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0a962314fb
address from the reverse mapping, and add a test that this works now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78127 91177308-0d34-0410-b5e6-96231b3b80d8
93 lines
3.2 KiB
C++
93 lines
3.2 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/DerivedTypes.h"
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#include "llvm/GlobalVariable.h"
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#include "llvm/LLVMContext.h"
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#include "llvm/Module.h"
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/ExecutionEngine/Interpreter.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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: M(new Module("<main>", getGlobalContext())),
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Engine(EngineBuilder(M).create()) {
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}
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virtual void SetUp() {
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ASSERT_TRUE(Engine.get() != NULL);
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}
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GlobalVariable *NewExtGlobal(const Type *T, const Twine &Name) {
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return new GlobalVariable(*M, T, false, // Not constant.
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GlobalValue::ExternalLinkage, NULL, Name);
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}
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Module *const M;
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const OwningPtr<ExecutionEngine> Engine;
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};
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TEST_F(ExecutionEngineTest, ForwardGlobalMapping) {
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GlobalVariable *G1 = NewExtGlobal(Type::Int32Ty, "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, NULL);
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EXPECT_EQ(NULL, 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 = NewExtGlobal(Type::Int32Ty, "Global1");
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EXPECT_EQ(NULL, 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 = NewExtGlobal(Type::Int32Ty, "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(NULL, Engine->getGlobalValueAtAddress(&Mem1));
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EXPECT_EQ(G1, Engine->getGlobalValueAtAddress(&Mem2));
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GlobalVariable *G2 = NewExtGlobal(Type::Int32Ty, "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, NULL);
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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(NULL, Engine->getGlobalValueAtAddress(&Mem2));
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Engine->updateGlobalMapping(G2, &Mem2);
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EXPECT_EQ(NULL, 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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}
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