static int
merge_one_data (const char *filename,
struct gcov_info *gi_ptr,
struct gcov_summary *prg_p,
struct gcov_summary *this_prg,
gcov_position_t *summary_pos_p,
gcov_position_t *eof_pos_p,
gcov_unsigned_t crc32)
{
gcov_unsigned_t tag, length;
unsigned t_ix;
int f_ix;
int error = 0;
struct gcov_fn_buffer **fn_tail = &fn_buffer;
struct gcov_summary_buffer **sum_tail = &sum_buffer;
length = gcov_read_unsigned ();
if (!gcov_version (gi_ptr, length, filename))
return -1;
length = gcov_read_unsigned ();
if (length != gi_ptr->stamp)
/* Read from a different compilation. Overwrite the file. */
return 0;
/* Look for program summary. */
for (f_ix = 0;;)
{
struct gcov_summary tmp;
*eof_pos_p = gcov_position ();
tag = gcov_read_unsigned ();
if (tag != GCOV_TAG_PROGRAM_SUMMARY)
break;
f_ix--;
length = gcov_read_unsigned ();
gcov_read_summary (&tmp);
if ((error = gcov_is_error ()))
goto read_error;
if (*summary_pos_p)
{
/* Save all summaries after the one that will be
merged into below. These will need to be rewritten
as histogram merging may change the number of non-zero
histogram entries that will be emitted, and thus the
size of the merged summary. */
(*sum_tail) = (struct gcov_summary_buffer *)
xmalloc (sizeof(struct gcov_summary_buffer));
(*sum_tail)->summary = tmp;
(*sum_tail)->next = 0;
sum_tail = &((*sum_tail)->next);
goto next_summary;
}
if (tmp.checksum != crc32)
goto next_summary;
for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++)
if (tmp.ctrs[t_ix].num != this_prg->ctrs[t_ix].num)
goto next_summary;
*prg_p = tmp;
*summary_pos_p = *eof_pos_p;
next_summary:;
}
/* Merge execution counts for each function. */
for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions;
f_ix++, tag = gcov_read_unsigned ())
{
const struct gcov_ctr_info *ci_ptr;
const struct gcov_fn_info *gfi_ptr = gi_ptr->functions[f_ix];
if (tag != GCOV_TAG_FUNCTION)
goto read_mismatch;
length = gcov_read_unsigned ();
if (!length)
/* This function did not appear in the other program.
We have nothing to merge. */
continue;
if (length != GCOV_TAG_FUNCTION_LENGTH)
goto read_mismatch;
if (!gfi_ptr || gfi_ptr->key != gi_ptr)
{
/* This function appears in the other program. We
need to buffer the information in order to write
it back out -- we'll be inserting data before
this point, so cannot simply keep the data in the
file. */
fn_tail = buffer_fn_data (filename, gi_ptr, fn_tail, f_ix);
if (!fn_tail)
goto read_mismatch;
continue;
}
length = gcov_read_unsigned ();
if (length != gfi_ptr->ident)
goto read_mismatch;
length = gcov_read_unsigned ();
if (length != gfi_ptr->lineno_checksum)
goto read_mismatch;
length = gcov_read_unsigned ();
if (length != gfi_ptr->cfg_checksum)
goto read_mismatch;
ci_ptr = gfi_ptr->ctrs;
for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
{
gcov_merge_fn merge = gi_ptr->merge[t_ix];
if (!merge)
continue;
tag = gcov_read_unsigned ();
length = gcov_read_unsigned ();
if (tag != GCOV_TAG_FOR_COUNTER (t_ix)
|| length != GCOV_TAG_COUNTER_LENGTH (ci_ptr->num))
goto read_mismatch;
(*merge) (ci_ptr->values, ci_ptr->num);
ci_ptr++;
}
if ((error = gcov_is_error ()))
goto read_error;
}
if (tag)
{
read_mismatch:;
gcov_error ("profiling:%s:Merge mismatch for %s %u\n",
filename, f_ix >= 0 ? "function" : "summary",
f_ix < 0 ? -1 - f_ix : f_ix);
return -1;
}
return 0;
read_error:
gcov_error ("profiling:%s:%s merging\n", filename,
error < 0 ? "Overflow": "Error");
return -1;
}
static void
gcov_exit (void)
{
struct gcov_info *gi_ptr;
const struct gcov_fn_info *gfi_ptr;
struct gcov_summary this_prg; /* summary for program. */
struct gcov_summary all_prg; /* summary for all instances of program. */
struct gcov_ctr_summary *cs_ptr;
const struct gcov_ctr_info *ci_ptr;
unsigned t_ix;
int f_ix;
gcov_unsigned_t c_num;
const char *gcov_prefix;
int gcov_prefix_strip = 0;
size_t prefix_length;
char *gi_filename, *gi_filename_up;
gcov_unsigned_t crc32 = 0;
memset (&all_prg, 0, sizeof (all_prg));
/* Find the totals for this execution. */
memset (&this_prg, 0, sizeof (this_prg));
for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
{
crc32 = crc32_unsigned (crc32, gi_ptr->stamp);
crc32 = crc32_unsigned (crc32, gi_ptr->n_functions);
for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++)
{
gfi_ptr = gi_ptr->functions[f_ix];
if (gfi_ptr && gfi_ptr->key != gi_ptr)
gfi_ptr = 0;
crc32 = crc32_unsigned (crc32, gfi_ptr ? gfi_ptr->cfg_checksum : 0);
crc32 = crc32_unsigned (crc32,
gfi_ptr ? gfi_ptr->lineno_checksum : 0);
if (!gfi_ptr)
continue;
ci_ptr = gfi_ptr->ctrs;
for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++)
{
if (!gi_ptr->merge[t_ix])
continue;
cs_ptr = &this_prg.ctrs[t_ix];
cs_ptr->num += ci_ptr->num;
crc32 = crc32_unsigned (crc32, ci_ptr->num);
for (c_num = 0; c_num < ci_ptr->num; c_num++)
{
cs_ptr->sum_all += ci_ptr->values[c_num];
if (cs_ptr->run_max < ci_ptr->values[c_num])
cs_ptr->run_max = ci_ptr->values[c_num];
}
ci_ptr++;
}
}
}
{
/* Check if the level of dirs to strip off specified. */
char *tmp = getenv("GCOV_PREFIX_STRIP");
if (tmp)
{
gcov_prefix_strip = atoi (tmp);
/* Do not consider negative values. */
if (gcov_prefix_strip < 0)
gcov_prefix_strip = 0;
}
}
/* Get file name relocation prefix. Non-absolute values are ignored. */
gcov_prefix = getenv("GCOV_PREFIX");
if (gcov_prefix)
{
prefix_length = strlen(gcov_prefix);
/* Remove an unnecessary trailing '/' */
if (IS_DIR_SEPARATOR (gcov_prefix[prefix_length - 1]))
prefix_length--;
}
else
prefix_length = 0;
/* If no prefix was specified and a prefix stip, then we assume
relative. */
if (gcov_prefix_strip != 0 && prefix_length == 0)
{
gcov_prefix = ".";
prefix_length = 1;
}
/* Allocate and initialize the filename scratch space plus one. */
gi_filename = (char *) alloca (prefix_length + gcov_max_filename + 2
+ GCOV_TARGET_SUFFIX_LENGTH);
if (prefix_length)
memcpy (gi_filename, gcov_prefix, prefix_length);
gi_filename_up = gi_filename + prefix_length;
/* Now merge each file. */
for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
{
unsigned n_counts;
struct gcov_summary prg; /* summary for this object over all
program. */
struct gcov_ctr_summary *cs_prg, *cs_tprg, *cs_all;
int error = 0;
gcov_unsigned_t tag, length;
gcov_position_t summary_pos = 0;
gcov_position_t eof_pos = 0;
const char *fname, *s;
struct gcov_fn_buffer *fn_buffer = 0;
struct gcov_fn_buffer **fn_tail = &fn_buffer;
fname = gi_ptr->filename;
/* Avoid to add multiple drive letters into combined path. */
if (prefix_length != 0 && HAS_DRIVE_SPEC(fname))
fname += 2;
/* Build relocated filename, stripping off leading
directories from the initial filename if requested. */
if (gcov_prefix_strip > 0)
{
int level = 0;
s = fname;
if (IS_DIR_SEPARATOR(*s))
++s;
/* Skip selected directory levels. */
for (; (*s != '\0') && (level < gcov_prefix_strip); s++)
if (IS_DIR_SEPARATOR(*s))
{
fname = s;
level++;
}
}
/* Update complete filename with stripped original. */
if (prefix_length != 0 && !IS_DIR_SEPARATOR (*fname))
{
/* If prefix is given, add directory separator. */
strcpy (gi_filename_up, "/");
strcpy (gi_filename_up + 1, fname);
}
else
strcpy (gi_filename_up, fname);
#ifdef ADD_GCOV_TARGET_SUFFIX
/* Give a chance to target to change the name. */
ADD_GCOV_TARGET_SUFFIX (gi_filename_up);
#endif
if (!gcov_open (gi_filename))
{
/* Open failed likely due to missed directory.
Create directory and retry to open file. */
if (create_file_directory (gi_filename))
{
fprintf (stderr, "profiling:%s:Skip\n", gi_filename);
continue;
}
if (!gcov_open (gi_filename))
{
fprintf (stderr, "profiling:%s:Cannot open\n", gi_filename);
continue;
}
}
tag = gcov_read_unsigned ();
if (tag)
{
/* Merge data from file. */
if (tag != GCOV_DATA_MAGIC)
{
fprintf (stderr, "profiling:%s:Not a gcov data file\n",
gi_filename);
goto read_fatal;
}
length = gcov_read_unsigned ();
if (!gcov_version (gi_ptr, length, gi_filename))
goto read_fatal;
length = gcov_read_unsigned ();
if (length != gi_ptr->stamp)
/* Read from a different compilation. Overwrite the file. */
goto rewrite;
/* Look for program summary. */
for (f_ix = 0;;)
{
struct gcov_summary tmp;
eof_pos = gcov_position ();
tag = gcov_read_unsigned ();
if (tag != GCOV_TAG_PROGRAM_SUMMARY)
break;
f_ix--;
length = gcov_read_unsigned ();
if (length != GCOV_TAG_SUMMARY_LENGTH)
goto read_mismatch;
gcov_read_summary (&tmp);
if ((error = gcov_is_error ()))
goto read_error;
if (summary_pos || tmp.checksum != crc32)
goto next_summary;
for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++)
if (tmp.ctrs[t_ix].num != this_prg.ctrs[t_ix].num)
goto next_summary;
prg = tmp;
summary_pos = eof_pos;
next_summary:;
}
/* Merge execution counts for each function. */
for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions;
f_ix++, tag = gcov_read_unsigned ())
{
gfi_ptr = gi_ptr->functions[f_ix];
if (tag != GCOV_TAG_FUNCTION)
goto read_mismatch;
length = gcov_read_unsigned ();
if (!length)
/* This function did not appear in the other program.
We have nothing to merge. */
continue;
if (length != GCOV_TAG_FUNCTION_LENGTH)
goto read_mismatch;
if (!gfi_ptr || gfi_ptr->key != gi_ptr)
{
/* This function appears in the other program. We
need to buffer the information in order to write
it back out -- we'll be inserting data before
this point, so cannot simply keep the data in the
file. */
fn_tail = buffer_fn_data (gi_filename,
gi_ptr, fn_tail, f_ix);
if (!fn_tail)
goto read_mismatch;
continue;
}
length = gcov_read_unsigned ();
if (length != gfi_ptr->ident)
goto read_mismatch;
length = gcov_read_unsigned ();
if (length != gfi_ptr->lineno_checksum)
goto read_mismatch;
length = gcov_read_unsigned ();
if (length != gfi_ptr->cfg_checksum)
goto read_mismatch;
ci_ptr = gfi_ptr->ctrs;
for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
{
gcov_merge_fn merge = gi_ptr->merge[t_ix];
if (!merge)
continue;
tag = gcov_read_unsigned ();
length = gcov_read_unsigned ();
if (tag != GCOV_TAG_FOR_COUNTER (t_ix)
|| length != GCOV_TAG_COUNTER_LENGTH (ci_ptr->num))
goto read_mismatch;
(*merge) (ci_ptr->values, ci_ptr->num);
ci_ptr++;
}
if ((error = gcov_is_error ()))
goto read_error;
}
if (tag)
{
read_mismatch:;
fprintf (stderr, "profiling:%s:Merge mismatch for %s %u\n",
gi_filename, f_ix >= 0 ? "function" : "summary",
f_ix < 0 ? -1 - f_ix : f_ix);
goto read_fatal;
}
}
goto rewrite;
read_error:;
fprintf (stderr, "profiling:%s:%s merging\n", gi_filename,
error < 0 ? "Overflow": "Error");
goto read_fatal;
rewrite:;
gcov_rewrite ();
if (!summary_pos)
{
memset (&prg, 0, sizeof (prg));
summary_pos = eof_pos;
}
/* Merge the summaries. */
for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++)
{
cs_prg = &prg.ctrs[t_ix];
cs_tprg = &this_prg.ctrs[t_ix];
cs_all = &all_prg.ctrs[t_ix];
if (gi_ptr->merge[t_ix])
{
if (!cs_prg->runs++)
cs_prg->num = cs_tprg->num;
cs_prg->sum_all += cs_tprg->sum_all;
if (cs_prg->run_max < cs_tprg->run_max)
cs_prg->run_max = cs_tprg->run_max;
cs_prg->sum_max += cs_tprg->run_max;
}
else if (cs_prg->runs)
goto read_mismatch;
if (!cs_all->runs && cs_prg->runs)
memcpy (cs_all, cs_prg, sizeof (*cs_all));
else if (!all_prg.checksum
&& (!GCOV_LOCKED || cs_all->runs == cs_prg->runs)
&& memcmp (cs_all, cs_prg, sizeof (*cs_all)))
{
fprintf (stderr, "profiling:%s:Invocation mismatch - some data files may have been removed%s\n",
gi_filename, GCOV_LOCKED
? "" : " or concurrently updated without locking support");
all_prg.checksum = ~0u;
}
}
prg.checksum = crc32;
/* Write out the data. */
if (!eof_pos)
{
gcov_write_tag_length (GCOV_DATA_MAGIC, GCOV_VERSION);
gcov_write_unsigned (gi_ptr->stamp);
}
if (summary_pos)
gcov_seek (summary_pos);
/* Generate whole program statistics. */
gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &prg);
if (summary_pos < eof_pos)
gcov_seek (eof_pos);
/* Write execution counts for each function. */
for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++)
{
unsigned buffered = 0;
if (fn_buffer && fn_buffer->fn_ix == (unsigned)f_ix)
{
/* Buffered data from another program. */
buffered = 1;
gfi_ptr = &fn_buffer->info;
length = GCOV_TAG_FUNCTION_LENGTH;
}
else
{
gfi_ptr = gi_ptr->functions[f_ix];
if (gfi_ptr && gfi_ptr->key == gi_ptr)
length = GCOV_TAG_FUNCTION_LENGTH;
else
length = 0;
}
gcov_write_tag_length (GCOV_TAG_FUNCTION, length);
if (!length)
continue;
gcov_write_unsigned (gfi_ptr->ident);
gcov_write_unsigned (gfi_ptr->lineno_checksum);
gcov_write_unsigned (gfi_ptr->cfg_checksum);
ci_ptr = gfi_ptr->ctrs;
for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
{
if (!gi_ptr->merge[t_ix])
continue;
n_counts = ci_ptr->num;
gcov_write_tag_length (GCOV_TAG_FOR_COUNTER (t_ix),
GCOV_TAG_COUNTER_LENGTH (n_counts));
gcov_type *c_ptr = ci_ptr->values;
while (n_counts--)
gcov_write_counter (*c_ptr++);
ci_ptr++;
}
if (buffered)
fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS);
}
gcov_write_unsigned (0);
read_fatal:;
while (fn_buffer)
fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS);
if ((error = gcov_close ()))
fprintf (stderr, error < 0 ?
"profiling:%s:Overflow writing\n" :
"profiling:%s:Error writing\n",
gi_filename);
}
}