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8144466: ppc64: fix argument passing through opto stubs

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Reviewed-by: kvn
This commit is contained in:
Goetz Lindenmaier 2015-12-07 15:42:47 +01:00
parent 223668aab4
commit 6f27a97d77
10 changed files with 229 additions and 22 deletions
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69
hotspot/test/compiler/arraycopy/TestArrayCopyOverflowArguments.java Normal file
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/*
* Copyright (c) 2015 SAP SE. 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
* @summary Test that overflowed integers passed to arraycopy don't do any harm. This might
* be the case on platforms where C-code expects that ints passed to a call
* are properly sign extended to 64 bit (e.g., PPC64, s390x). This can fail
* if slow_arraycopy_C() is commpiled by the C compiler without any imlicit
* casts (as spill stores to the stack that are done with 4-byte instruction).
* @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement TestArrayCopyOverflowArguments
*
*/
public class TestArrayCopyOverflowArguments {
// Without volatile the overflowing computation was moved up and then
// spilled to the stack. The 32-bit spill store caused proper rounding.
static volatile int mod = Integer.MAX_VALUE;
public static int[] m1(Object src) {
if (src == null) return null;
int[] dest = new int[10];
try {
// PPC C calling conventions require that ints are properly expanded
// to longs when passed to a function.
int pos = 8 + mod + mod; // = 0x1_0000_0006.
int start = 2 + mod + mod; // = 0x1_0000_0000.
int len = 12 + mod + mod; // = 0x1_0000_0010.
// This is supposed to call SharedRuntime::slow_arraycopy_C().
System.arraycopy(src, pos, dest, 0, 10);
} catch (ArrayStoreException npe) {
}
return dest;
}
static public void main(String[] args) throws Exception {
int[] src = new int[20];
for (int i = 0; i < 20; ++i) {
src[i] = i * (i-1);
}
for (int i = 0; i < 20000; i++) {
m1(src);
}
}
}