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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      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
      7  * are met:
      8  *  * Redistributions of source code must retain the above copyright
      9  *    notice, 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
     12  *    the documentation and/or other materials provided with the
     13  *    distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
     19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
     22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include "linker.h"
     30 #include "linker_globals.h"
     31 #include "linker_namespaces.h"
     32 
     33 #include "android-base/stringprintf.h"
     34 
     35 int g_argc = 0;
     36 char** g_argv = nullptr;
     37 char** g_envp = nullptr;
     38 
     39 android_namespace_t g_default_namespace;
     40 
     41 std::unordered_map<uintptr_t, soinfo*> g_soinfo_handles_map;
     42 
     43 static char __linker_dl_err_buf[768];
     44 
     45 char* linker_get_error_buffer() {
     46   return &__linker_dl_err_buf[0];
     47 }
     48 
     49 size_t linker_get_error_buffer_size() {
     50   return sizeof(__linker_dl_err_buf);
     51 }
     52 
     53 void DL_WARN_documented_change(int api_level, const char* doc_link, const char* fmt, ...) {
     54   std::string result{"Warning: "};
     55 
     56   va_list ap;
     57   va_start(ap, fmt);
     58   android::base::StringAppendV(&result, fmt, ap);
     59   va_end(ap);
     60 
     61   android::base::StringAppendF(&result,
     62                                " and will not work when the app moves to API level %d or later "
     63                                "(https://android.googlesource.com/platform/bionic/+/master/%s) "
     64                                "(allowing for now because this app's target API level is still %d)",
     65                                api_level, doc_link, get_application_target_sdk_version());
     66   DL_WARN("%s", result.c_str());
     67 }
     68