dlfcn_test.cpp revision 063525c61d24776094d76971f33920e2a2079530
1acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao/* 2acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * Copyright (C) 2012 The Android Open Source Project 3acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * 4acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * Licensed under the Apache License, Version 2.0 (the "License"); 5acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * you may not use this file except in compliance with the License. 6acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * You may obtain a copy of the License at 7acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * 8acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * http://www.apache.org/licenses/LICENSE-2.0 9acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * 10acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * Unless required by applicable law or agreed to in writing, software 11acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * distributed under the License is distributed on an "AS IS" BASIS, 12acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * See the License for the specific language governing permissions and 14acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao * limitations under the License. 15acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao */ 16acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao 17acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao#include <gtest/gtest.h> 18acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao 19acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao#include <dlfcn.h> 208e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes#include <libgen.h> 218e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes#include <limits.h> 228e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes#include <stdio.h> 238e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes#include <stdint.h> 248e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 258e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes#include <string> 26acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao 273b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes#define ASSERT_SUBSTR(needle, haystack) \ 283b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_PRED_FORMAT2(::testing::IsSubstring, needle, haystack) 293b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes 30acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhaostatic bool gCalled = false; 31acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhaoextern "C" void DlSymTestFunction() { 32acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao gCalled = true; 33acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao} 34acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao 35e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott HughesTEST(dlfcn, dlsym_in_self) { 363b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes dlerror(); // Clear any pending errors. 37acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao void* self = dlopen(NULL, RTLD_NOW); 38acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao ASSERT_TRUE(self != NULL); 393b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_TRUE(dlerror() == NULL); 40acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao 41acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao void* sym = dlsym(self, "DlSymTestFunction"); 42acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao ASSERT_TRUE(sym != NULL); 43acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao 44acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao void (*function)() = reinterpret_cast<void(*)()>(sym); 45acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao 46acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao gCalled = false; 47acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao function(); 48acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao ASSERT_TRUE(gCalled); 491a6961650c82168864afe040dbdc05977db701dfElliott Hughes 501a6961650c82168864afe040dbdc05977db701dfElliott Hughes ASSERT_EQ(0, dlclose(self)); 51acf5aa76a56f101607aeb8e6d1fbea24d0d4f68cjeffhao} 528e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 53e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott HughesTEST(dlfcn, dlopen_failure) { 543b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes void* self = dlopen("/does/not/exist", RTLD_NOW); 553b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_TRUE(self == NULL); 56063525c61d24776094d76971f33920e2a2079530Elliott Hughes#if defined(__BIONIC__) 573b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_STREQ("dlopen failed: library \"/does/not/exist\" not found", dlerror()); 583b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes#else 593b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_STREQ("/does/not/exist: cannot open shared object file: No such file or directory", dlerror()); 603b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes#endif 613b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes} 623b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes 63ad88a0863110798cef5169dcf917e18b967a7cf6Elliott Hughesstatic void* ConcurrentDlErrorFn(void*) { 645419b9474753d25dff947c7740532f86d130c0beElliott Hughes dlopen("/child/thread", RTLD_NOW); 655419b9474753d25dff947c7740532f86d130c0beElliott Hughes return reinterpret_cast<void*>(strdup(dlerror())); 665419b9474753d25dff947c7740532f86d130c0beElliott Hughes} 675419b9474753d25dff947c7740532f86d130c0beElliott Hughes 68e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott HughesTEST(dlfcn, dlerror_concurrent) { 695419b9474753d25dff947c7740532f86d130c0beElliott Hughes dlopen("/main/thread", RTLD_NOW); 705419b9474753d25dff947c7740532f86d130c0beElliott Hughes const char* main_thread_error = dlerror(); 715419b9474753d25dff947c7740532f86d130c0beElliott Hughes ASSERT_SUBSTR("/main/thread", main_thread_error); 725419b9474753d25dff947c7740532f86d130c0beElliott Hughes 735419b9474753d25dff947c7740532f86d130c0beElliott Hughes pthread_t t; 745419b9474753d25dff947c7740532f86d130c0beElliott Hughes ASSERT_EQ(0, pthread_create(&t, NULL, ConcurrentDlErrorFn, NULL)); 755419b9474753d25dff947c7740532f86d130c0beElliott Hughes void* result; 765419b9474753d25dff947c7740532f86d130c0beElliott Hughes ASSERT_EQ(0, pthread_join(t, &result)); 775419b9474753d25dff947c7740532f86d130c0beElliott Hughes char* child_thread_error = static_cast<char*>(result); 785419b9474753d25dff947c7740532f86d130c0beElliott Hughes ASSERT_SUBSTR("/child/thread", child_thread_error); 795419b9474753d25dff947c7740532f86d130c0beElliott Hughes free(child_thread_error); 805419b9474753d25dff947c7740532f86d130c0beElliott Hughes 815419b9474753d25dff947c7740532f86d130c0beElliott Hughes ASSERT_SUBSTR("/main/thread", main_thread_error); 825419b9474753d25dff947c7740532f86d130c0beElliott Hughes} 835419b9474753d25dff947c7740532f86d130c0beElliott Hughes 84e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott HughesTEST(dlfcn, dlsym_failures) { 853b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes dlerror(); // Clear any pending errors. 863b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes void* self = dlopen(NULL, RTLD_NOW); 873b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_TRUE(self != NULL); 883b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_TRUE(dlerror() == NULL); 893b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes 903b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes void* sym; 913b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes 923b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes // NULL handle. 933b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes sym = dlsym(NULL, "test"); 943b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_TRUE(sym == NULL); 95063525c61d24776094d76971f33920e2a2079530Elliott Hughes#if defined(__BIONIC__) 963b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_SUBSTR("dlsym library handle is null", dlerror()); 973b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes#else 983b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_SUBSTR("undefined symbol: test", dlerror()); // glibc isn't specific about the failure. 993b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes#endif 1003b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes 1013b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes // NULL symbol name. 102063525c61d24776094d76971f33920e2a2079530Elliott Hughes#if defined(__BIONIC__) 1033b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes // glibc marks this parameter non-null and SEGVs if you cheat. 1043b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes sym = dlsym(self, NULL); 1053b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_TRUE(sym == NULL); 1063b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_SUBSTR("", dlerror()); 1073b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes#endif 1083b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes 1093b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes // Symbol that doesn't exist. 1103b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes sym = dlsym(self, "ThisSymbolDoesNotExist"); 1113b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_TRUE(sym == NULL); 1123b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_SUBSTR("undefined symbol: ThisSymbolDoesNotExist", dlerror()); 1131a6961650c82168864afe040dbdc05977db701dfElliott Hughes 1141a6961650c82168864afe040dbdc05977db701dfElliott Hughes ASSERT_EQ(0, dlclose(self)); 1153b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes} 1163b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes 117e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott HughesTEST(dlfcn, dladdr) { 1183b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes dlerror(); // Clear any pending errors. 1198e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes void* self = dlopen(NULL, RTLD_NOW); 1208e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes ASSERT_TRUE(self != NULL); 1213b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_TRUE(dlerror() == NULL); 1228e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 1238e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes void* sym = dlsym(self, "DlSymTestFunction"); 1248e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes ASSERT_TRUE(sym != NULL); 1258e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 1268e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes // Deliberately ask dladdr for an address inside a symbol, rather than the symbol base address. 1278e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes void* addr = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(sym) + 2); 1288e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 1298e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes Dl_info info; 1308e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes int rc = dladdr(addr, &info); 1318e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes ASSERT_NE(rc, 0); // Zero on error, non-zero on success. 1328e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 1338e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes // Get the name of this executable. 1348e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes char executable_path[PATH_MAX]; 1358e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes rc = readlink("/proc/self/exe", executable_path, sizeof(executable_path)); 1368e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes ASSERT_NE(rc, -1); 1378e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes executable_path[rc] = '\0'; 1388e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes std::string executable_name(basename(executable_path)); 1398e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 1408e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes // The filename should be that of this executable. 1418e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes // Note that we don't know whether or not we have the full path, so we want an "ends_with" test. 1428e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes std::string dli_fname(info.dli_fname); 1438e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes dli_fname = basename(&dli_fname[0]); 1448e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes ASSERT_EQ(dli_fname, executable_name); 1458e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 1468e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes // The symbol name should be the symbol we looked up. 1478e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes ASSERT_STREQ(info.dli_sname, "DlSymTestFunction"); 1488e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 1498e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes // The address should be the exact address of the symbol. 1508e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes ASSERT_EQ(info.dli_saddr, sym); 1518e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 1528e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes // Look in /proc/pid/maps to find out what address we were loaded at. 1538e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes // TODO: factor /proc/pid/maps parsing out into a class and reuse all over bionic. 1548e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes void* base_address = NULL; 1558e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes char path[PATH_MAX]; 1568e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes snprintf(path, sizeof(path), "/proc/%d/maps", getpid()); 1578e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes char line[BUFSIZ]; 1588e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes FILE* fp = fopen(path, "r"); 1598e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes ASSERT_TRUE(fp != NULL); 1608e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes while (fgets(line, sizeof(line), fp) != NULL) { 1618e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes uintptr_t start = strtoul(line, 0, 16); 1628e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes line[strlen(line) - 1] = '\0'; // Chomp the '\n'. 1638e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes char* path = strchr(line, '/'); 164156da966214957c5616a0b83cc84686eedfc4e31Elliott Hughes if (path != NULL && strcmp(executable_path, path) == 0) { 1658e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes base_address = reinterpret_cast<void*>(start); 1668e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes break; 1678e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes } 1688e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes } 1698e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes fclose(fp); 1708e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 1718e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes // The base address should be the address we were loaded at. 1728e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes ASSERT_EQ(info.dli_fbase, base_address); 1731a6961650c82168864afe040dbdc05977db701dfElliott Hughes 1741a6961650c82168864afe040dbdc05977db701dfElliott Hughes ASSERT_EQ(0, dlclose(self)); 1758e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes} 1768e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 177e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott HughesTEST(dlfcn, dladdr_invalid) { 1788e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes Dl_info info; 1798e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 1803b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes dlerror(); // Clear any pending errors. 1813b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes 1828e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes // No symbol corresponding to NULL. 1838e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes ASSERT_EQ(dladdr(NULL, &info), 0); // Zero on error, non-zero on success. 1843b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_TRUE(dlerror() == NULL); // dladdr(3) doesn't set dlerror(3). 1858e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes 1868e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes // No symbol corresponding to a stack address. 1878e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes ASSERT_EQ(dladdr(&info, &info), 0); // Zero on error, non-zero on success. 1883b297c40794b23d50cb5240f9b03f6ef25fd98dbElliott Hughes ASSERT_TRUE(dlerror() == NULL); // dladdr(3) doesn't set dlerror(3). 1898e15b08ae22a5230c1fea4779410de0420fa939cElliott Hughes} 190124fae9eabd7a25d80dfa8c3b56bed0f0fba16f1Elliott Hughes 191124fae9eabd7a25d80dfa8c3b56bed0f0fba16f1Elliott Hughes// Our dynamic linker doesn't support GNU hash tables. 192a43e906221a3e9c70a66118a8692cd46f77e144eElliott Hughes#if defined(__BIONIC__) 193a43e906221a3e9c70a66118a8692cd46f77e144eElliott Hughes// GNU-style ELF hash tables are incompatible with the MIPS ABI. 194a43e906221a3e9c70a66118a8692cd46f77e144eElliott Hughes// MIPS requires .dynsym to be sorted to match the GOT but GNU-style requires sorting by hash code. 195a43e906221a3e9c70a66118a8692cd46f77e144eElliott Hughes#if !defined(__mips__) 196e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott HughesTEST(dlfcn, dlopen_library_with_only_gnu_hash) { 197124fae9eabd7a25d80dfa8c3b56bed0f0fba16f1Elliott Hughes dlerror(); // Clear any pending errors. 1986e33b0296d23c75bdefa53f0bf0b08c0d877a652Elliott Hughes void* handle = dlopen("no-elf-hash-table-library.so", RTLD_NOW); 199124fae9eabd7a25d80dfa8c3b56bed0f0fba16f1Elliott Hughes ASSERT_TRUE(handle == NULL); 2006e33b0296d23c75bdefa53f0bf0b08c0d877a652Elliott Hughes ASSERT_STREQ("dlopen failed: empty/missing DT_HASH in \"no-elf-hash-table-library.so\" (built with --hash-style=gnu?)", dlerror()); 201124fae9eabd7a25d80dfa8c3b56bed0f0fba16f1Elliott Hughes} 202124fae9eabd7a25d80dfa8c3b56bed0f0fba16f1Elliott Hughes#endif 203a43e906221a3e9c70a66118a8692cd46f77e144eElliott Hughes#endif 204e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes 205e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott HughesTEST(dlfcn, dlopen_bad_flags) { 206e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes dlerror(); // Clear any pending errors. 207e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes void* handle; 208e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes 209063525c61d24776094d76971f33920e2a2079530Elliott Hughes#if defined(__GLIBC__) 210e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes // glibc was smart enough not to define RTLD_NOW as 0, so it can detect missing flags. 211e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes handle = dlopen(NULL, 0); 212e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes ASSERT_TRUE(handle == NULL); 213e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes ASSERT_SUBSTR("invalid", dlerror()); 214e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes#endif 215e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes 216e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes handle = dlopen(NULL, 0xffffffff); 217e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes ASSERT_TRUE(handle == NULL); 218e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes ASSERT_SUBSTR("invalid", dlerror()); 219e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes 220e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes // glibc actually allows you to choose both RTLD_NOW and RTLD_LAZY at the same time, and so do we. 221e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes handle = dlopen(NULL, RTLD_NOW|RTLD_LAZY); 222e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes ASSERT_TRUE(handle != NULL); 223e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes ASSERT_SUBSTR(NULL, dlerror()); 224e66190d2a97a713ae4b4786e60ca3d67ab8aa192Elliott Hughes} 225ebd506c69e12b6dcaf5be94cc8ed1b53af299f9fSergey Melnikov 226ebd506c69e12b6dcaf5be94cc8ed1b53af299f9fSergey MelnikovTEST(dlfcn, rtld_default_unknown_symbol) { 2272ed710976cb0ace31aab565c95a42d4e75623894Elliott Hughes void* addr = dlsym(RTLD_DEFAULT, "ANY_UNKNOWN_SYMBOL_NAME"); 228ebd506c69e12b6dcaf5be94cc8ed1b53af299f9fSergey Melnikov ASSERT_TRUE(addr == NULL); 229ebd506c69e12b6dcaf5be94cc8ed1b53af299f9fSergey Melnikov} 230ebd506c69e12b6dcaf5be94cc8ed1b53af299f9fSergey Melnikov 231ebd506c69e12b6dcaf5be94cc8ed1b53af299f9fSergey MelnikovTEST(dlfcn, rtld_default_known_symbol) { 2322ed710976cb0ace31aab565c95a42d4e75623894Elliott Hughes void* addr = dlsym(RTLD_DEFAULT, "fopen"); 2332ed710976cb0ace31aab565c95a42d4e75623894Elliott Hughes ASSERT_TRUE(addr != NULL); 2342ed710976cb0ace31aab565c95a42d4e75623894Elliott Hughes} 2352ed710976cb0ace31aab565c95a42d4e75623894Elliott Hughes 2362ed710976cb0ace31aab565c95a42d4e75623894Elliott HughesTEST(dlfcn, rtld_next_unknown_symbol) { 2372ed710976cb0ace31aab565c95a42d4e75623894Elliott Hughes void* addr = dlsym(RTLD_NEXT, "ANY_UNKNOWN_SYMBOL_NAME"); 2382ed710976cb0ace31aab565c95a42d4e75623894Elliott Hughes ASSERT_TRUE(addr == NULL); 2392ed710976cb0ace31aab565c95a42d4e75623894Elliott Hughes} 2402ed710976cb0ace31aab565c95a42d4e75623894Elliott Hughes 2412ed710976cb0ace31aab565c95a42d4e75623894Elliott HughesTEST(dlfcn, rtld_next_known_symbol) { 2422ed710976cb0ace31aab565c95a42d4e75623894Elliott Hughes void* addr = dlsym(RTLD_NEXT, "fopen"); 243ebd506c69e12b6dcaf5be94cc8ed1b53af299f9fSergey Melnikov ASSERT_TRUE(addr != NULL); 244ebd506c69e12b6dcaf5be94cc8ed1b53af299f9fSergey Melnikov} 2457db180919c335287b201e859faa8ee0dbe281cdeDmitriy Ivanov 2467db180919c335287b201e859faa8ee0dbe281cdeDmitriy IvanovTEST(dlfcn, dlopen_symlink) { 2477db180919c335287b201e859faa8ee0dbe281cdeDmitriy Ivanov void* handle1 = dlopen("libdlext_test.so", RTLD_NOW); 2487db180919c335287b201e859faa8ee0dbe281cdeDmitriy Ivanov void* handle2 = dlopen("libdlext_test_v2.so", RTLD_NOW); 2497db180919c335287b201e859faa8ee0dbe281cdeDmitriy Ivanov ASSERT_TRUE(handle1 != NULL); 2507db180919c335287b201e859faa8ee0dbe281cdeDmitriy Ivanov ASSERT_TRUE(handle2 != NULL); 2517db180919c335287b201e859faa8ee0dbe281cdeDmitriy Ivanov ASSERT_EQ(handle1, handle2); 2527db180919c335287b201e859faa8ee0dbe281cdeDmitriy Ivanov} 253