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d6d3f033 RX |
1 | /* Routines required for instrumenting a program. */ |
2 | /* Compile this one with gcc. */ | |
85ec4feb | 3 | /* Copyright (C) 1989-2018 Free Software Foundation, Inc. |
d6d3f033 RX |
4 | |
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 3, or (at your option) any later | |
10 | version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | Under Section 7 of GPL version 3, you are granted additional | |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
25 | ||
0a0ec53d | 26 | #if !IN_GCOV_TOOL |
8aa5bdd6 AC |
27 | /* Configured via the GCOV_ERROR_FILE environment variable; |
28 | it will either be stderr, or a file of the user's choosing. | |
29 | Non-static to prevent multiple gcov-aware shared objects from | |
30 | instantiating their own copies. */ | |
31 | FILE *__gcov_error_file = NULL; | |
0a0ec53d | 32 | #endif |
8aa5bdd6 AC |
33 | |
34 | /* A utility function to populate the __gcov_error_file pointer. | |
35 | This should NOT be called outside of the gcov system driver code. */ | |
36 | ||
37 | static FILE * | |
0a0ec53d | 38 | get_gcov_error_file (void) |
8aa5bdd6 | 39 | { |
0a0ec53d | 40 | #if IN_GCOV_TOOL |
8aa5bdd6 AC |
41 | return stderr; |
42 | #else | |
0a0ec53d | 43 | if (!__gcov_error_file) |
8aa5bdd6 | 44 | { |
0a0ec53d AC |
45 | const char *gcov_error_filename = getenv ("GCOV_ERROR_FILE"); |
46 | ||
47 | if (gcov_error_filename) | |
48 | __gcov_error_file = fopen (gcov_error_filename, "a"); | |
49 | if (!__gcov_error_file) | |
50 | __gcov_error_file = stderr; | |
8aa5bdd6 | 51 | } |
8aa5bdd6 AC |
52 | return __gcov_error_file; |
53 | #endif | |
54 | } | |
55 | ||
56 | /* A utility function for outputting errors. */ | |
d6d3f033 RX |
57 | |
58 | static int __attribute__((format(printf, 1, 2))) | |
59 | gcov_error (const char *fmt, ...) | |
60 | { | |
61 | int ret; | |
62 | va_list argp; | |
8aa5bdd6 | 63 | |
d6d3f033 | 64 | va_start (argp, fmt); |
0e8f29da ML |
65 | FILE *f = get_gcov_error_file (); |
66 | ret = vfprintf (f, fmt, argp); | |
d6d3f033 | 67 | va_end (argp); |
0e8f29da ML |
68 | |
69 | if (getenv ("GCOV_EXIT_AT_ERROR")) | |
70 | { | |
71 | fprintf (f, "profiling:exiting after an error\n"); | |
72 | exit (1); | |
73 | } | |
74 | ||
d6d3f033 RX |
75 | return ret; |
76 | } | |
77 | ||
8aa5bdd6 AC |
78 | #if !IN_GCOV_TOOL |
79 | static void | |
80 | gcov_error_exit (void) | |
81 | { | |
82 | if (__gcov_error_file && __gcov_error_file != stderr) | |
83 | { | |
84 | fclose (__gcov_error_file); | |
85 | __gcov_error_file = NULL; | |
86 | } | |
87 | } | |
88 | #endif | |
89 | ||
d6d3f033 RX |
90 | /* Make sure path component of the given FILENAME exists, create |
91 | missing directories. FILENAME must be writable. | |
92 | Returns zero on success, or -1 if an error occurred. */ | |
93 | ||
94 | static int | |
95 | create_file_directory (char *filename) | |
96 | { | |
97 | #if !defined(TARGET_POSIX_IO) && !defined(_WIN32) | |
98 | (void) filename; | |
99 | return -1; | |
100 | #else | |
101 | char *s; | |
102 | ||
103 | s = filename; | |
104 | ||
105 | if (HAS_DRIVE_SPEC(s)) | |
106 | s += 2; | |
107 | if (IS_DIR_SEPARATOR(*s)) | |
108 | ++s; | |
109 | for (; *s != '\0'; s++) | |
110 | if (IS_DIR_SEPARATOR(*s)) | |
111 | { | |
112 | char sep = *s; | |
113 | *s = '\0'; | |
114 | ||
115 | /* Try to make directory if it doesn't already exist. */ | |
116 | if (access (filename, F_OK) == -1 | |
117 | #ifdef TARGET_POSIX_IO | |
118 | && mkdir (filename, 0755) == -1 | |
119 | #else | |
98174188 RE |
120 | #ifdef mkdir |
121 | #undef mkdir | |
122 | #endif | |
d6d3f033 RX |
123 | && mkdir (filename) == -1 |
124 | #endif | |
125 | /* The directory might have been made by another process. */ | |
126 | && errno != EEXIST) | |
127 | { | |
128 | gcov_error ("profiling:%s:Cannot create directory\n", filename); | |
129 | *s = sep; | |
130 | return -1; | |
131 | }; | |
132 | ||
133 | *s = sep; | |
134 | }; | |
135 | return 0; | |
136 | #endif | |
137 | } | |
138 | ||
139 | static void | |
6dc33097 | 140 | allocate_filename_struct (struct gcov_filename *gf) |
d6d3f033 RX |
141 | { |
142 | const char *gcov_prefix; | |
d6d3f033 | 143 | size_t prefix_length; |
6dc33097 | 144 | int strip = 0; |
d6d3f033 | 145 | |
d6d3f033 RX |
146 | { |
147 | /* Check if the level of dirs to strip off specified. */ | |
148 | char *tmp = getenv("GCOV_PREFIX_STRIP"); | |
149 | if (tmp) | |
150 | { | |
6dc33097 | 151 | strip = atoi (tmp); |
d6d3f033 | 152 | /* Do not consider negative values. */ |
6dc33097 NS |
153 | if (strip < 0) |
154 | strip = 0; | |
d6d3f033 RX |
155 | } |
156 | } | |
6dc33097 | 157 | gf->strip = strip; |
d6d3f033 RX |
158 | |
159 | /* Get file name relocation prefix. Non-absolute values are ignored. */ | |
160 | gcov_prefix = getenv("GCOV_PREFIX"); | |
6dc33097 NS |
161 | prefix_length = gcov_prefix ? strlen (gcov_prefix) : 0; |
162 | ||
163 | /* Remove an unnecessary trailing '/' */ | |
164 | if (prefix_length && IS_DIR_SEPARATOR (gcov_prefix[prefix_length - 1])) | |
165 | prefix_length--; | |
d6d3f033 RX |
166 | |
167 | /* If no prefix was specified and a prefix stip, then we assume | |
168 | relative. */ | |
6dc33097 | 169 | if (!prefix_length && gf->strip) |
d6d3f033 RX |
170 | { |
171 | gcov_prefix = "."; | |
172 | prefix_length = 1; | |
173 | } | |
6dc33097 | 174 | gf->prefix = prefix_length; |
d6d3f033 | 175 | |
6dc33097 NS |
176 | /* Allocate and initialize the filename scratch space. */ |
177 | gf->filename = (char *) xmalloc (gf->max_length + prefix_length + 2); | |
178 | if (prefix_length) | |
179 | memcpy (gf->filename, gcov_prefix, prefix_length); | |
d6d3f033 RX |
180 | } |
181 | ||
182 | /* Open a gcda file specified by GI_FILENAME. | |
183 | Return -1 on error. Return 0 on success. */ | |
184 | ||
185 | static int | |
6dc33097 NS |
186 | gcov_exit_open_gcda_file (struct gcov_info *gi_ptr, |
187 | struct gcov_filename *gf) | |
d6d3f033 | 188 | { |
6dc33097 NS |
189 | const char *fname = gi_ptr->filename; |
190 | char *dst = gf->filename + gf->prefix; | |
d6d3f033 | 191 | |
d6d3f033 RX |
192 | fname = gi_ptr->filename; |
193 | ||
d6d3f033 RX |
194 | /* Build relocated filename, stripping off leading |
195 | directories from the initial filename if requested. */ | |
6dc33097 | 196 | if (gf->strip > 0) |
d6d3f033 | 197 | { |
6dc33097 NS |
198 | const char *probe = fname; |
199 | int level; | |
d6d3f033 | 200 | |
6dc33097 NS |
201 | /* Remove a leading separator, without counting it. */ |
202 | if (IS_DIR_SEPARATOR (*probe)) | |
203 | probe++; | |
d6d3f033 | 204 | |
6dc33097 NS |
205 | /* Skip selected directory levels. If we fall off the end, we |
206 | keep the final part. */ | |
207 | for (level = gf->strip; *probe && level; probe++) | |
208 | if (IS_DIR_SEPARATOR (*probe)) | |
d6d3f033 | 209 | { |
6dc33097 NS |
210 | fname = probe; |
211 | level--; | |
d6d3f033 RX |
212 | } |
213 | } | |
214 | ||
215 | /* Update complete filename with stripped original. */ | |
6dc33097 | 216 | if (gf->prefix) |
d6d3f033 | 217 | { |
6dc33097 NS |
218 | /* Avoid to add multiple drive letters into combined path. */ |
219 | if (HAS_DRIVE_SPEC(fname)) | |
220 | fname += 2; | |
221 | ||
222 | if (!IS_DIR_SEPARATOR (*fname)) | |
223 | *dst++ = '/'; | |
d6d3f033 | 224 | } |
6dc33097 | 225 | strcpy (dst, fname); |
d6d3f033 | 226 | |
6dc33097 | 227 | if (!gcov_open (gf->filename)) |
d6d3f033 RX |
228 | { |
229 | /* Open failed likely due to missed directory. | |
230 | Create directory and retry to open file. */ | |
6dc33097 | 231 | if (create_file_directory (gf->filename)) |
d6d3f033 | 232 | { |
6dc33097 | 233 | fprintf (stderr, "profiling:%s:Skip\n", gf->filename); |
d6d3f033 RX |
234 | return -1; |
235 | } | |
6dc33097 | 236 | if (!gcov_open (gf->filename)) |
d6d3f033 | 237 | { |
6dc33097 | 238 | fprintf (stderr, "profiling:%s:Cannot open\n", gf->filename); |
d6d3f033 RX |
239 | return -1; |
240 | } | |
241 | } | |
242 | ||
243 | return 0; | |
244 | } |