| 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 | } |