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508 lines
17 KiB
C++
508 lines
17 KiB
C++
//===- MCJITTest.cpp - Unit tests for the MCJIT -----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This test suite verifies basic MCJIT functionality when invoked form the C
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// API.
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//
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//===----------------------------------------------------------------------===//
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#include "MCJITTestAPICommon.h"
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#include "llvm-c/Analysis.h"
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#include "llvm-c/Core.h"
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#include "llvm-c/ExecutionEngine.h"
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#include "llvm-c/Target.h"
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#include "llvm-c/Transforms/PassManagerBuilder.h"
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#include "llvm-c/Transforms/Scalar.h"
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#include "llvm/ExecutionEngine/SectionMemoryManager.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Host.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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static bool didCallAllocateCodeSection;
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static bool didAllocateCompactUnwindSection;
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static bool didCallYield;
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static uint8_t *roundTripAllocateCodeSection(void *object, uintptr_t size,
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unsigned alignment,
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unsigned sectionID,
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const char *sectionName) {
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didCallAllocateCodeSection = true;
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return static_cast<SectionMemoryManager*>(object)->allocateCodeSection(
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size, alignment, sectionID, sectionName);
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}
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static uint8_t *roundTripAllocateDataSection(void *object, uintptr_t size,
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unsigned alignment,
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unsigned sectionID,
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const char *sectionName,
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LLVMBool isReadOnly) {
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if (!strcmp(sectionName, "__compact_unwind"))
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didAllocateCompactUnwindSection = true;
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return static_cast<SectionMemoryManager*>(object)->allocateDataSection(
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size, alignment, sectionID, sectionName, isReadOnly);
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}
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static LLVMBool roundTripFinalizeMemory(void *object, char **errMsg) {
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std::string errMsgString;
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bool result =
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static_cast<SectionMemoryManager*>(object)->finalizeMemory(&errMsgString);
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if (result) {
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*errMsg = LLVMCreateMessage(errMsgString.c_str());
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return 1;
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}
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return 0;
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}
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static void roundTripDestroy(void *object) {
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delete static_cast<SectionMemoryManager*>(object);
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}
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static void yield(LLVMContextRef, void *) {
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didCallYield = true;
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}
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namespace {
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// memory manager to test reserve allocation space callback
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class TestReserveAllocationSpaceMemoryManager: public SectionMemoryManager {
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public:
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uintptr_t ReservedCodeSize;
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uintptr_t UsedCodeSize;
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uintptr_t ReservedDataSizeRO;
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uintptr_t UsedDataSizeRO;
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uintptr_t ReservedDataSizeRW;
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uintptr_t UsedDataSizeRW;
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TestReserveAllocationSpaceMemoryManager() :
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ReservedCodeSize(0), UsedCodeSize(0), ReservedDataSizeRO(0),
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UsedDataSizeRO(0), ReservedDataSizeRW(0), UsedDataSizeRW(0) {
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}
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bool needsToReserveAllocationSpace() override { return true; }
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void reserveAllocationSpace(uintptr_t CodeSize, uint32_t CodeAlign,
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uintptr_t DataSizeRO, uint32_t RODataAlign,
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uintptr_t DataSizeRW,
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uint32_t RWDataAlign) override {
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ReservedCodeSize = CodeSize;
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ReservedDataSizeRO = DataSizeRO;
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ReservedDataSizeRW = DataSizeRW;
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}
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void useSpace(uintptr_t* UsedSize, uintptr_t Size, unsigned Alignment) {
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uintptr_t AlignedSize = (Size + Alignment - 1) / Alignment * Alignment;
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uintptr_t AlignedBegin = (*UsedSize + Alignment - 1) / Alignment * Alignment;
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*UsedSize = AlignedBegin + AlignedSize;
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}
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uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
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unsigned SectionID, StringRef SectionName,
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bool IsReadOnly) override {
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useSpace(IsReadOnly ? &UsedDataSizeRO : &UsedDataSizeRW, Size, Alignment);
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return SectionMemoryManager::allocateDataSection(Size, Alignment,
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SectionID, SectionName, IsReadOnly);
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}
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uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
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unsigned SectionID,
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StringRef SectionName) override {
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useSpace(&UsedCodeSize, Size, Alignment);
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return SectionMemoryManager::allocateCodeSection(Size, Alignment,
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SectionID, SectionName);
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}
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};
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class MCJITCAPITest : public testing::Test, public MCJITTestAPICommon {
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protected:
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MCJITCAPITest() {
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// The architectures below are known to be compatible with MCJIT as they
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// are copied from test/ExecutionEngine/MCJIT/lit.local.cfg and should be
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// kept in sync.
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SupportedArchs.push_back(Triple::aarch64);
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SupportedArchs.push_back(Triple::arm);
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SupportedArchs.push_back(Triple::mips);
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SupportedArchs.push_back(Triple::mips64);
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SupportedArchs.push_back(Triple::mips64el);
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SupportedArchs.push_back(Triple::x86);
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SupportedArchs.push_back(Triple::x86_64);
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// Some architectures have sub-architectures in which tests will fail, like
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// ARM. These two vectors will define if they do have sub-archs (to avoid
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// extra work for those who don't), and if so, if they are listed to work
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HasSubArchs.push_back(Triple::arm);
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SupportedSubArchs.push_back("armv6");
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SupportedSubArchs.push_back("armv7");
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// The operating systems below are known to be sufficiently incompatible
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// that they will fail the MCJIT C API tests.
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UnsupportedEnvironments.push_back(Triple::Cygnus);
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}
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void SetUp() override {
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didCallAllocateCodeSection = false;
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didAllocateCompactUnwindSection = false;
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didCallYield = false;
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Module = nullptr;
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Function = nullptr;
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Engine = nullptr;
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Error = nullptr;
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}
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void TearDown() override {
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if (Engine)
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LLVMDisposeExecutionEngine(Engine);
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else if (Module)
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LLVMDisposeModule(Module);
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}
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void buildSimpleFunction() {
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Module = LLVMModuleCreateWithName("simple_module");
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LLVMSetTarget(Module, HostTriple.c_str());
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Function = LLVMAddFunction(Module, "simple_function",
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LLVMFunctionType(LLVMInt32Type(), nullptr,0, 0));
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LLVMSetFunctionCallConv(Function, LLVMCCallConv);
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LLVMBasicBlockRef entry = LLVMAppendBasicBlock(Function, "entry");
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LLVMBuilderRef builder = LLVMCreateBuilder();
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LLVMPositionBuilderAtEnd(builder, entry);
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LLVMBuildRet(builder, LLVMConstInt(LLVMInt32Type(), 42, 0));
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LLVMVerifyModule(Module, LLVMAbortProcessAction, &Error);
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LLVMDisposeMessage(Error);
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LLVMDisposeBuilder(builder);
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}
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void buildFunctionThatUsesStackmap() {
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Module = LLVMModuleCreateWithName("simple_module");
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LLVMSetTarget(Module, HostTriple.c_str());
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LLVMTypeRef stackmapParamTypes[] = { LLVMInt64Type(), LLVMInt32Type() };
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LLVMValueRef stackmap = LLVMAddFunction(
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Module, "llvm.experimental.stackmap",
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LLVMFunctionType(LLVMVoidType(), stackmapParamTypes, 2, 1));
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LLVMSetLinkage(stackmap, LLVMExternalLinkage);
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Function = LLVMAddFunction(Module, "simple_function",
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LLVMFunctionType(LLVMInt32Type(), nullptr, 0, 0));
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LLVMBasicBlockRef entry = LLVMAppendBasicBlock(Function, "entry");
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LLVMBuilderRef builder = LLVMCreateBuilder();
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LLVMPositionBuilderAtEnd(builder, entry);
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LLVMValueRef stackmapArgs[] = {
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LLVMConstInt(LLVMInt64Type(), 0, 0), LLVMConstInt(LLVMInt32Type(), 5, 0),
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LLVMConstInt(LLVMInt32Type(), 42, 0)
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};
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LLVMBuildCall(builder, stackmap, stackmapArgs, 3, "");
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LLVMBuildRet(builder, LLVMConstInt(LLVMInt32Type(), 42, 0));
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LLVMVerifyModule(Module, LLVMAbortProcessAction, &Error);
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LLVMDisposeMessage(Error);
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LLVMDisposeBuilder(builder);
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}
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void buildModuleWithCodeAndData() {
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Module = LLVMModuleCreateWithName("simple_module");
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LLVMSetTarget(Module, HostTriple.c_str());
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// build a global int32 variable initialized to 42.
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LLVMValueRef GlobalVar = LLVMAddGlobal(Module, LLVMInt32Type(), "intVal");
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LLVMSetInitializer(GlobalVar, LLVMConstInt(LLVMInt32Type(), 42, 0));
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{
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Function = LLVMAddFunction(Module, "getGlobal",
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LLVMFunctionType(LLVMInt32Type(), nullptr, 0, 0));
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LLVMSetFunctionCallConv(Function, LLVMCCallConv);
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LLVMBasicBlockRef Entry = LLVMAppendBasicBlock(Function, "entry");
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LLVMBuilderRef Builder = LLVMCreateBuilder();
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LLVMPositionBuilderAtEnd(Builder, Entry);
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LLVMValueRef IntVal = LLVMBuildLoad(Builder, GlobalVar, "intVal");
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LLVMBuildRet(Builder, IntVal);
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LLVMVerifyModule(Module, LLVMAbortProcessAction, &Error);
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LLVMDisposeMessage(Error);
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LLVMDisposeBuilder(Builder);
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}
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{
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LLVMTypeRef ParamTypes[] = { LLVMInt32Type() };
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Function2 = LLVMAddFunction(
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Module, "setGlobal", LLVMFunctionType(LLVMVoidType(), ParamTypes, 1, 0));
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LLVMSetFunctionCallConv(Function2, LLVMCCallConv);
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LLVMBasicBlockRef Entry = LLVMAppendBasicBlock(Function2, "entry");
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LLVMBuilderRef Builder = LLVMCreateBuilder();
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LLVMPositionBuilderAtEnd(Builder, Entry);
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LLVMValueRef Arg = LLVMGetParam(Function2, 0);
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LLVMBuildStore(Builder, Arg, GlobalVar);
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LLVMBuildRetVoid(Builder);
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LLVMVerifyModule(Module, LLVMAbortProcessAction, &Error);
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LLVMDisposeMessage(Error);
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LLVMDisposeBuilder(Builder);
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}
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}
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void buildMCJITOptions() {
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LLVMInitializeMCJITCompilerOptions(&Options, sizeof(Options));
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Options.OptLevel = 2;
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// Just ensure that this field still exists.
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Options.NoFramePointerElim = false;
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}
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void useRoundTripSectionMemoryManager() {
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Options.MCJMM = LLVMCreateSimpleMCJITMemoryManager(
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new SectionMemoryManager(),
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roundTripAllocateCodeSection,
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roundTripAllocateDataSection,
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roundTripFinalizeMemory,
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roundTripDestroy);
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}
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void buildMCJITEngine() {
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ASSERT_EQ(
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0, LLVMCreateMCJITCompilerForModule(&Engine, Module, &Options,
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sizeof(Options), &Error));
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}
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void buildAndRunPasses() {
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LLVMPassManagerRef pass = LLVMCreatePassManager();
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LLVMAddConstantPropagationPass(pass);
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LLVMAddInstructionCombiningPass(pass);
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LLVMRunPassManager(pass, Module);
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LLVMDisposePassManager(pass);
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}
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void buildAndRunOptPasses() {
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LLVMPassManagerBuilderRef passBuilder;
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passBuilder = LLVMPassManagerBuilderCreate();
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LLVMPassManagerBuilderSetOptLevel(passBuilder, 2);
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LLVMPassManagerBuilderSetSizeLevel(passBuilder, 0);
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LLVMPassManagerRef functionPasses =
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LLVMCreateFunctionPassManagerForModule(Module);
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LLVMPassManagerRef modulePasses =
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LLVMCreatePassManager();
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LLVMPassManagerBuilderPopulateFunctionPassManager(passBuilder,
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functionPasses);
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LLVMPassManagerBuilderPopulateModulePassManager(passBuilder, modulePasses);
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LLVMPassManagerBuilderDispose(passBuilder);
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LLVMInitializeFunctionPassManager(functionPasses);
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for (LLVMValueRef value = LLVMGetFirstFunction(Module);
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value; value = LLVMGetNextFunction(value))
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LLVMRunFunctionPassManager(functionPasses, value);
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LLVMFinalizeFunctionPassManager(functionPasses);
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LLVMRunPassManager(modulePasses, Module);
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LLVMDisposePassManager(functionPasses);
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LLVMDisposePassManager(modulePasses);
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}
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LLVMModuleRef Module;
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LLVMValueRef Function;
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LLVMValueRef Function2;
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LLVMMCJITCompilerOptions Options;
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LLVMExecutionEngineRef Engine;
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char *Error;
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};
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} // end anonymous namespace
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TEST_F(MCJITCAPITest, simple_function) {
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SKIP_UNSUPPORTED_PLATFORM;
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buildSimpleFunction();
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buildMCJITOptions();
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buildMCJITEngine();
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buildAndRunPasses();
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auto *functionPointer = reinterpret_cast<int (*)()>(
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reinterpret_cast<uintptr_t>(LLVMGetPointerToGlobal(Engine, Function)));
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EXPECT_EQ(42, functionPointer());
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}
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TEST_F(MCJITCAPITest, gva) {
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SKIP_UNSUPPORTED_PLATFORM;
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Module = LLVMModuleCreateWithName("simple_module");
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LLVMSetTarget(Module, HostTriple.c_str());
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LLVMValueRef GlobalVar = LLVMAddGlobal(Module, LLVMInt32Type(), "simple_value");
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LLVMSetInitializer(GlobalVar, LLVMConstInt(LLVMInt32Type(), 42, 0));
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buildMCJITOptions();
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buildMCJITEngine();
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buildAndRunPasses();
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uint64_t raw = LLVMGetGlobalValueAddress(Engine, "simple_value");
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int32_t *usable = (int32_t *) raw;
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EXPECT_EQ(42, *usable);
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}
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TEST_F(MCJITCAPITest, gfa) {
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SKIP_UNSUPPORTED_PLATFORM;
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buildSimpleFunction();
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buildMCJITOptions();
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buildMCJITEngine();
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buildAndRunPasses();
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uint64_t raw = LLVMGetFunctionAddress(Engine, "simple_function");
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int (*usable)() = (int (*)()) raw;
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EXPECT_EQ(42, usable());
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}
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TEST_F(MCJITCAPITest, custom_memory_manager) {
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SKIP_UNSUPPORTED_PLATFORM;
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buildSimpleFunction();
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buildMCJITOptions();
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useRoundTripSectionMemoryManager();
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buildMCJITEngine();
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buildAndRunPasses();
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auto *functionPointer = reinterpret_cast<int (*)()>(
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reinterpret_cast<uintptr_t>(LLVMGetPointerToGlobal(Engine, Function)));
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EXPECT_EQ(42, functionPointer());
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EXPECT_TRUE(didCallAllocateCodeSection);
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}
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TEST_F(MCJITCAPITest, stackmap_creates_compact_unwind_on_darwin) {
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SKIP_UNSUPPORTED_PLATFORM;
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// This test is also not supported on non-x86 platforms.
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if (Triple(HostTriple).getArch() != Triple::x86_64)
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return;
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buildFunctionThatUsesStackmap();
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buildMCJITOptions();
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useRoundTripSectionMemoryManager();
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buildMCJITEngine();
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buildAndRunOptPasses();
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auto *functionPointer = reinterpret_cast<int (*)()>(
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reinterpret_cast<uintptr_t>(LLVMGetPointerToGlobal(Engine, Function)));
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EXPECT_EQ(42, functionPointer());
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EXPECT_TRUE(didCallAllocateCodeSection);
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// Up to this point, the test is specific only to X86-64. But this next
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// expectation is only valid on Darwin because it assumes that unwind
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// data is made available only through compact_unwind. It would be
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// worthwhile to extend this to handle non-Darwin platforms, in which
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// case you'd want to look for an eh_frame or something.
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//
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// FIXME: Currently, MCJIT relies on a configure-time check to determine which
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// sections to emit. The JIT client should have runtime control over this.
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EXPECT_TRUE(
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Triple(HostTriple).getOS() != Triple::Darwin ||
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Triple(HostTriple).isMacOSXVersionLT(10, 7) ||
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didAllocateCompactUnwindSection);
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}
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TEST_F(MCJITCAPITest, reserve_allocation_space) {
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SKIP_UNSUPPORTED_PLATFORM;
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TestReserveAllocationSpaceMemoryManager* MM = new TestReserveAllocationSpaceMemoryManager();
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buildModuleWithCodeAndData();
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buildMCJITOptions();
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Options.MCJMM = wrap(MM);
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buildMCJITEngine();
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buildAndRunPasses();
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auto GetGlobalFct = reinterpret_cast<int (*)()>(
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reinterpret_cast<uintptr_t>(LLVMGetPointerToGlobal(Engine, Function)));
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auto SetGlobalFct = reinterpret_cast<void (*)(int)>(
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reinterpret_cast<uintptr_t>(LLVMGetPointerToGlobal(Engine, Function2)));
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SetGlobalFct(789);
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EXPECT_EQ(789, GetGlobalFct());
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EXPECT_LE(MM->UsedCodeSize, MM->ReservedCodeSize);
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EXPECT_LE(MM->UsedDataSizeRO, MM->ReservedDataSizeRO);
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EXPECT_LE(MM->UsedDataSizeRW, MM->ReservedDataSizeRW);
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EXPECT_TRUE(MM->UsedCodeSize > 0);
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EXPECT_TRUE(MM->UsedDataSizeRW > 0);
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}
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TEST_F(MCJITCAPITest, yield) {
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SKIP_UNSUPPORTED_PLATFORM;
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buildSimpleFunction();
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buildMCJITOptions();
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buildMCJITEngine();
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LLVMContextRef C = LLVMGetGlobalContext();
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LLVMContextSetYieldCallback(C, yield, nullptr);
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buildAndRunPasses();
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auto *functionPointer = reinterpret_cast<int (*)()>(
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reinterpret_cast<uintptr_t>(LLVMGetPointerToGlobal(Engine, Function)));
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EXPECT_EQ(42, functionPointer());
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EXPECT_TRUE(didCallYield);
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}
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static int localTestFunc() {
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return 42;
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}
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TEST_F(MCJITCAPITest, addGlobalMapping) {
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SKIP_UNSUPPORTED_PLATFORM;
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Module = LLVMModuleCreateWithName("testModule");
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LLVMSetTarget(Module, HostTriple.c_str());
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LLVMTypeRef FunctionType = LLVMFunctionType(LLVMInt32Type(), nullptr, 0, 0);
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LLVMValueRef MappedFn = LLVMAddFunction(Module, "mapped_fn", FunctionType);
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Function = LLVMAddFunction(Module, "test_fn", FunctionType);
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LLVMBasicBlockRef Entry = LLVMAppendBasicBlock(Function, "");
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LLVMBuilderRef Builder = LLVMCreateBuilder();
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LLVMPositionBuilderAtEnd(Builder, Entry);
|
|
LLVMValueRef RetVal = LLVMBuildCall(Builder, MappedFn, nullptr, 0, "");
|
|
LLVMBuildRet(Builder, RetVal);
|
|
LLVMDisposeBuilder(Builder);
|
|
|
|
LLVMVerifyModule(Module, LLVMAbortProcessAction, &Error);
|
|
LLVMDisposeMessage(Error);
|
|
|
|
buildMCJITOptions();
|
|
buildMCJITEngine();
|
|
|
|
LLVMAddGlobalMapping(
|
|
Engine, MappedFn,
|
|
reinterpret_cast<void *>(reinterpret_cast<uintptr_t>(&localTestFunc)));
|
|
|
|
buildAndRunPasses();
|
|
|
|
uint64_t raw = LLVMGetFunctionAddress(Engine, "test_fn");
|
|
int (*usable)() = (int (*)()) raw;
|
|
|
|
EXPECT_EQ(42, usable());
|
|
}
|