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