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//===-- PDBFPOProgramToDWARFExpressionTests.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 "gtest/gtest.h"
#include "Plugins/SymbolFile/NativePDB/PdbFPOProgramToDWARFExpression.h"
#include "lldb/Core/StreamBuffer.h"
#include "lldb/Utility/ArchSpec.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/DataExtractor.h"
#include "lldb/Utility/StreamString.h"
#include "llvm/DebugInfo/DWARF/DWARFExpression.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) {
// program translation
StreamBuffer<32> stream(Stream::eBinary, 4, eByteOrderLittle);
ASSERT_TRUE(TranslateFPOProgramToDWARFExpression(
fpo_program, target_register_name, llvm::Triple::x86, stream));
// print dwarf expression to comparable textual representation
llvm::DataExtractor extractor({stream.GetData(), stream.GetSize()},
/*IsLittleEndian=*/true, /*AddressSize=*/4);
std::string result;
llvm::raw_string_ostream os(result);
llvm::DWARFExpression(extractor, /*AddressSize=*/4, llvm::dwarf::DWARF32)
.print(os, nullptr, nullptr);
// actual check
ASSERT_EQ(expected_dwarf_expression, os.str());
}
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");
}
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