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

   1 /*******************************************************************************
   2  Copyright (c) 2017, 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 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #else
  29 # include "php_config.h"
  30 #endif
  31
  32 #include "php_psi.h"
  33
  34 #include <fnmatch.h>
  35 #include <Zend/zend_smart_str.h>
  36
  37 #include "data.h"
  38
  39 struct psi_decl_extvar *psi_decl_extvar_init(struct psi_decl_arg *arg)
  40 {
  41         struct psi_decl_extvar *evar = pecalloc(1, sizeof(*evar), 1);
  42
  43         evar->arg = arg;
  44         return evar;
  45 }
  46
  47 void psi_decl_extvar_free(struct psi_decl_extvar **evar_ptr)
  48 {
  49         if (*evar_ptr) {
  50                 struct psi_decl_extvar *evar = *evar_ptr;
  51
  52                 *evar_ptr = NULL;
  53                 psi_token_free(&evar->token);
  54                 psi_decl_arg_free(&evar->arg);
  55                 psi_decl_free(&evar->getter);
  56                 psi_decl_free(&evar->setter);
  57                 free(evar);
  58         }
  59 }
  60
  61 bool psi_decl_extvar_validate(struct psi_data *data,
  62                 struct psi_decl_extvar *evar, struct psi_validate_scope *scope)
  63 {
  64         if (!psi_decl_arg_validate(data, evar->arg, scope)) {
  65                 return false;
  66         }
  67
  68         evar->size = psi_decl_arg_get_size(evar->arg);
  69         if (!evar->size) {
  70                 data->error(data, evar->arg->var->token, PSI_WARNING,
  71                                 "Failed to calculate size of symbol '%s'", evar->arg->var->name->val);
  72                 return false;
  73         }
  74
  75         if (!evar->sym) {
  76                 evar->sym = psi_dlsym(data->file.dlopened, evar->arg->var->name->val,
  77                         evar->redir ? evar->redir->val : NULL);
  78         }
  79         if (!evar->sym) {
  80                 data->error(data, evar->arg->var->token, PSI_WARNING,
  81                                 "Failed to locate symbol '%s': %s", evar->arg->var->name->val,
  82                                 dlerror() ?: "not found");
  83                 return false;
  84         }
  85
  86         evar->getter = psi_decl_extvar_getter(evar);
  87         if (!psi_decl_validate_nodl(data, evar->getter, scope)) {
  88                 return false;
  89         }
  90         evar->setter = psi_decl_extvar_setter(evar);
  91         if (!psi_decl_validate_nodl(data, evar->setter, scope)) {
  92                 return false;
  93         }
  94
  95         return true;
  96 }
  97
  98 void psi_decl_extvar_dump(struct psi_dump *dump, struct psi_decl_extvar *evar)
  99 {
 100         PSI_DUMP(dump, "extern ");
 101         psi_decl_arg_dump(dump, evar->arg, 0);
 102         PSI_DUMP(dump, ";\n");
 103 }
 104
 105 struct psi_decl *psi_decl_extvar_setter(struct psi_decl_extvar *evar)
 106 {
 107         zend_string *type_str = psi_string_init_interned(ZEND_STRS("void"), 1);
 108         struct psi_decl_type *func_type = psi_decl_type_init(PSI_T_VOID, type_str);
 109         struct psi_decl_var *func_var = psi_decl_var_copy(evar->arg->var);
 110         struct psi_decl_arg *func = psi_decl_arg_init(func_type, func_var);
 111         struct psi_decl_type *arg_type = psi_decl_type_copy(evar->arg->type);
 112         struct psi_decl_var *arg_var = psi_decl_var_copy(evar->arg->var);
 113         struct psi_decl_arg *arg = psi_decl_arg_init(arg_type, arg_var);
 114         struct psi_plist *args = psi_plist_init((psi_plist_dtor) psi_decl_arg_free);
 115         struct psi_decl *decl = psi_decl_init(func, psi_plist_add(args, &arg));
 116         smart_str name = {0};
 117
 118         zend_string_release(type_str);
 119
 120         func_var->pointer_level = 0;
 121         func_var->array_size = 0;
 122
 123         smart_str_append_ex(&name, func_var->name, 1);
 124         smart_str_appendl_ex(&name, ZEND_STRL("_set"), 1);
 125         zend_string_release(func_var->name);
 126         func_var->name = psi_new_interned_string(smart_str_extract(&name));
 127
 128         decl->extvar = 1;
 129
 130         return decl;
 131 }
 132
 133 void psi_decl_extvar_set(struct psi_decl_extvar *evar, void *ptr)
 134 {
 135         memcpy(evar->sym, ptr, evar->size);
 136 }
 137
 138 struct psi_decl *psi_decl_extvar_getter(struct psi_decl_extvar *evar)
 139 {
 140         struct psi_decl_type *func_type = psi_decl_type_copy(evar->arg->type);
 141         struct psi_decl_var *func_var = psi_decl_var_copy(evar->arg->var);
 142         struct psi_decl_arg *func = psi_decl_arg_init(func_type, func_var);
 143         struct psi_decl *decl = psi_decl_init(func, NULL);
 144         smart_str name = {0};
 145
 146         smart_str_append_ex(&name, func_var->name, 1);
 147         smart_str_appendl_ex(&name, ZEND_STRL("_get"), 1);
 148         zend_string_release(func_var->name);
 149         func_var->name = psi_new_interned_string(smart_str_extract(&name));
 150
 151         decl->extvar = 1;
 152
 153         return decl;
 154 }
 155
 156 void psi_decl_extvar_get(struct psi_decl_extvar *evar, void *ptr)
 157 {
 158         if (evar->arg->var->array_size) {
 159                 /* arrays are passed as pointer */
 160                 *(void **) ptr = evar->sym;
 161         } else {
 162                 memcpy(ptr, evar->sym, evar->size);
 163         }
 164 }
 165
 166
 167 bool psi_decl_extvar_is_blacklisted(const char *name)
 168 {
 169         char *blacklisted;
 170         size_t i = 0;
 171
 172         while (psi_plist_get(PSI_G(blacklist).vars, i++, &blacklisted)) {
 173                 if (!fnmatch(blacklisted, name, 0)) {
 174                         return true;
 175                 }
 176         }
 177         return false;
 178 }