DWARFCFIProgram.h Source File (original) (raw)

9#ifndef LLVM_DEBUGINFO_DWARF_LOWLEVEL_DWARFCFIPROGRAM_H

10#define LLVM_DEBUGINFO_DWARF_LOWLEVEL_DWARFCFIPROGRAM_H

20#include

22namespace llvm {

33public:

55 using InstrList = std::vector;

64 unsigned size() const { return (unsigned)Instructions.size(); }

65 bool empty() const { return Instructions.empty(); }

67 int64_t dataAlign() const { return DataAlignmentFactor; }

72 : CodeAlignmentFactor(CodeAlignmentFactor),

73 DataAlignmentFactor(DataAlignmentFactor), Arch(Arch) {}

79 template

83 const uint8_t DWARF_CFI_PRIMARY_OPCODE_MASK = 0xc0;

84 const uint8_t DWARF_CFI_PRIMARY_OPERAND_MASK = 0x3f;

87 while (C && C.tell() < EndOffset) {

88 uint8_t Opcode = Data.getRelocatedValue(C, 1);

89 if ()

90 break;

93 if (uint8_t Primary = Opcode & DWARF_CFI_PRIMARY_OPCODE_MASK) {

96 uint64_t Op1 = Opcode & DWARF_CFI_PRIMARY_OPERAND_MASK;

97 switch (Primary) {

98 case DW_CFA_advance_loc:

99 case DW_CFA_restore:

101 break;

102 case DW_CFA_offset:

104 break;

105 default:

107 }

108 continue;

109 }

110

111

112 switch (Opcode) {

113 default:

115 "invalid extended CFI opcode 0x%" PRIx8,

116 Opcode);

117 case DW_CFA_nop:

118 case DW_CFA_remember_state:

119 case DW_CFA_restore_state:

120 case DW_CFA_GNU_window_save:

121 case DW_CFA_AARCH64_negate_ra_state_with_pc:

122

124 break;

125 case DW_CFA_set_loc:

126

128 break;

129 case DW_CFA_advance_loc1:

130

132 break;

133 case DW_CFA_advance_loc2:

134

136 break;

137 case DW_CFA_advance_loc4:

138

140 break;

141 case DW_CFA_restore_extended:

142 case DW_CFA_undefined:

143 case DW_CFA_same_value:

144 case DW_CFA_def_cfa_register:

145 case DW_CFA_def_cfa_offset:

146 case DW_CFA_GNU_args_size:

147

149 break;

150 case DW_CFA_def_cfa_offset_sf:

151

153 break;

154 case DW_CFA_LLVM_def_aspace_cfa:

155 case DW_CFA_LLVM_def_aspace_cfa_sf: {

156 auto RegNum = Data.getULEB128(C);

157 auto CfaOffset = Opcode == DW_CFA_LLVM_def_aspace_cfa

158 ? Data.getULEB128(C)

159 : Data.getSLEB128(C);

162 break;

163 }

164 case DW_CFA_offset_extended:

165 case DW_CFA_register:

166 case DW_CFA_def_cfa:

167 case DW_CFA_val_offset: {

168

169

170

171

175 break;

176 }

177 case DW_CFA_offset_extended_sf:

178 case DW_CFA_def_cfa_sf:

179 case DW_CFA_val_offset_sf: {

180

181

185 break;

186 }

187 case DW_CFA_def_cfa_expression: {

191

193 Data.getAddressSize());

194

195

196

197 Instructions.back().Expression =

199 break;

200 }

201 case DW_CFA_expression:

202 case DW_CFA_val_expression: {

205

209 Data.getAddressSize());

210

211

212

213 Instructions.back().Expression =

215 break;

216 }

217 }

218 }

219

221 return C.takeError();

222 }

223

225

226

228

229

230

231

232

233

234

247

248

250

251

252

254

255

259

260

262 Instructions.push_back(Instruction(Opcode));

263 Instructions.back().Ops.push_back(Operand1);

264 }

265

266

268 Instructions.push_back(Instruction(Opcode));

269 Instructions.back().Ops.push_back(Operand1);

270 Instructions.back().Ops.push_back(Operand2);

271 }

272

273

276 Instructions.push_back(Instruction(Opcode));

277 Instructions.back().Ops.push_back(Operand1);

278 Instructions.back().Ops.push_back(Operand2);

279 Instructions.back().Ops.push_back(Operand3);

280 }

281

282private:

283 std::vector Instructions;

284 const uint64_t CodeAlignmentFactor;

285 const int64_t DataAlignmentFactor;

287};

288

289}

290

291}

292

293#endif

This file defines the SmallString class.

ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...

Lightweight error class with error context and mandatory checking.

Tagged union holding either a T or a Error.

Class representing an expression and its matching format.

This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.

StringRef - Represent a constant reference to a string, i.e.

std::vector< Instruction > InstrList

Definition DWARFCFIProgram.h:55

const_iterator end() const

Definition DWARFCFIProgram.h:62

void addInstruction(uint8_t Opcode, uint64_t Operand1, uint64_t Operand2)

Add a new instruction that has two operands.

Definition DWARFCFIProgram.h:267

InstrList::const_iterator const_iterator

Definition DWARFCFIProgram.h:57

Triple::ArchType triple() const

Definition DWARFCFIProgram.h:68

InstrList::iterator iterator

Definition DWARFCFIProgram.h:56

OperandType

Types of operands to CFI instructions In DWARF, this type is implicitly tied to a CFI instruction opc...

Definition DWARFCFIProgram.h:235

@ OT_Expression

Definition DWARFCFIProgram.h:245

@ OT_FactoredCodeOffset

Definition DWARFCFIProgram.h:240

@ OT_AddressSpace

Definition DWARFCFIProgram.h:244

@ OT_None

Definition DWARFCFIProgram.h:237

@ OT_SignedFactDataOffset

Definition DWARFCFIProgram.h:241

@ OT_Unset

Definition DWARFCFIProgram.h:236

@ OT_Offset

Definition DWARFCFIProgram.h:239

@ OT_Register

Definition DWARFCFIProgram.h:243

@ OT_UnsignedFactDataOffset

Definition DWARFCFIProgram.h:242

@ OT_Address

Definition DWARFCFIProgram.h:238

void addInstruction(uint8_t Opcode, uint64_t Operand1, uint64_t Operand2, uint64_t Operand3)

Add a new instruction that has three operands.

Definition DWARFCFIProgram.h:274

uint64_t codeAlign() const

Definition DWARFCFIProgram.h:66

static constexpr size_t MaxOperands

Definition DWARFCFIProgram.h:34

Error parse(DWARFDataExtractorBase< T > &Data, uint64_t *Offset, uint64_t EndOffset)

Parse and store a sequence of CFI instructions from Data, starting at *Offset and ending at EndOffset...

Definition DWARFCFIProgram.h:80

static LLVM_ABI ArrayRef< OperandType[MaxOperands]> getOperandTypes()

Retrieve the array describing the types of operands according to the enum above.

SmallVector< uint64_t, MaxOperands > Operands

Definition DWARFCFIProgram.h:35

iterator end()

Definition DWARFCFIProgram.h:61

const_iterator begin() const

Definition DWARFCFIProgram.h:60

bool empty() const

Definition DWARFCFIProgram.h:65

iterator begin()

Definition DWARFCFIProgram.h:59

void addInstruction(const Instruction &I)

Definition DWARFCFIProgram.h:224

CFIProgram(uint64_t CodeAlignmentFactor, int64_t DataAlignmentFactor, Triple::ArchType Arch)

Definition DWARFCFIProgram.h:70

int64_t dataAlign() const

Definition DWARFCFIProgram.h:67

unsigned size() const

Definition DWARFCFIProgram.h:64

static LLVM_ABI const char * operandTypeString(OperandType OT)

Get the OperandType as a "const char *".

LLVM_ABI StringRef callFrameString(unsigned Opcode) const

Get a DWARF CFI call frame string for the given DW_CFA opcode.

void addInstruction(uint8_t Opcode, uint64_t Operand1)

Add a new single-operand instruction.

Definition DWARFCFIProgram.h:261

void addInstruction(uint8_t Opcode)

Convenience method to add a new instruction with the given opcode.

Definition DWARFCFIProgram.h:256

#define llvm_unreachable(msg)

Marks that the current location is not supposed to be reachable.

@ C

The default llvm calling convention, compatible with C.

Calculates the starting offsets for various sections within the .debug_names section.

This is an optimization pass for GlobalISel generic memory operations.

Error createStringError(std::error_code EC, char const *Fmt, const Ts &... Vals)

Create formatted StringError object.

FunctionAddr VTableAddr uintptr_t uintptr_t Data

An instruction consists of a DWARF CFI opcode and an optional sequence of operands.

Definition DWARFCFIProgram.h:40

std::optional< DWARFExpression > Expression

Definition DWARFCFIProgram.h:46

LLVM_ABI Expected< uint64_t > getOperandAsUnsigned(const CFIProgram &CFIP, uint32_t OperandIdx) const

uint8_t Opcode

Definition DWARFCFIProgram.h:43

Operands Ops

Definition DWARFCFIProgram.h:44

Instruction(uint8_t Opcode)

Definition DWARFCFIProgram.h:41

LLVM_ABI Expected< int64_t > getOperandAsSigned(const CFIProgram &CFIP, uint32_t OperandIdx) const