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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 | 45 | #include "tree-iterator.h" |
103ff0d6 TJ |
46 | #include "context.h" |
47 | #include "pass_manager.h" | |
48 | #include "tree-pass.h" | |
c9b9aa64 | 49 | #include "cgraph.h" |
7ee2468b | 50 | #include "dumpfile.h" |
1da2ed5f | 51 | #include "diagnostic-core.h" |
650cfcab | 52 | #include "intl.h" |
ba78087b | 53 | #include "filenames.h" |
9e66e106 | 54 | #include "target.h" |
ca29da43 | 55 | |
10adac51 | 56 | #include "gcov-io.h" |
ca29da43 NS |
57 | #include "gcov-io.c" |
58 | ||
b724567e | 59 | struct GTY((chain_next ("%h.next"))) coverage_data |
ca29da43 | 60 | { |
b724567e | 61 | struct coverage_data *next; /* next function */ |
159b3be1 | 62 | unsigned ident; /* function ident */ |
10adac51 XDL |
63 | unsigned lineno_checksum; /* function lineno checksum */ |
64 | unsigned cfg_checksum; /* function cfg checksum */ | |
5366b186 NS |
65 | tree fn_decl; /* the function decl */ |
66 | tree ctr_vars[GCOV_COUNTERS]; /* counter variables. */ | |
ca29da43 NS |
67 | }; |
68 | ||
69 | /* Counts information for a function. */ | |
70 | typedef struct counts_entry | |
71 | { | |
72 | /* We hash by */ | |
796621e8 | 73 | unsigned ident; |
cdb23767 | 74 | unsigned ctr; |
159b3be1 | 75 | |
ca29da43 | 76 | /* Store */ |
10adac51 XDL |
77 | unsigned lineno_checksum; |
78 | unsigned cfg_checksum; | |
ca29da43 | 79 | gcov_type *counts; |
cdb23767 | 80 | struct gcov_ctr_summary summary; |
5deac340 RG |
81 | |
82 | /* hash_table support. */ | |
5831a5f0 LC |
83 | typedef counts_entry value_type; |
84 | typedef counts_entry compare_type; | |
85 | static inline hashval_t hash (const value_type *); | |
86 | static int equal (const value_type *, const compare_type *); | |
87 | static void remove (value_type *); | |
ca29da43 NS |
88 | } counts_entry_t; |
89 | ||
b724567e NS |
90 | static GTY(()) struct coverage_data *functions_head = 0; |
91 | static struct coverage_data **functions_tail = &functions_head; | |
6d70e6be | 92 | static unsigned no_coverage = 0; |
ca29da43 | 93 | |
cdb23767 NS |
94 | /* Cumulative counter information for whole program. */ |
95 | static unsigned prg_ctr_mask; /* Mask of counter types generated. */ | |
ca29da43 | 96 | |
cdb23767 | 97 | /* Counter information for current function. */ |
71c0e7fc | 98 | static unsigned fn_ctr_mask; /* Mask of counters used. */ |
5366b186 | 99 | static GTY(()) tree fn_v_ctrs[GCOV_COUNTERS]; /* counter variables. */ |
6d70e6be NS |
100 | static unsigned fn_n_ctrs[GCOV_COUNTERS]; /* Counters allocated. */ |
101 | static unsigned fn_b_ctrs[GCOV_COUNTERS]; /* Allocation base. */ | |
ca29da43 | 102 | |
b724567e NS |
103 | /* Coverage info VAR_DECL and function info type nodes. */ |
104 | static GTY(()) tree gcov_info_var; | |
105 | static GTY(()) tree gcov_fn_info_type; | |
106 | static GTY(()) tree gcov_fn_info_ptr_type; | |
107 | ||
efbb59b2 SB |
108 | /* Name of the notes (gcno) output file. The "bbg" prefix is for |
109 | historical reasons, when the notes file contained only the | |
110 | basic block graph notes. | |
111 | If this is NULL we're not writing to the notes file. */ | |
ca29da43 | 112 | static char *bbg_file_name; |
ca29da43 | 113 | |
efbb59b2 | 114 | /* File stamp for notes file. */ |
cb686b99 NS |
115 | static unsigned bbg_file_stamp; |
116 | ||
efbb59b2 | 117 | /* Name of the count data (gcda) file. */ |
ca29da43 NS |
118 | static char *da_file_name; |
119 | ||
09780dfb | 120 | /* The names of merge functions for counters. */ |
9b514d25 NS |
121 | static const char *const ctr_merge_functions[GCOV_COUNTERS] = GCOV_MERGE_FUNCTIONS; |
122 | static const char *const ctr_names[GCOV_COUNTERS] = GCOV_COUNTER_NAMES; | |
09780dfb | 123 | |
ca29da43 | 124 | /* Forward declarations. */ |
159b3be1 | 125 | static void read_counts_file (void); |
5366b186 NS |
126 | static tree build_var (tree, tree, int); |
127 | static void build_fn_info_type (tree, unsigned, tree); | |
b724567e NS |
128 | static void build_info_type (tree, tree); |
129 | static tree build_fn_info (const struct coverage_data *, tree, tree); | |
130 | static tree build_info (tree, tree); | |
131 | static bool coverage_obj_init (void); | |
9771b263 DN |
132 | static vec<constructor_elt, va_gc> *coverage_obj_fn |
133 | (vec<constructor_elt, va_gc> *, tree, struct coverage_data const *); | |
134 | static void coverage_obj_finish (vec<constructor_elt, va_gc> *); | |
251e2ff2 RS |
135 | \f |
136 | /* Return the type node for gcov_type. */ | |
137 | ||
138 | tree | |
139 | get_gcov_type (void) | |
140 | { | |
0f250839 RG |
141 | enum machine_mode mode = smallest_mode_for_size (GCOV_TYPE_SIZE, MODE_INT); |
142 | return lang_hooks.types.type_for_mode (mode, false); | |
251e2ff2 RS |
143 | } |
144 | ||
145 | /* Return the type node for gcov_unsigned_t. */ | |
ca29da43 | 146 | |
251e2ff2 RS |
147 | static tree |
148 | get_gcov_unsigned_t (void) | |
149 | { | |
0f250839 RG |
150 | enum machine_mode mode = smallest_mode_for_size (32, MODE_INT); |
151 | return lang_hooks.types.type_for_mode (mode, true); | |
251e2ff2 | 152 | } |
ca29da43 | 153 | \f |
0823efed | 154 | inline hashval_t |
5831a5f0 | 155 | counts_entry::hash (const value_type *entry) |
ca29da43 | 156 | { |
796621e8 | 157 | return entry->ident * GCOV_COUNTERS + entry->ctr; |
ca29da43 NS |
158 | } |
159 | ||
0823efed | 160 | inline int |
5831a5f0 LC |
161 | counts_entry::equal (const value_type *entry1, |
162 | const compare_type *entry2) | |
ca29da43 | 163 | { |
796621e8 | 164 | return entry1->ident == entry2->ident && entry1->ctr == entry2->ctr; |
ca29da43 NS |
165 | } |
166 | ||
0823efed | 167 | inline void |
5831a5f0 | 168 | counts_entry::remove (value_type *entry) |
ca29da43 | 169 | { |
ca29da43 NS |
170 | free (entry->counts); |
171 | free (entry); | |
172 | } | |
173 | ||
0823efed | 174 | /* Hash table of count data. */ |
5deac340 | 175 | static hash_table <counts_entry> counts_hash; |
0823efed | 176 | |
ca29da43 NS |
177 | /* Read in the counts file, if available. */ |
178 | ||
179 | static void | |
159b3be1 | 180 | read_counts_file (void) |
ca29da43 | 181 | { |
9b514d25 | 182 | gcov_unsigned_t fn_ident = 0; |
5366b186 NS |
183 | struct gcov_summary summary; |
184 | unsigned new_summary = 1; | |
7d63a2fa | 185 | gcov_unsigned_t tag; |
24a4a033 | 186 | int is_error = 0; |
10adac51 XDL |
187 | unsigned lineno_checksum = 0; |
188 | unsigned cfg_checksum = 0; | |
7d63a2fa | 189 | |
ca29da43 NS |
190 | if (!gcov_open (da_file_name, 1)) |
191 | return; | |
159b3be1 | 192 | |
160e2e4f | 193 | if (!gcov_magic (gcov_read_unsigned (), GCOV_DATA_MAGIC)) |
ca29da43 | 194 | { |
d4ee4d25 | 195 | warning (0, "%qs is not a gcov data file", da_file_name); |
ca29da43 NS |
196 | gcov_close (); |
197 | return; | |
198 | } | |
160e2e4f | 199 | else if ((tag = gcov_read_unsigned ()) != GCOV_VERSION) |
ca29da43 | 200 | { |
330d2e2a NS |
201 | char v[4], e[4]; |
202 | ||
203 | GCOV_UNSIGNED2STRING (v, tag); | |
204 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION); | |
159b3be1 | 205 | |
d4ee4d25 | 206 | warning (0, "%qs is version %q.*s, expected version %q.*s", |
cb83302c | 207 | da_file_name, 4, v, 4, e); |
ca29da43 NS |
208 | gcov_close (); |
209 | return; | |
210 | } | |
159b3be1 | 211 | |
cb686b99 NS |
212 | /* Read the stamp, used for creating a generation count. */ |
213 | tag = gcov_read_unsigned (); | |
214 | bbg_file_stamp = crc32_unsigned (bbg_file_stamp, tag); | |
b8698a0f | 215 | |
0823efed | 216 | counts_hash.create (10); |
7d63a2fa | 217 | while ((tag = gcov_read_unsigned ())) |
ca29da43 | 218 | { |
7d63a2fa | 219 | gcov_unsigned_t length; |
9b514d25 | 220 | gcov_position_t offset; |
159b3be1 | 221 | |
ca29da43 NS |
222 | length = gcov_read_unsigned (); |
223 | offset = gcov_position (); | |
224 | if (tag == GCOV_TAG_FUNCTION) | |
225 | { | |
5366b186 | 226 | if (length) |
ca29da43 | 227 | { |
5366b186 NS |
228 | fn_ident = gcov_read_unsigned (); |
229 | lineno_checksum = gcov_read_unsigned (); | |
230 | cfg_checksum = gcov_read_unsigned (); | |
ca29da43 | 231 | } |
5366b186 NS |
232 | else |
233 | fn_ident = lineno_checksum = cfg_checksum = 0; | |
234 | new_summary = 1; | |
ca29da43 NS |
235 | } |
236 | else if (tag == GCOV_TAG_PROGRAM_SUMMARY) | |
237 | { | |
5366b186 NS |
238 | struct gcov_summary sum; |
239 | unsigned ix; | |
159b3be1 | 240 | |
5366b186 NS |
241 | if (new_summary) |
242 | memset (&summary, 0, sizeof (summary)); | |
159b3be1 | 243 | |
5366b186 NS |
244 | gcov_read_summary (&sum); |
245 | for (ix = 0; ix != GCOV_COUNTERS_SUMMABLE; ix++) | |
246 | { | |
247 | summary.ctrs[ix].runs += sum.ctrs[ix].runs; | |
248 | summary.ctrs[ix].sum_all += sum.ctrs[ix].sum_all; | |
249 | if (summary.ctrs[ix].run_max < sum.ctrs[ix].run_max) | |
250 | summary.ctrs[ix].run_max = sum.ctrs[ix].run_max; | |
251 | summary.ctrs[ix].sum_max += sum.ctrs[ix].sum_max; | |
ca29da43 | 252 | } |
9f71de84 TJ |
253 | if (new_summary) |
254 | memcpy (summary.ctrs[GCOV_COUNTER_ARCS].histogram, | |
255 | sum.ctrs[GCOV_COUNTER_ARCS].histogram, | |
256 | sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE); | |
257 | else | |
258 | gcov_histogram_merge (summary.ctrs[GCOV_COUNTER_ARCS].histogram, | |
259 | sum.ctrs[GCOV_COUNTER_ARCS].histogram); | |
5366b186 | 260 | new_summary = 0; |
ca29da43 | 261 | } |
796621e8 | 262 | else if (GCOV_TAG_IS_COUNTER (tag) && fn_ident) |
ca29da43 NS |
263 | { |
264 | counts_entry_t **slot, *entry, elt; | |
330d2e2a | 265 | unsigned n_counts = GCOV_TAG_COUNTER_NUM (length); |
ca29da43 NS |
266 | unsigned ix; |
267 | ||
796621e8 | 268 | elt.ident = fn_ident; |
cdb23767 | 269 | elt.ctr = GCOV_COUNTER_FOR_TAG (tag); |
ca29da43 | 270 | |
0823efed | 271 | slot = counts_hash.find_slot (&elt, INSERT); |
ca29da43 NS |
272 | entry = *slot; |
273 | if (!entry) | |
274 | { | |
5ed6ace5 | 275 | *slot = entry = XCNEW (counts_entry_t); |
10adac51 | 276 | entry->ident = fn_ident; |
cdb23767 | 277 | entry->ctr = elt.ctr; |
10adac51 XDL |
278 | entry->lineno_checksum = lineno_checksum; |
279 | entry->cfg_checksum = cfg_checksum; | |
9f71de84 TJ |
280 | if (elt.ctr < GCOV_COUNTERS_SUMMABLE) |
281 | entry->summary = summary.ctrs[elt.ctr]; | |
282 | entry->summary.num = n_counts; | |
5ed6ace5 | 283 | entry->counts = XCNEWVEC (gcov_type, n_counts); |
ca29da43 | 284 | } |
10adac51 XDL |
285 | else if (entry->lineno_checksum != lineno_checksum |
286 | || entry->cfg_checksum != cfg_checksum) | |
ca29da43 | 287 | { |
10adac51 XDL |
288 | error ("Profile data for function %u is corrupted", fn_ident); |
289 | error ("checksum is (%x,%x) instead of (%x,%x)", | |
290 | entry->lineno_checksum, entry->cfg_checksum, | |
291 | lineno_checksum, cfg_checksum); | |
0823efed | 292 | counts_hash.dispose (); |
24a4a033 JH |
293 | break; |
294 | } | |
295 | else if (entry->summary.num != n_counts) | |
296 | { | |
10adac51 | 297 | error ("Profile data for function %u is corrupted", fn_ident); |
24a4a033 | 298 | error ("number of counters is %d instead of %d", entry->summary.num, n_counts); |
0823efed | 299 | counts_hash.dispose (); |
ca29da43 NS |
300 | break; |
301 | } | |
9b514d25 NS |
302 | else if (elt.ctr >= GCOV_COUNTERS_SUMMABLE) |
303 | { | |
24a4a033 JH |
304 | error ("cannot merge separate %s counters for function %u", |
305 | ctr_names[elt.ctr], fn_ident); | |
9b514d25 NS |
306 | goto skip_merge; |
307 | } | |
5366b186 | 308 | else |
ca29da43 | 309 | { |
5366b186 NS |
310 | entry->summary.runs += summary.ctrs[elt.ctr].runs; |
311 | entry->summary.sum_all += summary.ctrs[elt.ctr].sum_all; | |
312 | if (entry->summary.run_max < summary.ctrs[elt.ctr].run_max) | |
313 | entry->summary.run_max = summary.ctrs[elt.ctr].run_max; | |
314 | entry->summary.sum_max += summary.ctrs[elt.ctr].sum_max; | |
ca29da43 NS |
315 | } |
316 | for (ix = 0; ix != n_counts; ix++) | |
317 | entry->counts[ix] += gcov_read_counter (); | |
9b514d25 | 318 | skip_merge:; |
ca29da43 | 319 | } |
474f141e | 320 | gcov_sync (offset, length); |
24a4a033 | 321 | if ((is_error = gcov_is_error ())) |
00cf2913 | 322 | { |
971801ff | 323 | error (is_error < 0 ? "%qs has overflowed" : "%qs is corrupted", |
00cf2913 | 324 | da_file_name); |
0823efed | 325 | counts_hash.dispose (); |
00cf2913 NS |
326 | break; |
327 | } | |
7d63a2fa | 328 | } |
159b3be1 | 329 | |
ca29da43 NS |
330 | gcov_close (); |
331 | } | |
332 | ||
333 | /* Returns the counters for a particular tag. */ | |
334 | ||
335 | gcov_type * | |
cdb23767 | 336 | get_coverage_counts (unsigned counter, unsigned expected, |
10adac51 | 337 | unsigned cfg_checksum, unsigned lineno_checksum, |
cdb23767 | 338 | const struct gcov_ctr_summary **summary) |
ca29da43 NS |
339 | { |
340 | counts_entry_t *entry, elt; | |
341 | ||
71c0e7fc | 342 | /* No hash table, no counts. */ |
0823efed | 343 | if (!counts_hash.is_created ()) |
ca29da43 NS |
344 | { |
345 | static int warned = 0; | |
346 | ||
103ff0d6 TJ |
347 | if (!warned++ && dump_enabled_p ()) |
348 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, | |
349 | (flag_guess_branch_prob | |
753b9bc3 | 350 | ? "file %s not found, execution counts estimated\n" |
103ff0d6 | 351 | : "file %s not found, execution counts assumed to " |
e645e942 | 352 | "be zero\n"), |
103ff0d6 | 353 | da_file_name); |
ca29da43 NS |
354 | return NULL; |
355 | } | |
356 | ||
6d70e6be | 357 | elt.ident = current_function_funcdef_no + 1; |
cdb23767 | 358 | elt.ctr = counter; |
0823efed | 359 | entry = counts_hash.find (&elt); |
5366b186 NS |
360 | if (!entry || !entry->summary.num) |
361 | /* The function was not emitted, or is weak and not chosen in the | |
362 | final executable. Silently fail, because there's nothing we | |
363 | can do about it. */ | |
364 | return NULL; | |
365 | ||
10adac51 | 366 | if (entry->cfg_checksum != cfg_checksum |
16c1c158 | 367 | || entry->summary.num != expected) |
24a4a033 | 368 | { |
16c1c158 | 369 | static int warned = 0; |
650cfcab | 370 | bool warning_printed = false; |
4f1e4960 | 371 | tree id = DECL_ASSEMBLER_NAME (current_function_decl); |
16c1c158 | 372 | |
10adac51 XDL |
373 | warning_printed = |
374 | warning_at (input_location, OPT_Wcoverage_mismatch, | |
5366b186 | 375 | "the control flow of function %qE does not match " |
10adac51 | 376 | "its profile data (counter %qs)", id, ctr_names[counter]); |
103ff0d6 | 377 | if (warning_printed && dump_enabled_p ()) |
16c1c158 | 378 | { |
103ff0d6 TJ |
379 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, |
380 | "use -Wno-error=coverage-mismatch to tolerate " | |
381 | "the mismatch but performance may drop if the " | |
e645e942 | 382 | "function is hot\n"); |
650cfcab | 383 | |
1da2ed5f | 384 | if (!seen_error () |
650cfcab NV |
385 | && !warned++) |
386 | { | |
103ff0d6 | 387 | dump_printf_loc (MSG_OPTIMIZED_LOCATIONS, input_location, |
e645e942 TJ |
388 | "coverage mismatch ignored\n"); |
389 | dump_printf (MSG_OPTIMIZED_LOCATIONS, | |
390 | flag_guess_branch_prob | |
391 | ? G_("execution counts estimated\n") | |
392 | : G_("execution counts assumed to be zero\n")); | |
650cfcab | 393 | if (!flag_guess_branch_prob) |
e645e942 TJ |
394 | dump_printf (MSG_OPTIMIZED_LOCATIONS, |
395 | "this can result in poorly optimized code\n"); | |
650cfcab | 396 | } |
16c1c158 RG |
397 | } |
398 | ||
399 | return NULL; | |
ca29da43 | 400 | } |
5366b186 NS |
401 | else if (entry->lineno_checksum != lineno_checksum) |
402 | { | |
b724567e | 403 | warning (0, "source locations for function %qE have changed," |
5366b186 NS |
404 | " the profile data may be out of date", |
405 | DECL_ASSEMBLER_NAME (current_function_decl)); | |
406 | } | |
159b3be1 | 407 | |
cdb23767 NS |
408 | if (summary) |
409 | *summary = &entry->summary; | |
ca29da43 NS |
410 | |
411 | return entry->counts; | |
412 | } | |
cdb23767 | 413 | |
6356f892 | 414 | /* Allocate NUM counters of type COUNTER. Returns nonzero if the |
6d70e6be | 415 | allocation succeeded. */ |
cdb23767 | 416 | |
6d70e6be NS |
417 | int |
418 | coverage_counter_alloc (unsigned counter, unsigned num) | |
cdb23767 | 419 | { |
6d70e6be NS |
420 | if (no_coverage) |
421 | return 0; | |
159b3be1 | 422 | |
6d70e6be NS |
423 | if (!num) |
424 | return 1; | |
159b3be1 | 425 | |
5366b186 | 426 | if (!fn_v_ctrs[counter]) |
cdb23767 | 427 | { |
5366b186 NS |
428 | tree array_type = build_array_type (get_gcov_type (), NULL_TREE); |
429 | ||
430 | fn_v_ctrs[counter] | |
431 | = build_var (current_function_decl, array_type, counter); | |
cdb23767 | 432 | } |
5366b186 | 433 | |
6d70e6be NS |
434 | fn_b_ctrs[counter] = fn_n_ctrs[counter]; |
435 | fn_n_ctrs[counter] += num; | |
5366b186 | 436 | |
6d70e6be NS |
437 | fn_ctr_mask |= 1 << counter; |
438 | return 1; | |
439 | } | |
cdb23767 | 440 | |
6de9cd9a DN |
441 | /* Generate a tree to access COUNTER NO. */ |
442 | ||
443 | tree | |
444 | tree_coverage_counter_ref (unsigned counter, unsigned no) | |
445 | { | |
070e3969 | 446 | tree gcov_type_node = get_gcov_type (); |
6de9cd9a | 447 | |
341c100f | 448 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); |
6de9cd9a | 449 | |
5366b186 NS |
450 | no += fn_b_ctrs[counter]; |
451 | ||
6de9cd9a | 452 | /* "no" here is an array index, scaled to bytes later. */ |
5366b186 | 453 | return build4 (ARRAY_REF, gcov_type_node, fn_v_ctrs[counter], |
f81b1a3d | 454 | build_int_cst (integer_type_node, no), NULL, NULL); |
6de9cd9a | 455 | } |
fc9161c1 RG |
456 | |
457 | /* Generate a tree to access the address of COUNTER NO. */ | |
458 | ||
459 | tree | |
460 | tree_coverage_counter_addr (unsigned counter, unsigned no) | |
461 | { | |
462 | tree gcov_type_node = get_gcov_type (); | |
463 | ||
464 | gcc_assert (no < fn_n_ctrs[counter] - fn_b_ctrs[counter]); | |
5366b186 | 465 | no += fn_b_ctrs[counter]; |
628c189e | 466 | |
fc9161c1 RG |
467 | /* "no" here is an array index, scaled to bytes later. */ |
468 | return build_fold_addr_expr (build4 (ARRAY_REF, gcov_type_node, | |
5366b186 | 469 | fn_v_ctrs[counter], |
f81b1a3d | 470 | build_int_cst (integer_type_node, no), |
fc9161c1 RG |
471 | NULL, NULL)); |
472 | } | |
ca29da43 | 473 | \f |
10adac51 | 474 | |
ca29da43 | 475 | /* Generate a checksum for a string. CHKSUM is the current |
71c0e7fc | 476 | checksum. */ |
ca29da43 NS |
477 | |
478 | static unsigned | |
20c361f3 | 479 | coverage_checksum_string (unsigned chksum, const char *string) |
ca29da43 | 480 | { |
20c361f3 JH |
481 | int i; |
482 | char *dup = NULL; | |
483 | ||
484 | /* Look for everything that looks if it were produced by | |
5880f14f | 485 | get_file_function_name and zero out the second part |
20c361f3 JH |
486 | that may result from flag_random_seed. This is not critical |
487 | as the checksums are used only for sanity checking. */ | |
488 | for (i = 0; string[i]; i++) | |
ca29da43 | 489 | { |
2b557972 JH |
490 | int offset = 0; |
491 | if (!strncmp (string + i, "_GLOBAL__N_", 11)) | |
492 | offset = 11; | |
20c361f3 | 493 | if (!strncmp (string + i, "_GLOBAL__", 9)) |
2b557972 JH |
494 | offset = 9; |
495 | ||
496 | /* C++ namespaces do have scheme: | |
497 | _GLOBAL__N_<filename>_<wrongmagicnumber>_<magicnumber>functionname | |
498 | since filename might contain extra underscores there seems | |
499 | to be no better chance then walk all possible offsets looking | |
fa10beec | 500 | for magicnumber. */ |
2b557972 | 501 | if (offset) |
1f651229 JH |
502 | { |
503 | for (i = i + offset; string[i]; i++) | |
504 | if (string[i]=='_') | |
505 | { | |
506 | int y; | |
507 | ||
508 | for (y = 1; y < 9; y++) | |
509 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
510 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
511 | break; | |
512 | if (y != 9 || string[i + 9] != '_') | |
513 | continue; | |
514 | for (y = 10; y < 18; y++) | |
515 | if (!(string[i + y] >= '0' && string[i + y] <= '9') | |
516 | && !(string[i + y] >= 'A' && string[i + y] <= 'F')) | |
517 | break; | |
518 | if (y != 18) | |
519 | continue; | |
520 | if (!dup) | |
521 | string = dup = xstrdup (string); | |
522 | for (y = 10; y < 18; y++) | |
523 | dup[i + y] = '0'; | |
524 | } | |
525 | break; | |
526 | } | |
ca29da43 | 527 | } |
20c361f3 JH |
528 | |
529 | chksum = crc32_string (chksum, string); | |
04695783 | 530 | free (dup); |
159b3be1 | 531 | |
ca29da43 NS |
532 | return chksum; |
533 | } | |
534 | ||
535 | /* Compute checksum for the current function. We generate a CRC32. */ | |
536 | ||
10adac51 XDL |
537 | unsigned |
538 | coverage_compute_lineno_checksum (void) | |
ca29da43 | 539 | { |
a281759f PB |
540 | expanded_location xloc |
541 | = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); | |
542 | unsigned chksum = xloc.line; | |
ca29da43 | 543 | |
a281759f | 544 | chksum = coverage_checksum_string (chksum, xloc.file); |
20c361f3 | 545 | chksum = coverage_checksum_string |
ca29da43 NS |
546 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl))); |
547 | ||
548 | return chksum; | |
549 | } | |
10adac51 | 550 | |
2fa3d31b JH |
551 | /* Compute profile ID. This is better to be unique in whole program. */ |
552 | ||
553 | unsigned | |
554 | coverage_compute_profile_id (struct cgraph_node *n) | |
555 | { | |
556 | expanded_location xloc | |
67348ccc | 557 | = expand_location (DECL_SOURCE_LOCATION (n->decl)); |
2fa3d31b JH |
558 | unsigned chksum = xloc.line; |
559 | ||
560 | chksum = coverage_checksum_string (chksum, xloc.file); | |
561 | chksum = coverage_checksum_string | |
67348ccc | 562 | (chksum, IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (n->decl))); |
2fa3d31b JH |
563 | if (first_global_object_name) |
564 | chksum = coverage_checksum_string | |
565 | (chksum, first_global_object_name); | |
566 | chksum = coverage_checksum_string | |
567 | (chksum, aux_base_name); | |
568 | ||
569 | /* Non-negative integers are hopefully small enough to fit in all targets. */ | |
570 | return chksum & 0x7fffffff; | |
571 | } | |
572 | ||
10adac51 XDL |
573 | /* Compute cfg checksum for the current function. |
574 | The checksum is calculated carefully so that | |
575 | source code changes that doesn't affect the control flow graph | |
576 | won't change the checksum. | |
577 | This is to make the profile data useable across source code change. | |
578 | The downside of this is that the compiler may use potentially | |
579 | wrong profile data - that the source code change has non-trivial impact | |
580 | on the validity of profile data (e.g. the reversed condition) | |
581 | but the compiler won't detect the change and use the wrong profile data. */ | |
582 | ||
583 | unsigned | |
584 | coverage_compute_cfg_checksum (void) | |
585 | { | |
586 | basic_block bb; | |
587 | unsigned chksum = n_basic_blocks; | |
588 | ||
589 | FOR_EACH_BB (bb) | |
590 | { | |
591 | edge e; | |
592 | edge_iterator ei; | |
593 | chksum = crc32_byte (chksum, bb->index); | |
594 | FOR_EACH_EDGE (e, ei, bb->succs) | |
595 | { | |
596 | chksum = crc32_byte (chksum, e->dest->index); | |
597 | } | |
598 | } | |
599 | ||
600 | return chksum; | |
601 | } | |
ca29da43 | 602 | \f |
efbb59b2 | 603 | /* Begin output to the notes file for the current function. |
b724567e | 604 | Writes the function header. Returns nonzero if data should be output. */ |
ca29da43 NS |
605 | |
606 | int | |
b724567e | 607 | coverage_begin_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 | 608 | { |
b724567e NS |
609 | expanded_location xloc; |
610 | unsigned long offset; | |
611 | ||
2f908293 SP |
612 | /* We don't need to output .gcno file unless we're under -ftest-coverage |
613 | (e.g. -fprofile-arcs/generate/use don't need .gcno to work). */ | |
b724567e | 614 | if (no_coverage || !bbg_file_name) |
6d70e6be | 615 | return 0; |
159b3be1 | 616 | |
b724567e | 617 | xloc = expand_location (DECL_SOURCE_LOCATION (current_function_decl)); |
10adac51 | 618 | |
b724567e NS |
619 | /* Announce function */ |
620 | offset = gcov_write_tag (GCOV_TAG_FUNCTION); | |
621 | gcov_write_unsigned (current_function_funcdef_no + 1); | |
622 | gcov_write_unsigned (lineno_checksum); | |
623 | gcov_write_unsigned (cfg_checksum); | |
624 | gcov_write_string (IDENTIFIER_POINTER | |
625 | (DECL_ASSEMBLER_NAME (current_function_decl))); | |
626 | gcov_write_string (xloc.file); | |
627 | gcov_write_unsigned (xloc.line); | |
628 | gcov_write_length (offset); | |
ca29da43 | 629 | |
ca29da43 NS |
630 | return !gcov_is_error (); |
631 | } | |
632 | ||
633 | /* Finish coverage data for the current function. Verify no output | |
634 | error has occurred. Save function coverage counts. */ | |
635 | ||
636 | void | |
10adac51 | 637 | coverage_end_function (unsigned lineno_checksum, unsigned cfg_checksum) |
ca29da43 NS |
638 | { |
639 | unsigned i; | |
159b3be1 | 640 | |
b724567e | 641 | if (bbg_file_name && gcov_is_error ()) |
159b3be1 | 642 | { |
d4ee4d25 | 643 | warning (0, "error writing %qs", bbg_file_name); |
b724567e NS |
644 | unlink (bbg_file_name); |
645 | bbg_file_name = NULL; | |
ca29da43 | 646 | } |
cdb23767 | 647 | |
2ac69a0c | 648 | if (fn_ctr_mask) |
cdb23767 | 649 | { |
2ac69a0c NS |
650 | struct coverage_data *item = 0; |
651 | ||
652 | /* If the function is extern (i.e. extern inline), then we won't | |
653 | be outputting it, so don't chain it onto the function | |
654 | list. */ | |
655 | if (!DECL_EXTERNAL (current_function_decl)) | |
656 | { | |
657 | item = ggc_alloc_coverage_data (); | |
658 | ||
659 | item->ident = current_function_funcdef_no + 1; | |
660 | item->lineno_checksum = lineno_checksum; | |
661 | item->cfg_checksum = cfg_checksum; | |
662 | ||
663 | item->fn_decl = current_function_decl; | |
664 | item->next = 0; | |
665 | *functions_tail = item; | |
666 | functions_tail = &item->next; | |
667 | } | |
10adac51 | 668 | |
cdb23767 NS |
669 | for (i = 0; i != GCOV_COUNTERS; i++) |
670 | { | |
5366b186 | 671 | tree var = fn_v_ctrs[i]; |
2ac69a0c NS |
672 | |
673 | if (item) | |
674 | item->ctr_vars[i] = var; | |
5366b186 NS |
675 | if (var) |
676 | { | |
677 | tree array_type = build_index_type (size_int (fn_n_ctrs[i] - 1)); | |
678 | array_type = build_array_type (get_gcov_type (), array_type); | |
679 | TREE_TYPE (var) = array_type; | |
680 | DECL_SIZE (var) = TYPE_SIZE (array_type); | |
681 | DECL_SIZE_UNIT (var) = TYPE_SIZE_UNIT (array_type); | |
682 | varpool_finalize_decl (var); | |
683 | } | |
2ac69a0c | 684 | |
5366b186 NS |
685 | fn_b_ctrs[i] = fn_n_ctrs[i] = 0; |
686 | fn_v_ctrs[i] = NULL_TREE; | |
cdb23767 NS |
687 | } |
688 | prg_ctr_mask |= fn_ctr_mask; | |
689 | fn_ctr_mask = 0; | |
690 | } | |
ca29da43 NS |
691 | } |
692 | ||
5366b186 | 693 | /* Build a coverage variable of TYPE for function FN_DECL. If COUNTER |
0e485da0 | 694 | >= 0 it is a counter array, otherwise it is the function structure. */ |
ca29da43 | 695 | |
ca29da43 | 696 | static tree |
5366b186 NS |
697 | build_var (tree fn_decl, tree type, int counter) |
698 | { | |
699 | tree var = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, type); | |
9e66e106 JJ |
700 | const char *fn_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fn_decl)); |
701 | char *buf; | |
702 | size_t fn_name_len, len; | |
703 | ||
704 | fn_name = targetm.strip_name_encoding (fn_name); | |
705 | fn_name_len = strlen (fn_name); | |
706 | buf = XALLOCAVEC (char, fn_name_len + 8 + sizeof (int) * 3); | |
5366b186 | 707 | |
5366b186 | 708 | if (counter < 0) |
9e66e106 | 709 | strcpy (buf, "__gcov__"); |
5366b186 | 710 | else |
9e66e106 JJ |
711 | sprintf (buf, "__gcov%u_", counter); |
712 | len = strlen (buf); | |
713 | #ifndef NO_DOT_IN_LABEL | |
714 | buf[len - 1] = '.'; | |
715 | #elif !defined NO_DOLLAR_IN_LABEL | |
716 | buf[len - 1] = '$'; | |
717 | #endif | |
718 | memcpy (buf + len, fn_name, fn_name_len + 1); | |
5366b186 | 719 | DECL_NAME (var) = get_identifier (buf); |
89b0c303 NS |
720 | TREE_STATIC (var) = 1; |
721 | TREE_ADDRESSABLE (var) = 1; | |
722 | DECL_ALIGN (var) = TYPE_ALIGN (type); | |
5366b186 NS |
723 | |
724 | return var; | |
725 | } | |
726 | ||
727 | /* Creates the gcov_fn_info RECORD_TYPE. */ | |
728 | ||
729 | static void | |
730 | build_fn_info_type (tree type, unsigned counters, tree gcov_info_type) | |
ca29da43 | 731 | { |
5366b186 | 732 | tree ctr_info = lang_hooks.types.make_type (RECORD_TYPE); |
ca29da43 | 733 | tree field, fields; |
cdb23767 | 734 | tree array_type; |
159b3be1 | 735 | |
5366b186 NS |
736 | gcc_assert (counters); |
737 | ||
738 | /* ctr_info::num */ | |
739 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
740 | get_gcov_unsigned_t ()); | |
741 | fields = field; | |
742 | ||
743 | /* ctr_info::values */ | |
744 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
745 | build_pointer_type (get_gcov_type ())); | |
746 | DECL_CHAIN (field) = fields; | |
747 | fields = field; | |
748 | ||
749 | finish_builtin_struct (ctr_info, "__gcov_ctr_info", fields, NULL_TREE); | |
750 | ||
751 | /* key */ | |
752 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
753 | build_pointer_type (build_qualified_type | |
754 | (gcov_info_type, TYPE_QUAL_CONST))); | |
755 | fields = field; | |
756 | ||
796621e8 | 757 | /* ident */ |
5366b186 NS |
758 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
759 | get_gcov_unsigned_t ()); | |
760 | DECL_CHAIN (field) = fields; | |
761 | fields = field; | |
762 | ||
10adac51 | 763 | /* lineno_checksum */ |
5366b186 NS |
764 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
765 | get_gcov_unsigned_t ()); | |
910ad8de | 766 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
767 | fields = field; |
768 | ||
10adac51 | 769 | /* cfg checksum */ |
5366b186 NS |
770 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
771 | get_gcov_unsigned_t ()); | |
10adac51 XDL |
772 | DECL_CHAIN (field) = fields; |
773 | fields = field; | |
774 | ||
f81b1a3d | 775 | array_type = build_index_type (size_int (counters - 1)); |
5366b186 | 776 | array_type = build_array_type (ctr_info, array_type); |
159b3be1 | 777 | |
ca29da43 | 778 | /* counters */ |
5366b186 | 779 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, array_type); |
910ad8de | 780 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
781 | fields = field; |
782 | ||
cdb23767 | 783 | finish_builtin_struct (type, "__gcov_fn_info", fields, NULL_TREE); |
ca29da43 NS |
784 | } |
785 | ||
b724567e NS |
786 | /* Returns a CONSTRUCTOR for a gcov_fn_info. DATA is |
787 | the coverage data for the function and TYPE is the gcov_fn_info | |
788 | RECORD_TYPE. KEY is the object file key. */ | |
cdb23767 | 789 | |
ca29da43 | 790 | static tree |
b724567e | 791 | build_fn_info (const struct coverage_data *data, tree type, tree key) |
ca29da43 | 792 | { |
cdb23767 | 793 | tree fields = TYPE_FIELDS (type); |
5366b186 | 794 | tree ctr_type; |
cdb23767 | 795 | unsigned ix; |
9771b263 DN |
796 | vec<constructor_elt, va_gc> *v1 = NULL; |
797 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 798 | |
5366b186 NS |
799 | /* key */ |
800 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
801 | build1 (ADDR_EXPR, TREE_TYPE (fields), key)); | |
802 | fields = DECL_CHAIN (fields); | |
803 | ||
796621e8 | 804 | /* ident */ |
f9b36bb3 KH |
805 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
806 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 807 | data->ident)); |
910ad8de | 808 | fields = DECL_CHAIN (fields); |
159b3be1 | 809 | |
10adac51 XDL |
810 | /* lineno_checksum */ |
811 | CONSTRUCTOR_APPEND_ELT (v1, fields, | |
812 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 813 | data->lineno_checksum)); |
10adac51 XDL |
814 | fields = DECL_CHAIN (fields); |
815 | ||
816 | /* cfg_checksum */ | |
f9b36bb3 KH |
817 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
818 | build_int_cstu (get_gcov_unsigned_t (), | |
b724567e | 819 | data->cfg_checksum)); |
910ad8de | 820 | fields = DECL_CHAIN (fields); |
159b3be1 | 821 | |
ca29da43 | 822 | /* counters */ |
5366b186 | 823 | ctr_type = TREE_TYPE (TREE_TYPE (fields)); |
cdb23767 NS |
824 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
825 | if (prg_ctr_mask & (1 << ix)) | |
5366b186 | 826 | { |
9771b263 | 827 | vec<constructor_elt, va_gc> *ctr = NULL; |
b724567e | 828 | tree var = data->ctr_vars[ix]; |
5366b186 NS |
829 | unsigned count = 0; |
830 | ||
831 | if (var) | |
832 | count | |
833 | = tree_low_cst (TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (var))), 0) | |
834 | + 1; | |
835 | ||
836 | CONSTRUCTOR_APPEND_ELT (ctr, TYPE_FIELDS (ctr_type), | |
837 | build_int_cstu (get_gcov_unsigned_t (), | |
838 | count)); | |
839 | ||
840 | if (var) | |
841 | CONSTRUCTOR_APPEND_ELT (ctr, DECL_CHAIN (TYPE_FIELDS (ctr_type)), | |
842 | build_fold_addr_expr (var)); | |
843 | ||
844 | CONSTRUCTOR_APPEND_ELT (v2, NULL, build_constructor (ctr_type, ctr)); | |
845 | } | |
846 | ||
f9b36bb3 KH |
847 | CONSTRUCTOR_APPEND_ELT (v1, fields, |
848 | build_constructor (TREE_TYPE (fields), v2)); | |
159b3be1 | 849 | |
f9b36bb3 | 850 | return build_constructor (type, v1); |
ca29da43 NS |
851 | } |
852 | ||
b724567e NS |
853 | /* Create gcov_info struct. TYPE is the incomplete RECORD_TYPE to be |
854 | completed, and FN_INFO_PTR_TYPE is a pointer to the function info type. */ | |
cdb23767 | 855 | |
5366b186 | 856 | static void |
b724567e | 857 | build_info_type (tree type, tree fn_info_ptr_type) |
ca29da43 | 858 | { |
cdb23767 | 859 | tree field, fields = NULL_TREE; |
b724567e | 860 | tree merge_fn_type; |
9b514d25 | 861 | |
5366b186 NS |
862 | /* Version ident */ |
863 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
864 | get_gcov_unsigned_t ()); | |
910ad8de | 865 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
866 | fields = field; |
867 | ||
5366b186 NS |
868 | /* next pointer */ |
869 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
870 | build_pointer_type (build_qualified_type | |
871 | (type, TYPE_QUAL_CONST))); | |
910ad8de | 872 | DECL_CHAIN (field) = fields; |
ca29da43 NS |
873 | fields = field; |
874 | ||
5366b186 NS |
875 | /* stamp */ |
876 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
877 | get_gcov_unsigned_t ()); | |
910ad8de | 878 | DECL_CHAIN (field) = fields; |
09780dfb ZD |
879 | fields = field; |
880 | ||
5366b186 NS |
881 | /* Filename */ |
882 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
883 | build_pointer_type (build_qualified_type | |
884 | (char_type_node, TYPE_QUAL_CONST))); | |
885 | DECL_CHAIN (field) = fields; | |
886 | fields = field; | |
ca29da43 | 887 | |
5366b186 NS |
888 | /* merge fn array */ |
889 | merge_fn_type | |
890 | = build_function_type_list (void_type_node, | |
891 | build_pointer_type (get_gcov_type ()), | |
892 | get_gcov_unsigned_t (), NULL_TREE); | |
893 | merge_fn_type | |
894 | = build_array_type (build_pointer_type (merge_fn_type), | |
895 | build_index_type (size_int (GCOV_COUNTERS - 1))); | |
896 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
897 | merge_fn_type); | |
898 | DECL_CHAIN (field) = fields; | |
899 | fields = field; | |
900 | ||
901 | /* n_functions */ | |
902 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, | |
903 | get_gcov_unsigned_t ()); | |
904 | DECL_CHAIN (field) = fields; | |
905 | fields = field; | |
906 | ||
b724567e NS |
907 | /* function_info pointer pointer */ |
908 | fn_info_ptr_type = build_pointer_type | |
909 | (build_qualified_type (fn_info_ptr_type, TYPE_QUAL_CONST)); | |
5366b186 | 910 | field = build_decl (BUILTINS_LOCATION, FIELD_DECL, NULL_TREE, |
b724567e | 911 | fn_info_ptr_type); |
5366b186 NS |
912 | DECL_CHAIN (field) = fields; |
913 | fields = field; | |
09780dfb | 914 | |
5366b186 | 915 | finish_builtin_struct (type, "__gcov_info", fields, NULL_TREE); |
ca29da43 NS |
916 | } |
917 | ||
b724567e NS |
918 | /* Returns a CONSTRUCTOR for the gcov_info object. INFO_TYPE is the |
919 | gcov_info structure type, FN_ARY is the array of pointers to | |
920 | function info objects. */ | |
cdb23767 | 921 | |
ca29da43 | 922 | static tree |
b724567e | 923 | build_info (tree info_type, tree fn_ary) |
ca29da43 | 924 | { |
5366b186 | 925 | tree info_fields = TYPE_FIELDS (info_type); |
b724567e | 926 | tree merge_fn_type, n_funcs; |
5366b186 | 927 | unsigned ix; |
cdb23767 | 928 | tree filename_string; |
2f908293 | 929 | int da_file_name_len; |
9771b263 DN |
930 | vec<constructor_elt, va_gc> *v1 = NULL; |
931 | vec<constructor_elt, va_gc> *v2 = NULL; | |
159b3be1 | 932 | |
cdb23767 | 933 | /* Version ident */ |
5366b186 NS |
934 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
935 | build_int_cstu (TREE_TYPE (info_fields), | |
936 | GCOV_VERSION)); | |
937 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 938 | |
ca29da43 | 939 | /* next -- NULL */ |
5366b186 NS |
940 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, null_pointer_node); |
941 | info_fields = DECL_CHAIN (info_fields); | |
942 | ||
dd486eb2 | 943 | /* stamp */ |
5366b186 NS |
944 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
945 | build_int_cstu (TREE_TYPE (info_fields), | |
cb686b99 | 946 | bbg_file_stamp)); |
5366b186 | 947 | info_fields = DECL_CHAIN (info_fields); |
dd486eb2 | 948 | |
ca29da43 | 949 | /* Filename */ |
2f908293 SP |
950 | da_file_name_len = strlen (da_file_name); |
951 | filename_string = build_string (da_file_name_len + 1, da_file_name); | |
4a90aeeb | 952 | TREE_TYPE (filename_string) = build_array_type |
f81b1a3d | 953 | (char_type_node, build_index_type (size_int (da_file_name_len))); |
5366b186 NS |
954 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
955 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), | |
956 | filename_string)); | |
957 | info_fields = DECL_CHAIN (info_fields); | |
159b3be1 | 958 | |
5366b186 NS |
959 | /* merge fn array -- NULL slots indicate unmeasured counters */ |
960 | merge_fn_type = TREE_TYPE (TREE_TYPE (info_fields)); | |
961 | for (ix = 0; ix != GCOV_COUNTERS; ix++) | |
ca29da43 | 962 | { |
5366b186 | 963 | tree ptr = null_pointer_node; |
159b3be1 | 964 | |
5366b186 NS |
965 | if ((1u << ix) & prg_ctr_mask) |
966 | { | |
967 | tree merge_fn = build_decl (BUILTINS_LOCATION, | |
968 | FUNCTION_DECL, | |
969 | get_identifier (ctr_merge_functions[ix]), | |
970 | TREE_TYPE (merge_fn_type)); | |
971 | DECL_EXTERNAL (merge_fn) = 1; | |
972 | TREE_PUBLIC (merge_fn) = 1; | |
973 | DECL_ARTIFICIAL (merge_fn) = 1; | |
974 | TREE_NOTHROW (merge_fn) = 1; | |
975 | /* Initialize assembler name so we can stream out. */ | |
976 | DECL_ASSEMBLER_NAME (merge_fn); | |
977 | ptr = build1 (ADDR_EXPR, merge_fn_type, merge_fn); | |
978 | } | |
979 | CONSTRUCTOR_APPEND_ELT (v2, NULL, ptr); | |
ca29da43 | 980 | } |
5366b186 NS |
981 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
982 | build_constructor (TREE_TYPE (info_fields), v2)); | |
983 | info_fields = DECL_CHAIN (info_fields); | |
984 | ||
985 | /* n_functions */ | |
b724567e NS |
986 | n_funcs = TYPE_MAX_VALUE (TYPE_DOMAIN (TREE_TYPE (fn_ary))); |
987 | n_funcs = fold_build2 (PLUS_EXPR, TREE_TYPE (info_fields), | |
988 | n_funcs, size_one_node); | |
989 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, n_funcs); | |
5366b186 | 990 | info_fields = DECL_CHAIN (info_fields); |
5366b186 | 991 | |
b724567e | 992 | /* functions */ |
5366b186 | 993 | CONSTRUCTOR_APPEND_ELT (v1, info_fields, |
b724567e NS |
994 | build1 (ADDR_EXPR, TREE_TYPE (info_fields), fn_ary)); |
995 | info_fields = DECL_CHAIN (info_fields); | |
996 | ||
997 | gcc_assert (!info_fields); | |
5366b186 | 998 | return build_constructor (info_type, v1); |
ca29da43 NS |
999 | } |
1000 | ||
d6d7eee1 GW |
1001 | /* Generate the constructor function to call __gcov_init. */ |
1002 | ||
1003 | static void | |
1004 | build_init_ctor (tree gcov_info_type) | |
1005 | { | |
1006 | tree ctor, stmt, init_fn; | |
1007 | ||
1008 | /* Build a decl for __gcov_init. */ | |
1009 | init_fn = build_pointer_type (gcov_info_type); | |
1010 | init_fn = build_function_type_list (void_type_node, init_fn, NULL); | |
1011 | init_fn = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, | |
1012 | get_identifier ("__gcov_init"), init_fn); | |
1013 | TREE_PUBLIC (init_fn) = 1; | |
1014 | DECL_EXTERNAL (init_fn) = 1; | |
1015 | DECL_ASSEMBLER_NAME (init_fn); | |
1016 | ||
1017 | /* Generate a call to __gcov_init(&gcov_info). */ | |
1018 | ctor = NULL; | |
1019 | stmt = build_fold_addr_expr (gcov_info_var); | |
1020 | stmt = build_call_expr (init_fn, 1, stmt); | |
1021 | append_to_statement_list (stmt, &ctor); | |
1022 | ||
1023 | /* Generate a constructor to run it. */ | |
1024 | cgraph_build_static_cdtor ('I', ctor, DEFAULT_INIT_PRIORITY); | |
1025 | } | |
1026 | ||
b724567e NS |
1027 | /* Create the gcov_info types and object. Generate the constructor |
1028 | function to call __gcov_init. Does not generate the initializer | |
1029 | for the object. Returns TRUE if coverage data is being emitted. */ | |
ca29da43 | 1030 | |
b724567e NS |
1031 | static bool |
1032 | coverage_obj_init (void) | |
ca29da43 | 1033 | { |
d6d7eee1 | 1034 | tree gcov_info_type; |
b724567e | 1035 | unsigned n_counters = 0; |
5366b186 | 1036 | unsigned ix; |
b724567e NS |
1037 | struct coverage_data *fn; |
1038 | struct coverage_data **fn_prev; | |
c9b9aa64 | 1039 | char name_buf[32]; |
ca29da43 | 1040 | |
6d70e6be | 1041 | no_coverage = 1; /* Disable any further coverage. */ |
159b3be1 | 1042 | |
cdb23767 | 1043 | if (!prg_ctr_mask) |
b724567e | 1044 | return false; |
159b3be1 | 1045 | |
5366b186 NS |
1046 | if (cgraph_dump_file) |
1047 | fprintf (cgraph_dump_file, "Using data file %s\n", da_file_name); | |
ca29da43 | 1048 | |
b724567e | 1049 | /* Prune functions. */ |
5366b186 NS |
1050 | for (fn_prev = &functions_head; (fn = *fn_prev);) |
1051 | if (DECL_STRUCT_FUNCTION (fn->fn_decl)) | |
b724567e | 1052 | fn_prev = &fn->next; |
5366b186 NS |
1053 | else |
1054 | /* The function is not being emitted, remove from list. */ | |
1055 | *fn_prev = fn->next; | |
b724567e | 1056 | |
0f9fb22f JJ |
1057 | if (functions_head == NULL) |
1058 | return false; | |
1059 | ||
b724567e NS |
1060 | for (ix = 0; ix != GCOV_COUNTERS; ix++) |
1061 | if ((1u << ix) & prg_ctr_mask) | |
1062 | n_counters++; | |
5366b186 NS |
1063 | |
1064 | /* Build the info and fn_info types. These are mutually recursive. */ | |
1065 | gcov_info_type = lang_hooks.types.make_type (RECORD_TYPE); | |
b724567e NS |
1066 | gcov_fn_info_type = lang_hooks.types.make_type (RECORD_TYPE); |
1067 | gcov_fn_info_ptr_type = build_pointer_type | |
1068 | (build_qualified_type (gcov_fn_info_type, TYPE_QUAL_CONST)); | |
1069 | build_fn_info_type (gcov_fn_info_type, n_counters, gcov_info_type); | |
1070 | build_info_type (gcov_info_type, gcov_fn_info_ptr_type); | |
5366b186 NS |
1071 | |
1072 | /* Build the gcov info var, this is referred to in its own | |
1073 | initializer. */ | |
b724567e NS |
1074 | gcov_info_var = build_decl (BUILTINS_LOCATION, |
1075 | VAR_DECL, NULL_TREE, gcov_info_type); | |
1076 | TREE_STATIC (gcov_info_var) = 1; | |
c9b9aa64 | 1077 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 0); |
b724567e | 1078 | DECL_NAME (gcov_info_var) = get_identifier (name_buf); |
ca29da43 | 1079 | |
d6d7eee1 | 1080 | build_init_ctor (gcov_info_type); |
b724567e NS |
1081 | |
1082 | return true; | |
ca29da43 | 1083 | } |
b724567e NS |
1084 | |
1085 | /* Generate the coverage function info for FN and DATA. Append a | |
1086 | pointer to that object to CTOR and return the appended CTOR. */ | |
1087 | ||
9771b263 DN |
1088 | static vec<constructor_elt, va_gc> * |
1089 | coverage_obj_fn (vec<constructor_elt, va_gc> *ctor, tree fn, | |
b724567e NS |
1090 | struct coverage_data const *data) |
1091 | { | |
1092 | tree init = build_fn_info (data, gcov_fn_info_type, gcov_info_var); | |
1093 | tree var = build_var (fn, gcov_fn_info_type, -1); | |
1094 | ||
1095 | DECL_INITIAL (var) = init; | |
1096 | varpool_finalize_decl (var); | |
1097 | ||
1098 | CONSTRUCTOR_APPEND_ELT (ctor, NULL, | |
1099 | build1 (ADDR_EXPR, gcov_fn_info_ptr_type, var)); | |
1100 | return ctor; | |
1101 | } | |
1102 | ||
1103 | /* Finalize the coverage data. Generates the array of pointers to | |
1104 | function objects from CTOR. Generate the gcov_info initializer. */ | |
1105 | ||
1106 | static void | |
9771b263 | 1107 | coverage_obj_finish (vec<constructor_elt, va_gc> *ctor) |
b724567e | 1108 | { |
9771b263 | 1109 | unsigned n_functions = vec_safe_length (ctor); |
b724567e NS |
1110 | tree fn_info_ary_type = build_array_type |
1111 | (build_qualified_type (gcov_fn_info_ptr_type, TYPE_QUAL_CONST), | |
1112 | build_index_type (size_int (n_functions - 1))); | |
1113 | tree fn_info_ary = build_decl (BUILTINS_LOCATION, VAR_DECL, NULL_TREE, | |
1114 | fn_info_ary_type); | |
1115 | char name_buf[32]; | |
1116 | ||
1117 | TREE_STATIC (fn_info_ary) = 1; | |
1118 | ASM_GENERATE_INTERNAL_LABEL (name_buf, "LPBX", 1); | |
1119 | DECL_NAME (fn_info_ary) = get_identifier (name_buf); | |
1120 | DECL_INITIAL (fn_info_ary) = build_constructor (fn_info_ary_type, ctor); | |
1121 | varpool_finalize_decl (fn_info_ary); | |
1122 | ||
1123 | DECL_INITIAL (gcov_info_var) | |
1124 | = build_info (TREE_TYPE (gcov_info_var), fn_info_ary); | |
1125 | varpool_finalize_decl (gcov_info_var); | |
1126 | } | |
1127 | ||
ca29da43 | 1128 | /* Perform file-level initialization. Read in data file, generate name |
efbb59b2 | 1129 | of notes file. */ |
ca29da43 NS |
1130 | |
1131 | void | |
159b3be1 | 1132 | coverage_init (const char *filename) |
ca29da43 NS |
1133 | { |
1134 | int len = strlen (filename); | |
b724567e | 1135 | int prefix_len = 0; |
b8698a0f | 1136 | |
103ff0d6 TJ |
1137 | /* Since coverage_init is invoked very early, before the pass |
1138 | manager, we need to set up the dumping explicitly. This is | |
1139 | similar to the handling in finish_optimization_passes. */ | |
47e0da37 DM |
1140 | int profile_pass_num = |
1141 | g->get_passes ()->get_pass_profile ()->static_pass_number; | |
1142 | g->get_dumps ()->dump_start (profile_pass_num, NULL); | |
103ff0d6 | 1143 | |
b724567e | 1144 | if (!profile_data_prefix && !IS_ABSOLUTE_PATH (filename)) |
2f908293 SP |
1145 | profile_data_prefix = getpwd (); |
1146 | ||
b724567e NS |
1147 | if (profile_data_prefix) |
1148 | prefix_len = strlen (profile_data_prefix); | |
ca29da43 | 1149 | |
796621e8 | 1150 | /* Name of da file. */ |
b8698a0f | 1151 | da_file_name = XNEWVEC (char, len + strlen (GCOV_DATA_SUFFIX) |
b724567e | 1152 | + prefix_len + 2); |
2f908293 SP |
1153 | |
1154 | if (profile_data_prefix) | |
1155 | { | |
b724567e NS |
1156 | memcpy (da_file_name, profile_data_prefix, prefix_len); |
1157 | da_file_name[prefix_len++] = '/'; | |
2f908293 | 1158 | } |
b724567e NS |
1159 | memcpy (da_file_name + prefix_len, filename, len); |
1160 | strcpy (da_file_name + prefix_len + len, GCOV_DATA_SUFFIX); | |
159b3be1 | 1161 | |
cb686b99 NS |
1162 | bbg_file_stamp = local_tick; |
1163 | ||
1164 | if (flag_branch_probabilities) | |
1165 | read_counts_file (); | |
1166 | ||
796621e8 | 1167 | /* Name of bbg file. */ |
b724567e NS |
1168 | if (flag_test_coverage && !flag_compare_debug) |
1169 | { | |
1170 | bbg_file_name = XNEWVEC (char, len + strlen (GCOV_NOTE_SUFFIX) + 1); | |
1171 | memcpy (bbg_file_name, filename, len); | |
1172 | strcpy (bbg_file_name + len, GCOV_NOTE_SUFFIX); | |
1173 | ||
1174 | if (!gcov_open (bbg_file_name, -1)) | |
1175 | { | |
1176 | error ("cannot open %s", bbg_file_name); | |
1177 | bbg_file_name = NULL; | |
1178 | } | |
1179 | else | |
1180 | { | |
1181 | gcov_write_unsigned (GCOV_NOTE_MAGIC); | |
1182 | gcov_write_unsigned (GCOV_VERSION); | |
cb686b99 | 1183 | gcov_write_unsigned (bbg_file_stamp); |
b724567e NS |
1184 | } |
1185 | } | |
103ff0d6 | 1186 | |
47e0da37 | 1187 | g->get_dumps ()->dump_finish (profile_pass_num); |
ca29da43 NS |
1188 | } |
1189 | ||
efbb59b2 | 1190 | /* Performs file-level cleanup. Close notes file, generate coverage |
ca29da43 NS |
1191 | variables and constructor. */ |
1192 | ||
1193 | void | |
159b3be1 | 1194 | coverage_finish (void) |
ca29da43 | 1195 | { |
b724567e NS |
1196 | if (bbg_file_name && gcov_close ()) |
1197 | unlink (bbg_file_name); | |
cb686b99 NS |
1198 | |
1199 | if (!flag_branch_probabilities && flag_test_coverage | |
1200 | && (!local_tick || local_tick == (unsigned)-1)) | |
1201 | /* Only remove the da file, if we're emitting coverage code and | |
1202 | cannot uniquely stamp it. If we can stamp it, libgcov will DTRT. */ | |
b724567e NS |
1203 | unlink (da_file_name); |
1204 | ||
1205 | if (coverage_obj_init ()) | |
ca29da43 | 1206 | { |
9771b263 | 1207 | vec<constructor_elt, va_gc> *fn_ctor = NULL; |
b724567e NS |
1208 | struct coverage_data *fn; |
1209 | ||
1210 | for (fn = functions_head; fn; fn = fn->next) | |
1211 | fn_ctor = coverage_obj_fn (fn_ctor, fn->fn_decl, fn); | |
1212 | coverage_obj_finish (fn_ctor); | |
ca29da43 | 1213 | } |
782f0db2 DM |
1214 | |
1215 | XDELETEVEC (da_file_name); | |
1216 | da_file_name = NULL; | |
ca29da43 NS |
1217 | } |
1218 | ||
ca29da43 | 1219 | #include "gt-coverage.h" |