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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/gcov-io.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/gcov-io.c | 537 |
1 files changed, 537 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/gcov-io.c b/gcc-4.2.1-5666.3/gcc/gcov-io.c new file mode 100644 index 000000000..ab8e08db4 --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/gcov-io.c @@ -0,0 +1,537 @@ +/* File format for coverage information + 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>. + +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, 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 + 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; + 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 + + 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; +} + +/* 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 << 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. */ + +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; +} + +/* 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_words (1); + + 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_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 /* 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_words (1 + alloc); + + 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_words (2); + + 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; + + 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 */ + +/* 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_words (2); + + 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_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; +} + +/* 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_words (1); + + 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_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; +} + +/* 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_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 +/* 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 (void) +{ + struct stat status; + + if (fstat (fileno (gcov_var.file), &status)) + return 0; + else + return status.st_mtime; +} +#endif /* IN_GCOV */ |