DBC: When calling DRT_OptimizeInvokedFunction, patch the stack to have a stub instead of the to-be-…

runtime/vm/stub_code_dbc.cc

Index: runtime/vm/stub_code_dbc.cc
diff --git a/runtime/vm/stub_code_dbc.cc b/runtime/vm/stub_code_dbc.cc
index 1f2d23e26c7bcce2600f9d0352b802ef3273ab2e..81a83d6e1fe4a84383b0eebd313cda858e7a2282 100644
--- a/runtime/vm/stub_code_dbc.cc
+++ b/runtime/vm/stub_code_dbc.cc
@@ -32,6 +32,13 @@ void StubCode::GenerateLazyCompileStub(Assembler* assembler) {
 }
 
 
+// Not executed, but used as a stack marker when calling
+// DRT_OptimizeInvokedFunction.
+void StubCode::GenerateOptimizeFunctionStub(Assembler* assembler) {
+  __ Trap();

[zra, 2016/11/04 16:01:05]

Oh okay, great.

+}
+
+
 // TODO(vegorov) Don't generate this stub.
 void StubCode::GenerateFixCallersTargetStub(Assembler* assembler) {
   __ Trap();