1//===- llvm/unittest/DebugInfo/DWARFFormValueTest.cpp ---------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10#include "llvm/DebugInfo/DWARF/DWARFFormValue.h" 11#include "llvm/ADT/SmallString.h" 12#include "llvm/Support/Dwarf.h" 13#include "llvm/Support/Host.h" 14#include "llvm/Support/LEB128.h" 15#include "gtest/gtest.h" 16#include <climits> 17using namespace llvm; 18using namespace dwarf; 19 20namespace { 21 22TEST(DWARFFormValue, FixedFormSizes) { 23 // Size of DW_FORM_addr and DW_FORM_ref_addr are equal in DWARF2, 24 // DW_FORM_ref_addr is always 4 bytes in DWARF32 starting from DWARF3. 25 ArrayRef<uint8_t> sizes = DWARFFormValue::getFixedFormSizes(4, 2); 26 EXPECT_EQ(sizes[DW_FORM_addr], sizes[DW_FORM_ref_addr]); 27 sizes = DWARFFormValue::getFixedFormSizes(8, 2); 28 EXPECT_EQ(sizes[DW_FORM_addr], sizes[DW_FORM_ref_addr]); 29 sizes = DWARFFormValue::getFixedFormSizes(8, 3); 30 EXPECT_EQ(4, sizes[DW_FORM_ref_addr]); 31 // Check that we don't have fixed form sizes for weird address sizes. 32 EXPECT_EQ(0U, DWARFFormValue::getFixedFormSizes(16, 2).size()); 33} 34 35bool isFormClass(uint16_t Form, DWARFFormValue::FormClass FC) { 36 return DWARFFormValue(Form).isFormClass(FC); 37} 38 39TEST(DWARFFormValue, FormClass) { 40 EXPECT_TRUE(isFormClass(DW_FORM_addr, DWARFFormValue::FC_Address)); 41 EXPECT_FALSE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_Address)); 42 EXPECT_TRUE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_Constant)); 43 EXPECT_TRUE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_SectionOffset)); 44 EXPECT_TRUE( 45 isFormClass(DW_FORM_sec_offset, DWARFFormValue::FC_SectionOffset)); 46 EXPECT_TRUE(isFormClass(DW_FORM_GNU_str_index, DWARFFormValue::FC_String)); 47 EXPECT_TRUE(isFormClass(DW_FORM_GNU_addr_index, DWARFFormValue::FC_Address)); 48 EXPECT_FALSE(isFormClass(DW_FORM_ref_addr, DWARFFormValue::FC_Address)); 49 EXPECT_TRUE(isFormClass(DW_FORM_ref_addr, DWARFFormValue::FC_Reference)); 50 EXPECT_TRUE(isFormClass(DW_FORM_ref_sig8, DWARFFormValue::FC_Reference)); 51} 52 53template<typename RawTypeT> 54DWARFFormValue createDataXFormValue(uint16_t Form, RawTypeT Value) { 55 char Raw[sizeof(RawTypeT)]; 56 memcpy(Raw, &Value, sizeof(RawTypeT)); 57 uint32_t Offset = 0; 58 DWARFFormValue Result(Form); 59 DataExtractor Data(StringRef(Raw, sizeof(RawTypeT)), 60 sys::IsLittleEndianHost, sizeof(void*)); 61 Result.extractValue(Data, &Offset, nullptr); 62 return Result; 63} 64 65DWARFFormValue createULEBFormValue(uint64_t Value) { 66 SmallString<10> RawData; 67 raw_svector_ostream OS(RawData); 68 encodeULEB128(Value, OS); 69 uint32_t Offset = 0; 70 DWARFFormValue Result(DW_FORM_udata); 71 DataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void*)); 72 Result.extractValue(Data, &Offset, nullptr); 73 return Result; 74} 75 76DWARFFormValue createSLEBFormValue(int64_t Value) { 77 SmallString<10> RawData; 78 raw_svector_ostream OS(RawData); 79 encodeSLEB128(Value, OS); 80 uint32_t Offset = 0; 81 DWARFFormValue Result(DW_FORM_sdata); 82 DataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void*)); 83 Result.extractValue(Data, &Offset, nullptr); 84 return Result; 85} 86 87TEST(DWARFFormValue, SignedConstantForms) { 88 // Check that we correctly sign extend fixed size forms. 89 auto Sign1 = createDataXFormValue<uint8_t>(DW_FORM_data1, -123); 90 auto Sign2 = createDataXFormValue<uint16_t>(DW_FORM_data2, -12345); 91 auto Sign4 = createDataXFormValue<uint32_t>(DW_FORM_data4, -123456789); 92 auto Sign8 = createDataXFormValue<uint64_t>(DW_FORM_data8, -1); 93 EXPECT_EQ(Sign1.getAsSignedConstant().getValue(), -123); 94 EXPECT_EQ(Sign2.getAsSignedConstant().getValue(), -12345); 95 EXPECT_EQ(Sign4.getAsSignedConstant().getValue(), -123456789); 96 EXPECT_EQ(Sign8.getAsSignedConstant().getValue(), -1); 97 98 // Check that we can handle big positive values, but that we return 99 // an error just over the limit. 100 auto UMax = createULEBFormValue(LLONG_MAX); 101 auto TooBig = createULEBFormValue(uint64_t(LLONG_MAX) + 1); 102 EXPECT_EQ(UMax.getAsSignedConstant().getValue(), LLONG_MAX); 103 EXPECT_EQ(TooBig.getAsSignedConstant().hasValue(), false); 104 105 // Sanity check some other forms. 106 auto Data1 = createDataXFormValue<uint8_t>(DW_FORM_data1, 120); 107 auto Data2 = createDataXFormValue<uint16_t>(DW_FORM_data2, 32000); 108 auto Data4 = createDataXFormValue<uint32_t>(DW_FORM_data4, 2000000000); 109 auto Data8 = createDataXFormValue<uint64_t>(DW_FORM_data8, 0x1234567812345678LL); 110 auto LEBMin = createSLEBFormValue(LLONG_MIN); 111 auto LEBMax = createSLEBFormValue(LLONG_MAX); 112 auto LEB1 = createSLEBFormValue(-42); 113 auto LEB2 = createSLEBFormValue(42); 114 EXPECT_EQ(Data1.getAsSignedConstant().getValue(), 120); 115 EXPECT_EQ(Data2.getAsSignedConstant().getValue(), 32000); 116 EXPECT_EQ(Data4.getAsSignedConstant().getValue(), 2000000000); 117 EXPECT_EQ(Data8.getAsSignedConstant().getValue(), 0x1234567812345678LL); 118 EXPECT_EQ(LEBMin.getAsSignedConstant().getValue(), LLONG_MIN); 119 EXPECT_EQ(LEBMax.getAsSignedConstant().getValue(), LLONG_MAX); 120 EXPECT_EQ(LEB1.getAsSignedConstant().getValue(), -42); 121 EXPECT_EQ(LEB2.getAsSignedConstant().getValue(), 42); 122} 123 124} // end anonymous namespace 125