--- /dev/null	2018-01-25 15:56:56.000000000 -0800
+++ new/test/hotspot/jtreg/serviceability/jvmti/8161605/libCanGenerateAllClassHook.c	2018-01-25 15:56:55.413221200 -0800
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "jvmti.h"
+#include "jni.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef JNI_ENV_ARG
+
+#ifdef __cplusplus
+#define JNI_ENV_ARG(x, y) y
+#define JNI_ENV_PTR(x) x
+#else
+#define JNI_ENV_ARG(x,y) x, y
+#define JNI_ENV_PTR(x) (*x)
+#endif
+
+#endif
+
+
+static jvmtiEnv *jvmti = NULL;
+
+typedef enum {
+    Yes = 1,
+    No = 0,
+    Error = -1
+} IsAvail;
+
+static IsAvail onLoadIsAvail = Error;
+
+void reportError(const char *msg, int err) {
+    printf("%s, error: %d\n", msg, err);
+}
+
+static IsAvail isClassHookAvail() {
+    IsAvail result = Error;
+    if (jvmti == NULL) {
+        reportError("jvmti is NULL", -1);
+    } else {
+        jvmtiCapabilities caps;
+        jvmtiPhase phase;
+        jvmtiError err = (*jvmti)->GetPotentialCapabilities(jvmti, &caps);
+        if (err != JVMTI_ERROR_NONE) {
+            reportError("GetPotentialCapabilities failed", err);
+        } else {
+            result = caps.can_generate_all_class_hook_events ? Yes : No;
+        }
+
+        err = (*jvmti)->GetPhase(jvmti, &phase);
+        if (err != JVMTI_ERROR_NONE) {
+            reportError("GetPhase failed", err);
+        }
+
+        printf("isClassHookAvail: phase=%d, value=%d\n", phase, result);
+    }
+    return result;
+}
+
+
+JNIEXPORT jint JNICALL
+Agent_OnLoad(JavaVM *jvm, char *options, void *reserved)
+{
+    jint res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), JVMTI_VERSION_9);
+    if (res != JNI_OK || jvmti == NULL) {
+        reportError("GetEnv failed", res);
+        return JNI_ERR;
+    }
+
+    // check and save can_generate_all_class_hook_events for ONLOAD phase
+    onLoadIsAvail = isClassHookAvail();
+
+    return JNI_OK;
+}
+
+JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM *jvm, void *reserved) {
+    return JNI_VERSION_9;
+}
+
+
+JNIEXPORT jint JNICALL
+Java_CanGenerateAllClassHook_getClassHookAvail(JNIEnv *env, jclass cls) {
+    return isClassHookAvail();
+}
+
+JNIEXPORT jint JNICALL
+Java_CanGenerateAllClassHook_getOnLoadClassHookAvail(JNIEnv *env, jclass cls) {
+    return onLoadIsAvail;
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+