1 //===- llvm/unittest/DebugInfo/DWARFFormValueTest.cpp ---------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
10 #include "llvm/ADT/ArrayRef.h"
11 #include "llvm/ADT/SmallString.h"
12 #include "llvm/BinaryFormat/Dwarf.h"
13 #include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
14 #include "llvm/Support/FormatVariadic.h"
15 #include "llvm/Support/Host.h"
16 #include "llvm/Support/LEB128.h"
17 #include "gtest/gtest.h"
18 #include <climits>
19 using namespace llvm;
20 using namespace dwarf;
21 
22 namespace {
23 
24 bool isFormClass(dwarf::Form Form, DWARFFormValue::FormClass FC) {
25   return DWARFFormValue(Form).isFormClass(FC);
26 }
27 
28 TEST(DWARFFormValue, FormClass) {
29   EXPECT_TRUE(isFormClass(DW_FORM_addr, DWARFFormValue::FC_Address));
30   EXPECT_FALSE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_Address));
31   EXPECT_TRUE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_Constant));
32   EXPECT_TRUE(isFormClass(DW_FORM_data8, DWARFFormValue::FC_SectionOffset));
33   EXPECT_TRUE(
34       isFormClass(DW_FORM_sec_offset, DWARFFormValue::FC_SectionOffset));
35   EXPECT_TRUE(isFormClass(DW_FORM_GNU_str_index, DWARFFormValue::FC_String));
36   EXPECT_TRUE(isFormClass(DW_FORM_GNU_addr_index, DWARFFormValue::FC_Address));
37   EXPECT_FALSE(isFormClass(DW_FORM_ref_addr, DWARFFormValue::FC_Address));
38   EXPECT_TRUE(isFormClass(DW_FORM_ref_addr, DWARFFormValue::FC_Reference));
39   EXPECT_TRUE(isFormClass(DW_FORM_ref_sig8, DWARFFormValue::FC_Reference));
40 }
41 
42 template<typename RawTypeT>
43 DWARFFormValue createDataXFormValue(dwarf::Form Form, RawTypeT Value) {
44   char Raw[sizeof(RawTypeT)];
45   memcpy(Raw, &Value, sizeof(RawTypeT));
46   uint64_t Offset = 0;
47   DWARFFormValue Result(Form);
48   DWARFDataExtractor Data(StringRef(Raw, sizeof(RawTypeT)),
49                           sys::IsLittleEndianHost, sizeof(void *));
50   Result.extractValue(Data, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
51   return Result;
52 }
53 
54 DWARFFormValue createULEBFormValue(uint64_t Value) {
55   SmallString<10> RawData;
56   raw_svector_ostream OS(RawData);
57   encodeULEB128(Value, OS);
58   uint64_t Offset = 0;
59   DWARFFormValue Result(DW_FORM_udata);
60   DWARFDataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void *));
61   Result.extractValue(Data, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
62   return Result;
63 }
64 
65 DWARFFormValue createSLEBFormValue(int64_t Value) {
66   SmallString<10> RawData;
67   raw_svector_ostream OS(RawData);
68   encodeSLEB128(Value, OS);
69   uint64_t Offset = 0;
70   DWARFFormValue Result(DW_FORM_sdata);
71   DWARFDataExtractor Data(OS.str(), sys::IsLittleEndianHost, sizeof(void *));
72   Result.extractValue(Data, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
73   return Result;
74 }
75 
76 TEST(DWARFFormValue, SignedConstantForms) {
77   // Check that we correctly sign extend fixed size forms.
78   auto Sign1 = createDataXFormValue<uint8_t>(DW_FORM_data1, -123);
79   auto Sign2 = createDataXFormValue<uint16_t>(DW_FORM_data2, -12345);
80   auto Sign4 = createDataXFormValue<uint32_t>(DW_FORM_data4, -123456789);
81   auto Sign8 = createDataXFormValue<uint64_t>(DW_FORM_data8, -1);
82   EXPECT_EQ(Sign1.getAsSignedConstant().getValue(), -123);
83   EXPECT_EQ(Sign2.getAsSignedConstant().getValue(), -12345);
84   EXPECT_EQ(Sign4.getAsSignedConstant().getValue(), -123456789);
85   EXPECT_EQ(Sign8.getAsSignedConstant().getValue(), -1);
86 
87   // Check that we can handle big positive values, but that we return
88   // an error just over the limit.
89   auto UMax = createULEBFormValue(LLONG_MAX);
90   auto TooBig = createULEBFormValue(uint64_t(LLONG_MAX) + 1);
91   EXPECT_EQ(UMax.getAsSignedConstant().getValue(), LLONG_MAX);
92   EXPECT_EQ(TooBig.getAsSignedConstant().has_value(), false);
93 
94   // Sanity check some other forms.
95   auto Data1 = createDataXFormValue<uint8_t>(DW_FORM_data1, 120);
96   auto Data2 = createDataXFormValue<uint16_t>(DW_FORM_data2, 32000);
97   auto Data4 = createDataXFormValue<uint32_t>(DW_FORM_data4, 2000000000);
98   auto Data8 = createDataXFormValue<uint64_t>(DW_FORM_data8, 0x1234567812345678LL);
99   auto LEBMin = createSLEBFormValue(LLONG_MIN);
100   auto LEBMax = createSLEBFormValue(LLONG_MAX);
101   auto LEB1 = createSLEBFormValue(-42);
102   auto LEB2 = createSLEBFormValue(42);
103   EXPECT_EQ(Data1.getAsSignedConstant().getValue(), 120);
104   EXPECT_EQ(Data2.getAsSignedConstant().getValue(), 32000);
105   EXPECT_EQ(Data4.getAsSignedConstant().getValue(), 2000000000);
106   EXPECT_EQ(Data8.getAsSignedConstant().getValue(), 0x1234567812345678LL);
107   EXPECT_EQ(LEBMin.getAsSignedConstant().getValue(), LLONG_MIN);
108   EXPECT_EQ(LEBMax.getAsSignedConstant().getValue(), LLONG_MAX);
109   EXPECT_EQ(LEB1.getAsSignedConstant().getValue(), -42);
110   EXPECT_EQ(LEB2.getAsSignedConstant().getValue(), 42);
111 
112   // Data16 is a little tricky.
113   char Cksum[16] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
114   DWARFFormValue Data16(DW_FORM_data16);
115   DWARFDataExtractor DE16(StringRef(Cksum, 16), sys::IsLittleEndianHost,
116                           sizeof(void *));
117   uint64_t Offset = 0;
118   Data16.extractValue(DE16, &Offset, {0, 0, dwarf::DwarfFormat::DWARF32});
119   SmallString<32> Str;
120   raw_svector_ostream Res(Str);
121   Data16.dump(Res, DIDumpOptions());
122   EXPECT_EQ(memcmp(Str.data(), "000102030405060708090a0b0c0d0e0f", 32), 0);
123 }
124 
125 using ParamType = std::tuple<Form, uint16_t, uint8_t, DwarfFormat,
126                              ArrayRef<uint8_t>, uint64_t, bool>;
127 
128 struct FormSkipValueFixtureBase : public testing::TestWithParam<ParamType> {
129   void SetUp() override {
130     std::tie(Fm, Version, AddrSize, Dwarf, InitialData, ExpectedSkipped,
131              ExpectedResult) = GetParam();
132   }
133 
134   void doSkipValueTest() {
135     SCOPED_TRACE("Inputs: Form = " + std::to_string(Fm) +
136                  ", Version = " + std::to_string(Version) +
137                  ", AddrSize = " + std::to_string(uint32_t(AddrSize)) +
138                  ", DwarfFormat = " + std::to_string(Dwarf));
139     std::vector<uint8_t> Buf(InitialData.data(),
140                              InitialData.data() + InitialData.size());
141     // The data extractor only adjusts the offset to the end of the buffer when
142     // attempting to read past the end, so the buffer must be bigger than the
143     // expected amount to be skipped to identify cases where more data than
144     // expected is skipped.
145     Buf.resize(ExpectedSkipped + 1);
146     DWARFDataExtractor Data(Buf, sys::IsLittleEndianHost, AddrSize);
147     uint64_t Offset = 0;
148     EXPECT_EQ(DWARFFormValue::skipValue(Fm, Data, &Offset,
149                                         {Version, AddrSize, Dwarf}),
150               ExpectedResult);
151     EXPECT_EQ(Offset, ExpectedSkipped);
152   }
153 
154   Form Fm;
155   uint16_t Version;
156   uint8_t AddrSize;
157   DwarfFormat Dwarf;
158   ArrayRef<uint8_t> InitialData;
159   uint64_t ExpectedSkipped;
160   bool ExpectedResult;
161 };
162 
163 template <typename T> static ArrayRef<uint8_t> toBytes(const T &Input) {
164   return ArrayRef<uint8_t>(reinterpret_cast<const uint8_t *>(&Input),
165                            sizeof(Input));
166 }
167 
168 const uint8_t LEBData[] = {0x80, 0x1};
169 ArrayRef<uint8_t> SampleLEB(LEBData, sizeof(LEBData));
170 const uint8_t SampleLength8 = 0x80;
171 const uint16_t SampleLength16 = 0x80;
172 const uint32_t SampleLength = 0x80;
173 ArrayRef<uint8_t> SampleU8 = toBytes(SampleLength8);
174 ArrayRef<uint8_t> SampleU16 = toBytes(SampleLength16);
175 ArrayRef<uint8_t> SampleU32 = toBytes(SampleLength);
176 const uint8_t StringData[] = "abcdef";
177 ArrayRef<uint8_t> SampleString(StringData, sizeof(StringData));
178 const uint8_t IndirectData8[] = {DW_FORM_data8};
179 const uint8_t IndirectData16[] = {DW_FORM_data16};
180 const uint8_t IndirectAddr[] = {DW_FORM_addr};
181 const uint8_t IndirectIndirectData1[] = {DW_FORM_indirect, DW_FORM_data1};
182 const uint8_t IndirectIndirectEnd[] = {DW_FORM_indirect};
183 
184 // Gtest's paramterised tests only allow a maximum of 50 cases, so split the
185 // test into multiple identical parts to share the cases.
186 struct FormSkipValueFixture1 : FormSkipValueFixtureBase {};
187 struct FormSkipValueFixture2 : FormSkipValueFixtureBase {};
188 TEST_P(FormSkipValueFixture1, skipValuePart1) { doSkipValueTest(); }
189 TEST_P(FormSkipValueFixture2, skipValuePart2) { doSkipValueTest(); }
190 
191 INSTANTIATE_TEST_SUITE_P(
192     SkipValueTestParams1, FormSkipValueFixture1,
193     testing::Values(
194         // Form, Version, AddrSize, DwarfFormat, InitialData, ExpectedSize,
195         // ExpectedResult.
196         ParamType(DW_FORM_exprloc, 0, 0, DWARF32, SampleLEB,
197                   SampleLength + SampleLEB.size(), true),
198         ParamType(DW_FORM_block, 0, 0, DWARF32, SampleLEB,
199                   SampleLength + SampleLEB.size(), true),
200         ParamType(DW_FORM_block1, 0, 0, DWARF32, SampleU8, SampleLength8 + 1,
201                   true),
202         ParamType(DW_FORM_block2, 0, 0, DWARF32, SampleU16, SampleLength16 + 2,
203                   true),
204         ParamType(DW_FORM_block4, 0, 0, DWARF32, SampleU32, SampleLength + 4,
205                   true),
206         ParamType(DW_FORM_string, 0, 0, DWARF32, SampleString,
207                   SampleString.size(), true),
208         ParamType(DW_FORM_addr, 0, 42, DWARF32, SampleU32, 0, false),
209         ParamType(DW_FORM_addr, 4, 0, DWARF32, SampleU32, 0, false),
210         ParamType(DW_FORM_addr, 4, 42, DWARF32, SampleU32, 42, true),
211         ParamType(DW_FORM_ref_addr, 0, 1, DWARF32, SampleU32, 0, false),
212         ParamType(DW_FORM_ref_addr, 1, 0, DWARF32, SampleU32, 0, false),
213         ParamType(DW_FORM_ref_addr, 1, 1, DWARF32, SampleU32, 4, true),
214         ParamType(DW_FORM_ref_addr, 1, 1, DWARF64, SampleU32, 8, true),
215         ParamType(DW_FORM_ref_addr, 2, 42, DWARF32, SampleU32, 42, true),
216         ParamType(DW_FORM_ref_addr, 2, 42, DWARF64, SampleU32, 42, true),
217         ParamType(DW_FORM_ref_addr, 3, 3, DWARF32, SampleU32, 4, true),
218         ParamType(DW_FORM_ref_addr, 3, 3, DWARF64, SampleU32, 8, true),
219         ParamType(DW_FORM_flag_present, 4, 4, DWARF32, SampleU32, 0, true),
220         ParamType(DW_FORM_data1, 0, 0, DWARF32, SampleU32, 1, true),
221         ParamType(DW_FORM_data2, 0, 0, DWARF32, SampleU32, 2, true),
222         ParamType(DW_FORM_data4, 0, 0, DWARF32, SampleU32, 4, true),
223         ParamType(DW_FORM_data8, 0, 0, DWARF32, SampleU32, 8, true),
224         ParamType(DW_FORM_data16, 0, 0, DWARF32, SampleU32, 16, true),
225         ParamType(DW_FORM_flag, 0, 0, DWARF32, SampleU32, 1, true),
226         ParamType(DW_FORM_ref1, 0, 0, DWARF32, SampleU32, 1, true),
227         ParamType(DW_FORM_ref2, 0, 0, DWARF32, SampleU32, 2, true),
228         ParamType(DW_FORM_ref4, 0, 0, DWARF32, SampleU32, 4, true),
229         ParamType(DW_FORM_ref8, 0, 0, DWARF32, SampleU32, 8, true),
230         ParamType(DW_FORM_ref_sig8, 0, 0, DWARF32, SampleU32, 8, true),
231         ParamType(DW_FORM_ref_sup4, 0, 0, DWARF32, SampleU32, 4, true),
232         ParamType(DW_FORM_ref_sup8, 0, 0, DWARF32, SampleU32, 8, true),
233         ParamType(DW_FORM_strx1, 0, 0, DWARF32, SampleU32, 1, true),
234         ParamType(DW_FORM_strx2, 0, 0, DWARF32, SampleU32, 2, true),
235         ParamType(DW_FORM_strx4, 0, 0, DWARF32, SampleU32, 4, true),
236         ParamType(DW_FORM_addrx1, 0, 0, DWARF32, SampleU32, 1, true),
237         ParamType(DW_FORM_addrx2, 0, 0, DWARF32, SampleU32, 2, true),
238         ParamType(DW_FORM_addrx4, 0, 0, DWARF32, SampleU32, 4, true),
239         ParamType(DW_FORM_sec_offset, 0, 1, DWARF32, SampleU32, 0, false),
240         ParamType(DW_FORM_sec_offset, 1, 0, DWARF32, SampleU32, 0, false),
241         ParamType(DW_FORM_sec_offset, 1, 1, DWARF32, SampleU32, 4, true),
242         ParamType(DW_FORM_sec_offset, 1, 1, DWARF64, SampleU32, 8, true),
243         ParamType(DW_FORM_strp, 0, 1, DWARF32, SampleU32, 0, false),
244         ParamType(DW_FORM_strp, 1, 0, DWARF32, SampleU32, 0, false),
245         ParamType(DW_FORM_strp, 1, 1, DWARF32, SampleU32, 4, true),
246         ParamType(DW_FORM_strp, 1, 1, DWARF64, SampleU32, 8, true),
247         ParamType(DW_FORM_strp_sup, 0, 1, DWARF32, SampleU32, 0, false),
248         ParamType(DW_FORM_strp_sup, 1, 0, DWARF32, SampleU32, 0, false),
249         ParamType(DW_FORM_strp_sup, 1, 1, DWARF32, SampleU32, 4, true),
250         ParamType(DW_FORM_strp_sup, 1, 1, DWARF64, SampleU32, 8, true)));
251 
252 INSTANTIATE_TEST_SUITE_P(
253     SkipValueTestParams2, FormSkipValueFixture2,
254     testing::Values(
255         ParamType(DW_FORM_line_strp, 0, 1, DWARF32, SampleU32, 0, false),
256         ParamType(DW_FORM_line_strp, 1, 0, DWARF32, SampleU32, 0, false),
257         ParamType(DW_FORM_line_strp, 1, 1, DWARF32, SampleU32, 4, true),
258         ParamType(DW_FORM_line_strp, 1, 1, DWARF64, SampleU32, 8, true),
259         ParamType(DW_FORM_GNU_ref_alt, 0, 1, DWARF32, SampleU32, 0, false),
260         ParamType(DW_FORM_GNU_ref_alt, 1, 0, DWARF32, SampleU32, 0, false),
261         ParamType(DW_FORM_GNU_ref_alt, 1, 1, DWARF32, SampleU32, 4, true),
262         ParamType(DW_FORM_GNU_ref_alt, 1, 1, DWARF64, SampleU32, 8, true),
263         ParamType(DW_FORM_GNU_strp_alt, 0, 1, DWARF32, SampleU32, 0, false),
264         ParamType(DW_FORM_GNU_strp_alt, 1, 0, DWARF32, SampleU32, 0, false),
265         ParamType(DW_FORM_GNU_strp_alt, 1, 1, DWARF32, SampleU32, 4, true),
266         ParamType(DW_FORM_GNU_strp_alt, 1, 1, DWARF64, SampleU32, 8, true),
267         ParamType(DW_FORM_sdata, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
268                   true),
269         ParamType(DW_FORM_udata, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
270                   true),
271         ParamType(DW_FORM_ref_udata, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
272                   true),
273         ParamType(DW_FORM_strx, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
274                   true),
275         ParamType(DW_FORM_addrx, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
276                   true),
277         ParamType(DW_FORM_loclistx, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
278                   true),
279         ParamType(DW_FORM_rnglistx, 0, 0, DWARF32, SampleLEB, SampleLEB.size(),
280                   true),
281         ParamType(DW_FORM_GNU_addr_index, 0, 0, DWARF32, SampleLEB,
282                   SampleLEB.size(), true),
283         ParamType(DW_FORM_GNU_str_index, 0, 0, DWARF32, SampleLEB,
284                   SampleLEB.size(), true),
285         ParamType(DW_FORM_indirect, 0, 0, DWARF32,
286                   ArrayRef<uint8_t>(IndirectData8, sizeof(IndirectData8)), 9,
287                   true),
288         ParamType(DW_FORM_indirect, 0, 0, DWARF32,
289                   ArrayRef<uint8_t>(IndirectData16, sizeof(IndirectData16)), 17,
290                   true),
291         ParamType(DW_FORM_indirect, 4, 0, DWARF32,
292                   ArrayRef<uint8_t>(IndirectAddr, sizeof(IndirectAddr)), 1,
293                   false),
294         ParamType(DW_FORM_indirect, 4, 4, DWARF32,
295                   ArrayRef<uint8_t>(IndirectAddr, sizeof(IndirectAddr)), 5,
296                   true),
297         ParamType(DW_FORM_indirect, 4, 4, DWARF32,
298                   ArrayRef<uint8_t>(IndirectIndirectData1,
299                                     sizeof(IndirectIndirectData1)),
300                   3, true),
301         ParamType(DW_FORM_indirect, 4, 4, DWARF32,
302                   ArrayRef<uint8_t>(IndirectIndirectEnd,
303                                     sizeof(IndirectIndirectEnd)),
304                   2, false),
305         ParamType(/*Unknown=*/Form(0xff), 4, 4, DWARF32, SampleU32, 0, false)));
306 
307 using ErrorParams = std::tuple<Form, std::vector<uint8_t>>;
308 struct ExtractValueErrorFixture : public testing::TestWithParam<ErrorParams> {
309   void SetUp() override { std::tie(Fm, InitialData) = GetParam(); }
310 
311   Form Fm;
312   ArrayRef<uint8_t> InitialData;
313 };
314 
315 TEST_P(ExtractValueErrorFixture, Test) {
316   SCOPED_TRACE(formatv("Fm = {0}, InitialData = {1}", Fm,
317                        make_range(InitialData.begin(), InitialData.end()))
318                    .str());
319 
320   DWARFDataExtractor Data(InitialData, sys::IsLittleEndianHost, 4);
321   DWARFFormValue Form(Fm);
322   uint64_t Offset = 0;
323   EXPECT_FALSE(Form.extractValue(Data, &Offset, {0, 0, DWARF32}));
324 }
325 
326 INSTANTIATE_TEST_SUITE_P(
327     ExtractValueErrorParams, ExtractValueErrorFixture,
328     testing::Values(
329         ErrorParams{DW_FORM_ref_addr, {}}, ErrorParams{DW_FORM_block, {}},
330         ErrorParams{DW_FORM_block, {1}}, ErrorParams{DW_FORM_block, {2, 0}},
331         ErrorParams{DW_FORM_block1, {}}, ErrorParams{DW_FORM_block2, {}},
332         ErrorParams{DW_FORM_block4, {}}, ErrorParams{DW_FORM_data1, {}},
333         ErrorParams{DW_FORM_data2, {}}, ErrorParams{DW_FORM_strx3, {}},
334         ErrorParams{DW_FORM_data4, {}}, ErrorParams{DW_FORM_data8, {}},
335         ErrorParams{DW_FORM_data16, {}}, ErrorParams{DW_FORM_sdata, {}},
336         ErrorParams{DW_FORM_udata, {}}, ErrorParams{DW_FORM_string, {}},
337         ErrorParams{DW_FORM_indirect, {}},
338         ErrorParams{DW_FORM_indirect, {DW_FORM_data1}},
339         ErrorParams{DW_FORM_strp_sup, {}}, ErrorParams{DW_FORM_ref_sig8, {}}));
340 
341 using DumpValueParams =
342     std::tuple<Form, ArrayRef<uint8_t>, DwarfFormat, StringRef>;
343 struct DumpValueFixture : public testing::TestWithParam<DumpValueParams> {
344   void SetUp() override {
345     std::tie(Fm, InitialData, Format, ExpectedResult) = GetParam();
346   }
347 
348   Form Fm;
349   ArrayRef<uint8_t> InitialData;
350   DwarfFormat Format;
351   StringRef ExpectedResult;
352 };
353 
354 TEST_P(DumpValueFixture, Test) {
355   SCOPED_TRACE(formatv("Fm = {0}, InitialData = [{1}], Format = {2}", Fm,
356                        toHex(InitialData),
357                        Format == DWARF64 ? "DWARF64" : "DWARF32"));
358   DWARFDataExtractor Data(InitialData, sys::IsLittleEndianHost, 8);
359   DWARFFormValue Form(Fm);
360   uint64_t Offset = 0;
361   Form.extractValue(Data, &Offset, {0, 0, Format});
362 
363   std::string Output;
364   raw_string_ostream OS(Output);
365 
366   DIDumpOptions Opts;
367   Opts.Verbose = true;
368   Opts.ShowAddresses = true;
369 
370   Form.dump(OS, Opts);
371   OS.flush();
372 
373   EXPECT_EQ(Output, ExpectedResult);
374 }
375 
376 const uint32_t DumpTestSample32Val = 0x112233;
377 ArrayRef<uint8_t> DumpTestSample32 = toBytes(DumpTestSample32Val);
378 const uint64_t DumpTestSample64Val = 0x11223344556677;
379 ArrayRef<uint8_t> DumpTestSample64 = toBytes(DumpTestSample64Val);
380 
381 INSTANTIATE_TEST_SUITE_P(
382     DumpValueParams, DumpValueFixture,
383     testing::Values(DumpValueParams{DW_FORM_strp, DumpTestSample32, DWARF32,
384                                     " .debug_str[0x00112233] = "},
385                     DumpValueParams{DW_FORM_strp, DumpTestSample64, DWARF64,
386                                     " .debug_str[0x0011223344556677] = "},
387                     DumpValueParams{DW_FORM_line_strp, DumpTestSample32,
388                                     DWARF32, " .debug_line_str[0x00112233] = "},
389                     DumpValueParams{DW_FORM_line_strp, DumpTestSample64,
390                                     DWARF64,
391                                     " .debug_line_str[0x0011223344556677] = "},
392                     DumpValueParams{DW_FORM_sec_offset, DumpTestSample32,
393                                     DWARF32, "0x00112233"},
394                     DumpValueParams{DW_FORM_sec_offset, DumpTestSample64,
395                                     DWARF64, "0x0011223344556677"}));
396 
397 } // end anonymous namespace
398