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d6d3f033 RX |
1 | /* Routines required for instrumenting a program. */ |
2 | /* Compile this one with gcc. */ | |
5624e564 | 3 | /* Copyright (C) 1989-2015 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 | ||
26 | /* A utility function for outputing errors. */ | |
27 | ||
28 | static int __attribute__((format(printf, 1, 2))) | |
29 | gcov_error (const char *fmt, ...) | |
30 | { | |
31 | int ret; | |
32 | va_list argp; | |
33 | va_start (argp, fmt); | |
34 | ret = vfprintf (stderr, fmt, argp); | |
35 | va_end (argp); | |
36 | return ret; | |
37 | } | |
38 | ||
39 | /* Make sure path component of the given FILENAME exists, create | |
40 | missing directories. FILENAME must be writable. | |
41 | Returns zero on success, or -1 if an error occurred. */ | |
42 | ||
43 | static int | |
44 | create_file_directory (char *filename) | |
45 | { | |
46 | #if !defined(TARGET_POSIX_IO) && !defined(_WIN32) | |
47 | (void) filename; | |
48 | return -1; | |
49 | #else | |
50 | char *s; | |
51 | ||
52 | s = filename; | |
53 | ||
54 | if (HAS_DRIVE_SPEC(s)) | |
55 | s += 2; | |
56 | if (IS_DIR_SEPARATOR(*s)) | |
57 | ++s; | |
58 | for (; *s != '\0'; s++) | |
59 | if (IS_DIR_SEPARATOR(*s)) | |
60 | { | |
61 | char sep = *s; | |
62 | *s = '\0'; | |
63 | ||
64 | /* Try to make directory if it doesn't already exist. */ | |
65 | if (access (filename, F_OK) == -1 | |
66 | #ifdef TARGET_POSIX_IO | |
67 | && mkdir (filename, 0755) == -1 | |
68 | #else | |
69 | && mkdir (filename) == -1 | |
70 | #endif | |
71 | /* The directory might have been made by another process. */ | |
72 | && errno != EEXIST) | |
73 | { | |
74 | gcov_error ("profiling:%s:Cannot create directory\n", filename); | |
75 | *s = sep; | |
76 | return -1; | |
77 | }; | |
78 | ||
79 | *s = sep; | |
80 | }; | |
81 | return 0; | |
82 | #endif | |
83 | } | |
84 | ||
85 | static void | |
6dc33097 | 86 | allocate_filename_struct (struct gcov_filename *gf) |
d6d3f033 RX |
87 | { |
88 | const char *gcov_prefix; | |
d6d3f033 | 89 | size_t prefix_length; |
6dc33097 | 90 | int strip = 0; |
d6d3f033 | 91 | |
d6d3f033 RX |
92 | { |
93 | /* Check if the level of dirs to strip off specified. */ | |
94 | char *tmp = getenv("GCOV_PREFIX_STRIP"); | |
95 | if (tmp) | |
96 | { | |
6dc33097 | 97 | strip = atoi (tmp); |
d6d3f033 | 98 | /* Do not consider negative values. */ |
6dc33097 NS |
99 | if (strip < 0) |
100 | strip = 0; | |
d6d3f033 RX |
101 | } |
102 | } | |
6dc33097 | 103 | gf->strip = strip; |
d6d3f033 RX |
104 | |
105 | /* Get file name relocation prefix. Non-absolute values are ignored. */ | |
106 | gcov_prefix = getenv("GCOV_PREFIX"); | |
6dc33097 NS |
107 | prefix_length = gcov_prefix ? strlen (gcov_prefix) : 0; |
108 | ||
109 | /* Remove an unnecessary trailing '/' */ | |
110 | if (prefix_length && IS_DIR_SEPARATOR (gcov_prefix[prefix_length - 1])) | |
111 | prefix_length--; | |
d6d3f033 RX |
112 | |
113 | /* If no prefix was specified and a prefix stip, then we assume | |
114 | relative. */ | |
6dc33097 | 115 | if (!prefix_length && gf->strip) |
d6d3f033 RX |
116 | { |
117 | gcov_prefix = "."; | |
118 | prefix_length = 1; | |
119 | } | |
6dc33097 | 120 | gf->prefix = prefix_length; |
d6d3f033 | 121 | |
6dc33097 NS |
122 | /* Allocate and initialize the filename scratch space. */ |
123 | gf->filename = (char *) xmalloc (gf->max_length + prefix_length + 2); | |
124 | if (prefix_length) | |
125 | memcpy (gf->filename, gcov_prefix, prefix_length); | |
d6d3f033 RX |
126 | } |
127 | ||
128 | /* Open a gcda file specified by GI_FILENAME. | |
129 | Return -1 on error. Return 0 on success. */ | |
130 | ||
131 | static int | |
6dc33097 NS |
132 | gcov_exit_open_gcda_file (struct gcov_info *gi_ptr, |
133 | struct gcov_filename *gf) | |
d6d3f033 | 134 | { |
6dc33097 NS |
135 | const char *fname = gi_ptr->filename; |
136 | char *dst = gf->filename + gf->prefix; | |
d6d3f033 | 137 | |
d6d3f033 RX |
138 | fname = gi_ptr->filename; |
139 | ||
d6d3f033 RX |
140 | /* Build relocated filename, stripping off leading |
141 | directories from the initial filename if requested. */ | |
6dc33097 | 142 | if (gf->strip > 0) |
d6d3f033 | 143 | { |
6dc33097 NS |
144 | const char *probe = fname; |
145 | int level; | |
d6d3f033 | 146 | |
6dc33097 NS |
147 | /* Remove a leading separator, without counting it. */ |
148 | if (IS_DIR_SEPARATOR (*probe)) | |
149 | probe++; | |
d6d3f033 | 150 | |
6dc33097 NS |
151 | /* Skip selected directory levels. If we fall off the end, we |
152 | keep the final part. */ | |
153 | for (level = gf->strip; *probe && level; probe++) | |
154 | if (IS_DIR_SEPARATOR (*probe)) | |
d6d3f033 | 155 | { |
6dc33097 NS |
156 | fname = probe; |
157 | level--; | |
d6d3f033 RX |
158 | } |
159 | } | |
160 | ||
161 | /* Update complete filename with stripped original. */ | |
6dc33097 | 162 | if (gf->prefix) |
d6d3f033 | 163 | { |
6dc33097 NS |
164 | /* Avoid to add multiple drive letters into combined path. */ |
165 | if (HAS_DRIVE_SPEC(fname)) | |
166 | fname += 2; | |
167 | ||
168 | if (!IS_DIR_SEPARATOR (*fname)) | |
169 | *dst++ = '/'; | |
d6d3f033 | 170 | } |
6dc33097 | 171 | strcpy (dst, fname); |
d6d3f033 | 172 | |
6dc33097 | 173 | if (!gcov_open (gf->filename)) |
d6d3f033 RX |
174 | { |
175 | /* Open failed likely due to missed directory. | |
176 | Create directory and retry to open file. */ | |
6dc33097 | 177 | if (create_file_directory (gf->filename)) |
d6d3f033 | 178 | { |
6dc33097 | 179 | fprintf (stderr, "profiling:%s:Skip\n", gf->filename); |
d6d3f033 RX |
180 | return -1; |
181 | } | |
6dc33097 | 182 | if (!gcov_open (gf->filename)) |
d6d3f033 | 183 | { |
6dc33097 | 184 | fprintf (stderr, "profiling:%s:Cannot open\n", gf->filename); |
d6d3f033 RX |
185 | return -1; |
186 | } | |
187 | } | |
188 | ||
189 | return 0; | |
190 | } |