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//===- RTDyldObjectLinkingLayerTest.cpp - RTDyld linking layer unit tests -===//
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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/Orc/RTDyldObjectLinkingLayer.h"
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#include "OrcTestCommon.h"
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#include "llvm/ExecutionEngine/ExecutionEngine.h"
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#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
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#include "llvm/ExecutionEngine/Orc/LambdaResolver.h"
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#include "llvm/ExecutionEngine/Orc/NullResolver.h"
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#include "llvm/ExecutionEngine/SectionMemoryManager.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/LLVMContext.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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using namespace llvm::orc;
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namespace {
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class RTDyldObjectLinkingLayerExecutionTest : public testing::Test,
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public OrcExecutionTest {
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};
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class SectionMemoryManagerWrapper : public SectionMemoryManager {
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public:
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int FinalizationCount = 0;
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int NeedsToReserveAllocationSpaceCount = 0;
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bool needsToReserveAllocationSpace() override {
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++NeedsToReserveAllocationSpaceCount;
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return SectionMemoryManager::needsToReserveAllocationSpace();
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}
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bool finalizeMemory(std::string *ErrMsg = nullptr) override {
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++FinalizationCount;
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return SectionMemoryManager::finalizeMemory(ErrMsg);
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}
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};
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TEST(RTDyldObjectLinkingLayerTest, TestSetProcessAllSections) {
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class MemoryManagerWrapper : public SectionMemoryManager {
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public:
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MemoryManagerWrapper(bool &DebugSeen) : DebugSeen(DebugSeen) {}
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uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
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unsigned SectionID,
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StringRef SectionName,
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bool IsReadOnly) override {
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if (SectionName == ".debug_str")
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DebugSeen = true;
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return SectionMemoryManager::allocateDataSection(Size, Alignment,
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SectionID,
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SectionName,
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IsReadOnly);
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}
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private:
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bool &DebugSeen;
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};
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bool DebugSectionSeen = false;
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auto MM = std::make_shared<MemoryManagerWrapper>(DebugSectionSeen);
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RTDyldObjectLinkingLayer ObjLayer([&MM]() { return MM; });
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LLVMContext Context;
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auto M = llvm::make_unique<Module>("", Context);
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M->setTargetTriple("x86_64-unknown-linux-gnu");
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Type *Int32Ty = IntegerType::get(Context, 32);
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GlobalVariable *GV =
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new GlobalVariable(*M, Int32Ty, false, GlobalValue::ExternalLinkage,
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ConstantInt::get(Int32Ty, 42), "foo");
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GV->setSection(".debug_str");
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// Initialize the native target in case this is the first unit test
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// to try to build a TM.
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OrcNativeTarget::initialize();
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std::unique_ptr<TargetMachine> TM(
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EngineBuilder().selectTarget(Triple(M->getTargetTriple()), "", "",
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SmallVector<std::string, 1>()));
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if (!TM)
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return;
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auto Obj =
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std::make_shared<object::OwningBinary<object::ObjectFile>>(
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SimpleCompiler(*TM)(*M));
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auto Resolver =
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createLambdaResolver(
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[](const std::string &Name) {
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return JITSymbol(nullptr);
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},
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[](const std::string &Name) {
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return JITSymbol(nullptr);
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});
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{
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// Test with ProcessAllSections = false (the default).
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auto H = cantFail(ObjLayer.addObject(Obj, Resolver));
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cantFail(ObjLayer.emitAndFinalize(H));
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EXPECT_EQ(DebugSectionSeen, false)
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<< "Unexpected debug info section";
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cantFail(ObjLayer.removeObject(H));
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}
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{
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// Test with ProcessAllSections = true.
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ObjLayer.setProcessAllSections(true);
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auto H = cantFail(ObjLayer.addObject(Obj, Resolver));
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cantFail(ObjLayer.emitAndFinalize(H));
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EXPECT_EQ(DebugSectionSeen, true)
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<< "Expected debug info section not seen";
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cantFail(ObjLayer.removeObject(H));
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}
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}
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TEST_F(RTDyldObjectLinkingLayerExecutionTest, NoDuplicateFinalization) {
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if (!TM)
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return;
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auto MM = std::make_shared<SectionMemoryManagerWrapper>();
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RTDyldObjectLinkingLayer ObjLayer([&MM]() { return MM; });
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SimpleCompiler Compile(*TM);
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// Create a pair of modules that will trigger recursive finalization:
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// Module 1:
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// int bar() { return 42; }
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// Module 2:
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// int bar();
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// int foo() { return bar(); }
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//
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// Verify that the memory manager is only finalized once (for Module 2).
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// Failure suggests that finalize is being called on the inner RTDyld
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// instance (for Module 1) which is unsafe, as it will prevent relocation of
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// Module 2.
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ModuleBuilder MB1(Context, "", "dummy");
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{
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MB1.getModule()->setDataLayout(TM->createDataLayout());
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Function *BarImpl = MB1.createFunctionDecl<int32_t(void)>("bar");
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BasicBlock *BarEntry = BasicBlock::Create(Context, "entry", BarImpl);
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IRBuilder<> Builder(BarEntry);
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IntegerType *Int32Ty = IntegerType::get(Context, 32);
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Value *FourtyTwo = ConstantInt::getSigned(Int32Ty, 42);
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Builder.CreateRet(FourtyTwo);
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}
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auto Obj1 =
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std::make_shared<object::OwningBinary<object::ObjectFile>>(
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Compile(*MB1.getModule()));
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ModuleBuilder MB2(Context, "", "dummy");
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{
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MB2.getModule()->setDataLayout(TM->createDataLayout());
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Function *BarDecl = MB2.createFunctionDecl<int32_t(void)>("bar");
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Function *FooImpl = MB2.createFunctionDecl<int32_t(void)>("foo");
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BasicBlock *FooEntry = BasicBlock::Create(Context, "entry", FooImpl);
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IRBuilder<> Builder(FooEntry);
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Builder.CreateRet(Builder.CreateCall(BarDecl));
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}
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auto Obj2 =
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std::make_shared<object::OwningBinary<object::ObjectFile>>(
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Compile(*MB2.getModule()));
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auto Resolver =
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createLambdaResolver(
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[&](const std::string &Name) {
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if (auto Sym = ObjLayer.findSymbol(Name, true))
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return Sym;
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return JITSymbol(nullptr);
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},
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[](const std::string &Name) {
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return JITSymbol(nullptr);
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});
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cantFail(ObjLayer.addObject(std::move(Obj1), Resolver));
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auto H = cantFail(ObjLayer.addObject(std::move(Obj2), Resolver));
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cantFail(ObjLayer.emitAndFinalize(H));
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cantFail(ObjLayer.removeObject(H));
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// Finalization of module 2 should trigger finalization of module 1.
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// Verify that finalize on SMMW is only called once.
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EXPECT_EQ(MM->FinalizationCount, 1)
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<< "Extra call to finalize";
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}
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TEST_F(RTDyldObjectLinkingLayerExecutionTest, NoPrematureAllocation) {
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if (!TM)
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return;
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auto MM = std::make_shared<SectionMemoryManagerWrapper>();
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RTDyldObjectLinkingLayer ObjLayer([&MM]() { return MM; });
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SimpleCompiler Compile(*TM);
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// Create a pair of unrelated modules:
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//
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// Module 1:
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// int foo() { return 42; }
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// Module 2:
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// int bar() { return 7; }
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//
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// Both modules will share a memory manager. We want to verify that the
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// second object is not loaded before the first one is finalized. To do this
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// in a portable way, we abuse the
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// RuntimeDyld::MemoryManager::needsToReserveAllocationSpace hook, which is
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// called once per object before any sections are allocated.
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ModuleBuilder MB1(Context, "", "dummy");
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{
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MB1.getModule()->setDataLayout(TM->createDataLayout());
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Function *BarImpl = MB1.createFunctionDecl<int32_t(void)>("foo");
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BasicBlock *BarEntry = BasicBlock::Create(Context, "entry", BarImpl);
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IRBuilder<> Builder(BarEntry);
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IntegerType *Int32Ty = IntegerType::get(Context, 32);
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Value *FourtyTwo = ConstantInt::getSigned(Int32Ty, 42);
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Builder.CreateRet(FourtyTwo);
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}
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auto Obj1 =
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std::make_shared<object::OwningBinary<object::ObjectFile>>(
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Compile(*MB1.getModule()));
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ModuleBuilder MB2(Context, "", "dummy");
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{
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MB2.getModule()->setDataLayout(TM->createDataLayout());
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Function *BarImpl = MB2.createFunctionDecl<int32_t(void)>("bar");
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BasicBlock *BarEntry = BasicBlock::Create(Context, "entry", BarImpl);
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IRBuilder<> Builder(BarEntry);
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IntegerType *Int32Ty = IntegerType::get(Context, 32);
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Value *Seven = ConstantInt::getSigned(Int32Ty, 7);
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Builder.CreateRet(Seven);
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}
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auto Obj2 =
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std::make_shared<object::OwningBinary<object::ObjectFile>>(
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Compile(*MB2.getModule()));
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auto NR = std::make_shared<NullResolver>();
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auto H = cantFail(ObjLayer.addObject(std::move(Obj1), NR));
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cantFail(ObjLayer.addObject(std::move(Obj2), NR));
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cantFail(ObjLayer.emitAndFinalize(H));
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cantFail(ObjLayer.removeObject(H));
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// Only one call to needsToReserveAllocationSpace should have been made.
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EXPECT_EQ(MM->NeedsToReserveAllocationSpaceCount, 1)
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<< "More than one call to needsToReserveAllocationSpace "
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"(multiple unrelated objects loaded prior to finalization)";
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}
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TEST_F(RTDyldObjectLinkingLayerExecutionTest, TestNotifyLoadedSignature) {
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RTDyldObjectLinkingLayer ObjLayer(
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[]() { return nullptr; },
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[](RTDyldObjectLinkingLayer::ObjHandleT,
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const RTDyldObjectLinkingLayer::ObjectPtr &obj,
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const RuntimeDyld::LoadedObjectInfo &info) {});
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}
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} // end anonymous namespace
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