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1 | /* |
2 | * ========== Copyright Header Begin ========================================== | |
3 | * | |
4 | * Hypervisor Software File: xref_support.c | |
5 | * | |
6 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. | |
7 | * | |
8 | * - Do no alter or remove copyright notices | |
9 | * | |
10 | * - Redistribution and use of this software in source and binary forms, with | |
11 | * or without modification, are permitted provided that the following | |
12 | * conditions are met: | |
13 | * | |
14 | * - Redistribution of source code must retain the above copyright notice, | |
15 | * this list of conditions and the following disclaimer. | |
16 | * | |
17 | * - Redistribution in binary form must reproduce the above copyright notice, | |
18 | * this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * | |
21 | * Neither the name of Sun Microsystems, Inc. or the names of contributors | |
22 | * may be used to endorse or promote products derived from this software | |
23 | * without specific prior written permission. | |
24 | * | |
25 | * This software is provided "AS IS," without a warranty of any kind. | |
26 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, | |
27 | * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A | |
28 | * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN | |
29 | * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR | |
30 | * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR | |
31 | * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN | |
32 | * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR | |
33 | * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE | |
34 | * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, | |
35 | * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF | |
36 | * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. | |
37 | * | |
38 | * You acknowledge that this software is not designed, licensed or | |
39 | * intended for use in the design, construction, operation or maintenance of | |
40 | * any nuclear facility. | |
41 | * | |
42 | * ========== Copyright Header End ============================================ | |
43 | */ | |
44 | /* | |
45 | * @(#)xref_support.c 1.2 03/08/20 | |
46 | * Copyright 2001-2003 Sun Microsystems, Inc. All Rights Reserved | |
47 | * Use is subject to license terms. | |
48 | */ | |
49 | #include <stdio.h> | |
50 | #include <stdlib.h> | |
51 | #include <unistd.h> | |
52 | #include <string.h> | |
53 | ||
54 | #include "xref_support.h" | |
55 | ||
56 | #define ASSERT(x, y) \ | |
57 | if (x); else fprintf(stderr, "%s:%d: %s\n", __FILE__, __LINE__, y) | |
58 | ||
59 | /* | |
60 | * The public statefull part of the cross referencer lives here | |
61 | */ | |
62 | static xref_state_t *xref_state; | |
63 | static int xref_inited = 0; | |
64 | static char *xref_file = NULL; | |
65 | static int xref_level = 0; | |
66 | ||
67 | void | |
68 | push_file_reference(xref_file_t *ref) | |
69 | { | |
70 | ASSERT((ref != NULL), "Pushed a NULL file??\n"); | |
71 | ref->prev_file = xref_state->current_file; | |
72 | xref_state->current_file = ref; | |
73 | } | |
74 | ||
75 | void | |
76 | pop_file_reference(xref_file_t *ref) | |
77 | { | |
78 | ASSERT((ref != NULL), "Popped a NULL file??\n"); | |
79 | xref_state->current_file = ref->prev_file; | |
80 | ref->prev_file = NULL; | |
81 | } | |
82 | ||
83 | /* | |
84 | * We just touched a new file, so we need to create the reference structs for | |
85 | * it | |
86 | */ | |
87 | static void | |
88 | add_file_reference(char *name) | |
89 | { | |
90 | xref_file_t *newf; | |
91 | char *nfile; | |
92 | ||
93 | newf = xref_create_file_reference(xref_extract_pathname(name)); | |
94 | newf->next = xref_state->sources; | |
95 | xref_state->sources = newf; | |
96 | push_file_reference(newf); | |
97 | } | |
98 | ||
99 | void | |
100 | xref_init(char *filename, char *preload, int fwd) | |
101 | { | |
102 | xref_file_t *newf; | |
103 | if (!xref_inited) { | |
104 | if (strcmp(filename, "-") == 0) { | |
105 | xref_file = NULL; | |
106 | } else { | |
107 | xref_file = strdup(filename); | |
108 | } | |
109 | if (preload == NULL) { | |
110 | xref_state = xref_create_state(); | |
111 | if (fwd) { | |
112 | xref_state->flags |= XREF_STATE_FWD_DEF; | |
113 | } | |
114 | add_file_reference("Unknown-default"); | |
115 | } else { | |
116 | xref_state = xref_load_file(preload, 0); | |
117 | } | |
118 | } | |
119 | xref_inited = 1; | |
120 | } | |
121 | ||
122 | void | |
123 | xref_generate(int force) | |
124 | { | |
125 | static int xref_done = 0; | |
126 | ||
127 | if (!force && (xref_done++)) | |
128 | return; | |
129 | ||
130 | if (!xref_inited) | |
131 | return; | |
132 | ||
133 | xref_save_file(xref_file, xref_state); | |
134 | } | |
135 | ||
136 | void | |
137 | xref_add_file_reference(char *name) | |
138 | { | |
139 | if (!xref_inited) | |
140 | return; | |
141 | ||
142 | add_file_reference(name); | |
143 | } | |
144 | ||
145 | void | |
146 | xref_remove_file_reference(void) | |
147 | { | |
148 | if (!xref_inited) | |
149 | return; | |
150 | ||
151 | pop_file_reference(xref_state->current_file); | |
152 | } | |
153 | ||
154 | void | |
155 | xref_add_symbol_reference(char *name, int line) | |
156 | { | |
157 | xref_t *xref, *prev; | |
158 | xref_t *fn = xref_state->current_def; | |
159 | ||
160 | if (xref_state->current_def == NULL) | |
161 | return; | |
162 | ||
163 | xref = xref_find_symbol(xref_state->all_refs, name, &prev, | |
164 | (XREF_HIDDEN | XREF_STRING)); | |
165 | if (xref == NULL) { | |
166 | if (xref_state->flags & XREF_STATE_FWD_DEF) { | |
167 | xref = xref_create_reference(name, line, xref_state); | |
168 | xref->flags |= XREF_FORWARD; | |
169 | xref->flags |= XREF_DEFINITION; | |
170 | } else { | |
171 | return; | |
172 | } | |
173 | } | |
174 | xref_add_reference_to_buffer(&fn->calls, xref); | |
175 | xref_add_reference_to_buffer(&xref->called_by, fn); | |
176 | } | |
177 | ||
178 | void | |
179 | xref_add_symbol_definition(char *name, int line) | |
180 | { | |
181 | xref_t *xref, *prev; | |
182 | ||
183 | xref = xref_find_symbol(xref_state->all_refs, name, &prev, | |
184 | (XREF_HIDDEN | XREF_STRING)); | |
185 | ||
186 | if ((xref != NULL) && | |
187 | (xref->linenum == line) && | |
188 | (xref_state->current_file == xref->file)) { | |
189 | /* | |
190 | * the metacompiler causes multiple 'definition' hits | |
191 | * so we ignore the repetitiions. | |
192 | */ | |
193 | #if 0 | |
194 | printf("%s:%d:Still required?\n", | |
195 | xref_state->current_file->name, line); | |
196 | #endif | |
197 | #if 1 | |
198 | return; | |
199 | #endif | |
200 | } | |
201 | xref_state->current_def = xref_create_reference(name, | |
202 | line, xref_state); | |
203 | xref_state->current_def->flags |= XREF_DEFINITION; | |
204 | } | |
205 | ||
206 | void | |
207 | xref_modify_symbol_definition(char *name, int reveal) | |
208 | { | |
209 | xref_t *xref, *prev; | |
210 | ||
211 | /* this can happen because of bootstrapping!! */ | |
212 | if (name == NULL) | |
213 | return; | |
214 | ||
215 | xref = xref_find_symbol(xref_state->all_refs, name, &prev, | |
216 | XREF_STRING); | |
217 | ||
218 | if (xref == NULL) { | |
219 | fprintf(stderr, "%s called for %s (that did not exist)!\n", | |
220 | (reveal ? "reveal" : "hide"), name); | |
221 | return; | |
222 | } | |
223 | if (reveal) | |
224 | xref->flags &= ~XREF_HIDDEN; | |
225 | else | |
226 | xref->flags |= XREF_HIDDEN; | |
227 | } | |
228 | ||
229 | /* | |
230 | * now the fun starts.. we need to break the string up into words | |
231 | * throwing away extra spaces and control chars and add each word to the | |
232 | * index, tagging each word with the XREF_STRING marker. | |
233 | */ | |
234 | void | |
235 | xref_add_string(char *string, int len, int line) | |
236 | { | |
237 | int index; | |
238 | char word[256]; | |
239 | int wordlen; | |
240 | xref_t *xref; | |
241 | ||
242 | index = 0; | |
243 | wordlen = 0; | |
244 | while (index < len) { | |
245 | char c; | |
246 | ||
247 | c = string[index]; | |
248 | if ((c <= ' ') || (c >= 127)) { | |
249 | if (wordlen) { | |
250 | word[wordlen] = 0; | |
251 | wordlen = 0; | |
252 | xref = xref_create_reference(word, line, | |
253 | xref_state); | |
254 | xref->flags |= XREF_STRING; | |
255 | } | |
256 | index++; | |
257 | continue; | |
258 | } | |
259 | word[wordlen++] = c; | |
260 | index++; | |
261 | } | |
262 | if (wordlen) { | |
263 | word[wordlen] = 0; | |
264 | xref = xref_create_reference(word, line, xref_state); | |
265 | xref->flags |= XREF_STRING; | |
266 | } | |
267 | } | |
268 | ||
269 | void | |
270 | xref_status(void) | |
271 | { | |
272 | printf("Current File: '%s'\n", | |
273 | (xref_state->current_file == NULL)? | |
274 | "<NULL>" : xref_state->current_file->name); | |
275 | printf("Last Definition: '%s' (%d)\n", | |
276 | ((xref_state->current_def == NULL)? | |
277 | "<NULL>" : xref_state->current_def->name), | |
278 | ((xref_state->current_def == NULL)? | |
279 | 0 : xref_state->current_def->called_by.insert)); | |
280 | } |