First part of static call cleanup: store static call targets into code object, referenced by code-o…

runtime/vm/object.cc

Index: runtime/vm/object.cc
===================================================================
--- runtime/vm/object.cc	(revision 15037)
+++ runtime/vm/object.cc	(working copy)
@@ -7002,6 +7002,30 @@
 }
 
 
+void Code::set_static_calls_target_table(const Array& value) const {
+  StorePointer(&raw_ptr()->static_calls_target_table_, value.raw());
+}
+
+
+RawFunction* Code::GetStaticCallTargetAt(uword pc) {
+  const Code& code = Code::Handle(Code::LookupCode(pc));
+  if (!code.IsNull()) {
+    RawObject* raw_code_offset =
+        reinterpret_cast<RawObject*>(Smi::New(pc - code.EntryPoint()));
+    const Array& array =
+        Array::Handle(code.raw_ptr()->static_calls_target_table_);
+    for (intptr_t i = 0; i < array.Length(); i += 2) {
+      if (array.At(i) == raw_code_offset) {
+        Function& function = Function::Handle();
+        function ^= array.At(i + 1);
+        return function.raw();
+      }
+    }
+  }
+  return Function::null();
+}
+
+
 void Code::set_resolved_static_calls(const GrowableObjectArray& val) const {
   StorePointer(&raw_ptr()->resolved_static_calls_, val.raw());
 }