Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 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 | #include "v8.h" |
| 29 | |
| 30 | #include "code-stubs.h" |
| 31 | #include "codegen-inl.h" |
| 32 | #include "debug.h" |
| 33 | #include "disasm.h" |
| 34 | #include "disassembler.h" |
| 35 | #include "macro-assembler.h" |
| 36 | #include "serialize.h" |
| 37 | #include "string-stream.h" |
| 38 | |
| 39 | namespace v8 { |
| 40 | namespace internal { |
| 41 | |
| 42 | #ifdef ENABLE_DISASSEMBLER |
| 43 | |
| 44 | void Disassembler::Dump(FILE* f, byte* begin, byte* end) { |
| 45 | for (byte* pc = begin; pc < end; pc++) { |
| 46 | if (f == NULL) { |
| 47 | PrintF("%" V8PRIxPTR " %4" V8PRIdPTR " %02x\n", pc, pc - begin, *pc); |
| 48 | } else { |
| 49 | fprintf(f, "%" V8PRIxPTR " %4" V8PRIdPTR " %02x\n", |
| 50 | reinterpret_cast<uintptr_t>(pc), pc - begin, *pc); |
| 51 | } |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | |
| 56 | class V8NameConverter: public disasm::NameConverter { |
| 57 | public: |
| 58 | explicit V8NameConverter(Code* code) : code_(code) {} |
| 59 | virtual const char* NameOfAddress(byte* pc) const; |
| 60 | virtual const char* NameInCode(byte* addr) const; |
| 61 | Code* code() const { return code_; } |
| 62 | private: |
| 63 | Code* code_; |
| 64 | }; |
| 65 | |
| 66 | |
| 67 | const char* V8NameConverter::NameOfAddress(byte* pc) const { |
| 68 | static v8::internal::EmbeddedVector<char, 128> buffer; |
| 69 | |
| 70 | const char* name = Builtins::Lookup(pc); |
| 71 | if (name != NULL) { |
| 72 | OS::SNPrintF(buffer, "%s (%p)", name, pc); |
| 73 | return buffer.start(); |
| 74 | } |
| 75 | |
| 76 | if (code_ != NULL) { |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 77 | int offs = static_cast<int>(pc - code_->instruction_start()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 78 | // print as code offset, if it seems reasonable |
| 79 | if (0 <= offs && offs < code_->instruction_size()) { |
| 80 | OS::SNPrintF(buffer, "%d (%p)", offs, pc); |
| 81 | return buffer.start(); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | return disasm::NameConverter::NameOfAddress(pc); |
| 86 | } |
| 87 | |
| 88 | |
| 89 | const char* V8NameConverter::NameInCode(byte* addr) const { |
| 90 | // The V8NameConverter is used for well known code, so we can "safely" |
| 91 | // dereference pointers in generated code. |
| 92 | return (code_ != NULL) ? reinterpret_cast<const char*>(addr) : ""; |
| 93 | } |
| 94 | |
| 95 | |
| 96 | static void DumpBuffer(FILE* f, char* buff) { |
| 97 | if (f == NULL) { |
| 98 | PrintF("%s", buff); |
| 99 | } else { |
| 100 | fprintf(f, "%s", buff); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | static const int kOutBufferSize = 2048 + String::kMaxShortPrintLength; |
| 105 | static const int kRelocInfoPosition = 57; |
| 106 | |
| 107 | static int DecodeIt(FILE* f, |
| 108 | const V8NameConverter& converter, |
| 109 | byte* begin, |
| 110 | byte* end) { |
| 111 | NoHandleAllocation ha; |
| 112 | AssertNoAllocation no_alloc; |
| 113 | ExternalReferenceEncoder ref_encoder; |
| 114 | |
| 115 | v8::internal::EmbeddedVector<char, 128> decode_buffer; |
| 116 | v8::internal::EmbeddedVector<char, kOutBufferSize> out_buffer; |
| 117 | byte* pc = begin; |
| 118 | disasm::Disassembler d(converter); |
| 119 | RelocIterator* it = NULL; |
| 120 | if (converter.code() != NULL) { |
| 121 | it = new RelocIterator(converter.code()); |
| 122 | } else { |
| 123 | // No relocation information when printing code stubs. |
| 124 | } |
| 125 | int constants = -1; // no constants being decoded at the start |
| 126 | |
| 127 | while (pc < end) { |
| 128 | // First decode instruction so that we know its length. |
| 129 | byte* prev_pc = pc; |
| 130 | if (constants > 0) { |
| 131 | OS::SNPrintF(decode_buffer, |
| 132 | "%08x constant", |
| 133 | *reinterpret_cast<int32_t*>(pc)); |
| 134 | constants--; |
| 135 | pc += 4; |
| 136 | } else { |
| 137 | int num_const = d.ConstantPoolSizeAt(pc); |
| 138 | if (num_const >= 0) { |
| 139 | OS::SNPrintF(decode_buffer, |
| 140 | "%08x constant pool begin", |
| 141 | *reinterpret_cast<int32_t*>(pc)); |
| 142 | constants = num_const; |
| 143 | pc += 4; |
| 144 | } else if (it != NULL && !it->done() && it->rinfo()->pc() == pc && |
| 145 | it->rinfo()->rmode() == RelocInfo::INTERNAL_REFERENCE) { |
| 146 | // raw pointer embedded in code stream, e.g., jump table |
| 147 | byte* ptr = *reinterpret_cast<byte**>(pc); |
| 148 | OS::SNPrintF(decode_buffer, |
| 149 | "%08" V8PRIxPTR " jump table entry %4" V8PRIdPTR, |
| 150 | ptr, |
| 151 | ptr - begin); |
| 152 | pc += 4; |
| 153 | } else { |
| 154 | decode_buffer[0] = '\0'; |
| 155 | pc += d.InstructionDecode(decode_buffer, pc); |
| 156 | } |
| 157 | } |
| 158 | |
| 159 | // Collect RelocInfo for this instruction (prev_pc .. pc-1) |
| 160 | List<const char*> comments(4); |
| 161 | List<byte*> pcs(1); |
| 162 | List<RelocInfo::Mode> rmodes(1); |
| 163 | List<intptr_t> datas(1); |
| 164 | if (it != NULL) { |
| 165 | while (!it->done() && it->rinfo()->pc() < pc) { |
| 166 | if (RelocInfo::IsComment(it->rinfo()->rmode())) { |
| 167 | // For comments just collect the text. |
| 168 | comments.Add(reinterpret_cast<const char*>(it->rinfo()->data())); |
| 169 | } else { |
| 170 | // For other reloc info collect all data. |
| 171 | pcs.Add(it->rinfo()->pc()); |
| 172 | rmodes.Add(it->rinfo()->rmode()); |
| 173 | datas.Add(it->rinfo()->data()); |
| 174 | } |
| 175 | it->next(); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | StringBuilder out(out_buffer.start(), out_buffer.length()); |
| 180 | |
| 181 | // Comments. |
| 182 | for (int i = 0; i < comments.length(); i++) { |
| 183 | out.AddFormatted(" %s\n", comments[i]); |
| 184 | } |
| 185 | |
| 186 | // Write out comments, resets outp so that we can format the next line. |
| 187 | DumpBuffer(f, out.Finalize()); |
| 188 | out.Reset(); |
| 189 | |
| 190 | // Instruction address and instruction offset. |
| 191 | out.AddFormatted("%p %4d ", prev_pc, prev_pc - begin); |
| 192 | |
| 193 | // Instruction. |
| 194 | out.AddFormatted("%s", decode_buffer.start()); |
| 195 | |
| 196 | // Print all the reloc info for this instruction which are not comments. |
| 197 | for (int i = 0; i < pcs.length(); i++) { |
| 198 | // Put together the reloc info |
| 199 | RelocInfo relocinfo(pcs[i], rmodes[i], datas[i]); |
| 200 | |
| 201 | // Indent the printing of the reloc info. |
| 202 | if (i == 0) { |
| 203 | // The first reloc info is printed after the disassembled instruction. |
| 204 | out.AddPadding(' ', kRelocInfoPosition - out.position()); |
| 205 | } else { |
| 206 | // Additional reloc infos are printed on separate lines. |
| 207 | out.AddFormatted("\n"); |
| 208 | out.AddPadding(' ', kRelocInfoPosition); |
| 209 | } |
| 210 | |
| 211 | RelocInfo::Mode rmode = relocinfo.rmode(); |
| 212 | if (RelocInfo::IsPosition(rmode)) { |
| 213 | if (RelocInfo::IsStatementPosition(rmode)) { |
| 214 | out.AddFormatted(" ;; debug: statement %d", relocinfo.data()); |
| 215 | } else { |
| 216 | out.AddFormatted(" ;; debug: position %d", relocinfo.data()); |
| 217 | } |
| 218 | } else if (rmode == RelocInfo::EMBEDDED_OBJECT) { |
| 219 | HeapStringAllocator allocator; |
| 220 | StringStream accumulator(&allocator); |
| 221 | relocinfo.target_object()->ShortPrint(&accumulator); |
| 222 | SmartPointer<const char> obj_name = accumulator.ToCString(); |
| 223 | out.AddFormatted(" ;; object: %s", *obj_name); |
| 224 | } else if (rmode == RelocInfo::EXTERNAL_REFERENCE) { |
| 225 | const char* reference_name = |
| 226 | ref_encoder.NameOfAddress(*relocinfo.target_reference_address()); |
| 227 | out.AddFormatted(" ;; external reference (%s)", reference_name); |
| 228 | } else if (RelocInfo::IsCodeTarget(rmode)) { |
| 229 | out.AddFormatted(" ;; code:"); |
| 230 | if (rmode == RelocInfo::CONSTRUCT_CALL) { |
| 231 | out.AddFormatted(" constructor,"); |
| 232 | } |
| 233 | Code* code = Code::GetCodeFromTargetAddress(relocinfo.target_address()); |
| 234 | Code::Kind kind = code->kind(); |
| 235 | if (code->is_inline_cache_stub()) { |
| 236 | if (rmode == RelocInfo::CODE_TARGET_CONTEXT) { |
| 237 | out.AddFormatted(" contextual,"); |
| 238 | } |
| 239 | InlineCacheState ic_state = code->ic_state(); |
| 240 | out.AddFormatted(" %s, %s", Code::Kind2String(kind), |
| 241 | Code::ICState2String(ic_state)); |
| 242 | if (ic_state == MONOMORPHIC) { |
| 243 | PropertyType type = code->type(); |
| 244 | out.AddFormatted(", %s", Code::PropertyType2String(type)); |
| 245 | } |
| 246 | if (code->ic_in_loop() == IN_LOOP) { |
| 247 | out.AddFormatted(", in_loop"); |
| 248 | } |
| 249 | if (kind == Code::CALL_IC) { |
| 250 | out.AddFormatted(", argc = %d", code->arguments_count()); |
| 251 | } |
| 252 | } else if (kind == Code::STUB) { |
| 253 | // Reverse lookup required as the minor key cannot be retrieved |
| 254 | // from the code object. |
| 255 | Object* obj = Heap::code_stubs()->SlowReverseLookup(code); |
| 256 | if (obj != Heap::undefined_value()) { |
| 257 | ASSERT(obj->IsSmi()); |
| 258 | // Get the STUB key and extract major and minor key. |
| 259 | uint32_t key = Smi::cast(obj)->value(); |
| 260 | uint32_t minor_key = CodeStub::MinorKeyFromKey(key); |
| 261 | ASSERT(code->major_key() == CodeStub::MajorKeyFromKey(key)); |
| 262 | out.AddFormatted(" %s, %s, ", |
| 263 | Code::Kind2String(kind), |
| 264 | CodeStub::MajorName(code->major_key())); |
| 265 | switch (code->major_key()) { |
| 266 | case CodeStub::CallFunction: |
| 267 | out.AddFormatted("argc = %d", minor_key); |
| 268 | break; |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame^] | 269 | default: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 270 | out.AddFormatted("minor: %d", minor_key); |
| 271 | } |
| 272 | } |
| 273 | } else { |
| 274 | out.AddFormatted(" %s", Code::Kind2String(kind)); |
| 275 | } |
| 276 | } else { |
| 277 | out.AddFormatted(" ;; %s", RelocInfo::RelocModeName(rmode)); |
| 278 | } |
| 279 | } |
| 280 | out.AddString("\n"); |
| 281 | DumpBuffer(f, out.Finalize()); |
| 282 | out.Reset(); |
| 283 | } |
| 284 | |
| 285 | delete it; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 286 | return static_cast<int>(pc - begin); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | |
| 290 | int Disassembler::Decode(FILE* f, byte* begin, byte* end) { |
| 291 | V8NameConverter defaultConverter(NULL); |
| 292 | return DecodeIt(f, defaultConverter, begin, end); |
| 293 | } |
| 294 | |
| 295 | |
| 296 | // Called by Code::CodePrint. |
| 297 | void Disassembler::Decode(FILE* f, Code* code) { |
| 298 | byte* begin = Code::cast(code)->instruction_start(); |
| 299 | byte* end = begin + Code::cast(code)->instruction_size(); |
| 300 | V8NameConverter v8NameConverter(code); |
| 301 | DecodeIt(f, v8NameConverter, begin, end); |
| 302 | } |
| 303 | |
| 304 | #else // ENABLE_DISASSEMBLER |
| 305 | |
| 306 | void Disassembler::Dump(FILE* f, byte* begin, byte* end) {} |
| 307 | int Disassembler::Decode(FILE* f, byte* begin, byte* end) { return 0; } |
| 308 | void Disassembler::Decode(FILE* f, Code* code) {} |
| 309 | |
| 310 | #endif // ENABLE_DISASSEMBLER |
| 311 | |
| 312 | } } // namespace v8::internal |