Introduce intrinsic to expose debug state to generated code.

src/runtime.h

 // Copyright 2012 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.
 
 #ifndef V8_RUNTIME_H_
 #define V8_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/zone.h"
 
@@ skipping 420 matching lines @@
   F(IsBreakOnException, 1, 1) \
   F(PrepareStep, 4, 1) \
   F(ClearStepping, 0, 1) \
   F(DebugEvaluate, 6, 1) \
   F(DebugEvaluateGlobal, 4, 1) \
   F(DebugGetLoadedScripts, 0, 1) \
   F(DebugReferencedBy, 3, 1) \
   F(DebugConstructedBy, 2, 1) \
   F(DebugGetPrototype, 1, 1) \
   F(DebugSetScriptSource, 2, 1) \
+  F(DebugCallbackSupportsStepping, 1, 1) \
   F(SystemBreak, 0, 1) \
   F(DebugDisassembleFunction, 1, 1) \
   F(DebugDisassembleConstructor, 1, 1) \
   F(FunctionGetInferredName, 1, 1) \
   F(LiveEditFindSharedFunctionInfosForScript, 1, 1) \
   F(LiveEditGatherCompileInfo, 2, 1) \
   F(LiveEditReplaceScript, 3, 1) \
   F(LiveEditReplaceFunctionCode, 2, 1) \
   F(LiveEditFunctionSourceUpdated, 1, 1) \
   F(LiveEditFunctionSetScript, 2, 1) \
@@ skipping 196 matching lines @@
   F(GeneratorThrow, 2, 1)                                                    \
   F(DebugBreakInOptimizedCode, 0, 1)                                         \
   F(ClassOf, 1, 1)                                                           \
   F(StringCharCodeAt, 2, 1)                                                  \
   F(StringAdd, 2, 1)                                                         \
   F(SubString, 3, 1)                                                         \
   F(StringCompare, 2, 1)                                                     \
   F(RegExpExec, 4, 1)                                                        \
   F(RegExpConstructResult, 3, 1)                                             \
   F(GetFromCache, 2, 1)                                                      \
-  F(NumberToString, 1, 1)
+  F(NumberToString, 1, 1)                                                    \
+  F(DebugIsActive, 0, 1)
 
 
 // ----------------------------------------------------------------------------
 // INLINE_OPTIMIZED_FUNCTION_LIST defines all inlined functions accessed
 // with a native call of the form %_name from within JS code that also have
 // a corresponding runtime function, that is called from non-optimized code.
 // For the benefit of (fuzz) tests, the runtime version can also be called
 // directly as %name (i.e. without the leading underscore).
 // Entries have the form F(name, number of arguments, number of return values).
 #define INLINE_OPTIMIZED_FUNCTION_LIST(F) \
   /* Typed Arrays */                                                         \
   F(TypedArrayInitialize, 5, 1)                                              \
   F(DataViewInitialize, 4, 1)                                                \
   F(MaxSmi, 0, 1)                                                            \
   F(TypedArrayMaxSizeInHeap, 0, 1)                                           \
   F(ArrayBufferViewGetByteLength, 1, 1)                                      \
   F(ArrayBufferViewGetByteOffset, 1, 1)                                      \
   F(TypedArrayGetLength, 1, 1)                                               \
   /* ArrayBuffer */                                                          \
   F(ArrayBufferGetByteLength, 1, 1)                                          \
   /* Maths */                                                                \
   F(ConstructDouble, 2, 1)                                                   \
   F(DoubleHi, 1, 1)                                                          \
   F(DoubleLo, 1, 1)                                                          \
   F(MathSqrtRT, 1, 1)                                                        \
-  F(MathLogRT, 1, 1)                                                         \
-  /* Debugger */                                                             \
-  F(DebugCallbackSupportsStepping, 1, 1)
+  F(MathLogRT, 1, 1)
 
 
 //---------------------------------------------------------------------------
 // Runtime provides access to all C++ runtime functions.
 
 class RuntimeState {
  public:
   StaticResource<ConsStringIteratorOp>* string_iterator() {
     return &string_iterator_;
   }
@@ skipping 195 matching lines @@
 class AllocateDoubleAlignFlag:  public BitField<bool,            0, 1> {};
 class AllocateTargetSpace:      public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag:   public BitField<bool,       0, 1> {};
 class DeclareGlobalsNativeFlag: public BitField<bool,       1, 1> {};
 class DeclareGlobalsStrictMode: public BitField<StrictMode, 2, 1> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_