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8284951: Compile::flatten_alias_type asserts with "indeterminate poin…
…ters come only from unsafe ops"

Reviewed-by: kvn, roland
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TobiHartmann committed Apr 26, 2022
1 parent 552e1b0 commit 8de3c655457a33e64c4d1fd72603ea8b712e25cc
Showing 2 changed files with 51 additions and 1 deletion.
@@ -1294,7 +1294,7 @@ const TypePtr *Compile::flatten_alias_type( const TypePtr *tj ) const {

// Process weird unsafe references.
if (offset == Type::OffsetBot && (tj->isa_instptr() /*|| tj->isa_klassptr()*/)) {
assert(InlineUnsafeOps, "indeterminate pointers come only from unsafe ops");
assert(InlineUnsafeOps || StressReflectiveCode, "indeterminate pointers come only from unsafe ops");
assert(!is_known_inst, "scalarizable allocation should not have unsafe references");
tj = TypeOopPtr::BOTTOM;
ptr = tj->ptr();
@@ -0,0 +1,50 @@
/*
* Copyright (c) 2022, 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 8284951
* @summary Test clone intrinsic with StressReflectiveCode.
* @requires vm.debug
* @run main/othervm -XX:-InlineUnsafeOps -XX:-ReduceInitialCardMarks -XX:+StressReflectiveCode -Xbatch -XX:-TieredCompilation
* -XX:CompileCommand=dontinline,compiler.arraycopy.TestCloneWithStressReflectiveCode::test
* compiler.arraycopy.TestCloneWithStressReflectiveCode
* @run main/othervm -XX:-InlineUnsafeOps -XX:-ReduceInitialCardMarks -XX:+StressReflectiveCode -Xcomp -XX:-TieredCompilation
* compiler.arraycopy.TestCloneWithStressReflectiveCode
*/

package compiler.arraycopy;

public class TestCloneWithStressReflectiveCode implements Cloneable {

public Object test() throws CloneNotSupportedException {
return clone();
}

public static void main(String[] args) throws CloneNotSupportedException {
TestCloneWithStressReflectiveCode t = new TestCloneWithStressReflectiveCode();
for (int i = 0; i < 50_000; ++i) {
t.test();
}
}
}

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