/[jscoverage]/trunk/instrument.c
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Contents of /trunk/instrument.c

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Revision 505 - (show annotations)
Sat Jan 2 04:55:54 2010 UTC (8 years, 11 months ago) by siliconforks
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1 /*
2 instrument.c - file and directory instrumentation routines
3 Copyright (C) 2007, 2008, 2009, 2010 siliconforks.com
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #include <config.h>
21
22 #include "instrument.h"
23
24 #include <assert.h>
25 #include <errno.h>
26 #include <string.h>
27
28 #include <dirent.h>
29 #include <sys/stat.h>
30 #include <sys/types.h>
31
32 #include "encoding.h"
33 #include "global.h"
34 #include "instrument-js.h"
35 #include "resource-manager.h"
36 #include "util.h"
37
38 static int g_verbose = 0;
39
40 static int string_ends_with(const char * s, const char * suffix) {
41 size_t length = strlen(s);
42 size_t suffix_length = strlen(suffix);
43 if (length < suffix_length) {
44 return 0;
45 }
46 return strcasecmp(s + (length - suffix_length), suffix) == 0;
47 }
48
49 static enum FileType get_file_type(const char * file) {
50 if (string_ends_with(file, ".js")) {
51 return FILE_TYPE_JS;
52 }
53 else if (string_ends_with(file, ".html") || string_ends_with(file, ".htm")) {
54 return FILE_TYPE_HTML;
55 }
56 else {
57 return FILE_TYPE_OTHER;
58 }
59 }
60
61 static void check_same_file(const char * file1, const char * file2) {
62 if (is_same_file(file1, file2)) {
63 fatal("source and destination are the same");
64 }
65 }
66
67 static void check_contains_file(const char * file1, const char * file2) {
68 if (contains_file(file1, file2)) {
69 fatal("%s contains %s", file1, file2);
70 }
71 }
72
73 static void instrument_file(const char * source_file, const char * destination_file, const char * id, int instrumenting) {
74 if (g_verbose) {
75 printf("Instrumenting file %s\n", id);
76 }
77
78 /* check if they are the same */
79 char * canonical_source_file = make_canonical_path(source_file);
80 char * canonical_destination_file = make_canonical_path(destination_file);
81 check_same_file(canonical_source_file, canonical_destination_file);
82 free(canonical_source_file);
83 free(canonical_destination_file);
84
85 if (instrumenting) {
86 enum FileType file_type = get_file_type(source_file);
87 switch (file_type) {
88 case FILE_TYPE_OTHER:
89 case FILE_TYPE_HTML:
90 copy_file(source_file, destination_file);
91 break;
92 case FILE_TYPE_JS:
93 {
94 FILE * input = xfopen(source_file, "rb");
95 FILE * output = xfopen(destination_file, "wb");
96
97 Stream * input_stream = Stream_new(0);
98 Stream * output_stream = Stream_new(0);
99
100 Stream_write_file_contents(input_stream, input);
101
102 /*
103 Check if the source file looks like an instrumented JavaScript file.
104 */
105 if (input_stream->length >= JSCOVERAGE_INSTRUMENTED_HEADER_LENGTH &&
106 memcmp(input_stream->data, JSCOVERAGE_INSTRUMENTED_HEADER, JSCOVERAGE_INSTRUMENTED_HEADER_LENGTH) == 0) {
107 fatal_command_line("file %s in the source directory appears to be already instrumented", id);
108 }
109
110 size_t num_characters = input_stream->length;
111 uint16_t * characters = NULL;
112 int result = jscoverage_bytes_to_characters(jscoverage_encoding, input_stream->data, input_stream->length, &characters, &num_characters);
113 if (result == JSCOVERAGE_ERROR_ENCODING_NOT_SUPPORTED) {
114 fatal("encoding %s not supported", jscoverage_encoding);
115 }
116 else if (result == JSCOVERAGE_ERROR_INVALID_BYTE_SEQUENCE) {
117 fatal("error decoding %s in file %s", jscoverage_encoding, id);
118 }
119 jscoverage_instrument_js(id, characters, num_characters, output_stream);
120 free(characters);
121
122 if (fwrite(output_stream->data, 1, output_stream->length, output) != output_stream->length) {
123 fatal("cannot write to file: %s", destination_file);
124 }
125
126 Stream_delete(input_stream);
127 Stream_delete(output_stream);
128
129 fclose(input);
130 fclose(output);
131 }
132 break;
133 }
134 }
135 else {
136 copy_file(source_file, destination_file);
137 }
138 }
139
140 void jscoverage_instrument(const char * source,
141 const char * destination,
142 int verbose,
143 char ** exclude,
144 int num_exclude,
145 char ** no_instrument,
146 int num_no_instrument)
147 {
148 assert(source != NULL);
149 assert(destination != NULL);
150
151 g_verbose = verbose;
152
153 /* check if they are the same */
154 check_same_file(source, destination);
155
156 /* check if source directory is an ancestor of destination directory */
157 check_contains_file(source, destination);
158
159 /* check that the source exists and is a directory */
160 struct stat buf;
161 xstat(source, &buf);
162 if (! S_ISDIR(buf.st_mode)) {
163 fatal("not a directory: %s", source);
164 }
165
166 /* if the destination directory exists, check that it is a jscoverage directory */
167 if (stat(destination, &buf) == 0) {
168 /* it exists */
169 if (! S_ISDIR(buf.st_mode)) {
170 fatal("not a directory: %s", destination);
171 }
172 if (! directory_is_empty(destination)) {
173 char * expected_file = NULL;
174 if (jscoverage_mode == JSCOVERAGE_MOZILLA) {
175 char * modules_directory = make_path(destination, "modules");
176 expected_file = make_path(modules_directory, "jscoverage.jsm");
177 free(modules_directory);
178 }
179 else {
180 expected_file = make_path(destination, "jscoverage.html");
181 }
182 if (stat(expected_file, &buf) == -1) {
183 fatal("refusing to overwrite directory: %s", destination);
184 }
185 free(expected_file);
186 }
187 }
188 else if (errno == ENOENT) {
189 xmkdir(destination);
190 }
191 else {
192 fatal("cannot stat directory: %s", destination);
193 }
194
195 /* copy the resources */
196 if (jscoverage_mode == JSCOVERAGE_MOZILLA) {
197 char * chrome_directory = make_path(destination, "chrome");
198 char * jscoverage_chrome_directory = make_path(chrome_directory, "jscoverage");
199 mkdirs(jscoverage_chrome_directory);
200 copy_resource("jscoverage.manifest", chrome_directory);
201 copy_resource("jscoverage.html", jscoverage_chrome_directory);
202 copy_resource("jscoverage.css", jscoverage_chrome_directory);
203 copy_resource("jscoverage.js", jscoverage_chrome_directory);
204 copy_resource("jscoverage-throbber.gif", jscoverage_chrome_directory);
205 copy_resource("jscoverage-highlight.css", jscoverage_chrome_directory);
206 copy_resource("jscoverage.xul", jscoverage_chrome_directory);
207 copy_resource("jscoverage-overlay.js", jscoverage_chrome_directory);
208 free(jscoverage_chrome_directory);
209 free(chrome_directory);
210
211 char * modules_directory = make_path(destination, "modules");
212 mkdirs(modules_directory);
213 copy_resource("jscoverage.jsm", modules_directory);
214 free(modules_directory);
215 }
216 else {
217 jscoverage_copy_resources(destination);
218 }
219
220 /* finally: copy the directory */
221 struct DirListEntry * list = make_recursive_dir_list(source);
222 for (struct DirListEntry * p = list; p != NULL; p = p->next) {
223 char * s = make_path(source, p->name);
224 char * d = make_path(destination, p->name);
225
226 /* check if it's on the exclude list */
227 for (int i = 0; i < num_exclude; i++) {
228 char * x = make_path(source, exclude[i]);
229 if (is_same_file(x, s) || contains_file(x, s)) {
230 free(x);
231 goto cleanup;
232 }
233 free(x);
234 }
235
236 char * dd = make_dirname(d);
237 mkdirs(dd);
238 free(dd);
239
240 int instrument_this = 1;
241
242 /* check if it's on the no-instrument list */
243 for (int i = 0; i < num_no_instrument; i++) {
244 char * ni = make_path(source, no_instrument[i]);
245 if (is_same_file(ni, s) || contains_file(ni, s)) {
246 instrument_this = 0;
247 }
248 free(ni);
249 }
250
251 instrument_file(s, d, p->name, instrument_this);
252
253 cleanup:
254 free(s);
255 free(d);
256 }
257
258 free_dir_list(list);
259 }

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