2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
124 lines
5.2 KiB
C++
124 lines
5.2 KiB
C++
//===- llvm/unittest/DebugInfo/DWARFFormValueTest.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 "llvm/DebugInfo/DWARF/DWARFFormValue.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/Support/Host.h"
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#include "llvm/Support/LEB128.h"
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#include "gtest/gtest.h"
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#include <climits>
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using namespace llvm;
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using namespace dwarf;
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namespace {
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bool isFormClass(dwarf::Form Form, DWARFFormValue::FormClass FC) {
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return DWARFFormValue(Form).isFormClass(FC);
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}
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TEST(DWARFFormValue, FormClass) {
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EXPECT_TRUE(isFormClass(DW_FORM_addr, DWARFFormValue::FC_Address));
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EXPECT_FALSE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_Address));
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EXPECT_TRUE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_Constant));
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EXPECT_TRUE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_SectionOffset));
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EXPECT_TRUE(
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isFormClass(DW_FORM_sec_offset, DWARFFormValue::FC_SectionOffset));
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EXPECT_TRUE(isFormClass(DW_FORM_GNU_str_index, DWARFFormValue::FC_String));
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EXPECT_TRUE(isFormClass(DW_FORM_GNU_addr_index, DWARFFormValue::FC_Address));
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EXPECT_FALSE(isFormClass(DW_FORM_ref_addr, DWARFFormValue::FC_Address));
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EXPECT_TRUE(isFormClass(DW_FORM_ref_addr, DWARFFormValue::FC_Reference));
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EXPECT_TRUE(isFormClass(DW_FORM_ref_sig8, DWARFFormValue::FC_Reference));
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}
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template<typename RawTypeT>
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DWARFFormValue createDataXFormValue(dwarf::Form Form, RawTypeT Value) {
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char Raw[sizeof(RawTypeT)];
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memcpy(Raw, &Value, sizeof(RawTypeT));
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uint32_t Offset = 0;
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DWARFFormValue Result(Form);
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DWARFDataExtractor Data(StringRef(Raw, sizeof(RawTypeT)),
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sys::IsLittleEndianHost, sizeof(void *));
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Result.extractValue(Data, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
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return Result;
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}
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DWARFFormValue createULEBFormValue(uint64_t Value) {
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SmallString<10> RawData;
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raw_svector_ostream OS(RawData);
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encodeULEB128(Value, OS);
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uint32_t Offset = 0;
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DWARFFormValue Result(DW_FORM_udata);
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DWARFDataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void *));
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Result.extractValue(Data, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
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return Result;
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}
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DWARFFormValue createSLEBFormValue(int64_t Value) {
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SmallString<10> RawData;
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raw_svector_ostream OS(RawData);
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encodeSLEB128(Value, OS);
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uint32_t Offset = 0;
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DWARFFormValue Result(DW_FORM_sdata);
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DWARFDataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void *));
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Result.extractValue(Data, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
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return Result;
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}
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TEST(DWARFFormValue, SignedConstantForms) {
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// Check that we correctly sign extend fixed size forms.
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auto Sign1 = createDataXFormValue<uint8_t>(DW_FORM_data1, -123);
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auto Sign2 = createDataXFormValue<uint16_t>(DW_FORM_data2, -12345);
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auto Sign4 = createDataXFormValue<uint32_t>(DW_FORM_data4, -123456789);
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auto Sign8 = createDataXFormValue<uint64_t>(DW_FORM_data8, -1);
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EXPECT_EQ(Sign1.getAsSignedConstant().getValue(), -123);
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EXPECT_EQ(Sign2.getAsSignedConstant().getValue(), -12345);
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EXPECT_EQ(Sign4.getAsSignedConstant().getValue(), -123456789);
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EXPECT_EQ(Sign8.getAsSignedConstant().getValue(), -1);
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// Check that we can handle big positive values, but that we return
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// an error just over the limit.
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auto UMax = createULEBFormValue(LLONG_MAX);
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auto TooBig = createULEBFormValue(uint64_t(LLONG_MAX) + 1);
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EXPECT_EQ(UMax.getAsSignedConstant().getValue(), LLONG_MAX);
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EXPECT_EQ(TooBig.getAsSignedConstant().hasValue(), false);
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// Sanity check some other forms.
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auto Data1 = createDataXFormValue<uint8_t>(DW_FORM_data1, 120);
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auto Data2 = createDataXFormValue<uint16_t>(DW_FORM_data2, 32000);
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auto Data4 = createDataXFormValue<uint32_t>(DW_FORM_data4, 2000000000);
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auto Data8 = createDataXFormValue<uint64_t>(DW_FORM_data8, 0x1234567812345678LL);
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auto LEBMin = createSLEBFormValue(LLONG_MIN);
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auto LEBMax = createSLEBFormValue(LLONG_MAX);
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auto LEB1 = createSLEBFormValue(-42);
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auto LEB2 = createSLEBFormValue(42);
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EXPECT_EQ(Data1.getAsSignedConstant().getValue(), 120);
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EXPECT_EQ(Data2.getAsSignedConstant().getValue(), 32000);
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EXPECT_EQ(Data4.getAsSignedConstant().getValue(), 2000000000);
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EXPECT_EQ(Data8.getAsSignedConstant().getValue(), 0x1234567812345678LL);
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EXPECT_EQ(LEBMin.getAsSignedConstant().getValue(), LLONG_MIN);
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EXPECT_EQ(LEBMax.getAsSignedConstant().getValue(), LLONG_MAX);
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EXPECT_EQ(LEB1.getAsSignedConstant().getValue(), -42);
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EXPECT_EQ(LEB2.getAsSignedConstant().getValue(), 42);
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// Data16 is a little tricky.
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char Cksum[16] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
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DWARFFormValue Data16(DW_FORM_data16);
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DWARFDataExtractor DE16(StringRef(Cksum, 16), sys::IsLittleEndianHost,
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sizeof(void *));
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uint32_t Offset = 0;
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Data16.extractValue(DE16, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
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SmallString<32> Str;
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raw_svector_ostream Res(Str);
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Data16.dump(Res, DIDumpOptions());
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EXPECT_EQ(memcmp(Str.data(), "000102030405060708090a0b0c0d0e0f", 32), 0);
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}
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} // end anonymous namespace
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