#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;
}
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;
int fd;
s_flock.l_type = F_WRLCK;
s_flock.l_whence = SEEK_SET;
s_flock.l_start = 0;
s_flock.l_len = 0;
s_flock.l_pid = getpid ();
#endif
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;
while (fcntl (fd, F_SETLKW, &s_flock) && errno == EINTR)
continue;
gcov_var.file = fdopen (fd, "r+b");
if (!gcov_var.file)
{
close (fd);
return 0;
}
if (mode > 0)
gcov_var.mode = 1;
else if (mode == 0)
{
struct stat st;
if (fstat (fd, &st) < 0)
{
fclose (gcov_var.file);
gcov_var.file = 0;
return 0;
}
if (st.st_size != 0)
gcov_var.mode = 1;
else
gcov_var.mode = mode * 2 + 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)
{
gcov_var.file = fopen (name, "w+b");
if (gcov_var.file)
gcov_var.mode = mode * 2 + 1;
}
if (!gcov_var.file)
return 0;
#endif
setbuf (gcov_var.file, (char *)0);
return 1;
}
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
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
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;
}
static gcov_unsigned_t *
gcov_write_words (unsigned words)
{
gcov_unsigned_t *result;
gcc_assert (gcov_var.mode < 0);
#if IN_LIBGCOV
if (gcov_var.offset >= GCOV_BLOCK_SIZE)
{
gcov_write_block (GCOV_BLOCK_SIZE);
if (gcov_var.offset)
{
gcc_assert (gcov_var.offset == 1);
memcpy (gcov_var.buffer, gcov_var.buffer + GCOV_BLOCK_SIZE, 4);
}
}
#else
if (gcov_var.offset + words > gcov_var.alloc)
gcov_allocate (gcov_var.offset + words);
#endif
result = &gcov_var.buffer[gcov_var.offset];
gcov_var.offset += words;
return result;
}
GCOV_LINKAGE void
gcov_write_unsigned (gcov_unsigned_t value)
{
gcov_unsigned_t *buffer = gcov_write_words (1);
buffer[0] = value;
}
#if IN_LIBGCOV
GCOV_LINKAGE void
gcov_write_counter (gcov_type value)
{
gcov_unsigned_t *buffer = gcov_write_words (2);
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
#if !IN_LIBGCOV
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_words (1 + alloc);
buffer[0] = alloc;
buffer[alloc] = 0;
memcpy (&buffer[1], string, length);
}
#endif
#if !IN_LIBGCOV
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_words (2);
buffer[0] = tag;
buffer[1] = 0;
return result;
}
GCOV_LINKAGE void
gcov_write_length (gcov_position_t position)
{
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
GCOV_LINKAGE void
gcov_write_tag_length (gcov_unsigned_t tag, gcov_unsigned_t length)
{
gcov_unsigned_t *buffer = gcov_write_words (2);
buffer[0] = tag;
buffer[1] = length;
}
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
#endif
static const gcov_unsigned_t *
gcov_read_words (unsigned words)
{
const gcov_unsigned_t *result;
unsigned excess = gcov_var.length - gcov_var.offset;
gcc_assert (gcov_var.mode > 0);
if (excess < words)
{
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.offset];
gcov_var.offset += words;
return result;
}
GCOV_LINKAGE gcov_unsigned_t
gcov_read_unsigned (void)
{
gcov_unsigned_t value;
const gcov_unsigned_t *buffer = gcov_read_words (1);
if (!buffer)
return 0;
value = from_file (buffer[0]);
return value;
}
GCOV_LINKAGE gcov_type
gcov_read_counter (void)
{
gcov_type value;
const gcov_unsigned_t *buffer = gcov_read_words (2);
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;
return value;
}
#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_words (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
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
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
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