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 #include "php_psi.h"
  32
  33 #include <dlfcn.h>
  34 #include <fnmatch.h>
  35
  36 #include <Zend/zend_smart_str.h>
  37
  38 #include "data.h"
  39
  40 #define PSI_FUNC_REDIRS
  41 #include "php_psi_predef.h"
  42
  43 struct psi_decl *psi_decl_init(struct psi_decl_arg *func, struct psi_plist *args)
  44 {
  45         struct psi_decl *d = pecalloc(1, sizeof(*d), 1);
  46
  47         d->func = func;
  48         d->args = args;
  49
  50         return d;
  51 }
  52
  53 void psi_decl_free(struct psi_decl **d_ptr)
  54 {
  55         if (*d_ptr) {
  56                 struct psi_decl *d = *d_ptr;
  57
  58                 *d_ptr = NULL;
  59
  60                 psi_decl_abi_free(&d->abi);
  61                 psi_decl_arg_free(&d->func);
  62                 if (d->args) {
  63                         psi_plist_free(d->args);
  64                 }
  65                 if (d->redir) {
  66                         zend_string_release(d->redir);
  67                 }
  68                 free(d);
  69         }
  70 }
  71
  72 void psi_decl_dump(struct psi_dump *dump, struct psi_decl *decl)
  73 {
  74         if (decl->abi) {
  75                 psi_decl_abi_dump(dump, decl->abi);
  76         }
  77         PSI_DUMP(dump, " ");
  78         /* FIXME: functions returning arrays */
  79         psi_decl_arg_dump(dump, decl->func, 0);
  80         PSI_DUMP(dump, "(");
  81         if (decl->args) {
  82                 size_t i;
  83                 struct psi_decl_arg *arg;
  84
  85                 for (i = 0; psi_plist_get(decl->args, i, &arg); ++i) {
  86                         if (i) {
  87                                 PSI_DUMP(dump, ", ");
  88                         }
  89                         psi_decl_arg_dump(dump, arg, 0);
  90                 }
  91                 if (decl->varargs) {
  92                         PSI_DUMP(dump, ", ...");
  93                 }
  94         }
  95         if (decl->func->var->array_size) {
  96                 PSI_DUMP(dump, ")[%u]", decl->func->var->array_size);
  97         }
  98         if (decl->redir) {
  99                 PSI_DUMP(dump, ") __asm__ (\"%s\");", decl->redir->val);
 100         } else {
 101                 PSI_DUMP(dump, ");");
 102         }
 103 }
 104
 105 static inline bool psi_decl_validate_func(struct psi_data *data,
 106                 struct psi_decl *decl, struct psi_decl_arg *func)
 107 {
 108         struct psi_func_redir *redir;
 109
 110         if (!func->var->name) {
 111                 data->error(data, func->token, PSI_WARNING, "Cannot load anonymous decl");
 112                 return false;
 113         }
 114
 115         for (redir = &psi_func_redirs[0]; redir->name; ++redir) {
 116                 if (!strcmp(func->var->name->val, redir->name)) {
 117                         decl->sym = redir->func;
 118                         break;
 119                 }
 120         }
 121         if (!decl->sym) {
 122                 decl->sym = psi_dlsym(data->file.dlopened, func->var->name->val,
 123                         decl->redir ? decl->redir->val : NULL);
 124         }
 125         if (!decl->sym) {
 126                 data->error(data, func->token, PSI_WARNING,
 127                                 "Failed to locate symbol '%s(%s)': %s",
 128                                 func->var->name->val,
 129                                 decl->redir ? decl->redir->val : "",
 130                                 dlerror() ?: "not found");
 131                 return false;
 132         }
 133         return true;
 134 }
 135
 136 bool psi_decl_validate(struct psi_data *data, struct psi_decl *decl,
 137                 struct psi_validate_scope *scope)
 138 {
 139         if (!psi_decl_validate_nodl(data, decl, scope)) {
 140                 return false;
 141         }
 142         if (!psi_decl_validate_func(data, decl, decl->func)) {
 143                 return false;
 144         }
 145
 146         return true;
 147 }
 148
 149 bool psi_decl_validate_nodl(struct psi_data *data, struct psi_decl *decl,
 150                 struct psi_validate_scope *scope)
 151 {
 152         if (!decl->abi) {
 153                 decl->abi = psi_decl_abi_init(NULL);
 154         } else if (!psi_decl_abi_validate(data, decl->abi)) {
 155                 data->error(data, decl->abi->token, PSI_WARNING,
 156                                 "Invalid calling convention: '%s'",
 157                                 decl->abi->token->text->val);
 158                 return false;
 159         }
 160         if (!psi_decl_arg_validate(data, decl->func, scope)) {
 161                 return false;
 162         }
 163         if (decl->args) {
 164                 size_t i = 0;
 165                 struct psi_decl_arg *arg;
 166
 167                 while (psi_plist_get(decl->args, i++, &arg)) {
 168                         if (!arg->var->name) {
 169                                 smart_str name = {0};
 170
 171                                 smart_str_appendl_ex(&name, ZEND_STRL("arg"), 1);
 172                                 smart_str_append_unsigned_ex(&name, i, 1);
 173
 174                                 arg->var->name = smart_str_extract(&name);
 175                                 arg->var->fqn = zend_string_copy(arg->var->name);
 176                         }
 177                         if (!psi_decl_arg_validate(data, arg, scope)) {
 178                                 return false;
 179                         }
 180                 }
 181         }
 182
 183         return true;
 184 }
 185
 186 bool psi_decl_is_blacklisted(const char *name)
 187 {
 188         char *blacklisted;
 189         size_t i = 0;
 190
 191         while (psi_plist_get(PSI_G(blacklist).decls, i++, &blacklisted)) {
 192                 if (!fnmatch(blacklisted, name, 0)) {
 193                         return true;
 194                 }
 195         }
 196         return false;
 197 }
 198
 199 struct psi_decl_arg *psi_decl_get_arg(struct psi_decl *decl, struct psi_decl_var *var) {
 200         if (var->arg) {
 201                 size_t i = 0;
 202                 struct psi_decl_arg *arg = decl->func;
 203
 204                 do {
 205                         if (var->arg == arg) {
 206                                 return arg;
 207                         }
 208                 } while (psi_plist_get(decl->args, i++, &arg));
 209         }
 210
 211         return psi_decl_arg_get_by_var(var, decl->args, decl->func);
 212 }