git.m6w6.name Git - m6w6/ext-psi/blob - src/context.c

   1 /*******************************************************************************
   2  Copyright (c) 2016, Michael Wallner <mike@php.net>.
   3  All rights reserved.
   4
   5  Redistribution and use in source and binary forms, with or without
   6  modification, are permitted provided that the following conditions are met:
   7
   8      * Redistributions of source code must retain the above copyright notice,
   9        this list of conditions and the following disclaimer.
  10      * Redistributions in binary form must reproduce the above copyright
  11        notice, this list of conditions and the following disclaimer in the
  12        documentation and/or other materials provided with the distribution.
  13
  14  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  15  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  17  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
  18  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  20  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  21  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  22  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24 *******************************************************************************/
  25
  26 #include "php_psi_stdinc.h"
  27
  28 #include "php.h"
  29
  30 #ifdef HAVE_DIRENT_H
  31 # include <dirent.h>
  32 # define NAMLEN(dirent) strlen ((dirent)->d_name)
  33 #else
  34 # define dirent direct
  35 # define NAMLEN(dirent) ((dirent)->d_namlen)
  36 # ifdef HAVE_SYS_NDIR_H
  37 #  include <sys/ndir.h>
  38 # endif
  39 # ifdef HAVE_SYS_DIR_H
  40 #  include <sys/dir.h>
  41 # endif
  42 # ifdef HAVE_NDIR_H
  43 #  include <ndir.h>
  44 # endif
  45 #endif
  46
  47 #include <fnmatch.h>
  48
  49 #include "php_scandir.h"
  50 #include "php_psi.h"
  51 #include "calc.h"
  52 #include "call.h"
  53 #include "libjit.h"
  54 #include "libffi.h"
  55
  56 #include "token.h"
  57 #include "parser.h"
  58
  59 #include "php_psi_posix.h"
  60
  61 PHP_MINIT_FUNCTION(psi_context)
  62 {
  63         unsigned flags = 0;
  64         struct psi_context_ops *ops = NULL;
  65
  66 #ifdef HAVE_LIBJIT
  67         if (!strcasecmp(PSI_G(engine), "jit")) {
  68                 ops = psi_libjit_ops();
  69         } else
  70 #endif
  71 #ifdef HAVE_LIBFFI
  72                 ops = psi_libffi_ops();
  73 #endif
  74
  75         if (!ops) {
  76                 php_error(E_WARNING, "No PSI engine found");
  77                 return FAILURE;
  78         }
  79
  80         PSI_G(ops) = ops;
  81         if (ops->load && SUCCESS != ops->load()) {
  82                 return FAILURE;
  83         }
  84
  85         if (psi_check_env("PSI_DEBUG")) {
  86                 flags |= PSI_DEBUG;
  87         }
  88         if (psi_check_env("PSI_SILENT")) {
  89                 flags |= PSI_SILENT;
  90         }
  91
  92         PSI_G(context) = psi_context_init(NULL, PSI_G(ops), psi_error_wrapper, flags);
  93         psi_context_build(PSI_G(context), PSI_G(directory));
  94
  95         return SUCCESS;
  96 }
  97
  98 PHP_MSHUTDOWN_FUNCTION(psi_context)
  99 {
 100         if (psi_check_env("PSI_DUMP")) {
 101                 struct psi_dump dump = {{.hn = stdout}, (psi_dump_cb) fprintf};
 102
 103                 psi_context_dump(&dump, PSI_G(context));
 104         }
 105
 106         psi_context_free(&PSI_G(context));
 107
 108         if (PSI_G(ops)->free) {
 109                 PSI_G(ops)->free();
 110         }
 111
 112         return SUCCESS;
 113 }
 114
 115 struct psi_context *psi_context_init(struct psi_context *C, struct psi_context_ops *ops, psi_error_cb error, unsigned flags)
 116 {
 117         if (!C) {
 118                 C = pemalloc(sizeof(*C), 1);
 119         }
 120         memset(C, 0, sizeof(*C));
 121
 122         psi_data_ctor(PSI_DATA(C), error, flags);
 123         C->ops = ops;
 124
 125         if (ops->init) {
 126                 ops->init(C);
 127         }
 128
 129         assert(ops->call != NULL);
 130         assert(ops->compile != NULL);
 131
 132         return C;
 133 }
 134
 135 static int psi_select_dirent(const struct dirent *entry)
 136 {
 137 #ifndef FNM_CASEFOLD
 138 # define FNM_CASEFOLD 0
 139 #endif
 140         return 0 == fnmatch("*.psi", entry->d_name, FNM_CASEFOLD);
 141 }
 142
 143 static bool psi_context_add(struct psi_context *C, struct psi_parser *P)
 144 {
 145         bool valid;
 146         struct psi_data *D;
 147         struct psi_validate_scope scope = {0};
 148
 149         C->data = safe_perealloc(C->data, (C->count + 1), sizeof(*C->data), 0, 1);
 150         D = psi_data_exchange(&C->data[C->count++], PSI_DATA(P));
 151
 152         psi_validate_scope_ctor(&scope);
 153         scope.cpp = P->preproc;
 154         valid = psi_validate(&scope, PSI_DATA(C), D);
 155         psi_validate_scope_dtor(&scope);
 156
 157         return valid;
 158 }
 159
 160 void psi_context_build(struct psi_context *C, const char *paths)
 161 {
 162         int i, n;
 163         char *sep = NULL, *cpy = strdup(paths), *ptr = cpy;
 164         struct dirent **entries;
 165
 166         do {
 167                 sep = strchr(ptr, ':');
 168
 169                 if (sep) {
 170                         *sep = 0;
 171                 }
 172
 173                 entries = NULL;
 174                 n = php_scandir(ptr, &entries, psi_select_dirent, alphasort);
 175
 176                 if (n > 0) {
 177                         for (i = 0; i < n; ++i) {
 178                                 char psi[MAXPATHLEN];
 179                                 struct psi_parser P;
 180                                 struct psi_parser_input *I;
 181
 182                                 if (MAXPATHLEN <= slprintf(psi, MAXPATHLEN, "%s/%s", ptr, entries[i]->d_name)) {
 183                                         C->error(PSI_DATA(C), NULL, PSI_WARNING, "Path to PSI file too long: %s/%s",
 184                                                 ptr, entries[i]->d_name);
 185                                 }
 186                                 if (!psi_parser_init(&P, C->error, C->flags)) {
 187                                         C->error(PSI_DATA(C), NULL, PSI_WARNING, "Failed to init PSI parser (%s): %s",
 188                                                 psi, strerror(errno));
 189                                         continue;
 190                                 }
 191                                 if (!(I = psi_parser_open_file(&P, psi, true))) {
 192                                         C->error(PSI_DATA(C), NULL, PSI_WARNING, "Failed to open PSI file (%s): %s",
 193                                                 psi, strerror(errno));
 194                                         continue;
 195                                 }
 196                                 psi_parser_parse(&P, I);
 197                                 psi_context_add(C, &P);
 198                                 psi_parser_dtor(&P);
 199                                 psi_parser_input_free(&I);
 200                         }
 201                 }
 202
 203                 if (entries) {
 204                         for (i = 0; i < n; ++i) {
 205                                 free(entries[i]);
 206                         }
 207                         free(entries);
 208                 }
 209
 210                 ptr = sep + 1;
 211         } while (sep);
 212
 213
 214         if (psi_context_compile(C)) {
 215                 /* zend_register_functions depends on EG(current_module) pointing into module */
 216                 EG(current_module) = zend_hash_str_find_ptr(&module_registry, "psi", sizeof("psi") - 1);
 217                 if (SUCCESS != zend_register_functions(NULL, C->closures, NULL, MODULE_PERSISTENT)) {
 218                         C->error(PSI_DATA(C), NULL, PSI_WARNING, "Failed to register functions!");
 219                 }
 220                 EG(current_module) = NULL;
 221         }
 222
 223         free(cpy);
 224 }
 225
 226 #include <ctype.h>
 227 static inline bool prefix_match(zend_string *a, zend_string *b)
 228 {
 229         size_t i;
 230
 231         for (i = 0; i < a->len && i < b->len; ++i) {
 232                 if (tolower(a->val[i]) != tolower(b->val[i])) {
 233                         return false;
 234                 }
 235                 if (i && a->val[i] == '_') {
 236                         break;
 237                 }
 238         }
 239
 240         return true;
 241 }
 242
 243 zend_function_entry *psi_context_compile(struct psi_context *C)
 244 {
 245         zend_constant zc;
 246
 247         ZEND_CONSTANT_SET_FLAGS(&zc, CONST_CS|CONST_PERSISTENT, EG(current_module)->module_number);
 248
 249         if (C->consts) {
 250                 size_t i = 0;
 251                 struct psi_const *c;
 252
 253                 while (psi_plist_get(C->consts, i++, &c)) {
 254
 255                         if (zend_get_constant(c->name)) {
 256                                 continue;
 257                         }
 258
 259                         zc.name = zend_string_copy(c->name);
 260                         psi_impl_def_val_get_zval(c->val, c->type ? c->type->type : PSI_T_MIXED, &zc.value);
 261
 262                         zend_register_constant(&zc);
 263                 }
 264         }
 265
 266         if (C->enums) {
 267                 size_t i = 0;
 268                 struct psi_decl_enum *e;
 269
 270                 while (psi_plist_get(C->enums, i++, &e)) {
 271                         size_t j = 0;
 272                         struct psi_decl_enum_item *item;
 273
 274                         while (psi_plist_get(e->items, j++, &item)) {
 275                                 zend_string *name;
 276
 277                                 if (psi_decl_type_is_anon(e->name, "enum")
 278                                                 || prefix_match(e->name, item->name)) {
 279                                         name = strpprintf(0, "psi\\%s", item->name->val);
 280                                 } else {
 281
 282                                         name = strpprintf(0, "psi\\%s\\%s", e->name->val, item->name->val);
 283                                 }
 284
 285                                 if (zend_get_constant(name)) {
 286                                         zend_string_release(name);
 287                                         continue;
 288                                 }
 289
 290                                 zc.name = zend_string_dup(name, 1);
 291                                 ZVAL_LONG(&zc.value, psi_num_exp_get_long(item->num, NULL, NULL));
 292                                 zend_register_constant(&zc);
 293                                 zend_string_release(name);
 294                         }
 295                 }
 296         }
 297
 298         return C->closures = C->ops->compile(C);
 299 }
 300
 301
 302 ZEND_RESULT_CODE psi_context_call(struct psi_context *C, zend_execute_data *execute_data, zval *return_value, struct psi_impl *impl)
 303 {
 304         struct psi_call_frame *frame;
 305
 306         frame = psi_call_frame_init(C, impl->decl, impl);
 307
 308         if (SUCCESS != psi_call_frame_parse_args(frame, execute_data)) {
 309                 psi_call_frame_free(frame);
 310
 311                 return FAILURE;
 312         }
 313
 314         psi_call_frame_enter(frame);
 315
 316         if (SUCCESS != psi_call_frame_do_let(frame)) {
 317                 psi_call_frame_do_return(frame, return_value);
 318                 psi_call_frame_free(frame);
 319
 320                 return FAILURE;
 321         }
 322
 323         if (SUCCESS != psi_call_frame_do_assert(frame, PSI_ASSERT_PRE)) {
 324                 psi_call_frame_do_return(frame, return_value);
 325                 psi_call_frame_free(frame);
 326
 327                 return FAILURE;
 328         }
 329
 330         C->ops->call(frame);
 331
 332         if (SUCCESS != psi_call_frame_do_assert(frame, PSI_ASSERT_POST)) {
 333                 psi_call_frame_do_return(frame, return_value);
 334                 psi_call_frame_free(frame);
 335
 336                 return FAILURE;
 337         }
 338
 339         psi_call_frame_do_return(frame, return_value);
 340         psi_call_frame_do_set(frame);
 341         psi_call_frame_do_free(frame);
 342         psi_call_frame_free(frame);
 343
 344         return SUCCESS;
 345 }
 346
 347
 348 void psi_context_dtor(struct psi_context *C)
 349 {
 350         size_t i;
 351         zend_function_entry *zfe;
 352
 353         if (C->ops->dtor) {
 354                 C->ops->dtor(C);
 355         }
 356
 357         psi_data_dtor(PSI_DATA(C));
 358
 359         if (C->data) {
 360                 for (i = 0; i < C->count; ++i) {
 361                         psi_data_dtor(&C->data[i]);
 362                 }
 363                 free(C->data);
 364         }
 365
 366         if (C->closures) {
 367                 for (zfe = C->closures; zfe->fname; ++zfe) {
 368                         free((void *) zfe->arg_info);
 369                 }
 370                 free(C->closures);
 371         }
 372 }
 373
 374 void psi_context_free(struct psi_context **C)
 375 {
 376         if (*C) {
 377                 psi_context_dtor(*C);
 378                 free(*C);
 379                 *C = NULL;
 380         }
 381 }
 382
 383 void psi_context_dump(struct psi_dump *dump, struct psi_context *C)
 384 {
 385         PSI_DUMP(dump, "// psi.engine=%s\n// %lu files\n",
 386                         (char *) C->ops->query(C, PSI_CONTEXT_QUERY_SELF, NULL),
 387                         C->count);
 388
 389         psi_data_dump(dump, PSI_DATA(C));
 390
 391 #if 0
 392         if (C->flags & PSI_DEBUG) {
 393                 size_t i;
 394
 395                 for (i = 0; i < C->count; ++i) {
 396                         psi_data_dump(dump, &C->data[i]);
 397                 }
 398         }
 399 #endif
 400 }