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
  78         psi_decl_type_dump(dump, decl->func->type, 0);
  79         PSI_DUMP(dump, " ");
  80         PSI_DUMP(dump, "%s%s",
  81                         psi_t_indirection(decl->func->var->pointer_level - !!decl->func->var->array_size),
  82                         decl->func->var->name->val);
  83
  84         PSI_DUMP(dump, "(");
  85         if (decl->args) {
  86                 size_t i;
  87                 struct psi_decl_arg *arg;
  88
  89                 for (i = 0; psi_plist_get(decl->args, i, &arg); ++i) {
  90                         if (i) {
  91                                 PSI_DUMP(dump, ", ");
  92                         }
  93                         psi_decl_arg_dump(dump, arg, 0);
  94                 }
  95                 if (decl->varargs) {
  96                         PSI_DUMP(dump, ", ...");
  97                 }
  98         }
  99         if (decl->func->var->array_size) {
 100                 PSI_DUMP(dump, ")[%u]", decl->func->var->array_size);
 101         } else {
 102                 PSI_DUMP(dump, ")");
 103         }
 104         if (decl->redir) {
 105                 PSI_DUMP(dump, " __asm__ (\"%s\");", decl->redir->val);
 106         } else {
 107                 PSI_DUMP(dump, ";");
 108         }
 109 }
 110
 111 static inline bool psi_decl_validate_func(struct psi_data *data,
 112                 struct psi_decl *decl, struct psi_decl_arg *func)
 113 {
 114         struct psi_func_redir *redir;
 115
 116         if (!func->var->name) {
 117                 data->error(data, func->token, PSI_WARNING, "Cannot load anonymous decl");
 118                 return false;
 119         }
 120
 121         for (redir = &psi_func_redirs[0]; redir->name; ++redir) {
 122                 if (!strcmp(func->var->name->val, redir->name)) {
 123                         decl->sym = redir->func;
 124                         break;
 125                 }
 126         }
 127         if (!decl->sym) {
 128                 decl->sym = psi_dlsym(data->file.dlopened, func->var->name->val,
 129                         decl->redir ? decl->redir->val : NULL);
 130         }
 131         if (!decl->sym) {
 132                 data->error(data, func->token, PSI_WARNING,
 133                                 "Failed to locate symbol '%s(%s)': %s",
 134                                 func->var->name->val,
 135                                 decl->redir ? decl->redir->val : "",
 136                                 psi_dlerror() ?: "not found");
 137                 return false;
 138         }
 139         return true;
 140 }
 141
 142 bool psi_decl_validate(struct psi_data *data, struct psi_decl *decl,
 143                 struct psi_validate_scope *scope)
 144 {
 145         if (!psi_decl_validate_nodl(data, decl, scope)) {
 146                 return false;
 147         }
 148         if (!psi_decl_validate_func(data, decl, decl->func)) {
 149                 return false;
 150         }
 151
 152         return true;
 153 }
 154
 155 bool psi_decl_validate_nodl(struct psi_data *data, struct psi_decl *decl,
 156                 struct psi_validate_scope *scope)
 157 {
 158         if (!decl->abi) {
 159                 decl->abi = psi_decl_abi_init(NULL);
 160         } else if (!psi_decl_abi_validate(data, decl->abi)) {
 161                 data->error(data, decl->abi->token, PSI_WARNING,
 162                                 "Invalid calling convention: '%s'",
 163                                 decl->abi->token->text->val);
 164                 return false;
 165         }
 166         if (!psi_decl_arg_validate(data, decl->func, scope)) {
 167                 return false;
 168         }
 169         if (decl->args) {
 170                 size_t i = 0;
 171                 struct psi_decl_arg *arg;
 172
 173                 while (psi_plist_get(decl->args, i++, &arg)) {
 174                         if (!arg->var->name) {
 175                                 smart_str name = {0};
 176
 177                                 smart_str_appendl_ex(&name, ZEND_STRL("arg"), 1);
 178                                 smart_str_append_unsigned_ex(&name, i, 1);
 179
 180                                 arg->var->name = smart_str_extract(&name);
 181                                 arg->var->fqn = zend_string_copy(arg->var->name);
 182                         }
 183                         if (!psi_decl_arg_validate(data, arg, scope)) {
 184                                 return false;
 185                         }
 186                 }
 187         }
 188
 189         return true;
 190 }
 191
 192 bool psi_decl_is_blacklisted(const char *name)
 193 {
 194         char *blacklisted;
 195         size_t i = 0;
 196
 197         while (psi_plist_get(PSI_G(blacklist).decls, i++, &blacklisted)) {
 198                 if (!fnmatch(blacklisted, name, 0)) {
 199                         return true;
 200                 }
 201         }
 202         return false;
 203 }
 204
 205 struct psi_decl_arg *psi_decl_get_arg(struct psi_decl *decl, struct psi_decl_var *var) {
 206         if (var->arg) {
 207                 size_t i = 0;
 208                 struct psi_decl_arg *arg = decl->func;
 209
 210                 do {
 211                         if (var->arg == arg) {
 212                                 return arg;
 213                         }
 214                 } while (psi_plist_get(decl->args, i++, &arg));
 215         }
 216
 217         return psi_decl_arg_get_by_var(var, decl->args, decl->func);
 218 }