Add a stress testing flag --background-compilation-stop-alot; add an extra check if background comp…

runtime/vm/code_generator.cc

Index: runtime/vm/code_generator.cc
diff --git a/runtime/vm/code_generator.cc b/runtime/vm/code_generator.cc
index 46bbe5e64ab35cb2c912b0f3c6ba3d8d3d88c140..97b8fc8d4fb261d3bf108ce08a83026ffe89a385 100644
--- a/runtime/vm/code_generator.cc
+++ b/runtime/vm/code_generator.cc
@@ -1405,6 +1405,9 @@ DEFINE_RUNTIME_ENTRY(OptimizeInvokedFunction, 1) {
       if (FLAG_enable_inlining_annotations) {
         FATAL("Cannot enable inlining annotations and background compilation");
       }
+      if (FLAG_background_compilation_stop_alot) {
+        BackgroundCompiler::Stop(isolate);
+      }
       // Reduce the chance of triggering optimization while the function is
       // being optimized in the background. INT_MIN should ensure that it takes
       // long time to trigger optimization.