reference, declaration → definition
definition → references, declarations, derived classes, virtual overrides
reference to multiple definitions → definitions
unreferenced

    1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129
  130
  131
  132
  133
  134
  135
  136
  137
  138
  139

//===-- PDBFPOProgramToDWARFExpressionTests.cpp -----------------*- C++ -*-===//
//
// 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 "gtest/gtest.h"

#include "Plugins/SymbolFile/NativePDB/PdbFPOProgramToDWARFExpression.h"

#include "lldb/Core/StreamBuffer.h"
#include "lldb/Expression/DWARFExpression.h"
#include "lldb/Utility/ArchSpec.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/DataExtractor.h"
#include "lldb/Utility/StreamString.h"

using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::npdb;

/// Valid programs tests

static void
CheckValidProgramTranslation(llvm::StringRef fpo_program,
                             llvm::StringRef target_register_name,
                             llvm::StringRef expected_dwarf_expression) {
  // initial setup
  ArchSpec arch_spec("i686-pc-windows");
  llvm::Triple::ArchType arch_type = arch_spec.GetMachine();
  ByteOrder byte_order = arch_spec.GetByteOrder();
  uint32_t address_size = arch_spec.GetAddressByteSize();
  uint32_t byte_size = arch_spec.GetDataByteSize();

  // program translation
  StreamBuffer<32> stream(Stream::eBinary, address_size, byte_order);
  ASSERT_TRUE(TranslateFPOProgramToDWARFExpression(
      fpo_program, target_register_name, arch_type, stream));

  // print dwarf expression to comparable textual representation
  DataBufferSP buffer =
      std::make_shared<DataBufferHeap>(stream.GetData(), stream.GetSize());
  DataExtractor extractor(buffer, byte_order, address_size, byte_size);

  StreamString result_dwarf_expression;
  ASSERT_TRUE(DWARFExpression::PrintDWARFExpression(
      result_dwarf_expression, extractor, address_size, 4, false));

  // actual check
  ASSERT_STREQ(expected_dwarf_expression.data(),
               result_dwarf_expression.GetString().data());
}

TEST(PDBFPOProgramToDWARFExpressionTests, SingleAssignmentRegisterRef) {
  CheckValidProgramTranslation("$T0 $ebp = ", "$T0", "DW_OP_breg6 +0");
}

TEST(PDBFPOProgramToDWARFExpressionTests, MultipleIndependentAssignments) {
  CheckValidProgramTranslation("$T1 1 = $T0 0 =", "$T0", "DW_OP_consts +0");
}

TEST(PDBFPOProgramToDWARFExpressionTests, MultipleDependentAssignments) {
  CheckValidProgramTranslation(
      "$T1 $ebp 4 + = $T0 $T1 8 - 128 @ = ", "$T0",
      "DW_OP_breg6 +0, DW_OP_consts +4, DW_OP_plus , DW_OP_consts +8, "
      "DW_OP_minus , DW_OP_consts +128, DW_OP_lit1 , DW_OP_minus , DW_OP_not , "
      "DW_OP_and ");
}

TEST(PDBFPOProgramToDWARFExpressionTests, DependencyChain) {
  CheckValidProgramTranslation("$T1 0 = $T0 $T1 = $ebp $T0 =", "$ebp",
                               "DW_OP_consts +0");
}

/// Invalid programs tests
static void
CheckInvalidProgramTranslation(llvm::StringRef fpo_program,
                               llvm::StringRef target_register_name) {
  // initial setup
  ArchSpec arch_spec("i686-pc-windows");
  llvm::Triple::ArchType arch_type = arch_spec.GetMachine();
  ByteOrder byte_order = arch_spec.GetByteOrder();
  uint32_t address_size = arch_spec.GetAddressByteSize();

  // program translation
  StreamBuffer<32> stream(Stream::eBinary, address_size, byte_order);
  EXPECT_FALSE(TranslateFPOProgramToDWARFExpression(
      fpo_program, target_register_name, arch_type, stream));
  EXPECT_EQ((size_t)0, stream.GetSize());
}

TEST(PDBFPOProgramToDWARFExpressionTests, InvalidAssignmentSingle) {
  CheckInvalidProgramTranslation("$T0 0", "$T0");
}

TEST(PDBFPOProgramToDWARFExpressionTests, InvalidAssignmentMultiple) {
  CheckInvalidProgramTranslation("$T1 0 = $T0 0", "$T0");
}

TEST(PDBFPOProgramToDWARFExpressionTests, UnknownOp) {
  CheckInvalidProgramTranslation("$T0 $ebp 0 & = ", "$T0");
}

TEST(PDBFPOProgramToDWARFExpressionTests, InvalidOpBinary) {
  CheckInvalidProgramTranslation("$T0 0 + = ", "$T0");
}

TEST(PDBFPOProgramToDWARFExpressionTests, InvalidOpUnary) {
  CheckInvalidProgramTranslation("$T0 ^ = ", "$T0");
}

TEST(PDBFPOProgramToDWARFExpressionTests, MissingTargetRegister) {
  CheckInvalidProgramTranslation("$T1 0 = ", "$T0");
}

TEST(PDBFPOProgramToDWARFExpressionTests, UnresolvedRegisterReference) {
  CheckInvalidProgramTranslation("$T0 $abc = ", "$T0");
}

TEST(PDBFPOProgramToDWARFExpressionTests,
     UnresolvedRegisterAssignmentReference) {
  CheckInvalidProgramTranslation("$T2 0 = $T0 $T1 = ", "$T0");
}

TEST(PDBFPOProgramToDWARFExpressionTests,
     UnresolvedCyclicRegisterAssignmentReference) {
  CheckInvalidProgramTranslation("$T1 $T0 = $T0 $T1 = ", "$T0");
}

TEST(PDBFPOProgramToDWARFExpressionTests,
     UnresolvedDependentCyclicRegisterAssignmentReference) {
  CheckInvalidProgramTranslation("$T1 $T0 = $T0 $T1 = $T2 $T1 =", "$T2");
}

TEST(PDBFPOProgramToDWARFExpressionTests, UnsupportedRASearch) {
  CheckInvalidProgramTranslation("$T0 .raSearch = ", "$T0");
}