1 //===- llvm/unittest/Support/DynamicLibrary/DynamicLibraryTest.cpp --------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/Support/DynamicLibrary.h" 11 #include "llvm/Config/config.h" 12 #include "llvm/Support/FileSystem.h" 13 #include "llvm/Support/ManagedStatic.h" 14 #include "llvm/Support/Path.h" 15 #include "gtest/gtest.h" 16 17 #include "PipSqueak.h" 18 19 using namespace llvm; 20 using namespace llvm::sys; 21 22 extern "C" PIPSQUEAK_EXPORT const char *TestA() { return "ProcessCall"; } 23 24 std::string LibPath(const std::string Name = "PipSqueak") { 25 const std::vector<testing::internal::string>& Argvs = testing::internal::GetArgvs(); 26 const char *Argv0 = Argvs.size() > 0 ? Argvs[0].c_str() : "DynamicLibraryTests"; 27 void *Ptr = (void*)(intptr_t)TestA; 28 std::string Path = fs::getMainExecutable(Argv0, Ptr); 29 llvm::SmallString<256> Buf(path::parent_path(Path)); 30 path::append(Buf, (Name+".so").c_str()); 31 return Buf.str(); 32 } 33 34 #if defined(_WIN32) || (defined(HAVE_DLFCN_H) && defined(HAVE_DLOPEN)) 35 36 typedef void (*SetStrings)(std::string &GStr, std::string &LStr); 37 typedef void (*TestOrder)(std::vector<std::string> &V); 38 typedef const char *(*GetString)(); 39 40 template <class T> static T FuncPtr(void *Ptr) { 41 union { 42 T F; 43 void *P; 44 } Tmp; 45 Tmp.P = Ptr; 46 return Tmp.F; 47 } 48 template <class T> static void* PtrFunc(T *Func) { 49 union { 50 T *F; 51 void *P; 52 } Tmp; 53 Tmp.F = Func; 54 return Tmp.P; 55 } 56 57 static const char *OverloadTestA() { return "OverloadCall"; } 58 59 std::string StdString(const char *Ptr) { return Ptr ? Ptr : ""; } 60 61 TEST(DynamicLibrary, Overload) { 62 { 63 std::string Err; 64 llvm_shutdown_obj Shutdown; 65 DynamicLibrary DL = 66 DynamicLibrary::getPermanentLibrary(LibPath().c_str(), &Err); 67 EXPECT_TRUE(DL.isValid()); 68 EXPECT_TRUE(Err.empty()); 69 70 GetString GS = FuncPtr<GetString>(DL.getAddressOfSymbol("TestA")); 71 EXPECT_TRUE(GS != nullptr && GS != &TestA); 72 EXPECT_EQ(StdString(GS()), "LibCall"); 73 74 GS = FuncPtr<GetString>(DynamicLibrary::SearchForAddressOfSymbol("TestA")); 75 EXPECT_TRUE(GS != nullptr && GS != &TestA); 76 EXPECT_EQ(StdString(GS()), "LibCall"); 77 78 DL = DynamicLibrary::getPermanentLibrary(nullptr, &Err); 79 EXPECT_TRUE(DL.isValid()); 80 EXPECT_TRUE(Err.empty()); 81 82 GS = FuncPtr<GetString>(DynamicLibrary::SearchForAddressOfSymbol("TestA")); 83 EXPECT_TRUE(GS != nullptr && GS == &TestA); 84 EXPECT_EQ(StdString(GS()), "ProcessCall"); 85 86 GS = FuncPtr<GetString>(DL.getAddressOfSymbol("TestA")); 87 EXPECT_TRUE(GS != nullptr && GS == &TestA); 88 EXPECT_EQ(StdString(GS()), "ProcessCall"); 89 90 DynamicLibrary::AddSymbol("TestA", PtrFunc(&OverloadTestA)); 91 GS = FuncPtr<GetString>(DL.getAddressOfSymbol("TestA")); 92 EXPECT_TRUE(GS != nullptr && GS != &OverloadTestA); 93 94 GS = FuncPtr<GetString>(DynamicLibrary::SearchForAddressOfSymbol("TestA")); 95 EXPECT_TRUE(GS != nullptr && GS == &OverloadTestA); 96 EXPECT_EQ(StdString(GS()), "OverloadCall"); 97 } 98 EXPECT_TRUE(FuncPtr<GetString>(DynamicLibrary::SearchForAddressOfSymbol( 99 "TestA")) == nullptr); 100 } 101 102 TEST(DynamicLibrary, Shutdown) { 103 std::string A("PipSqueak"), B, C("SecondLib"); 104 std::vector<std::string> Order; 105 { 106 std::string Err; 107 llvm_shutdown_obj Shutdown; 108 DynamicLibrary DL = 109 DynamicLibrary::getPermanentLibrary(LibPath(A).c_str(), &Err); 110 EXPECT_TRUE(DL.isValid()); 111 EXPECT_TRUE(Err.empty()); 112 113 SetStrings SS_0 = FuncPtr<SetStrings>( 114 DynamicLibrary::SearchForAddressOfSymbol("SetStrings")); 115 EXPECT_TRUE(SS_0 != nullptr); 116 117 SS_0(A, B); 118 EXPECT_EQ(B, "Local::Local(PipSqueak)"); 119 120 TestOrder TO_0 = FuncPtr<TestOrder>( 121 DynamicLibrary::SearchForAddressOfSymbol("TestOrder")); 122 EXPECT_TRUE(TO_0 != nullptr); 123 124 DynamicLibrary DL2 = 125 DynamicLibrary::getPermanentLibrary(LibPath(C).c_str(), &Err); 126 EXPECT_TRUE(DL2.isValid()); 127 EXPECT_TRUE(Err.empty()); 128 129 // Should find latest version of symbols in SecondLib 130 SetStrings SS_1 = FuncPtr<SetStrings>( 131 DynamicLibrary::SearchForAddressOfSymbol("SetStrings")); 132 EXPECT_TRUE(SS_1 != nullptr); 133 EXPECT_TRUE(SS_0 != SS_1); 134 135 TestOrder TO_1 = FuncPtr<TestOrder>( 136 DynamicLibrary::SearchForAddressOfSymbol("TestOrder")); 137 EXPECT_TRUE(TO_1 != nullptr); 138 EXPECT_TRUE(TO_0 != TO_1); 139 140 B.clear(); 141 SS_1(C, B); 142 EXPECT_EQ(B, "Local::Local(SecondLib)"); 143 144 TO_0(Order); 145 TO_1(Order); 146 } 147 EXPECT_EQ(A, "Global::~Global"); 148 EXPECT_EQ(B, "Local::~Local"); 149 EXPECT_TRUE(FuncPtr<SetStrings>(DynamicLibrary::SearchForAddressOfSymbol( 150 "SetStrings")) == nullptr); 151 152 // Test unload/destruction ordering 153 EXPECT_EQ(Order.size(), 2UL); 154 EXPECT_EQ(Order.front(), "SecondLib"); 155 EXPECT_EQ(Order.back(), "PipSqueak"); 156 } 157 158 #else 159 160 TEST(DynamicLibrary, Unsupported) { 161 std::string Err; 162 DynamicLibrary DL = 163 DynamicLibrary::getPermanentLibrary(LibPath().c_str(), &Err); 164 EXPECT_FALSE(DL.isValid()); 165 EXPECT_EQ(Err, "dlopen() not supported on this platform"); 166 } 167 168 #endif 169