git.m6w6.name Git - m6w6/ext-psi/blob - src/types/decl.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 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #else
  29 # include "php_config.h"
  30 #endif
  31
  32 #include <fnmatch.h>
  33 #include <Zend/zend_smart_str.h>
  34
  35 #include "php_psi.h"
  36 #include "data.h"
  37 #include "dl.h"
  38
  39 #define PSI_FUNC_REDIRS
  40 #include "php_psi_predef.h"
  41
  42 struct psi_decl *psi_decl_init(struct psi_decl_arg *func, struct psi_plist *args)
  43 {
  44         struct psi_decl *d = pecalloc(1, sizeof(*d), 1);
  45
  46         d->func = func;
  47         d->args = args;
  48
  49         return d;
  50 }
  51
  52 void psi_decl_free(struct psi_decl **d_ptr)
  53 {
  54         if (*d_ptr) {
  55                 struct psi_decl *d = *d_ptr;
  56
  57                 *d_ptr = NULL;
  58
  59                 psi_decl_abi_free(&d->abi);
  60                 psi_decl_arg_free(&d->func);
  61                 if (d->args) {
  62                         psi_plist_free(d->args);
  63                 }
  64                 if (d->redir) {
  65                         zend_string_release(d->redir);
  66                 }
  67                 pefree(d, 1);
  68         }
  69 }
  70
  71 void psi_decl_dump(struct psi_dump *dump, struct psi_decl *decl)
  72 {
  73         if (decl->abi) {
  74                 psi_decl_abi_dump(dump, decl->abi);
  75         }
  76         PSI_DUMP(dump, " ");
  77         /* FIXME: functions returning arrays */
  78         psi_decl_arg_dump(dump, decl->func, 0);
  79         PSI_DUMP(dump, "(");
  80         if (decl->args) {
  81                 size_t i;
  82                 struct psi_decl_arg *arg;
  83
  84                 for (i = 0; psi_plist_get(decl->args, i, &arg); ++i) {
  85                         if (i) {
  86                                 PSI_DUMP(dump, ", ");
  87                         }
  88                         psi_decl_arg_dump(dump, arg, 0);
  89                 }
  90                 if (decl->varargs) {
  91                         PSI_DUMP(dump, ", ...");
  92                 }
  93         }
  94         if (decl->func->var->array_size) {
  95                 PSI_DUMP(dump, ")[%u]", decl->func->var->array_size);
  96         }
  97         if (decl->redir) {
  98                 PSI_DUMP(dump, ") __asm__ (\"%s\");", decl->redir->val);
  99         } else {
 100                 PSI_DUMP(dump, ");");
 101         }
 102 }
 103
 104 static inline bool psi_decl_validate_func(struct psi_data *data,
 105                 struct psi_decl *decl, struct psi_decl_arg *func)
 106 {
 107         struct psi_func_redir *redir;
 108
 109         if (!func->var->name) {
 110                 data->error(data, func->token, PSI_WARNING, "Cannot load anonymous decl");
 111                 return false;
 112         }
 113
 114         for (redir = &psi_func_redirs[0]; redir->name; ++redir) {
 115                 if (!strcmp(func->var->name->val, redir->name)) {
 116                         decl->sym = redir->func;
 117                         break;
 118                 }
 119         }
 120         if (!decl->sym) {
 121                 decl->sym = psi_dlsym(data->file.dlopened, func->var->name->val,
 122                         decl->redir ? decl->redir->val : NULL);
 123         }
 124         if (!decl->sym) {
 125                 data->error(data, func->token, PSI_WARNING,
 126                                 "Failed to locate symbol '%s(%s)': %s",
 127                                 func->var->name->val,
 128                                 decl->redir ? decl->redir->val : "",
 129                                 psi_dlerror() ?: "not found");
 130                 return false;
 131         }
 132         return true;
 133 }
 134
 135 bool psi_decl_validate(struct psi_data *data, struct psi_decl *decl,
 136                 struct psi_validate_scope *scope)
 137 {
 138         if (!psi_decl_validate_nodl(data, decl, scope)) {
 139                 return false;
 140         }
 141         if (!psi_decl_validate_func(data, decl, decl->func)) {
 142                 return false;
 143         }
 144
 145         return true;
 146 }
 147
 148 bool psi_decl_validate_nodl(struct psi_data *data, struct psi_decl *decl,
 149                 struct psi_validate_scope *scope)
 150 {
 151         if (!decl->abi) {
 152                 decl->abi = psi_decl_abi_init(NULL);
 153         } else if (!psi_decl_abi_validate(data, decl->abi)) {
 154                 data->error(data, decl->abi->token, PSI_WARNING,
 155                                 "Invalid calling convention: '%s'",
 156                                 decl->abi->token->text->val);
 157                 return false;
 158         }
 159         if (!psi_decl_arg_validate(data, decl->func, scope)) {
 160                 return false;
 161         }
 162         if (decl->args) {
 163                 size_t i = 0;
 164                 struct psi_decl_arg *arg;
 165
 166                 while (psi_plist_get(decl->args, i++, &arg)) {
 167                         if (!arg->var->name) {
 168                                 smart_str name = {0};
 169
 170                                 smart_str_appendl_ex(&name, ZEND_STRL("arg"), 1);
 171                                 smart_str_append_unsigned_ex(&name, i, 1);
 172
 173                                 arg->var->name = smart_str_extract(&name);
 174                                 arg->var->fqn = zend_string_copy(arg->var->name);
 175                         }
 176                         if (!psi_decl_arg_validate(data, arg, scope)) {
 177                                 return false;
 178                         }
 179                 }
 180         }
 181
 182         return true;
 183 }
 184
 185 bool psi_decl_is_blacklisted(const char *name)
 186 {
 187         char *blacklisted;
 188         size_t i = 0;
 189
 190         while (psi_plist_get(PSI_G(blacklist).decls, i++, &blacklisted)) {
 191                 if (!fnmatch(blacklisted, name, 0)) {
 192                         return true;
 193                 }
 194         }
 195         return false;
 196 }
 197
 198 struct psi_decl_arg *psi_decl_get_arg(struct psi_decl *decl, struct psi_decl_var *var) {
 199         if (var->arg) {
 200                 size_t i = 0;
 201                 struct psi_decl_arg *arg = decl->func;
 202
 203                 do {
 204                         if (var->arg == arg) {
 205                                 return arg;
 206                         }
 207                 } while (psi_plist_get(decl->args, i++, &arg));
 208         }
 209
 210         return psi_decl_arg_get_by_var(var, decl->args, decl->func);
 211 }