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//===- lld/unittest/MachOTests/MachONormalizedFileToAtomsTests.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/ReaderWriter/MachO/MachONormalizedFile.h"
#include "lld/Core/Atom.h"
#include "lld/Core/DefinedAtom.h"
#include "lld/Core/File.h"
#include "lld/Core/UndefinedAtom.h"
#include "lld/ReaderWriter/MachOLinkingContext.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/BinaryFormat/MachO.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/YAMLTraits.h"
#include "gtest/gtest.h"
#include <cstdint>
#include <memory>
using namespace lld::mach_o::normalized;
using namespace llvm::MachO;
TEST(ToAtomsTest, empty_obj_x86_64) {
NormalizedFile f;
f.arch = lld::MachOLinkingContext::arch_x86_64;
llvm::Expected<std::unique_ptr<const lld::File>> atom_f =
normalizedToAtoms(f, "", false);
EXPECT_FALSE(!atom_f);
EXPECT_EQ(0U, (*atom_f)->defined().size());
}
TEST(ToAtomsTest, basic_obj_x86_64) {
NormalizedFile f;
f.arch = lld::MachOLinkingContext::arch_x86_64;
Section textSection;
static const uint8_t contentBytes[] = { 0x90, 0xC3, 0xC3, 0xC4 };
const unsigned contentSize = sizeof(contentBytes) / sizeof(contentBytes[0]);
textSection.content = llvm::makeArrayRef(contentBytes, contentSize);
f.sections.push_back(textSection);
Symbol fooSymbol;
fooSymbol.name = "_foo";
fooSymbol.type = N_SECT;
fooSymbol.scope = N_EXT;
fooSymbol.sect = 1;
fooSymbol.value = 0;
f.globalSymbols.push_back(fooSymbol);
Symbol barSymbol;
barSymbol.name = "_bar";
barSymbol.type = N_SECT;
barSymbol.scope = N_EXT;
barSymbol.sect = 1;
barSymbol.value = 2;
f.globalSymbols.push_back(barSymbol);
Symbol undefSym;
undefSym.name = "_undef";
undefSym.type = N_UNDF;
f.undefinedSymbols.push_back(undefSym);
Symbol bazSymbol;
bazSymbol.name = "_baz";
bazSymbol.type = N_SECT;
bazSymbol.scope = N_EXT | N_PEXT;
bazSymbol.sect = 1;
bazSymbol.value = 3;
f.localSymbols.push_back(bazSymbol);
llvm::Expected<std::unique_ptr<const lld::File>> atom_f =
normalizedToAtoms(f, "", false);
EXPECT_FALSE(!atom_f);
const lld::File &file = **atom_f;
EXPECT_EQ(3U, file.defined().size());
auto it = file.defined().begin();
const lld::DefinedAtom *atom1 = *it;
++it;
const lld::DefinedAtom *atom2 = *it;
++it;
const lld::DefinedAtom *atom3 = *it;
const lld::UndefinedAtom *atom4 = *file.undefined().begin();
EXPECT_TRUE(atom1->name().equals("_foo"));
EXPECT_EQ(2U, atom1->rawContent().size());
EXPECT_EQ(0x90, atom1->rawContent()[0]);
EXPECT_EQ(0xC3, atom1->rawContent()[1]);
EXPECT_EQ(lld::Atom::scopeGlobal, atom1->scope());
EXPECT_TRUE(atom2->name().equals("_bar"));
EXPECT_EQ(1U, atom2->rawContent().size());
EXPECT_EQ(0xC3, atom2->rawContent()[0]);
EXPECT_EQ(lld::Atom::scopeGlobal, atom2->scope());
EXPECT_TRUE(atom3->name().equals("_baz"));
EXPECT_EQ(1U, atom3->rawContent().size());
EXPECT_EQ(0xC4, atom3->rawContent()[0]);
EXPECT_EQ(lld::Atom::scopeLinkageUnit, atom3->scope());
EXPECT_TRUE(atom4->name().equals("_undef"));
EXPECT_EQ(lld::Atom::definitionUndefined, atom4->definition());
}
TEST(ToAtomsTest, reservedUnitLength) {
static const uint8_t debugInfoWithReservedLengthContent[12] = {
0xf0, 0xff, 0xff, 0xff // Reserved length value
};
static const uint8_t debugInfoWithValidBigLengthContent[12] = {
0xef, 0xff, 0xff, 0xff, // The maximum valid length value for DWARF32
0x00, 0x00 // Wrong version
};
static const uint8_t dummyContent[] = {0x00};
NormalizedFile fReservedLength, fValidBigLength;
fReservedLength.arch = lld::MachOLinkingContext::arch_x86;
fValidBigLength.arch = lld::MachOLinkingContext::arch_x86;
Section section;
section.segmentName = "__DWARF";
section.sectionName = "__debug_info";
section.content = llvm::makeArrayRef(debugInfoWithReservedLengthContent);
fReservedLength.sections.push_back(section);
section.content = llvm::makeArrayRef(debugInfoWithValidBigLengthContent);
fValidBigLength.sections.push_back(section);
section.sectionName = "__debug_abbrev";
section.content = llvm::makeArrayRef(dummyContent);
fReservedLength.sections.push_back(section);
fValidBigLength.sections.push_back(section);
section.sectionName = "__debug_str";
fReservedLength.sections.push_back(section);
fValidBigLength.sections.push_back(section);
auto resultReservedLength = normalizedToAtoms(fReservedLength, "foo", false);
auto resultValidBigLength = normalizedToAtoms(fValidBigLength, "foo", false);
// Both cases should return errors, but different.
ASSERT_FALSE(resultReservedLength);
ASSERT_FALSE(resultValidBigLength);
EXPECT_STREQ("Malformed DWARF in foo",
toString(resultReservedLength.takeError()).c_str());
EXPECT_STREQ("Unsupported DWARF version in foo",
toString(resultValidBigLength.takeError()).c_str());
}
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