Commit f62b898c authored by Oliver Stannard's avatar Oliver Stannard
Browse files

[DebugInfo] Add unit test for compact expression printer 

Add a unit test for the compact DWARF expression printer which will be
used by the llvm-objdump --debug-vars option.

Differential revision: https://reviews.llvm.org/D75250
parent 3a5ddeda

llvm/unittests/DebugInfo/DWARF/CMakeLists.txt

+1 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ add_llvm_unittest(DebugInfoDWARFTests 
  DWARFDebugInfoTest.cpp

  DWARFDebugLineTest.cpp

  DWARFDieTest.cpp

  DWARFExpressionCompactPrinterTest.cpp

  DWARFFormValueTest.cpp

  DWARFLocationExpressionTest.cpp

  )

llvm/unittests/DebugInfo/DWARF/DWARFExpressionCompactPrinterTest.cpp

0 → 100644
+76 −0
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//===- llvm/unittest/DebugInfo/DWARFExpressionCompactPrinterTest.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 "llvm/ADT/ArrayRef.h"

#include "llvm/DebugInfo/DWARF/DWARFContext.h"

#include "llvm/DebugInfo/DWARF/DWARFDie.h"

#include "llvm/DebugInfo/DWARF/DWARFExpression.h"

#include "llvm/MC/MCInstrInfo.h"

#include "llvm/Support/DataExtractor.h"

#include "llvm/Support/TargetRegistry.h"

#include "llvm/Support/TargetSelect.h"

#include "llvm/Testing/Support/Error.h"

#include "gtest/gtest.h"

#include "DwarfGenerator.h"



using namespace llvm;

using namespace dwarf;



namespace {

class DWARFExpressionCompactPrinterTest : public ::testing::Test {

public:

  std::unique_ptr<MCRegisterInfo> MRI;



  DWARFExpressionCompactPrinterTest() {

    InitializeAllTargets();

    InitializeAllTargetMCs();

    InitializeAllAsmPrinters();



    std::string TripleName = "armv8a-linux-gnueabi";

    std::string ErrorStr;



    const Target *TheTarget =

        TargetRegistry::lookupTarget(TripleName, ErrorStr);



    if (!TheTarget)

      return;



    MRI.reset(TheTarget->createMCRegInfo(TripleName));

  }



  void TestExprPrinter(ArrayRef<uint8_t> ExprData, StringRef Expected);

};

} // namespace



void DWARFExpressionCompactPrinterTest::TestExprPrinter(

    ArrayRef<uint8_t> ExprData, StringRef Expected) {

  // If we didn't build ARM, do not run the test.

  if (!MRI)

    return;



  // Print the expression, passing in the subprogram DIE, and check that the

  // result is as expected.

  std::string Result;

  raw_string_ostream OS(Result);

  DataExtractor DE(ExprData, true, 8);

  DWARFExpression Expr(DE, 8);

  Expr.printCompact(OS, *MRI);

  EXPECT_EQ(OS.str(), Expected);

}



TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_reg0) {

  TestExprPrinter({DW_OP_reg0}, "R0");

}



TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_reg10) {

  TestExprPrinter({DW_OP_reg10}, "R10");

}



TEST_F(DWARFExpressionCompactPrinterTest, Test_OP_regx) {

  TestExprPrinter({DW_OP_regx, 0x80, 0x02}, "D0");

}