Do not reverse lookup code stubs dictionary.

src/disassembler.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 77 matching lines @@
 static const int kRelocInfoPosition = 57;
 
 static int DecodeIt(Isolate* isolate,
                     FILE* f,
                     const V8NameConverter& converter,
                     byte* begin,
                     byte* end) {
   SealHandleScope shs(isolate);
   DisallowHeapAllocation no_alloc;
   ExternalReferenceEncoder ref_encoder(isolate);
-  Heap* heap = isolate->heap();
 
   v8::internal::EmbeddedVector<char, 128> decode_buffer;
   v8::internal::EmbeddedVector<char, kOutBufferSize> out_buffer;
   StringBuilder out(out_buffer.start(), out_buffer.length());
   byte* pc = begin;
   disasm::Disassembler d(converter);
   RelocIterator* it = NULL;
   if (converter.code() != NULL) {
     it = new RelocIterator(converter.code());
   } else {
@@ skipping 110 matching lines @@
             out.AddFormatted(" contextual,");
           }
           InlineCacheState ic_state = code->ic_state();
           out.AddFormatted(" %s, %s", Code::Kind2String(kind),
               Code::ICState2String(ic_state));
           if (ic_state == MONOMORPHIC) {
             Code::StubType type = code->type();
             out.AddFormatted(", %s", Code::StubType2String(type));
           }
         } else if (kind == Code::STUB || kind == Code::HANDLER) {
-          // Reverse lookup required as the minor key cannot be retrieved
-          // from the code object.
-          Object* obj = heap->code_stubs()->SlowReverseLookup(code);
-          if (obj != heap->undefined_value()) {
-            ASSERT(obj->IsSmi());
-            // Get the STUB key and extract major and minor key.
-            uint32_t key = Smi::cast(obj)->value();
-            uint32_t minor_key = CodeStub::MinorKeyFromKey(key);
-            CodeStub::Major major_key = CodeStub::GetMajorKey(code);
-            ASSERT(major_key == CodeStub::MajorKeyFromKey(key));
-            out.AddFormatted(" %s, %s, ",
-                             Code::Kind2String(kind),
-                             CodeStub::MajorName(major_key, false));
-            switch (major_key) {
-              case CodeStub::CallFunction: {
-                int argc =
-                    CallFunctionStub::ExtractArgcFromMinorKey(minor_key);
-                out.AddFormatted("argc = %d", argc);
-                break;
-              }
-              default:
-                out.AddFormatted("minor: %d", minor_key);
+          // Get the STUB key and extract major and minor key.
+          uint32_t key = code->stub_key();
+          uint32_t minor_key = CodeStub::MinorKeyFromKey(key);
+          CodeStub::Major major_key = CodeStub::GetMajorKey(code);
+          ASSERT(major_key == CodeStub::MajorKeyFromKey(key));
+          out.AddFormatted(" %s, %s, ", Code::Kind2String(kind),
+                           CodeStub::MajorName(major_key, false));
+          switch (major_key) {
+            case CodeStub::CallFunction: {
+              int argc = CallFunctionStub::ExtractArgcFromMinorKey(minor_key);
+              out.AddFormatted("argc = %d", argc);
+              break;
             }
+            default:
+              out.AddFormatted("minor: %d", minor_key);
           }
         } else {
           out.AddFormatted(" %s", Code::Kind2String(kind));
         }
         if (rmode == RelocInfo::CODE_TARGET_WITH_ID) {
           out.AddFormatted(" (id = %d)", static_cast<int>(relocinfo.data()));
         }
       } else if (RelocInfo::IsRuntimeEntry(rmode) &&
                  isolate->deoptimizer_data() != NULL) {
         // A runtime entry reloinfo might be a deoptimization bailout.
@@ skipping 73 matching lines @@
 int Disassembler::Decode(Isolate* isolate, FILE* f, byte* begin, byte* end) {
   return 0;
 }
 
 
 void Disassembler::Decode(FILE* f, Code* code) {}
 
 #endif  // ENABLE_DISASSEMBLER
 
 } }  // namespace v8::internal