gcc/
[official-gcc.git] / libgcc / libgcov-driver-system.c
blob2f59f800262ebcf123f48c43e116687491505b0b
1 /* Routines required for instrumenting a program. */
2 /* Compile this one with gcc. */
3 /* Copyright (C) 1989-2014 Free Software Foundation, Inc.
5 This file is part of GCC.
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.
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.
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.
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/>. */
26 /* A utility function for outputing errors. */
28 static int __attribute__((format(printf, 1, 2)))
29 gcov_error (const char *fmt, ...)
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;
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. */
43 static int
44 create_file_directory (char *filename)
46 #if !defined(TARGET_POSIX_IO) && !defined(_WIN32)
47 (void) filename;
48 return -1;
49 #else
50 char *s;
52 s = filename;
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))
61 char sep = *s;
62 *s = '\0';
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)
74 gcov_error ("profiling:%s:Cannot create directory\n", filename);
75 *s = sep;
76 return -1;
79 *s = sep;
81 return 0;
82 #endif
85 static void
86 allocate_filename_struct (struct gcov_filename *gf)
88 const char *gcov_prefix;
89 size_t prefix_length;
90 int strip = 0;
93 /* Check if the level of dirs to strip off specified. */
94 char *tmp = getenv("GCOV_PREFIX_STRIP");
95 if (tmp)
97 strip = atoi (tmp);
98 /* Do not consider negative values. */
99 if (strip < 0)
100 strip = 0;
103 gf->strip = strip;
105 /* Get file name relocation prefix. Non-absolute values are ignored. */
106 gcov_prefix = getenv("GCOV_PREFIX");
107 prefix_length = gcov_prefix ? strlen (gcov_prefix) : 0;
109 /* Remove an unnecessary trailing '/' */
110 if (prefix_length && IS_DIR_SEPARATOR (gcov_prefix[prefix_length - 1]))
111 prefix_length--;
113 /* If no prefix was specified and a prefix stip, then we assume
114 relative. */
115 if (!prefix_length && gf->strip)
117 gcov_prefix = ".";
118 prefix_length = 1;
120 gf->prefix = prefix_length;
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);
128 /* Open a gcda file specified by GI_FILENAME.
129 Return -1 on error. Return 0 on success. */
131 static int
132 gcov_exit_open_gcda_file (struct gcov_info *gi_ptr,
133 struct gcov_filename *gf)
135 const char *fname = gi_ptr->filename;
136 char *dst = gf->filename + gf->prefix;
138 fname = gi_ptr->filename;
140 /* Build relocated filename, stripping off leading
141 directories from the initial filename if requested. */
142 if (gf->strip > 0)
144 const char *probe = fname;
145 int level;
147 /* Remove a leading separator, without counting it. */
148 if (IS_DIR_SEPARATOR (*probe))
149 probe++;
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))
156 fname = probe;
157 level--;
161 /* Update complete filename with stripped original. */
162 if (gf->prefix)
164 /* Avoid to add multiple drive letters into combined path. */
165 if (HAS_DRIVE_SPEC(fname))
166 fname += 2;
168 if (!IS_DIR_SEPARATOR (*fname))
169 *dst++ = '/';
171 strcpy (dst, fname);
173 if (!gcov_open (gf->filename))
175 /* Open failed likely due to missed directory.
176 Create directory and retry to open file. */
177 if (create_file_directory (gf->filename))
179 fprintf (stderr, "profiling:%s:Skip\n", gf->filename);
180 return -1;
182 if (!gcov_open (gf->filename))
184 fprintf (stderr, "profiling:%s:Cannot open\n", gf->filename);
185 return -1;
189 return 0;