Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1 | // Copyright 2010 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifdef ENABLE_GDB_JIT_INTERFACE |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 29 | #include "v8.h" |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 30 | #include "gdb-jit.h" |
| 31 | |
| 32 | #include "bootstrapper.h" |
| 33 | #include "compiler.h" |
| 34 | #include "global-handles.h" |
| 35 | #include "messages.h" |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 36 | #include "platform.h" |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 37 | #include "natives.h" |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 38 | #include "scopeinfo.h" |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 39 | |
| 40 | namespace v8 { |
| 41 | namespace internal { |
| 42 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 43 | #ifdef __APPLE__ |
| 44 | #define __MACH_O |
| 45 | class MachO; |
| 46 | class MachOSection; |
| 47 | typedef MachO DebugObject; |
| 48 | typedef MachOSection DebugSection; |
| 49 | #else |
| 50 | #define __ELF |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 51 | class ELF; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 52 | class ELFSection; |
| 53 | typedef ELF DebugObject; |
| 54 | typedef ELFSection DebugSection; |
| 55 | #endif |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 56 | |
| 57 | class Writer BASE_EMBEDDED { |
| 58 | public: |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 59 | explicit Writer(DebugObject* debug_object) |
| 60 | : debug_object_(debug_object), |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 61 | position_(0), |
| 62 | capacity_(1024), |
| 63 | buffer_(reinterpret_cast<byte*>(malloc(capacity_))) { |
| 64 | } |
| 65 | |
| 66 | ~Writer() { |
| 67 | free(buffer_); |
| 68 | } |
| 69 | |
| 70 | uintptr_t position() const { |
| 71 | return position_; |
| 72 | } |
| 73 | |
| 74 | template<typename T> |
| 75 | class Slot { |
| 76 | public: |
| 77 | Slot(Writer* w, uintptr_t offset) : w_(w), offset_(offset) { } |
| 78 | |
| 79 | T* operator-> () { |
| 80 | return w_->RawSlotAt<T>(offset_); |
| 81 | } |
| 82 | |
| 83 | void set(const T& value) { |
| 84 | *w_->RawSlotAt<T>(offset_) = value; |
| 85 | } |
| 86 | |
| 87 | Slot<T> at(int i) { |
| 88 | return Slot<T>(w_, offset_ + sizeof(T) * i); |
| 89 | } |
| 90 | |
| 91 | private: |
| 92 | Writer* w_; |
| 93 | uintptr_t offset_; |
| 94 | }; |
| 95 | |
| 96 | template<typename T> |
| 97 | void Write(const T& val) { |
| 98 | Ensure(position_ + sizeof(T)); |
| 99 | *RawSlotAt<T>(position_) = val; |
| 100 | position_ += sizeof(T); |
| 101 | } |
| 102 | |
| 103 | template<typename T> |
| 104 | Slot<T> SlotAt(uintptr_t offset) { |
| 105 | Ensure(offset + sizeof(T)); |
| 106 | return Slot<T>(this, offset); |
| 107 | } |
| 108 | |
| 109 | template<typename T> |
| 110 | Slot<T> CreateSlotHere() { |
| 111 | return CreateSlotsHere<T>(1); |
| 112 | } |
| 113 | |
| 114 | template<typename T> |
| 115 | Slot<T> CreateSlotsHere(uint32_t count) { |
| 116 | uintptr_t slot_position = position_; |
| 117 | position_ += sizeof(T) * count; |
| 118 | Ensure(position_); |
| 119 | return SlotAt<T>(slot_position); |
| 120 | } |
| 121 | |
| 122 | void Ensure(uintptr_t pos) { |
| 123 | if (capacity_ < pos) { |
| 124 | while (capacity_ < pos) capacity_ *= 2; |
| 125 | buffer_ = reinterpret_cast<byte*>(realloc(buffer_, capacity_)); |
| 126 | } |
| 127 | } |
| 128 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 129 | DebugObject* debug_object() { return debug_object_; } |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 130 | |
| 131 | byte* buffer() { return buffer_; } |
| 132 | |
| 133 | void Align(uintptr_t align) { |
| 134 | uintptr_t delta = position_ % align; |
| 135 | if (delta == 0) return; |
| 136 | uintptr_t padding = align - delta; |
| 137 | Ensure(position_ += padding); |
| 138 | ASSERT((position_ % align) == 0); |
| 139 | } |
| 140 | |
| 141 | void WriteULEB128(uintptr_t value) { |
| 142 | do { |
| 143 | uint8_t byte = value & 0x7F; |
| 144 | value >>= 7; |
| 145 | if (value != 0) byte |= 0x80; |
| 146 | Write<uint8_t>(byte); |
| 147 | } while (value != 0); |
| 148 | } |
| 149 | |
| 150 | void WriteSLEB128(intptr_t value) { |
| 151 | bool more = true; |
| 152 | while (more) { |
| 153 | int8_t byte = value & 0x7F; |
| 154 | bool byte_sign = byte & 0x40; |
| 155 | value >>= 7; |
| 156 | |
| 157 | if ((value == 0 && !byte_sign) || (value == -1 && byte_sign)) { |
| 158 | more = false; |
| 159 | } else { |
| 160 | byte |= 0x80; |
| 161 | } |
| 162 | |
| 163 | Write<int8_t>(byte); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | void WriteString(const char* str) { |
| 168 | do { |
| 169 | Write<char>(*str); |
| 170 | } while (*str++); |
| 171 | } |
| 172 | |
| 173 | private: |
| 174 | template<typename T> friend class Slot; |
| 175 | |
| 176 | template<typename T> |
| 177 | T* RawSlotAt(uintptr_t offset) { |
| 178 | ASSERT(offset < capacity_ && offset + sizeof(T) <= capacity_); |
| 179 | return reinterpret_cast<T*>(&buffer_[offset]); |
| 180 | } |
| 181 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 182 | DebugObject* debug_object_; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 183 | uintptr_t position_; |
| 184 | uintptr_t capacity_; |
| 185 | byte* buffer_; |
| 186 | }; |
| 187 | |
| 188 | class StringTable; |
| 189 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 190 | template<typename THeader> |
| 191 | class DebugSectionBase : public ZoneObject { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 192 | public: |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 193 | virtual ~DebugSectionBase() { } |
| 194 | |
| 195 | virtual void WriteBody(Writer::Slot<THeader> header, Writer* writer) { |
| 196 | uintptr_t start = writer->position(); |
| 197 | if (WriteBody(writer)) { |
| 198 | uintptr_t end = writer->position(); |
| 199 | header->offset = start; |
| 200 | #if defined(__MACH_O) |
| 201 | header->addr = 0; |
| 202 | #endif |
| 203 | header->size = end - start; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | virtual bool WriteBody(Writer* writer) { |
| 208 | return false; |
| 209 | } |
| 210 | |
| 211 | typedef THeader Header; |
| 212 | }; |
| 213 | |
| 214 | |
| 215 | struct MachOSectionHeader { |
| 216 | char sectname[16]; |
| 217 | char segname[16]; |
| 218 | #if defined(V8_TARGET_ARCH_IA32) |
| 219 | uint32_t addr; |
| 220 | uint32_t size; |
| 221 | #else |
| 222 | uint64_t addr; |
| 223 | uint64_t size; |
| 224 | #endif |
| 225 | uint32_t offset; |
| 226 | uint32_t align; |
| 227 | uint32_t reloff; |
| 228 | uint32_t nreloc; |
| 229 | uint32_t flags; |
| 230 | uint32_t reserved1; |
| 231 | uint32_t reserved2; |
| 232 | }; |
| 233 | |
| 234 | |
| 235 | class MachOSection : public DebugSectionBase<MachOSectionHeader> { |
| 236 | public: |
| 237 | enum Type { |
| 238 | S_REGULAR = 0x0u, |
| 239 | S_ATTR_COALESCED = 0xbu, |
| 240 | S_ATTR_SOME_INSTRUCTIONS = 0x400u, |
| 241 | S_ATTR_DEBUG = 0x02000000u, |
| 242 | S_ATTR_PURE_INSTRUCTIONS = 0x80000000u |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 243 | }; |
| 244 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 245 | MachOSection(const char* name, |
| 246 | const char* segment, |
| 247 | uintptr_t align, |
| 248 | uint32_t flags) |
| 249 | : name_(name), |
| 250 | segment_(segment), |
| 251 | align_(align), |
| 252 | flags_(flags) { |
| 253 | ASSERT(IsPowerOf2(align)); |
| 254 | if (align_ != 0) { |
| 255 | align_ = WhichPowerOf2(align_); |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | virtual ~MachOSection() { } |
| 260 | |
| 261 | virtual void PopulateHeader(Writer::Slot<Header> header) { |
| 262 | header->addr = 0; |
| 263 | header->size = 0; |
| 264 | header->offset = 0; |
| 265 | header->align = align_; |
| 266 | header->reloff = 0; |
| 267 | header->nreloc = 0; |
| 268 | header->flags = flags_; |
| 269 | header->reserved1 = 0; |
| 270 | header->reserved2 = 0; |
| 271 | memset(header->sectname, 0, sizeof(header->sectname)); |
| 272 | memset(header->segname, 0, sizeof(header->segname)); |
| 273 | ASSERT(strlen(name_) < sizeof(header->sectname)); |
| 274 | ASSERT(strlen(segment_) < sizeof(header->segname)); |
| 275 | strncpy(header->sectname, name_, sizeof(header->sectname)); |
| 276 | strncpy(header->segname, segment_, sizeof(header->segname)); |
| 277 | } |
| 278 | |
| 279 | private: |
| 280 | const char* name_; |
| 281 | const char* segment_; |
| 282 | uintptr_t align_; |
| 283 | uint32_t flags_; |
| 284 | }; |
| 285 | |
| 286 | |
| 287 | struct ELFSectionHeader { |
| 288 | uint32_t name; |
| 289 | uint32_t type; |
| 290 | uintptr_t flags; |
| 291 | uintptr_t address; |
| 292 | uintptr_t offset; |
| 293 | uintptr_t size; |
| 294 | uint32_t link; |
| 295 | uint32_t info; |
| 296 | uintptr_t alignment; |
| 297 | uintptr_t entry_size; |
| 298 | }; |
| 299 | |
| 300 | |
| 301 | #if defined(__ELF) |
| 302 | class ELFSection : public DebugSectionBase<ELFSectionHeader> { |
| 303 | public: |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 304 | enum Type { |
| 305 | TYPE_NULL = 0, |
| 306 | TYPE_PROGBITS = 1, |
| 307 | TYPE_SYMTAB = 2, |
| 308 | TYPE_STRTAB = 3, |
| 309 | TYPE_RELA = 4, |
| 310 | TYPE_HASH = 5, |
| 311 | TYPE_DYNAMIC = 6, |
| 312 | TYPE_NOTE = 7, |
| 313 | TYPE_NOBITS = 8, |
| 314 | TYPE_REL = 9, |
| 315 | TYPE_SHLIB = 10, |
| 316 | TYPE_DYNSYM = 11, |
| 317 | TYPE_LOPROC = 0x70000000, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 318 | TYPE_X86_64_UNWIND = 0x70000001, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 319 | TYPE_HIPROC = 0x7fffffff, |
| 320 | TYPE_LOUSER = 0x80000000, |
| 321 | TYPE_HIUSER = 0xffffffff |
| 322 | }; |
| 323 | |
| 324 | enum Flags { |
| 325 | FLAG_WRITE = 1, |
| 326 | FLAG_ALLOC = 2, |
| 327 | FLAG_EXEC = 4 |
| 328 | }; |
| 329 | |
| 330 | enum SpecialIndexes { |
| 331 | INDEX_ABSOLUTE = 0xfff1 |
| 332 | }; |
| 333 | |
| 334 | ELFSection(const char* name, Type type, uintptr_t align) |
| 335 | : name_(name), type_(type), align_(align) { } |
| 336 | |
| 337 | virtual ~ELFSection() { } |
| 338 | |
| 339 | void PopulateHeader(Writer::Slot<Header> header, StringTable* strtab); |
| 340 | |
| 341 | virtual void WriteBody(Writer::Slot<Header> header, Writer* w) { |
| 342 | uintptr_t start = w->position(); |
| 343 | if (WriteBody(w)) { |
| 344 | uintptr_t end = w->position(); |
| 345 | header->offset = start; |
| 346 | header->size = end - start; |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | virtual bool WriteBody(Writer* w) { |
| 351 | return false; |
| 352 | } |
| 353 | |
| 354 | uint16_t index() const { return index_; } |
| 355 | void set_index(uint16_t index) { index_ = index; } |
| 356 | |
| 357 | protected: |
| 358 | virtual void PopulateHeader(Writer::Slot<Header> header) { |
| 359 | header->flags = 0; |
| 360 | header->address = 0; |
| 361 | header->offset = 0; |
| 362 | header->size = 0; |
| 363 | header->link = 0; |
| 364 | header->info = 0; |
| 365 | header->entry_size = 0; |
| 366 | } |
| 367 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 368 | private: |
| 369 | const char* name_; |
| 370 | Type type_; |
| 371 | uintptr_t align_; |
| 372 | uint16_t index_; |
| 373 | }; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 374 | #endif // defined(__ELF) |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 375 | |
| 376 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 377 | #if defined(__MACH_O) |
| 378 | class MachOTextSection : public MachOSection { |
| 379 | public: |
| 380 | MachOTextSection(uintptr_t align, |
| 381 | uintptr_t addr, |
| 382 | uintptr_t size) |
| 383 | : MachOSection("__text", |
| 384 | "__TEXT", |
| 385 | align, |
| 386 | MachOSection::S_REGULAR | |
| 387 | MachOSection::S_ATTR_SOME_INSTRUCTIONS | |
| 388 | MachOSection::S_ATTR_PURE_INSTRUCTIONS), |
| 389 | addr_(addr), |
| 390 | size_(size) { } |
| 391 | |
| 392 | protected: |
| 393 | virtual void PopulateHeader(Writer::Slot<Header> header) { |
| 394 | MachOSection::PopulateHeader(header); |
| 395 | header->addr = addr_; |
| 396 | header->size = size_; |
| 397 | } |
| 398 | |
| 399 | private: |
| 400 | uintptr_t addr_; |
| 401 | uintptr_t size_; |
| 402 | }; |
| 403 | #endif // defined(__MACH_O) |
| 404 | |
| 405 | |
| 406 | #if defined(__ELF) |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 407 | class FullHeaderELFSection : public ELFSection { |
| 408 | public: |
| 409 | FullHeaderELFSection(const char* name, |
| 410 | Type type, |
| 411 | uintptr_t align, |
| 412 | uintptr_t addr, |
| 413 | uintptr_t offset, |
| 414 | uintptr_t size, |
| 415 | uintptr_t flags) |
| 416 | : ELFSection(name, type, align), |
| 417 | addr_(addr), |
| 418 | offset_(offset), |
| 419 | size_(size), |
| 420 | flags_(flags) { } |
| 421 | |
| 422 | protected: |
| 423 | virtual void PopulateHeader(Writer::Slot<Header> header) { |
| 424 | ELFSection::PopulateHeader(header); |
| 425 | header->address = addr_; |
| 426 | header->offset = offset_; |
| 427 | header->size = size_; |
| 428 | header->flags = flags_; |
| 429 | } |
| 430 | |
| 431 | private: |
| 432 | uintptr_t addr_; |
| 433 | uintptr_t offset_; |
| 434 | uintptr_t size_; |
| 435 | uintptr_t flags_; |
| 436 | }; |
| 437 | |
| 438 | |
| 439 | class StringTable : public ELFSection { |
| 440 | public: |
| 441 | explicit StringTable(const char* name) |
| 442 | : ELFSection(name, TYPE_STRTAB, 1), writer_(NULL), offset_(0), size_(0) { |
| 443 | } |
| 444 | |
| 445 | uintptr_t Add(const char* str) { |
| 446 | if (*str == '\0') return 0; |
| 447 | |
| 448 | uintptr_t offset = size_; |
| 449 | WriteString(str); |
| 450 | return offset; |
| 451 | } |
| 452 | |
| 453 | void AttachWriter(Writer* w) { |
| 454 | writer_ = w; |
| 455 | offset_ = writer_->position(); |
| 456 | |
| 457 | // First entry in the string table should be an empty string. |
| 458 | WriteString(""); |
| 459 | } |
| 460 | |
| 461 | void DetachWriter() { |
| 462 | writer_ = NULL; |
| 463 | } |
| 464 | |
| 465 | virtual void WriteBody(Writer::Slot<Header> header, Writer* w) { |
| 466 | ASSERT(writer_ == NULL); |
| 467 | header->offset = offset_; |
| 468 | header->size = size_; |
| 469 | } |
| 470 | |
| 471 | private: |
| 472 | void WriteString(const char* str) { |
| 473 | uintptr_t written = 0; |
| 474 | do { |
| 475 | writer_->Write(*str); |
| 476 | written++; |
| 477 | } while (*str++); |
| 478 | size_ += written; |
| 479 | } |
| 480 | |
| 481 | Writer* writer_; |
| 482 | |
| 483 | uintptr_t offset_; |
| 484 | uintptr_t size_; |
| 485 | }; |
| 486 | |
| 487 | |
| 488 | void ELFSection::PopulateHeader(Writer::Slot<ELFSection::Header> header, |
| 489 | StringTable* strtab) { |
| 490 | header->name = strtab->Add(name_); |
| 491 | header->type = type_; |
| 492 | header->alignment = align_; |
| 493 | PopulateHeader(header); |
| 494 | } |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 495 | #endif // defined(__ELF) |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 496 | |
| 497 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 498 | #if defined(__MACH_O) |
| 499 | class MachO BASE_EMBEDDED { |
| 500 | public: |
| 501 | MachO() : sections_(6) { } |
| 502 | |
| 503 | uint32_t AddSection(MachOSection* section) { |
| 504 | sections_.Add(section); |
| 505 | return sections_.length() - 1; |
| 506 | } |
| 507 | |
| 508 | void Write(Writer* w, uintptr_t code_start, uintptr_t code_size) { |
| 509 | Writer::Slot<MachOHeader> header = WriteHeader(w); |
| 510 | uintptr_t load_command_start = w->position(); |
| 511 | Writer::Slot<MachOSegmentCommand> cmd = WriteSegmentCommand(w, |
| 512 | code_start, |
| 513 | code_size); |
| 514 | WriteSections(w, cmd, header, load_command_start); |
| 515 | } |
| 516 | |
| 517 | private: |
| 518 | struct MachOHeader { |
| 519 | uint32_t magic; |
| 520 | uint32_t cputype; |
| 521 | uint32_t cpusubtype; |
| 522 | uint32_t filetype; |
| 523 | uint32_t ncmds; |
| 524 | uint32_t sizeofcmds; |
| 525 | uint32_t flags; |
| 526 | #if defined(V8_TARGET_ARCH_X64) |
| 527 | uint32_t reserved; |
| 528 | #endif |
| 529 | }; |
| 530 | |
| 531 | struct MachOSegmentCommand { |
| 532 | uint32_t cmd; |
| 533 | uint32_t cmdsize; |
| 534 | char segname[16]; |
| 535 | #if defined(V8_TARGET_ARCH_IA32) |
| 536 | uint32_t vmaddr; |
| 537 | uint32_t vmsize; |
| 538 | uint32_t fileoff; |
| 539 | uint32_t filesize; |
| 540 | #else |
| 541 | uint64_t vmaddr; |
| 542 | uint64_t vmsize; |
| 543 | uint64_t fileoff; |
| 544 | uint64_t filesize; |
| 545 | #endif |
| 546 | uint32_t maxprot; |
| 547 | uint32_t initprot; |
| 548 | uint32_t nsects; |
| 549 | uint32_t flags; |
| 550 | }; |
| 551 | |
| 552 | enum MachOLoadCommandCmd { |
| 553 | LC_SEGMENT_32 = 0x00000001u, |
| 554 | LC_SEGMENT_64 = 0x00000019u |
| 555 | }; |
| 556 | |
| 557 | |
| 558 | Writer::Slot<MachOHeader> WriteHeader(Writer* w) { |
| 559 | ASSERT(w->position() == 0); |
| 560 | Writer::Slot<MachOHeader> header = w->CreateSlotHere<MachOHeader>(); |
| 561 | #if defined(V8_TARGET_ARCH_IA32) |
| 562 | header->magic = 0xFEEDFACEu; |
| 563 | header->cputype = 7; // i386 |
| 564 | header->cpusubtype = 3; // CPU_SUBTYPE_I386_ALL |
| 565 | #elif defined(V8_TARGET_ARCH_X64) |
| 566 | header->magic = 0xFEEDFACFu; |
| 567 | header->cputype = 7 | 0x01000000; // i386 | 64-bit ABI |
| 568 | header->cpusubtype = 3; // CPU_SUBTYPE_I386_ALL |
| 569 | header->reserved = 0; |
| 570 | #else |
| 571 | #error Unsupported target architecture. |
| 572 | #endif |
| 573 | header->filetype = 0x1; // MH_OBJECT |
| 574 | header->ncmds = 1; |
| 575 | header->sizeofcmds = 0; |
| 576 | header->flags = 0; |
| 577 | return header; |
| 578 | } |
| 579 | |
| 580 | |
| 581 | Writer::Slot<MachOSegmentCommand> WriteSegmentCommand(Writer* w, |
| 582 | uintptr_t code_start, |
| 583 | uintptr_t code_size) { |
| 584 | Writer::Slot<MachOSegmentCommand> cmd = |
| 585 | w->CreateSlotHere<MachOSegmentCommand>(); |
| 586 | #if defined(V8_TARGET_ARCH_IA32) |
| 587 | cmd->cmd = LC_SEGMENT_32; |
| 588 | #else |
| 589 | cmd->cmd = LC_SEGMENT_64; |
| 590 | #endif |
| 591 | cmd->vmaddr = code_start; |
| 592 | cmd->vmsize = code_size; |
| 593 | cmd->fileoff = 0; |
| 594 | cmd->filesize = 0; |
| 595 | cmd->maxprot = 7; |
| 596 | cmd->initprot = 7; |
| 597 | cmd->flags = 0; |
| 598 | cmd->nsects = sections_.length(); |
| 599 | memset(cmd->segname, 0, 16); |
| 600 | cmd->cmdsize = sizeof(MachOSegmentCommand) + sizeof(MachOSection::Header) * |
| 601 | cmd->nsects; |
| 602 | return cmd; |
| 603 | } |
| 604 | |
| 605 | |
| 606 | void WriteSections(Writer* w, |
| 607 | Writer::Slot<MachOSegmentCommand> cmd, |
| 608 | Writer::Slot<MachOHeader> header, |
| 609 | uintptr_t load_command_start) { |
| 610 | Writer::Slot<MachOSection::Header> headers = |
| 611 | w->CreateSlotsHere<MachOSection::Header>(sections_.length()); |
| 612 | cmd->fileoff = w->position(); |
| 613 | header->sizeofcmds = w->position() - load_command_start; |
| 614 | for (int section = 0; section < sections_.length(); ++section) { |
| 615 | sections_[section]->PopulateHeader(headers.at(section)); |
| 616 | sections_[section]->WriteBody(headers.at(section), w); |
| 617 | } |
| 618 | cmd->filesize = w->position() - (uintptr_t)cmd->fileoff; |
| 619 | } |
| 620 | |
| 621 | |
| 622 | ZoneList<MachOSection*> sections_; |
| 623 | }; |
| 624 | #endif // defined(__MACH_O) |
| 625 | |
| 626 | |
| 627 | #if defined(__ELF) |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 628 | class ELF BASE_EMBEDDED { |
| 629 | public: |
| 630 | ELF() : sections_(6) { |
| 631 | sections_.Add(new ELFSection("", ELFSection::TYPE_NULL, 0)); |
| 632 | sections_.Add(new StringTable(".shstrtab")); |
| 633 | } |
| 634 | |
| 635 | void Write(Writer* w) { |
| 636 | WriteHeader(w); |
| 637 | WriteSectionTable(w); |
| 638 | WriteSections(w); |
| 639 | } |
| 640 | |
| 641 | ELFSection* SectionAt(uint32_t index) { |
| 642 | return sections_[index]; |
| 643 | } |
| 644 | |
| 645 | uint32_t AddSection(ELFSection* section) { |
| 646 | sections_.Add(section); |
| 647 | section->set_index(sections_.length() - 1); |
| 648 | return sections_.length() - 1; |
| 649 | } |
| 650 | |
| 651 | private: |
| 652 | struct ELFHeader { |
| 653 | uint8_t ident[16]; |
| 654 | uint16_t type; |
| 655 | uint16_t machine; |
| 656 | uint32_t version; |
| 657 | uintptr_t entry; |
| 658 | uintptr_t pht_offset; |
| 659 | uintptr_t sht_offset; |
| 660 | uint32_t flags; |
| 661 | uint16_t header_size; |
| 662 | uint16_t pht_entry_size; |
| 663 | uint16_t pht_entry_num; |
| 664 | uint16_t sht_entry_size; |
| 665 | uint16_t sht_entry_num; |
| 666 | uint16_t sht_strtab_index; |
| 667 | }; |
| 668 | |
| 669 | |
| 670 | void WriteHeader(Writer* w) { |
| 671 | ASSERT(w->position() == 0); |
| 672 | Writer::Slot<ELFHeader> header = w->CreateSlotHere<ELFHeader>(); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 673 | #if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_ARM) |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 674 | const uint8_t ident[16] = |
| 675 | { 0x7f, 'E', 'L', 'F', 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0}; |
| 676 | #elif defined(V8_TARGET_ARCH_X64) |
| 677 | const uint8_t ident[16] = |
| 678 | { 0x7f, 'E', 'L', 'F', 2, 1, 1, 0, 0, 0 , 0, 0, 0, 0, 0, 0}; |
| 679 | #else |
| 680 | #error Unsupported target architecture. |
| 681 | #endif |
| 682 | memcpy(header->ident, ident, 16); |
| 683 | header->type = 1; |
| 684 | #if defined(V8_TARGET_ARCH_IA32) |
| 685 | header->machine = 3; |
| 686 | #elif defined(V8_TARGET_ARCH_X64) |
| 687 | // Processor identification value for x64 is 62 as defined in |
| 688 | // System V ABI, AMD64 Supplement |
| 689 | // http://www.x86-64.org/documentation/abi.pdf |
| 690 | header->machine = 62; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 691 | #elif defined(V8_TARGET_ARCH_ARM) |
| 692 | // Set to EM_ARM, defined as 40, in "ARM ELF File Format" at |
| 693 | // infocenter.arm.com/help/topic/com.arm.doc.dui0101a/DUI0101A_Elf.pdf |
| 694 | header->machine = 40; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 695 | #else |
| 696 | #error Unsupported target architecture. |
| 697 | #endif |
| 698 | header->version = 1; |
| 699 | header->entry = 0; |
| 700 | header->pht_offset = 0; |
| 701 | header->sht_offset = sizeof(ELFHeader); // Section table follows header. |
| 702 | header->flags = 0; |
| 703 | header->header_size = sizeof(ELFHeader); |
| 704 | header->pht_entry_size = 0; |
| 705 | header->pht_entry_num = 0; |
| 706 | header->sht_entry_size = sizeof(ELFSection::Header); |
| 707 | header->sht_entry_num = sections_.length(); |
| 708 | header->sht_strtab_index = 1; |
| 709 | } |
| 710 | |
| 711 | void WriteSectionTable(Writer* w) { |
| 712 | // Section headers table immediately follows file header. |
| 713 | ASSERT(w->position() == sizeof(ELFHeader)); |
| 714 | |
| 715 | Writer::Slot<ELFSection::Header> headers = |
| 716 | w->CreateSlotsHere<ELFSection::Header>(sections_.length()); |
| 717 | |
| 718 | // String table for section table is the first section. |
| 719 | StringTable* strtab = static_cast<StringTable*>(SectionAt(1)); |
| 720 | strtab->AttachWriter(w); |
| 721 | for (int i = 0, length = sections_.length(); |
| 722 | i < length; |
| 723 | i++) { |
| 724 | sections_[i]->PopulateHeader(headers.at(i), strtab); |
| 725 | } |
| 726 | strtab->DetachWriter(); |
| 727 | } |
| 728 | |
| 729 | int SectionHeaderPosition(uint32_t section_index) { |
| 730 | return sizeof(ELFHeader) + sizeof(ELFSection::Header) * section_index; |
| 731 | } |
| 732 | |
| 733 | void WriteSections(Writer* w) { |
| 734 | Writer::Slot<ELFSection::Header> headers = |
| 735 | w->SlotAt<ELFSection::Header>(sizeof(ELFHeader)); |
| 736 | |
| 737 | for (int i = 0, length = sections_.length(); |
| 738 | i < length; |
| 739 | i++) { |
| 740 | sections_[i]->WriteBody(headers.at(i), w); |
| 741 | } |
| 742 | } |
| 743 | |
| 744 | ZoneList<ELFSection*> sections_; |
| 745 | }; |
| 746 | |
| 747 | |
| 748 | class ELFSymbol BASE_EMBEDDED { |
| 749 | public: |
| 750 | enum Type { |
| 751 | TYPE_NOTYPE = 0, |
| 752 | TYPE_OBJECT = 1, |
| 753 | TYPE_FUNC = 2, |
| 754 | TYPE_SECTION = 3, |
| 755 | TYPE_FILE = 4, |
| 756 | TYPE_LOPROC = 13, |
| 757 | TYPE_HIPROC = 15 |
| 758 | }; |
| 759 | |
| 760 | enum Binding { |
| 761 | BIND_LOCAL = 0, |
| 762 | BIND_GLOBAL = 1, |
| 763 | BIND_WEAK = 2, |
| 764 | BIND_LOPROC = 13, |
| 765 | BIND_HIPROC = 15 |
| 766 | }; |
| 767 | |
| 768 | ELFSymbol(const char* name, |
| 769 | uintptr_t value, |
| 770 | uintptr_t size, |
| 771 | Binding binding, |
| 772 | Type type, |
| 773 | uint16_t section) |
| 774 | : name(name), |
| 775 | value(value), |
| 776 | size(size), |
| 777 | info((binding << 4) | type), |
| 778 | other(0), |
| 779 | section(section) { |
| 780 | } |
| 781 | |
| 782 | Binding binding() const { |
| 783 | return static_cast<Binding>(info >> 4); |
| 784 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 785 | #if defined(V8_TARGET_ARCH_IA32) || defined(V8_TARGET_ARCH_ARM) |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 786 | struct SerializedLayout { |
| 787 | SerializedLayout(uint32_t name, |
| 788 | uintptr_t value, |
| 789 | uintptr_t size, |
| 790 | Binding binding, |
| 791 | Type type, |
| 792 | uint16_t section) |
| 793 | : name(name), |
| 794 | value(value), |
| 795 | size(size), |
| 796 | info((binding << 4) | type), |
| 797 | other(0), |
| 798 | section(section) { |
| 799 | } |
| 800 | |
| 801 | uint32_t name; |
| 802 | uintptr_t value; |
| 803 | uintptr_t size; |
| 804 | uint8_t info; |
| 805 | uint8_t other; |
| 806 | uint16_t section; |
| 807 | }; |
| 808 | #elif defined(V8_TARGET_ARCH_X64) |
| 809 | struct SerializedLayout { |
| 810 | SerializedLayout(uint32_t name, |
| 811 | uintptr_t value, |
| 812 | uintptr_t size, |
| 813 | Binding binding, |
| 814 | Type type, |
| 815 | uint16_t section) |
| 816 | : name(name), |
| 817 | info((binding << 4) | type), |
| 818 | other(0), |
| 819 | section(section), |
| 820 | value(value), |
| 821 | size(size) { |
| 822 | } |
| 823 | |
| 824 | uint32_t name; |
| 825 | uint8_t info; |
| 826 | uint8_t other; |
| 827 | uint16_t section; |
| 828 | uintptr_t value; |
| 829 | uintptr_t size; |
| 830 | }; |
| 831 | #endif |
| 832 | |
| 833 | void Write(Writer::Slot<SerializedLayout> s, StringTable* t) { |
| 834 | // Convert symbol names from strings to indexes in the string table. |
| 835 | s->name = t->Add(name); |
| 836 | s->value = value; |
| 837 | s->size = size; |
| 838 | s->info = info; |
| 839 | s->other = other; |
| 840 | s->section = section; |
| 841 | } |
| 842 | |
| 843 | private: |
| 844 | const char* name; |
| 845 | uintptr_t value; |
| 846 | uintptr_t size; |
| 847 | uint8_t info; |
| 848 | uint8_t other; |
| 849 | uint16_t section; |
| 850 | }; |
| 851 | |
| 852 | |
| 853 | class ELFSymbolTable : public ELFSection { |
| 854 | public: |
| 855 | explicit ELFSymbolTable(const char* name) |
| 856 | : ELFSection(name, TYPE_SYMTAB, sizeof(uintptr_t)), |
| 857 | locals_(1), |
| 858 | globals_(1) { |
| 859 | } |
| 860 | |
| 861 | virtual void WriteBody(Writer::Slot<Header> header, Writer* w) { |
| 862 | w->Align(header->alignment); |
| 863 | int total_symbols = locals_.length() + globals_.length() + 1; |
| 864 | header->offset = w->position(); |
| 865 | |
| 866 | Writer::Slot<ELFSymbol::SerializedLayout> symbols = |
| 867 | w->CreateSlotsHere<ELFSymbol::SerializedLayout>(total_symbols); |
| 868 | |
| 869 | header->size = w->position() - header->offset; |
| 870 | |
| 871 | // String table for this symbol table should follow it in the section table. |
| 872 | StringTable* strtab = |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 873 | static_cast<StringTable*>(w->debug_object()->SectionAt(index() + 1)); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 874 | strtab->AttachWriter(w); |
| 875 | symbols.at(0).set(ELFSymbol::SerializedLayout(0, |
| 876 | 0, |
| 877 | 0, |
| 878 | ELFSymbol::BIND_LOCAL, |
| 879 | ELFSymbol::TYPE_NOTYPE, |
| 880 | 0)); |
| 881 | WriteSymbolsList(&locals_, symbols.at(1), strtab); |
| 882 | WriteSymbolsList(&globals_, symbols.at(locals_.length() + 1), strtab); |
| 883 | strtab->DetachWriter(); |
| 884 | } |
| 885 | |
| 886 | void Add(const ELFSymbol& symbol) { |
| 887 | if (symbol.binding() == ELFSymbol::BIND_LOCAL) { |
| 888 | locals_.Add(symbol); |
| 889 | } else { |
| 890 | globals_.Add(symbol); |
| 891 | } |
| 892 | } |
| 893 | |
| 894 | protected: |
| 895 | virtual void PopulateHeader(Writer::Slot<Header> header) { |
| 896 | ELFSection::PopulateHeader(header); |
| 897 | // We are assuming that string table will follow symbol table. |
| 898 | header->link = index() + 1; |
| 899 | header->info = locals_.length() + 1; |
| 900 | header->entry_size = sizeof(ELFSymbol::SerializedLayout); |
| 901 | } |
| 902 | |
| 903 | private: |
| 904 | void WriteSymbolsList(const ZoneList<ELFSymbol>* src, |
| 905 | Writer::Slot<ELFSymbol::SerializedLayout> dst, |
| 906 | StringTable* strtab) { |
| 907 | for (int i = 0, len = src->length(); |
| 908 | i < len; |
| 909 | i++) { |
| 910 | src->at(i).Write(dst.at(i), strtab); |
| 911 | } |
| 912 | } |
| 913 | |
| 914 | ZoneList<ELFSymbol> locals_; |
| 915 | ZoneList<ELFSymbol> globals_; |
| 916 | }; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 917 | #endif // defined(__ELF) |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 918 | |
| 919 | |
| 920 | class CodeDescription BASE_EMBEDDED { |
| 921 | public: |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 922 | #ifdef V8_TARGET_ARCH_X64 |
| 923 | enum StackState { |
| 924 | POST_RBP_PUSH, |
| 925 | POST_RBP_SET, |
| 926 | POST_RBP_POP, |
| 927 | STACK_STATE_MAX |
| 928 | }; |
| 929 | #endif |
| 930 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 931 | CodeDescription(const char* name, |
| 932 | Code* code, |
| 933 | Handle<Script> script, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 934 | GDBJITLineInfo* lineinfo, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 935 | GDBJITInterface::CodeTag tag, |
| 936 | CompilationInfo* info) |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 937 | : name_(name), |
| 938 | code_(code), |
| 939 | script_(script), |
| 940 | lineinfo_(lineinfo), |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 941 | tag_(tag), |
| 942 | info_(info) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 943 | } |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 944 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 945 | const char* name() const { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 946 | return name_; |
| 947 | } |
| 948 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 949 | GDBJITLineInfo* lineinfo() const { |
| 950 | return lineinfo_; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 951 | } |
| 952 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 953 | GDBJITInterface::CodeTag tag() const { |
| 954 | return tag_; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 955 | } |
| 956 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 957 | CompilationInfo* info() const { |
| 958 | return info_; |
| 959 | } |
| 960 | |
| 961 | bool IsInfoAvailable() const { |
| 962 | return info_ != NULL; |
| 963 | } |
| 964 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 965 | uintptr_t CodeStart() const { |
| 966 | return reinterpret_cast<uintptr_t>(code_->instruction_start()); |
| 967 | } |
| 968 | |
| 969 | uintptr_t CodeEnd() const { |
| 970 | return reinterpret_cast<uintptr_t>(code_->instruction_end()); |
| 971 | } |
| 972 | |
| 973 | uintptr_t CodeSize() const { |
| 974 | return CodeEnd() - CodeStart(); |
| 975 | } |
| 976 | |
| 977 | bool IsLineInfoAvailable() { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 978 | return !script_.is_null() && |
| 979 | script_->source()->IsString() && |
| 980 | script_->HasValidSource() && |
| 981 | script_->name()->IsString() && |
| 982 | lineinfo_ != NULL; |
| 983 | } |
| 984 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 985 | #ifdef V8_TARGET_ARCH_X64 |
| 986 | uintptr_t GetStackStateStartAddress(StackState state) const { |
| 987 | ASSERT(state < STACK_STATE_MAX); |
| 988 | return stack_state_start_addresses_[state]; |
| 989 | } |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 990 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 991 | void SetStackStateStartAddress(StackState state, uintptr_t addr) { |
| 992 | ASSERT(state < STACK_STATE_MAX); |
| 993 | stack_state_start_addresses_[state] = addr; |
| 994 | } |
| 995 | #endif |
| 996 | |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 997 | SmartArrayPointer<char> GetFilename() { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 998 | return String::cast(script_->name())->ToCString(); |
| 999 | } |
| 1000 | |
| 1001 | int GetScriptLineNumber(int pos) { |
| 1002 | return GetScriptLineNumberSafe(script_, pos) + 1; |
| 1003 | } |
| 1004 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1005 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1006 | private: |
| 1007 | const char* name_; |
| 1008 | Code* code_; |
| 1009 | Handle<Script> script_; |
| 1010 | GDBJITLineInfo* lineinfo_; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1011 | GDBJITInterface::CodeTag tag_; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1012 | CompilationInfo* info_; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1013 | #ifdef V8_TARGET_ARCH_X64 |
| 1014 | uintptr_t stack_state_start_addresses_[STACK_STATE_MAX]; |
| 1015 | #endif |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1016 | }; |
| 1017 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1018 | #if defined(__ELF) |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1019 | static void CreateSymbolsTable(CodeDescription* desc, |
| 1020 | ELF* elf, |
| 1021 | int text_section_index) { |
| 1022 | ELFSymbolTable* symtab = new ELFSymbolTable(".symtab"); |
| 1023 | StringTable* strtab = new StringTable(".strtab"); |
| 1024 | |
| 1025 | // Symbol table should be followed by the linked string table. |
| 1026 | elf->AddSection(symtab); |
| 1027 | elf->AddSection(strtab); |
| 1028 | |
| 1029 | symtab->Add(ELFSymbol("V8 Code", |
| 1030 | 0, |
| 1031 | 0, |
| 1032 | ELFSymbol::BIND_LOCAL, |
| 1033 | ELFSymbol::TYPE_FILE, |
| 1034 | ELFSection::INDEX_ABSOLUTE)); |
| 1035 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1036 | symtab->Add(ELFSymbol(desc->name(), |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1037 | 0, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1038 | desc->CodeSize(), |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1039 | ELFSymbol::BIND_GLOBAL, |
| 1040 | ELFSymbol::TYPE_FUNC, |
| 1041 | text_section_index)); |
| 1042 | } |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1043 | #endif // defined(__ELF) |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1044 | |
| 1045 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1046 | class DebugInfoSection : public DebugSection { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1047 | public: |
| 1048 | explicit DebugInfoSection(CodeDescription* desc) |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1049 | #if defined(__ELF) |
| 1050 | : ELFSection(".debug_info", TYPE_PROGBITS, 1), |
| 1051 | #else |
| 1052 | : MachOSection("__debug_info", |
| 1053 | "__DWARF", |
| 1054 | 1, |
| 1055 | MachOSection::S_REGULAR | MachOSection::S_ATTR_DEBUG), |
| 1056 | #endif |
| 1057 | desc_(desc) { } |
| 1058 | |
| 1059 | // DWARF2 standard |
| 1060 | enum DWARF2LocationOp { |
| 1061 | DW_OP_reg0 = 0x50, |
| 1062 | DW_OP_reg1 = 0x51, |
| 1063 | DW_OP_reg2 = 0x52, |
| 1064 | DW_OP_reg3 = 0x53, |
| 1065 | DW_OP_reg4 = 0x54, |
| 1066 | DW_OP_reg5 = 0x55, |
| 1067 | DW_OP_reg6 = 0x56, |
| 1068 | DW_OP_reg7 = 0x57, |
| 1069 | DW_OP_fbreg = 0x91 // 1 param: SLEB128 offset |
| 1070 | }; |
| 1071 | |
| 1072 | enum DWARF2Encoding { |
| 1073 | DW_ATE_ADDRESS = 0x1, |
| 1074 | DW_ATE_SIGNED = 0x5 |
| 1075 | }; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1076 | |
| 1077 | bool WriteBody(Writer* w) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1078 | uintptr_t cu_start = w->position(); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1079 | Writer::Slot<uint32_t> size = w->CreateSlotHere<uint32_t>(); |
| 1080 | uintptr_t start = w->position(); |
| 1081 | w->Write<uint16_t>(2); // DWARF version. |
| 1082 | w->Write<uint32_t>(0); // Abbreviation table offset. |
| 1083 | w->Write<uint8_t>(sizeof(intptr_t)); |
| 1084 | |
| 1085 | w->WriteULEB128(1); // Abbreviation code. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1086 | w->WriteString(*desc_->GetFilename()); |
| 1087 | w->Write<intptr_t>(desc_->CodeStart()); |
| 1088 | w->Write<intptr_t>(desc_->CodeStart() + desc_->CodeSize()); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1089 | w->Write<uint32_t>(0); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1090 | |
| 1091 | uint32_t ty_offset = static_cast<uint32_t>(w->position() - cu_start); |
| 1092 | w->WriteULEB128(3); |
| 1093 | w->Write<uint8_t>(kPointerSize); |
| 1094 | w->WriteString("v8value"); |
| 1095 | |
| 1096 | if (desc_->IsInfoAvailable()) { |
| 1097 | CompilationInfo* info = desc_->info(); |
| 1098 | ScopeInfo<FreeStoreAllocationPolicy> scope_info(info->scope()); |
| 1099 | w->WriteULEB128(2); |
| 1100 | w->WriteString(desc_->name()); |
| 1101 | w->Write<intptr_t>(desc_->CodeStart()); |
| 1102 | w->Write<intptr_t>(desc_->CodeStart() + desc_->CodeSize()); |
| 1103 | Writer::Slot<uint32_t> fb_block_size = w->CreateSlotHere<uint32_t>(); |
| 1104 | uintptr_t fb_block_start = w->position(); |
| 1105 | #if defined(V8_TARGET_ARCH_IA32) |
| 1106 | w->Write<uint8_t>(DW_OP_reg5); // The frame pointer's here on ia32 |
| 1107 | #elif defined(V8_TARGET_ARCH_X64) |
| 1108 | w->Write<uint8_t>(DW_OP_reg6); // and here on x64. |
| 1109 | #else |
| 1110 | #error Unsupported target architecture. |
| 1111 | #endif |
| 1112 | fb_block_size.set(static_cast<uint32_t>(w->position() - fb_block_start)); |
| 1113 | |
| 1114 | int params = scope_info.number_of_parameters(); |
| 1115 | int slots = scope_info.number_of_stack_slots(); |
| 1116 | int context_slots = scope_info.number_of_context_slots(); |
| 1117 | // The real slot ID is internal_slots + context_slot_id. |
| 1118 | int internal_slots = Context::MIN_CONTEXT_SLOTS; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1119 | int locals = scope_info.LocalCount(); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1120 | int current_abbreviation = 4; |
| 1121 | |
| 1122 | for (int param = 0; param < params; ++param) { |
| 1123 | w->WriteULEB128(current_abbreviation++); |
| 1124 | w->WriteString( |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1125 | *scope_info.ParameterName(param)->ToCString(DISALLOW_NULLS)); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1126 | w->Write<uint32_t>(ty_offset); |
| 1127 | Writer::Slot<uint32_t> block_size = w->CreateSlotHere<uint32_t>(); |
| 1128 | uintptr_t block_start = w->position(); |
| 1129 | w->Write<uint8_t>(DW_OP_fbreg); |
| 1130 | w->WriteSLEB128( |
| 1131 | JavaScriptFrameConstants::kLastParameterOffset + |
| 1132 | kPointerSize * (params - param - 1)); |
| 1133 | block_size.set(static_cast<uint32_t>(w->position() - block_start)); |
| 1134 | } |
| 1135 | |
| 1136 | EmbeddedVector<char, 256> buffer; |
| 1137 | StringBuilder builder(buffer.start(), buffer.length()); |
| 1138 | |
| 1139 | for (int slot = 0; slot < slots; ++slot) { |
| 1140 | w->WriteULEB128(current_abbreviation++); |
| 1141 | builder.Reset(); |
| 1142 | builder.AddFormatted("slot%d", slot); |
| 1143 | w->WriteString(builder.Finalize()); |
| 1144 | } |
| 1145 | |
| 1146 | // See contexts.h for more information. |
| 1147 | ASSERT(Context::MIN_CONTEXT_SLOTS == 4); |
| 1148 | ASSERT(Context::CLOSURE_INDEX == 0); |
| 1149 | ASSERT(Context::PREVIOUS_INDEX == 1); |
| 1150 | ASSERT(Context::EXTENSION_INDEX == 2); |
| 1151 | ASSERT(Context::GLOBAL_INDEX == 3); |
| 1152 | w->WriteULEB128(current_abbreviation++); |
| 1153 | w->WriteString(".closure"); |
| 1154 | w->WriteULEB128(current_abbreviation++); |
| 1155 | w->WriteString(".previous"); |
| 1156 | w->WriteULEB128(current_abbreviation++); |
| 1157 | w->WriteString(".extension"); |
| 1158 | w->WriteULEB128(current_abbreviation++); |
| 1159 | w->WriteString(".global"); |
| 1160 | |
| 1161 | for (int context_slot = 0; |
| 1162 | context_slot < context_slots; |
| 1163 | ++context_slot) { |
| 1164 | w->WriteULEB128(current_abbreviation++); |
| 1165 | builder.Reset(); |
| 1166 | builder.AddFormatted("context_slot%d", context_slot + internal_slots); |
| 1167 | w->WriteString(builder.Finalize()); |
| 1168 | } |
| 1169 | |
| 1170 | for (int local = 0; local < locals; ++local) { |
| 1171 | w->WriteULEB128(current_abbreviation++); |
| 1172 | w->WriteString( |
| 1173 | *scope_info.LocalName(local)->ToCString(DISALLOW_NULLS)); |
| 1174 | w->Write<uint32_t>(ty_offset); |
| 1175 | Writer::Slot<uint32_t> block_size = w->CreateSlotHere<uint32_t>(); |
| 1176 | uintptr_t block_start = w->position(); |
| 1177 | w->Write<uint8_t>(DW_OP_fbreg); |
| 1178 | w->WriteSLEB128( |
| 1179 | JavaScriptFrameConstants::kLocal0Offset - |
| 1180 | kPointerSize * local); |
| 1181 | block_size.set(static_cast<uint32_t>(w->position() - block_start)); |
| 1182 | } |
| 1183 | |
| 1184 | { |
| 1185 | w->WriteULEB128(current_abbreviation++); |
| 1186 | w->WriteString("__function"); |
| 1187 | w->Write<uint32_t>(ty_offset); |
| 1188 | Writer::Slot<uint32_t> block_size = w->CreateSlotHere<uint32_t>(); |
| 1189 | uintptr_t block_start = w->position(); |
| 1190 | w->Write<uint8_t>(DW_OP_fbreg); |
| 1191 | w->WriteSLEB128(JavaScriptFrameConstants::kFunctionOffset); |
| 1192 | block_size.set(static_cast<uint32_t>(w->position() - block_start)); |
| 1193 | } |
| 1194 | |
| 1195 | { |
| 1196 | w->WriteULEB128(current_abbreviation++); |
| 1197 | w->WriteString("__context"); |
| 1198 | w->Write<uint32_t>(ty_offset); |
| 1199 | Writer::Slot<uint32_t> block_size = w->CreateSlotHere<uint32_t>(); |
| 1200 | uintptr_t block_start = w->position(); |
| 1201 | w->Write<uint8_t>(DW_OP_fbreg); |
| 1202 | w->WriteSLEB128(StandardFrameConstants::kContextOffset); |
| 1203 | block_size.set(static_cast<uint32_t>(w->position() - block_start)); |
| 1204 | } |
| 1205 | } |
| 1206 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1207 | size.set(static_cast<uint32_t>(w->position() - start)); |
| 1208 | return true; |
| 1209 | } |
| 1210 | |
| 1211 | private: |
| 1212 | CodeDescription* desc_; |
| 1213 | }; |
| 1214 | |
| 1215 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1216 | class DebugAbbrevSection : public DebugSection { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1217 | public: |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1218 | explicit DebugAbbrevSection(CodeDescription* desc) |
| 1219 | #ifdef __ELF |
| 1220 | : ELFSection(".debug_abbrev", TYPE_PROGBITS, 1), |
| 1221 | #else |
| 1222 | : MachOSection("__debug_abbrev", |
| 1223 | "__DWARF", |
| 1224 | 1, |
| 1225 | MachOSection::S_REGULAR | MachOSection::S_ATTR_DEBUG), |
| 1226 | #endif |
| 1227 | desc_(desc) { } |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1228 | |
| 1229 | // DWARF2 standard, figure 14. |
| 1230 | enum DWARF2Tags { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1231 | DW_TAG_FORMAL_PARAMETER = 0x05, |
| 1232 | DW_TAG_POINTER_TYPE = 0xf, |
| 1233 | DW_TAG_COMPILE_UNIT = 0x11, |
| 1234 | DW_TAG_STRUCTURE_TYPE = 0x13, |
| 1235 | DW_TAG_BASE_TYPE = 0x24, |
| 1236 | DW_TAG_SUBPROGRAM = 0x2e, |
| 1237 | DW_TAG_VARIABLE = 0x34 |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1238 | }; |
| 1239 | |
| 1240 | // DWARF2 standard, figure 16. |
| 1241 | enum DWARF2ChildrenDetermination { |
| 1242 | DW_CHILDREN_NO = 0, |
| 1243 | DW_CHILDREN_YES = 1 |
| 1244 | }; |
| 1245 | |
| 1246 | // DWARF standard, figure 17. |
| 1247 | enum DWARF2Attribute { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1248 | DW_AT_LOCATION = 0x2, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1249 | DW_AT_NAME = 0x3, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1250 | DW_AT_BYTE_SIZE = 0xb, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1251 | DW_AT_STMT_LIST = 0x10, |
| 1252 | DW_AT_LOW_PC = 0x11, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1253 | DW_AT_HIGH_PC = 0x12, |
| 1254 | DW_AT_ENCODING = 0x3e, |
| 1255 | DW_AT_FRAME_BASE = 0x40, |
| 1256 | DW_AT_TYPE = 0x49 |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1257 | }; |
| 1258 | |
| 1259 | // DWARF2 standard, figure 19. |
| 1260 | enum DWARF2AttributeForm { |
| 1261 | DW_FORM_ADDR = 0x1, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1262 | DW_FORM_BLOCK4 = 0x4, |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1263 | DW_FORM_STRING = 0x8, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1264 | DW_FORM_DATA4 = 0x6, |
| 1265 | DW_FORM_BLOCK = 0x9, |
| 1266 | DW_FORM_DATA1 = 0xb, |
| 1267 | DW_FORM_FLAG = 0xc, |
| 1268 | DW_FORM_REF4 = 0x13 |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1269 | }; |
| 1270 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1271 | void WriteVariableAbbreviation(Writer* w, |
| 1272 | int abbreviation_code, |
| 1273 | bool has_value, |
| 1274 | bool is_parameter) { |
| 1275 | w->WriteULEB128(abbreviation_code); |
| 1276 | w->WriteULEB128(is_parameter ? DW_TAG_FORMAL_PARAMETER : DW_TAG_VARIABLE); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1277 | w->Write<uint8_t>(DW_CHILDREN_NO); |
| 1278 | w->WriteULEB128(DW_AT_NAME); |
| 1279 | w->WriteULEB128(DW_FORM_STRING); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1280 | if (has_value) { |
| 1281 | w->WriteULEB128(DW_AT_TYPE); |
| 1282 | w->WriteULEB128(DW_FORM_REF4); |
| 1283 | w->WriteULEB128(DW_AT_LOCATION); |
| 1284 | w->WriteULEB128(DW_FORM_BLOCK4); |
| 1285 | } |
| 1286 | w->WriteULEB128(0); |
| 1287 | w->WriteULEB128(0); |
| 1288 | } |
| 1289 | |
| 1290 | bool WriteBody(Writer* w) { |
| 1291 | int current_abbreviation = 1; |
| 1292 | bool extra_info = desc_->IsInfoAvailable(); |
| 1293 | ASSERT(desc_->IsLineInfoAvailable()); |
| 1294 | w->WriteULEB128(current_abbreviation++); |
| 1295 | w->WriteULEB128(DW_TAG_COMPILE_UNIT); |
| 1296 | w->Write<uint8_t>(extra_info ? DW_CHILDREN_YES : DW_CHILDREN_NO); |
| 1297 | w->WriteULEB128(DW_AT_NAME); |
| 1298 | w->WriteULEB128(DW_FORM_STRING); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1299 | w->WriteULEB128(DW_AT_LOW_PC); |
| 1300 | w->WriteULEB128(DW_FORM_ADDR); |
| 1301 | w->WriteULEB128(DW_AT_HIGH_PC); |
| 1302 | w->WriteULEB128(DW_FORM_ADDR); |
| 1303 | w->WriteULEB128(DW_AT_STMT_LIST); |
| 1304 | w->WriteULEB128(DW_FORM_DATA4); |
| 1305 | w->WriteULEB128(0); |
| 1306 | w->WriteULEB128(0); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1307 | |
| 1308 | if (extra_info) { |
| 1309 | CompilationInfo* info = desc_->info(); |
| 1310 | ScopeInfo<FreeStoreAllocationPolicy> scope_info(info->scope()); |
| 1311 | int params = scope_info.number_of_parameters(); |
| 1312 | int slots = scope_info.number_of_stack_slots(); |
| 1313 | int context_slots = scope_info.number_of_context_slots(); |
| 1314 | // The real slot ID is internal_slots + context_slot_id. |
| 1315 | int internal_slots = Context::MIN_CONTEXT_SLOTS; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1316 | int locals = scope_info.LocalCount(); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1317 | int total_children = |
| 1318 | params + slots + context_slots + internal_slots + locals + 2; |
| 1319 | |
| 1320 | // The extra duplication below seems to be necessary to keep |
| 1321 | // gdb from getting upset on OSX. |
| 1322 | w->WriteULEB128(current_abbreviation++); // Abbreviation code. |
| 1323 | w->WriteULEB128(DW_TAG_SUBPROGRAM); |
| 1324 | w->Write<uint8_t>( |
| 1325 | total_children != 0 ? DW_CHILDREN_YES : DW_CHILDREN_NO); |
| 1326 | w->WriteULEB128(DW_AT_NAME); |
| 1327 | w->WriteULEB128(DW_FORM_STRING); |
| 1328 | w->WriteULEB128(DW_AT_LOW_PC); |
| 1329 | w->WriteULEB128(DW_FORM_ADDR); |
| 1330 | w->WriteULEB128(DW_AT_HIGH_PC); |
| 1331 | w->WriteULEB128(DW_FORM_ADDR); |
| 1332 | w->WriteULEB128(DW_AT_FRAME_BASE); |
| 1333 | w->WriteULEB128(DW_FORM_BLOCK4); |
| 1334 | w->WriteULEB128(0); |
| 1335 | w->WriteULEB128(0); |
| 1336 | |
| 1337 | w->WriteULEB128(current_abbreviation++); |
| 1338 | w->WriteULEB128(DW_TAG_STRUCTURE_TYPE); |
| 1339 | w->Write<uint8_t>(DW_CHILDREN_NO); |
| 1340 | w->WriteULEB128(DW_AT_BYTE_SIZE); |
| 1341 | w->WriteULEB128(DW_FORM_DATA1); |
| 1342 | w->WriteULEB128(DW_AT_NAME); |
| 1343 | w->WriteULEB128(DW_FORM_STRING); |
| 1344 | w->WriteULEB128(0); |
| 1345 | w->WriteULEB128(0); |
| 1346 | |
| 1347 | for (int param = 0; param < params; ++param) { |
| 1348 | WriteVariableAbbreviation(w, current_abbreviation++, true, true); |
| 1349 | } |
| 1350 | |
| 1351 | for (int slot = 0; slot < slots; ++slot) { |
| 1352 | WriteVariableAbbreviation(w, current_abbreviation++, false, false); |
| 1353 | } |
| 1354 | |
| 1355 | for (int internal_slot = 0; |
| 1356 | internal_slot < internal_slots; |
| 1357 | ++internal_slot) { |
| 1358 | WriteVariableAbbreviation(w, current_abbreviation++, false, false); |
| 1359 | } |
| 1360 | |
| 1361 | for (int context_slot = 0; |
| 1362 | context_slot < context_slots; |
| 1363 | ++context_slot) { |
| 1364 | WriteVariableAbbreviation(w, current_abbreviation++, false, false); |
| 1365 | } |
| 1366 | |
| 1367 | for (int local = 0; local < locals; ++local) { |
| 1368 | WriteVariableAbbreviation(w, current_abbreviation++, true, false); |
| 1369 | } |
| 1370 | |
| 1371 | // The function. |
| 1372 | WriteVariableAbbreviation(w, current_abbreviation++, true, false); |
| 1373 | |
| 1374 | // The context. |
| 1375 | WriteVariableAbbreviation(w, current_abbreviation++, true, false); |
| 1376 | |
| 1377 | if (total_children != 0) { |
| 1378 | w->WriteULEB128(0); // Terminate the sibling list. |
| 1379 | } |
| 1380 | } |
| 1381 | |
| 1382 | w->WriteULEB128(0); // Terminate the table. |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1383 | return true; |
| 1384 | } |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1385 | |
| 1386 | private: |
| 1387 | CodeDescription* desc_; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1388 | }; |
| 1389 | |
| 1390 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1391 | class DebugLineSection : public DebugSection { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1392 | public: |
| 1393 | explicit DebugLineSection(CodeDescription* desc) |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1394 | #ifdef __ELF |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1395 | : ELFSection(".debug_line", TYPE_PROGBITS, 1), |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1396 | #else |
| 1397 | : MachOSection("__debug_line", |
| 1398 | "__DWARF", |
| 1399 | 1, |
| 1400 | MachOSection::S_REGULAR | MachOSection::S_ATTR_DEBUG), |
| 1401 | #endif |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1402 | desc_(desc) { } |
| 1403 | |
| 1404 | // DWARF2 standard, figure 34. |
| 1405 | enum DWARF2Opcodes { |
| 1406 | DW_LNS_COPY = 1, |
| 1407 | DW_LNS_ADVANCE_PC = 2, |
| 1408 | DW_LNS_ADVANCE_LINE = 3, |
| 1409 | DW_LNS_SET_FILE = 4, |
| 1410 | DW_LNS_SET_COLUMN = 5, |
| 1411 | DW_LNS_NEGATE_STMT = 6 |
| 1412 | }; |
| 1413 | |
| 1414 | // DWARF2 standard, figure 35. |
| 1415 | enum DWARF2ExtendedOpcode { |
| 1416 | DW_LNE_END_SEQUENCE = 1, |
| 1417 | DW_LNE_SET_ADDRESS = 2, |
| 1418 | DW_LNE_DEFINE_FILE = 3 |
| 1419 | }; |
| 1420 | |
| 1421 | bool WriteBody(Writer* w) { |
| 1422 | // Write prologue. |
| 1423 | Writer::Slot<uint32_t> total_length = w->CreateSlotHere<uint32_t>(); |
| 1424 | uintptr_t start = w->position(); |
| 1425 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1426 | // Used for special opcodes |
| 1427 | const int8_t line_base = 1; |
| 1428 | const uint8_t line_range = 7; |
| 1429 | const int8_t max_line_incr = (line_base + line_range - 1); |
| 1430 | const uint8_t opcode_base = DW_LNS_NEGATE_STMT + 1; |
| 1431 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1432 | w->Write<uint16_t>(2); // Field version. |
| 1433 | Writer::Slot<uint32_t> prologue_length = w->CreateSlotHere<uint32_t>(); |
| 1434 | uintptr_t prologue_start = w->position(); |
| 1435 | w->Write<uint8_t>(1); // Field minimum_instruction_length. |
| 1436 | w->Write<uint8_t>(1); // Field default_is_stmt. |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1437 | w->Write<int8_t>(line_base); // Field line_base. |
| 1438 | w->Write<uint8_t>(line_range); // Field line_range. |
| 1439 | w->Write<uint8_t>(opcode_base); // Field opcode_base. |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1440 | w->Write<uint8_t>(0); // DW_LNS_COPY operands count. |
| 1441 | w->Write<uint8_t>(1); // DW_LNS_ADVANCE_PC operands count. |
| 1442 | w->Write<uint8_t>(1); // DW_LNS_ADVANCE_LINE operands count. |
| 1443 | w->Write<uint8_t>(1); // DW_LNS_SET_FILE operands count. |
| 1444 | w->Write<uint8_t>(1); // DW_LNS_SET_COLUMN operands count. |
| 1445 | w->Write<uint8_t>(0); // DW_LNS_NEGATE_STMT operands count. |
| 1446 | w->Write<uint8_t>(0); // Empty include_directories sequence. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1447 | w->WriteString(*desc_->GetFilename()); // File name. |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1448 | w->WriteULEB128(0); // Current directory. |
| 1449 | w->WriteULEB128(0); // Unknown modification time. |
| 1450 | w->WriteULEB128(0); // Unknown file size. |
| 1451 | w->Write<uint8_t>(0); |
| 1452 | prologue_length.set(static_cast<uint32_t>(w->position() - prologue_start)); |
| 1453 | |
| 1454 | WriteExtendedOpcode(w, DW_LNE_SET_ADDRESS, sizeof(intptr_t)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1455 | w->Write<intptr_t>(desc_->CodeStart()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1456 | w->Write<uint8_t>(DW_LNS_COPY); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1457 | |
| 1458 | intptr_t pc = 0; |
| 1459 | intptr_t line = 1; |
| 1460 | bool is_statement = true; |
| 1461 | |
| 1462 | List<GDBJITLineInfo::PCInfo>* pc_info = desc_->lineinfo()->pc_info(); |
| 1463 | pc_info->Sort(&ComparePCInfo); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1464 | |
| 1465 | int pc_info_length = pc_info->length(); |
| 1466 | for (int i = 0; i < pc_info_length; i++) { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1467 | GDBJITLineInfo::PCInfo* info = &pc_info->at(i); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1468 | ASSERT(info->pc_ >= pc); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1469 | |
| 1470 | // Reduce bloating in the debug line table by removing duplicate line |
| 1471 | // entries (per DWARF2 standard). |
| 1472 | intptr_t new_line = desc_->GetScriptLineNumber(info->pos_); |
| 1473 | if (new_line == line) { |
| 1474 | continue; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1475 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1476 | |
| 1477 | // Mark statement boundaries. For a better debugging experience, mark |
| 1478 | // the last pc address in the function as a statement (e.g. "}"), so that |
| 1479 | // a user can see the result of the last line executed in the function, |
| 1480 | // should control reach the end. |
| 1481 | if ((i+1) == pc_info_length) { |
| 1482 | if (!is_statement) { |
| 1483 | w->Write<uint8_t>(DW_LNS_NEGATE_STMT); |
| 1484 | } |
| 1485 | } else if (is_statement != info->is_statement_) { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1486 | w->Write<uint8_t>(DW_LNS_NEGATE_STMT); |
| 1487 | is_statement = !is_statement; |
| 1488 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1489 | |
| 1490 | // Generate special opcodes, if possible. This results in more compact |
| 1491 | // debug line tables. See the DWARF 2.0 standard to learn more about |
| 1492 | // special opcodes. |
| 1493 | uintptr_t pc_diff = info->pc_ - pc; |
| 1494 | intptr_t line_diff = new_line - line; |
| 1495 | |
| 1496 | // Compute special opcode (see DWARF 2.0 standard) |
| 1497 | intptr_t special_opcode = (line_diff - line_base) + |
| 1498 | (line_range * pc_diff) + opcode_base; |
| 1499 | |
| 1500 | // If special_opcode is less than or equal to 255, it can be used as a |
| 1501 | // special opcode. If line_diff is larger than the max line increment |
| 1502 | // allowed for a special opcode, or if line_diff is less than the minimum |
| 1503 | // line that can be added to the line register (i.e. line_base), then |
| 1504 | // special_opcode can't be used. |
| 1505 | if ((special_opcode >= opcode_base) && (special_opcode <= 255) && |
| 1506 | (line_diff <= max_line_incr) && (line_diff >= line_base)) { |
| 1507 | w->Write<uint8_t>(special_opcode); |
| 1508 | } else { |
| 1509 | w->Write<uint8_t>(DW_LNS_ADVANCE_PC); |
| 1510 | w->WriteSLEB128(pc_diff); |
| 1511 | w->Write<uint8_t>(DW_LNS_ADVANCE_LINE); |
| 1512 | w->WriteSLEB128(line_diff); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1513 | w->Write<uint8_t>(DW_LNS_COPY); |
| 1514 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1515 | |
| 1516 | // Increment the pc and line operands. |
| 1517 | pc += pc_diff; |
| 1518 | line += line_diff; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1519 | } |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1520 | // Advance the pc to the end of the routine, since the end sequence opcode |
| 1521 | // requires this. |
| 1522 | w->Write<uint8_t>(DW_LNS_ADVANCE_PC); |
| 1523 | w->WriteSLEB128(desc_->CodeSize() - pc); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1524 | WriteExtendedOpcode(w, DW_LNE_END_SEQUENCE, 0); |
| 1525 | total_length.set(static_cast<uint32_t>(w->position() - start)); |
| 1526 | return true; |
| 1527 | } |
| 1528 | |
| 1529 | private: |
| 1530 | void WriteExtendedOpcode(Writer* w, |
| 1531 | DWARF2ExtendedOpcode op, |
| 1532 | size_t operands_size) { |
| 1533 | w->Write<uint8_t>(0); |
| 1534 | w->WriteULEB128(operands_size + 1); |
| 1535 | w->Write<uint8_t>(op); |
| 1536 | } |
| 1537 | |
| 1538 | static int ComparePCInfo(const GDBJITLineInfo::PCInfo* a, |
| 1539 | const GDBJITLineInfo::PCInfo* b) { |
| 1540 | if (a->pc_ == b->pc_) { |
| 1541 | if (a->is_statement_ != b->is_statement_) { |
| 1542 | return b->is_statement_ ? +1 : -1; |
| 1543 | } |
| 1544 | return 0; |
| 1545 | } else if (a->pc_ > b->pc_) { |
| 1546 | return +1; |
| 1547 | } else { |
| 1548 | return -1; |
| 1549 | } |
| 1550 | } |
| 1551 | |
| 1552 | CodeDescription* desc_; |
| 1553 | }; |
| 1554 | |
| 1555 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1556 | #ifdef V8_TARGET_ARCH_X64 |
| 1557 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1558 | class UnwindInfoSection : public DebugSection { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1559 | public: |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1560 | explicit UnwindInfoSection(CodeDescription* desc); |
| 1561 | virtual bool WriteBody(Writer* w); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1562 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1563 | int WriteCIE(Writer* w); |
| 1564 | void WriteFDE(Writer* w, int); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1565 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1566 | void WriteFDEStateOnEntry(Writer* w); |
| 1567 | void WriteFDEStateAfterRBPPush(Writer* w); |
| 1568 | void WriteFDEStateAfterRBPSet(Writer* w); |
| 1569 | void WriteFDEStateAfterRBPPop(Writer* w); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1570 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1571 | void WriteLength(Writer* w, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1572 | Writer::Slot<uint32_t>* length_slot, |
| 1573 | int initial_position); |
| 1574 | |
| 1575 | private: |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1576 | CodeDescription* desc_; |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1577 | |
| 1578 | // DWARF3 Specification, Table 7.23 |
| 1579 | enum CFIInstructions { |
| 1580 | DW_CFA_ADVANCE_LOC = 0x40, |
| 1581 | DW_CFA_OFFSET = 0x80, |
| 1582 | DW_CFA_RESTORE = 0xC0, |
| 1583 | DW_CFA_NOP = 0x00, |
| 1584 | DW_CFA_SET_LOC = 0x01, |
| 1585 | DW_CFA_ADVANCE_LOC1 = 0x02, |
| 1586 | DW_CFA_ADVANCE_LOC2 = 0x03, |
| 1587 | DW_CFA_ADVANCE_LOC4 = 0x04, |
| 1588 | DW_CFA_OFFSET_EXTENDED = 0x05, |
| 1589 | DW_CFA_RESTORE_EXTENDED = 0x06, |
| 1590 | DW_CFA_UNDEFINED = 0x07, |
| 1591 | DW_CFA_SAME_VALUE = 0x08, |
| 1592 | DW_CFA_REGISTER = 0x09, |
| 1593 | DW_CFA_REMEMBER_STATE = 0x0A, |
| 1594 | DW_CFA_RESTORE_STATE = 0x0B, |
| 1595 | DW_CFA_DEF_CFA = 0x0C, |
| 1596 | DW_CFA_DEF_CFA_REGISTER = 0x0D, |
| 1597 | DW_CFA_DEF_CFA_OFFSET = 0x0E, |
| 1598 | |
| 1599 | DW_CFA_DEF_CFA_EXPRESSION = 0x0F, |
| 1600 | DW_CFA_EXPRESSION = 0x10, |
| 1601 | DW_CFA_OFFSET_EXTENDED_SF = 0x11, |
| 1602 | DW_CFA_DEF_CFA_SF = 0x12, |
| 1603 | DW_CFA_DEF_CFA_OFFSET_SF = 0x13, |
| 1604 | DW_CFA_VAL_OFFSET = 0x14, |
| 1605 | DW_CFA_VAL_OFFSET_SF = 0x15, |
| 1606 | DW_CFA_VAL_EXPRESSION = 0x16 |
| 1607 | }; |
| 1608 | |
| 1609 | // System V ABI, AMD64 Supplement, Version 0.99.5, Figure 3.36 |
| 1610 | enum RegisterMapping { |
| 1611 | // Only the relevant ones have been added to reduce clutter. |
| 1612 | AMD64_RBP = 6, |
| 1613 | AMD64_RSP = 7, |
| 1614 | AMD64_RA = 16 |
| 1615 | }; |
| 1616 | |
| 1617 | enum CFIConstants { |
| 1618 | CIE_ID = 0, |
| 1619 | CIE_VERSION = 1, |
| 1620 | CODE_ALIGN_FACTOR = 1, |
| 1621 | DATA_ALIGN_FACTOR = 1, |
| 1622 | RETURN_ADDRESS_REGISTER = AMD64_RA |
| 1623 | }; |
| 1624 | }; |
| 1625 | |
| 1626 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1627 | void UnwindInfoSection::WriteLength(Writer* w, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1628 | Writer::Slot<uint32_t>* length_slot, |
| 1629 | int initial_position) { |
| 1630 | uint32_t align = (w->position() - initial_position) % kPointerSize; |
| 1631 | |
| 1632 | if (align != 0) { |
| 1633 | for (uint32_t i = 0; i < (kPointerSize - align); i++) { |
| 1634 | w->Write<uint8_t>(DW_CFA_NOP); |
| 1635 | } |
| 1636 | } |
| 1637 | |
| 1638 | ASSERT((w->position() - initial_position) % kPointerSize == 0); |
| 1639 | length_slot->set(w->position() - initial_position); |
| 1640 | } |
| 1641 | |
| 1642 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1643 | UnwindInfoSection::UnwindInfoSection(CodeDescription* desc) |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1644 | #ifdef __ELF |
| 1645 | : ELFSection(".eh_frame", TYPE_X86_64_UNWIND, 1), |
| 1646 | #else |
| 1647 | : MachOSection("__eh_frame", "__TEXT", sizeof(uintptr_t), |
| 1648 | MachOSection::S_REGULAR), |
| 1649 | #endif |
| 1650 | desc_(desc) { } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1651 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1652 | int UnwindInfoSection::WriteCIE(Writer* w) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1653 | Writer::Slot<uint32_t> cie_length_slot = w->CreateSlotHere<uint32_t>(); |
| 1654 | uint32_t cie_position = w->position(); |
| 1655 | |
| 1656 | // Write out the CIE header. Currently no 'common instructions' are |
| 1657 | // emitted onto the CIE; every FDE has its own set of instructions. |
| 1658 | |
| 1659 | w->Write<uint32_t>(CIE_ID); |
| 1660 | w->Write<uint8_t>(CIE_VERSION); |
| 1661 | w->Write<uint8_t>(0); // Null augmentation string. |
| 1662 | w->WriteSLEB128(CODE_ALIGN_FACTOR); |
| 1663 | w->WriteSLEB128(DATA_ALIGN_FACTOR); |
| 1664 | w->Write<uint8_t>(RETURN_ADDRESS_REGISTER); |
| 1665 | |
| 1666 | WriteLength(w, &cie_length_slot, cie_position); |
| 1667 | |
| 1668 | return cie_position; |
| 1669 | } |
| 1670 | |
| 1671 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1672 | void UnwindInfoSection::WriteFDE(Writer* w, int cie_position) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1673 | // The only FDE for this function. The CFA is the current RBP. |
| 1674 | Writer::Slot<uint32_t> fde_length_slot = w->CreateSlotHere<uint32_t>(); |
| 1675 | int fde_position = w->position(); |
| 1676 | w->Write<int32_t>(fde_position - cie_position + 4); |
| 1677 | |
| 1678 | w->Write<uintptr_t>(desc_->CodeStart()); |
| 1679 | w->Write<uintptr_t>(desc_->CodeSize()); |
| 1680 | |
| 1681 | WriteFDEStateOnEntry(w); |
| 1682 | WriteFDEStateAfterRBPPush(w); |
| 1683 | WriteFDEStateAfterRBPSet(w); |
| 1684 | WriteFDEStateAfterRBPPop(w); |
| 1685 | |
| 1686 | WriteLength(w, &fde_length_slot, fde_position); |
| 1687 | } |
| 1688 | |
| 1689 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1690 | void UnwindInfoSection::WriteFDEStateOnEntry(Writer* w) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1691 | // The first state, just after the control has been transferred to the the |
| 1692 | // function. |
| 1693 | |
| 1694 | // RBP for this function will be the value of RSP after pushing the RBP |
| 1695 | // for the previous function. The previous RBP has not been pushed yet. |
| 1696 | w->Write<uint8_t>(DW_CFA_DEF_CFA_SF); |
| 1697 | w->WriteULEB128(AMD64_RSP); |
| 1698 | w->WriteSLEB128(-kPointerSize); |
| 1699 | |
| 1700 | // The RA is stored at location CFA + kCallerPCOffset. This is an invariant, |
| 1701 | // and hence omitted from the next states. |
| 1702 | w->Write<uint8_t>(DW_CFA_OFFSET_EXTENDED); |
| 1703 | w->WriteULEB128(AMD64_RA); |
| 1704 | w->WriteSLEB128(StandardFrameConstants::kCallerPCOffset); |
| 1705 | |
| 1706 | // The RBP of the previous function is still in RBP. |
| 1707 | w->Write<uint8_t>(DW_CFA_SAME_VALUE); |
| 1708 | w->WriteULEB128(AMD64_RBP); |
| 1709 | |
| 1710 | // Last location described by this entry. |
| 1711 | w->Write<uint8_t>(DW_CFA_SET_LOC); |
| 1712 | w->Write<uint64_t>( |
| 1713 | desc_->GetStackStateStartAddress(CodeDescription::POST_RBP_PUSH)); |
| 1714 | } |
| 1715 | |
| 1716 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1717 | void UnwindInfoSection::WriteFDEStateAfterRBPPush(Writer* w) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1718 | // The second state, just after RBP has been pushed. |
| 1719 | |
| 1720 | // RBP / CFA for this function is now the current RSP, so just set the |
| 1721 | // offset from the previous rule (from -8) to 0. |
| 1722 | w->Write<uint8_t>(DW_CFA_DEF_CFA_OFFSET); |
| 1723 | w->WriteULEB128(0); |
| 1724 | |
| 1725 | // The previous RBP is stored at CFA + kCallerFPOffset. This is an invariant |
| 1726 | // in this and the next state, and hence omitted in the next state. |
| 1727 | w->Write<uint8_t>(DW_CFA_OFFSET_EXTENDED); |
| 1728 | w->WriteULEB128(AMD64_RBP); |
| 1729 | w->WriteSLEB128(StandardFrameConstants::kCallerFPOffset); |
| 1730 | |
| 1731 | // Last location described by this entry. |
| 1732 | w->Write<uint8_t>(DW_CFA_SET_LOC); |
| 1733 | w->Write<uint64_t>( |
| 1734 | desc_->GetStackStateStartAddress(CodeDescription::POST_RBP_SET)); |
| 1735 | } |
| 1736 | |
| 1737 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1738 | void UnwindInfoSection::WriteFDEStateAfterRBPSet(Writer* w) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1739 | // The third state, after the RBP has been set. |
| 1740 | |
| 1741 | // The CFA can now directly be set to RBP. |
| 1742 | w->Write<uint8_t>(DW_CFA_DEF_CFA); |
| 1743 | w->WriteULEB128(AMD64_RBP); |
| 1744 | w->WriteULEB128(0); |
| 1745 | |
| 1746 | // Last location described by this entry. |
| 1747 | w->Write<uint8_t>(DW_CFA_SET_LOC); |
| 1748 | w->Write<uint64_t>( |
| 1749 | desc_->GetStackStateStartAddress(CodeDescription::POST_RBP_POP)); |
| 1750 | } |
| 1751 | |
| 1752 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1753 | void UnwindInfoSection::WriteFDEStateAfterRBPPop(Writer* w) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1754 | // The fourth (final) state. The RBP has been popped (just before issuing a |
| 1755 | // return). |
| 1756 | |
| 1757 | // The CFA can is now calculated in the same way as in the first state. |
| 1758 | w->Write<uint8_t>(DW_CFA_DEF_CFA_SF); |
| 1759 | w->WriteULEB128(AMD64_RSP); |
| 1760 | w->WriteSLEB128(-kPointerSize); |
| 1761 | |
| 1762 | // The RBP |
| 1763 | w->Write<uint8_t>(DW_CFA_OFFSET_EXTENDED); |
| 1764 | w->WriteULEB128(AMD64_RBP); |
| 1765 | w->WriteSLEB128(StandardFrameConstants::kCallerFPOffset); |
| 1766 | |
| 1767 | // Last location described by this entry. |
| 1768 | w->Write<uint8_t>(DW_CFA_SET_LOC); |
| 1769 | w->Write<uint64_t>(desc_->CodeEnd()); |
| 1770 | } |
| 1771 | |
| 1772 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1773 | bool UnwindInfoSection::WriteBody(Writer* w) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1774 | uint32_t cie_position = WriteCIE(w); |
| 1775 | WriteFDE(w, cie_position); |
| 1776 | return true; |
| 1777 | } |
| 1778 | |
| 1779 | |
| 1780 | #endif // V8_TARGET_ARCH_X64 |
| 1781 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1782 | static void CreateDWARFSections(CodeDescription* desc, DebugObject* obj) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1783 | if (desc->IsLineInfoAvailable()) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1784 | obj->AddSection(new DebugInfoSection(desc)); |
| 1785 | obj->AddSection(new DebugAbbrevSection(desc)); |
| 1786 | obj->AddSection(new DebugLineSection(desc)); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1787 | } |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1788 | #ifdef V8_TARGET_ARCH_X64 |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1789 | obj->AddSection(new UnwindInfoSection(desc)); |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1790 | #endif |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1791 | } |
| 1792 | |
| 1793 | |
| 1794 | // ------------------------------------------------------------------- |
| 1795 | // Binary GDB JIT Interface as described in |
| 1796 | // http://sourceware.org/gdb/onlinedocs/gdb/Declarations.html |
| 1797 | extern "C" { |
| 1798 | typedef enum { |
| 1799 | JIT_NOACTION = 0, |
| 1800 | JIT_REGISTER_FN, |
| 1801 | JIT_UNREGISTER_FN |
| 1802 | } JITAction; |
| 1803 | |
| 1804 | struct JITCodeEntry { |
| 1805 | JITCodeEntry* next_; |
| 1806 | JITCodeEntry* prev_; |
| 1807 | Address symfile_addr_; |
| 1808 | uint64_t symfile_size_; |
| 1809 | }; |
| 1810 | |
| 1811 | struct JITDescriptor { |
| 1812 | uint32_t version_; |
| 1813 | uint32_t action_flag_; |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1814 | JITCodeEntry* relevant_entry_; |
| 1815 | JITCodeEntry* first_entry_; |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1816 | }; |
| 1817 | |
| 1818 | // GDB will place breakpoint into this function. |
| 1819 | // To prevent GCC from inlining or removing it we place noinline attribute |
| 1820 | // and inline assembler statement inside. |
| 1821 | void __attribute__((noinline)) __jit_debug_register_code() { |
| 1822 | __asm__(""); |
| 1823 | } |
| 1824 | |
| 1825 | // GDB will inspect contents of this descriptor. |
| 1826 | // Static initialization is necessary to prevent GDB from seeing |
| 1827 | // uninitialized descriptor. |
| 1828 | JITDescriptor __jit_debug_descriptor = { 1, 0, 0, 0 }; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1829 | |
| 1830 | #ifdef OBJECT_PRINT |
| 1831 | void __gdb_print_v8_object(MaybeObject* object) { |
| 1832 | object->Print(); |
| 1833 | fprintf(stdout, "\n"); |
| 1834 | } |
| 1835 | #endif |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1836 | } |
| 1837 | |
| 1838 | |
| 1839 | static JITCodeEntry* CreateCodeEntry(Address symfile_addr, |
| 1840 | uintptr_t symfile_size) { |
| 1841 | JITCodeEntry* entry = static_cast<JITCodeEntry*>( |
| 1842 | malloc(sizeof(JITCodeEntry) + symfile_size)); |
| 1843 | |
| 1844 | entry->symfile_addr_ = reinterpret_cast<Address>(entry + 1); |
| 1845 | entry->symfile_size_ = symfile_size; |
| 1846 | memcpy(entry->symfile_addr_, symfile_addr, symfile_size); |
| 1847 | |
| 1848 | entry->prev_ = entry->next_ = NULL; |
| 1849 | |
| 1850 | return entry; |
| 1851 | } |
| 1852 | |
| 1853 | |
| 1854 | static void DestroyCodeEntry(JITCodeEntry* entry) { |
| 1855 | free(entry); |
| 1856 | } |
| 1857 | |
| 1858 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1859 | static void RegisterCodeEntry(JITCodeEntry* entry, |
| 1860 | bool dump_if_enabled, |
| 1861 | const char* name_hint) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1862 | #if defined(DEBUG) && !defined(WIN32) |
| 1863 | static int file_num = 0; |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1864 | if (FLAG_gdbjit_dump && dump_if_enabled) { |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1865 | static const int kMaxFileNameSize = 64; |
| 1866 | static const char* kElfFilePrefix = "/tmp/elfdump"; |
| 1867 | static const char* kObjFileExt = ".o"; |
| 1868 | char file_name[64]; |
| 1869 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1870 | OS::SNPrintF(Vector<char>(file_name, kMaxFileNameSize), |
| 1871 | "%s%s%d%s", |
| 1872 | kElfFilePrefix, |
| 1873 | (name_hint != NULL) ? name_hint : "", |
| 1874 | file_num++, |
| 1875 | kObjFileExt); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1876 | WriteBytes(file_name, entry->symfile_addr_, entry->symfile_size_); |
| 1877 | } |
| 1878 | #endif |
| 1879 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1880 | entry->next_ = __jit_debug_descriptor.first_entry_; |
| 1881 | if (entry->next_ != NULL) entry->next_->prev_ = entry; |
| 1882 | __jit_debug_descriptor.first_entry_ = |
| 1883 | __jit_debug_descriptor.relevant_entry_ = entry; |
| 1884 | |
| 1885 | __jit_debug_descriptor.action_flag_ = JIT_REGISTER_FN; |
| 1886 | __jit_debug_register_code(); |
| 1887 | } |
| 1888 | |
| 1889 | |
| 1890 | static void UnregisterCodeEntry(JITCodeEntry* entry) { |
| 1891 | if (entry->prev_ != NULL) { |
| 1892 | entry->prev_->next_ = entry->next_; |
| 1893 | } else { |
| 1894 | __jit_debug_descriptor.first_entry_ = entry->next_; |
| 1895 | } |
| 1896 | |
| 1897 | if (entry->next_ != NULL) { |
| 1898 | entry->next_->prev_ = entry->prev_; |
| 1899 | } |
| 1900 | |
| 1901 | __jit_debug_descriptor.relevant_entry_ = entry; |
| 1902 | __jit_debug_descriptor.action_flag_ = JIT_UNREGISTER_FN; |
| 1903 | __jit_debug_register_code(); |
| 1904 | } |
| 1905 | |
| 1906 | |
| 1907 | static JITCodeEntry* CreateELFObject(CodeDescription* desc) { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1908 | ZoneScope zone_scope(Isolate::Current(), DELETE_ON_EXIT); |
| 1909 | #ifdef __MACH_O |
| 1910 | MachO mach_o; |
| 1911 | Writer w(&mach_o); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1912 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1913 | mach_o.AddSection(new MachOTextSection(kCodeAlignment, |
| 1914 | desc->CodeStart(), |
| 1915 | desc->CodeSize())); |
| 1916 | |
| 1917 | CreateDWARFSections(desc, &mach_o); |
| 1918 | |
| 1919 | mach_o.Write(&w, desc->CodeStart(), desc->CodeSize()); |
| 1920 | #else |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1921 | ELF elf; |
| 1922 | Writer w(&elf); |
| 1923 | |
| 1924 | int text_section_index = elf.AddSection( |
| 1925 | new FullHeaderELFSection(".text", |
| 1926 | ELFSection::TYPE_NOBITS, |
| 1927 | kCodeAlignment, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1928 | desc->CodeStart(), |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1929 | 0, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 1930 | desc->CodeSize(), |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1931 | ELFSection::FLAG_ALLOC | ELFSection::FLAG_EXEC)); |
| 1932 | |
| 1933 | CreateSymbolsTable(desc, &elf, text_section_index); |
| 1934 | |
| 1935 | CreateDWARFSections(desc, &elf); |
| 1936 | |
| 1937 | elf.Write(&w); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1938 | #endif |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1939 | |
| 1940 | return CreateCodeEntry(w.buffer(), w.position()); |
| 1941 | } |
| 1942 | |
| 1943 | |
| 1944 | static bool SameCodeObjects(void* key1, void* key2) { |
| 1945 | return key1 == key2; |
| 1946 | } |
| 1947 | |
| 1948 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 1949 | static HashMap* GetEntries() { |
| 1950 | static HashMap* entries = NULL; |
| 1951 | if (entries == NULL) { |
| 1952 | entries = new HashMap(&SameCodeObjects); |
| 1953 | } |
| 1954 | return entries; |
| 1955 | } |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1956 | |
| 1957 | |
| 1958 | static uint32_t HashForCodeObject(Code* code) { |
| 1959 | static const uintptr_t kGoldenRatio = 2654435761u; |
| 1960 | uintptr_t hash = reinterpret_cast<uintptr_t>(code->address()); |
| 1961 | return static_cast<uint32_t>((hash >> kCodeAlignmentBits) * kGoldenRatio); |
| 1962 | } |
| 1963 | |
| 1964 | |
| 1965 | static const intptr_t kLineInfoTag = 0x1; |
| 1966 | |
| 1967 | |
| 1968 | static bool IsLineInfoTagged(void* ptr) { |
| 1969 | return 0 != (reinterpret_cast<intptr_t>(ptr) & kLineInfoTag); |
| 1970 | } |
| 1971 | |
| 1972 | |
| 1973 | static void* TagLineInfo(GDBJITLineInfo* ptr) { |
| 1974 | return reinterpret_cast<void*>( |
| 1975 | reinterpret_cast<intptr_t>(ptr) | kLineInfoTag); |
| 1976 | } |
| 1977 | |
| 1978 | |
| 1979 | static GDBJITLineInfo* UntagLineInfo(void* ptr) { |
| 1980 | return reinterpret_cast<GDBJITLineInfo*>( |
| 1981 | reinterpret_cast<intptr_t>(ptr) & ~kLineInfoTag); |
| 1982 | } |
| 1983 | |
| 1984 | |
| 1985 | void GDBJITInterface::AddCode(Handle<String> name, |
| 1986 | Handle<Script> script, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1987 | Handle<Code> code, |
| 1988 | CompilationInfo* info) { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1989 | if (!FLAG_gdbjit) return; |
| 1990 | |
| 1991 | // Force initialization of line_ends array. |
| 1992 | GetScriptLineNumber(script, 0); |
| 1993 | |
| 1994 | if (!name.is_null()) { |
Ben Murdoch | 589d697 | 2011-11-30 16:04:58 +0000 | [diff] [blame] | 1995 | SmartArrayPointer<char> name_cstring = name->ToCString(DISALLOW_NULLS); |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1996 | AddCode(*name_cstring, *code, GDBJITInterface::FUNCTION, *script, info); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1997 | } else { |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 1998 | AddCode("", *code, GDBJITInterface::FUNCTION, *script, info); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 1999 | } |
| 2000 | } |
| 2001 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2002 | static void AddUnwindInfo(CodeDescription* desc) { |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2003 | #ifdef V8_TARGET_ARCH_X64 |
| 2004 | if (desc->tag() == GDBJITInterface::FUNCTION) { |
| 2005 | // To avoid propagating unwinding information through |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2006 | // compilation pipeline we use an approximation. |
| 2007 | // For most use cases this should not affect usability. |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2008 | static const int kFramePointerPushOffset = 1; |
| 2009 | static const int kFramePointerSetOffset = 4; |
| 2010 | static const int kFramePointerPopOffset = -3; |
| 2011 | |
| 2012 | uintptr_t frame_pointer_push_address = |
| 2013 | desc->CodeStart() + kFramePointerPushOffset; |
| 2014 | |
| 2015 | uintptr_t frame_pointer_set_address = |
| 2016 | desc->CodeStart() + kFramePointerSetOffset; |
| 2017 | |
| 2018 | uintptr_t frame_pointer_pop_address = |
| 2019 | desc->CodeEnd() + kFramePointerPopOffset; |
| 2020 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2021 | desc->SetStackStateStartAddress(CodeDescription::POST_RBP_PUSH, |
| 2022 | frame_pointer_push_address); |
| 2023 | desc->SetStackStateStartAddress(CodeDescription::POST_RBP_SET, |
| 2024 | frame_pointer_set_address); |
| 2025 | desc->SetStackStateStartAddress(CodeDescription::POST_RBP_POP, |
| 2026 | frame_pointer_pop_address); |
| 2027 | } else { |
| 2028 | desc->SetStackStateStartAddress(CodeDescription::POST_RBP_PUSH, |
| 2029 | desc->CodeStart()); |
| 2030 | desc->SetStackStateStartAddress(CodeDescription::POST_RBP_SET, |
| 2031 | desc->CodeStart()); |
| 2032 | desc->SetStackStateStartAddress(CodeDescription::POST_RBP_POP, |
| 2033 | desc->CodeEnd()); |
| 2034 | } |
| 2035 | #endif // V8_TARGET_ARCH_X64 |
| 2036 | } |
| 2037 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2038 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2039 | static LazyMutex mutex = LAZY_MUTEX_INITIALIZER; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2040 | |
| 2041 | |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2042 | void GDBJITInterface::AddCode(const char* name, |
| 2043 | Code* code, |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2044 | GDBJITInterface::CodeTag tag, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2045 | Script* script, |
| 2046 | CompilationInfo* info) { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2047 | if (!FLAG_gdbjit) return; |
Ben Murdoch | 8b112d2 | 2011-06-08 16:22:53 +0100 | [diff] [blame] | 2048 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2049 | ScopedLock lock(mutex.Pointer()); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2050 | AssertNoAllocation no_gc; |
| 2051 | |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2052 | HashMap::Entry* e = GetEntries()->Lookup(code, HashForCodeObject(code), true); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2053 | if (e->value != NULL && !IsLineInfoTagged(e->value)) return; |
| 2054 | |
| 2055 | GDBJITLineInfo* lineinfo = UntagLineInfo(e->value); |
| 2056 | CodeDescription code_desc(name, |
| 2057 | code, |
| 2058 | script != NULL ? Handle<Script>(script) |
| 2059 | : Handle<Script>(), |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2060 | lineinfo, |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2061 | tag, |
| 2062 | info); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2063 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2064 | if (!FLAG_gdbjit_full && !code_desc.IsLineInfoAvailable()) { |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2065 | delete lineinfo; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2066 | GetEntries()->Remove(code, HashForCodeObject(code)); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2067 | return; |
| 2068 | } |
| 2069 | |
Steve Block | 1e0659c | 2011-05-24 12:43:12 +0100 | [diff] [blame] | 2070 | AddUnwindInfo(&code_desc); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2071 | JITCodeEntry* entry = CreateELFObject(&code_desc); |
| 2072 | ASSERT(!IsLineInfoTagged(entry)); |
| 2073 | |
| 2074 | delete lineinfo; |
| 2075 | e->value = entry; |
| 2076 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2077 | const char* name_hint = NULL; |
| 2078 | bool should_dump = false; |
| 2079 | if (FLAG_gdbjit_dump) { |
| 2080 | if (strlen(FLAG_gdbjit_dump_filter) == 0) { |
| 2081 | name_hint = name; |
| 2082 | should_dump = true; |
| 2083 | } else if (name != NULL) { |
| 2084 | name_hint = strstr(name, FLAG_gdbjit_dump_filter); |
| 2085 | should_dump = (name_hint != NULL); |
| 2086 | } |
| 2087 | } |
| 2088 | RegisterCodeEntry(entry, should_dump, name_hint); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2089 | } |
| 2090 | |
| 2091 | |
| 2092 | void GDBJITInterface::AddCode(GDBJITInterface::CodeTag tag, |
| 2093 | const char* name, |
| 2094 | Code* code) { |
| 2095 | if (!FLAG_gdbjit) return; |
| 2096 | |
| 2097 | EmbeddedVector<char, 256> buffer; |
| 2098 | StringBuilder builder(buffer.start(), buffer.length()); |
| 2099 | |
| 2100 | builder.AddString(Tag2String(tag)); |
| 2101 | if ((name != NULL) && (*name != '\0')) { |
| 2102 | builder.AddString(": "); |
| 2103 | builder.AddString(name); |
| 2104 | } else { |
| 2105 | builder.AddFormatted(": code object %p", static_cast<void*>(code)); |
| 2106 | } |
| 2107 | |
Ben Murdoch | 3fb3ca8 | 2011-12-02 17:19:32 +0000 | [diff] [blame] | 2108 | AddCode(builder.Finalize(), code, tag, NULL, NULL); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2109 | } |
| 2110 | |
| 2111 | |
| 2112 | void GDBJITInterface::AddCode(GDBJITInterface::CodeTag tag, |
| 2113 | String* name, |
| 2114 | Code* code) { |
| 2115 | if (!FLAG_gdbjit) return; |
| 2116 | AddCode(tag, name != NULL ? *name->ToCString(DISALLOW_NULLS) : NULL, code); |
| 2117 | } |
| 2118 | |
| 2119 | |
| 2120 | void GDBJITInterface::AddCode(GDBJITInterface::CodeTag tag, Code* code) { |
| 2121 | if (!FLAG_gdbjit) return; |
| 2122 | |
| 2123 | AddCode(tag, "", code); |
| 2124 | } |
| 2125 | |
| 2126 | |
| 2127 | void GDBJITInterface::RemoveCode(Code* code) { |
| 2128 | if (!FLAG_gdbjit) return; |
| 2129 | |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2130 | ScopedLock lock(mutex.Pointer()); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2131 | HashMap::Entry* e = GetEntries()->Lookup(code, |
| 2132 | HashForCodeObject(code), |
| 2133 | false); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2134 | if (e == NULL) return; |
| 2135 | |
| 2136 | if (IsLineInfoTagged(e->value)) { |
| 2137 | delete UntagLineInfo(e->value); |
| 2138 | } else { |
| 2139 | JITCodeEntry* entry = static_cast<JITCodeEntry*>(e->value); |
| 2140 | UnregisterCodeEntry(entry); |
| 2141 | DestroyCodeEntry(entry); |
| 2142 | } |
| 2143 | e->value = NULL; |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2144 | GetEntries()->Remove(code, HashForCodeObject(code)); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2145 | } |
| 2146 | |
| 2147 | |
| 2148 | void GDBJITInterface::RegisterDetailedLineInfo(Code* code, |
| 2149 | GDBJITLineInfo* line_info) { |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 2150 | ScopedLock lock(mutex.Pointer()); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2151 | ASSERT(!IsLineInfoTagged(line_info)); |
Ben Murdoch | e0cee9b | 2011-05-25 10:26:03 +0100 | [diff] [blame] | 2152 | HashMap::Entry* e = GetEntries()->Lookup(code, HashForCodeObject(code), true); |
Ben Murdoch | b8e0da2 | 2011-05-16 14:20:40 +0100 | [diff] [blame] | 2153 | ASSERT(e->value == NULL); |
| 2154 | e->value = TagLineInfo(line_info); |
| 2155 | } |
| 2156 | |
| 2157 | |
| 2158 | } } // namespace v8::internal |
| 2159 | #endif |