Allow StackFrameIterator to be used on a different thread than the isolate whose stack frames are b…

runtime/vm/stub_code.cc

Index: runtime/vm/stub_code.cc
diff --git a/runtime/vm/stub_code.cc b/runtime/vm/stub_code.cc
index d7b0030b80bd2d4ca2b34fa58b0720ce8e23591f..aef2062f697210c203075dd66126d2269b21957a 100644
--- a/runtime/vm/stub_code.cc
+++ b/runtime/vm/stub_code.cc
@@ -91,8 +91,14 @@ void StubCode::VisitObjectPointers(ObjectPointerVisitor* visitor) {
 
 
 bool StubCode::InInvocationStub(uword pc) {
-  return ((pc >= InvokeDartCodeEntryPoint()) &&
-          (pc < (InvokeDartCodeEntryPoint() + InvokeDartCodeSize())));
+  return InInvocationStubForIsolate(Isolate::Current(), pc);
+}
+
+
+bool StubCode::InInvocationStubForIsolate(Isolate* isolate, uword pc) {
+  uword entry = isolate->stub_code()->InvokeDartCodeEntryPoint();
+  uword size = isolate->stub_code()->InvokeDartCodeSize();
+  return (pc >= entry) && (pc < (entry + size));
 }