/* 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, 2007,
+ 2008 Free Software Foundation, Inc.
Contributed by Bob Manson <manson@cygnus.com>.
Completely remangled by Nathan Sidwell <nathan@codesourcery.com>.
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
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* 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. */
+ opened. 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. If MODE < 0, the file will be opened in
+ read-only mode. Otherwise it will be opened for modification.
+ Return zero on failure, >0 on opening an existing file and <0 on
+ creating a new one. */
GCOV_LINKAGE int
#if IN_LIBGCOV
#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; /* Until EOF. */
s_flock.l_pid = getpid ();
#endif
- if (gcov_var.file)
- abort ();
+ gcc_assert (!gcov_var.file);
gcov_var.start = 0;
gcov_var.offset = gcov_var.length = 0;
gcov_var.overread = -1u;
#if !IN_LIBGCOV
gcov_var.endian = 0;
#endif
+#if GCOV_LOCKED
+ if (mode > 0)
+ {
+ /* Read-only mode - acquire a read-lock. */
+ s_flock.l_type = F_RDLCK;
+ fd = open (name, O_RDONLY);
+ }
+ else
+ {
+ /* Write mode - acquire a write-lock. */
+ s_flock.l_type = F_WRLCK;
+ 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, (mode > 0) ? "rb" : "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");
+ gcov_var.file = fopen (name, (mode > 0) ? "rb" : "r+b");
+
if (gcov_var.file)
gcov_var.mode = 1;
else if (mode <= 0)
}
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
+ setbuf (gcov_var.file, (char *)0);
+
return 1;
}
new_size *= 2;
gcov_var.alloc = new_size;
- gcov_var.buffer = xrealloc (gcov_var.buffer, new_size << 2);
+ gcov_var.buffer = XRESIZEVAR (gcov_unsigned_t, gcov_var.buffer, new_size << 2);
}
#endif
{
gcov_unsigned_t *result;
- GCOV_CHECK_WRITING ();
+ 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)
{
- GCOV_CHECK (gcov_var.offset == 1);
+ gcc_assert (gcov_var.offset == 1);
memcpy (gcov_var.buffer, gcov_var.buffer + GCOV_BLOCK_SIZE, 4);
}
}
buffer[1] = (gcov_unsigned_t) (value >> 32);
else
buffer[1] = 0;
-
- if (value < 0)
- gcov_var.error = -1;
}
#endif /* IN_LIBGCOV */
gcov_unsigned_t length;
gcov_unsigned_t *buffer;
- GCOV_CHECK_WRITING ();
- GCOV_CHECK (position + 2 <= gcov_var.start + gcov_var.offset);
- GCOV_CHECK (position >= gcov_var.start);
+ 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];
const gcov_unsigned_t *result;
unsigned excess = gcov_var.length - gcov_var.offset;
- GCOV_CHECK_READING ();
+ gcc_assert (gcov_var.mode > 0);
if (excess < words)
{
gcov_var.start += gcov_var.offset;
#if IN_LIBGCOV
if (excess)
{
- GCOV_CHECK (excess == 1);
+ 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);
+ memmove (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, excess * 4);
#endif
gcov_var.offset = 0;
gcov_var.length = excess;
#if IN_LIBGCOV
- GCOV_CHECK (!gcov_var.length || gcov_var.length == 1);
+ gcc_assert (!gcov_var.length || gcov_var.length == 1);
excess = GCOV_BLOCK_SIZE;
#else
if (gcov_var.length + words > gcov_var.alloc)
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;
}
GCOV_LINKAGE void
gcov_sync (gcov_position_t base, gcov_unsigned_t length)
{
- GCOV_CHECK_READING ();
+ gcc_assert (gcov_var.mode > 0);
base += length;
if (base - gcov_var.start <= gcov_var.length)
gcov_var.offset = base - gcov_var.start;
#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. */
+/* Move to a given position in a gcov file. */
GCOV_LINKAGE void
gcov_seek (gcov_position_t base)
{
- GCOV_CHECK_WRITING ();
+ gcc_assert (gcov_var.mode < 0);
if (gcov_var.offset)
gcov_write_block (gcov_var.offset);
- fseek (gcov_var.file, base << 2, base ? SEEK_SET : SEEK_END);
+ fseek (gcov_var.file, base << 2, SEEK_SET);
gcov_var.start = ftell (gcov_var.file) >> 2;
}
#endif
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