Very first steps for a debugger

runtime/vm/stub_code.h

 // Copyright (c) 2011, 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_STUB_CODE_H_
 #define VM_STUB_CODE_H_
 
 #include "vm/allocation.h"
 #include "vm/assembler.h"
 
@@ skipping 27 matching lines @@
 // However, in cases where a simple GC-safe placeholder is needed on the stack,
 // using Smi 0 instead of Object::null() is slightly more efficient, since a Smi
 // does not require relocation.
 
 // List of stubs created per isolate, these stubs could potentially contain
 // embedded objects and hence cannot be shared across isolates.
 #define STUB_CODE_LIST(V)                                                      \
   V(InvokeDartCode)                                                            \
   V(AllocateContext)                                                           \
   V(InlineCache)                                                               \
+  V(BreakpointStatic)                                                          \

[siva, 2011/11/30 00:00:47]

Does breakpoint static stub need to be generated on a per isolate basis? Can it
not be in the VM Isolate?

[hausner, 2011/11/30 01:17:05]

Done.

+  V(BreakpointDynamic)                                                         \
 
 
 // class StubEntry is used to describe stub methods generated in dart to
 // abstract out common code executed from generated dart code.
 class StubEntry {
  public:
   StubEntry(const char* name, const Code& code);
   ~StubEntry() {}
 
   const ExternalLabel& label() const { return label_; }
@@ skipping 60 matching lines @@
     return name##_entry()->Size();                                             \
   }
   VM_STUB_CODE_LIST(STUB_CODE_ACCESSOR);
 #undef STUB_CODE_ACCESSOR
 
   // Define the per-isolate stub code accessors.
 #define STUB_CODE_ACCESSOR(name)                                               \
   static StubEntry* name##_entry() {                                           \
     return Isolate::Current()->stub_code()->name##_entry_;                     \
   }                                                                            \
+  static const ExternalLabel& name##Label() {                                  \
+    return name##_entry()->label();                                            \
+  }                                                                            \
   static uword name##EntryPoint() {                                            \
     return name##_entry()->EntryPoint();                                       \
   }                                                                            \
   static intptr_t name##Size() {                                               \
     return name##_entry()->Size();                                             \
   }
   STUB_CODE_LIST(STUB_CODE_ACCESSOR);
 #undef STUB_CODE_ACCESSOR
 
   static RawCode* GetAllocationStubForClass(const Class& cls);
@@ skipping 27 matching lines @@
 
   static void GenerateAllocationStubForClass(Assembler* assembler,
                                              const Class& cls);
   static void GenerateAllocationStubForClosure(Assembler* assembler,
                                                const Function& func);
 };
 
 }  // namespace dart
 
 #endif  // VM_STUB_CODE_H_