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1d54402eb3
We may need to do some customization for DWARF unit length in DWARF section headers for some targets for some code generation path. For example, for XCOFF in assembly path, AIX assembler does not require the debug section containing its debug unit length in the header. Move emitDwarfUnitLength to MCStreamer class so that we can do customization in different Streamers Reviewed By: ikudrin Differential Revision: https://reviews.llvm.org/D95932
412 lines
14 KiB
C++
412 lines
14 KiB
C++
//===- llvm/unittest/CodeGen/AsmPrinterDwarfTest.cpp ----------------------===//
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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 "TestAsmPrinter.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCSectionELF.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Testing/Support/Error.h"
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using namespace llvm;
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using testing::_;
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using testing::InSequence;
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using testing::SaveArg;
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namespace {
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class AsmPrinterFixtureBase : public testing::Test {
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void setupTestPrinter(const std::string &TripleStr, unsigned DwarfVersion,
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dwarf::DwarfFormat DwarfFormat) {
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auto ExpectedTestPrinter =
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TestAsmPrinter::create(TripleStr, DwarfVersion, DwarfFormat);
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ASSERT_THAT_EXPECTED(ExpectedTestPrinter, Succeeded());
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TestPrinter = std::move(ExpectedTestPrinter.get());
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}
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protected:
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bool init(const std::string &TripleStr, unsigned DwarfVersion,
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dwarf::DwarfFormat DwarfFormat) {
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setupTestPrinter(TripleStr, DwarfVersion, DwarfFormat);
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return TestPrinter != nullptr;
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}
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std::unique_ptr<TestAsmPrinter> TestPrinter;
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};
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class AsmPrinterEmitDwarfSymbolReferenceTest : public AsmPrinterFixtureBase {
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protected:
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bool init(const std::string &TripleStr, unsigned DwarfVersion,
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dwarf::DwarfFormat DwarfFormat) {
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if (!AsmPrinterFixtureBase::init(TripleStr, DwarfVersion, DwarfFormat))
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return false;
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// Create a symbol which will be emitted in the tests and associate it
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// with a section because that is required in some code paths.
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Val = TestPrinter->getCtx().createTempSymbol();
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Sec = TestPrinter->getCtx().getELFSection(".tst", ELF::SHT_PROGBITS, 0);
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SecBeginSymbol = Sec->getBeginSymbol();
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TestPrinter->getMS().SwitchSection(Sec);
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TestPrinter->getMS().emitLabel(Val);
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return true;
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}
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MCSymbol *Val = nullptr;
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MCSection *Sec = nullptr;
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MCSymbol *SecBeginSymbol = nullptr;
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};
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TEST_F(AsmPrinterEmitDwarfSymbolReferenceTest, COFF) {
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if (!init("x86_64-pc-windows", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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EXPECT_CALL(TestPrinter->getMS(), EmitCOFFSecRel32(Val, 0));
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TestPrinter->getAP()->emitDwarfSymbolReference(Val, false);
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}
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TEST_F(AsmPrinterEmitDwarfSymbolReferenceTest, COFFForceOffset) {
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if (!init("x86_64-pc-windows", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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EXPECT_CALL(TestPrinter->getMS(),
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emitAbsoluteSymbolDiff(Val, SecBeginSymbol, 4));
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TestPrinter->getAP()->emitDwarfSymbolReference(Val, true);
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}
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TEST_F(AsmPrinterEmitDwarfSymbolReferenceTest, ELFDWARF32) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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const MCExpr *Arg0 = nullptr;
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EXPECT_CALL(TestPrinter->getMS(), emitValueImpl(_, 4, _))
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.WillOnce(SaveArg<0>(&Arg0));
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TestPrinter->getAP()->emitDwarfSymbolReference(Val, false);
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const MCSymbolRefExpr *ActualArg0 = dyn_cast_or_null<MCSymbolRefExpr>(Arg0);
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ASSERT_NE(ActualArg0, nullptr);
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EXPECT_EQ(&(ActualArg0->getSymbol()), Val);
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}
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TEST_F(AsmPrinterEmitDwarfSymbolReferenceTest, ELFDWARF32ForceOffset) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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EXPECT_CALL(TestPrinter->getMS(),
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emitAbsoluteSymbolDiff(Val, SecBeginSymbol, 4));
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TestPrinter->getAP()->emitDwarfSymbolReference(Val, true);
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}
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TEST_F(AsmPrinterEmitDwarfSymbolReferenceTest, ELFDWARF64) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF64))
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return;
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const MCExpr *Arg0 = nullptr;
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EXPECT_CALL(TestPrinter->getMS(), emitValueImpl(_, 8, _))
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.WillOnce(SaveArg<0>(&Arg0));
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TestPrinter->getAP()->emitDwarfSymbolReference(Val, false);
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const MCSymbolRefExpr *ActualArg0 = dyn_cast_or_null<MCSymbolRefExpr>(Arg0);
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ASSERT_NE(ActualArg0, nullptr);
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EXPECT_EQ(&(ActualArg0->getSymbol()), Val);
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}
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TEST_F(AsmPrinterEmitDwarfSymbolReferenceTest, ELFDWARF64ForceOffset) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF64))
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return;
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EXPECT_CALL(TestPrinter->getMS(),
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emitAbsoluteSymbolDiff(Val, SecBeginSymbol, 8));
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TestPrinter->getAP()->emitDwarfSymbolReference(Val, true);
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}
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class AsmPrinterEmitDwarfStringOffsetTest : public AsmPrinterFixtureBase {
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protected:
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bool init(const std::string &TripleStr, unsigned DwarfVersion,
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dwarf::DwarfFormat DwarfFormat) {
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if (!AsmPrinterFixtureBase::init(TripleStr, DwarfVersion, DwarfFormat))
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return false;
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Val.Index = DwarfStringPoolEntry::NotIndexed;
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Val.Symbol = TestPrinter->getCtx().createTempSymbol();
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Val.Offset = 42;
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return true;
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}
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DwarfStringPoolEntry Val;
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};
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TEST_F(AsmPrinterEmitDwarfStringOffsetTest, DWARF32) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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const MCExpr *Arg0 = nullptr;
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EXPECT_CALL(TestPrinter->getMS(), emitValueImpl(_, 4, _))
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.WillOnce(SaveArg<0>(&Arg0));
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TestPrinter->getAP()->emitDwarfStringOffset(Val);
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const MCSymbolRefExpr *ActualArg0 = dyn_cast_or_null<MCSymbolRefExpr>(Arg0);
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ASSERT_NE(ActualArg0, nullptr);
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EXPECT_EQ(&(ActualArg0->getSymbol()), Val.Symbol);
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}
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TEST_F(AsmPrinterEmitDwarfStringOffsetTest,
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DWARF32NoRelocationsAcrossSections) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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TestPrinter->setDwarfUsesRelocationsAcrossSections(false);
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EXPECT_CALL(TestPrinter->getMS(), emitIntValue(Val.Offset, 4));
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TestPrinter->getAP()->emitDwarfStringOffset(Val);
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}
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TEST_F(AsmPrinterEmitDwarfStringOffsetTest, DWARF64) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF64))
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return;
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const MCExpr *Arg0 = nullptr;
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EXPECT_CALL(TestPrinter->getMS(), emitValueImpl(_, 8, _))
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.WillOnce(SaveArg<0>(&Arg0));
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TestPrinter->getAP()->emitDwarfStringOffset(Val);
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const MCSymbolRefExpr *ActualArg0 = dyn_cast_or_null<MCSymbolRefExpr>(Arg0);
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ASSERT_NE(ActualArg0, nullptr);
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EXPECT_EQ(&(ActualArg0->getSymbol()), Val.Symbol);
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}
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TEST_F(AsmPrinterEmitDwarfStringOffsetTest,
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DWARF64NoRelocationsAcrossSections) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF64))
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return;
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TestPrinter->setDwarfUsesRelocationsAcrossSections(false);
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EXPECT_CALL(TestPrinter->getMS(), emitIntValue(Val.Offset, 8));
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TestPrinter->getAP()->emitDwarfStringOffset(Val);
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}
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class AsmPrinterEmitDwarfOffsetTest : public AsmPrinterFixtureBase {
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protected:
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bool init(const std::string &TripleStr, unsigned DwarfVersion,
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dwarf::DwarfFormat DwarfFormat) {
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if (!AsmPrinterFixtureBase::init(TripleStr, DwarfVersion, DwarfFormat))
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return false;
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Label = TestPrinter->getCtx().createTempSymbol();
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return true;
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}
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MCSymbol *Label = nullptr;
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uint64_t Offset = 42;
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};
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TEST_F(AsmPrinterEmitDwarfOffsetTest, DWARF32) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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const MCExpr *Arg0 = nullptr;
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EXPECT_CALL(TestPrinter->getMS(), emitValueImpl(_, 4, _))
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.WillOnce(SaveArg<0>(&Arg0));
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TestPrinter->getAP()->emitDwarfOffset(Label, Offset);
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const MCBinaryExpr *ActualArg0 = dyn_cast_or_null<MCBinaryExpr>(Arg0);
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ASSERT_NE(ActualArg0, nullptr);
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EXPECT_EQ(ActualArg0->getOpcode(), MCBinaryExpr::Add);
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const MCSymbolRefExpr *ActualLHS =
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dyn_cast_or_null<MCSymbolRefExpr>(ActualArg0->getLHS());
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ASSERT_NE(ActualLHS, nullptr);
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EXPECT_EQ(&(ActualLHS->getSymbol()), Label);
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const MCConstantExpr *ActualRHS =
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dyn_cast_or_null<MCConstantExpr>(ActualArg0->getRHS());
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ASSERT_NE(ActualRHS, nullptr);
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EXPECT_EQ(static_cast<uint64_t>(ActualRHS->getValue()), Offset);
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}
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TEST_F(AsmPrinterEmitDwarfOffsetTest, DWARF64) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF64))
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return;
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const MCExpr *Arg0 = nullptr;
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EXPECT_CALL(TestPrinter->getMS(), emitValueImpl(_, 8, _))
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.WillOnce(SaveArg<0>(&Arg0));
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TestPrinter->getAP()->emitDwarfOffset(Label, Offset);
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const MCBinaryExpr *ActualArg0 = dyn_cast_or_null<MCBinaryExpr>(Arg0);
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ASSERT_NE(ActualArg0, nullptr);
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EXPECT_EQ(ActualArg0->getOpcode(), MCBinaryExpr::Add);
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const MCSymbolRefExpr *ActualLHS =
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dyn_cast_or_null<MCSymbolRefExpr>(ActualArg0->getLHS());
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ASSERT_NE(ActualLHS, nullptr);
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EXPECT_EQ(&(ActualLHS->getSymbol()), Label);
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const MCConstantExpr *ActualRHS =
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dyn_cast_or_null<MCConstantExpr>(ActualArg0->getRHS());
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ASSERT_NE(ActualRHS, nullptr);
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EXPECT_EQ(static_cast<uint64_t>(ActualRHS->getValue()), Offset);
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}
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class AsmPrinterEmitDwarfLengthOrOffsetTest : public AsmPrinterFixtureBase {
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protected:
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uint64_t Val = 42;
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};
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TEST_F(AsmPrinterEmitDwarfLengthOrOffsetTest, DWARF32) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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EXPECT_CALL(TestPrinter->getMS(), emitIntValue(Val, 4));
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TestPrinter->getAP()->emitDwarfLengthOrOffset(Val);
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}
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TEST_F(AsmPrinterEmitDwarfLengthOrOffsetTest, DWARF64) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF64))
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return;
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EXPECT_CALL(TestPrinter->getMS(), emitIntValue(Val, 8));
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TestPrinter->getAP()->emitDwarfLengthOrOffset(Val);
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}
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class AsmPrinterGetUnitLengthFieldByteSizeTest : public AsmPrinterFixtureBase {
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};
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TEST_F(AsmPrinterGetUnitLengthFieldByteSizeTest, DWARF32) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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EXPECT_EQ(TestPrinter->getAP()->getUnitLengthFieldByteSize(), 4u);
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}
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TEST_F(AsmPrinterGetUnitLengthFieldByteSizeTest, DWARF64) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF64))
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return;
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EXPECT_EQ(TestPrinter->getAP()->getUnitLengthFieldByteSize(), 12u);
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}
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class AsmPrinterEmitDwarfUnitLengthAsIntTest : public AsmPrinterFixtureBase {
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protected:
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uint64_t Val = 42;
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};
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TEST_F(AsmPrinterEmitDwarfUnitLengthAsIntTest, DWARF32) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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EXPECT_CALL(TestPrinter->getMS(), emitIntValue(Val, 4));
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TestPrinter->getAP()->emitDwarfUnitLength(Val, "");
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}
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TEST_F(AsmPrinterEmitDwarfUnitLengthAsIntTest, DWARF64) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF64))
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return;
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InSequence S;
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EXPECT_CALL(TestPrinter->getMS(), emitIntValue(dwarf::DW_LENGTH_DWARF64, 4));
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EXPECT_CALL(TestPrinter->getMS(), emitIntValue(Val, 8));
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TestPrinter->getAP()->emitDwarfUnitLength(Val, "");
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}
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class AsmPrinterEmitDwarfUnitLengthAsHiLoDiffTest
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: public AsmPrinterFixtureBase {
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protected:
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bool init(const std::string &TripleStr, unsigned DwarfVersion,
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dwarf::DwarfFormat DwarfFormat) {
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if (!AsmPrinterFixtureBase::init(TripleStr, DwarfVersion, DwarfFormat))
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return false;
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Hi = TestPrinter->getCtx().createTempSymbol();
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Lo = TestPrinter->getCtx().createTempSymbol();
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return true;
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}
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MCSymbol *Hi = nullptr;
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MCSymbol *Lo = nullptr;
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};
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TEST_F(AsmPrinterEmitDwarfUnitLengthAsHiLoDiffTest, DWARF32) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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EXPECT_CALL(TestPrinter->getMS(), emitAbsoluteSymbolDiff(Hi, Lo, 4));
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TestPrinter->getAP()->emitDwarfUnitLength(Hi, Lo, "");
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}
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TEST_F(AsmPrinterEmitDwarfUnitLengthAsHiLoDiffTest, DWARF64) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF64))
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return;
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InSequence S;
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EXPECT_CALL(TestPrinter->getMS(), emitIntValue(dwarf::DW_LENGTH_DWARF64, 4));
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EXPECT_CALL(TestPrinter->getMS(), emitAbsoluteSymbolDiff(Hi, Lo, 8));
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TestPrinter->getAP()->emitDwarfUnitLength(Hi, Lo, "");
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}
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class AsmPrinterHandlerTest : public AsmPrinterFixtureBase {
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class TestHandler : public AsmPrinterHandler {
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AsmPrinterHandlerTest &Test;
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public:
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TestHandler(AsmPrinterHandlerTest &Test) : Test(Test) {}
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virtual ~TestHandler() {}
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virtual void setSymbolSize(const MCSymbol *Sym, uint64_t Size) override {}
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virtual void beginModule(Module *M) override { Test.BeginCount++; }
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virtual void endModule() override { Test.EndCount++; }
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virtual void beginFunction(const MachineFunction *MF) override {}
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virtual void endFunction(const MachineFunction *MF) override {}
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virtual void beginInstruction(const MachineInstr *MI) override {}
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virtual void endInstruction() override {}
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};
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protected:
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bool init(const std::string &TripleStr, unsigned DwarfVersion,
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dwarf::DwarfFormat DwarfFormat) {
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if (!AsmPrinterFixtureBase::init(TripleStr, DwarfVersion, DwarfFormat))
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return false;
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auto *AP = TestPrinter->getAP();
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AP->addAsmPrinterHandler(AsmPrinter::HandlerInfo(
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std::unique_ptr<AsmPrinterHandler>(new TestHandler(*this)),
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"TestTimerName", "TestTimerDesc", "TestGroupName", "TestGroupDesc"));
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LLVMTargetMachine *LLVMTM = static_cast<LLVMTargetMachine *>(&AP->TM);
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legacy::PassManager PM;
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PM.add(new MachineModuleInfoWrapperPass(LLVMTM));
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PM.add(TestPrinter->releaseAP()); // Takes ownership of destroying AP
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LLVMContext Context;
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std::unique_ptr<Module> M(new Module("TestModule", Context));
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M->setDataLayout(LLVMTM->createDataLayout());
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PM.run(*M);
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// Now check that we can run it twice.
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AP->addAsmPrinterHandler(AsmPrinter::HandlerInfo(
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std::unique_ptr<AsmPrinterHandler>(new TestHandler(*this)),
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"TestTimerName", "TestTimerDesc", "TestGroupName", "TestGroupDesc"));
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PM.run(*M);
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return true;
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}
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int BeginCount = 0;
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int EndCount = 0;
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};
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TEST_F(AsmPrinterHandlerTest, Basic) {
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if (!init("x86_64-pc-linux", /*DwarfVersion=*/4, dwarf::DWARF32))
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return;
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ASSERT_EQ(BeginCount, 3);
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ASSERT_EQ(EndCount, 3);
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}
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} // end namespace
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