diff options
Diffstat (limited to 'libgcc/libgcov.c')
| -rw-r--r-- | libgcc/libgcov.c | 1374 |
1 files changed, 0 insertions, 1374 deletions
diff --git a/libgcc/libgcov.c b/libgcc/libgcov.c deleted file mode 100644 index 3c39331e6ba..00000000000 --- a/libgcc/libgcov.c +++ /dev/null @@ -1,1374 +0,0 @@ -/* Routines required for instrumenting a program. */ -/* Compile this one with gcc. */ -/* Copyright (C) 1989-2013 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 "tconfig.h" -#include "tsystem.h" -#include "coretypes.h" -#include "tm.h" -#include "libgcc_tm.h" -#include "gthr.h" - -#if defined(inhibit_libc) -#define IN_LIBGCOV (-1) -#else -#define IN_LIBGCOV 1 -#if defined(L_gcov) -#define GCOV_LINKAGE /* nothing */ -#endif -#endif -#include "gcov-io.h" - -#if defined(inhibit_libc) -/* If libc and its header files are not available, provide dummy functions. */ - -#ifdef L_gcov -void __gcov_init (struct gcov_info *p __attribute__ ((unused))) {} -void __gcov_flush (void) {} -#endif - -#ifdef L_gcov_reset -void __gcov_reset (void) {} -#endif - -#ifdef L_gcov_dump -void __gcov_dump (void) {} -#endif - -#ifdef L_gcov_merge_add -void __gcov_merge_add (gcov_type *counters __attribute__ ((unused)), - unsigned n_counters __attribute__ ((unused))) {} -#endif - -#ifdef L_gcov_merge_single -void __gcov_merge_single (gcov_type *counters __attribute__ ((unused)), - unsigned n_counters __attribute__ ((unused))) {} -#endif - -#ifdef L_gcov_merge_delta -void __gcov_merge_delta (gcov_type *counters __attribute__ ((unused)), - unsigned n_counters __attribute__ ((unused))) {} -#endif - -#else - -#include <string.h> -#if GCOV_LOCKED -#include <fcntl.h> -#include <errno.h> -#include <sys/stat.h> -#endif - -extern void gcov_clear (void) ATTRIBUTE_HIDDEN; -extern void gcov_exit (void) ATTRIBUTE_HIDDEN; -extern int gcov_dump_complete ATTRIBUTE_HIDDEN; - -#ifdef L_gcov -#include "gcov-io.c" - -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; - -/* Size of the longest file name. */ -static size_t gcov_max_filename = 0; - -/* Flag when the profile has already been dumped via __gcov_dump(). */ -int gcov_dump_complete = 0; - -/* Make sure path component of the given FILENAME exists, create - missing directories. FILENAME must be writable. - Returns zero on success, or -1 if an error occurred. */ - -static int -create_file_directory (char *filename) -{ -#if !defined(TARGET_POSIX_IO) && !defined(_WIN32) - (void) filename; - return -1; -#else - char *s; - - s = filename; - - if (HAS_DRIVE_SPEC(s)) - s += 2; - if (IS_DIR_SEPARATOR(*s)) - ++s; - for (; *s != '\0'; s++) - if (IS_DIR_SEPARATOR(*s)) - { - char sep = *s; - *s = '\0'; - - /* Try to make directory if it doesn't already exist. */ - if (access (filename, F_OK) == -1 -#ifdef TARGET_POSIX_IO - && mkdir (filename, 0755) == -1 -#else - && mkdir (filename) == -1 -#endif - /* The directory might have been made by another process. */ - && errno != EEXIST) - { - fprintf (stderr, "profiling:%s:Cannot create directory\n", - filename); - *s = sep; - return -1; - }; - - *s = sep; - }; - return 0; -#endif -} - -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 *)malloc (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 *)malloc (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: - fprintf (stderr, "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); - - fprintf (stderr, - "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]); - } - } -} - -/* Dump the coverage counts. 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. */ - -void -gcov_exit (void) -{ - struct gcov_info *gi_ptr; - const struct gcov_fn_info *gfi_ptr; - struct gcov_summary this_prg; /* summary for program. */ -#if !GCOV_LOCKED - struct gcov_summary all_prg; /* summary for all instances of program. */ -#endif - 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; - - /* 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; - -#if !GCOV_LOCKED - memset (&all_prg, 0, sizeof (all_prg)); -#endif - /* 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); - - { - /* 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); - 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; -#if !GCOV_LOCKED - struct gcov_ctr_summary *cs_all; -#endif - 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; - struct gcov_summary_buffer *next_sum_buffer, *sum_buffer = 0; - struct gcov_summary_buffer **sum_tail = &sum_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); - - 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 (); - gcov_read_summary (&tmp); - if ((error = gcov_is_error ())) - goto read_error; - if (summary_pos) - { - /* 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 *) - malloc (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 = 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]; - - 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; - if (cs_prg->runs == 1) - 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) - goto read_mismatch; - -#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)) - { - fprintf (stderr, - "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; - - /* 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); - - /* 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; (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); - } -} - -/* 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; -} - -#ifdef __GTHREAD_MUTEX_INIT -ATTRIBUTE_HIDDEN __gthread_mutex_t __gcov_flush_mx = __GTHREAD_MUTEX_INIT; -#define init_mx_once() -#else -__gthread_mutex_t __gcov_flush_mx ATTRIBUTE_HIDDEN; - -static void -init_mx (void) -{ - __GTHREAD_MUTEX_INIT_FUNCTION (&__gcov_flush_mx); -} -static void -init_mx_once (void) -{ - static __gthread_once_t once = __GTHREAD_ONCE_INIT; - __gthread_once (&once, init_mx); -} -#endif - -/* Called before fork or exec - write out profile information gathered so - far and reset it to zero. This avoids duplication or loss of the - profile information gathered so far. */ - -void -__gcov_flush (void) -{ - init_mx_once (); - __gthread_mutex_lock (&__gcov_flush_mx); - - gcov_exit (); - gcov_clear (); - - __gthread_mutex_unlock (&__gcov_flush_mx); -} - -#endif /* L_gcov */ - -#ifdef L_gcov_reset - -/* Function that can be called from application to reset counters to zero, - in order to collect profile in region of interest. */ - -void -__gcov_reset (void) -{ - gcov_clear (); - /* Re-enable dumping to support collecting profile in multiple regions - of interest. */ - gcov_dump_complete = 0; -} - -#endif /* L_gcov_reset */ - -#ifdef L_gcov_dump - -/* Function that can be called from application to write profile collected - so far, in order to collect profile in region of interest. */ - -void -__gcov_dump (void) -{ - gcov_exit (); - /* Prevent profile from being dumped a second time on application exit. */ - gcov_dump_complete = 1; -} - -#endif /* L_gcov_dump */ - -#ifdef L_gcov_merge_add -/* The profile merging function that just adds the counters. It is given - an array COUNTERS of N_COUNTERS old counters and it reads the same number - of counters from the gcov file. */ -void -__gcov_merge_add (gcov_type *counters, unsigned n_counters) -{ - for (; n_counters; counters++, n_counters--) - *counters += gcov_read_counter (); -} -#endif /* L_gcov_merge_add */ - -#ifdef L_gcov_merge_ior -/* The profile merging function that just adds the counters. It is given - an array COUNTERS of N_COUNTERS old counters and it reads the same number - of counters from the gcov file. */ -void -__gcov_merge_ior (gcov_type *counters, unsigned n_counters) -{ - for (; n_counters; counters++, n_counters--) - *counters |= gcov_read_counter (); -} -#endif - -#ifdef L_gcov_merge_single -/* The profile merging function for choosing the most common value. - It is given an array COUNTERS of N_COUNTERS old counters and it - reads the same number of counters from the gcov file. The counters - are split into 3-tuples where the members of the tuple have - meanings: - - -- the stored candidate on the most common value of the measured entity - -- counter - -- total number of evaluations of the value */ -void -__gcov_merge_single (gcov_type *counters, unsigned n_counters) -{ - unsigned i, n_measures; - gcov_type value, counter, all; - - gcc_assert (!(n_counters % 3)); - n_measures = n_counters / 3; - for (i = 0; i < n_measures; i++, counters += 3) - { - value = gcov_read_counter (); - counter = gcov_read_counter (); - all = gcov_read_counter (); - - if (counters[0] == value) - counters[1] += counter; - else if (counter > counters[1]) - { - counters[0] = value; - counters[1] = counter - counters[1]; - } - else - counters[1] -= counter; - counters[2] += all; - } -} -#endif /* L_gcov_merge_single */ - -#ifdef L_gcov_merge_delta -/* The profile merging function for choosing the most common - difference between two consecutive evaluations of the value. It is - given an array COUNTERS of N_COUNTERS old counters and it reads the - same number of counters from the gcov file. The counters are split - into 4-tuples where the members of the tuple have meanings: - - -- the last value of the measured entity - -- the stored candidate on the most common difference - -- counter - -- total number of evaluations of the value */ -void -__gcov_merge_delta (gcov_type *counters, unsigned n_counters) -{ - unsigned i, n_measures; - gcov_type value, counter, all; - - gcc_assert (!(n_counters % 4)); - n_measures = n_counters / 4; - for (i = 0; i < n_measures; i++, counters += 4) - { - /* last = */ gcov_read_counter (); - value = gcov_read_counter (); - counter = gcov_read_counter (); - all = gcov_read_counter (); - - if (counters[1] == value) - counters[2] += counter; - else if (counter > counters[2]) - { - counters[1] = value; - counters[2] = counter - counters[2]; - } - else - counters[2] -= counter; - counters[3] += all; - } -} -#endif /* L_gcov_merge_delta */ - -#ifdef L_gcov_interval_profiler -/* If VALUE is in interval <START, START + STEPS - 1>, then increases the - corresponding counter in COUNTERS. If the VALUE is above or below - the interval, COUNTERS[STEPS] or COUNTERS[STEPS + 1] is increased - instead. */ - -void -__gcov_interval_profiler (gcov_type *counters, gcov_type value, - int start, unsigned steps) -{ - gcov_type delta = value - start; - if (delta < 0) - counters[steps + 1]++; - else if (delta >= steps) - counters[steps]++; - else - counters[delta]++; -} -#endif - -#ifdef L_gcov_pow2_profiler -/* If VALUE is a power of two, COUNTERS[1] is incremented. Otherwise - COUNTERS[0] is incremented. */ - -void -__gcov_pow2_profiler (gcov_type *counters, gcov_type value) -{ - if (value & (value - 1)) - counters[0]++; - else - counters[1]++; -} -#endif - -/* Tries to determine the most common value among its inputs. Checks if the - value stored in COUNTERS[0] matches VALUE. If this is the case, COUNTERS[1] - is incremented. If this is not the case and COUNTERS[1] is not zero, - COUNTERS[1] is decremented. Otherwise COUNTERS[1] is set to one and - VALUE is stored to COUNTERS[0]. This algorithm guarantees that if this - function is called more than 50% of the time with one value, this value - will be in COUNTERS[0] in the end. - - In any case, COUNTERS[2] is incremented. */ - -static inline void -__gcov_one_value_profiler_body (gcov_type *counters, gcov_type value) -{ - if (value == counters[0]) - counters[1]++; - else if (counters[1] == 0) - { - counters[1] = 1; - counters[0] = value; - } - else - counters[1]--; - counters[2]++; -} - -#ifdef L_gcov_one_value_profiler -void -__gcov_one_value_profiler (gcov_type *counters, gcov_type value) -{ - __gcov_one_value_profiler_body (counters, value); -} -#endif - -#ifdef L_gcov_indirect_call_profiler -/* This function exist only for workaround of binutils bug 14342. - Once this compatibility hack is obsolette, it can be removed. */ - -/* By default, the C++ compiler will use function addresses in the - vtable entries. Setting TARGET_VTABLE_USES_DESCRIPTORS to nonzero - tells the compiler to use function descriptors instead. The value - of this macro says how many words wide the descriptor is (normally 2), - but it may be dependent on target flags. Since we do not have access - to the target flags here we just check to see if it is set and use - that to set VTABLE_USES_DESCRIPTORS to 0 or 1. - - It is assumed that the address of a function descriptor may be treated - as a pointer to a function. */ - -#ifdef TARGET_VTABLE_USES_DESCRIPTORS -#define VTABLE_USES_DESCRIPTORS 1 -#else -#define VTABLE_USES_DESCRIPTORS 0 -#endif - -/* Tries to determine the most common value among its inputs. */ -void -__gcov_indirect_call_profiler (gcov_type* counter, gcov_type value, - void* cur_func, void* callee_func) -{ - /* If the C++ virtual tables contain function descriptors then one - function may have multiple descriptors and we need to dereference - the descriptors to see if they point to the same function. */ - if (cur_func == callee_func - || (VTABLE_USES_DESCRIPTORS && callee_func - && *(void **) cur_func == *(void **) callee_func)) - __gcov_one_value_profiler_body (counter, value); -} - -#endif -#ifdef L_gcov_indirect_call_profiler_v2 - -/* These two variables are used to actually track caller and callee. Keep - them in TLS memory so races are not common (they are written to often). - The variables are set directly by GCC instrumented code, so declaration - here must match one in tree-profile.c */ - -#if defined(HAVE_CC_TLS) && !defined (USE_EMUTLS) -__thread -#endif -void * __gcov_indirect_call_callee; -#if defined(HAVE_CC_TLS) && !defined (USE_EMUTLS) -__thread -#endif -gcov_type * __gcov_indirect_call_counters; - -/* By default, the C++ compiler will use function addresses in the - vtable entries. Setting TARGET_VTABLE_USES_DESCRIPTORS to nonzero - tells the compiler to use function descriptors instead. The value - of this macro says how many words wide the descriptor is (normally 2), - but it may be dependent on target flags. Since we do not have access - to the target flags here we just check to see if it is set and use - that to set VTABLE_USES_DESCRIPTORS to 0 or 1. - - It is assumed that the address of a function descriptor may be treated - as a pointer to a function. */ - -#ifdef TARGET_VTABLE_USES_DESCRIPTORS -#define VTABLE_USES_DESCRIPTORS 1 -#else -#define VTABLE_USES_DESCRIPTORS 0 -#endif - -/* Tries to determine the most common value among its inputs. */ -void -__gcov_indirect_call_profiler_v2 (gcov_type value, void* cur_func) -{ - /* If the C++ virtual tables contain function descriptors then one - function may have multiple descriptors and we need to dereference - the descriptors to see if they point to the same function. */ - if (cur_func == __gcov_indirect_call_callee - || (VTABLE_USES_DESCRIPTORS && __gcov_indirect_call_callee - && *(void **) cur_func == *(void **) __gcov_indirect_call_callee)) - __gcov_one_value_profiler_body (__gcov_indirect_call_counters, value); -} -#endif - -#ifdef L_gcov_average_profiler -/* Increase corresponding COUNTER by VALUE. FIXME: Perhaps we want - to saturate up. */ - -void -__gcov_average_profiler (gcov_type *counters, gcov_type value) -{ - counters[0] += value; - counters[1] ++; -} -#endif - -#ifdef L_gcov_ior_profiler -/* Bitwise-OR VALUE into COUNTER. */ - -void -__gcov_ior_profiler (gcov_type *counters, gcov_type value) -{ - *counters |= value; -} -#endif - -#ifdef L_gcov_fork -/* A wrapper for the fork function. Flushes the accumulated profiling data, so - that they are not counted twice. */ - -pid_t -__gcov_fork (void) -{ - pid_t pid; - extern __gthread_mutex_t __gcov_flush_mx; - __gcov_flush (); - pid = fork (); - if (pid == 0) - __GTHREAD_MUTEX_INIT_FUNCTION (&__gcov_flush_mx); - return pid; -} -#endif - -#ifdef L_gcov_execl -/* A wrapper for the execl function. Flushes the accumulated profiling data, so - that they are not lost. */ - -int -__gcov_execl (const char *path, char *arg, ...) -{ - va_list ap, aq; - unsigned i, length; - char **args; - - __gcov_flush (); - - va_start (ap, arg); - va_copy (aq, ap); - - length = 2; - while (va_arg (ap, char *)) - length++; - va_end (ap); - - args = (char **) alloca (length * sizeof (void *)); - args[0] = arg; - for (i = 1; i < length; i++) - args[i] = va_arg (aq, char *); - va_end (aq); - - return execv (path, args); -} -#endif - -#ifdef L_gcov_execlp -/* A wrapper for the execlp function. Flushes the accumulated profiling data, so - that they are not lost. */ - -int -__gcov_execlp (const char *path, char *arg, ...) -{ - va_list ap, aq; - unsigned i, length; - char **args; - - __gcov_flush (); - - va_start (ap, arg); - va_copy (aq, ap); - - length = 2; - while (va_arg (ap, char *)) - length++; - va_end (ap); - - args = (char **) alloca (length * sizeof (void *)); - args[0] = arg; - for (i = 1; i < length; i++) - args[i] = va_arg (aq, char *); - va_end (aq); - - return execvp (path, args); -} -#endif - -#ifdef L_gcov_execle -/* A wrapper for the execle function. Flushes the accumulated profiling data, so - that they are not lost. */ - -int -__gcov_execle (const char *path, char *arg, ...) -{ - va_list ap, aq; - unsigned i, length; - char **args; - char **envp; - - __gcov_flush (); - - va_start (ap, arg); - va_copy (aq, ap); - - length = 2; - while (va_arg (ap, char *)) - length++; - va_end (ap); - - args = (char **) alloca (length * sizeof (void *)); - args[0] = arg; - for (i = 1; i < length; i++) - args[i] = va_arg (aq, char *); - envp = va_arg (aq, char **); - va_end (aq); - - return execve (path, args, envp); -} -#endif - -#ifdef L_gcov_execv -/* A wrapper for the execv function. Flushes the accumulated profiling data, so - that they are not lost. */ - -int -__gcov_execv (const char *path, char *const argv[]) -{ - __gcov_flush (); - return execv (path, argv); -} -#endif - -#ifdef L_gcov_execvp -/* A wrapper for the execvp function. Flushes the accumulated profiling data, so - that they are not lost. */ - -int -__gcov_execvp (const char *path, char *const argv[]) -{ - __gcov_flush (); - return execvp (path, argv); -} -#endif - -#ifdef L_gcov_execve -/* A wrapper for the execve function. Flushes the accumulated profiling data, so - that they are not lost. */ - -int -__gcov_execve (const char *path, char *const argv[], char *const envp[]) -{ - __gcov_flush (); - return execve (path, argv, envp); -} -#endif -#endif /* inhibit_libc */ |