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67745126 | 1 | /* Header file for libgcov-*.c. |
aad93da1 | 2 | Copyright (C) 1996-2017 Free Software Foundation, Inc. |
67745126 | 3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | Under Section 7 of GPL version 3, you are granted additional | |
17 | permissions described in the GCC Runtime Library Exception, version | |
18 | 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | You should have received a copy of the GNU General Public License and | |
21 | a copy of the GCC Runtime Library Exception along with this program; | |
22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | <http://www.gnu.org/licenses/>. */ | |
24 | ||
25 | #ifndef GCC_LIBGCOV_H | |
26 | #define GCC_LIBGCOV_H | |
27 | ||
28 | /* work around the poisoned malloc/calloc in system.h. */ | |
29 | #ifndef xmalloc | |
30 | #define xmalloc malloc | |
31 | #endif | |
32 | #ifndef xcalloc | |
33 | #define xcalloc calloc | |
34 | #endif | |
35 | ||
e76f6040 | 36 | #ifndef IN_GCOV_TOOL |
37 | /* About the target. */ | |
38 | /* This path will be used by libgcov runtime. */ | |
39 | ||
67745126 | 40 | #include "tconfig.h" |
41 | #include "tsystem.h" | |
42 | #include "coretypes.h" | |
43 | #include "tm.h" | |
44 | #include "libgcc_tm.h" | |
44d47185 | 45 | #include "gcov.h" |
67745126 | 46 | |
d2dc729f | 47 | #if __CHAR_BIT__ == 8 |
67745126 | 48 | typedef unsigned gcov_unsigned_t __attribute__ ((mode (SI))); |
49 | typedef unsigned gcov_position_t __attribute__ ((mode (SI))); | |
50 | #if LONG_LONG_TYPE_SIZE > 32 | |
51 | typedef signed gcov_type __attribute__ ((mode (DI))); | |
52 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (DI))); | |
53 | #else | |
54 | typedef signed gcov_type __attribute__ ((mode (SI))); | |
55 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (SI))); | |
56 | #endif | |
57 | #else | |
d2dc729f | 58 | #if __CHAR_BIT__ == 16 |
67745126 | 59 | typedef unsigned gcov_unsigned_t __attribute__ ((mode (HI))); |
60 | typedef unsigned gcov_position_t __attribute__ ((mode (HI))); | |
61 | #if LONG_LONG_TYPE_SIZE > 32 | |
62 | typedef signed gcov_type __attribute__ ((mode (SI))); | |
63 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (SI))); | |
64 | #else | |
65 | typedef signed gcov_type __attribute__ ((mode (HI))); | |
66 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (HI))); | |
67 | #endif | |
68 | #else | |
69 | typedef unsigned gcov_unsigned_t __attribute__ ((mode (QI))); | |
70 | typedef unsigned gcov_position_t __attribute__ ((mode (QI))); | |
71 | #if LONG_LONG_TYPE_SIZE > 32 | |
72 | typedef signed gcov_type __attribute__ ((mode (HI))); | |
73 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (HI))); | |
74 | #else | |
75 | typedef signed gcov_type __attribute__ ((mode (QI))); | |
76 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (QI))); | |
77 | #endif | |
78 | #endif | |
79 | #endif | |
80 | ||
81 | #if defined (TARGET_POSIX_IO) | |
82 | #define GCOV_LOCKED 1 | |
83 | #else | |
84 | #define GCOV_LOCKED 0 | |
85 | #endif | |
86 | ||
1186f97a | 87 | /* In libgcov we need these functions to be extern, so prefix them with |
88 | __gcov. In libgcov they must also be hidden so that the instance in | |
89 | the executable is not also used in a DSO. */ | |
90 | #define gcov_var __gcov_var | |
91 | #define gcov_open __gcov_open | |
92 | #define gcov_close __gcov_close | |
93 | #define gcov_write_tag_length __gcov_write_tag_length | |
94 | #define gcov_position __gcov_position | |
95 | #define gcov_seek __gcov_seek | |
96 | #define gcov_rewrite __gcov_rewrite | |
97 | #define gcov_is_error __gcov_is_error | |
98 | #define gcov_write_unsigned __gcov_write_unsigned | |
99 | #define gcov_write_counter __gcov_write_counter | |
100 | #define gcov_write_summary __gcov_write_summary | |
101 | #define gcov_read_unsigned __gcov_read_unsigned | |
102 | #define gcov_read_counter __gcov_read_counter | |
103 | #define gcov_read_summary __gcov_read_summary | |
8ceaa1ef | 104 | #define gcov_sort_n_vals __gcov_sort_n_vals |
1186f97a | 105 | |
e76f6040 | 106 | #else /* IN_GCOV_TOOL */ |
107 | /* About the host. */ | |
108 | /* This path will be compiled for the host and linked into | |
109 | gcov-tool binary. */ | |
110 | ||
111 | #include "config.h" | |
112 | #include "system.h" | |
113 | #include "coretypes.h" | |
114 | #include "tm.h" | |
115 | ||
116 | typedef unsigned gcov_unsigned_t; | |
117 | typedef unsigned gcov_position_t; | |
118 | /* gcov_type is typedef'd elsewhere for the compiler */ | |
119 | #if defined (HOST_HAS_F_SETLKW) | |
120 | #define GCOV_LOCKED 1 | |
121 | #else | |
122 | #define GCOV_LOCKED 0 | |
123 | #endif | |
124 | ||
125 | /* Some Macros specific to gcov-tool. */ | |
126 | ||
127 | #define L_gcov 1 | |
128 | #define L_gcov_merge_add 1 | |
129 | #define L_gcov_merge_single 1 | |
e76f6040 | 130 | #define L_gcov_merge_ior 1 |
131 | #define L_gcov_merge_time_profile 1 | |
8ceaa1ef | 132 | #define L_gcov_merge_icall_topn 1 |
e76f6040 | 133 | |
e76f6040 | 134 | extern gcov_type gcov_read_counter_mem (); |
135 | extern unsigned gcov_get_merge_weight (); | |
145d88ea | 136 | extern struct gcov_info *gcov_list; |
e76f6040 | 137 | |
138 | #endif /* !IN_GCOV_TOOL */ | |
139 | ||
67745126 | 140 | #if defined(inhibit_libc) |
141 | #define IN_LIBGCOV (-1) | |
142 | #else | |
143 | #define IN_LIBGCOV 1 | |
144 | #if defined(L_gcov) | |
145 | #define GCOV_LINKAGE /* nothing */ | |
146 | #endif | |
147 | #endif | |
148 | ||
67745126 | 149 | /* Poison these, so they don't accidentally slip in. */ |
150 | #pragma GCC poison gcov_write_string gcov_write_tag gcov_write_length | |
151 | #pragma GCC poison gcov_time gcov_magic | |
152 | ||
153 | #ifdef HAVE_GAS_HIDDEN | |
154 | #define ATTRIBUTE_HIDDEN __attribute__ ((__visibility__ ("hidden"))) | |
155 | #else | |
156 | #define ATTRIBUTE_HIDDEN | |
157 | #endif | |
158 | ||
159 | #include "gcov-io.h" | |
160 | ||
161 | /* Structures embedded in coveraged program. The structures generated | |
162 | by write_profile must match these. */ | |
163 | ||
164 | /* Information about counters for a single function. */ | |
165 | struct gcov_ctr_info | |
166 | { | |
167 | gcov_unsigned_t num; /* number of counters. */ | |
168 | gcov_type *values; /* their values. */ | |
169 | }; | |
170 | ||
171 | /* Information about a single function. This uses the trailing array | |
172 | idiom. The number of counters is determined from the merge pointer | |
173 | array in gcov_info. The key is used to detect which of a set of | |
174 | comdat functions was selected -- it points to the gcov_info object | |
175 | of the object file containing the selected comdat function. */ | |
176 | ||
177 | struct gcov_fn_info | |
178 | { | |
179 | const struct gcov_info *key; /* comdat key */ | |
180 | gcov_unsigned_t ident; /* unique ident of function */ | |
181 | gcov_unsigned_t lineno_checksum; /* function lineo_checksum */ | |
182 | gcov_unsigned_t cfg_checksum; /* function cfg checksum */ | |
3dc22a01 | 183 | struct gcov_ctr_info ctrs[1]; /* instrumented counters */ |
67745126 | 184 | }; |
185 | ||
186 | /* Type of function used to merge counters. */ | |
187 | typedef void (*gcov_merge_fn) (gcov_type *, gcov_unsigned_t); | |
188 | ||
189 | /* Information about a single object file. */ | |
190 | struct gcov_info | |
191 | { | |
192 | gcov_unsigned_t version; /* expected version number */ | |
193 | struct gcov_info *next; /* link to next, used by libgcov */ | |
194 | ||
195 | gcov_unsigned_t stamp; /* uniquifying time stamp */ | |
196 | const char *filename; /* output file name */ | |
197 | ||
198 | gcov_merge_fn merge[GCOV_COUNTERS]; /* merge functions (null for | |
199 | unused) */ | |
200 | ||
201 | unsigned n_functions; /* number of functions */ | |
e76f6040 | 202 | |
203 | #ifndef IN_GCOV_TOOL | |
67745126 | 204 | const struct gcov_fn_info *const *functions; /* pointer to pointers |
e76f6040 | 205 | to function information */ |
206 | #else | |
207 | const struct gcov_fn_info **functions; | |
208 | #endif /* !IN_GCOV_TOOL */ | |
67745126 | 209 | }; |
210 | ||
859fa1a9 | 211 | /* Root of a program/shared-object state */ |
212 | struct gcov_root | |
213 | { | |
214 | struct gcov_info *list; | |
215 | unsigned dumped : 1; /* counts have been dumped. */ | |
216 | unsigned run_counted : 1; /* run has been accounted for. */ | |
bc587267 | 217 | struct gcov_root *next; |
218 | struct gcov_root *prev; | |
859fa1a9 | 219 | }; |
220 | ||
221 | extern struct gcov_root __gcov_root ATTRIBUTE_HIDDEN; | |
222 | ||
bc587267 | 223 | struct gcov_master |
224 | { | |
225 | gcov_unsigned_t version; | |
226 | struct gcov_root *root; | |
227 | }; | |
228 | ||
229 | /* Exactly one of these will be active in the process. */ | |
230 | extern struct gcov_master __gcov_master; | |
231 | ||
859fa1a9 | 232 | /* Dump a set of gcov objects. */ |
233 | extern void __gcov_dump_one (struct gcov_root *) ATTRIBUTE_HIDDEN; | |
234 | ||
67745126 | 235 | /* Register a new object file module. */ |
236 | extern void __gcov_init (struct gcov_info *) ATTRIBUTE_HIDDEN; | |
237 | ||
db46bcd3 | 238 | /* GCOV exit function registered via a static destructor. */ |
239 | extern void __gcov_exit (void) ATTRIBUTE_HIDDEN; | |
240 | ||
b12d2330 | 241 | /* Function to reset all counters to 0. Both externally visible (and |
242 | overridable) and internal version. */ | |
b12d2330 | 243 | extern void __gcov_reset_int (void) ATTRIBUTE_HIDDEN; |
67745126 | 244 | |
bc587267 | 245 | /* User function to enable early write of profile information so far. */ |
bc587267 | 246 | extern void __gcov_dump_int (void) ATTRIBUTE_HIDDEN; |
67745126 | 247 | |
248 | /* The merge function that just sums the counters. */ | |
249 | extern void __gcov_merge_add (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; | |
250 | ||
251 | /* The merge function to select the minimum valid counter value. */ | |
252 | extern void __gcov_merge_time_profile (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; | |
253 | ||
254 | /* The merge function to choose the most common value. */ | |
255 | extern void __gcov_merge_single (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; | |
256 | ||
67745126 | 257 | /* The merge function that just ors the counters together. */ |
258 | extern void __gcov_merge_ior (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; | |
259 | ||
8ceaa1ef | 260 | /* The merge function is used for topn indirect call counters. */ |
261 | extern void __gcov_merge_icall_topn (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; | |
262 | ||
67745126 | 263 | /* The profiler functions. */ |
264 | extern void __gcov_interval_profiler (gcov_type *, gcov_type, int, unsigned); | |
2d2b4107 | 265 | extern void __gcov_interval_profiler_atomic (gcov_type *, gcov_type, int, |
266 | unsigned); | |
67745126 | 267 | extern void __gcov_pow2_profiler (gcov_type *, gcov_type); |
2d2b4107 | 268 | extern void __gcov_pow2_profiler_atomic (gcov_type *, gcov_type); |
67745126 | 269 | extern void __gcov_one_value_profiler (gcov_type *, gcov_type); |
2d2b4107 | 270 | extern void __gcov_one_value_profiler_atomic (gcov_type *, gcov_type); |
67745126 | 271 | extern void __gcov_indirect_call_profiler_v2 (gcov_type, void *); |
272 | extern void __gcov_time_profiler (gcov_type *); | |
2d2b4107 | 273 | extern void __gcov_time_profiler_atomic (gcov_type *); |
67745126 | 274 | extern void __gcov_average_profiler (gcov_type *, gcov_type); |
2d2b4107 | 275 | extern void __gcov_average_profiler_atomic (gcov_type *, gcov_type); |
67745126 | 276 | extern void __gcov_ior_profiler (gcov_type *, gcov_type); |
2d2b4107 | 277 | extern void __gcov_ior_profiler_atomic (gcov_type *, gcov_type); |
8ceaa1ef | 278 | extern void __gcov_indirect_call_topn_profiler (gcov_type, void *); |
279 | extern void gcov_sort_n_vals (gcov_type *, int); | |
67745126 | 280 | |
281 | #ifndef inhibit_libc | |
282 | /* The wrappers around some library functions.. */ | |
283 | extern pid_t __gcov_fork (void) ATTRIBUTE_HIDDEN; | |
284 | extern int __gcov_execl (const char *, char *, ...) ATTRIBUTE_HIDDEN; | |
285 | extern int __gcov_execlp (const char *, char *, ...) ATTRIBUTE_HIDDEN; | |
286 | extern int __gcov_execle (const char *, char *, ...) ATTRIBUTE_HIDDEN; | |
287 | extern int __gcov_execv (const char *, char *const []) ATTRIBUTE_HIDDEN; | |
288 | extern int __gcov_execvp (const char *, char *const []) ATTRIBUTE_HIDDEN; | |
289 | extern int __gcov_execve (const char *, char *const [], char *const []) | |
290 | ATTRIBUTE_HIDDEN; | |
291 | ||
292 | /* Functions that only available in libgcov. */ | |
293 | GCOV_LINKAGE int gcov_open (const char */*name*/) ATTRIBUTE_HIDDEN; | |
294 | GCOV_LINKAGE void gcov_write_counter (gcov_type) ATTRIBUTE_HIDDEN; | |
295 | GCOV_LINKAGE void gcov_write_tag_length (gcov_unsigned_t, gcov_unsigned_t) | |
296 | ATTRIBUTE_HIDDEN; | |
297 | GCOV_LINKAGE void gcov_write_summary (gcov_unsigned_t /*tag*/, | |
298 | const struct gcov_summary *) | |
299 | ATTRIBUTE_HIDDEN; | |
300 | GCOV_LINKAGE void gcov_seek (gcov_position_t /*position*/) ATTRIBUTE_HIDDEN; | |
1186f97a | 301 | GCOV_LINKAGE void gcov_rewrite (void) ATTRIBUTE_HIDDEN; |
67745126 | 302 | |
e76f6040 | 303 | /* "Counts" stored in gcda files can be a real counter value, or |
304 | an target address. When differentiate these two types because | |
305 | when manipulating counts, we should only change real counter values, | |
306 | rather target addresses. */ | |
307 | ||
308 | static inline gcov_type | |
309 | gcov_get_counter (void) | |
310 | { | |
311 | #ifndef IN_GCOV_TOOL | |
312 | /* This version is for reading count values in libgcov runtime: | |
313 | we read from gcda files. */ | |
314 | ||
315 | return gcov_read_counter (); | |
316 | #else | |
317 | /* This version is for gcov-tool. We read the value from memory and | |
318 | multiply it by the merge weight. */ | |
319 | ||
320 | return gcov_read_counter_mem () * gcov_get_merge_weight (); | |
321 | #endif | |
322 | } | |
323 | ||
324 | /* Similar function as gcov_get_counter(), but handles target address | |
325 | counters. */ | |
326 | ||
327 | static inline gcov_type | |
328 | gcov_get_counter_target (void) | |
329 | { | |
330 | #ifndef IN_GCOV_TOOL | |
331 | /* This version is for reading count target values in libgcov runtime: | |
332 | we read from gcda files. */ | |
333 | ||
334 | return gcov_read_counter (); | |
335 | #else | |
336 | /* This version is for gcov-tool. We read the value from memory and we do NOT | |
337 | multiply it by the merge weight. */ | |
338 | ||
339 | return gcov_read_counter_mem (); | |
340 | #endif | |
341 | } | |
342 | ||
67745126 | 343 | #endif /* !inhibit_libc */ |
344 | ||
345 | #endif /* GCC_LIBGCOV_H */ |