unittests/CodeGen/DIEHashTest.cpp

   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/CodeGen/DIE.h"
  11 #include "../lib/CodeGen/AsmPrinter/DIEHash.h"
  12 #include "llvm/ADT/STLExtras.h"
  13 #include "llvm/CodeGen/DwarfStringPoolEntry.h"
  14 #include "llvm/Support/Debug.h"
  15 #include "llvm/Support/Dwarf.h"
  16 #include "llvm/Support/Format.h"
  17 #include "gtest/gtest.h"
  18
  19 using namespace llvm;
  20
  21 namespace {
  22
  23 // Test fixture
  24 class DIEHashTest : public testing::Test {
  25 public:
  26   BumpPtrAllocator Alloc;
  27
  28 private:
  29   StringMap<DwarfStringPoolEntry> Pool;
  30
  31 public:
  32   DIEString getString(StringRef S) {
  33     DwarfStringPoolEntry Entry = {nullptr, 1, 1};
  34     return DIEString(
  35         DwarfStringPoolEntryRef(*Pool.insert(std::make_pair(S, Entry)).first));
  36   }
  37 };
  38
  39 TEST_F(DIEHashTest, Data1) {
  40   DIEHash Hash;
  41   DIE &Die = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
  42   DIEInteger Size(4);
  43   Die.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Size);
  44   uint64_t MD5Res = Hash.computeTypeSignature(Die);
  45   ASSERT_EQ(0x1AFE116E83701108ULL, MD5Res);
  46 }
  47
  48 // struct {};
  49 TEST_F(DIEHashTest, TrivialType) {
  50   DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
  51   DIEInteger One(1);
  52   Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
  53
  54   // Line and file number are ignored.
  55   Unnamed.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
  56   Unnamed.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
  57   uint64_t MD5Res = DIEHash().computeTypeSignature(Unnamed);
  58
  59   // The exact same hash GCC produces for this DIE.
  60   ASSERT_EQ(0x715305ce6cfd9ad1ULL, MD5Res);
  61 }
  62
  63 // struct foo { };
  64 TEST_F(DIEHashTest, NamedType) {
  65   DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
  66   DIEInteger One(1);
  67   DIEString FooStr = getString("foo");
  68   Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
  69   Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
  70
  71   uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
  72
  73   // The exact same hash GCC produces for this DIE.
  74   ASSERT_EQ(0xd566dbd2ca5265ffULL, MD5Res);
  75 }
  76
  77 // namespace space { struct foo { }; }
  78 TEST_F(DIEHashTest, NamespacedType) {
  79   DIE &CU = *DIE::get(Alloc, dwarf::DW_TAG_compile_unit);
  80
  81   auto Space = DIE::get(Alloc, dwarf::DW_TAG_namespace);
  82   DIEInteger One(1);
  83   DIEString SpaceStr = getString("space");
  84   Space->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, SpaceStr);
  85   // DW_AT_declaration is ignored.
  86   Space->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
  87                   One);
  88   // sibling?
  89
  90   auto Foo = DIE::get(Alloc, dwarf::DW_TAG_structure_type);
  91   DIEString FooStr = getString("foo");
  92   Foo->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
  93   Foo->addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
  94
  95   DIE &N = *Foo;
  96   Space->addChild(std::move(Foo));
  97   CU.addChild(std::move(Space));
  98
  99   uint64_t MD5Res = DIEHash().computeTypeSignature(N);
 100
 101   // The exact same hash GCC produces for this DIE.
 102   ASSERT_EQ(0x7b80381fd17f1e33ULL, MD5Res);
 103 }
 104
 105 // struct { int member; };
 106 TEST_F(DIEHashTest, TypeWithMember) {
 107   DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 108   DIEInteger Four(4);
 109   Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
 110
 111   DIE &Int = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
 112   DIEString IntStr = getString("int");
 113   Int.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, IntStr);
 114   Int.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
 115   DIEInteger Five(5);
 116   Int.addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, Five);
 117
 118   DIEEntry IntRef(Int);
 119
 120   auto Member = DIE::get(Alloc, dwarf::DW_TAG_member);
 121   DIEString MemberStr = getString("member");
 122   Member->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemberStr);
 123   DIEInteger Zero(0);
 124   Member->addValue(Alloc, dwarf::DW_AT_data_member_location,
 125                    dwarf::DW_FORM_data1, Zero);
 126   Member->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntRef);
 127
 128   Unnamed.addChild(std::move(Member));
 129
 130   uint64_t MD5Res = DIEHash().computeTypeSignature(Unnamed);
 131
 132   ASSERT_EQ(0x5646aa436b7e07c6ULL, MD5Res);
 133 }
 134
 135 // struct foo { int mem1, mem2; };
 136 TEST_F(DIEHashTest, ReusedType) {
 137   DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 138   DIEInteger Eight(8);
 139   Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 140
 141   DIEInteger Four(4);
 142   DIE &Int = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
 143   DIEString IntStr = getString("int");
 144   Int.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, IntStr);
 145   Int.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
 146   DIEInteger Five(5);
 147   Int.addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, Five);
 148
 149   DIEEntry IntRef(Int);
 150
 151   auto Mem1 = DIE::get(Alloc, dwarf::DW_TAG_member);
 152   DIEString Mem1Str = getString("mem1");
 153   Mem1->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, Mem1Str);
 154   DIEInteger Zero(0);
 155   Mem1->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
 156                  Zero);
 157   Mem1->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntRef);
 158
 159   Unnamed.addChild(std::move(Mem1));
 160
 161   auto Mem2 = DIE::get(Alloc, dwarf::DW_TAG_member);
 162   DIEString Mem2Str = getString("mem2");
 163   Mem2->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, Mem2Str);
 164   Mem2->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
 165                  Four);
 166   Mem2->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntRef);
 167
 168   Unnamed.addChild(std::move(Mem2));
 169
 170   uint64_t MD5Res = DIEHash().computeTypeSignature(Unnamed);
 171
 172   ASSERT_EQ(0x3a7dc3ed7b76b2f8ULL, MD5Res);
 173 }
 174
 175 // struct foo { static foo f; };
 176 TEST_F(DIEHashTest, RecursiveType) {
 177   DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 178   DIEInteger One(1);
 179   Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 180   DIEString FooStr = getString("foo");
 181   Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 182
 183   auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
 184   DIEString MemStr = getString("mem");
 185   Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
 186   DIEEntry FooRef(Foo);
 187   Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRef);
 188   // DW_AT_external and DW_AT_declaration are ignored anyway, so skip them.
 189
 190   Foo.addChild(std::move(Mem));
 191
 192   uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
 193
 194   ASSERT_EQ(0x73d8b25aef227b06ULL, MD5Res);
 195 }
 196
 197 // struct foo { foo *mem; };
 198 TEST_F(DIEHashTest, Pointer) {
 199   DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 200   DIEInteger Eight(8);
 201   Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 202   DIEString FooStr = getString("foo");
 203   Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 204
 205   auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
 206   DIEString MemStr = getString("mem");
 207   Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
 208   DIEInteger Zero(0);
 209   Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
 210                 Zero);
 211
 212   DIE &FooPtr = *DIE::get(Alloc, dwarf::DW_TAG_pointer_type);
 213   FooPtr.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 214   DIEEntry FooRef(Foo);
 215   FooPtr.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRef);
 216
 217   DIEEntry FooPtrRef(FooPtr);
 218   Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooPtrRef);
 219
 220   Foo.addChild(std::move(Mem));
 221
 222   uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
 223
 224   ASSERT_EQ(0x74ea73862e8708d2ULL, MD5Res);
 225 }
 226
 227 // struct foo { foo &mem; };
 228 TEST_F(DIEHashTest, Reference) {
 229   DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 230   DIEInteger Eight(8);
 231   Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 232   DIEString FooStr = getString("foo");
 233   Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 234
 235   auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
 236   DIEString MemStr = getString("mem");
 237   Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
 238   DIEInteger Zero(0);
 239   Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
 240                 Zero);
 241
 242   DIE &FooRef = *DIE::get(Alloc, dwarf::DW_TAG_reference_type);
 243   FooRef.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 244   DIEEntry FooEntry(Foo);
 245   FooRef.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooEntry);
 246
 247   DIE &FooRefConst = *DIE::get(Alloc, dwarf::DW_TAG_const_type);
 248   DIEEntry FooRefRef(FooRef);
 249   FooRefConst.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
 250                        FooRefRef);
 251
 252   DIEEntry FooRefConstRef(FooRefConst);
 253   Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRefConstRef);
 254
 255   Foo.addChild(std::move(Mem));
 256
 257   uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
 258
 259   ASSERT_EQ(0xa0b15f467ad4525bULL, MD5Res);
 260 }
 261
 262 // struct foo { foo &&mem; };
 263 TEST_F(DIEHashTest, RValueReference) {
 264   DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 265   DIEInteger Eight(8);
 266   Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 267   DIEString FooStr = getString("foo");
 268   Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 269
 270   auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
 271   DIEString MemStr = getString("mem");
 272   Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
 273   DIEInteger Zero(0);
 274   Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
 275                 Zero);
 276
 277   DIE &FooRef = *DIE::get(Alloc, dwarf::DW_TAG_rvalue_reference_type);
 278   FooRef.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 279   DIEEntry FooEntry(Foo);
 280   FooRef.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooEntry);
 281
 282   DIE &FooRefConst = *DIE::get(Alloc, dwarf::DW_TAG_const_type);
 283   DIEEntry FooRefRef(FooRef);
 284   FooRefConst.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
 285                        FooRefRef);
 286
 287   DIEEntry FooRefConstRef(FooRefConst);
 288   Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooRefConstRef);
 289
 290   Foo.addChild(std::move(Mem));
 291
 292   uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
 293
 294   ASSERT_EQ(0xad211c8c3b31e57ULL, MD5Res);
 295 }
 296
 297 // struct foo { foo foo::*mem; };
 298 TEST_F(DIEHashTest, PtrToMember) {
 299   DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 300   DIEInteger Eight(8);
 301   Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 302   DIEString FooStr = getString("foo");
 303   Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 304
 305   auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
 306   DIEString MemStr = getString("mem");
 307   Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
 308   DIEInteger Zero(0);
 309   Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
 310                 Zero);
 311
 312   DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
 313   DIEEntry FooEntry(Foo);
 314   PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FooEntry);
 315   PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
 316                        FooEntry);
 317
 318   DIEEntry PtrToFooMemRef(PtrToFooMem);
 319   Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, PtrToFooMemRef);
 320
 321   Foo.addChild(std::move(Mem));
 322
 323   uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
 324
 325   ASSERT_EQ(0x852e0c9ff7c04ebULL, MD5Res);
 326 }
 327
 328 // Check that the hash for a pointer-to-member matches regardless of whether the
 329 // pointed-to type is a declaration or a definition.
 330 //
 331 //   struct bar; // { };
 332 //   struct foo { bar foo::*mem; };
 333 TEST_F(DIEHashTest, PtrToMemberDeclDefMatch) {
 334   DIEInteger Zero(0);
 335   DIEInteger One(1);
 336   DIEInteger Eight(8);
 337   DIEString FooStr = getString("foo");
 338   DIEString BarStr = getString("bar");
 339   DIEString MemStr = getString("mem");
 340   uint64_t MD5ResDecl;
 341   {
 342     DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 343     Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
 344     Bar.addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
 345                  One);
 346
 347     DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 348     Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 349     Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 350
 351     auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
 352     Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
 353     Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
 354                   dwarf::DW_FORM_data1, Zero);
 355
 356     DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
 357     DIEEntry BarEntry(Bar);
 358     PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
 359                          BarEntry);
 360     DIEEntry FooEntry(Foo);
 361     PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
 362                          dwarf::DW_FORM_ref4, FooEntry);
 363
 364     DIEEntry PtrToFooMemRef(PtrToFooMem);
 365     Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
 366                   PtrToFooMemRef);
 367
 368     Foo.addChild(std::move(Mem));
 369
 370     MD5ResDecl = DIEHash().computeTypeSignature(Foo);
 371   }
 372   uint64_t MD5ResDef;
 373   {
 374     DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 375     Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
 376     Bar.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 377
 378     DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 379     Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 380     Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 381
 382     auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
 383     Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
 384     Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
 385                   dwarf::DW_FORM_data1, Zero);
 386
 387     DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
 388     DIEEntry BarEntry(Bar);
 389     PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
 390                          BarEntry);
 391     DIEEntry FooEntry(Foo);
 392     PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
 393                          dwarf::DW_FORM_ref4, FooEntry);
 394
 395     DIEEntry PtrToFooMemRef(PtrToFooMem);
 396     Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
 397                   PtrToFooMemRef);
 398
 399     Foo.addChild(std::move(Mem));
 400
 401     MD5ResDef = DIEHash().computeTypeSignature(Foo);
 402   }
 403   ASSERT_EQ(MD5ResDef, MD5ResDecl);
 404 }
 405
 406 // Check that the hash for a pointer-to-member matches regardless of whether the
 407 // pointed-to type is a declaration or a definition.
 408 //
 409 //   struct bar; // { };
 410 //   struct foo { bar bar::*mem; };
 411 TEST_F(DIEHashTest, PtrToMemberDeclDefMisMatch) {
 412   DIEInteger Zero(0);
 413   DIEInteger One(1);
 414   DIEInteger Eight(8);
 415   DIEString FooStr = getString("foo");
 416   DIEString BarStr = getString("bar");
 417   DIEString MemStr = getString("mem");
 418   uint64_t MD5ResDecl;
 419   {
 420     DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 421     Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
 422     Bar.addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
 423                  One);
 424
 425     DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 426     Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 427     Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 428
 429     auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
 430     Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
 431     Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
 432                   dwarf::DW_FORM_data1, Zero);
 433
 434     DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
 435     DIEEntry BarEntry(Bar);
 436     PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
 437                          BarEntry);
 438     PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
 439                          dwarf::DW_FORM_ref4, BarEntry);
 440
 441     DIEEntry PtrToFooMemRef(PtrToFooMem);
 442     Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
 443                   PtrToFooMemRef);
 444
 445     Foo.addChild(std::move(Mem));
 446
 447     MD5ResDecl = DIEHash().computeTypeSignature(Foo);
 448   }
 449   uint64_t MD5ResDef;
 450   {
 451     DIE &Bar = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 452     Bar.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, BarStr);
 453     Bar.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 454
 455     DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 456     Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 457     Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 458
 459     auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
 460     Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
 461     Mem->addValue(Alloc, dwarf::DW_AT_data_member_location,
 462                   dwarf::DW_FORM_data1, Zero);
 463
 464     DIE &PtrToFooMem = *DIE::get(Alloc, dwarf::DW_TAG_ptr_to_member_type);
 465     DIEEntry BarEntry(Bar);
 466     PtrToFooMem.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
 467                          BarEntry);
 468     PtrToFooMem.addValue(Alloc, dwarf::DW_AT_containing_type,
 469                          dwarf::DW_FORM_ref4, BarEntry);
 470
 471     DIEEntry PtrToFooMemRef(PtrToFooMem);
 472     Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
 473                   PtrToFooMemRef);
 474
 475     Foo.addChild(std::move(Mem));
 476
 477     MD5ResDef = DIEHash().computeTypeSignature(Foo);
 478   }
 479   // FIXME: This seems to be a bug in the DWARF type hashing specification that
 480   // only uses the brief name hashing for types referenced via DW_AT_type. In
 481   // this case the type is referenced via DW_AT_containing_type and full hashing
 482   // causes a hash to differ when the containing type is a declaration in one TU
 483   // and a definition in another.
 484   ASSERT_NE(MD5ResDef, MD5ResDecl);
 485 }
 486
 487 // struct { } a;
 488 // struct foo { decltype(a) mem; };
 489 TEST_F(DIEHashTest, RefUnnamedType) {
 490   DIEInteger Zero(0);
 491   DIEInteger One(1);
 492   DIEInteger Eight(8);
 493   DIEString FooStr = getString("foo");
 494   DIEString MemStr = getString("mem");
 495
 496   DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 497   Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 498
 499   DIE &Foo = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 500   Foo.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Eight);
 501   Foo.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 502
 503   auto Mem = DIE::get(Alloc, dwarf::DW_TAG_member);
 504   Mem->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, MemStr);
 505   Mem->addValue(Alloc, dwarf::DW_AT_data_member_location, dwarf::DW_FORM_data1,
 506                 Zero);
 507
 508   DIE &UnnamedPtr = *DIE::get(Alloc, dwarf::DW_TAG_pointer_type);
 509   UnnamedPtr.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1,
 510                       Eight);
 511   DIEEntry UnnamedRef(Unnamed);
 512   UnnamedPtr.addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4,
 513                       UnnamedRef);
 514
 515   DIEEntry UnnamedPtrRef(UnnamedPtr);
 516   Mem->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, UnnamedPtrRef);
 517
 518   Foo.addChild(std::move(Mem));
 519
 520   uint64_t MD5Res = DIEHash().computeTypeSignature(Foo);
 521
 522   ASSERT_EQ(0x954e026f01c02529ULL, MD5Res);
 523 }
 524
 525 // struct { struct foo { }; };
 526 TEST_F(DIEHashTest, NestedType) {
 527   DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 528   DIEInteger One(1);
 529   Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 530
 531   auto Foo = DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 532   DIEString FooStr = getString("foo");
 533   Foo->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FooStr);
 534   Foo->addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 535
 536   Unnamed.addChild(std::move(Foo));
 537
 538   uint64_t MD5Res = DIEHash().computeTypeSignature(Unnamed);
 539
 540   // The exact same hash GCC produces for this DIE.
 541   ASSERT_EQ(0xde8a3b7b43807f4aULL, MD5Res);
 542 }
 543
 544 // struct { static void func(); };
 545 TEST_F(DIEHashTest, MemberFunc) {
 546   DIE &Unnamed = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 547   DIEInteger One(1);
 548   Unnamed.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 549
 550   auto Func = DIE::get(Alloc, dwarf::DW_TAG_subprogram);
 551   DIEString FuncStr = getString("func");
 552   Func->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FuncStr);
 553
 554   Unnamed.addChild(std::move(Func));
 555
 556   uint64_t MD5Res = DIEHash().computeTypeSignature(Unnamed);
 557
 558   // The exact same hash GCC produces for this DIE.
 559   ASSERT_EQ(0xd36a1b6dfb604ba0ULL, MD5Res);
 560 }
 561
 562 // struct A {
 563 //   static void func();
 564 // };
 565 TEST_F(DIEHashTest, MemberFuncFlag) {
 566   DIE &A = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 567   DIEInteger One(1);
 568   DIEString AStr = getString("A");
 569   A.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, AStr);
 570   A.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 571   A.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
 572   A.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
 573
 574   auto Func = DIE::get(Alloc, dwarf::DW_TAG_subprogram);
 575   DIEString FuncStr = getString("func");
 576   DIEString FuncLinkage = getString("_ZN1A4funcEv");
 577   DIEInteger Two(2);
 578   Func->addValue(Alloc, dwarf::DW_AT_external, dwarf::DW_FORM_flag_present,
 579                  One);
 580   Func->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FuncStr);
 581   Func->addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
 582   Func->addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, Two);
 583   Func->addValue(Alloc, dwarf::DW_AT_linkage_name, dwarf::DW_FORM_strp,
 584                  FuncLinkage);
 585   Func->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
 586                  One);
 587
 588   A.addChild(std::move(Func));
 589
 590   uint64_t MD5Res = DIEHash().computeTypeSignature(A);
 591
 592   // The exact same hash GCC produces for this DIE.
 593   ASSERT_EQ(0x8f78211ddce3df10ULL, MD5Res);
 594 }
 595
 596 // Derived from:
 597 // struct A {
 598 //   const static int PI = -3;
 599 // };
 600 // A a;
 601 TEST_F(DIEHashTest, MemberSdata) {
 602   DIE &A = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 603   DIEInteger One(1);
 604   DIEString AStr = getString("A");
 605   A.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, AStr);
 606   A.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 607   A.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
 608   A.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
 609
 610   DIEInteger Four(4);
 611   DIEInteger Five(5);
 612   DIEString FStr = getString("int");
 613   DIE &IntTyDIE = *DIE::get(Alloc, dwarf::DW_TAG_base_type);
 614   IntTyDIE.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, Four);
 615   IntTyDIE.addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, Five);
 616   IntTyDIE.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FStr);
 617
 618   DIEEntry IntTy(IntTyDIE);
 619   auto PITyDIE = DIE::get(Alloc, dwarf::DW_TAG_const_type);
 620   PITyDIE->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IntTy);
 621
 622   DIEEntry PITy(*PITyDIE);
 623   auto PI = DIE::get(Alloc, dwarf::DW_TAG_member);
 624   DIEString PIStr = getString("PI");
 625   DIEInteger Two(2);
 626   DIEInteger NegThree(-3);
 627   PI->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, PIStr);
 628   PI->addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
 629   PI->addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, Two);
 630   PI->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, PITy);
 631   PI->addValue(Alloc, dwarf::DW_AT_external, dwarf::DW_FORM_flag_present, One);
 632   PI->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
 633                One);
 634   PI->addValue(Alloc, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, NegThree);
 635
 636   A.addChild(std::move(PI));
 637
 638   uint64_t MD5Res = DIEHash().computeTypeSignature(A);
 639   ASSERT_EQ(0x9a216000dd3788a7ULL, MD5Res);
 640 }
 641
 642 // Derived from:
 643 // struct A {
 644 //   const static float PI = 3.14;
 645 // };
 646 // A a;
 647 TEST_F(DIEHashTest, MemberBlock) {
 648   DIE &A = *DIE::get(Alloc, dwarf::DW_TAG_structure_type);
 649   DIEInteger One(1);
 650   DIEString AStr = getString("A");
 651   A.addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, AStr);
 652   A.addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1, One);
 653   A.addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
 654   A.addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, One);
 655
 656   DIEInteger Four(4);
 657   DIEString FStr = getString("float");
 658   auto FloatTyDIE = DIE::get(Alloc, dwarf::DW_TAG_base_type);
 659   FloatTyDIE->addValue(Alloc, dwarf::DW_AT_byte_size, dwarf::DW_FORM_data1,
 660                        Four);
 661   FloatTyDIE->addValue(Alloc, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
 662                        Four);
 663   FloatTyDIE->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, FStr);
 664   DIEEntry FloatTy(*FloatTyDIE);
 665   auto PITyDIE = DIE::get(Alloc, dwarf::DW_TAG_const_type);
 666   PITyDIE->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, FloatTy);
 667
 668   DIEEntry PITy(*PITyDIE);
 669   auto PI = DIE::get(Alloc, dwarf::DW_TAG_member);
 670   DIEString PIStr = getString("PI");
 671   DIEInteger Two(2);
 672   PI->addValue(Alloc, dwarf::DW_AT_name, dwarf::DW_FORM_strp, PIStr);
 673   PI->addValue(Alloc, dwarf::DW_AT_decl_file, dwarf::DW_FORM_data1, One);
 674   PI->addValue(Alloc, dwarf::DW_AT_decl_line, dwarf::DW_FORM_data1, Two);
 675   PI->addValue(Alloc, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, PITy);
 676   PI->addValue(Alloc, dwarf::DW_AT_external, dwarf::DW_FORM_flag_present, One);
 677   PI->addValue(Alloc, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag_present,
 678                One);
 679
 680   DIEBlock PIBlock;
 681   DIEInteger Blk1(0xc3);
 682   DIEInteger Blk2(0xf5);
 683   DIEInteger Blk3(0x48);
 684   DIEInteger Blk4(0x40);
 685
 686   PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk1);
 687   PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk2);
 688   PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk3);
 689   PIBlock.addValue(Alloc, (dwarf::Attribute)0, dwarf::DW_FORM_data1, Blk4);
 690
 691   PI->addValue(Alloc, dwarf::DW_AT_const_value, dwarf::DW_FORM_block1,
 692                &PIBlock);
 693
 694   A.addChild(std::move(PI));
 695
 696   uint64_t MD5Res = DIEHash().computeTypeSignature(A);
 697   ASSERT_EQ(0x493af53ad3d3f651ULL, MD5Res);
 698 }
 699 }