8134321: tools/pack200/Pack200Test.java crashes in the VM PIT jdk9 b79
Summary: Code that capture field values of eliminated allocation at a safepoint when there's an arraycopy behind a Phi is broken
Reviewed-by: kvn
--- a/hotspot/src/share/vm/opto/macro.cpp Tue Aug 25 07:49:55 2015 +0200
+++ b/hotspot/src/share/vm/opto/macro.cpp Wed Aug 26 09:49:37 2015 +0200
@@ -521,6 +521,9 @@
return NULL;
} else if (val->is_ArrayCopy()) {
Node* res = make_arraycopy_load(val->as_ArrayCopy(), offset, val->in(0), ft, phi_type, alloc);
+ if (res == NULL) {
+ return NULL;
+ }
values.at_put(j, res);
} else {
#ifdef ASSERT
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/arraycopy/TestEliminatedArrayCopyPhi.java Wed Aug 26 09:49:37 2015 +0200
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2015, 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 8134321
+ * @summary Code that capture field values of eliminated allocation at a safepoint when there's an arraycopy behind a Phi is broken
+ * @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement TestEliminatedArrayCopyPhi
+ *
+ */
+
+public class TestEliminatedArrayCopyPhi {
+
+ static int[] escaped;
+
+ static void test(int[] src, boolean flag1, boolean flag2) {
+ int[] array = new int[10];
+ if (flag1) {
+ System.arraycopy(src, 0, array, 0, src.length);
+ } else {
+ }
+
+ if (flag2) {
+ // never taken
+ escaped = array;
+ }
+ }
+
+ public static void main(String[] args) {
+ int[] src = new int[10];
+ for (int i = 0; i < 20000; i++) {
+ test(src, (i % 2) == 0, false);
+ }
+ }
+}