Use a reserved stack local variable to store the Code object so that it can be looked up easily whe…

vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
@@ skipping 6162 matching lines @@
     return FinalizeCode("", assembler, Heap::kDartCode);
   }
 }
 
 
 RawCode* Code::FinalizeStubCode(const char* name, Assembler* assembler) {
   return FinalizeCode(name, assembler, Heap::kStubCode);
 }
 
 
+// Check if object matches find condition.
+bool Code::FindRawCodeVisitor::FindObject(RawObject* obj) {
+  return RawInstructions::ContainsPC(obj, pc_);
+}
+
+
+RawCode* Code::LookupCode(uword pc) {
+  Isolate* isolate = Isolate::Current();
+  NoGCScope no_gc;
+  FindRawCodeVisitor visitor(pc);
+  RawInstructions* instr;
+  instr = isolate->heap()->FindObjectInCodeSpace(&visitor);
+  if (instr != Instructions::null()) {
+    return instr->ptr()->code_;
+  }
+  instr = isolate->heap()->FindObjectInStubCodeSpace(&visitor);
+  if (instr != Instructions::null()) {
+    return instr->ptr()->code_;
+  }
+  return Code::null();
+}
+
+
 intptr_t Code::GetTokenIndexOfPC(uword pc) const {
   intptr_t token_index = -1;
   const PcDescriptors& descriptors = PcDescriptors::Handle(pc_descriptors());
   for (intptr_t i = 0; i < descriptors.Length(); i++) {
     if (descriptors.PC(i) == pc) {
       token_index = descriptors.TokenIndex(i);
       break;
     }
   }
   return token_index;
@@ skipping 3502 matching lines @@
                                  const GrowableArray<uword>& frame_pcs) const {
   Isolate* isolate = Isolate::Current();
   ASSERT(isolate != NULL);
   Function& function = Function::Handle(isolate, Function::null());
   Code& code = Code::Handle(isolate, Code::null());
   Smi& pc_offset = Smi::Handle(isolate, Smi::New(0));
   const Array& function_array = Array::Handle(raw_ptr()->function_array_);
   const Array& code_array = Array::Handle(raw_ptr()->code_array_);
   const Array& pc_offset_array = Array::Handle(raw_ptr()->pc_offset_array_);
   for (intptr_t i = 0; i < frame_pcs.length(); i++) {
-    code = StackFrame::LookupCode(isolate, frame_pcs[i]);
+    code = Code::LookupCode(frame_pcs[i]);
     ASSERT(!code.IsNull());
     function = code.function();
     function_array.SetAt((index + i), function);
     code_array.SetAt((index + i), code);
     pc_offset = Smi::New(frame_pcs[i] - code.EntryPoint());
     pc_offset_array.SetAt((index + i), pc_offset);
   }
 }
 
 
@@ skipping 204 matching lines @@
   const String& str = String::Handle(pattern());
   const char* format = "JSRegExp: pattern=%s flags=%s";
   intptr_t len = OS::SNPrint(NULL, 0, format, str.ToCString(), Flags());
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   OS::SNPrint(chars, (len + 1), format, str.ToCString(), Flags());
   return chars;
 }
 
 }  // namespace dart