Add CallTree builtin.

js/src/jsbuiltins.cpp

@@ -56,6 +56,7 @@
 #include "nanojit/avmplus.h"
 #include "nanojit/nanojit.h"
 
+using namespace avmplus;
 using namespace nanojit;
 
 jsdouble FASTCALL builtin_dmod(jsdouble a, jsdouble b)
@@ -301,6 +302,20 @@ builtin_CloseIterator(JSContext* cx, jsval v)
     return js_CloseIterator(cx, v);
 }
 
+GuardRecord* FASTCALL
+builtin_CallTree(InterpState* outer, Fragment* f)
+{
+    InterpState state;
+    state.ip = f->ip;
+    state.sp = outer->sp;
+    state.rp = outer->rp;
+    state.gp = outer->gp;
+    state.cx = outer->cx;
+    union { NIns *code; GuardRecord* (FASTCALL *func)(InterpState*, Fragment*); } u;
+    u.code = f->code();
+    return u.func(&state, NULL);
+}
+
 #define LO ARGSIZE_LO
 #define F  ARGSIZE_F
 #define Q  ARGSIZE_Q