| /* Routines required for instrumenting a program. */ |
| /* Compile this one with gcc. */ |
| /* Copyright (C) 1989-2014 Free Software Foundation, Inc. |
| |
| 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 3, 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. |
| |
| Under Section 7 of GPL version 3, you are granted additional |
| permissions described in the GCC Runtime Library Exception, version |
| 3.1, as published by the Free Software Foundation. |
| |
| You should have received a copy of the GNU General Public License and |
| a copy of the GCC Runtime Library Exception along with this program; |
| see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include "libgcov.h" |
| |
| #if defined(inhibit_libc) |
| /* If libc and its header files are not available, provide dummy functions. */ |
| |
| #if defined(L_gcov) |
| void __gcov_init (struct gcov_info *p __attribute__ ((unused))) {} |
| #endif |
| |
| #else /* inhibit_libc */ |
| |
| #include <string.h> |
| #if GCOV_LOCKED |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <sys/stat.h> |
| #endif |
| |
| #ifdef L_gcov |
| #include "gcov-io.c" |
| |
| /* The following functions can be called from outside of this file. */ |
| extern void gcov_clear (void) ATTRIBUTE_HIDDEN; |
| extern void gcov_exit (void) ATTRIBUTE_HIDDEN; |
| extern void set_gcov_dump_complete (void) ATTRIBUTE_HIDDEN; |
| extern void reset_gcov_dump_complete (void) ATTRIBUTE_HIDDEN; |
| extern int get_gcov_dump_complete (void) ATTRIBUTE_HIDDEN; |
| extern void set_gcov_list (struct gcov_info *) ATTRIBUTE_HIDDEN; |
| |
| struct gcov_fn_buffer |
| { |
| struct gcov_fn_buffer *next; |
| unsigned fn_ix; |
| struct gcov_fn_info info; |
| /* note gcov_fn_info ends in a trailing array. */ |
| }; |
| |
| struct gcov_summary_buffer |
| { |
| struct gcov_summary_buffer *next; |
| struct gcov_summary summary; |
| }; |
| |
| /* Chain of per-object gcov structures. */ |
| static struct gcov_info *gcov_list; |
| |
| /* Set the head of gcov_list. */ |
| void |
| set_gcov_list (struct gcov_info *head) |
| { |
| gcov_list = head; |
| } |
| |
| /* Size of the longest file name. */ |
| static size_t gcov_max_filename = 0; |
| |
| /* Flag when the profile has already been dumped via __gcov_dump(). */ |
| static int gcov_dump_complete; |
| |
| /* A global function that get the vaule of gcov_dump_complete. */ |
| |
| int |
| get_gcov_dump_complete (void) |
| { |
| return gcov_dump_complete; |
| } |
| |
| /* A global functino that set the vaule of gcov_dump_complete. Will |
| be used in __gcov_dump() in libgcov-interface.c. */ |
| |
| void |
| set_gcov_dump_complete (void) |
| { |
| gcov_dump_complete = 1; |
| } |
| |
| /* A global functino that set the vaule of gcov_dump_complete. Will |
| be used in __gcov_reset() in libgcov-interface.c. */ |
| |
| void |
| reset_gcov_dump_complete (void) |
| { |
| gcov_dump_complete = 0; |
| } |
| |
| /* A utility function for outputing errors. */ |
| static int gcov_error (const char *, ...); |
| |
| static struct gcov_fn_buffer * |
| free_fn_data (const struct gcov_info *gi_ptr, struct gcov_fn_buffer *buffer, |
| unsigned limit) |
| { |
| struct gcov_fn_buffer *next; |
| unsigned ix, n_ctr = 0; |
| |
| if (!buffer) |
| return 0; |
| next = buffer->next; |
| |
| for (ix = 0; ix != limit; ix++) |
| if (gi_ptr->merge[ix]) |
| free (buffer->info.ctrs[n_ctr++].values); |
| free (buffer); |
| return next; |
| } |
| |
| static struct gcov_fn_buffer ** |
| buffer_fn_data (const char *filename, const struct gcov_info *gi_ptr, |
| struct gcov_fn_buffer **end_ptr, unsigned fn_ix) |
| { |
| unsigned n_ctrs = 0, ix = 0; |
| struct gcov_fn_buffer *fn_buffer; |
| unsigned len; |
| |
| for (ix = GCOV_COUNTERS; ix--;) |
| if (gi_ptr->merge[ix]) |
| n_ctrs++; |
| |
| len = sizeof (*fn_buffer) + sizeof (fn_buffer->info.ctrs[0]) * n_ctrs; |
| fn_buffer = (struct gcov_fn_buffer *) xmalloc (len); |
| |
| if (!fn_buffer) |
| goto fail; |
| |
| fn_buffer->next = 0; |
| fn_buffer->fn_ix = fn_ix; |
| fn_buffer->info.ident = gcov_read_unsigned (); |
| fn_buffer->info.lineno_checksum = gcov_read_unsigned (); |
| fn_buffer->info.cfg_checksum = gcov_read_unsigned (); |
| |
| for (n_ctrs = ix = 0; ix != GCOV_COUNTERS; ix++) |
| { |
| gcov_unsigned_t length; |
| gcov_type *values; |
| |
| if (!gi_ptr->merge[ix]) |
| continue; |
| |
| if (gcov_read_unsigned () != GCOV_TAG_FOR_COUNTER (ix)) |
| { |
| len = 0; |
| goto fail; |
| } |
| |
| length = GCOV_TAG_COUNTER_NUM (gcov_read_unsigned ()); |
| len = length * sizeof (gcov_type); |
| values = (gcov_type *) xmalloc (len); |
| if (!values) |
| goto fail; |
| |
| fn_buffer->info.ctrs[n_ctrs].num = length; |
| fn_buffer->info.ctrs[n_ctrs].values = values; |
| |
| while (length--) |
| *values++ = gcov_read_counter (); |
| n_ctrs++; |
| } |
| |
| *end_ptr = fn_buffer; |
| return &fn_buffer->next; |
| |
| fail: |
| gcov_error ("profiling:%s:Function %u %s %u \n", filename, fn_ix, |
| len ? "cannot allocate" : "counter mismatch", len ? len : ix); |
| |
| return (struct gcov_fn_buffer **)free_fn_data (gi_ptr, fn_buffer, ix); |
| } |
| |
| /* Add an unsigned value to the current crc */ |
| |
| static gcov_unsigned_t |
| crc32_unsigned (gcov_unsigned_t crc32, gcov_unsigned_t value) |
| { |
| unsigned ix; |
| |
| for (ix = 32; ix--; value <<= 1) |
| { |
| unsigned feedback; |
| |
| feedback = (value ^ crc32) & 0x80000000 ? 0x04c11db7 : 0; |
| crc32 <<= 1; |
| crc32 ^= feedback; |
| } |
| |
| return crc32; |
| } |
| |
| /* Check if VERSION of the info block PTR matches libgcov one. |
| Return 1 on success, or zero in case of versions mismatch. |
| If FILENAME is not NULL, its value used for reporting purposes |
| instead of value from the info block. */ |
| |
| static int |
| gcov_version (struct gcov_info *ptr, gcov_unsigned_t version, |
| const char *filename) |
| { |
| if (version != GCOV_VERSION) |
| { |
| char v[4], e[4]; |
| |
| GCOV_UNSIGNED2STRING (v, version); |
| GCOV_UNSIGNED2STRING (e, GCOV_VERSION); |
| |
| gcov_error ("profiling:%s:Version mismatch - expected %.4s got %.4s\n", |
| filename? filename : ptr->filename, e, v); |
| return 0; |
| } |
| return 1; |
| } |
| |
| /* Insert counter VALUE into HISTOGRAM. */ |
| |
| static void |
| gcov_histogram_insert(gcov_bucket_type *histogram, gcov_type value) |
| { |
| unsigned i; |
| |
| i = gcov_histo_index(value); |
| histogram[i].num_counters++; |
| histogram[i].cum_value += value; |
| if (value < histogram[i].min_value) |
| histogram[i].min_value = value; |
| } |
| |
| /* Computes a histogram of the arc counters to place in the summary SUM. */ |
| |
| static void |
| gcov_compute_histogram (struct gcov_summary *sum) |
| { |
| struct gcov_info *gi_ptr; |
| const struct gcov_fn_info *gfi_ptr; |
| const struct gcov_ctr_info *ci_ptr; |
| struct gcov_ctr_summary *cs_ptr; |
| unsigned t_ix, f_ix, ctr_info_ix, ix; |
| int h_ix; |
| |
| /* This currently only applies to arc counters. */ |
| t_ix = GCOV_COUNTER_ARCS; |
| |
| /* First check if there are any counts recorded for this counter. */ |
| cs_ptr = &(sum->ctrs[t_ix]); |
| if (!cs_ptr->num) |
| return; |
| |
| for (h_ix = 0; h_ix < GCOV_HISTOGRAM_SIZE; h_ix++) |
| { |
| cs_ptr->histogram[h_ix].num_counters = 0; |
| cs_ptr->histogram[h_ix].min_value = cs_ptr->run_max; |
| cs_ptr->histogram[h_ix].cum_value = 0; |
| } |
| |
| /* Walk through all the per-object structures and record each of |
| the count values in histogram. */ |
| for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) |
| { |
| if (!gi_ptr->merge[t_ix]) |
| continue; |
| |
| /* Find the appropriate index into the gcov_ctr_info array |
| for the counter we are currently working on based on the |
| existence of the merge function pointer for this object. */ |
| for (ix = 0, ctr_info_ix = 0; ix < t_ix; ix++) |
| { |
| if (gi_ptr->merge[ix]) |
| ctr_info_ix++; |
| } |
| for (f_ix = 0; f_ix != gi_ptr->n_functions; f_ix++) |
| { |
| gfi_ptr = gi_ptr->functions[f_ix]; |
| |
| if (!gfi_ptr || gfi_ptr->key != gi_ptr) |
| continue; |
| |
| ci_ptr = &gfi_ptr->ctrs[ctr_info_ix]; |
| for (ix = 0; ix < ci_ptr->num; ix++) |
| gcov_histogram_insert (cs_ptr->histogram, ci_ptr->values[ix]); |
| } |
| } |
| } |
| |
| /* gcda filename. */ |
| static char *gi_filename; |
| /* buffer for the fn_data from another program. */ |
| static struct gcov_fn_buffer *fn_buffer; |
| /* buffer for summary from other programs to be written out. */ |
| static struct gcov_summary_buffer *sum_buffer; |
| /* If application calls fork or exec multiple times, we end up storing |
| profile repeadely. We should not account this as multiple runs or |
| functions executed once may mistakely become cold. */ |
| static int run_accounted = 0; |
| |
| /* This funtions computes the program level summary and the histo-gram. |
| It computes and returns CRC32 and stored summary in THIS_PRG. */ |
| |
| static gcov_unsigned_t |
| gcov_exit_compute_summary (struct gcov_summary *this_prg) |
| { |
| struct gcov_info *gi_ptr; |
| const struct gcov_fn_info *gfi_ptr; |
| struct gcov_ctr_summary *cs_ptr; |
| const struct gcov_ctr_info *ci_ptr; |
| int f_ix; |
| unsigned t_ix; |
| gcov_unsigned_t c_num; |
| gcov_unsigned_t crc32 = 0; |
| |
| /* 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++; |
| } |
| } |
| } |
| gcov_compute_histogram (this_prg); |
| return crc32; |
| } |
| |
| /* A struct that bundles all the related information about the |
| gcda filename. */ |
| struct gcov_filename_aux{ |
| char *gi_filename_up; |
| int gcov_prefix_strip; |
| size_t prefix_length; |
| }; |
| |
| /* Including system dependent components. */ |
| #include "libgcov-driver-system.c" |
| |
| /* This function merges counters in GI_PTR to an existing gcda file. |
| Return 0 on success. |
| Return -1 on error. In this case, caller will goto read_fatal. */ |
| |
| static int |
| gcov_exit_merge_gcda (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, gi_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 (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:; |
| gcov_error ("profiling:%s:Merge mismatch for %s %u\n", |
| gi_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", gi_filename, |
| error < 0 ? "Overflow": "Error"); |
| return -1; |
| } |
| |
| /* Write counters in GI_PTR and the summary in PRG to a gcda file. In |
| the case of appending to an existing file, SUMMARY_POS will be non-zero. |
| We will write the file starting from SUMMAY_POS. */ |
| |
| static void |
| gcov_exit_write_gcda (const struct gcov_info *gi_ptr, |
| const struct gcov_summary *prg_p, |
| const gcov_position_t eof_pos, |
| const gcov_position_t summary_pos) |
| { |
| unsigned f_ix; |
| struct gcov_summary_buffer *next_sum_buffer; |
| |
| /* 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_p); |
| |
| /* Rewrite all the summaries that were after the summary we merged |
| into. This is necessary as the merged summary may have a different |
| size due to the number of non-zero histogram entries changing after |
| merging. */ |
| |
| while (sum_buffer) |
| { |
| gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &sum_buffer->summary); |
| next_sum_buffer = sum_buffer->next; |
| free (sum_buffer); |
| sum_buffer = next_sum_buffer; |
| } |
| |
| /* Write execution counts for each function. */ |
| for (f_ix = 0; f_ix != gi_ptr->n_functions; f_ix++) |
| { |
| unsigned buffered = 0; |
| const struct gcov_fn_info *gfi_ptr; |
| const struct gcov_ctr_info *ci_ptr; |
| gcov_unsigned_t length; |
| unsigned t_ix; |
| |
| if (fn_buffer && fn_buffer->fn_ix == 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++) |
| { |
| gcov_unsigned_t n_counts; |
| gcov_type *c_ptr; |
| |
| 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)); |
| 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); |
| } |
| |
| /* Helper function for merging summary. |
| Return -1 on error. Return 0 on success. */ |
| |
| static int |
| gcov_exit_merge_summary (const struct gcov_info *gi_ptr, struct gcov_summary *prg, |
| struct gcov_summary *this_prg, gcov_unsigned_t crc32, |
| struct gcov_summary *all_prg __attribute__ ((unused))) |
| { |
| struct gcov_ctr_summary *cs_prg, *cs_tprg; |
| unsigned t_ix; |
| #if !GCOV_LOCKED |
| /* summary for all instances of program. */ |
| struct gcov_ctr_summary *cs_all; |
| #endif |
| |
| /* 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]); |
| |
| if (gi_ptr->merge[t_ix]) |
| { |
| int first = !cs_prg->runs; |
| |
| if (!run_accounted) |
| cs_prg->runs++; |
| if (first) |
| 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; |
| if (first) |
| memcpy (cs_prg->histogram, cs_tprg->histogram, |
| sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE); |
| else |
| gcov_histogram_merge (cs_prg->histogram, cs_tprg->histogram); |
| } |
| else if (cs_prg->runs) |
| { |
| gcov_error ("profiling:%s:Merge mismatch for summary.\n", |
| gi_filename); |
| return -1; |
| } |
| #if !GCOV_LOCKED |
| cs_all = &all_prg->ctrs[t_ix]; |
| if (!cs_all->runs && cs_prg->runs) |
| { |
| cs_all->num = cs_prg->num; |
| cs_all->runs = cs_prg->runs; |
| cs_all->sum_all = cs_prg->sum_all; |
| cs_all->run_max = cs_prg->run_max; |
| cs_all->sum_max = cs_prg->sum_max; |
| } |
| else if (!all_prg->checksum |
| /* Don't compare the histograms, which may have slight |
| variations depending on the order they were updated |
| due to the truncating integer divides used in the |
| merge. */ |
| && (cs_all->num != cs_prg->num |
| || cs_all->runs != cs_prg->runs |
| || cs_all->sum_all != cs_prg->sum_all |
| || cs_all->run_max != cs_prg->run_max |
| || cs_all->sum_max != cs_prg->sum_max)) |
| { |
| gcov_error ("profiling:%s:Data file mismatch - some " |
| "data files may have been concurrently " |
| "updated without locking support\n", gi_filename); |
| all_prg->checksum = ~0u; |
| } |
| #endif |
| } |
| |
| prg->checksum = crc32; |
| |
| return 0; |
| } |
| |
| /* Dump the coverage counts for one gcov_info object. We merge with existing |
| counts when possible, to avoid growing the .da files ad infinitum. We use |
| this program's checksum to make sure we only accumulate whole program |
| statistics to the correct summary. An object file might be embedded |
| in two separate programs, and we must keep the two program |
| summaries separate. */ |
| |
| static void |
| gcov_exit_dump_gcov (struct gcov_info *gi_ptr, struct gcov_filename_aux *gf, |
| gcov_unsigned_t crc32, struct gcov_summary *all_prg, |
| struct gcov_summary *this_prg) |
| { |
| struct gcov_summary prg; /* summary for this object over all program. */ |
| int error; |
| gcov_unsigned_t tag; |
| gcov_position_t summary_pos = 0; |
| gcov_position_t eof_pos = 0; |
| |
| fn_buffer = 0; |
| sum_buffer = 0; |
| |
| error = gcov_exit_open_gcda_file (gi_ptr, gf); |
| if (error == -1) |
| return; |
| |
| tag = gcov_read_unsigned (); |
| if (tag) |
| { |
| /* Merge data from file. */ |
| if (tag != GCOV_DATA_MAGIC) |
| { |
| gcov_error ("profiling:%s:Not a gcov data file\n", gi_filename); |
| goto read_fatal; |
| } |
| error = gcov_exit_merge_gcda (gi_ptr, &prg, this_prg, &summary_pos, &eof_pos, |
| crc32); |
| if (error == -1) |
| goto read_fatal; |
| } |
| |
| gcov_rewrite (); |
| |
| if (!summary_pos) |
| { |
| memset (&prg, 0, sizeof (prg)); |
| summary_pos = eof_pos; |
| } |
| |
| error = gcov_exit_merge_summary (gi_ptr, &prg, this_prg, crc32, all_prg); |
| if (error == -1) |
| goto read_fatal; |
| |
| gcov_exit_write_gcda (gi_ptr, &prg, eof_pos, summary_pos); |
| /* fall through */ |
| |
| read_fatal:; |
| while (fn_buffer) |
| fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS); |
| |
| if ((error = gcov_close ())) |
| gcov_error (error < 0 ? |
| "profiling:%s:Overflow writing\n" : |
| "profiling:%s:Error writing\n", |
| gi_filename); |
| } |
| |
| |
| /* Dump all the coverage counts for the program. It first computes program |
| summary and then traverses gcov_list list and dumps the gcov_info |
| objects one by one. */ |
| |
| void |
| gcov_exit (void) |
| { |
| struct gcov_info *gi_ptr; |
| struct gcov_filename_aux gf; |
| gcov_unsigned_t crc32; |
| struct gcov_summary all_prg; |
| struct gcov_summary this_prg; |
| |
| /* Prevent the counters from being dumped a second time on exit when the |
| application already wrote out the profile using __gcov_dump(). */ |
| if (gcov_dump_complete) |
| return; |
| |
| crc32 = gcov_exit_compute_summary (&this_prg); |
| |
| allocate_filename_struct (&gf); |
| #if !GCOV_LOCKED |
| memset (&all_prg, 0, sizeof (all_prg)); |
| #endif |
| |
| /* Now merge each file. */ |
| for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) |
| gcov_exit_dump_gcov (gi_ptr, &gf, crc32, &all_prg, &this_prg); |
| run_accounted = 1; |
| |
| if (gi_filename) |
| free (gi_filename); |
| } |
| |
| /* Reset all counters to zero. */ |
| |
| void |
| gcov_clear (void) |
| { |
| const struct gcov_info *gi_ptr; |
| |
| for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) |
| { |
| unsigned f_ix; |
| |
| for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++) |
| { |
| unsigned t_ix; |
| const struct gcov_fn_info *gfi_ptr = gi_ptr->functions[f_ix]; |
| |
| if (!gfi_ptr || gfi_ptr->key != gi_ptr) |
| continue; |
| const struct gcov_ctr_info *ci_ptr = gfi_ptr->ctrs; |
| for (t_ix = 0; t_ix != GCOV_COUNTERS; t_ix++) |
| { |
| if (!gi_ptr->merge[t_ix]) |
| continue; |
| |
| memset (ci_ptr->values, 0, sizeof (gcov_type) * ci_ptr->num); |
| ci_ptr++; |
| } |
| } |
| } |
| } |
| |
| /* Add a new object file onto the bb chain. Invoked automatically |
| when running an object file's global ctors. */ |
| |
| void |
| __gcov_init (struct gcov_info *info) |
| { |
| if (!info->version || !info->n_functions) |
| return; |
| if (gcov_version (info, info->version, 0)) |
| { |
| size_t filename_length = strlen(info->filename); |
| |
| /* Refresh the longest file name information */ |
| if (filename_length > gcov_max_filename) |
| gcov_max_filename = filename_length; |
| |
| if (!gcov_list) |
| atexit (gcov_exit); |
| |
| info->next = gcov_list; |
| gcov_list = info; |
| } |
| info->version = 0; |
| } |
| |
| #endif /* L_gcov */ |
| #endif /* inhibit_libc */ |
