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//===- RTDyldObjectLinkingLayerTest.cpp - RTDyld linking layer unit tests -===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/Orc/RTDyldObjectLinkingLayer.h"
#include "OrcTestCommon.h"
#include "llvm/ExecutionEngine/ExecutionEngine.h"
#include "llvm/ExecutionEngine/Orc/CompileUtils.h"
#include "llvm/ExecutionEngine/Orc/LambdaResolver.h"
#include "llvm/ExecutionEngine/Orc/Legacy.h"
#include "llvm/ExecutionEngine/Orc/NullResolver.h"
#include "llvm/ExecutionEngine/SectionMemoryManager.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/LLVMContext.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace llvm::orc;
namespace {
class RTDyldObjectLinkingLayerExecutionTest : public testing::Test,
public OrcExecutionTest {
};
class SectionMemoryManagerWrapper : public SectionMemoryManager {
public:
int FinalizationCount = 0;
int NeedsToReserveAllocationSpaceCount = 0;
bool needsToReserveAllocationSpace() override {
++NeedsToReserveAllocationSpaceCount;
return SectionMemoryManager::needsToReserveAllocationSpace();
}
bool finalizeMemory(std::string *ErrMsg = nullptr) override {
++FinalizationCount;
return SectionMemoryManager::finalizeMemory(ErrMsg);
}
};
TEST(RTDyldObjectLinkingLayerTest, TestSetProcessAllSections) {
class MemoryManagerWrapper : public SectionMemoryManager {
public:
MemoryManagerWrapper(bool &DebugSeen) : DebugSeen(DebugSeen) {}
uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
unsigned SectionID,
StringRef SectionName,
bool IsReadOnly) override {
if (SectionName == ".debug_str")
DebugSeen = true;
return SectionMemoryManager::allocateDataSection(Size, Alignment,
SectionID,
SectionName,
IsReadOnly);
}
private:
bool &DebugSeen;
};
bool DebugSectionSeen = false;
auto MM = std::make_shared<MemoryManagerWrapper>(DebugSectionSeen);
ExecutionSession ES(std::make_shared<SymbolStringPool>());
RTDyldObjectLinkingLayer ObjLayer(ES, [&MM](VModuleKey) {
return RTDyldObjectLinkingLayer::Resources{
MM, std::make_shared<NullResolver>()};
});
LLVMContext Context;
auto M = llvm::make_unique<Module>("", Context);
M->setTargetTriple("x86_64-unknown-linux-gnu");
Type *Int32Ty = IntegerType::get(Context, 32);
GlobalVariable *GV =
new GlobalVariable(*M, Int32Ty, false, GlobalValue::ExternalLinkage,
ConstantInt::get(Int32Ty, 42), "foo");
GV->setSection(".debug_str");
// Initialize the native target in case this is the first unit test
// to try to build a TM.
OrcNativeTarget::initialize();
std::unique_ptr<TargetMachine> TM(
EngineBuilder().selectTarget(Triple(M->getTargetTriple()), "", "",
SmallVector<std::string, 1>()));
if (!TM)
return;
auto Obj = SimpleCompiler(*TM)(*M);
{
// Test with ProcessAllSections = false (the default).
auto K = ES.allocateVModule();
cantFail(ObjLayer.addObject(
K, MemoryBuffer::getMemBufferCopy(Obj->getBuffer())));
cantFail(ObjLayer.emitAndFinalize(K));
EXPECT_EQ(DebugSectionSeen, false)
<< "Unexpected debug info section";
cantFail(ObjLayer.removeObject(K));
}
{
// Test with ProcessAllSections = true.
ObjLayer.setProcessAllSections(true);
auto K = ES.allocateVModule();
cantFail(ObjLayer.addObject(K, std::move(Obj)));
cantFail(ObjLayer.emitAndFinalize(K));
EXPECT_EQ(DebugSectionSeen, true)
<< "Expected debug info section not seen";
cantFail(ObjLayer.removeObject(K));
}
}
TEST_F(RTDyldObjectLinkingLayerExecutionTest, NoDuplicateFinalization) {
if (!SupportsJIT)
return;
ExecutionSession ES(std::make_shared<SymbolStringPool>());
auto MM = std::make_shared<SectionMemoryManagerWrapper>();
std::map<orc::VModuleKey, std::shared_ptr<orc::SymbolResolver>> Resolvers;
RTDyldObjectLinkingLayer ObjLayer(ES, [&](VModuleKey K) {
auto I = Resolvers.find(K);
assert(I != Resolvers.end() && "Missing resolver");
auto R = std::move(I->second);
Resolvers.erase(I);
return RTDyldObjectLinkingLayer::Resources{MM, std::move(R)};
});
SimpleCompiler Compile(*TM);
// Create a pair of modules that will trigger recursive finalization:
// Module 1:
// int bar() { return 42; }
// Module 2:
// int bar();
// int foo() { return bar(); }
//
// Verify that the memory manager is only finalized once (for Module 2).
// Failure suggests that finalize is being called on the inner RTDyld
// instance (for Module 1) which is unsafe, as it will prevent relocation of
// Module 2.
ModuleBuilder MB1(Context, "", "dummy");
{
MB1.getModule()->setDataLayout(TM->createDataLayout());
Function *BarImpl = MB1.createFunctionDecl<int32_t(void)>("bar");
BasicBlock *BarEntry = BasicBlock::Create(Context, "entry", BarImpl);
IRBuilder<> Builder(BarEntry);
IntegerType *Int32Ty = IntegerType::get(Context, 32);
Value *FourtyTwo = ConstantInt::getSigned(Int32Ty, 42);
Builder.CreateRet(FourtyTwo);
}
auto Obj1 = Compile(*MB1.getModule());
ModuleBuilder MB2(Context, "", "dummy");
{
MB2.getModule()->setDataLayout(TM->createDataLayout());
Function *BarDecl = MB2.createFunctionDecl<int32_t(void)>("bar");
Function *FooImpl = MB2.createFunctionDecl<int32_t(void)>("foo");
BasicBlock *FooEntry = BasicBlock::Create(Context, "entry", FooImpl);
IRBuilder<> Builder(FooEntry);
Builder.CreateRet(Builder.CreateCall(BarDecl));
}
auto Obj2 = Compile(*MB2.getModule());
auto K1 = ES.allocateVModule();
Resolvers[K1] = std::make_shared<NullResolver>();
cantFail(ObjLayer.addObject(K1, std::move(Obj1)));
auto K2 = ES.allocateVModule();
auto LegacyLookup = [&](const std::string &Name) {
return ObjLayer.findSymbol(Name, true);
};
Resolvers[K2] = createSymbolResolver(
[&](const SymbolNameSet &Symbols) {
return cantFail(lookupFlagsWithLegacyFn(Symbols, LegacyLookup));
},
[&](std::shared_ptr<AsynchronousSymbolQuery> Query,
const SymbolNameSet &Symbols) {
return lookupWithLegacyFn(ES, *Query, Symbols, LegacyLookup);
});
cantFail(ObjLayer.addObject(K2, std::move(Obj2)));
cantFail(ObjLayer.emitAndFinalize(K2));
cantFail(ObjLayer.removeObject(K2));
// Finalization of module 2 should trigger finalization of module 1.
// Verify that finalize on SMMW is only called once.
EXPECT_EQ(MM->FinalizationCount, 1)
<< "Extra call to finalize";
}
TEST_F(RTDyldObjectLinkingLayerExecutionTest, NoPrematureAllocation) {
if (!SupportsJIT)
return;
ExecutionSession ES(std::make_shared<SymbolStringPool>());
auto MM = std::make_shared<SectionMemoryManagerWrapper>();
RTDyldObjectLinkingLayer ObjLayer(ES, [&MM](VModuleKey K) {
return RTDyldObjectLinkingLayer::Resources{
MM, std::make_shared<NullResolver>()};
});
SimpleCompiler Compile(*TM);
// Create a pair of unrelated modules:
//
// Module 1:
// int foo() { return 42; }
// Module 2:
// int bar() { return 7; }
//
// Both modules will share a memory manager. We want to verify that the
// second object is not loaded before the first one is finalized. To do this
// in a portable way, we abuse the
// RuntimeDyld::MemoryManager::needsToReserveAllocationSpace hook, which is
// called once per object before any sections are allocated.
ModuleBuilder MB1(Context, "", "dummy");
{
MB1.getModule()->setDataLayout(TM->createDataLayout());
Function *BarImpl = MB1.createFunctionDecl<int32_t(void)>("foo");
BasicBlock *BarEntry = BasicBlock::Create(Context, "entry", BarImpl);
IRBuilder<> Builder(BarEntry);
IntegerType *Int32Ty = IntegerType::get(Context, 32);
Value *FourtyTwo = ConstantInt::getSigned(Int32Ty, 42);
Builder.CreateRet(FourtyTwo);
}
auto Obj1 = Compile(*MB1.getModule());
ModuleBuilder MB2(Context, "", "dummy");
{
MB2.getModule()->setDataLayout(TM->createDataLayout());
Function *BarImpl = MB2.createFunctionDecl<int32_t(void)>("bar");
BasicBlock *BarEntry = BasicBlock::Create(Context, "entry", BarImpl);
IRBuilder<> Builder(BarEntry);
IntegerType *Int32Ty = IntegerType::get(Context, 32);
Value *Seven = ConstantInt::getSigned(Int32Ty, 7);
Builder.CreateRet(Seven);
}
auto Obj2 = Compile(*MB2.getModule());
auto K = ES.allocateVModule();
cantFail(ObjLayer.addObject(K, std::move(Obj1)));
cantFail(ObjLayer.addObject(ES.allocateVModule(), std::move(Obj2)));
cantFail(ObjLayer.emitAndFinalize(K));
cantFail(ObjLayer.removeObject(K));
// Only one call to needsToReserveAllocationSpace should have been made.
EXPECT_EQ(MM->NeedsToReserveAllocationSpaceCount, 1)
<< "More than one call to needsToReserveAllocationSpace "
"(multiple unrelated objects loaded prior to finalization)";
}
TEST_F(RTDyldObjectLinkingLayerExecutionTest, TestNotifyLoadedSignature) {
ExecutionSession ES(std::make_shared<SymbolStringPool>());
RTDyldObjectLinkingLayer ObjLayer(
ES,
[](VModuleKey) {
return RTDyldObjectLinkingLayer::Resources{
nullptr, std::make_shared<NullResolver>()};
},
[](VModuleKey, const object::ObjectFile &obj,
const RuntimeDyld::LoadedObjectInfo &info) {});
}
} // end anonymous namespace