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, struct psi_validate_scope *scope)
  61 {
  62         if (!psi_decl_arg_validate(data, evar->arg, scope)) {
  63                 return false;
  64         }
  65
  66         evar->size = psi_decl_arg_get_size(evar->arg);
  67         if (!evar->size) {
  68                 data->error(data, evar->arg->var->token, PSI_WARNING,
  69                                 "Failed to calculate size of symbol '%s'", evar->arg->var->name);
  70                 return false;
  71         }
  72
  73         if (!evar->sym) {
  74 #ifndef RTLD_NEXT
  75 # define RTLD_NEXT ((void *) -1l)
  76 #endif
  77 #ifndef RTLD_DEFAULT
  78 # define RTLD_DEFAULT ((void *) 0)
  79 #endif
  80                 evar->sym = dlsym(scope->dlopened ?: RTLD_DEFAULT, evar->arg->var->name);
  81                 if (!evar->sym) {
  82                         data->error(data, evar->arg->var->token, PSI_WARNING,
  83                                         "Failed to locate symbol '%s': %s", evar->arg->var->name,
  84                                         dlerror() ?: "not found");
  85                         return false;
  86                 }
  87         }
  88
  89         evar->getter = psi_decl_extvar_getter(evar);
  90         if (!psi_decl_validate_nodl(data, evar->getter, scope)) {
  91                 return false;
  92         }
  93         evar->setter = psi_decl_extvar_setter(evar);
  94         if (!psi_decl_validate_nodl(data, evar->setter, scope)) {
  95                 return false;
  96         }
  97
  98         return true;
  99 }
 100
 101 void psi_decl_extvar_dump(int fd, struct psi_decl_extvar *evar)
 102 {
 103         dprintf(fd, "extern ");
 104         psi_decl_arg_dump(fd, evar->arg, 0);
 105         dprintf(fd, ";\n");
 106 }
 107
 108 struct psi_decl *psi_decl_extvar_setter(struct psi_decl_extvar *evar)
 109 {
 110         struct psi_decl_type *func_type = psi_decl_type_init(PSI_T_VOID, "void");
 111         struct psi_decl_var *func_var = psi_decl_var_copy(evar->arg->var);
 112         struct psi_decl_arg *func = psi_decl_arg_init(func_type, func_var);
 113         struct psi_decl_type *arg_type = psi_decl_type_copy(evar->arg->type);
 114         struct psi_decl_var *arg_var = psi_decl_var_copy(evar->arg->var);
 115         struct psi_decl_arg *arg = psi_decl_arg_init(arg_type, arg_var);
 116         struct psi_plist *args = psi_plist_init((psi_plist_dtor) psi_decl_arg_free);
 117         struct psi_decl *decl = psi_decl_init(func, psi_plist_add(args, &arg));
 118
 119         func_var->pointer_level = 0;
 120         func_var->array_size = 0;
 121         func_var->name = realloc(func_var->name, strlen(evar->arg->var->name) + sizeof("_set"));
 122         strcat(func_var->name, "_set");
 123
 124         return decl;
 125 }
 126
 127 void psi_decl_extvar_set(struct psi_decl_extvar *evar, void *ptr)
 128 {
 129         memcpy(evar->sym, ptr, evar->size);
 130 }
 131
 132 struct psi_decl *psi_decl_extvar_getter(struct psi_decl_extvar *evar)
 133 {
 134         struct psi_decl_type *func_type = psi_decl_type_copy(evar->arg->type);
 135         struct psi_decl_var *func_var = psi_decl_var_copy(evar->arg->var);
 136         struct psi_decl_arg *func = psi_decl_arg_init(func_type, func_var);
 137         struct psi_decl *decl = psi_decl_init(func, NULL);
 138
 139         func_var->name = realloc(func_var->name, strlen(evar->arg->var->name) + sizeof("_get"));
 140         strcat(func_var->name, "_get");
 141
 142         return decl;
 143 }
 144
 145 void psi_decl_extvar_get(struct psi_decl_extvar *evar, void *ptr)
 146 {
 147         memcpy(ptr, evar->sym, evar->size);
 148 }
 149
 150
 151 bool psi_decl_extvar_is_blacklisted(const char *name)
 152 {
 153         char *blacklisted;
 154         size_t i = 0;
 155
 156         while (psi_plist_get(PSI_G(blacklist).vars, i++, &blacklisted)) {
 157                 if (!fnmatch(blacklisted, name, 0)) {
 158                         return true;
 159                 }
 160         }
 161         return false;
 162 }
 163