1 /* Read and write coverage files, and associated functionality.
2 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998, 1999,
3 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
4 Contributed by James E. Wilson, UC Berkeley/Cygnus Support;
5 based on some ideas from Dain Samples of UC Berkeley.
6 Further mangling by Bob Manson, Cygnus Support.
7 Further mangled by Nathan Sidwell, CodeSourcery
9 This file is part of GCC.
11 GCC is free software; you can redistribute it and/or modify it under
12 the terms of the GNU General Public License as published by the Free
13 Software Foundation; either version 2, or (at your option) any later
16 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
17 WARRANTY; without even the implied warranty of MERCHANTABILITY or
18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 You should have received a copy of the GNU General Public License
22 along with GCC; see the file COPYING. If not, write to the Free
23 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
31 #include "coretypes.h"
43 #include "langhooks.h"
45 #include "tree-iterator.h"
52 struct function_list *next; /* next function */
53 unsigned ident; /* function ident */
54 unsigned checksum; /* function checksum */
55 unsigned n_ctrs[GCOV_COUNTERS];/* number of counters. */
58 /* Counts information for a function. */
59 typedef struct counts_entry
68 struct gcov_ctr_summary summary;
71 struct counts_entry *chain;
75 static struct function_list *functions_head = 0;
76 static struct function_list **functions_tail = &functions_head;
77 static unsigned no_coverage = 0;
79 /* Cumulative counter information for whole program. */
80 static unsigned prg_ctr_mask; /* Mask of counter types generated. */
81 static unsigned prg_n_ctrs[GCOV_COUNTERS]; /* Total counters allocated. */
83 /* Counter information for current function. */
84 static unsigned fn_ctr_mask; /* Mask of counters used. */
85 static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */
86 static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */
88 /* Name of the output file for coverage output file. */
89 static char *bbg_file_name;
90 static unsigned bbg_file_opened;
91 static int bbg_function_announced;
93 /* Name of the count data file. */
94 static char *da_file_name;
96 /* Hash table of count data. */
97 static htab_t counts_hash = NULL;
99 /* Trees representing the counter table arrays. */
100 static GTY(()) tree tree_ctr_tables[GCOV_COUNTERS];
102 /* The names of the counter tables. Not used if we're
103 generating counters at tree level. */
104 static GTY(()) rtx ctr_labels[GCOV_COUNTERS];
106 /* The names of merge functions for counters. */
107 static const char *const ctr_merge_functions[GCOV_COUNTERS] = GCOV_MERGE_FUNCTIONS;
108 static const char *const ctr_names[GCOV_COUNTERS] = GCOV_COUNTER_NAMES;
110 /* Forward declarations. */
111 static hashval_t htab_counts_entry_hash (const void *);
112 static int htab_counts_entry_eq (const void *, const void *);
113 static void htab_counts_entry_del (void *);
114 static void read_counts_file (void);
115 static unsigned compute_checksum (void);
116 static unsigned coverage_checksum_string (unsigned, const char *);
117 static tree build_fn_info_type (unsigned);
118 static tree build_fn_info_value (const struct function_list *, tree);
119 static tree build_ctr_info_type (void);
120 static tree build_ctr_info_value (unsigned, tree);
121 static tree build_gcov_info (void);
122 static void create_coverage (void);
124 /* Return the type node for gcov_type. */
129 return lang_hooks.types.type_for_size (GCOV_TYPE_SIZE, false);
132 /* Return the type node for gcov_unsigned_t. */
135 get_gcov_unsigned_t (void)
137 return lang_hooks.types.type_for_size (32, true);
141 htab_counts_entry_hash (const void *of)
143 const counts_entry_t *entry = of;
145 return entry->ident * GCOV_COUNTERS + entry->ctr;
149 htab_counts_entry_eq (const void *of1, const void *of2)
151 const counts_entry_t *entry1 = of1;
152 const counts_entry_t *entry2 = of2;
154 return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr;
158 htab_counts_entry_del (void *of)
160 counts_entry_t *entry = of;
162 free (entry->counts);
166 /* Read in the counts file, if available. */
169 read_counts_file (void)
171 gcov_unsigned_t fn_ident = 0;
172 gcov_unsigned_t checksum = -1;
173 counts_entry_t *summaried = NULL;
174 unsigned seen_summary = 0;
178 if (!gcov_open (da_file_name, 1))
181 if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC))
183 warning ("%qs is not a gcov data file", da_file_name);
187 else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION)
191 GCOV_UNSIGNED2STRING (v, tag);
192 GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
194 warning ("%qs is version %q.*s, expected version %q.*s",
195 da_file_name, 4, v, 4, e);
200 /* Read and discard the stamp. */
201 gcov_read_unsigned ();
203 counts_hash = htab_create (10,
204 htab_counts_entry_hash, htab_counts_entry_eq,
205 htab_counts_entry_del);
206 while ((tag = gcov_read_unsigned ()))
208 gcov_unsigned_t length;
209 gcov_position_t offset;
211 length = gcov_read_unsigned ();
212 offset = gcov_position ();
213 if (tag == GCOV_TAG_FUNCTION)
215 fn_ident = gcov_read_unsigned ();
216 checksum = gcov_read_unsigned ();
219 /* We have already seen a summary, this means that this
220 new function begins a new set of program runs. We
221 must unlink the summaried chain. */
222 counts_entry_t *entry, *chain;
224 for (entry = summaried; entry; entry = chain)
226 chain = entry->chain;
233 else if (tag == GCOV_TAG_PROGRAM_SUMMARY)
235 counts_entry_t *entry;
236 struct gcov_summary summary;
238 gcov_read_summary (&summary);
240 for (entry = summaried; entry; entry = entry->chain)
242 struct gcov_ctr_summary *csum = &summary.ctrs[entry->ctr];
244 entry->summary.runs += csum->runs;
245 entry->summary.sum_all += csum->sum_all;
246 if (entry->summary.run_max < csum->run_max)
247 entry->summary.run_max = csum->run_max;
248 entry->summary.sum_max += csum->sum_max;
251 else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident)
253 counts_entry_t **slot, *entry, elt;
254 unsigned n_counts = GCOV_TAG_COUNTER_NUM (length);
257 elt.ident = fn_ident;
258 elt.ctr = GCOV_COUNTER_FOR_TAG (tag);
260 slot = (counts_entry_t **) htab_find_slot
261 (counts_hash, &elt, INSERT);
265 *slot = entry = xcalloc (1, sizeof (counts_entry_t));
266 entry->ident = elt.ident;
267 entry->ctr = elt.ctr;
268 entry->checksum = checksum;
269 entry->summary.num = n_counts;
270 entry->counts = xcalloc (n_counts, sizeof (gcov_type));
272 else if (entry->checksum != checksum)
274 error ("coverage mismatch for function %u while reading execution counters.",
276 error ("checksum is %x instead of %x", entry->checksum, checksum);
277 htab_delete (counts_hash);
280 else if (entry->summary.num != n_counts)
282 error ("coverage mismatch for function %u while reading execution counters.",
284 error ("number of counters is %d instead of %d", entry->summary.num, n_counts);
285 htab_delete (counts_hash);
288 else if (elt.ctr >= GCOV_COUNTERS_SUMMABLE)
290 error ("cannot merge separate %s counters for function %u",
291 ctr_names[elt.ctr], fn_ident);
295 if (elt.ctr < GCOV_COUNTERS_SUMMABLE
296 /* This should always be true for a just allocated entry,
297 and always false for an existing one. Check this way, in
298 case the gcov file is corrupt. */
299 && (!entry->chain || summaried != entry))
301 entry->chain = summaried;
304 for (ix = 0; ix != n_counts; ix++)
305 entry->counts[ix] += gcov_read_counter ();
308 gcov_sync (offset, length);
309 if ((is_error = gcov_is_error ()))
311 error (is_error < 0 ? "%qs has overflowed" : "%qs is corrupted",
313 htab_delete (counts_hash);
321 /* Returns the counters for a particular tag. */
324 get_coverage_counts (unsigned counter, unsigned expected,
325 const struct gcov_ctr_summary **summary)
327 counts_entry_t *entry, elt;
328 gcov_unsigned_t checksum = -1;
330 /* No hash table, no counts. */
333 static int warned = 0;
336 inform ((flag_guess_branch_prob
337 ? "file %s not found, execution counts estimated"
338 : "file %s not found, execution counts assumed to be zero"),
343 elt.ident = current_function_funcdef_no + 1;
345 entry = htab_find (counts_hash, &elt);
348 warning ("no coverage for function %qs found.", IDENTIFIER_POINTER
349 (DECL_ASSEMBLER_NAME (current_function_decl)));
353 checksum = compute_checksum ();
354 if (entry->checksum != checksum)
356 error ("coverage mismatch for function %qs while reading counter %qs.",
357 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)),
359 error ("checksum is %x instead of %x", entry->checksum, checksum);
362 else if (entry->summary.num != expected)
364 error ("coverage mismatch for function %qs while reading counter %qs.",
365 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)),
367 error ("number of counters is %d instead of %d", entry->summary.num, expected);
372 *summary = &entry->summary;
374 return entry->counts;
377 /* Allocate NUM counters of type COUNTER. Returns nonzero if the
378 allocation succeeded. */
381 coverage_counter_alloc (unsigned counter, unsigned num)
389 if (!tree_ctr_tables[counter])
391 /* Generate and save a copy of this so it can be shared. */
392 /* We don't know the size yet; make it big enough that nobody
393 will make any clever transformation on it. */
396 = build_index_type (build_int_cst (NULL_TREE, 1000)); /* replaced later */
397 tree gcov_type_array_type
398 = build_array_type (GCOV_TYPE_NODE, domain_tree);
399 tree_ctr_tables[counter]
400 = build_decl (VAR_DECL, NULL_TREE, gcov_type_array_type);
401 TREE_STATIC (tree_ctr_tables[counter]) = 1;
402 ASM_GENERATE_INTERNAL_LABEL (buf, "LPBX", counter + 1);
403 DECL_NAME (tree_ctr_tables[counter]) = get_identifier (buf);
404 DECL_ALIGN (tree_ctr_tables[counter]) = TYPE_ALIGN (GCOV_TYPE_NODE);
406 fn_b_ctrs[counter] = fn_n_ctrs[counter];
407 fn_n_ctrs[counter] += num;
408 fn_ctr_mask |= 1 << counter;
412 /* Generate a MEM rtl to access COUNTER NO. */
415 rtl_coverage_counter_ref (unsigned counter, unsigned no)
417 enum machine_mode mode = mode_for_size (GCOV_TYPE_SIZE, MODE_INT, 0);
420 gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]);
421 no += prg_n_ctrs[counter] + fn_b_ctrs[counter];
422 if (!ctr_labels[counter])
424 ctr_labels[counter] = gen_rtx_SYMBOL_REF (Pmode,
425 ggc_strdup (IDENTIFIER_POINTER (DECL_NAME
426 (tree_ctr_tables[counter]))));
427 SYMBOL_REF_FLAGS (ctr_labels[counter]) = SYMBOL_FLAG_LOCAL;
429 ref = plus_constant (ctr_labels[counter],
430 GCOV_TYPE_SIZE / BITS_PER_UNIT * no);
431 ref = gen_rtx_MEM (mode, ref);
432 set_mem_alias_set (ref, new_alias_set ());
433 MEM_NOTRAP_P (ref) = 1;
438 /* Generate a tree to access COUNTER NO. */
441 tree_coverage_counter_ref (unsigned counter, unsigned no)
443 tree domain_type = TYPE_DOMAIN (TREE_TYPE (tree_ctr_tables[counter]));
445 gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]);
446 no += prg_n_ctrs[counter] + fn_b_ctrs[counter];
448 /* "no" here is an array index, scaled to bytes later. */
449 return build4 (ARRAY_REF, GCOV_TYPE_NODE, tree_ctr_tables[counter],
450 fold_convert (domain_type,
451 build_int_cst (NULL_TREE, no)),
452 TYPE_MIN_VALUE (domain_type),
453 size_binop (EXACT_DIV_EXPR, TYPE_SIZE_UNIT (GCOV_TYPE_NODE),
454 size_int (TYPE_ALIGN_UNIT (GCOV_TYPE_NODE))));
457 /* Generate a checksum for a string. CHKSUM is the current
461 coverage_checksum_string (unsigned chksum, const char *string)
466 /* Look for everything that looks if it were produced by
467 get_file_function_name_long and zero out the second part
468 that may result from flag_random_seed. This is not critical
469 as the checksums are used only for sanity checking. */
470 for (i = 0; string[i]; i++)
472 if (!strncmp (string + i, "_GLOBAL__", 9))
473 for (i = i + 9; string[i]; i++)
480 for (y = 1; y < 9; y++)
481 if (!(string[i + y] >= '0' && string[i + y] <= '9')
482 && !(string[i + y] >= 'A' && string[i + y] <= 'F'))
484 if (y != 9 || string[i + 9] != '_')
486 for (y = 10; y < 18; y++)
487 if (!(string[i + y] >= '0' && string[i + y] <= '9')
488 && !(string[i + y] >= 'A' && string[i + y] <= 'F'))
492 scan = sscanf (string + i + 10, "%X", &seed);
494 if (seed != crc32_string (0, flag_random_seed))
496 string = dup = xstrdup (string);
497 for (y = 10; y < 18; y++)
504 chksum = crc32_string (chksum, string);
511 /* Compute checksum for the current function. We generate a CRC32. */
514 compute_checksum (void)
516 expanded_location xloc
517 = expand_location (DECL_SOURCE_LOCATION (current_function_decl));
518 unsigned chksum = xloc.line;
520 chksum = coverage_checksum_string (chksum, xloc.file);
521 chksum = coverage_checksum_string
522 (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl)));
527 /* Begin output to the graph file for the current function.
528 Opens the output file, if not already done. Writes the
529 function header, if not already done. Returns nonzero if data
533 coverage_begin_output (void)
538 if (!bbg_function_announced)
540 expanded_location xloc
541 = expand_location (DECL_SOURCE_LOCATION (current_function_decl));
542 unsigned long offset;
544 if (!bbg_file_opened)
546 if (!gcov_open (bbg_file_name, -1))
547 error ("cannot open %s", bbg_file_name);
550 gcov_write_unsigned (GCOV_NOTE_MAGIC);
551 gcov_write_unsigned (GCOV_VERSION);
552 gcov_write_unsigned (local_tick);
557 /* Announce function */
558 offset = gcov_write_tag (GCOV_TAG_FUNCTION);
559 gcov_write_unsigned (current_function_funcdef_no + 1);
560 gcov_write_unsigned (compute_checksum ());
561 gcov_write_string (IDENTIFIER_POINTER
562 (DECL_ASSEMBLER_NAME (current_function_decl)));
563 gcov_write_string (xloc.file);
564 gcov_write_unsigned (xloc.line);
565 gcov_write_length (offset);
567 bbg_function_announced = 1;
569 return !gcov_is_error ();
572 /* Finish coverage data for the current function. Verify no output
573 error has occurred. Save function coverage counts. */
576 coverage_end_function (void)
580 if (bbg_file_opened > 1 && gcov_is_error ())
582 warning ("error writing %qs", bbg_file_name);
583 bbg_file_opened = -1;
588 struct function_list *item;
590 item = xmalloc (sizeof (struct function_list));
592 *functions_tail = item;
593 functions_tail = &item->next;
596 item->ident = current_function_funcdef_no + 1;
597 item->checksum = compute_checksum ();
598 for (i = 0; i != GCOV_COUNTERS; i++)
600 item->n_ctrs[i] = fn_n_ctrs[i];
601 prg_n_ctrs[i] += fn_n_ctrs[i];
602 fn_n_ctrs[i] = fn_b_ctrs[i] = 0;
604 prg_ctr_mask |= fn_ctr_mask;
607 bbg_function_announced = 0;
610 /* Creates the gcov_fn_info RECORD_TYPE. */
613 build_fn_info_type (unsigned int counters)
615 tree type = lang_hooks.types.make_type (RECORD_TYPE);
620 fields = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
623 field = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
624 TREE_CHAIN (field) = fields;
627 array_type = build_int_cst (NULL_TREE, counters - 1);
628 array_type = build_index_type (array_type);
629 array_type = build_array_type (unsigned_type_node, array_type);
632 field = build_decl (FIELD_DECL, NULL_TREE, array_type);
633 TREE_CHAIN (field) = fields;
636 finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE);
641 /* Creates a CONSTRUCTOR for a gcov_fn_info. FUNCTION is
642 the function being processed and TYPE is the gcov_fn_info
646 build_fn_info_value (const struct function_list *function, tree type)
648 tree value = NULL_TREE;
649 tree fields = TYPE_FIELDS (type);
651 tree array_value = NULL_TREE;
654 value = tree_cons (fields, build_int_cstu (get_gcov_unsigned_t (),
655 function->ident), value);
656 fields = TREE_CHAIN (fields);
659 value = tree_cons (fields, build_int_cstu (get_gcov_unsigned_t (),
660 function->checksum), value);
661 fields = TREE_CHAIN (fields);
664 for (ix = 0; ix != GCOV_COUNTERS; ix++)
665 if (prg_ctr_mask & (1 << ix))
667 tree counters = build_int_cstu (unsigned_type_node,
668 function->n_ctrs[ix]);
670 array_value = tree_cons (NULL_TREE, counters, array_value);
673 array_value = build_constructor (TREE_TYPE (fields), nreverse (array_value));
674 value = tree_cons (fields, array_value, value);
676 value = build_constructor (type, nreverse (value));
681 /* Creates the gcov_ctr_info RECORD_TYPE. */
684 build_ctr_info_type (void)
686 tree type = lang_hooks.types.make_type (RECORD_TYPE);
687 tree field, fields = NULL_TREE;
688 tree gcov_ptr_type = build_pointer_type (GCOV_TYPE_NODE);
689 tree gcov_merge_fn_type;
692 field = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
693 TREE_CHAIN (field) = fields;
697 field = build_decl (FIELD_DECL, NULL_TREE, gcov_ptr_type);
698 TREE_CHAIN (field) = fields;
703 build_function_type_list (void_type_node,
704 gcov_ptr_type, unsigned_type_node,
706 field = build_decl (FIELD_DECL, NULL_TREE,
707 build_pointer_type (gcov_merge_fn_type));
708 TREE_CHAIN (field) = fields;
711 finish_builtin_struct (type, "__gcov_ctr_info", fields, NULL_TREE);
716 /* Creates a CONSTRUCTOR for a gcov_ctr_info. COUNTER is
717 the counter being processed and TYPE is the gcov_ctr_info
721 build_ctr_info_value (unsigned int counter, tree type)
723 tree value = NULL_TREE;
724 tree fields = TYPE_FIELDS (type);
728 value = tree_cons (fields,
729 build_int_cstu (get_gcov_unsigned_t (),
730 prg_n_ctrs[counter]),
732 fields = TREE_CHAIN (fields);
734 if (prg_n_ctrs[counter])
738 array_type = build_int_cstu (unsigned_type_node,
739 prg_n_ctrs[counter] - 1);
740 array_type = build_index_type (array_type);
741 array_type = build_array_type (TREE_TYPE (TREE_TYPE (fields)),
744 TREE_TYPE (tree_ctr_tables[counter]) = array_type;
745 DECL_SIZE (tree_ctr_tables[counter]) = TYPE_SIZE (array_type);
746 DECL_SIZE_UNIT (tree_ctr_tables[counter]) = TYPE_SIZE_UNIT (array_type);
747 assemble_variable (tree_ctr_tables[counter], 0, 0, 0);
749 value = tree_cons (fields,
750 build1 (ADDR_EXPR, TREE_TYPE (fields),
751 tree_ctr_tables[counter]),
755 value = tree_cons (fields, null_pointer_node, value);
756 fields = TREE_CHAIN (fields);
758 fn = build_decl (FUNCTION_DECL,
759 get_identifier (ctr_merge_functions[counter]),
760 TREE_TYPE (TREE_TYPE (fields)));
761 DECL_EXTERNAL (fn) = 1;
762 TREE_PUBLIC (fn) = 1;
763 DECL_ARTIFICIAL (fn) = 1;
764 TREE_NOTHROW (fn) = 1;
765 value = tree_cons (fields,
766 build1 (ADDR_EXPR, TREE_TYPE (fields), fn),
769 value = build_constructor (type, nreverse (value));
774 /* Creates the gcov_info RECORD_TYPE and initializer for it. Returns a
778 build_gcov_info (void)
780 unsigned n_ctr_types, ix;
781 tree type, const_type;
782 tree fn_info_type, fn_info_value = NULL_TREE;
783 tree fn_info_ptr_type;
784 tree ctr_info_type, ctr_info_ary_type, ctr_info_value = NULL_TREE;
785 tree field, fields = NULL_TREE;
786 tree value = NULL_TREE;
787 tree filename_string;
791 const struct function_list *fn;
794 /* Count the number of active counters. */
795 for (n_ctr_types = 0, ix = 0; ix != GCOV_COUNTERS; ix++)
796 if (prg_ctr_mask & (1 << ix))
799 type = lang_hooks.types.make_type (RECORD_TYPE);
800 const_type = build_qualified_type (type, TYPE_QUAL_CONST);
803 field = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
804 TREE_CHAIN (field) = fields;
806 value = tree_cons (field, build_int_cstu (TREE_TYPE (field), GCOV_VERSION),
810 field = build_decl (FIELD_DECL, NULL_TREE, build_pointer_type (const_type));
811 TREE_CHAIN (field) = fields;
813 value = tree_cons (field, null_pointer_node, value);
816 field = build_decl (FIELD_DECL, NULL_TREE, get_gcov_unsigned_t ());
817 TREE_CHAIN (field) = fields;
819 value = tree_cons (field, build_int_cstu (TREE_TYPE (field), local_tick),
823 string_type = build_pointer_type (build_qualified_type (char_type_node,
825 field = build_decl (FIELD_DECL, NULL_TREE, string_type);
826 TREE_CHAIN (field) = fields;
828 filename = getpwd ();
829 filename = (filename && da_file_name[0] != '/'
830 ? concat (filename, "/", da_file_name, NULL)
832 filename_len = strlen (filename);
833 filename_string = build_string (filename_len + 1, filename);
834 if (filename != da_file_name)
836 TREE_TYPE (filename_string) = build_array_type
837 (char_type_node, build_index_type
838 (build_int_cst (NULL_TREE, filename_len)));
839 value = tree_cons (field, build1 (ADDR_EXPR, string_type, filename_string),
842 /* Build the fn_info type and initializer. */
843 fn_info_type = build_fn_info_type (n_ctr_types);
844 fn_info_ptr_type = build_pointer_type (build_qualified_type
845 (fn_info_type, TYPE_QUAL_CONST));
846 for (fn = functions_head, n_fns = 0; fn; fn = fn->next, n_fns++)
847 fn_info_value = tree_cons (NULL_TREE,
848 build_fn_info_value (fn, fn_info_type),
854 array_type = build_index_type (build_int_cst (NULL_TREE, n_fns - 1));
855 array_type = build_array_type (fn_info_type, array_type);
857 fn_info_value = build_constructor (array_type, nreverse (fn_info_value));
858 fn_info_value = build1 (ADDR_EXPR, fn_info_ptr_type, fn_info_value);
861 fn_info_value = null_pointer_node;
863 /* number of functions */
864 field = build_decl (FIELD_DECL, NULL_TREE, unsigned_type_node);
865 TREE_CHAIN (field) = fields;
867 value = tree_cons (field,
868 build_int_cstu (unsigned_type_node, n_fns),
872 field = build_decl (FIELD_DECL, NULL_TREE, fn_info_ptr_type);
873 TREE_CHAIN (field) = fields;
875 value = tree_cons (field, fn_info_value, value);
878 field = build_decl (FIELD_DECL, NULL_TREE, unsigned_type_node);
879 TREE_CHAIN (field) = fields;
881 value = tree_cons (field,
882 build_int_cstu (unsigned_type_node, prg_ctr_mask),
886 ctr_info_type = build_ctr_info_type ();
887 ctr_info_ary_type = build_index_type (build_int_cst (NULL_TREE,
889 ctr_info_ary_type = build_array_type (ctr_info_type, ctr_info_ary_type);
890 for (ix = 0; ix != GCOV_COUNTERS; ix++)
891 if (prg_ctr_mask & (1 << ix))
892 ctr_info_value = tree_cons (NULL_TREE,
893 build_ctr_info_value (ix, ctr_info_type),
895 ctr_info_value = build_constructor (ctr_info_ary_type,
896 nreverse (ctr_info_value));
898 field = build_decl (FIELD_DECL, NULL_TREE, ctr_info_ary_type);
899 TREE_CHAIN (field) = fields;
901 value = tree_cons (field, ctr_info_value, value);
903 finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE);
905 value = build_constructor (type, nreverse (value));
910 /* Write out the structure which libgcov uses to locate all the
911 counters. The structures used here must match those defined in
912 gcov-io.h. Write out the constructor to call __gcov_init. */
915 create_coverage (void)
917 tree gcov_info, gcov_init, body, t;
920 no_coverage = 1; /* Disable any further coverage. */
925 t = build_gcov_info ();
927 gcov_info = build_decl (VAR_DECL, NULL_TREE, TREE_TYPE (t));
928 TREE_STATIC (gcov_info) = 1;
929 ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0);
930 DECL_NAME (gcov_info) = get_identifier (name_buf);
931 DECL_INITIAL (gcov_info) = t;
933 /* Build structure. */
934 assemble_variable (gcov_info, 0, 0, 0);
936 /* Build a decl for __gcov_init. */
937 t = build_pointer_type (TREE_TYPE (gcov_info));
938 t = build_function_type_list (void_type_node, t, NULL);
939 t = build_decl (FUNCTION_DECL, get_identifier ("__gcov_init"), t);
941 DECL_EXTERNAL (t) = 1;
944 /* Generate a call to __gcov_init(&gcov_info). */
946 t = build_fold_addr_expr (gcov_info);
947 t = tree_cons (NULL, t, NULL);
948 t = build_function_call_expr (gcov_init, t);
949 append_to_statement_list (t, &body);
951 /* Generate a constructor to run it. */
952 cgraph_build_static_cdtor ('I', body, DEFAULT_INIT_PRIORITY);
955 /* Perform file-level initialization. Read in data file, generate name
959 coverage_init (const char *filename)
961 int len = strlen (filename);
963 /* Name of da file. */
964 da_file_name = xmalloc (len + strlen (GCOV_DATA_SUFFIX) + 1);
965 strcpy (da_file_name, filename);
966 strcat (da_file_name, GCOV_DATA_SUFFIX);
968 /* Name of bbg file. */
969 bbg_file_name = xmalloc (len + strlen (GCOV_NOTE_SUFFIX) + 1);
970 strcpy (bbg_file_name, filename);
971 strcat (bbg_file_name, GCOV_NOTE_SUFFIX);
976 /* Performs file-level cleanup. Close graph file, generate coverage
977 variables and constructor. */
980 coverage_finish (void)
985 int error = gcov_close ();
988 unlink (bbg_file_name);
990 /* Only remove the da file, if we cannot stamp it. If we can
991 stamp it, libgcov will DTRT. */
992 unlink (da_file_name);
996 #include "gt-coverage.h"