diff --git a/src/hotspot/share/opto/callnode.cpp b/src/hotspot/share/opto/callnode.cpp index 0c046a1e1f7..268cec7732c 100644 --- a/src/hotspot/share/opto/callnode.cpp +++ b/src/hotspot/share/opto/callnode.cpp @@ -874,7 +874,7 @@ void CallNode::extract_projections(CallProjections* projs, bool separate_io_proj // For Control (fallthrough) and I_O (catch_all_index) we have CatchProj -> Catch -> Proj projs->fallthrough_proj = pn; const Node *cn = pn->unique_ctrl_out(); - if (cn->is_Catch()) { + if (cn != NULL && cn->is_Catch()) { ProjNode *cpn = NULL; for (DUIterator_Fast kmax, k = cn->fast_outs(kmax); k < kmax; k++) { cpn = cn->fast_out(k)->as_Proj(); diff --git a/test/hotspot/jtreg/gc/shenandoah/compiler/TestBarrierExpandCallProjection.java b/test/hotspot/jtreg/gc/shenandoah/compiler/TestBarrierExpandCallProjection.java new file mode 100644 index 00000000000..9d5a5d44f19 --- /dev/null +++ b/test/hotspot/jtreg/gc/shenandoah/compiler/TestBarrierExpandCallProjection.java @@ -0,0 +1,49 @@ +/* + * Copyright (c) 2020, Red Hat, Inc. 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 8252296 + * @summary Shenandoah: crash in CallNode::extract_projections + * @requires vm.gc.Shenandoah + * + * @run main/othervm -XX:-BackgroundCompilation -XX:-TieredCompilation -XX:+UseShenandoahGC -XX:CompileOnly=TestBarrierExpandCallProjection::test TestBarrierExpandCallProjection + * + */ + +public class TestBarrierExpandCallProjection { + static TestBarrierExpandCallProjection test = new TestBarrierExpandCallProjection(); + private int field; + + public static void main(String[] args) { + test(); + } + + private static int test() { + int v = 0; + for (int i = 0; i < 100_000; i++) { + v += test.field; + } + return v; + } +}