Skip to content
Permalink
Browse files
8258243: C2: assert failed ("Bad derived pointer") with -XX:+VerifyRe…
…gisterAllocator

Reviewed-by: kvn, thartmann
  • Loading branch information
chhagedorn committed Jan 12, 2021
1 parent 4663704 commit a3561ae8a435dba7d4127090b4a447f8216b01e9
Showing with 43 additions and 3 deletions.
  1. +3 −3 src/hotspot/share/opto/chaitin.cpp
  2. +40 −0 test/hotspot/jtreg/compiler/regalloc/TestVerifyRegisterAllocator.java
@@ -2406,9 +2406,9 @@ void PhaseChaitin::verify_base_ptrs(ResourceArea* a) const {
worklist.push(check->in(m));
}
} else if (check->is_Con()) {
if (is_derived) {
// Derived is NULL+offset
assert(!is_derived || check->bottom_type()->is_ptr()->ptr() == TypePtr::Null, "Bad derived pointer");
if (is_derived && check->bottom_type()->is_ptr()->_offset != 0) {
// Derived is NULL+non-zero offset, base must be NULL.
assert(check->bottom_type()->is_ptr()->ptr() == TypePtr::Null, "Bad derived pointer");
} else {
assert(check->bottom_type()->is_ptr()->_offset == 0, "Bad base pointer");
// Base either ConP(NULL) or loadConP
@@ -0,0 +1,40 @@
/*
* Copyright (c) 2021, 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 8258243
* @requires vm.debug == true & vm.compiler2.enabled
* @summary Sanity check the -XX:+VerifyRegisterAllocator flag in a hello world program.
*
* @run main/othervm -Xcomp -XX:-TieredCompilation -XX:+VerifyRegisterAllocator
* compiler.regalloc.TestVerifyRegisterAllocator
*/
package compiler.regalloc;

public class TestVerifyRegisterAllocator {
public static void main(String[] strArr) {
System.out.println("Hello world!");
}
}

1 comment on commit a3561ae

@openjdk-notifier

This comment has been minimized.

Copy link

@openjdk-notifier openjdk-notifier bot commented on a3561ae Jan 12, 2021

Please sign in to comment.