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llvm-project/llvm/unittests/CodeGen/DIEHashTest.cpp

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//===- llvm/unittest/CodeGen/DIEHashTest.cpp ------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "../lib/CodeGen/AsmPrinter/DIEHash.h"
#include "TestAsmPrinter.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/CodeGen/DIE.h"
#include "llvm/CodeGen/DwarfStringPoolEntry.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Host.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
// Test fixture
class DIEHashTest : public testing::Test {
public:
BumpPtrAllocator Alloc;
private:
StringMap<DwarfStringPoolEntry> Pool;
std::unique_ptr<TestAsmPrinter> TestPrinter;
void setupTestPrinter() {
auto ExpectedTestPrinter = TestAsmPrinter::create(
sys::getDefaultTargetTriple(), /*DwarfVersion=*/4, dwarf::DWARF32);
ASSERT_THAT_EXPECTED(ExpectedTestPrinter, Succeeded());
TestPrinter = std::move(ExpectedTestPrinter.get());
}
public:
DIEString getString(StringRef S) {
DwarfStringPoolEntry Entry = {nullptr, 1, 1};
return DIEString(DwarfStringPoolEntryRef(
*Pool.insert(std::make_pair(S, Entry)).first, Entry.isIndexed()));
}
AsmPrinter *getAsmPrinter() {
if (!TestPrinter)
setupTestPrinter();
return TestPrinter ? TestPrinter->getAP() : nullptr;
}
};
TEST_F(DIEHashTest, Data1) {
DIEHash Hash;
DIE &Die = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
DIEInteger Size(4);
Die.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Size);
uint64_t MD5Res = Hash.computeTypeSignature(Die);
ASSERT_EQ(0x1AFE116E83701108ULL, MD5Res);
}
// struct {};
TEST_F(DIEHashTest, TrivialType) {
DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger One(1);
Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
// Line and file number are ignored.
Unnamed.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
Unnamed.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
uint64_t MD5Res = DIEHash().computeTypeSignature(Unnamed);
// The exact same hash GCC produces for this DIE.
ASSERT_EQ(0x715305ce6cfd9ad1ULL, MD5Res);
}
// struct foo { };
TEST_F(DIEHashTest, NamedType) {
DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger One(1);
DIEString FooStr = getString("foo");
Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
// The exact same hash GCC produces for this DIE.
ASSERT_EQ(0xd566dbd2ca5265ffULL, MD5Res);
}
// namespace space { struct foo { }; }
TEST_F(DIEHashTest, NamespacedType) {
DIE &CU = *DIE::get(Alloc, dwarf::DW_TAG_compile_unit);
auto Space = DIE::get(Alloc, dwarf::DW_TAG_namespace);
DIEInteger One(1);
DIEString SpaceStr = getString("space");
Space->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, SpaceStr);
// DW_AT_declaration is ignored.
Space->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
One);
// sibling?
auto Foo = DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEString FooStr = getString("foo");
Foo->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
Foo->addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
DIE &N = *Foo;
Space->addChild(std::move(Foo));
CU.addChild(std::move(Space));
uint64_t MD5Res = DIEHash().computeTypeSignature(N);
// The exact same hash GCC produces for this DIE.
ASSERT_EQ(0x7b80381fd17f1e33ULL, MD5Res);
}
// struct { int member; };
TEST_F(DIEHashTest, TypeWithMember) {
DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger Four(4);
Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
DIE &Int = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
DIEString IntStr = getString("int");
Int.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, IntStr);
Int.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
DIEInteger Five(5);
Int.addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, Five);
DIEEntry IntRef(Int);
auto Member = DIE::get(Alloc, dwarf::DW_TAG_member);
DIEString MemberStr = getString("member");
Member->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemberStr);
DIEInteger Zero(0);
Member->addValue(Alloc, dwarf::DW_AT_data_member_location,
dwarf::DW_FORM_data1, Zero);
Member->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntRef);
Unnamed.addChild(std::move(Member));
uint64_t MD5Res = DIEHash().computeTypeSignature(Unnamed);
ASSERT_EQ(0x5646aa436b7e07c6ULL, MD5Res);
}
// struct foo { int mem1, mem2; };
TEST_F(DIEHashTest, ReusedType) {
DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger Eight(8);
Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
DIEInteger Four(4);
DIE &Int = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
DIEString IntStr = getString("int");
Int.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, IntStr);
Int.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
DIEInteger Five(5);
Int.addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, Five);
DIEEntry IntRef(Int);
auto Mem1 = DIE::get(Alloc, dwarf::DW_TAG_member);
DIEString Mem1Str = getString("mem1");
Mem1->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, Mem1Str);
DIEInteger Zero(0);
Mem1->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
Zero);
Mem1->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntRef);
Unnamed.addChild(std::move(Mem1));
auto Mem2 = DIE::get(Alloc, dwarf::DW_TAG_member);
DIEString Mem2Str = getString("mem2");
Mem2->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, Mem2Str);
Mem2->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
Four);
Mem2->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntRef);
Unnamed.addChild(std::move(Mem2));
uint64_t MD5Res = DIEHash().computeTypeSignature(Unnamed);
ASSERT_EQ(0x3a7dc3ed7b76b2f8ULL, MD5Res);
}
// struct foo { static foo f; };
TEST_F(DIEHashTest, RecursiveType) {
DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger One(1);
Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
DIEString FooStr = getString("foo");
Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
DIEString MemStr = getString("mem");
Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
DIEEntry FooRef(Foo);
Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRef);
// DW_AT_external and DW_AT_declaration are ignored anyway, so skip them.
Foo.addChild(std::move(Mem));
uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
ASSERT_EQ(0x73d8b25aef227b06ULL, MD5Res);
}
// struct foo { foo *mem; };
TEST_F(DIEHashTest, Pointer) {
DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger Eight(8);
Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
DIEString FooStr = getString("foo");
Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
DIEString MemStr = getString("mem");
Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
DIEInteger Zero(0);
Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
Zero);
DIE &FooPtr = *DIE::get(Alloc, dwarf::DW_TAG_pointer_type);
FooPtr.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
DIEEntry FooRef(Foo);
FooPtr.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRef);
DIEEntry FooPtrRef(FooPtr);
Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooPtrRef);
Foo.addChild(std::move(Mem));
uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
ASSERT_EQ(0x74ea73862e8708d2ULL, MD5Res);
}
// struct foo { foo &mem; };
TEST_F(DIEHashTest, Reference) {
DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger Eight(8);
Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
DIEString FooStr = getString("foo");
Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
DIEString MemStr = getString("mem");
Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
DIEInteger Zero(0);
Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
Zero);
DIE &FooRef = *DIE::get(Alloc, dwarf::DW_TAG_reference_type);
FooRef.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
DIEEntry FooEntry(Foo);
FooRef.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooEntry);
DIE &FooRefConst = *DIE::get(Alloc, dwarf::DW_TAG_const_type);
DIEEntry FooRefRef(FooRef);
FooRefConst.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
FooRefRef);
DIEEntry FooRefConstRef(FooRefConst);
Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRefConstRef);
Foo.addChild(std::move(Mem));
uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
ASSERT_EQ(0xa0b15f467ad4525bULL, MD5Res);
}
// struct foo { foo &&mem; };
TEST_F(DIEHashTest, RValueReference) {
DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger Eight(8);
Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
DIEString FooStr = getString("foo");
Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
DIEString MemStr = getString("mem");
Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
DIEInteger Zero(0);
Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
Zero);
DIE &FooRef = *DIE::get(Alloc, dwarf::DW_TAG_rvalue_reference_type);
FooRef.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
DIEEntry FooEntry(Foo);
FooRef.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooEntry);
DIE &FooRefConst = *DIE::get(Alloc, dwarf::DW_TAG_const_type);
DIEEntry FooRefRef(FooRef);
FooRefConst.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
FooRefRef);
DIEEntry FooRefConstRef(FooRefConst);
Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRefConstRef);
Foo.addChild(std::move(Mem));
uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
ASSERT_EQ(0xad211c8c3b31e57ULL, MD5Res);
}
// struct foo { foo foo::*mem; };
TEST_F(DIEHashTest, PtrToMember) {
DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger Eight(8);
Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
DIEString FooStr = getString("foo");
Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
DIEString MemStr = getString("mem");
Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
DIEInteger Zero(0);
Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
Zero);
DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
DIEEntry FooEntry(Foo);
PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooEntry);
PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
FooEntry);
DIEEntry PtrToFooMemRef(PtrToFooMem);
Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, PtrToFooMemRef);
Foo.addChild(std::move(Mem));
uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
ASSERT_EQ(0x852e0c9ff7c04ebULL, MD5Res);
}
// Check that the hash for a pointer-to-member matches regardless of whether the
// pointed-to type is a declaration or a definition.
//
// struct bar; // { };
// struct foo { bar foo::*mem; };
TEST_F(DIEHashTest, PtrToMemberDeclDefMatch) {
DIEInteger Zero(0);
DIEInteger One(1);
DIEInteger Eight(8);
DIEString FooStr = getString("foo");
DIEString BarStr = getString("bar");
DIEString MemStr = getString("mem");
uint64_t MD5ResDecl;
{
DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
Bar.addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
One);
DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
dwarf::DW_FORM_data1, Zero);
DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
DIEEntry BarEntry(Bar);
PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
BarEntry);
DIEEntry FooEntry(Foo);
PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
dwarf::DW_FORM_ref4, FooEntry);
DIEEntry PtrToFooMemRef(PtrToFooMem);
Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
PtrToFooMemRef);
Foo.addChild(std::move(Mem));
MD5ResDecl = DIEHash().computeTypeSignature(Foo);
}
uint64_t MD5ResDef;
{
DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
Bar.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
dwarf::DW_FORM_data1, Zero);
DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
DIEEntry BarEntry(Bar);
PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
BarEntry);
DIEEntry FooEntry(Foo);
PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
dwarf::DW_FORM_ref4, FooEntry);
DIEEntry PtrToFooMemRef(PtrToFooMem);
Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
PtrToFooMemRef);
Foo.addChild(std::move(Mem));
MD5ResDef = DIEHash().computeTypeSignature(Foo);
}
ASSERT_EQ(MD5ResDef, MD5ResDecl);
}
// Check that the hash for a pointer-to-member matches regardless of whether the
// pointed-to type is a declaration or a definition.
//
// struct bar; // { };
// struct foo { bar bar::*mem; };
TEST_F(DIEHashTest, PtrToMemberDeclDefMisMatch) {
DIEInteger Zero(0);
DIEInteger One(1);
DIEInteger Eight(8);
DIEString FooStr = getString("foo");
DIEString BarStr = getString("bar");
DIEString MemStr = getString("mem");
uint64_t MD5ResDecl;
{
DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
Bar.addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
One);
DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
dwarf::DW_FORM_data1, Zero);
DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
DIEEntry BarEntry(Bar);
PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
BarEntry);
PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
dwarf::DW_FORM_ref4, BarEntry);
DIEEntry PtrToFooMemRef(PtrToFooMem);
Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
PtrToFooMemRef);
Foo.addChild(std::move(Mem));
MD5ResDecl = DIEHash().computeTypeSignature(Foo);
}
uint64_t MD5ResDef;
{
DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
Bar.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
dwarf::DW_FORM_data1, Zero);
DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
DIEEntry BarEntry(Bar);
PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
BarEntry);
PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
dwarf::DW_FORM_ref4, BarEntry);
DIEEntry PtrToFooMemRef(PtrToFooMem);
Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
PtrToFooMemRef);
Foo.addChild(std::move(Mem));
MD5ResDef = DIEHash().computeTypeSignature(Foo);
}
// FIXME: This seems to be a bug in the DWARF type hashing specification that
// only uses the brief name hashing for types referenced via DW_AT_type. In
// this case the type is referenced via DW_AT_containing_type and full hashing
// causes a hash to differ when the containing type is a declaration in one TU
// and a definition in another.
ASSERT_NE(MD5ResDef, MD5ResDecl);
}
// struct { } a;
// struct foo { decltype(a) mem; };
TEST_F(DIEHashTest, RefUnnamedType) {
DIEInteger Zero(0);
DIEInteger One(1);
DIEInteger Eight(8);
DIEString FooStr = getString("foo");
DIEString MemStr = getString("mem");
DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
Zero);
DIE &UnnamedPtr = *DIE::get(Alloc, dwarf::DW_TAG_pointer_type);
UnnamedPtr.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1,
Eight);
DIEEntry UnnamedRef(Unnamed);
UnnamedPtr.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
UnnamedRef);
DIEEntry UnnamedPtrRef(UnnamedPtr);
Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, UnnamedPtrRef);
Foo.addChild(std::move(Mem));
uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
ASSERT_EQ(0x954e026f01c02529ULL, MD5Res);
}
// struct { struct foo { }; };
TEST_F(DIEHashTest, NestedType) {
DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger One(1);
Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
auto Foo = DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEString FooStr = getString("foo");
Foo->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
Foo->addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
Unnamed.addChild(std::move(Foo));
uint64_t MD5Res = DIEHash().computeTypeSignature(Unnamed);
// The exact same hash GCC produces for this DIE.
ASSERT_EQ(0xde8a3b7b43807f4aULL, MD5Res);
}
// struct { static void func(); };
TEST_F(DIEHashTest, MemberFunc) {
DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger One(1);
Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
auto Func = DIE::get(Alloc, dwarf::DW_TAG_subprogram);
DIEString FuncStr = getString("func");
Func->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FuncStr);
Unnamed.addChild(std::move(Func));
uint64_t MD5Res = DIEHash().computeTypeSignature(Unnamed);
// The exact same hash GCC produces for this DIE.
ASSERT_EQ(0xd36a1b6dfb604ba0ULL, MD5Res);
}
// struct A {
// static void func();
// };
TEST_F(DIEHashTest, MemberFuncFlag) {
DIE &A = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger One(1);
DIEString AStr = getString("A");
A.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, AStr);
A.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
A.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
A.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
auto Func = DIE::get(Alloc, dwarf::DW_TAG_subprogram);
DIEString FuncStr = getString("func");
DIEString FuncLinkage = getString("_ZN1A4funcEv");
DIEInteger Two(2);
Func->addValue(Alloc, dwarf::DW_AT_external, dwarf::DW_FORM_flag_present,
One);
Func->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FuncStr);
Func->addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
Func->addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, Two);
Func->addValue(Alloc, dwarf::DW_AT_linkage_name, dwarf::DW_FORM_strp,
FuncLinkage);
Func->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
One);
A.addChild(std::move(Func));
uint64_t MD5Res = DIEHash().computeTypeSignature(A);
// The exact same hash GCC produces for this DIE.
ASSERT_EQ(0x8f78211ddce3df10ULL, MD5Res);
}
// Derived from:
// struct A {
// const static int PI = -3;
// };
// A a;
TEST_F(DIEHashTest, MemberSdata) {
DIE &A = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger One(1);
DIEString AStr = getString("A");
A.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, AStr);
A.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
A.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
A.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
DIEInteger Four(4);
DIEInteger Five(5);
DIEString FStr = getString("int");
DIE &IntTyDIE = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
IntTyDIE.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
IntTyDIE.addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, Five);
IntTyDIE.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FStr);
DIEEntry IntTy(IntTyDIE);
auto PITyDIE = DIE::get(Alloc, dwarf::DW_TAG_const_type);
PITyDIE->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntTy);
DIEEntry PITy(*PITyDIE);
auto PI = DIE::get(Alloc, dwarf::DW_TAG_member);
DIEString PIStr = getString("PI");
DIEInteger Two(2);
DIEInteger NegThree(-3);
PI->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, PIStr);
PI->addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
PI->addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, Two);
PI->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, PITy);
PI->addValue(Alloc, dwarf::DW_AT_external, dwarf::DW_FORM_flag_present, One);
PI->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
One);
PI->addValue(Alloc, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, NegThree);
A.addChild(std::move(PI));
uint64_t MD5Res = DIEHash().computeTypeSignature(A);
ASSERT_EQ(0x9a216000dd3788a7ULL, MD5Res);
}
// Derived from:
// struct A {
// const static float PI = 3.14;
// };
// A a;
TEST_F(DIEHashTest, MemberBlock) {
if (!this->getAsmPrinter())
GTEST_SKIP();
DIE &A = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
DIEInteger One(1);
DIEString AStr = getString("A");
A.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, AStr);
A.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
A.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
A.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
DIEInteger Four(4);
DIEString FStr = getString("float");
auto FloatTyDIE = DIE::get(Alloc, dwarf::DW_TAG_base_type);
FloatTyDIE->addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1,
Four);
FloatTyDIE->addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
Four);
FloatTyDIE->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FStr);
DIEEntry FloatTy(*FloatTyDIE);
auto PITyDIE = DIE::get(Alloc, dwarf::DW_TAG_const_type);
PITyDIE->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FloatTy);
DIEEntry PITy(*PITyDIE);
auto PI = DIE::get(Alloc, dwarf::DW_TAG_member);
DIEString PIStr = getString("PI");
DIEInteger Two(2);
PI->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, PIStr);
PI->addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
PI->addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, Two);
PI->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, PITy);
PI->addValue(Alloc, dwarf::DW_AT_external, dwarf::DW_FORM_flag_present, One);
PI->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
One);
DIEBlock PIBlock;
DIEInteger Blk1(0xc3);
DIEInteger Blk2(0xf5);
DIEInteger Blk3(0x48);
DIEInteger Blk4(0x40);
PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk1);
PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk2);
PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk3);
PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk4);
PI->addValue(Alloc, dwarf::DW_AT_const_value, dwarf::DW_FORM_block1,
&PIBlock);
A.addChild(std::move(PI));
uint64_t MD5Res = DIEHash(this->getAsmPrinter()).computeTypeSignature(A);
ASSERT_EQ(0x493af53ad3d3f651ULL, MD5Res);
}
}
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