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rwestrelrobcasloz
andcommittedOct 4, 2023
8316414: C2: large byte array clone triggers "failed: malformed control flow" assertion failure on linux-x86
Co-authored-by: Roberto Castañeda Lozano <rcastanedalo@openjdk.org> Reviewed-by: thartmann
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‎src/hotspot/share/opto/type.cpp

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@@ -4750,7 +4750,7 @@ const TypeInt* TypeAryPtr::narrow_size_type(const TypeInt* size) const {
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jint hi = size->_hi;
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jint lo = size->_lo;
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jint min_lo = 0;
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jint max_hi = max_array_length(elem()->basic_type());
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jint max_hi = max_array_length(elem()->array_element_basic_type());
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//if (index_not_size) --max_hi; // type of a valid array index, FTR
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bool chg = false;
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if (lo < min_lo) {
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/*
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8316414
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* @summary C2: large byte array clone triggers "failed: malformed control flow" assertion failure on linux-x86
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* @run main/othervm -Xcomp -XX:CompileOnly=TestNewMaxLengthArray::createAndClone TestNewMaxLengthArray
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*/
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public class TestNewMaxLengthArray {
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// Maximum length of a byte array on a 32-bits platform using default object
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// alignment (8 bytes).
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static final int MAX_BYTE_ARRAY_LENGTH = 0x7ffffffc;
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public static byte[] createAndClone() {
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byte[] array = new byte[MAX_BYTE_ARRAY_LENGTH];
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return array.clone();
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}
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public static void main(String[] a) {
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try {
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createAndClone();
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} catch (OutOfMemoryError oome) {
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}
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}
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}

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