--- a/make/test/JtregNativeHotspot.gmk Fri Oct 06 10:39:09 2017 -0700
+++ b/make/test/JtregNativeHotspot.gmk Fri Oct 06 18:50:04 2017 +0000
@@ -59,6 +59,7 @@
$(TOPDIR)/test/hotspot/jtreg/runtime/SameObject \
$(TOPDIR)/test/hotspot/jtreg/runtime/BoolReturn \
$(TOPDIR)/test/hotspot/jtreg/runtime/noClassDefFoundMsg \
+ $(TOPDIR)/test/hotspot/jtreg/runtime/RedefineTests \
$(TOPDIR)/test/hotspot/jtreg/compiler/floatingpoint/ \
$(TOPDIR)/test/hotspot/jtreg/compiler/calls \
$(TOPDIR)/test/hotspot/jtreg/serviceability/jvmti/GetOwnedMonitorInfo \
@@ -103,6 +104,7 @@
BUILD_HOTSPOT_JTREG_LIBRARIES_LIBS_libMAAClassLoadPrepare := -lc
BUILD_HOTSPOT_JTREG_LIBRARIES_LIBS_libMAAThreadStart := -lc
BUILD_HOTSPOT_JTREG_LIBRARIES_LIBS_libAllowedFunctions := -lc
+ BUILD_HOTSPOT_JTREG_LIBRARIES_LIBS_libRedefineDoubleDelete := -lc
endif
ifeq ($(OPENJDK_TARGET_OS), linux)
--- a/src/hotspot/share/prims/jvmtiRedefineClasses.cpp Fri Oct 06 10:39:09 2017 -0700
+++ b/src/hotspot/share/prims/jvmtiRedefineClasses.cpp Fri Oct 06 18:50:04 2017 +0000
@@ -158,6 +158,11 @@
ClassLoaderData* cld = _scratch_classes[i]->class_loader_data();
// Free the memory for this class at class unloading time. Not before
// because CMS might think this is still live.
+ InstanceKlass* ik = get_ik(_class_defs[i].klass);
+ if (ik->get_cached_class_file() == _scratch_classes[i]->get_cached_class_file()) {
+ // Don't double-free cached_class_file copied from the original class if error.
+ _scratch_classes[i]->set_cached_class_file(NULL);
+ }
cld->add_to_deallocate_list(InstanceKlass::cast(_scratch_classes[i]));
}
}
@@ -3946,12 +3951,12 @@
// with them was cached on the scratch class, move to the_class.
// Note: we still want to do this if nothing needed caching since it
// should get cleared in the_class too.
- if (the_class->get_cached_class_file_bytes() == 0) {
+ if (the_class->get_cached_class_file() == 0) {
// the_class doesn't have a cache yet so copy it
the_class->set_cached_class_file(scratch_class->get_cached_class_file());
}
- else if (scratch_class->get_cached_class_file_bytes() !=
- the_class->get_cached_class_file_bytes()) {
+ else if (scratch_class->get_cached_class_file() !=
+ the_class->get_cached_class_file()) {
// The same class can be present twice in the scratch classes list or there
// are multiple concurrent RetransformClasses calls on different threads.
// In such cases we have to deallocate scratch_class cached_class_file.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/RedefineTests/RedefineDoubleDelete.java Fri Oct 06 18:50:04 2017 +0000
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2017, 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.
+ */
+
+/*
+ * @test
+ * @bug 8178870
+ * @summary Redefine class with CFLH twice to test deleting the cached_class_file
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ * @modules java.compiler
+ * java.instrument
+ * jdk.jartool/sun.tools.jar
+ * @run main RedefineClassHelper
+ * @run main/othervm/native -Xlog:redefine+class+load+exceptions -agentlib:RedefineDoubleDelete -javaagent:redefineagent.jar RedefineDoubleDelete
+ */
+
+public class RedefineDoubleDelete {
+
+ // Class gets a redefinition error because it adds a data member
+ public static String newB =
+ "class RedefineDoubleDelete$B {" +
+ " int count1 = 0;" +
+ "}";
+
+ public static String newerB =
+ "class RedefineDoubleDelete$B { " +
+ " int faa() { System.out.println(\"baa\"); return 2; }" +
+ "}";
+
+ // The ClassFileLoadHook for this class turns foo into faa and prints out faa.
+ static class B {
+ int faa() { System.out.println("foo"); return 1; }
+ }
+
+ public static void main(String args[]) throws Exception {
+
+ B b = new B();
+ int val = b.faa();
+ if (val != 1) {
+ throw new RuntimeException("return value wrong " + val);
+ }
+
+ // Redefine B twice to get cached_class_file in both B scratch classes
+ try {
+ RedefineClassHelper.redefineClass(B.class, newB);
+ } catch (java.lang.UnsupportedOperationException e) {
+ // this is expected
+ }
+ try {
+ RedefineClassHelper.redefineClass(B.class, newB);
+ } catch (java.lang.UnsupportedOperationException e) {
+ // this is expected
+ }
+
+ // Do a full GC.
+ System.gc();
+
+ // Redefine with a compatible class
+ RedefineClassHelper.redefineClass(B.class, newerB);
+ val = b.faa();
+ if (val != 2) {
+ throw new RuntimeException("return value wrong " + val);
+ }
+
+ // Do another full GC to clean things up.
+ System.gc();
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/RedefineTests/libRedefineDoubleDelete.c Fri Oct 06 18:50:04 2017 +0000
@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2017, 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"
+
+#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
+
+#define TranslateError(err) "JVMTI error"
+
+static jvmtiEnv *jvmti = NULL;
+
+static jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved);
+
+JNIEXPORT
+jint JNICALL Agent_OnLoad(JavaVM *jvm, char *options, void *reserved) {
+ return Agent_Initialize(jvm, options, reserved);
+}
+
+JNIEXPORT
+jint JNICALL Agent_OnAttach(JavaVM *jvm, char *options, void *reserved) {
+ return Agent_Initialize(jvm, options, reserved);
+}
+
+JNIEXPORT
+jint JNICALL JNI_OnLoad(JavaVM *jvm, void *reserved) {
+ return JNI_VERSION_9;
+}
+
+
+static jint newClassDataLen = 0;
+static unsigned char* newClassData = NULL;
+
+static jint
+getBytecodes(jvmtiEnv *jvmti_env,
+ jint class_data_len, const unsigned char* class_data) {
+ int i;
+ jint res;
+
+ newClassDataLen = class_data_len;
+ res = (*jvmti_env)->Allocate(jvmti_env, newClassDataLen, &newClassData);
+ if (res != JNI_OK) {
+ printf(" Unable to allocate bytes\n");
+ return JNI_ERR;
+ }
+ for (i = 0; i < newClassDataLen; i++) {
+ newClassData[i] = class_data[i];
+ // Rewrite oo in class to aa
+ if (i > 0 && class_data[i] == 'o' && class_data[i-1] == 'o') {
+ newClassData[i] = newClassData[i-1] = 'a';
+ }
+ }
+ printf(" ... copied bytecode: %d bytes\n", (int)newClassDataLen);
+ return JNI_OK;
+}
+
+
+static void JNICALL
+Callback_ClassFileLoadHook(jvmtiEnv *jvmti_env, JNIEnv *env,
+ jclass class_being_redefined,
+ jobject loader, const char* name, jobject protection_domain,
+ jint class_data_len, const unsigned char* class_data,
+ jint *new_class_data_len, unsigned char** new_class_data) {
+ if (name != NULL && strcmp(name, "RedefineDoubleDelete$B") == 0) {
+ if (newClassData == NULL) {
+ jint res = getBytecodes(jvmti_env, class_data_len, class_data);
+ if (res == JNI_ERR) {
+ printf(">>> ClassFileLoadHook event: class name %s FAILED\n", name);
+ return;
+ }
+ // Only change for first CFLH event.
+ *new_class_data_len = newClassDataLen;
+ *new_class_data = newClassData;
+ }
+ printf(">>> ClassFileLoadHook event: class name %s\n", name);
+ }
+}
+
+static
+jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
+ jint res, size;
+ jvmtiCapabilities caps;
+ jvmtiEventCallbacks callbacks;
+ jvmtiError err;
+
+ res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
+ JVMTI_VERSION_9);
+ if (res != JNI_OK || jvmti == NULL) {
+ printf(" Error: wrong result of a valid call to GetEnv!\n");
+ return JNI_ERR;
+ }
+
+ printf("Enabling following capabilities: can_generate_all_class_hook_events, "
+ "can_retransform_classes, can_redefine_classes");
+ memset(&caps, 0, sizeof(caps));
+ caps.can_generate_all_class_hook_events = 1;
+ caps.can_retransform_classes = 1;
+ caps.can_redefine_classes = 1;
+ printf("\n");
+
+ err = (*jvmti)->AddCapabilities(jvmti, &caps);
+ if (err != JVMTI_ERROR_NONE) {
+ printf(" Error in AddCapabilites: %s (%d)\n", TranslateError(err), err);
+ return JNI_ERR;
+ }
+
+ size = (jint)sizeof(callbacks);
+
+ memset(&callbacks, 0, sizeof(callbacks));
+ callbacks.ClassFileLoadHook = Callback_ClassFileLoadHook;
+
+ err = (*jvmti)->SetEventCallbacks(jvmti, &callbacks, size);
+ if (err != JVMTI_ERROR_NONE) {
+ printf(" Error in SetEventCallbacks: %s (%d)\n", TranslateError(err), err);
+ return JNI_ERR;
+ }
+
+ err = (*jvmti)->SetEventNotificationMode(jvmti, JVMTI_ENABLE, JVMTI_EVENT_CLASS_FILE_LOAD_HOOK, NULL);
+ if (err != JVMTI_ERROR_NONE) {
+ printf(" Error in SetEventNotificationMode: %s (%d)\n", TranslateError(err), err);
+ return JNI_ERR;
+ }
+
+ return JNI_OK;
+}
+
+#ifdef __cplusplus
+}
+#endif