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

vm/object.h

 // 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 2189 matching lines @@
   static intptr_t InstanceSize() {
     ASSERT(sizeof(RawCode) == OFFSET_OF(RawCode, data_));
     return 0;
   }
   static intptr_t InstanceSize(intptr_t pointer_offsets_length) {
     return RoundedAllocationSize(
         sizeof(RawCode) + (pointer_offsets_length * kEntrySize));
   }
   static RawCode* FinalizeCode(const Function& function, Assembler* assembler);
   static RawCode* FinalizeStubCode(const char* name, Assembler* assembler);
+  static RawCode* LookupCode(uword pc);
 
   int32_t GetPointerOffsetAt(int index) const {
     return *PointerOffsetAddrAt(index);
   }
   intptr_t GetTokenIndexOfPC(uword pc) const;
 
   // Find pc of patch code buffer. Return 0 if not found.
   uword GetPatchCodePc() const;
 
   uword GetDeoptPcAtNodeId(intptr_t node_id) const;
   uword GetTypeTestAtNodeId(intptr_t node_id) const;
 
   // Returns true if there is an object in the code between 'start_offset'
   // (inclusive) and 'end_offset' (exclusive).
   bool ObjectExistInArea(intptr_t start_offest, intptr_t end_offset) const;
 
   // Each (*node_ids)[n] has a an extracted ic data array (*arrays)[n].
   // Returns the maximum id found.
   intptr_t ExtractIcDataArraysAtCalls(
       GrowableArray<intptr_t>* node_ids,
       const GrowableObjectArray& ic_data_objs) const;
 
  private:
+  // An object finder visitor interface.
+  class FindRawCodeVisitor : public FindObjectVisitor {
+   public:
+    explicit FindRawCodeVisitor(uword pc) : pc_(pc) { }
+    virtual ~FindRawCodeVisitor() { }
+
+    // Check if object matches find condition.
+    virtual bool FindObject(RawObject* obj);
+
+   private:
+    const uword pc_;
+
+    DISALLOW_COPY_AND_ASSIGN(FindRawCodeVisitor);
+  };
+
   static const intptr_t kEntrySize = sizeof(int32_t);  // NOLINT
 
   void set_instructions(RawInstructions* instructions) {
     raw_ptr()->instructions_ = instructions;
   }
   void set_pointer_offsets_length(intptr_t value) {
     ASSERT(value >= 0);
     raw_ptr()->pointer_offsets_length_ = value;
   }
   int32_t* PointerOffsetAddrAt(int index) const {
@@ skipping 2650 matching lines @@
 }
 
 
 intptr_t Stackmap::SizeInBits() const {
   return (Smi::Value(raw_ptr()->bitmap_size_in_bytes_) * kBitsPerByte);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_