src/hotspot/share/prims/whitebox.cpp

rev 56101 : 8227745: Enable Escape Analysis for better performance when debugging
Reviewed-by: ???

@@ -70,10 +70,11 @@
 #include "runtime/jniHandles.inline.hpp"
 #include "runtime/os.hpp"
 #include "runtime/sweeper.hpp"
 #include "runtime/thread.hpp"
 #include "runtime/threadSMR.hpp"
+#include "runtime/vframe.hpp"
 #include "runtime/vm_version.hpp"
 #include "services/memoryService.hpp"
 #include "utilities/align.hpp"
 #include "utilities/debug.hpp"
 #include "utilities/elfFile.hpp"

@@ -817,10 +818,24 @@
   VM_WhiteBoxDeoptimizeFrames op(make_not_entrant == JNI_TRUE);
   VMThread::execute(&op);
   return op.result();
 WB_END
 
+WB_ENTRY(jboolean, WB_IsFrameDeoptimized(JNIEnv* env, jobject o, jint depth))
+  JavaThread* t = JavaThread::current();
+  bool result = false;
+  if (t->has_last_Java_frame()) {
+    RegisterMap reg_map(t);
+    javaVFrame *jvf = t->last_java_vframe(&reg_map);
+    for (jint d = 0; d < depth && jvf != NULL; d++ ) {
+      jvf = jvf->java_sender();
+    }
+    result = jvf != NULL && jvf->fr().is_deoptimized_frame();
+  }
+  return result;
+WB_END
+
 WB_ENTRY(void, WB_DeoptimizeAll(JNIEnv* env, jobject o))
   MutexLocker mu(Compile_lock);
   CodeCache::mark_all_nmethods_for_deoptimization();
   VM_Deoptimize op;
   VMThread::execute(&op);

@@ -2212,10 +2227,11 @@
   {CC"NMTReleaseMemory",    CC"(JJ)V",                (void*)&WB_NMTReleaseMemory   },
   {CC"NMTChangeTrackingLevel", CC"()Z",               (void*)&WB_NMTChangeTrackingLevel},
   {CC"NMTGetHashSize",      CC"()I",                  (void*)&WB_NMTGetHashSize     },
 #endif // INCLUDE_NMT
   {CC"deoptimizeFrames",   CC"(Z)I",                  (void*)&WB_DeoptimizeFrames  },
+  {CC"isFrameDeoptimized", CC"(I)Z",                  (void*)&WB_IsFrameDeoptimized},
   {CC"deoptimizeAll",      CC"()V",                   (void*)&WB_DeoptimizeAll     },
   {CC"deoptimizeMethod0",   CC"(Ljava/lang/reflect/Executable;Z)I",
                                                       (void*)&WB_DeoptimizeMethod  },
   {CC"isMethodCompiled0",   CC"(Ljava/lang/reflect/Executable;Z)Z",
                                                       (void*)&WB_IsMethodCompiled  },