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 <dlfcn.h>
  31 #include <fnmatch.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 = calloc(1, sizeof(*evar));
  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                 if (evar->token) {
  50                         free(evar->token);
  51                 }
  52                 psi_decl_arg_free(&evar->arg);
  53                 psi_decl_free(&evar->getter);
  54                 psi_decl_free(&evar->setter);
  55                 free(evar);
  56         }
  57 }
  58
  59 bool psi_decl_extvar_validate(struct psi_data *data,
  60                 struct psi_decl_extvar *evar, void *dl,
  61                 struct psi_validate_stack *type_stack)
  62 {
  63         if (!psi_decl_arg_validate(data, evar->arg, type_stack)) {
  64                 return false;
  65         }
  66
  67         evar->size = psi_decl_arg_get_size(evar->arg);
  68         if (!evar->size) {
  69                 data->error(data, evar->arg->var->token, PSI_WARNING,
  70                                 "Failed to calculate size of symbol '%s'", evar->arg->var->name);
  71                 return false;
  72         }
  73
  74         if (!evar->sym) {
  75 #ifndef RTLD_NEXT
  76 # define RTLD_NEXT ((void *) -1l)
  77 #endif
  78 #ifndef RTLD_DEFAULT
  79 # define RTLD_DEFAULT ((void *) 0)
  80 #endif
  81                 evar->sym = dlsym(dl ?: RTLD_DEFAULT, evar->arg->var->name);
  82                 if (!evar->sym) {
  83                         data->error(data, evar->arg->var->token, PSI_WARNING,
  84                                         "Failed to locate symbol '%s': %s", evar->arg->var->name,
  85                                         dlerror() ?: "not found");
  86                         return false;
  87                 }
  88         }
  89
  90         evar->getter = psi_decl_extvar_getter(evar);
  91         if (!psi_decl_validate_nodl(data, evar->getter, type_stack)) {
  92                 return false;
  93         }
  94         evar->setter = psi_decl_extvar_setter(evar);
  95         if (!psi_decl_validate_nodl(data, evar->setter, type_stack)) {
  96                 return false;
  97         }
  98
  99         return true;
 100 }
 101
 102 void psi_decl_extvar_dump(int fd, struct psi_decl_extvar *evar)
 103 {
 104         dprintf(fd, "extern ");
 105         psi_decl_arg_dump(fd, evar->arg, 0);
 106         dprintf(fd, ";\n");
 107 }
 108
 109 struct psi_decl *psi_decl_extvar_setter(struct psi_decl_extvar *evar)
 110 {
 111         struct psi_decl_type *func_type = psi_decl_type_init(PSI_T_VOID, "void");
 112         struct psi_decl_var *func_var = psi_decl_var_copy(evar->arg->var);
 113         struct psi_decl_arg *func = psi_decl_arg_init(func_type, func_var);
 114         struct psi_decl_type *arg_type = psi_decl_type_copy(evar->arg->type);
 115         struct psi_decl_var *arg_var = psi_decl_var_copy(evar->arg->var);
 116         struct psi_decl_arg *arg = psi_decl_arg_init(arg_type, arg_var);
 117         struct psi_plist *args = psi_plist_init((psi_plist_dtor) psi_decl_arg_free);
 118         struct psi_decl *decl = psi_decl_init(func, psi_plist_add(args, &arg));
 119
 120         func_var->name = realloc(func_var->name, strlen(evar->arg->var->name) + sizeof("_set"));
 121         strcat(func_var->name, "_set");
 122
 123         return decl;
 124 }
 125
 126 void psi_decl_extvar_set(struct psi_decl_extvar *evar, void *ptr)
 127 {
 128         memcpy(evar->sym, ptr, evar->size);
 129 }
 130
 131 struct psi_decl *psi_decl_extvar_getter(struct psi_decl_extvar *evar)
 132 {
 133         struct psi_decl_type *func_type = psi_decl_type_copy(evar->arg->type);
 134         struct psi_decl_var *func_var = psi_decl_var_copy(evar->arg->var);
 135         struct psi_decl_arg *func = psi_decl_arg_init(func_type, func_var);
 136         struct psi_decl *decl = psi_decl_init(func, NULL);
 137
 138         func_var->name = realloc(func_var->name, strlen(evar->arg->var->name) + sizeof("_get"));
 139         strcat(func_var->name, "_get");
 140
 141         return decl;
 142 }
 143
 144 void psi_decl_extvar_get(struct psi_decl_extvar *evar, void *ptr)
 145 {
 146         memcpy(ptr, evar->sym, evar->size);
 147 }
 148
 149
 150 bool psi_decl_extvar_is_blacklisted(const char *name)
 151 {
 152         char *blacklisted;
 153         size_t i = 0;
 154
 155         while (psi_plist_get(PSI_G(blacklist).vars, i++, &blacklisted)) {
 156                 if (!fnmatch(blacklisted, name, 0)) {
 157                         return true;
 158                 }
 159         }
 160         return false;
 161 }
 162