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