gcov: Use system IO buffering
gcc/ChangeLog: * gcov-io.c (gcov_write_block): Remove. (gcov_write_words): Likewise. (gcov_read_words): Re-implement using gcov_read_bytes. (gcov_allocate): Remove. (GCOV_BLOCK_SIZE): Likewise. (struct gcov_var): Remove most of the fields. (gcov_position): Implement with ftell. (gcov_rewrite): Remove setting of start and offset fields. (from_file): Re-format. (gcov_open): Remove setbuf call. It should not be needed. (gcov_close): Remove internal buffer handling. (gcov_magic): Use __builtin_bswap32. (gcov_write_counter): Use directly gcov_write_unsigned. (gcov_write_string): Use direct fwrite and do not round to 4 bytes. (gcov_seek): Use directly fseek. (gcov_write_tag): Use gcov_write_unsigned directly. (gcov_write_length): Likewise. (gcov_write_tag_length): Likewise. (gcov_read_bytes): Use directly fread. (gcov_read_unsigned): Use gcov_read_words. (gcov_read_counter): Likewise. (gcov_read_string): Use gcov_read_bytes. * gcov-io.h (GCOV_WORD_SIZE): Adjust to reflect that size is not in bytes, but words (4B). (GCOV_TAG_FUNCTION_LENGTH): Likewise. (GCOV_TAG_ARCS_LENGTH): Likewise. (GCOV_TAG_ARCS_NUM): Likewise. (GCOV_TAG_COUNTER_LENGTH): Likewise. (GCOV_TAG_COUNTER_NUM): Likewise. (GCOV_TAG_SUMMARY_LENGTH): Likewise. libgcc/ChangeLog: * libgcov-driver.c: Fix GNU coding style.
This commit is contained in:
marxin
Martin Liska
parent
c3e02c2e44
commit
23eb66d1d4
3 changed files with 77 additions and 230 deletions
284
gcc/gcov-io.c
284
gcc/gcov-io.c
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@ -27,40 +27,14 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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/* Routines declared in gcov-io.h. This file should be #included by
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another source file, after having #included gcov-io.h. */
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#if !IN_GCOV
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static void gcov_write_block (unsigned);
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static gcov_unsigned_t *gcov_write_words (unsigned);
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#endif
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static const gcov_unsigned_t *gcov_read_words (unsigned);
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#if !IN_LIBGCOV
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static void gcov_allocate (unsigned);
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#endif
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/* Optimum number of gcov_unsigned_t's read from or written to disk. */
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#define GCOV_BLOCK_SIZE (1 << 10)
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static gcov_unsigned_t *gcov_read_words (void *buffer, unsigned);
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struct gcov_var
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{
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FILE *file;
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gcov_position_t start; /* Position of first byte of block */
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unsigned offset; /* Read/write position within the block. */
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unsigned length; /* Read limit in the block. */
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unsigned overread; /* Number of words overread. */
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int error; /* < 0 overflow, > 0 disk error. */
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int mode; /* < 0 writing, > 0 reading */
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int mode; /* < 0 writing, > 0 reading. */
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int endian; /* Swap endianness. */
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#if IN_LIBGCOV
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/* Holds one block plus 4 bytes, thus all coverage reads & writes
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fit within this buffer and we always can transfer GCOV_BLOCK_SIZE
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to and from the disk. libgcov never backtracks and only writes 4
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or 8 byte objects. */
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gcov_unsigned_t buffer[GCOV_BLOCK_SIZE + 1];
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#else
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/* Holds a variable length block, as the compiler can write
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strings and needs to backtrack. */
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size_t alloc;
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gcov_unsigned_t *buffer;
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#endif
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} gcov_var;
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/* Save the current position in the gcov file. */
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@ -71,8 +45,7 @@ static inline
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gcov_position_t
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gcov_position (void)
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{
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gcov_nonruntime_assert (gcov_var.mode > 0);
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return gcov_var.start + gcov_var.offset;
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return ftell (gcov_var.file);
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}
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/* Return nonzero if the error flag is set. */
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@ -92,20 +65,16 @@ GCOV_LINKAGE inline void
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gcov_rewrite (void)
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{
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gcov_var.mode = -1;
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gcov_var.start = 0;
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gcov_var.offset = 0;
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fseek (gcov_var.file, 0L, SEEK_SET);
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}
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#endif
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static inline gcov_unsigned_t from_file (gcov_unsigned_t value)
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static inline gcov_unsigned_t
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from_file (gcov_unsigned_t value)
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{
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#if !IN_LIBGCOV || defined (IN_GCOV_TOOL)
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if (gcov_var.endian)
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{
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value = (value >> 16) | (value << 16);
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value = ((value & 0xff00ff) << 8) | ((value >> 8) & 0xff00ff);
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}
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return __builtin_bswap32 (value);
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#endif
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return value;
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}
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@ -142,9 +111,6 @@ gcov_open (const char *name, int mode)
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#endif
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gcov_nonruntime_assert (!gcov_var.file);
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gcov_var.start = 0;
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gcov_var.offset = gcov_var.length = 0;
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gcov_var.overread = -1u;
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gcov_var.error = 0;
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#if !IN_LIBGCOV || defined (IN_GCOV_TOOL)
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gcov_var.endian = 0;
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@ -222,8 +188,6 @@ gcov_open (const char *name, int mode)
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gcov_var.mode = mode ? mode : 1;
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setbuf (gcov_var.file, (char *)0);
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return 1;
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}
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@ -235,19 +199,9 @@ gcov_close (void)
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{
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if (gcov_var.file)
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{
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#if !IN_GCOV
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if (gcov_var.offset && gcov_var.mode < 0)
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gcov_write_block (gcov_var.offset);
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#endif
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fclose (gcov_var.file);
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gcov_var.file = 0;
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gcov_var.length = 0;
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}
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#if !IN_LIBGCOV
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free (gcov_var.buffer);
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gcov_var.alloc = 0;
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gcov_var.buffer = 0;
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#endif
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gcov_var.mode = 0;
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return gcov_var.error;
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}
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@ -262,9 +216,8 @@ gcov_magic (gcov_unsigned_t magic, gcov_unsigned_t expected)
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{
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if (magic == expected)
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return 1;
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magic = (magic >> 16) | (magic << 16);
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magic = ((magic & 0xff00ff) << 8) | ((magic >> 8) & 0xff00ff);
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if (magic == expected)
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if (__builtin_bswap32 (magic) == expected)
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{
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gcov_var.endian = 1;
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return -1;
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@ -273,71 +226,15 @@ gcov_magic (gcov_unsigned_t magic, gcov_unsigned_t expected)
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}
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#endif
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#if !IN_LIBGCOV
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static void
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gcov_allocate (unsigned length)
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{
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size_t new_size = gcov_var.alloc;
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if (!new_size)
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new_size = GCOV_BLOCK_SIZE;
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new_size += length;
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new_size *= 2;
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gcov_var.alloc = new_size;
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gcov_var.buffer = XRESIZEVAR (gcov_unsigned_t, gcov_var.buffer, new_size << 2);
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}
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#endif
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#if !IN_GCOV
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/* Write out the current block, if needs be. */
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static void
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gcov_write_block (unsigned size)
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{
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if (fwrite (gcov_var.buffer, size << 2, 1, gcov_var.file) != 1)
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gcov_var.error = 1;
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gcov_var.start += size;
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gcov_var.offset -= size;
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}
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/* Allocate space to write BYTES bytes to the gcov file. Return a
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pointer to those bytes, or NULL on failure. */
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static gcov_unsigned_t *
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gcov_write_words (unsigned words)
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{
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gcov_unsigned_t *result;
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gcov_nonruntime_assert (gcov_var.mode < 0);
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#if IN_LIBGCOV
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if (gcov_var.offset >= GCOV_BLOCK_SIZE)
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{
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gcov_write_block (GCOV_BLOCK_SIZE);
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if (gcov_var.offset)
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{
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memcpy (gcov_var.buffer, gcov_var.buffer + GCOV_BLOCK_SIZE, 4);
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}
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}
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#else
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if (gcov_var.offset + words > gcov_var.alloc)
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gcov_allocate (gcov_var.offset + words);
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#endif
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result = &gcov_var.buffer[gcov_var.offset];
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gcov_var.offset += words;
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return result;
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}
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/* Write unsigned VALUE to coverage file. Sets error flag
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appropriately. */
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/* Write unsigned VALUE to coverage file. */
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GCOV_LINKAGE void
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gcov_write_unsigned (gcov_unsigned_t value)
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{
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gcov_unsigned_t *buffer = gcov_write_words (1);
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buffer[0] = value;
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gcov_unsigned_t r = fwrite (&value, sizeof (value), 1, gcov_var.file);
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if (r != 1)
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gcov_var.error = 1;
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}
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/* Write counter VALUE to coverage file. Sets error flag
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@ -347,13 +244,11 @@ gcov_write_unsigned (gcov_unsigned_t value)
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GCOV_LINKAGE void
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gcov_write_counter (gcov_type value)
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{
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gcov_unsigned_t *buffer = gcov_write_words (2);
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buffer[0] = (gcov_unsigned_t) value;
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gcov_write_unsigned ((gcov_unsigned_t) value);
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if (sizeof (value) > sizeof (gcov_unsigned_t))
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buffer[1] = (gcov_unsigned_t) (value >> 32);
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gcov_write_unsigned ((gcov_unsigned_t) (value >> 32));
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else
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buffer[1] = 0;
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gcov_write_unsigned (0);
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}
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#endif /* IN_LIBGCOV */
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@ -365,23 +260,16 @@ GCOV_LINKAGE void
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gcov_write_string (const char *string)
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{
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unsigned length = 0;
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unsigned alloc = 0;
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gcov_unsigned_t *buffer;
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if (string)
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length = strlen (string) + 1;
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gcov_write_unsigned (length);
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if (length > 0)
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{
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length = strlen (string);
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alloc = (length + 4) >> 2;
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}
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buffer = gcov_write_words (1 + alloc);
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buffer[0] = alloc;
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if (alloc > 0)
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{
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buffer[alloc] = 0; /* place nul terminators. */
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memcpy (&buffer[1], string, length);
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gcov_unsigned_t r = fwrite (string, length, 1, gcov_var.file);
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if (r != 1)
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gcov_var.error = 1;
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}
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}
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#endif
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@ -418,6 +306,14 @@ gcov_write_filename (const char *filename)
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}
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#endif
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/* Move to a given position in a gcov file. */
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GCOV_LINKAGE void
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gcov_seek (gcov_position_t base)
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{
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fseek (gcov_var.file, base, SEEK_SET);
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}
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#if !IN_LIBGCOV
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/* Write a tag TAG and reserve space for the record length. Return a
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value to be used for gcov_write_length. */
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@ -425,11 +321,9 @@ gcov_write_filename (const char *filename)
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GCOV_LINKAGE gcov_position_t
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gcov_write_tag (gcov_unsigned_t tag)
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{
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gcov_position_t result = gcov_var.start + gcov_var.offset;
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gcov_unsigned_t *buffer = gcov_write_words (2);
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buffer[0] = tag;
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buffer[1] = 0;
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gcov_position_t result = gcov_position ();
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gcov_write_unsigned (tag);
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gcov_write_unsigned (0);
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return result;
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}
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@ -442,19 +336,13 @@ gcov_write_tag (gcov_unsigned_t tag)
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GCOV_LINKAGE void
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gcov_write_length (gcov_position_t position)
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{
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unsigned offset;
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gcov_unsigned_t length;
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gcov_unsigned_t *buffer;
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gcov_position_t current_position = gcov_position ();
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gcov_nonruntime_assert (gcov_var.mode < 0);
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gcov_nonruntime_assert (position + 2 <= gcov_var.start + gcov_var.offset);
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gcov_nonruntime_assert (position >= gcov_var.start);
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offset = position - gcov_var.start;
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length = gcov_var.offset - offset - 2;
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buffer = (gcov_unsigned_t *) &gcov_var.buffer[offset];
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buffer[1] = length;
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if (gcov_var.offset >= GCOV_BLOCK_SIZE)
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gcov_write_block (gcov_var.offset);
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gcov_nonruntime_assert (current_position >= position + 2 * GCOV_WORD_SIZE);
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gcov_seek (position + GCOV_WORD_SIZE);
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gcov_write_unsigned (current_position - position - 2 * GCOV_WORD_SIZE);
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gcov_seek (current_position);
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}
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#else /* IN_LIBGCOV */
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@ -464,10 +352,8 @@ gcov_write_length (gcov_position_t position)
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GCOV_LINKAGE void
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gcov_write_tag_length (gcov_unsigned_t tag, gcov_unsigned_t length)
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{
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gcov_unsigned_t *buffer = gcov_write_words (2);
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buffer[0] = tag;
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buffer[1] = length;
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gcov_write_unsigned (tag);
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gcov_write_unsigned (length);
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}
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/* Write a summary structure to the gcov file. Return nonzero on
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@ -485,52 +371,28 @@ gcov_write_summary (gcov_unsigned_t tag, const struct gcov_summary *summary)
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#endif /*!IN_GCOV */
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/* Return a pointer to read BYTES bytes from the gcov file. Returns
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/* Return a pointer to read COUNT bytes from the gcov file. Returns
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NULL on failure (read past EOF). */
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static const gcov_unsigned_t *
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gcov_read_words (unsigned words)
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static void *
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gcov_read_bytes (void *buffer, unsigned count)
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{
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const gcov_unsigned_t *result;
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unsigned excess = gcov_var.length - gcov_var.offset;
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if (gcov_var.mode <= 0)
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return NULL;
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if (excess < words)
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{
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gcov_var.start += gcov_var.offset;
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if (excess)
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{
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#if IN_LIBGCOV
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memcpy (gcov_var.buffer, gcov_var.buffer + gcov_var.offset, 4);
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#else
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memmove (gcov_var.buffer, gcov_var.buffer + gcov_var.offset,
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excess * 4);
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#endif
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}
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gcov_var.offset = 0;
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gcov_var.length = excess;
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#if IN_LIBGCOV
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excess = GCOV_BLOCK_SIZE;
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#else
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if (gcov_var.length + words > gcov_var.alloc)
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gcov_allocate (gcov_var.length + words);
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excess = gcov_var.alloc - gcov_var.length;
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#endif
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excess = fread (gcov_var.buffer + gcov_var.length,
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1, excess << 2, gcov_var.file) >> 2;
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gcov_var.length += excess;
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if (gcov_var.length < words)
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{
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gcov_var.overread += words - gcov_var.length;
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gcov_var.length = 0;
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return 0;
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}
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}
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result = &gcov_var.buffer[gcov_var.offset];
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gcov_var.offset += words;
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return result;
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unsigned read = fread (buffer, count, 1, gcov_var.file);
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if (read != 1)
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return NULL;
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return buffer;
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}
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/* Read WORDS gcov_unsigned_t values from gcov file. */
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static gcov_unsigned_t *
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gcov_read_words (void *buffer, unsigned words)
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{
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return (gcov_unsigned_t *)gcov_read_bytes (buffer, GCOV_WORD_SIZE * words);
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}
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/* Read unsigned value from a coverage file. Sets error flag on file
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@ -540,10 +402,12 @@ GCOV_LINKAGE gcov_unsigned_t
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gcov_read_unsigned (void)
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{
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gcov_unsigned_t value;
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const gcov_unsigned_t *buffer = gcov_read_words (1);
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gcov_unsigned_t allocated_buffer[1];
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gcov_unsigned_t *buffer = gcov_read_words (&allocated_buffer, 1);
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if (!buffer)
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return 0;
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value = from_file (buffer[0]);
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return value;
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}
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@ -555,7 +419,8 @@ GCOV_LINKAGE gcov_type
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gcov_read_counter (void)
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{
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gcov_type value;
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const gcov_unsigned_t *buffer = gcov_read_words (2);
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gcov_unsigned_t allocated_buffer[2];
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gcov_unsigned_t *buffer = gcov_read_words (&allocated_buffer, 2);
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if (!buffer)
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return 0;
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@ -632,7 +497,8 @@ gcov_read_string (void)
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if (!length)
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return 0;
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return (const char *) gcov_read_words (length);
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void *buffer = XNEWVEC (char *, length);
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return (const char *) gcov_read_bytes (buffer, length);
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}
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#endif
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@ -654,27 +520,7 @@ gcov_sync (gcov_position_t base, gcov_unsigned_t length)
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{
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gcov_nonruntime_assert (gcov_var.mode > 0);
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base += length;
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if (base - gcov_var.start <= gcov_var.length)
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gcov_var.offset = base - gcov_var.start;
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else
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{
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gcov_var.offset = gcov_var.length = 0;
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fseek (gcov_var.file, base << 2, SEEK_SET);
|
||||
gcov_var.start = ftell (gcov_var.file) >> 2;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if IN_LIBGCOV
|
||||
/* Move to a given position in a gcov file. */
|
||||
|
||||
GCOV_LINKAGE void
|
||||
gcov_seek (gcov_position_t base)
|
||||
{
|
||||
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;
|
||||
fseek (gcov_var.file, base, SEEK_SET);
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
|
|||
|
|
@ -243,22 +243,25 @@ typedef uint64_t gcov_type_unsigned;
|
|||
/* The record tags. Values [1..3f] are for tags which may be in either
|
||||
file. Values [41..9f] for those in the note file and [a1..ff] for
|
||||
the data file. The tag value zero is used as an explicit end of
|
||||
file marker -- it is not required to be present. */
|
||||
file marker -- it is not required to be present.
|
||||
All length values are in bytes. */
|
||||
|
||||
#define GCOV_WORD_SIZE 4
|
||||
|
||||
#define GCOV_TAG_FUNCTION ((gcov_unsigned_t)0x01000000)
|
||||
#define GCOV_TAG_FUNCTION_LENGTH (3)
|
||||
#define GCOV_TAG_FUNCTION_LENGTH (3 * GCOV_WORD_SIZE)
|
||||
#define GCOV_TAG_BLOCKS ((gcov_unsigned_t)0x01410000)
|
||||
#define GCOV_TAG_BLOCKS_LENGTH(NUM) (NUM)
|
||||
#define GCOV_TAG_ARCS ((gcov_unsigned_t)0x01430000)
|
||||
#define GCOV_TAG_ARCS_LENGTH(NUM) (1 + (NUM) * 2)
|
||||
#define GCOV_TAG_ARCS_NUM(LENGTH) (((LENGTH) - 1) / 2)
|
||||
#define GCOV_TAG_ARCS_LENGTH(NUM) (1 + (NUM) * 2 * GCOV_WORD_SIZE)
|
||||
#define GCOV_TAG_ARCS_NUM(LENGTH) (((LENGTH / GCOV_WORD_SIZE) - 1) / 2)
|
||||
#define GCOV_TAG_LINES ((gcov_unsigned_t)0x01450000)
|
||||
#define GCOV_TAG_COUNTER_BASE ((gcov_unsigned_t)0x01a10000)
|
||||
#define GCOV_TAG_COUNTER_LENGTH(NUM) ((NUM) * 2)
|
||||
#define GCOV_TAG_COUNTER_NUM(LENGTH) ((LENGTH) / 2)
|
||||
#define GCOV_TAG_COUNTER_LENGTH(NUM) ((NUM) * 2 * GCOV_WORD_SIZE)
|
||||
#define GCOV_TAG_COUNTER_NUM(LENGTH) ((LENGTH / GCOV_WORD_SIZE) / 2)
|
||||
#define GCOV_TAG_OBJECT_SUMMARY ((gcov_unsigned_t)0xa1000000)
|
||||
#define GCOV_TAG_PROGRAM_SUMMARY ((gcov_unsigned_t)0xa3000000) /* Obsolete */
|
||||
#define GCOV_TAG_SUMMARY_LENGTH (2)
|
||||
#define GCOV_TAG_SUMMARY_LENGTH (2 * GCOV_WORD_SIZE)
|
||||
#define GCOV_TAG_AFDO_FILE_NAMES ((gcov_unsigned_t)0xaa000000)
|
||||
#define GCOV_TAG_AFDO_FUNCTION ((gcov_unsigned_t)0xac000000)
|
||||
#define GCOV_TAG_AFDO_WORKING_SET ((gcov_unsigned_t)0xaf000000)
|
||||
|
|
|
|||
|
|
@ -558,10 +558,8 @@ read_fatal:;
|
|||
fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS);
|
||||
|
||||
if ((error = gcov_close ()))
|
||||
gcov_error (error < 0 ?
|
||||
GCOV_PROF_PREFIX "Overflow writing\n" :
|
||||
GCOV_PROF_PREFIX "Error writing\n",
|
||||
gf->filename);
|
||||
gcov_error ((error < 0 ? GCOV_PROF_PREFIX "Overflow writing\n"
|
||||
: GCOV_PROF_PREFIX "Error writing\n"), gf->filename);
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue