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 "private/icu.h"
30
31 #include <dirent.h>
32 #include <dlfcn.h>
33 #include <pthread.h>
34 #include <stdlib.h>
35 #include <string.h>
36
37 #include <async_safe/log.h>
38
39 static void* g_libicuuc_handle = nullptr;
40
__find_icu()41 static bool __find_icu() {
42 g_libicuuc_handle = dlopen("libandroidicu.so", RTLD_LOCAL);
43 if (g_libicuuc_handle == nullptr) {
44 async_safe_format_log(ANDROID_LOG_ERROR, "bionic-icu", "couldn't open libandroidicu.so: %s",
45 dlerror());
46 return false;
47 }
48
49 return true;
50 }
51
__find_icu_symbol(const char * symbol_name)52 void* __find_icu_symbol(const char* symbol_name) {
53 static bool found_icu = __find_icu();
54 if (!found_icu) return nullptr;
55
56 char versioned_symbol_name[strlen(symbol_name) + strlen("_android") + 1];
57 snprintf(versioned_symbol_name, sizeof(versioned_symbol_name), "%s_android",
58 symbol_name);
59
60 void* symbol = dlsym(g_libicuuc_handle, versioned_symbol_name);
61 if (symbol == nullptr) {
62 async_safe_format_log(ANDROID_LOG_ERROR, "bionic-icu", "couldn't find %s",
63 versioned_symbol_name);
64 }
65 return symbol;
66 }
67