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132 lines
4.7 KiB
C++
132 lines
4.7 KiB
C++
//===- ExecutionEngineTest.cpp - Unit tests for ExecutionEngine -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ExecutionEngine/Interpreter.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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class ExecutionEngineTest : public testing::Test {
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protected:
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ExecutionEngineTest() {
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auto Owner = make_unique<Module>("<main>", getGlobalContext());
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M = Owner.get();
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Engine.reset(EngineBuilder(std::move(Owner)).setErrorStr(&Error).create());
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}
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virtual void SetUp() {
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ASSERT_TRUE(Engine.get() != nullptr) << "EngineBuilder returned error: '"
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<< Error << "'";
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}
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GlobalVariable *NewExtGlobal(Type *T, const Twine &Name) {
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return new GlobalVariable(*M, T, false, // Not constant.
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GlobalValue::ExternalLinkage, nullptr, Name);
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}
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std::string Error;
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Module *M; // Owned by ExecutionEngine.
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std::unique_ptr<ExecutionEngine> Engine;
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};
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TEST_F(ExecutionEngineTest, ForwardGlobalMapping) {
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GlobalVariable *G1 =
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NewExtGlobal(Type::getInt32Ty(getGlobalContext()), "Global1");
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int32_t Mem1 = 3;
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Engine->addGlobalMapping(G1, &Mem1);
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EXPECT_EQ(&Mem1, Engine->getPointerToGlobalIfAvailable(G1));
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int32_t Mem2 = 4;
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Engine->updateGlobalMapping(G1, &Mem2);
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EXPECT_EQ(&Mem2, Engine->getPointerToGlobalIfAvailable(G1));
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Engine->updateGlobalMapping(G1, nullptr);
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EXPECT_EQ(nullptr, Engine->getPointerToGlobalIfAvailable(G1));
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Engine->updateGlobalMapping(G1, &Mem2);
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EXPECT_EQ(&Mem2, Engine->getPointerToGlobalIfAvailable(G1));
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GlobalVariable *G2 =
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NewExtGlobal(Type::getInt32Ty(getGlobalContext()), "Global1");
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EXPECT_EQ(nullptr, Engine->getPointerToGlobalIfAvailable(G2))
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<< "The NULL return shouldn't depend on having called"
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<< " updateGlobalMapping(..., NULL)";
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// Check that update...() can be called before add...().
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Engine->updateGlobalMapping(G2, &Mem1);
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EXPECT_EQ(&Mem1, Engine->getPointerToGlobalIfAvailable(G2));
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EXPECT_EQ(&Mem2, Engine->getPointerToGlobalIfAvailable(G1))
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<< "A second mapping shouldn't affect the first.";
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}
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TEST_F(ExecutionEngineTest, ReverseGlobalMapping) {
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GlobalVariable *G1 =
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NewExtGlobal(Type::getInt32Ty(getGlobalContext()), "Global1");
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int32_t Mem1 = 3;
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Engine->addGlobalMapping(G1, &Mem1);
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EXPECT_EQ(G1, Engine->getGlobalValueAtAddress(&Mem1));
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int32_t Mem2 = 4;
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Engine->updateGlobalMapping(G1, &Mem2);
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EXPECT_EQ(nullptr, Engine->getGlobalValueAtAddress(&Mem1));
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EXPECT_EQ(G1, Engine->getGlobalValueAtAddress(&Mem2));
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GlobalVariable *G2 =
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NewExtGlobal(Type::getInt32Ty(getGlobalContext()), "Global2");
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Engine->updateGlobalMapping(G2, &Mem1);
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EXPECT_EQ(G2, Engine->getGlobalValueAtAddress(&Mem1));
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EXPECT_EQ(G1, Engine->getGlobalValueAtAddress(&Mem2));
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Engine->updateGlobalMapping(G1, nullptr);
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EXPECT_EQ(G2, Engine->getGlobalValueAtAddress(&Mem1))
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<< "Removing one mapping doesn't affect a different one.";
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EXPECT_EQ(nullptr, Engine->getGlobalValueAtAddress(&Mem2));
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Engine->updateGlobalMapping(G2, &Mem2);
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EXPECT_EQ(nullptr, Engine->getGlobalValueAtAddress(&Mem1));
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EXPECT_EQ(G2, Engine->getGlobalValueAtAddress(&Mem2))
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<< "Once a mapping is removed, we can point another GV at the"
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<< " now-free address.";
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}
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TEST_F(ExecutionEngineTest, ClearModuleMappings) {
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GlobalVariable *G1 =
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NewExtGlobal(Type::getInt32Ty(getGlobalContext()), "Global1");
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int32_t Mem1 = 3;
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Engine->addGlobalMapping(G1, &Mem1);
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EXPECT_EQ(G1, Engine->getGlobalValueAtAddress(&Mem1));
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Engine->clearGlobalMappingsFromModule(M);
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EXPECT_EQ(nullptr, Engine->getGlobalValueAtAddress(&Mem1));
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GlobalVariable *G2 =
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NewExtGlobal(Type::getInt32Ty(getGlobalContext()), "Global2");
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// After clearing the module mappings, we can assign a new GV to the
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// same address.
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Engine->addGlobalMapping(G2, &Mem1);
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EXPECT_EQ(G2, Engine->getGlobalValueAtAddress(&Mem1));
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}
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TEST_F(ExecutionEngineTest, DestructionRemovesGlobalMapping) {
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GlobalVariable *G1 =
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NewExtGlobal(Type::getInt32Ty(getGlobalContext()), "Global1");
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int32_t Mem1 = 3;
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Engine->addGlobalMapping(G1, &Mem1);
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// Make sure the reverse mapping is enabled.
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EXPECT_EQ(G1, Engine->getGlobalValueAtAddress(&Mem1));
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// When the GV goes away, the ExecutionEngine should remove any
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// mappings that refer to it.
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G1->eraseFromParent();
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EXPECT_EQ(nullptr, Engine->getGlobalValueAtAddress(&Mem1));
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}
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}
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