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159 lines
7.0 KiB
C++
159 lines
7.0 KiB
C++
//===- DebugTypeODRUniquingTest.cpp - Debug type ODR uniquing tests -------===//
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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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#include "llvm/IR/DebugInfoMetadata.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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namespace {
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TEST(DebugTypeODRUniquingTest, enableDebugTypeODRUniquing) {
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LLVMContext Context;
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EXPECT_FALSE(Context.isODRUniquingDebugTypes());
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Context.enableDebugTypeODRUniquing();
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EXPECT_TRUE(Context.isODRUniquingDebugTypes());
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Context.disableDebugTypeODRUniquing();
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EXPECT_FALSE(Context.isODRUniquingDebugTypes());
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}
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TEST(DebugTypeODRUniquingTest, getODRType) {
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LLVMContext Context;
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MDString &UUID = *MDString::get(Context, "string");
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// Without a type map, this should return null.
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EXPECT_FALSE(DICompositeType::getODRType(
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Context, UUID, dwarf::DW_TAG_class_type, nullptr, nullptr, 0, nullptr,
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nullptr, 0, 0, 0, DINode::FlagZero, nullptr, 0, nullptr, nullptr, nullptr));
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// Enable the mapping. There still shouldn't be a type.
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Context.enableDebugTypeODRUniquing();
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EXPECT_FALSE(DICompositeType::getODRTypeIfExists(Context, UUID));
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// Create some ODR-uniqued type.
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auto &CT = *DICompositeType::getODRType(
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Context, UUID, dwarf::DW_TAG_class_type, nullptr, nullptr, 0, nullptr,
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nullptr, 0, 0, 0, DINode::FlagZero, nullptr, 0, nullptr, nullptr, nullptr);
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EXPECT_EQ(UUID.getString(), CT.getIdentifier());
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// Check that we get it back, even if we change a field.
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EXPECT_EQ(&CT, DICompositeType::getODRTypeIfExists(Context, UUID));
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EXPECT_EQ(&CT, DICompositeType::getODRType(
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Context, UUID, dwarf::DW_TAG_class_type, nullptr, nullptr,
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0, nullptr, nullptr, 0, 0, 0, DINode::FlagZero, nullptr, 0,
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nullptr, nullptr, nullptr));
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EXPECT_EQ(&CT,
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DICompositeType::getODRType(
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Context, UUID, dwarf::DW_TAG_class_type,
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MDString::get(Context, "name"), nullptr, 0, nullptr, nullptr, 0,
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0, 0, DINode::FlagZero, nullptr, 0, nullptr, nullptr, nullptr));
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// Check that it's discarded with the type map.
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Context.disableDebugTypeODRUniquing();
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EXPECT_FALSE(DICompositeType::getODRTypeIfExists(Context, UUID));
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// And it shouldn't magically reappear...
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Context.enableDebugTypeODRUniquing();
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EXPECT_FALSE(DICompositeType::getODRTypeIfExists(Context, UUID));
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}
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TEST(DebugTypeODRUniquingTest, buildODRType) {
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LLVMContext Context;
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Context.enableDebugTypeODRUniquing();
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// Build an ODR type that's a forward decl.
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MDString &UUID = *MDString::get(Context, "Type");
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auto &CT = *DICompositeType::buildODRType(
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Context, UUID, dwarf::DW_TAG_class_type, nullptr, nullptr, 0, nullptr,
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nullptr, 0, 0, 0, DINode::FlagFwdDecl, nullptr, 0, nullptr, nullptr, nullptr);
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EXPECT_EQ(&CT, DICompositeType::getODRTypeIfExists(Context, UUID));
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EXPECT_EQ(dwarf::DW_TAG_class_type, CT.getTag());
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// Update with another forward decl. This should be a no-op.
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EXPECT_EQ(&CT, DICompositeType::buildODRType(
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Context, UUID, dwarf::DW_TAG_structure_type, nullptr, nullptr, 0, nullptr,
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nullptr, 0, 0, 0, DINode::FlagFwdDecl, nullptr, 0, nullptr, nullptr, nullptr));
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EXPECT_EQ(dwarf::DW_TAG_class_type, CT.getTag());
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// Update with a definition. This time we should see a change.
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EXPECT_EQ(&CT, DICompositeType::buildODRType(
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Context, UUID, dwarf::DW_TAG_structure_type, nullptr,
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nullptr, 0, nullptr, nullptr, 0, 0, 0, DINode::FlagZero,
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nullptr, 0, nullptr, nullptr, nullptr));
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EXPECT_EQ(dwarf::DW_TAG_structure_type, CT.getTag());
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// Further updates should be ignored.
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EXPECT_EQ(&CT, DICompositeType::buildODRType(
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Context, UUID, dwarf::DW_TAG_class_type, nullptr, nullptr, 0, nullptr,
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nullptr, 0, 0, 0, DINode::FlagFwdDecl, nullptr, 0, nullptr, nullptr, nullptr));
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EXPECT_EQ(dwarf::DW_TAG_structure_type, CT.getTag());
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EXPECT_EQ(&CT, DICompositeType::buildODRType(
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Context, UUID, dwarf::DW_TAG_class_type, nullptr, nullptr,
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0, nullptr, nullptr, 0, 0, 0, DINode::FlagZero, nullptr, 0,
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nullptr, nullptr, nullptr));
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EXPECT_EQ(dwarf::DW_TAG_structure_type, CT.getTag());
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}
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TEST(DebugTypeODRUniquingTest, buildODRTypeFields) {
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LLVMContext Context;
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Context.enableDebugTypeODRUniquing();
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// Build an ODR type that's a forward decl with no other fields set.
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MDString &UUID = *MDString::get(Context, "UUID");
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auto &CT = *DICompositeType::buildODRType(
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Context, UUID, 0, nullptr, nullptr, 0, nullptr, nullptr, 0, 0, 0,
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DINode::FlagFwdDecl, nullptr, 0, nullptr, nullptr, nullptr);
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// Create macros for running through all the fields except Identifier and Flags.
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#define FOR_EACH_MDFIELD() \
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DO_FOR_FIELD(Name) \
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DO_FOR_FIELD(File) \
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DO_FOR_FIELD(Scope) \
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DO_FOR_FIELD(BaseType) \
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DO_FOR_FIELD(Elements) \
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DO_FOR_FIELD(VTableHolder) \
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DO_FOR_FIELD(TemplateParams)
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#define FOR_EACH_INLINEFIELD() \
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DO_FOR_FIELD(Tag) \
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DO_FOR_FIELD(Line) \
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DO_FOR_FIELD(SizeInBits) \
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DO_FOR_FIELD(AlignInBits) \
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DO_FOR_FIELD(OffsetInBits) \
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DO_FOR_FIELD(RuntimeLang)
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// Create all the fields.
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#define DO_FOR_FIELD(X) auto *X = MDString::get(Context, #X);
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FOR_EACH_MDFIELD();
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#undef DO_FOR_FIELD
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unsigned NonZeroInit = 0;
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#define DO_FOR_FIELD(X) auto X = ++NonZeroInit;
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FOR_EACH_INLINEFIELD();
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#undef DO_FOR_FIELD
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// Replace all the fields with new values that are distinct from each other.
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EXPECT_EQ(&CT,
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DICompositeType::buildODRType(
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Context, UUID, Tag, Name, File, Line, Scope, BaseType,
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SizeInBits, AlignInBits, OffsetInBits, DINode::FlagArtificial,
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Elements, RuntimeLang, VTableHolder, TemplateParams, nullptr));
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// Confirm that all the right fields got updated.
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#define DO_FOR_FIELD(X) EXPECT_EQ(X, CT.getRaw##X());
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FOR_EACH_MDFIELD();
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#undef DO_FOR_FIELD
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#undef FOR_EACH_MDFIELD
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#define DO_FOR_FIELD(X) EXPECT_EQ(X, CT.get##X());
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FOR_EACH_INLINEFIELD();
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#undef DO_FOR_FIELD
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#undef FOR_EACH_INLINEFIELD
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EXPECT_EQ(DINode::FlagArtificial, CT.getFlags());
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EXPECT_EQ(&UUID, CT.getRawIdentifier());
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}
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} // end namespace
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