126 lines
5.2 KiB
C++
126 lines
5.2 KiB
C++
//===- llvm/unittest/DebugInfo/DWARFFormValueTest.cpp ---------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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/Support/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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TEST(DWARFFormValue, FixedFormSizes) {
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// Size of DW_FORM_addr and DW_FORM_ref_addr are equal in DWARF2,
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// DW_FORM_ref_addr is always 4 bytes in DWARF32 starting from DWARF3.
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ArrayRef<uint8_t> sizes = DWARFFormValue::getFixedFormSizes(4, 2);
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EXPECT_EQ(sizes[DW_FORM_addr], sizes[DW_FORM_ref_addr]);
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sizes = DWARFFormValue::getFixedFormSizes(8, 2);
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EXPECT_EQ(sizes[DW_FORM_addr], sizes[DW_FORM_ref_addr]);
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sizes = DWARFFormValue::getFixedFormSizes(8, 3);
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EXPECT_EQ(4, sizes[DW_FORM_ref_addr]);
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// Check that we don't have fixed form sizes for weird address sizes.
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EXPECT_EQ(0U, DWARFFormValue::getFixedFormSizes(16, 2).size());
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}
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bool isFormClass(uint16_t 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(uint16_t 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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DataExtractor Data(StringRef(Raw, sizeof(RawTypeT)),
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sys::IsLittleEndianHost, sizeof(void*));
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Result.extractValue(Data, &Offset, nullptr);
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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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DataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void*));
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Result.extractValue(Data, &Offset, nullptr);
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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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DataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void*));
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Result.extractValue(Data, &Offset, nullptr);
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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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}
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} // end anonymous namespace
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