopen (name, "r+b");
- if (gcov_var.file)
- gcov_var.mode = 1;
- else if (mode <= 0)
- {
- gcov_var.file = fopen (name, "w+b");
- if (gcov_var.file)
- gcov_var.mode = mode * 2 + 1;
- }
- if (!gcov_var.file)
- return 0;
-
- setbuf (gcov_var.file, (char *)0);
-
-#if GCOV_LOCKED
- while (fcntl (fileno (gcov_var.file), F_SETLKW, &s_flock)
- && errno == EINTR)
- continue;
-#endif
-
- return 1;
-}
-
-/* Close the current gcov file. Flushes data to disk. Returns nonzero
- on failure or error flag set. */
-
-GCOV_LINKAGE int
-gcov_close (void)
-{
- if (gcov_var.file)
- {
-#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;
- }
-#if !IN_LIBGCOV
- free (gcov_var.buffer);
- gcov_var.alloc = 0;
- gcov_var.buffer = 0;
-#endif
- 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);
-}
-#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, 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. */
-
-static gcov_unsigned_t *
-gcov_write_bytes (unsigned bytes)
-{
- gcov_unsigned_t *result;
-
- GCOV_CHECK_WRITING ();
- GCOV_CHECK (!(bytes & 3));
-#if IN_LIBGCOV
- if (gcov_var.offset >= GCOV_BLOCK_SIZE)
- {
- gcov_write_block (GCOV_BLOCK_SIZE);
- if (gcov_var.offset)
- {
- GCOV_CHECK (gcov_var.offset == 4);
- memcpy (gcov_var.buffer, gcov_var.buffer + GCOV_BLOCK_SIZE, 4);
- }
- }
-#else
- if (gcov_var.offset + bytes > gcov_var.alloc)
- gcov_allocate (gcov_var.offset + bytes);
-#endif
- result = (gcov_unsigned_t *)&gcov_var.buffer[gcov_var.offset];
- gcov_var.offset += bytes;
-
- return result;
-}
-
-/* Write unsigned VALUE to coverage file. Sets error flag
- appropriately. */
-
-GCOV_LINKAGE void
-gcov_write_unsigned (gcov_unsigned_t value)
-{
- gcov_unsigned_t *buffer = gcov_write_bytes (4);
-
- buffer[0] = value;
-}
-
-/* Write counter VALUE to coverage file. Sets error flag
- appropriately. */
-
-#if IN_LIBGCOV
-GCOV_LINKAGE void
-gcov_write_counter (gcov_type value)
-{
- gcov_unsigned_t *buffer = gcov_write_bytes (8);
-
- buffer[0] = (gcov_unsigned_t) value;
- if (sizeof (value) > sizeof (gcov_unsigned_t))
- buffer[1] = (gcov_unsigned_t) (value >> 32);
- else
- buffer[1] = 0;
-
- if (value < 0)
- gcov_var.error = -1;
-}
-#endif /* IN_LIBGCOV */
-
-#if !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 alloc = 0;
- gcov_unsigned_t *buffer;
-
- if (string)
- {
- length = strlen (string);
- alloc = (length + 4) >> 2;
- }
-
- buffer = gcov_write_bytes (4 + alloc * 4);
-
- buffer[0] = alloc;
- buffer[alloc] = 0;
- memcpy (&buffer[1], string, length);
-}
-#endif
-
-#if !IN_LIBGCOV
-/* Write a tag TAG and reserve space for the record length. Return a
- value to be used for gcov_write_length. */
-
-GCOV_LINKAGE gcov_position_t
-gcov_write_tag (gcov_unsigned_t tag)
-{
- gcov_position_t result = gcov_var.start + gcov_var.offset;
- gcov_unsigned_t *buffer = gcov_write_bytes (8);
-
- buffer[0] = tag;
- buffer[1] = 0;
-
- 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 (gcov_position_t position)
-{
- unsigned offset;
- gcov_unsigned_t length;
- gcov_unsigned_t *buffer;
-
- GCOV_CHECK_WRITING ();
- GCOV_CHECK (position + 8 <= gcov_var.start + gcov_var.offset);
- GCOV_CHECK (position >= gcov_var.start);
- offset = position - gcov_var.start;
- length = gcov_var.offset - offset - 8;
- 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 */
-
-/* Write a tag TAG and length LENGTH. */
-
-GCOV_LINKAGE void
-gcov_write_tag_length (gcov_unsigned_t tag, gcov_unsigned_t length)
-{
- gcov_unsigned_t *buffer = gcov_write_bytes (8);
-
- buffer[0] = tag;
- buffer[1] = length;
-}
-
-/* Write a summary structure to the gcov file. Return nonzero on
- overflow. */
-
-GCOV_LINKAGE void
-gcov_write_summary (gcov_unsigned_t tag, const struct gcov_summary *summary)
-{
- unsigned ix;
- const struct gcov_ctr_summary *csum;
-
- gcov_write_tag_length (tag, GCOV_TAG_SUMMARY_LENGTH);
- gcov_write_unsigned (summary->checksum);
- for (csum = summary->ctrs, ix = GCOV_COUNTERS_SUMMABLE; ix--; csum++)
- {
- gcov_write_unsigned (csum->num);
- gcov_write_unsigned (csum->runs);
- gcov_write_counter (csum->sum_all);
- gcov_write_counter (csum->run_max);
- gcov_write_counter (csum->sum_max);
- }
-}
-#endif /* IN_LIBGCOV */
-
-#endif /*!IN_GCOV */
-
-/* Return a pointer to read BYTES bytes from the gcov file. Returns
- NULL on failure (read past EOF). */
-
-static const gcov_unsigned_t *
-gcov_read_bytes (unsigned bytes)
-{
- const gcov_unsigned_t *result;
- unsigned excess = gcov_var.length - gcov_var.offset;
-
- GCOV_CHECK_READING ();
- GCOV_CHECK (!(bytes & 3));
- if (excess < bytes)
- {
- gcov_var.start += gcov_var.offset;
-#if IN_LIBGCOV
- if (excess)
- {
- GCOV_CHECK (excess == 4);
- memcpy (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, 4);
- }
-#else
- memmove (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, excess);
-#endif
- gcov_var.offset = 0;
- gcov_var.length = excess;
-#if IN_LIBGCOV
- GCOV_CHECK (!gcov_var.length || gcov_var.length == 4);
- excess = GCOV_BLOCK_SIZE;
-#else
- if (gcov_var.length + bytes > gcov_var.alloc)
- gcov_allocate (gcov_var.length + bytes);
- excess = gcov_var.alloc - gcov_var.length;
-#endif
- excess = fread (gcov_var.buffer + gcov_var.length,
- 1, excess, gcov_var.file);
- gcov_var.length += excess;
- if (gcov_var.length < bytes)
- {
- gcov_var.overread += bytes - gcov_var.length;
- gcov_var.length = 0;
- return 0;
- }
- }
- result = (gcov_unsigned_t *)&gcov_var.buffer[gcov_var.offset];
- gcov_var.offset += bytes;
- return result;
-}
-
-/* Read unsigned value from a coverage file. Sets error flag on file
- error, overflow flag on overflow */
-
-GCOV_LINKAGE gcov_unsigned_t
-gcov_read_unsigned (void)
-{
- gcov_unsigned_t value;
- const gcov_unsigned_t *buffer = gcov_read_bytes (4);
-
- if (!buffer)
- return 0;
- value = from_file (buffer[0]);
- 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 (void)
-{
- gcov_type value;
- const gcov_unsigned_t *buffer = gcov_read_bytes (8);
-
- if (!buffer)
- return 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;
-
- 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. */
-
-#if !IN_LIBGCOV
-GCOV_LINKAGE const char *
-gcov_read_string (void)
-{
- unsigned length = gcov_read_unsigned ();
-
- if (!length)
- return 0;
-
- return (const char *) gcov_read_bytes (length);
-}
-#endif
-
-GCOV_LINKAGE void
-gcov_read_summary (struct gcov_summary *summary)
-{
- unsigned ix;
- struct gcov_ctr_summary *csum;
-
- summary->checksum = gcov_read_unsigned ();
- for (csum = summary->ctrs, ix = GCOV_COUNTERS_SUMMABLE; ix--; csum++)
- {
- csum->num = gcov_read_unsigned ();
- csum->runs = gcov_read_unsigned ();
- csum->sum_all = gcov_read_counter ();
- csum->run_max = gcov_read_counter ();
- csum->sum_max = gcov_read_counter ();
- }
-}
-
-#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)
-{
- GCOV_CHECK_READING ();
- 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, SEEK_SET);
- gcov_var.start = ftell (gcov_var.file);
- }
-}
-#endif
-
-#if IN_LIBGCOV
-/* Move to the a set position in a gcov file. BASE is zero to move to
- the end, and nonzero to move to that position. */
-
-GCOV_LINKAGE void
-gcov_seek (gcov_position_t base)
-{
- GCOV_CHECK_WRITING ();
- if (gcov_var.offset)
- gcov_write_block (gcov_var.offset);
- fseek (gcov_var.file, base, base ? SEEK_SET : SEEK_END);
- gcov_var.start = ftell (gcov_var.file);
-}
-#endif
-
-#if IN_GCOV > 0
-/* Return the modification time of the current gcov file. */
-
-GCOV_LINKAGE time_t
-gcov_time (void)
-{
- struct stat status;
-
- if (fstat (fileno (gcov_var.file), &status))
- return 0;
- else
- return status.st_mtime;
-}
-#endif /* IN_GCOV */
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