diff options
Diffstat (limited to 'libgcc/libgcov-driver.c')
| -rw-r--r-- | libgcc/libgcov-driver.c | 872 |
1 files changed, 872 insertions, 0 deletions
diff --git a/libgcc/libgcov-driver.c b/libgcc/libgcov-driver.c new file mode 100644 index 00000000000..93bf2fb7ace --- /dev/null +++ b/libgcc/libgcov-driver.c @@ -0,0 +1,872 @@ +/* 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" + +#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. */ + +#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 functino 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 *)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: + 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]); + } + } +} + +/* summary for program. */ +static struct gcov_summary this_prg; +#if !GCOV_LOCKED +/* summary for all instances of program. */ +static struct gcov_summary all_prg; +#endif +/* crc32 for this program. */ +static gcov_unsigned_t crc32; +/* 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; + +/* This funtions computes the program level summary and the histo-gram. + It initializes ALL_PRG, computes CRC32, and stores the summary in + THIS_PRG. All these three variables are file statics. */ + +static void +gcov_exit_compute_summary (void) +{ + 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; + +#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); +} + +/* 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, + gcov_position_t *summary_pos_p, + gcov_position_t *eof_pos_p) +{ + 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 *) + 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_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_ctr_summary *cs_prg, *cs_tprg; +#if !GCOV_LOCKED + struct gcov_ctr_summary *cs_all; +#endif + unsigned t_ix; + + /* 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) + { + 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) +{ + 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, &summary_pos, &eof_pos); + 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); + 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; + + /* 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; + + gcov_exit_compute_summary (); + + allocate_filename_struct (&gf); + + /* Now merge each file. */ + for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next) + gcov_exit_dump_gcov (gi_ptr, &gf); + + 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 */ |