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67745126 | 1 | /* Header file for libgcov-*.c. |
2 | Copyright (C) 1996-2014 Free Software Foundation, Inc. | |
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" | |
45 | ||
46 | #if BITS_PER_UNIT == 8 | |
47 | typedef unsigned gcov_unsigned_t __attribute__ ((mode (SI))); | |
48 | typedef unsigned gcov_position_t __attribute__ ((mode (SI))); | |
49 | #if LONG_LONG_TYPE_SIZE > 32 | |
50 | typedef signed gcov_type __attribute__ ((mode (DI))); | |
51 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (DI))); | |
52 | #else | |
53 | typedef signed gcov_type __attribute__ ((mode (SI))); | |
54 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (SI))); | |
55 | #endif | |
56 | #else | |
57 | #if BITS_PER_UNIT == 16 | |
58 | typedef unsigned gcov_unsigned_t __attribute__ ((mode (HI))); | |
59 | typedef unsigned gcov_position_t __attribute__ ((mode (HI))); | |
60 | #if LONG_LONG_TYPE_SIZE > 32 | |
61 | typedef signed gcov_type __attribute__ ((mode (SI))); | |
62 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (SI))); | |
63 | #else | |
64 | typedef signed gcov_type __attribute__ ((mode (HI))); | |
65 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (HI))); | |
66 | #endif | |
67 | #else | |
68 | typedef unsigned gcov_unsigned_t __attribute__ ((mode (QI))); | |
69 | typedef unsigned gcov_position_t __attribute__ ((mode (QI))); | |
70 | #if LONG_LONG_TYPE_SIZE > 32 | |
71 | typedef signed gcov_type __attribute__ ((mode (HI))); | |
72 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (HI))); | |
73 | #else | |
74 | typedef signed gcov_type __attribute__ ((mode (QI))); | |
75 | typedef unsigned gcov_type_unsigned __attribute__ ((mode (QI))); | |
76 | #endif | |
77 | #endif | |
78 | #endif | |
79 | ||
80 | #if defined (TARGET_POSIX_IO) | |
81 | #define GCOV_LOCKED 1 | |
82 | #else | |
83 | #define GCOV_LOCKED 0 | |
84 | #endif | |
85 | ||
e76f6040 | 86 | #else /* IN_GCOV_TOOL */ |
87 | /* About the host. */ | |
88 | /* This path will be compiled for the host and linked into | |
89 | gcov-tool binary. */ | |
90 | ||
91 | #include "config.h" | |
92 | #include "system.h" | |
93 | #include "coretypes.h" | |
94 | #include "tm.h" | |
95 | ||
96 | typedef unsigned gcov_unsigned_t; | |
97 | typedef unsigned gcov_position_t; | |
98 | /* gcov_type is typedef'd elsewhere for the compiler */ | |
99 | #if defined (HOST_HAS_F_SETLKW) | |
100 | #define GCOV_LOCKED 1 | |
101 | #else | |
102 | #define GCOV_LOCKED 0 | |
103 | #endif | |
104 | ||
105 | /* Some Macros specific to gcov-tool. */ | |
106 | ||
107 | #define L_gcov 1 | |
108 | #define L_gcov_merge_add 1 | |
109 | #define L_gcov_merge_single 1 | |
110 | #define L_gcov_merge_delta 1 | |
111 | #define L_gcov_merge_ior 1 | |
112 | #define L_gcov_merge_time_profile 1 | |
113 | ||
114 | /* Make certian internal functions/variables in libgcov available for | |
115 | gcov-tool access. */ | |
116 | #define GCOV_TOOL_LINKAGE | |
117 | ||
118 | extern gcov_type gcov_read_counter_mem (); | |
119 | extern unsigned gcov_get_merge_weight (); | |
120 | ||
121 | #endif /* !IN_GCOV_TOOL */ | |
122 | ||
67745126 | 123 | #if defined(inhibit_libc) |
124 | #define IN_LIBGCOV (-1) | |
125 | #else | |
126 | #define IN_LIBGCOV 1 | |
127 | #if defined(L_gcov) | |
128 | #define GCOV_LINKAGE /* nothing */ | |
129 | #endif | |
130 | #endif | |
131 | ||
132 | /* In libgcov we need these functions to be extern, so prefix them with | |
133 | __gcov. In libgcov they must also be hidden so that the instance in | |
134 | the executable is not also used in a DSO. */ | |
135 | #define gcov_var __gcov_var | |
136 | #define gcov_open __gcov_open | |
137 | #define gcov_close __gcov_close | |
138 | #define gcov_write_tag_length __gcov_write_tag_length | |
139 | #define gcov_position __gcov_position | |
140 | #define gcov_seek __gcov_seek | |
141 | #define gcov_rewrite __gcov_rewrite | |
142 | #define gcov_is_error __gcov_is_error | |
143 | #define gcov_write_unsigned __gcov_write_unsigned | |
144 | #define gcov_write_counter __gcov_write_counter | |
145 | #define gcov_write_summary __gcov_write_summary | |
146 | #define gcov_read_unsigned __gcov_read_unsigned | |
147 | #define gcov_read_counter __gcov_read_counter | |
148 | #define gcov_read_summary __gcov_read_summary | |
149 | ||
150 | /* Poison these, so they don't accidentally slip in. */ | |
151 | #pragma GCC poison gcov_write_string gcov_write_tag gcov_write_length | |
152 | #pragma GCC poison gcov_time gcov_magic | |
153 | ||
154 | #ifdef HAVE_GAS_HIDDEN | |
155 | #define ATTRIBUTE_HIDDEN __attribute__ ((__visibility__ ("hidden"))) | |
156 | #else | |
157 | #define ATTRIBUTE_HIDDEN | |
158 | #endif | |
159 | ||
160 | #include "gcov-io.h" | |
161 | ||
162 | /* Structures embedded in coveraged program. The structures generated | |
163 | by write_profile must match these. */ | |
164 | ||
165 | /* Information about counters for a single function. */ | |
166 | struct gcov_ctr_info | |
167 | { | |
168 | gcov_unsigned_t num; /* number of counters. */ | |
169 | gcov_type *values; /* their values. */ | |
170 | }; | |
171 | ||
172 | /* Information about a single function. This uses the trailing array | |
173 | idiom. The number of counters is determined from the merge pointer | |
174 | array in gcov_info. The key is used to detect which of a set of | |
175 | comdat functions was selected -- it points to the gcov_info object | |
176 | of the object file containing the selected comdat function. */ | |
177 | ||
178 | struct gcov_fn_info | |
179 | { | |
180 | const struct gcov_info *key; /* comdat key */ | |
181 | gcov_unsigned_t ident; /* unique ident of function */ | |
182 | gcov_unsigned_t lineno_checksum; /* function lineo_checksum */ | |
183 | gcov_unsigned_t cfg_checksum; /* function cfg checksum */ | |
184 | struct gcov_ctr_info ctrs[0]; /* instrumented counters */ | |
185 | }; | |
186 | ||
187 | /* Type of function used to merge counters. */ | |
188 | typedef void (*gcov_merge_fn) (gcov_type *, gcov_unsigned_t); | |
189 | ||
190 | /* Information about a single object file. */ | |
191 | struct gcov_info | |
192 | { | |
193 | gcov_unsigned_t version; /* expected version number */ | |
194 | struct gcov_info *next; /* link to next, used by libgcov */ | |
195 | ||
196 | gcov_unsigned_t stamp; /* uniquifying time stamp */ | |
197 | const char *filename; /* output file name */ | |
198 | ||
199 | gcov_merge_fn merge[GCOV_COUNTERS]; /* merge functions (null for | |
200 | unused) */ | |
201 | ||
202 | unsigned n_functions; /* number of functions */ | |
e76f6040 | 203 | |
204 | #ifndef IN_GCOV_TOOL | |
67745126 | 205 | const struct gcov_fn_info *const *functions; /* pointer to pointers |
e76f6040 | 206 | to function information */ |
207 | #else | |
208 | const struct gcov_fn_info **functions; | |
209 | #endif /* !IN_GCOV_TOOL */ | |
67745126 | 210 | }; |
211 | ||
212 | /* Register a new object file module. */ | |
213 | extern void __gcov_init (struct gcov_info *) ATTRIBUTE_HIDDEN; | |
214 | ||
215 | /* Called before fork, to avoid double counting. */ | |
216 | extern void __gcov_flush (void) ATTRIBUTE_HIDDEN; | |
217 | ||
218 | /* Function to reset all counters to 0. */ | |
219 | extern void __gcov_reset (void); | |
220 | ||
221 | /* Function to enable early write of profile information so far. */ | |
222 | extern void __gcov_dump (void); | |
223 | ||
224 | /* The merge function that just sums the counters. */ | |
225 | extern void __gcov_merge_add (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; | |
226 | ||
227 | /* The merge function to select the minimum valid counter value. */ | |
228 | extern void __gcov_merge_time_profile (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; | |
229 | ||
230 | /* The merge function to choose the most common value. */ | |
231 | extern void __gcov_merge_single (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; | |
232 | ||
233 | /* The merge function to choose the most common difference between | |
234 | consecutive values. */ | |
235 | extern void __gcov_merge_delta (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; | |
236 | ||
237 | /* The merge function that just ors the counters together. */ | |
238 | extern void __gcov_merge_ior (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; | |
239 | ||
240 | /* The profiler functions. */ | |
241 | extern void __gcov_interval_profiler (gcov_type *, gcov_type, int, unsigned); | |
242 | extern void __gcov_pow2_profiler (gcov_type *, gcov_type); | |
243 | extern void __gcov_one_value_profiler (gcov_type *, gcov_type); | |
244 | extern void __gcov_indirect_call_profiler (gcov_type*, gcov_type, | |
245 | void*, void*); | |
246 | extern void __gcov_indirect_call_profiler_v2 (gcov_type, void *); | |
247 | extern void __gcov_time_profiler (gcov_type *); | |
248 | extern void __gcov_average_profiler (gcov_type *, gcov_type); | |
249 | extern void __gcov_ior_profiler (gcov_type *, gcov_type); | |
250 | ||
251 | #ifndef inhibit_libc | |
252 | /* The wrappers around some library functions.. */ | |
253 | extern pid_t __gcov_fork (void) ATTRIBUTE_HIDDEN; | |
254 | extern int __gcov_execl (const char *, char *, ...) ATTRIBUTE_HIDDEN; | |
255 | extern int __gcov_execlp (const char *, char *, ...) ATTRIBUTE_HIDDEN; | |
256 | extern int __gcov_execle (const char *, char *, ...) ATTRIBUTE_HIDDEN; | |
257 | extern int __gcov_execv (const char *, char *const []) ATTRIBUTE_HIDDEN; | |
258 | extern int __gcov_execvp (const char *, char *const []) ATTRIBUTE_HIDDEN; | |
259 | extern int __gcov_execve (const char *, char *const [], char *const []) | |
260 | ATTRIBUTE_HIDDEN; | |
261 | ||
262 | /* Functions that only available in libgcov. */ | |
263 | GCOV_LINKAGE int gcov_open (const char */*name*/) ATTRIBUTE_HIDDEN; | |
264 | GCOV_LINKAGE void gcov_write_counter (gcov_type) ATTRIBUTE_HIDDEN; | |
265 | GCOV_LINKAGE void gcov_write_tag_length (gcov_unsigned_t, gcov_unsigned_t) | |
266 | ATTRIBUTE_HIDDEN; | |
267 | GCOV_LINKAGE void gcov_write_summary (gcov_unsigned_t /*tag*/, | |
268 | const struct gcov_summary *) | |
269 | ATTRIBUTE_HIDDEN; | |
270 | GCOV_LINKAGE void gcov_seek (gcov_position_t /*position*/) ATTRIBUTE_HIDDEN; | |
271 | GCOV_LINKAGE inline void gcov_rewrite (void); | |
272 | ||
e76f6040 | 273 | /* "Counts" stored in gcda files can be a real counter value, or |
274 | an target address. When differentiate these two types because | |
275 | when manipulating counts, we should only change real counter values, | |
276 | rather target addresses. */ | |
277 | ||
278 | static inline gcov_type | |
279 | gcov_get_counter (void) | |
280 | { | |
281 | #ifndef IN_GCOV_TOOL | |
282 | /* This version is for reading count values in libgcov runtime: | |
283 | we read from gcda files. */ | |
284 | ||
285 | return gcov_read_counter (); | |
286 | #else | |
287 | /* This version is for gcov-tool. We read the value from memory and | |
288 | multiply it by the merge weight. */ | |
289 | ||
290 | return gcov_read_counter_mem () * gcov_get_merge_weight (); | |
291 | #endif | |
292 | } | |
293 | ||
294 | /* Similar function as gcov_get_counter(), but handles target address | |
295 | counters. */ | |
296 | ||
297 | static inline gcov_type | |
298 | gcov_get_counter_target (void) | |
299 | { | |
300 | #ifndef IN_GCOV_TOOL | |
301 | /* This version is for reading count target values in libgcov runtime: | |
302 | we read from gcda files. */ | |
303 | ||
304 | return gcov_read_counter (); | |
305 | #else | |
306 | /* This version is for gcov-tool. We read the value from memory and we do NOT | |
307 | multiply it by the merge weight. */ | |
308 | ||
309 | return gcov_read_counter_mem (); | |
310 | #endif | |
311 | } | |
312 | ||
67745126 | 313 | #endif /* !inhibit_libc */ |
314 | ||
315 | #endif /* GCC_LIBGCOV_H */ |