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
  28 #include "php_psi.h"
  29
  30 #include <dlfcn.h>
  31 #include <fnmatch.h>
  32
  33 #include "data.h"
  34
  35 #define PSI_FUNC_REDIRS
  36 #include "php_psi_posix.h"
  37
  38 struct psi_decl *psi_decl_init(struct psi_decl_arg *func, struct psi_plist *args)
  39 {
  40         struct psi_decl *d = calloc(1, sizeof(*d));
  41
  42         d->func = func;
  43         d->args = args;
  44
  45         return d;
  46 }
  47
  48 void psi_decl_free(struct psi_decl **d_ptr)
  49 {
  50         if (*d_ptr) {
  51                 struct psi_decl *d = *d_ptr;
  52
  53                 *d_ptr = NULL;
  54
  55                 psi_decl_abi_free(&d->abi);
  56                 psi_decl_arg_free(&d->func);
  57                 if (d->args) {
  58                         psi_plist_free(d->args);
  59                 }
  60                 free(d);
  61         }
  62 }
  63
  64 void psi_decl_dump(int fd, struct psi_decl *decl)
  65 {
  66         psi_decl_abi_dump(fd, decl->abi);
  67         dprintf(fd, " ");
  68         psi_decl_arg_dump(fd, decl->func, 0);
  69         dprintf(fd, "(");
  70         if (decl->args) {
  71                 size_t i;
  72                 struct psi_decl_arg *arg;
  73
  74                 for (i = 0; psi_plist_get(decl->args, i, &arg); ++i) {
  75                         if (i) {
  76                                 dprintf(fd, ", ");
  77                         }
  78                         psi_decl_arg_dump(fd, arg, 0);
  79                 }
  80                 if (decl->varargs) {
  81                         dprintf(fd, ", ...");
  82                 }
  83         }
  84         dprintf(fd, ");");
  85 }
  86
  87 static inline bool psi_decl_validate_func(struct psi_data *data,
  88                 struct psi_decl *decl, struct psi_decl_arg *func, void *dl)
  89 {
  90         struct psi_func_redir *redir;
  91
  92         if (!func->var->name) {
  93                 data->error(data, func->token, PSI_WARNING, "Cannot load anonymous decl");
  94                 return false;
  95         }
  96
  97         for (redir = &psi_func_redirs[0]; redir->name; ++redir) {
  98                 if (!strcmp(func->var->name, redir->name)) {
  99                         decl->sym = redir->func;
 100                 }
 101         }
 102         if (!decl->sym) {
 103 #ifndef RTLD_NEXT
 104 # define RTLD_NEXT ((void *) -1l)
 105 #endif
 106 #ifndef RTLD_DEFAULT
 107 # define RTLD_DEFAULT ((void *) 0)
 108 #endif
 109                 decl->sym = dlsym(dl ?: RTLD_DEFAULT, func->var->name);
 110                 if (!decl->sym) {
 111                         data->error(data, func->token, PSI_WARNING,
 112                                         "Failed to locate symbol '%s': %s", func->var->name,
 113                                         dlerror() ?: "not found");
 114                         return false;
 115                 }
 116         }
 117         return true;
 118 }
 119
 120 bool psi_decl_validate(struct psi_data *data, struct psi_decl *decl, void *dl,
 121                 struct psi_validate_stack *type_stack)
 122 {
 123         if (!psi_decl_validate_nodl(data, decl, type_stack)) {
 124                 return false;
 125         }
 126         if (!psi_decl_validate_func(data, decl, decl->func, dl)) {
 127                 return false;
 128         }
 129
 130         return true;
 131 }
 132
 133 bool psi_decl_validate_nodl(struct psi_data *data, struct psi_decl *decl,
 134                 struct psi_validate_stack *type_stack)
 135 {
 136         if (!decl->abi) {
 137                 decl->abi = psi_decl_abi_init("default");
 138         } else if (!psi_decl_abi_validate(data, decl->abi)) {
 139                 data->error(data, decl->abi->token, PSI_WARNING,
 140                                 "Invalid calling convention: '%s'", decl->abi->token->text);
 141                 return false;
 142         }
 143         if (!psi_decl_arg_validate(data, decl->func, type_stack)) {
 144                 return false;
 145         }
 146         if (decl->args) {
 147                 size_t i = 0;
 148                 struct psi_decl_arg *arg;
 149
 150                 while (psi_plist_get(decl->args, i++, &arg)) {
 151                         if (!arg->var->name) {
 152                                 arg->var->name = malloc(7);
 153                                 snprintf(arg->var->name, 6, "arg%zu", i);
 154                                 arg->var->fqn = strdup(arg->var->name);
 155                         }
 156                         if (!psi_decl_arg_validate(data, arg, type_stack)) {
 157                                 return false;
 158                         }
 159                 }
 160         }
 161
 162         return true;
 163 }
 164
 165 bool psi_decl_is_blacklisted(const char *name)
 166 {
 167         char *blacklisted;
 168         size_t i = 0;
 169
 170         while (psi_plist_get(PSI_G(blacklist).decls, i++, &blacklisted)) {
 171                 if (!fnmatch(blacklisted, name, 0)) {
 172                         return true;
 173                 }
 174         }
 175         return false;
 176 }
 177