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