]>
Commit | Line | Data |
---|---|---|
ca29da43 | 1 | /* Read and write coverage files, and associated functionality. |
d1e082c2 | 2 | Copyright (C) 1990-2013 Free Software Foundation, Inc. |
ca29da43 NS |
3 | Contributed by James E. Wilson, UC Berkeley/Cygnus Support; |
4 | based on some ideas from Dain Samples of UC Berkeley. | |
5 | Further mangling by Bob Manson, Cygnus Support. | |
6 | Further mangled by Nathan Sidwell, CodeSourcery | |
7 | ||
8 | This file is part of GCC. | |
9 | ||
10 | GCC is free software; you can redistribute it and/or modify it under | |
11 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 12 | Software Foundation; either version 3, or (at your option) any later |
ca29da43 NS |
13 | version. |
14 | ||
15 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
16 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
17 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
18 | for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
21 | along with GCC; see the file COPYING3. If not see |
22 | <http://www.gnu.org/licenses/>. */ | |
ca29da43 NS |
23 | |
24 | ||
25 | #define GCOV_LINKAGE | |
26 | ||
27 | #include "config.h" | |
28 | #include "system.h" | |
29 | #include "coretypes.h" | |
30 | #include "tm.h" | |
31 | #include "rtl.h" | |
32 | #include "tree.h" | |
33 | #include "flags.h" | |
34 | #include "output.h" | |
35 | #include "regs.h" | |
36 | #include "expr.h" | |
37 | #include "function.h" | |
2d1a4cc1 | 38 | #include "basic-block.h" |
ca29da43 | 39 | #include "toplev.h" |
5773a50f | 40 | #include "tm_p.h" |
ca29da43 | 41 | #include "ggc.h" |
ca29da43 | 42 | #include "coverage.h" |
ca29da43 | 43 | #include "langhooks.h" |
0823efed | 44 | #include "hash-table.h" |
c9b9aa64 RH |
45 | #include "tree-iterator.h" |
46 | #include "cgraph.h" | |
7ee2468b | 47 | #include "dumpfile.h" |
1da2ed5f | 48 | #include "diagnostic-core.h" |
650cfcab | 49 | #include "intl.h" |
ba78087b | 50 | #include "filenames.h" |
9e66e106 | 51 | #include "target.h" |
ca29da43 | 52 | |
10adac51 | 53 | #include "gcov-io.h" |
ca29da43 NS |
54 | #include "gcov-io.c" |
55 | ||
b724567e | 56 | struct GTY((chain_next ("%h.next"))) coverage_data |
ca29da43 | 57 | { |
b724567e | 58 | struct coverage_data *next; /* next function */ |
159b3be1 | 59 | unsigned ident; /* function ident */ |
10adac51 XDL |
60 | unsigned lineno_checksum; /* function lineno checksum */ |
61 | unsigned cfg_checksum; /* function cfg checksum */ | |
5366b186 NS |
62 | tree fn_decl; /* the function decl */ |
63 | tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */ | |
ca29da43 NS |
64 | }; |
65 | ||
66 | /* Counts information for a function. */ | |
67 | typedef struct counts_entry | |
68 | { | |
69 | /* We hash by */ | |
796621e8 | 70 | unsigned ident; |
cdb23767 | 71 | unsigned ctr; |
159b3be1 | 72 | |
ca29da43 | 73 | /* Store */ |
10adac51 XDL |
74 | unsigned lineno_checksum; |
75 | unsigned cfg_checksum; | |
ca29da43 | 76 | gcov_type *counts; |
cdb23767 | 77 | struct gcov_ctr_summary summary; |
5deac340 RG |
78 | |
79 | /* hash_table support. */ | |
5831a5f0 LC |
80 | typedef counts_entry value_type; |
81 | typedef counts_entry compare_type; | |
82 | static inline hashval_t hash (const value_type *); | |
83 | static int equal (const value_type *, const compare_type *); | |
84 | static void remove (value_type *); | |
ca29da43 NS |
85 | } counts_entry_t; |
86 | ||
b724567e NS |
87 | static GTY(()) struct coverage_data *functions_head = 0; |
88 | static struct coverage_data **functions_tail = &functions_head; | |
6d70e6be | 89 | static unsigned no_coverage = 0; |
ca29da43 | 90 | |
cdb23767 NS |
91 | /* Cumulative counter information for whole program. */ |
92 | static unsigned prg_ctr_mask; /* Mask of counter types generated. */ | |
ca29da43 | 93 | |
cdb23767 | 94 | /* Counter information for current function. */ |
71c0e7fc | 95 | static unsigned fn_ctr_mask; /* Mask of counters used. */ |
5366b186 | 96 | static GTY(()) tree fn_v_ctrs[GCOV_COUNTERS]; /* counter variables. */ |
6d70e6be NS |
97 | static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */ |
98 | static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */ | |
ca29da43 | 99 | |
b724567e NS |
100 | /* Coverage info VAR_DECL and function info type nodes. */ |
101 | static GTY(()) tree gcov_info_var; | |
102 | static GTY(()) tree gcov_fn_info_type; | |
103 | static GTY(()) tree gcov_fn_info_ptr_type; | |
104 | ||
efbb59b2 SB |
105 | /* Name of the notes (gcno) output file. The "bbg" prefix is for |
106 | historical reasons, when the notes file contained only the | |
107 | basic block graph notes. | |
108 | If this is NULL we're not writing to the notes file. */ | |
ca29da43 | 109 | static char *bbg_file_name; |
ca29da43 | 110 | |
efbb59b2 | 111 | /* File stamp for notes file. */ |
cb686b99 NS |
112 | static unsigned bbg_file_stamp; |
113 | ||
efbb59b2 | 114 | /* Name of the count data (gcda) file. */ |
ca29da43 NS |
115 | static char *da_file_name; |
116 | ||
09780dfb | 117 | /* The names of merge functions for counters. */ |
9b514d25 NS |
118 | static const char *const ctr_merge_functions[GCOV_COUNTERS] = GCOV_MERGE_FUNCTIONS; |
119 | static const char *const ctr_names[GCOV_COUNTERS] = GCOV_COUNTER_NAMES; | |
09780dfb | 120 | |
ca29da43 | 121 | /* Forward declarations. */ |
159b3be1 | 122 | static void read_counts_file (void); |
5366b186 NS |
123 | static tree build_var (tree, tree, int); |
124 | static void build_fn_info_type (tree, unsigned, tree); | |
b724567e NS |
125 | static void build_info_type (tree, tree); |
126 | static tree build_fn_info (const struct coverage_data *, tree, tree); | |
127 | static tree build_info (tree, tree); | |
128 | static bool coverage_obj_init (void); | |
9771b263 DN |
129 | static vec<constructor_elt, va_gc> *coverage_obj_fn |
130 | (vec<constructor_elt, va_gc> *, tree, struct coverage_data const *); | |
131 | static void coverage_obj_finish (vec<constructor_elt, va_gc> *); | |
251e2ff2 RS |
132 | \f |
133 | /* Return the type node for gcov_type. */ | |
134 | ||
135 | tree | |
136 | get_gcov_type (void) | |
137 | { | |
0f250839 RG |
138 | enum machine_mode mode = smallest_mode_for_size (GCOV_TYPE_SIZE, MODE_INT); |
139 | return lang_hooks.types.type_for_mode (mode, false); | |
251e2ff2 RS |
140 | } |
141 | ||
142 | /* Return the type node for gcov_unsigned_t. */ | |
ca29da43 | 143 | |
251e2ff2 RS |
144 | static tree |
145 | get_gcov_unsigned_t (void) | |
146 | { | |
0f250839 RG |
147 | enum machine_mode mode = smallest_mode_for_size (32, MODE_INT); |
148 | return lang_hooks.types.type_for_mode (mode, true); | |
251e2ff2 | 149 | } |
ca29da43 | 150 | \f |
0823efed | 151 | inline hashval_t |
5831a5f0 | 152 | counts_entry::hash (const value_type *entry) |
ca29da43 | 153 | { |
796621e8 | 154 | return entry->ident * GCOV_COUNTERS + entry->ctr; |
ca29da43 NS |
155 | } |
156 | ||
0823efed | 157 | inline int |
5831a5f0 LC |
158 | counts_entry::equal (const value_type *entry1, |
159 | const compare_type *entry2) | |
ca29da43 | 160 | { |
796621e8 | 161 | return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr; |
ca29da43 NS |
162 | } |
163 | ||
0823efed | 164 | inline void |
5831a5f0 | 165 | counts_entry::remove (value_type *entry) |
ca29da43 | 166 | { |
ca29da43 NS |
167 | free (entry->counts); |
168 | free (entry); | |
169 | } | |
170 | ||
0823efed | 171 | /* Hash table of count data. */ |
5deac340 | 172 | static hash_table <counts_entry> counts_hash; |
0823efed | 173 | |
ca29da43 NS |
174 | /* Read in the counts file, if available. */ |
175 | ||
176 | static void | |
159b3be1 | 177 | read_counts_file (void) |
ca29da43 | 178 | { |
9b514d25 | 179 | gcov_unsigned_t fn_ident = 0; |
5366b186 NS |
180 | struct gcov_summary summary; |
181 | unsigned new_summary = 1; | |
7d63a2fa | 182 | gcov_unsigned_t tag; |
24a4a033 | 183 | int is_error = 0; |
10adac51 XDL |
184 | unsigned lineno_checksum = 0; |
185 | unsigned cfg_checksum = 0; | |
7d63a2fa | 186 | |
ca29da43 NS |
187 | if (!gcov_open (da_file_name, 1)) |
188 | return; | |
159b3be1 | 189 | |
160e2e4f | 190 | if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC)) |
ca29da43 | 191 | { |
d4ee4d25 | 192 | warning (0, "%qs is not a gcov data file", da_file_name); |
ca29da43 NS |
193 | gcov_close (); |
194 | return; | |
195 | } | |
160e2e4f | 196 | else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION) |
ca29da43 | 197 | { |
330d2e2a NS |
198 | char v[4], e[4]; |
199 | ||
200 | GCOV_UNSIGNED2STRING (v, tag); | |
201 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); | |
159b3be1 | 202 | |
d4ee4d25 | 203 | warning (0, "%qs is version %q.*s, expected version %q.*s", |
cb83302c | 204 | da_file_name, 4, v, 4, e); |
ca29da43 NS |
205 | gcov_close (); |
206 | return; | |
207 | } | |
159b3be1 | 208 | |
cb686b99 NS |
209 | /* Read the stamp, used for creating a generation count. */ |
210 | tag = gcov_read_unsigned (); | |
211 | bbg_file_stamp = crc32_unsigned (bbg_file_stamp, tag); | |
b8698a0f | 212 | |
0823efed | 213 | counts_hash.create (10); |
7d63a2fa | 214 | while ((tag = gcov_read_unsigned ())) |
ca29da43 | 215 | { |
7d63a2fa | 216 | gcov_unsigned_t length; |
9b514d25 | 217 | gcov_position_t offset; |
159b3be1 | 218 | |
ca29da43 NS |
219 | length = gcov_read_unsigned (); |
220 | offset = gcov_position (); | |
221 | if (tag == GCOV_TAG_FUNCTION) | |
222 | { | |
5366b186 | 223 | if (length) |
ca29da43 | 224 | { |
5366b186 NS |
225 | fn_ident = gcov_read_unsigned (); |
226 | lineno_checksum = gcov_read_unsigned (); | |
227 | cfg_checksum = gcov_read_unsigned (); | |
ca29da43 | 228 | } |
5366b186 NS |
229 | else |
230 | fn_ident = lineno_checksum = cfg_checksum = 0; | |
231 | new_summary = 1; | |
ca29da43 NS |
232 | } |
233 | else if (tag == GCOV_TAG_PROGRAM_SUMMARY) | |
234 | { | |
5366b186 NS |
235 | struct gcov_summary sum; |
236 | unsigned ix; | |
159b3be1 | 237 | |
5366b186 NS |
238 | if (new_summary) |
239 | memset (&summary, 0, sizeof (summary)); | |
159b3be1 | 240 | |
5366b186 NS |
241 | gcov_read_summary (&sum); |
242 | for (ix = 0; ix != GCOV_COUNTERS_SUMMABLE; ix++) | |
243 | { | |
244 | summary.ctrs[ix].runs += sum.ctrs[ix].runs; | |
245 | summary.ctrs[ix].sum_all += sum.ctrs[ix].sum_all; | |
246 | if (summary.ctrs[ix].run_max < sum.ctrs[ix].run_max) | |
247 | summary.ctrs[ix].run_max = sum.ctrs[ix].run_max; | |
248 | summary.ctrs[ix].sum_max += sum.ctrs[ix].sum_max; | |
ca29da43 | 249 | } |
9f71de84 TJ |
250 | if (new_summary) |
251 | memcpy (summary.ctrs[GCOV_COUNTER_ARCS].histogram, | |
252 | sum.ctrs[GCOV_COUNTER_ARCS].histogram, | |
253 | sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE); | |
254 | else | |
255 | gcov_histogram_merge (summary.ctrs[GCOV_COUNTER_ARCS].histogram, | |
256 | sum.ctrs[GCOV_COUNTER_ARCS].histogram); | |
5366b186 | 257 | new_summary = 0; |
ca29da43 | 258 | } |
796621e8 | 259 | else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident) |
ca29da43 NS |
260 | { |
261 | counts_entry_t **slot, *entry, elt; | |
330d2e2a | 262 | unsigned n_counts = GCOV_TAG_COUNTER_NUM (length); |
ca29da43 NS |
263 | unsigned ix; |
264 | ||
796621e8 | 265 | elt.ident = fn_ident; |
cdb23767 | 266 | elt.ctr = GCOV_COUNTER_FOR_TAG (tag); |
ca29da43 | 267 | |
0823efed | 268 | slot = counts_hash.find_slot (&elt, INSERT); |
ca29da43 NS |
269 | entry = *slot; |
270 | if (!entry) | |
271 | { | |
5ed6ace5 | 272 | *slot = entry = XCNEW (counts_entry_t); |
10adac51 | 273 | entry->ident = fn_ident; |
cdb23767 | 274 | entry->ctr = elt.ctr; |
10adac51 XDL |
275 | entry->lineno_checksum = lineno_checksum; |
276 | entry->cfg_checksum = cfg_checksum; | |
9f71de84 TJ |
277 | if (elt.ctr < GCOV_COUNTERS_SUMMABLE) |
278 | entry->summary = summary.ctrs[elt.ctr]; | |
279 | entry->summary.num = n_counts; | |
5ed6ace5 | 280 | entry->counts = XCNEWVEC (gcov_type, n_counts); |
ca29da43 | 281 | } |
10adac51 XDL |
282 | else if (entry->lineno_checksum != lineno_checksum |
283 | || entry->cfg_checksum != cfg_checksum) | |
ca29da43 | 284 | { |
10adac51 XDL |
285 | error ("Profile data for function %u is corrupted", fn_ident); |
286 | error ("checksum is (%x,%x) instead of (%x,%x)", | |
287 | entry->lineno_checksum, entry->cfg_checksum, | |
288 | lineno_checksum, cfg_checksum); | |
0823efed | 289 | counts_hash.dispose (); |
24a4a033 JH |
290 | break; |
291 | } | |
292 | else if (entry->summary.num != n_counts) | |
293 | { | |
10adac51 | 294 | error ("Profile data for function %u is corrupted", fn_ident); |
24a4a033 | 295 | error ("number of counters is %d instead of %d", entry->summary.num, n_counts); |
0823efed | 296 | counts_hash.dispose (); |
ca29da43 NS |
297 | break; |
298 | } | |
9b514d25 NS |
299 | else if (elt.ctr >= GCOV_COUNTERS_SUMMABLE) |
300 | { | |
24a4a033 JH |
301 | error ("cannot merge separate %s counters for function %u", |
302 | ctr_names[elt.ctr], fn_ident); | |
9b514d25 NS |
303 | goto skip_merge; |
304 | } | |
5366b186 | 305 | else |
ca29da43 | 306 | { |
5366b186 NS |
307 | entry->summary.runs += summary.ctrs[elt.ctr].runs; |
308 | entry->summary.sum_all += summary.ctrs[elt.ctr].sum_all; | |
309 | if (entry->summary.run_max < summary.ctrs[elt.ctr].run_max) | |
310 | entry->summary.run_max = summary.ctrs[elt.ctr].run_max; | |
311 | entry->summary.sum_max += summary.ctrs[elt.ctr].sum_max; | |
ca29da43 NS |
312 | } |
313 | for (ix = 0; ix != n_counts; ix++) | |
314 | entry->counts[ix] += gcov_read_counter (); | |
9b514d25 | 315 | skip_merge:; |
ca29da43 | 316 | } |
474f141e | 317 | gcov_sync (offset, length); |
24a4a033 | 318 | if ((is_error = gcov_is_error ())) |
00cf2913 | 319 | { |
971801ff | 320 | error (is_error < 0 ? "%qs has overflowed" : "%qs is corrupted", |
00cf2913 | 321 | da_file_name); |
0823efed | 322 | counts_hash.dispose (); |
00cf2913 NS |
323 | break; |
324 | } | |
7d63a2fa | 325 | } |
159b3be1 | 326 | |
ca29da43 NS |
327 | gcov_close (); |
328 | } | |
329 | ||
330 | /* Returns the counters for a particular tag. */ | |
331 | ||
332 | gcov_type * | |
cdb23767 | 333 | get_coverage_counts (unsigned counter, unsigned expected, |
10adac51 | 334 | unsigned cfg_checksum, unsigned lineno_checksum, |
cdb23767 | 335 | const struct gcov_ctr_summary **summary) |
ca29da43 NS |
336 | { |
337 | counts_entry_t *entry, elt; | |
338 | ||
71c0e7fc | 339 | /* No hash table, no counts. */ |
0823efed | 340 | if (!counts_hash.is_created ()) |
ca29da43 NS |
341 | { |
342 | static int warned = 0; | |
343 | ||
344 | if (!warned++) | |
1f5b3869 | 345 | inform (input_location, (flag_guess_branch_prob |
02307675 R |
346 | ? "file %s not found, execution counts estimated" |
347 | : "file %s not found, execution counts assumed to be zero"), | |
bbfff586 | 348 | da_file_name); |
ca29da43 NS |
349 | return NULL; |
350 | } | |
351 | ||
6d70e6be | 352 | elt.ident = current_function_funcdef_no + 1; |
cdb23767 | 353 | elt.ctr = counter; |
0823efed | 354 | entry = counts_hash.find (&elt); |
5366b186 NS |
355 | if (!entry || !entry->summary.num) |
356 | /* The function was not emitted, or is weak and not chosen in the | |
357 | final executable. Silently fail, because there's nothing we | |
358 | can do about it. */ | |
359 | return NULL; | |
360 | ||
10adac51 | 361 | if (entry->cfg_checksum != cfg_checksum |
16c1c158 | 362 | || entry->summary.num != expected) |
24a4a033 | 363 | { |
16c1c158 | 364 | static int warned = 0; |
650cfcab | 365 | bool warning_printed = false; |
4f1e4960 | 366 | tree id = DECL_ASSEMBLER_NAME (current_function_decl); |
16c1c158 | 367 | |
10adac51 XDL |
368 | warning_printed = |
369 | warning_at (input_location, OPT_Wcoverage_mismatch, | |
5366b186 | 370 | "the control flow of function %qE does not match " |
10adac51 | 371 | "its profile data (counter %qs)", id, ctr_names[counter]); |
650cfcab | 372 | if (warning_printed) |
16c1c158 | 373 | { |
5366b186 | 374 | inform (input_location, "use -Wno-error=coverage-mismatch to tolerate " |
10adac51 | 375 | "the mismatch but performance may drop if the function is hot"); |
650cfcab | 376 | |
1da2ed5f | 377 | if (!seen_error () |
650cfcab NV |
378 | && !warned++) |
379 | { | |
380 | inform (input_location, "coverage mismatch ignored"); | |
381 | inform (input_location, flag_guess_branch_prob | |
382 | ? G_("execution counts estimated") | |
383 | : G_("execution counts assumed to be zero")); | |
384 | if (!flag_guess_branch_prob) | |
385 | inform (input_location, | |
386 | "this can result in poorly optimized code"); | |
387 | } | |
16c1c158 RG |
388 | } |
389 | ||
390 | return NULL; | |
ca29da43 | 391 | } |
5366b186 NS |
392 | else if (entry->lineno_checksum != lineno_checksum) |
393 | { | |
b724567e | 394 | warning (0, "source locations for function %qE have changed," |
5366b186 NS |
395 | " the profile data may be out of date", |
396 | DECL_ASSEMBLER_NAME (current_function_decl)); | |
397 | } | |
159b3be1 | 398 | |
cdb23767 NS |
399 | if (summary) |
400 | *summary = &entry->summary; | |
ca29da43 NS |
401 | |
402 | return entry->counts; | |
403 | } | |
cdb23767 | 404 | |
6356f892 | 405 | /* Allocate NUM counters of type COUNTER. Returns nonzero if the |
6d70e6be | 406 | allocation succeeded. */ |
cdb23767 | 407 | |
6d70e6be NS |
408 | int |
409 | coverage_counter_alloc (unsigned counter, unsigned num) | |
cdb23767 | 410 | { |
6d70e6be NS |
411 | if (no_coverage) |
412 | return 0; | |
159b3be1 | 413 | |
6d70e6be NS |
414 | if (!num) |
415 | return 1; | |
159b3be1 | 416 | |
5366b186 | 417 | if (!fn_v_ctrs[counter]) |
cdb23767 | 418 | { |
5366b186 NS |
419 | tree array_type = build_array_type (get_gcov_type (), NULL_TREE); |
420 | ||
421 | fn_v_ctrs[counter] | |
422 | = build_var (current_function_decl, array_type, counter); | |
cdb23767 | 423 | } |
5366b186 | 424 | |
6d70e6be NS |
425 | fn_b_ctrs[counter] = fn_n_ctrs[counter]; |
426 | fn_n_ctrs[counter] += num; | |
5366b186 | 427 | |
6d70e6be NS |
428 | fn_ctr_mask |= 1 << counter; |
429 | return 1; | |
430 | } | |
cdb23767 | 431 | |
6de9cd9a DN |
432 | /* Generate a tree to access COUNTER NO. */ |
433 | ||
434 | tree | |
435 | tree_coverage_counter_ref (unsigned counter, unsigned no) | |
436 | { | |
070e3969 | 437 | tree gcov_type_node = get_gcov_type (); |
6de9cd9a | 438 | |
341c100f | 439 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); |
6de9cd9a | 440 | |
5366b186 NS |
441 | no += fn_b_ctrs[counter]; |
442 | ||
6de9cd9a | 443 | /* "no" here is an array index, scaled to bytes later. */ |
5366b186 | 444 | return build4 (ARRAY_REF, gcov_type_node, fn_v_ctrs[counter], |
f81b1a3d | 445 | build_int_cst (integer_type_node, no), NULL, NULL); |
6de9cd9a | 446 | } |
fc9161c1 RG |
447 | |
448 | /* Generate a tree to access the address of COUNTER NO. */ | |
449 | ||
450 | tree | |
451 | tree_coverage_counter_addr (unsigned counter, unsigned no) | |
452 | { | |
453 | tree gcov_type_node = get_gcov_type (); | |
454 | ||
455 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); | |
5366b186 | 456 | no += fn_b_ctrs[counter]; |
628c189e | 457 | |
fc9161c1 RG |
458 | /* "no" here is an array index, scaled to bytes later. */ |
459 | return build_fold_addr_expr (build4 (ARRAY_REF, gcov_type_node, | |
5366b186 | 460 | fn_v_ctrs[counter], |
f81b1a3d | 461 | build_int_cst (integer_type_node, no), |
fc9161c1 RG |
462 | NULL, NULL)); |
463 | } | |
ca29da43 | 464 | \f |
10adac51 | 465 | |
ca29da43 | 466 | /* Generate a checksum for a string. CHKSUM is the current |
71c0e7fc | 467 | checksum. */ |
ca29da43 NS |
468 | |
469 | static unsigned | |
20c361f3 | 470 | coverage_checksum_string (unsigned chksum, const char *string) |
ca29da43 | 471 | { |
20c361f3 JH |
472 | int i; |
473 | char *dup = NULL; | |
474 | ||
475 | /* Look for everything that looks if it were produced by | |
5880f14f | 476 | get_file_function_name and zero out the second part |
20c361f3 JH |
477 | that may result from flag_random_seed. This is not critical |
478 | as the checksums are used only for sanity checking. */ | |
479 | for (i = 0; string[i]; i++) | |
ca29da43 | 480 | { |
2b557972 JH |
481 | int offset = 0; |
482 | if (!strncmp (string + i, "_GLOBAL__N_", 11)) | |
483 | offset = 11; | |
20c361f3 | 484 | if (!strncmp (string + i, "_GLOBAL__", 9)) |
2b557972 JH |
485 | offset = 9; |
486 | ||
487 | /* C++ namespaces do have scheme: | |
488 | _GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname | |
489 | since filename might contain extra underscores there seems | |
490 | to be no better chance then walk all possible offsets looking | |
fa10beec | 491 | for magicnumber. */ |
2b557972 | 492 | if (offset) |
1f651229 JH |
493 | { |
494 | for (i = i + offset; string[i]; i++) | |
495 | if (string[i]=='_') | |
496 | { | |
497 | int y; | |
498 | ||
499 | for (y = 1; y < 9; y++) | |
500 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
501 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
502 | break; | |
503 | if (y != 9 || string[i + 9] != '_') | |
504 | continue; | |
505 | for (y = 10; y < 18; y++) | |
506 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
507 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
508 | break; | |
509 | if (y != 18) | |
510 | continue; | |
511 | if (!dup) | |
512 | string = dup = xstrdup (string); | |
513 | for (y = 10; y < 18; y++) | |
514 | dup[i + y] = '0'; | |
515 | } | |
516 | break; | |
517 | } | |
ca29da43 | 518 | } |
20c361f3 JH |
519 | |
520 | chksum = crc32_string (chksum, string); | |
04695783 | 521 | free (dup); |
159b3be1 | 522 | |
ca29da43 NS |
523 | return chksum; |
524 | } | |
525 | ||
526 | /* Compute checksum for the current function. We generate a CRC32. */ | |
527 | ||
10adac51 XDL |
528 | unsigned |
529 | coverage_compute_lineno_checksum (void) | |
ca29da43 | 530 | { |
a281759f PB |
531 | expanded_location xloc |
532 | = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); | |
533 | unsigned chksum = xloc.line; | |
ca29da43 | 534 | |
a281759f | 535 | chksum = coverage_checksum_string (chksum, xloc.file); |
20c361f3 | 536 | chksum = coverage_checksum_string |
ca29da43 NS |
537 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); |
538 | ||
539 | return chksum; | |
540 | } | |
10adac51 XDL |
541 | |
542 | /* Compute cfg checksum for the current function. | |
543 | The checksum is calculated carefully so that | |
544 | source code changes that doesn't affect the control flow graph | |
545 | won't change the checksum. | |
546 | This is to make the profile data useable across source code change. | |
547 | The downside of this is that the compiler may use potentially | |
548 | wrong profile data - that the source code change has non-trivial impact | |
549 | on the validity of profile data (e.g. the reversed condition) | |
550 | but the compiler won't detect the change and use the wrong profile data. */ | |
551 | ||
552 | unsigned | |
553 | coverage_compute_cfg_checksum (void) | |
554 | { | |
555 | basic_block bb; | |
556 | unsigned chksum = n_basic_blocks; | |
557 | ||
558 | FOR_EACH_BB (bb) | |
559 | { | |
560 | edge e; | |
561 | edge_iterator ei; | |
562 | chksum = crc32_byte (chksum, bb->index); | |
563 | FOR_EACH_EDGE (e, ei, bb->succs) | |
564 | { | |
565 | chksum = crc32_byte (chksum, e->dest->index); | |
566 | } | |
567 | } | |
568 | ||
569 | return chksum; | |
570 | } | |
ca29da43 | 571 | \f |
efbb59b2 | 572 | /* Begin output to the notes file for the current function. |
b724567e | 573 | Writes the function header. Returns nonzero if data should be output. */ |
ca29da43 NS |
574 | |
575 | int | |
b724567e | 576 | coverage_begin_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 | 577 | { |
b724567e NS |
578 | expanded_location xloc; |
579 | unsigned long offset; | |
580 | ||
2f908293 SP |
581 | /* We don't need to output .gcno file unless we're under -ftest-coverage |
582 | (e.g. -fprofile-arcs/generate/use don't need .gcno to work). */ | |
b724567e | 583 | if (no_coverage || !bbg_file_name) |
6d70e6be | 584 | return 0; |
159b3be1 | 585 | |
b724567e | 586 | xloc = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); |
10adac51 | 587 | |
b724567e NS |
588 | /* Announce function */ |
589 | offset = gcov_write_tag (GCOV_TAG_FUNCTION); | |
590 | gcov_write_unsigned (current_function_funcdef_no + 1); | |
591 | gcov_write_unsigned (lineno_checksum); | |
592 | gcov_write_unsigned (cfg_checksum); | |
593 | gcov_write_string (IDENTIFIER_POINTER | |
594 | (DECL_ASSEMBLER_NAME (current_function_decl))); | |
595 | gcov_write_string (xloc.file); | |
596 | gcov_write_unsigned (xloc.line); | |
597 | gcov_write_length (offset); | |
ca29da43 | 598 | |
ca29da43 NS |
599 | return !gcov_is_error (); |
600 | } | |
601 | ||
602 | /* Finish coverage data for the current function. Verify no output | |
603 | error has occurred. Save function coverage counts. */ | |
604 | ||
605 | void | |
10adac51 | 606 | coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 NS |
607 | { |
608 | unsigned i; | |
159b3be1 | 609 | |
b724567e | 610 | if (bbg_file_name && gcov_is_error ()) |
159b3be1 | 611 | { |
d4ee4d25 | 612 | warning (0, "error writing %qs", bbg_file_name); |
b724567e NS |
613 | unlink (bbg_file_name); |
614 | bbg_file_name = NULL; | |
ca29da43 | 615 | } |
cdb23767 | 616 | |
2ac69a0c | 617 | if (fn_ctr_mask) |
cdb23767 | 618 | { |
2ac69a0c NS |
619 | struct coverage_data *item = 0; |
620 | ||
621 | /* If the function is extern (i.e. extern inline), then we won't | |
622 | be outputting it, so don't chain it onto the function | |
623 | list. */ | |
624 | if (!DECL_EXTERNAL (current_function_decl)) | |
625 | { | |
626 | item = ggc_alloc_coverage_data (); | |
627 | ||
628 | item->ident = current_function_funcdef_no + 1; | |
629 | item->lineno_checksum = lineno_checksum; | |
630 | item->cfg_checksum = cfg_checksum; | |
631 | ||
632 | item->fn_decl = current_function_decl; | |
633 | item->next = 0; | |
634 | *functions_tail = item; | |
635 | functions_tail = &item->next; | |
636 | } | |
10adac51 | 637 | |
cdb23767 NS |
638 | for (i = 0; i != GCOV_COUNTERS; i++) |
639 | { | |
5366b186 | 640 | tree var = fn_v_ctrs[i]; |
2ac69a0c NS |
641 | |
642 | if (item) | |
643 | item->ctr_vars[i] = var; | |
5366b186 NS |
644 | if (var) |
645 | { | |
646 | tree array_type = build_index_type (size_int (fn_n_ctrs[i] - 1)); | |
647 | array_type = build_array_type (get_gcov_type (), array_type); | |
648 | TREE_TYPE (var) = array_type; | |
649 | DECL_SIZE (var) = TYPE_SIZE (array_type); | |
650 | DECL_SIZE_UNIT (var) = TYPE_SIZE_UNIT (array_type); | |
651 | varpool_finalize_decl (var); | |
652 | } | |
2ac69a0c | 653 | |
5366b186 NS |
654 | fn_b_ctrs[i] = fn_n_ctrs[i] = 0; |
655 | fn_v_ctrs[i] = NULL_TREE; | |
cdb23767 NS |
656 | } |
657 | prg_ctr_mask |= fn_ctr_mask; | |
658 | fn_ctr_mask = 0; | |
659 | } | |
ca29da43 NS |
660 | } |
661 | ||
5366b186 | 662 | /* Build a coverage variable of TYPE for function FN_DECL. If COUNTER |
0e485da0 | 663 | >= 0 it is a counter array, otherwise it is the function structure. */ |
ca29da43 | 664 | |
ca29da43 | 665 | static tree |
5366b186 NS |
666 | build_var (tree fn_decl, tree type, int counter) |
667 | { | |
668 | tree var = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, type); | |
9e66e106 JJ |
669 | const char *fn_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn_decl)); |
670 | char *buf; | |
671 | size_t fn_name_len, len; | |
672 | ||
673 | fn_name = targetm.strip_name_encoding (fn_name); | |
674 | fn_name_len = strlen (fn_name); | |
675 | buf = XALLOCAVEC (char, fn_name_len + 8 + sizeof (int) * 3); | |
5366b186 | 676 | |
5366b186 | 677 | if (counter < 0) |
9e66e106 | 678 | strcpy (buf, "__gcov__"); |
5366b186 | 679 | else |
9e66e106 JJ |
680 | sprintf (buf, "__gcov%u_", counter); |
681 | len = strlen (buf); | |
682 | #ifndef NO_DOT_IN_LABEL | |
683 | buf[len - 1] = '.'; | |
684 | #elif !defined NO_DOLLAR_IN_LABEL | |
685 | buf[len - 1] = '$'; | |
686 | #endif | |
687 | memcpy (buf + len, fn_name, fn_name_len + 1); | |
5366b186 | 688 | DECL_NAME (var) = get_identifier (buf); |
89b0c303 NS |
689 | TREE_STATIC (var) = 1; |
690 | TREE_ADDRESSABLE (var) = 1; | |
691 | DECL_ALIGN (var) = TYPE_ALIGN (type); | |
5366b186 NS |
692 | |
693 | return var; | |
694 | } | |
695 | ||
696 | /* Creates the gcov_fn_info RECORD_TYPE. */ | |
697 | ||
698 | static void | |
699 | build_fn_info_type (tree type, unsigned counters, tree gcov_info_type) | |
ca29da43 | 700 | { |
5366b186 | 701 | tree ctr_info = lang_hooks.types.make_type (RECORD_TYPE); |
ca29da43 | 702 | tree field, fields; |
cdb23767 | 703 | tree array_type; |
159b3be1 | 704 | |
5366b186 NS |
705 | gcc_assert (counters); |
706 | ||
707 | /* ctr_info::num */ | |
708 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
709 | get_gcov_unsigned_t ()); | |
710 | fields = field; | |
711 | ||
712 | /* ctr_info::values */ | |
713 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
714 | build_pointer_type (get_gcov_type ())); | |
715 | DECL_CHAIN (field) = fields; | |
716 | fields = field; | |
717 | ||
718 | finish_builtin_struct (ctr_info, "__gcov_ctr_info", fields, NULL_TREE); | |
719 | ||
720 | /* key */ | |
721 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
722 | build_pointer_type (build_qualified_type | |
723 | (gcov_info_type, TYPE_QUAL_CONST))); | |
724 | fields = field; | |
725 | ||
796621e8 | 726 | /* ident */ |
5366b186 NS |
727 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
728 | get_gcov_unsigned_t ()); | |
729 | DECL_CHAIN (field) = fields; | |
730 | fields = field; | |
731 | ||
10adac51 | 732 | /* lineno_checksum */ |
5366b186 NS |
733 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
734 | get_gcov_unsigned_t ()); | |
910ad8de | 735 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
736 | fields = field; |
737 | ||
10adac51 | 738 | /* cfg checksum */ |
5366b186 NS |
739 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
740 | get_gcov_unsigned_t ()); | |
10adac51 XDL |
741 | DECL_CHAIN (field) = fields; |
742 | fields = field; | |
743 | ||
f81b1a3d | 744 | array_type = build_index_type (size_int (counters - 1)); |
5366b186 | 745 | array_type = build_array_type (ctr_info, array_type); |
159b3be1 | 746 | |
ca29da43 | 747 | /* counters */ |
5366b186 | 748 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, array_type); |
910ad8de | 749 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
750 | fields = field; |
751 | ||
cdb23767 | 752 | finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE); |
ca29da43 NS |
753 | } |
754 | ||
b724567e NS |
755 | /* Returns a CONSTRUCTOR for a gcov_fn_info. DATA is |
756 | the coverage data for the function and TYPE is the gcov_fn_info | |
757 | RECORD_TYPE. KEY is the object file key. */ | |
cdb23767 | 758 | |
ca29da43 | 759 | static tree |
b724567e | 760 | build_fn_info (const struct coverage_data *data, tree type, tree key) |
ca29da43 | 761 | { |
cdb23767 | 762 | tree fields = TYPE_FIELDS (type); |
5366b186 | 763 | tree ctr_type; |
cdb23767 | 764 | unsigned ix; |
9771b263 DN |
765 | vec<constructor_elt, va_gc> *v1 = NULL; |
766 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 767 | |
5366b186 NS |
768 | /* key */ |
769 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
770 | build1 (ADDR_EXPR, TREE_TYPE (fields), key)); | |
771 | fields = DECL_CHAIN (fields); | |
772 | ||
796621e8 | 773 | /* ident */ |
f9b36bb3 KH |
774 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
775 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 776 | data->ident)); |
910ad8de | 777 | fields = DECL_CHAIN (fields); |
159b3be1 | 778 | |
10adac51 XDL |
779 | /* lineno_checksum */ |
780 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
781 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 782 | data->lineno_checksum)); |
10adac51 XDL |
783 | fields = DECL_CHAIN (fields); |
784 | ||
785 | /* cfg_checksum */ | |
f9b36bb3 KH |
786 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
787 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 788 | data->cfg_checksum)); |
910ad8de | 789 | fields = DECL_CHAIN (fields); |
159b3be1 | 790 | |
ca29da43 | 791 | /* counters */ |
5366b186 | 792 | ctr_type = TREE_TYPE (TREE_TYPE (fields)); |
cdb23767 NS |
793 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
794 | if (prg_ctr_mask & (1 << ix)) | |
5366b186 | 795 | { |
9771b263 | 796 | vec<constructor_elt, va_gc> *ctr = NULL; |
b724567e | 797 | tree var = data->ctr_vars[ix]; |
5366b186 NS |
798 | unsigned count = 0; |
799 | ||
800 | if (var) | |
801 | count | |
802 | = tree_low_cst (TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (var))), 0) | |
803 | + 1; | |
804 | ||
805 | CONSTRUCTOR_APPEND_ELT (ctr, TYPE_FIELDS (ctr_type), | |
806 | build_int_cstu (get_gcov_unsigned_t (), | |
807 | count)); | |
808 | ||
809 | if (var) | |
810 | CONSTRUCTOR_APPEND_ELT (ctr, DECL_CHAIN (TYPE_FIELDS (ctr_type)), | |
811 | build_fold_addr_expr (var)); | |
812 | ||
813 | CONSTRUCTOR_APPEND_ELT (v2, NULL, build_constructor (ctr_type, ctr)); | |
814 | } | |
815 | ||
f9b36bb3 KH |
816 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
817 | build_constructor (TREE_TYPE (fields), v2)); | |
159b3be1 | 818 | |
f9b36bb3 | 819 | return build_constructor (type, v1); |
ca29da43 NS |
820 | } |
821 | ||
b724567e NS |
822 | /* Create gcov_info struct. TYPE is the incomplete RECORD_TYPE to be |
823 | completed, and FN_INFO_PTR_TYPE is a pointer to the function info type. */ | |
cdb23767 | 824 | |
5366b186 | 825 | static void |
b724567e | 826 | build_info_type (tree type, tree fn_info_ptr_type) |
ca29da43 | 827 | { |
cdb23767 | 828 | tree field, fields = NULL_TREE; |
b724567e | 829 | tree merge_fn_type; |
9b514d25 | 830 | |
5366b186 NS |
831 | /* Version ident */ |
832 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
833 | get_gcov_unsigned_t ()); | |
910ad8de | 834 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
835 | fields = field; |
836 | ||
5366b186 NS |
837 | /* next pointer */ |
838 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
839 | build_pointer_type (build_qualified_type | |
840 | (type, TYPE_QUAL_CONST))); | |
910ad8de | 841 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
842 | fields = field; |
843 | ||
5366b186 NS |
844 | /* stamp */ |
845 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
846 | get_gcov_unsigned_t ()); | |
910ad8de | 847 | DECL_CHAIN (field) = fields; |
09780dfb ZD |
848 | fields = field; |
849 | ||
5366b186 NS |
850 | /* Filename */ |
851 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
852 | build_pointer_type (build_qualified_type | |
853 | (char_type_node, TYPE_QUAL_CONST))); | |
854 | DECL_CHAIN (field) = fields; | |
855 | fields = field; | |
ca29da43 | 856 | |
5366b186 NS |
857 | /* merge fn array */ |
858 | merge_fn_type | |
859 | = build_function_type_list (void_type_node, | |
860 | build_pointer_type (get_gcov_type ()), | |
861 | get_gcov_unsigned_t (), NULL_TREE); | |
862 | merge_fn_type | |
863 | = build_array_type (build_pointer_type (merge_fn_type), | |
864 | build_index_type (size_int (GCOV_COUNTERS - 1))); | |
865 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
866 | merge_fn_type); | |
867 | DECL_CHAIN (field) = fields; | |
868 | fields = field; | |
869 | ||
870 | /* n_functions */ | |
871 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
872 | get_gcov_unsigned_t ()); | |
873 | DECL_CHAIN (field) = fields; | |
874 | fields = field; | |
875 | ||
b724567e NS |
876 | /* function_info pointer pointer */ |
877 | fn_info_ptr_type = build_pointer_type | |
878 | (build_qualified_type (fn_info_ptr_type, TYPE_QUAL_CONST)); | |
5366b186 | 879 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
b724567e | 880 | fn_info_ptr_type); |
5366b186 NS |
881 | DECL_CHAIN (field) = fields; |
882 | fields = field; | |
09780dfb | 883 | |
5366b186 | 884 | finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE); |
ca29da43 NS |
885 | } |
886 | ||
b724567e NS |
887 | /* Returns a CONSTRUCTOR for the gcov_info object. INFO_TYPE is the |
888 | gcov_info structure type, FN_ARY is the array of pointers to | |
889 | function info objects. */ | |
cdb23767 | 890 | |
ca29da43 | 891 | static tree |
b724567e | 892 | build_info (tree info_type, tree fn_ary) |
ca29da43 | 893 | { |
5366b186 | 894 | tree info_fields = TYPE_FIELDS (info_type); |
b724567e | 895 | tree merge_fn_type, n_funcs; |
5366b186 | 896 | unsigned ix; |
cdb23767 | 897 | tree filename_string; |
2f908293 | 898 | int da_file_name_len; |
9771b263 DN |
899 | vec<constructor_elt, va_gc> *v1 = NULL; |
900 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 901 | |
cdb23767 | 902 | /* Version ident */ |
5366b186 NS |
903 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
904 | build_int_cstu (TREE_TYPE (info_fields), | |
905 | GCOV_VERSION)); | |
906 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 907 | |
ca29da43 | 908 | /* next -- NULL */ |
5366b186 NS |
909 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node); |
910 | info_fields = DECL_CHAIN (info_fields); | |
911 | ||
dd486eb2 | 912 | /* stamp */ |
5366b186 NS |
913 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
914 | build_int_cstu (TREE_TYPE (info_fields), | |
cb686b99 | 915 | bbg_file_stamp)); |
5366b186 | 916 | info_fields = DECL_CHAIN (info_fields); |
dd486eb2 | 917 | |
ca29da43 | 918 | /* Filename */ |
2f908293 SP |
919 | da_file_name_len = strlen (da_file_name); |
920 | filename_string = build_string (da_file_name_len + 1, da_file_name); | |
4a90aeeb | 921 | TREE_TYPE (filename_string) = build_array_type |
f81b1a3d | 922 | (char_type_node, build_index_type (size_int (da_file_name_len))); |
5366b186 NS |
923 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
924 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), | |
925 | filename_string)); | |
926 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 927 | |
5366b186 NS |
928 | /* merge fn array -- NULL slots indicate unmeasured counters */ |
929 | merge_fn_type = TREE_TYPE (TREE_TYPE (info_fields)); | |
930 | for (ix = 0; ix != GCOV_COUNTERS; ix++) | |
ca29da43 | 931 | { |
5366b186 | 932 | tree ptr = null_pointer_node; |
159b3be1 | 933 | |
5366b186 NS |
934 | if ((1u << ix) & prg_ctr_mask) |
935 | { | |
936 | tree merge_fn = build_decl (BUILTINS_LOCATION, | |
937 | FUNCTION_DECL, | |
938 | get_identifier (ctr_merge_functions[ix]), | |
939 | TREE_TYPE (merge_fn_type)); | |
940 | DECL_EXTERNAL (merge_fn) = 1; | |
941 | TREE_PUBLIC (merge_fn) = 1; | |
942 | DECL_ARTIFICIAL (merge_fn) = 1; | |
943 | TREE_NOTHROW (merge_fn) = 1; | |
944 | /* Initialize assembler name so we can stream out. */ | |
945 | DECL_ASSEMBLER_NAME (merge_fn); | |
946 | ptr = build1 (ADDR_EXPR, merge_fn_type, merge_fn); | |
947 | } | |
948 | CONSTRUCTOR_APPEND_ELT (v2, NULL, ptr); | |
ca29da43 | 949 | } |
5366b186 NS |
950 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
951 | build_constructor (TREE_TYPE (info_fields), v2)); | |
952 | info_fields = DECL_CHAIN (info_fields); | |
953 | ||
954 | /* n_functions */ | |
b724567e NS |
955 | n_funcs = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (fn_ary))); |
956 | n_funcs = fold_build2 (PLUS_EXPR, TREE_TYPE (info_fields), | |
957 | n_funcs, size_one_node); | |
958 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, n_funcs); | |
5366b186 | 959 | info_fields = DECL_CHAIN (info_fields); |
5366b186 | 960 | |
b724567e | 961 | /* functions */ |
5366b186 | 962 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
b724567e NS |
963 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), fn_ary)); |
964 | info_fields = DECL_CHAIN (info_fields); | |
965 | ||
966 | gcc_assert (!info_fields); | |
5366b186 | 967 | return build_constructor (info_type, v1); |
ca29da43 NS |
968 | } |
969 | ||
b724567e NS |
970 | /* Create the gcov_info types and object. Generate the constructor |
971 | function to call __gcov_init. Does not generate the initializer | |
972 | for the object. Returns TRUE if coverage data is being emitted. */ | |
ca29da43 | 973 | |
b724567e NS |
974 | static bool |
975 | coverage_obj_init (void) | |
ca29da43 | 976 | { |
b724567e NS |
977 | tree gcov_info_type, ctor, stmt, init_fn; |
978 | unsigned n_counters = 0; | |
5366b186 | 979 | unsigned ix; |
b724567e NS |
980 | struct coverage_data *fn; |
981 | struct coverage_data **fn_prev; | |
c9b9aa64 | 982 | char name_buf[32]; |
ca29da43 | 983 | |
6d70e6be | 984 | no_coverage = 1; /* Disable any further coverage. */ |
159b3be1 | 985 | |
cdb23767 | 986 | if (!prg_ctr_mask) |
b724567e | 987 | return false; |
159b3be1 | 988 | |
5366b186 NS |
989 | if (cgraph_dump_file) |
990 | fprintf (cgraph_dump_file, "Using data file %s\n", da_file_name); | |
ca29da43 | 991 | |
b724567e | 992 | /* Prune functions. */ |
5366b186 NS |
993 | for (fn_prev = &functions_head; (fn = *fn_prev);) |
994 | if (DECL_STRUCT_FUNCTION (fn->fn_decl)) | |
b724567e | 995 | fn_prev = &fn->next; |
5366b186 NS |
996 | else |
997 | /* The function is not being emitted, remove from list. */ | |
998 | *fn_prev = fn->next; | |
b724567e | 999 | |
0f9fb22f JJ |
1000 | if (functions_head == NULL) |
1001 | return false; | |
1002 | ||
b724567e NS |
1003 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
1004 | if ((1u << ix) & prg_ctr_mask) | |
1005 | n_counters++; | |
5366b186 NS |
1006 | |
1007 | /* Build the info and fn_info types. These are mutually recursive. */ | |
1008 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
b724567e NS |
1009 | gcov_fn_info_type = lang_hooks.types.make_type (RECORD_TYPE); |
1010 | gcov_fn_info_ptr_type = build_pointer_type | |
1011 | (build_qualified_type (gcov_fn_info_type, TYPE_QUAL_CONST)); | |
1012 | build_fn_info_type (gcov_fn_info_type, n_counters, gcov_info_type); | |
1013 | build_info_type (gcov_info_type, gcov_fn_info_ptr_type); | |
5366b186 NS |
1014 | |
1015 | /* Build the gcov info var, this is referred to in its own | |
1016 | initializer. */ | |
b724567e NS |
1017 | gcov_info_var = build_decl (BUILTINS_LOCATION, |
1018 | VAR_DECL, NULL_TREE, gcov_info_type); | |
1019 | TREE_STATIC (gcov_info_var) = 1; | |
c9b9aa64 | 1020 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0); |
b724567e | 1021 | DECL_NAME (gcov_info_var) = get_identifier (name_buf); |
ca29da43 | 1022 | |
c9b9aa64 | 1023 | /* Build a decl for __gcov_init. */ |
b724567e NS |
1024 | init_fn = build_pointer_type (gcov_info_type); |
1025 | init_fn = build_function_type_list (void_type_node, init_fn, NULL); | |
1026 | init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
1027 | get_identifier ("__gcov_init"), init_fn); | |
1028 | TREE_PUBLIC (init_fn) = 1; | |
1029 | DECL_EXTERNAL (init_fn) = 1; | |
1030 | DECL_ASSEMBLER_NAME (init_fn); | |
c9b9aa64 RH |
1031 | |
1032 | /* Generate a call to __gcov_init(&gcov_info). */ | |
b724567e NS |
1033 | ctor = NULL; |
1034 | stmt = build_fold_addr_expr (gcov_info_var); | |
1035 | stmt = build_call_expr (init_fn, 1, stmt); | |
1036 | append_to_statement_list (stmt, &ctor); | |
c9b9aa64 RH |
1037 | |
1038 | /* Generate a constructor to run it. */ | |
b724567e NS |
1039 | cgraph_build_static_cdtor ('I', ctor, DEFAULT_INIT_PRIORITY); |
1040 | ||
1041 | return true; | |
ca29da43 | 1042 | } |
b724567e NS |
1043 | |
1044 | /* Generate the coverage function info for FN and DATA. Append a | |
1045 | pointer to that object to CTOR and return the appended CTOR. */ | |
1046 | ||
9771b263 DN |
1047 | static vec<constructor_elt, va_gc> * |
1048 | coverage_obj_fn (vec<constructor_elt, va_gc> *ctor, tree fn, | |
b724567e NS |
1049 | struct coverage_data const *data) |
1050 | { | |
1051 | tree init = build_fn_info (data, gcov_fn_info_type, gcov_info_var); | |
1052 | tree var = build_var (fn, gcov_fn_info_type, -1); | |
1053 | ||
1054 | DECL_INITIAL (var) = init; | |
1055 | varpool_finalize_decl (var); | |
1056 | ||
1057 | CONSTRUCTOR_APPEND_ELT (ctor, NULL, | |
1058 | build1 (ADDR_EXPR, gcov_fn_info_ptr_type, var)); | |
1059 | return ctor; | |
1060 | } | |
1061 | ||
1062 | /* Finalize the coverage data. Generates the array of pointers to | |
1063 | function objects from CTOR. Generate the gcov_info initializer. */ | |
1064 | ||
1065 | static void | |
9771b263 | 1066 | coverage_obj_finish (vec<constructor_elt, va_gc> *ctor) |
b724567e | 1067 | { |
9771b263 | 1068 | unsigned n_functions = vec_safe_length (ctor); |
b724567e NS |
1069 | tree fn_info_ary_type = build_array_type |
1070 | (build_qualified_type (gcov_fn_info_ptr_type, TYPE_QUAL_CONST), | |
1071 | build_index_type (size_int (n_functions - 1))); | |
1072 | tree fn_info_ary = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, | |
1073 | fn_info_ary_type); | |
1074 | char name_buf[32]; | |
1075 | ||
1076 | TREE_STATIC (fn_info_ary) = 1; | |
1077 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 1); | |
1078 | DECL_NAME (fn_info_ary) = get_identifier (name_buf); | |
1079 | DECL_INITIAL (fn_info_ary) = build_constructor (fn_info_ary_type, ctor); | |
1080 | varpool_finalize_decl (fn_info_ary); | |
1081 | ||
1082 | DECL_INITIAL (gcov_info_var) | |
1083 | = build_info (TREE_TYPE (gcov_info_var), fn_info_ary); | |
1084 | varpool_finalize_decl (gcov_info_var); | |
1085 | } | |
1086 | ||
ca29da43 | 1087 | /* Perform file-level initialization. Read in data file, generate name |
efbb59b2 | 1088 | of notes file. */ |
ca29da43 NS |
1089 | |
1090 | void | |
159b3be1 | 1091 | coverage_init (const char *filename) |
ca29da43 NS |
1092 | { |
1093 | int len = strlen (filename); | |
b724567e | 1094 | int prefix_len = 0; |
b8698a0f | 1095 | |
b724567e | 1096 | if (!profile_data_prefix && !IS_ABSOLUTE_PATH (filename)) |
2f908293 SP |
1097 | profile_data_prefix = getpwd (); |
1098 | ||
b724567e NS |
1099 | if (profile_data_prefix) |
1100 | prefix_len = strlen (profile_data_prefix); | |
ca29da43 | 1101 | |
796621e8 | 1102 | /* Name of da file. */ |
b8698a0f | 1103 | da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX) |
b724567e | 1104 | + prefix_len + 2); |
2f908293 SP |
1105 | |
1106 | if (profile_data_prefix) | |
1107 | { | |
b724567e NS |
1108 | memcpy (da_file_name, profile_data_prefix, prefix_len); |
1109 | da_file_name[prefix_len++] = '/'; | |
2f908293 | 1110 | } |
b724567e NS |
1111 | memcpy (da_file_name + prefix_len, filename, len); |
1112 | strcpy (da_file_name + prefix_len + len, GCOV_DATA_SUFFIX); | |
159b3be1 | 1113 | |
cb686b99 NS |
1114 | bbg_file_stamp = local_tick; |
1115 | ||
1116 | if (flag_branch_probabilities) | |
1117 | read_counts_file (); | |
1118 | ||
796621e8 | 1119 | /* Name of bbg file. */ |
b724567e NS |
1120 | if (flag_test_coverage && !flag_compare_debug) |
1121 | { | |
1122 | bbg_file_name = XNEWVEC (char, len + strlen (GCOV_NOTE_SUFFIX) + 1); | |
1123 | memcpy (bbg_file_name, filename, len); | |
1124 | strcpy (bbg_file_name + len, GCOV_NOTE_SUFFIX); | |
1125 | ||
1126 | if (!gcov_open (bbg_file_name, -1)) | |
1127 | { | |
1128 | error ("cannot open %s", bbg_file_name); | |
1129 | bbg_file_name = NULL; | |
1130 | } | |
1131 | else | |
1132 | { | |
1133 | gcov_write_unsigned (GCOV_NOTE_MAGIC); | |
1134 | gcov_write_unsigned (GCOV_VERSION); | |
cb686b99 | 1135 | gcov_write_unsigned (bbg_file_stamp); |
b724567e NS |
1136 | } |
1137 | } | |
ca29da43 NS |
1138 | } |
1139 | ||
efbb59b2 | 1140 | /* Performs file-level cleanup. Close notes file, generate coverage |
ca29da43 NS |
1141 | variables and constructor. */ |
1142 | ||
1143 | void | |
159b3be1 | 1144 | coverage_finish (void) |
ca29da43 | 1145 | { |
b724567e NS |
1146 | if (bbg_file_name && gcov_close ()) |
1147 | unlink (bbg_file_name); | |
cb686b99 NS |
1148 | |
1149 | if (!flag_branch_probabilities && flag_test_coverage | |
1150 | && (!local_tick || local_tick == (unsigned)-1)) | |
1151 | /* Only remove the da file, if we're emitting coverage code and | |
1152 | cannot uniquely stamp it. If we can stamp it, libgcov will DTRT. */ | |
b724567e NS |
1153 | unlink (da_file_name); |
1154 | ||
1155 | if (coverage_obj_init ()) | |
ca29da43 | 1156 | { |
9771b263 | 1157 | vec<constructor_elt, va_gc> *fn_ctor = NULL; |
b724567e NS |
1158 | struct coverage_data *fn; |
1159 | ||
1160 | for (fn = functions_head; fn; fn = fn->next) | |
1161 | fn_ctor = coverage_obj_fn (fn_ctor, fn->fn_decl, fn); | |
1162 | coverage_obj_finish (fn_ctor); | |
ca29da43 NS |
1163 | } |
1164 | } | |
1165 | ||
ca29da43 | 1166 | #include "gt-coverage.h" |