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) && SUCCESS != zend_register_functions(NULL, C->closures, NULL, MODULE_PERSISTENT)) {
 215                 C->error(PSI_DATA(C), NULL, PSI_WARNING, "Failed to register functions!");
 216         }
 217
 218         free(cpy);
 219 }
 220
 221 zend_function_entry *psi_context_compile(struct psi_context *C)
 222 {
 223         zend_constant zc;
 224
 225         ZEND_CONSTANT_SET_FLAGS(&zc, CONST_CS|CONST_PERSISTENT, EG(current_module)->module_number);
 226
 227         if (C->consts) {
 228                 size_t i = 0;
 229                 struct psi_const *c;
 230
 231                 while (psi_plist_get(C->consts, i++, &c)) {
 232
 233                         if (zend_get_constant(c->name)) {
 234                                 continue;
 235                         }
 236
 237                         zc.name = zend_string_copy(c->name);
 238                         psi_impl_def_val_get_zval(c->val, c->type ? c->type->type : PSI_T_MIXED, &zc.value);
 239
 240                         zend_register_constant(&zc);
 241                 }
 242         }
 243
 244         if (C->enums) {
 245                 size_t i = 0;
 246                 struct psi_decl_enum *e;
 247
 248                 while (psi_plist_get(C->enums, i++, &e)) {
 249                         size_t j = 0;
 250                         struct psi_decl_enum_item *item;
 251
 252                         while (psi_plist_get(e->items, j++, &item)) {
 253                                 zend_string *name;
 254
 255                                 if (psi_decl_type_is_anon(e->name, "enum")) {
 256                                         name = strpprintf(0, "psi\\%s", item->name->val);
 257                                 } else {
 258                                         name = strpprintf(0, "psi\\%s\\%s", e->name->val, item->name->val);
 259                                 }
 260
 261                                 if (zend_get_constant(name)) {
 262                                         zend_string_release(name);
 263                                         continue;
 264                                 }
 265
 266                                 zc.name = zend_string_dup(name, 1);
 267                                 ZVAL_LONG(&zc.value, psi_num_exp_get_long(item->num, NULL, NULL));
 268                                 zend_register_constant(&zc);
 269                                 zend_string_release(name);
 270                         }
 271                 }
 272         }
 273
 274         return C->closures = C->ops->compile(C);
 275 }
 276
 277
 278 ZEND_RESULT_CODE psi_context_call(struct psi_context *C, zend_execute_data *execute_data, zval *return_value, struct psi_impl *impl)
 279 {
 280         struct psi_call_frame *frame;
 281
 282         frame = psi_call_frame_init(C, impl->decl, impl);
 283
 284         if (SUCCESS != psi_call_frame_parse_args(frame, execute_data)) {
 285                 psi_call_frame_free(frame);
 286
 287                 return FAILURE;
 288         }
 289
 290         psi_call_frame_enter(frame);
 291
 292         if (SUCCESS != psi_call_frame_do_let(frame)) {
 293                 psi_call_frame_do_return(frame, return_value);
 294                 psi_call_frame_free(frame);
 295
 296                 return FAILURE;
 297         }
 298
 299         if (SUCCESS != psi_call_frame_do_assert(frame, PSI_ASSERT_PRE)) {
 300                 psi_call_frame_do_return(frame, return_value);
 301                 psi_call_frame_free(frame);
 302
 303                 return FAILURE;
 304         }
 305
 306         C->ops->call(frame);
 307
 308         if (SUCCESS != psi_call_frame_do_assert(frame, PSI_ASSERT_POST)) {
 309                 psi_call_frame_do_return(frame, return_value);
 310                 psi_call_frame_free(frame);
 311
 312                 return FAILURE;
 313         }
 314
 315         psi_call_frame_do_return(frame, return_value);
 316         psi_call_frame_do_set(frame);
 317         psi_call_frame_do_free(frame);
 318         psi_call_frame_free(frame);
 319
 320         return SUCCESS;
 321 }
 322
 323
 324 void psi_context_dtor(struct psi_context *C)
 325 {
 326         size_t i;
 327         zend_function_entry *zfe;
 328
 329         if (C->ops->dtor) {
 330                 C->ops->dtor(C);
 331         }
 332
 333         psi_data_dtor(PSI_DATA(C));
 334
 335         if (C->data) {
 336                 for (i = 0; i < C->count; ++i) {
 337                         psi_data_dtor(&C->data[i]);
 338                 }
 339                 free(C->data);
 340         }
 341
 342         if (C->closures) {
 343                 for (zfe = C->closures; zfe->fname; ++zfe) {
 344                         free((void *) zfe->arg_info);
 345                 }
 346                 free(C->closures);
 347         }
 348 }
 349
 350 void psi_context_free(struct psi_context **C)
 351 {
 352         if (*C) {
 353                 psi_context_dtor(*C);
 354                 free(*C);
 355                 *C = NULL;
 356         }
 357 }
 358
 359 void psi_context_dump(struct psi_dump *dump, struct psi_context *C)
 360 {
 361         PSI_DUMP(dump, "// psi.engine=%s\n// %lu files\n",
 362                         (char *) C->ops->query(C, PSI_CONTEXT_QUERY_SELF, NULL),
 363                         C->count);
 364
 365         psi_data_dump(dump, PSI_DATA(C));
 366
 367 #if 0
 368         if (C->flags & PSI_DEBUG) {
 369                 size_t i;
 370
 371                 for (i = 0; i < C->count; ++i) {
 372                         psi_data_dump(dump, &C->data[i]);
 373                 }
 374         }
 375 #endif
 376 }