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view test/compiler/whitebox/EnqueueMethodForCompilationTest.java @ 11825:463f51256c86
AMD64HotSpot: emit jump to IC miss handler directly instead of emitting it inside verfied_entry
for empty methods we emitted something like this if a inline cache is needed:
prefix:
00: < IC check >
...
0b: jne <ic_miss_call>
11: nop
...
verified_entry:
20: ret
ic_miss_call:
21: jmp <entry of runtime function>
when a method is deoptimized, HotSpot patches the verified_entry (0x20) with a
jump to a stub that handles call-sites that has been made non-entrant. since this jump
is 5 bytes long, it will overwrite ic_miss_call and blow up every caller that
calls this method via the unverified entry (prefix).
the fix is to emit the jump to the runtime function inside the unverfied entry:
prefix:
00: < IC check >
...
0b: je <verified_entry>
11: jeq <entry of runtime function>
16: nop
...
verified_entry:
20: ret
author | Bernhard Urban <bernhard.urban@jku.at> |
---|---|
date | Mon, 30 Sep 2013 09:32:18 +0200 |
parents | 4b2eebe03f93 |
children | 11237ee74aae |
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/* * Copyright (c) 2013, 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 EnqueueMethodForCompilationTest * @library /testlibrary /testlibrary/whitebox * @build EnqueueMethodForCompilationTest * @run main ClassFileInstaller sun.hotspot.WhiteBox * @run main/othervm -Xbootclasspath/a:. -Xmixed -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI EnqueueMethodForCompilationTest * @summary testing of WB::enqueueMethodForCompilation() * @author igor.ignatyev@oracle.com */ public class EnqueueMethodForCompilationTest extends CompilerWhiteBoxTest { public static void main(String[] args) throws Exception { for (TestCase test : TestCase.values()) { new EnqueueMethodForCompilationTest(test).runTest(); } } public EnqueueMethodForCompilationTest(TestCase testCase) { super(testCase); // to prevent inlining of #method WHITE_BOX.testSetDontInlineMethod(method, true); } @Override protected void test() throws Exception { checkNotCompiled(); // method can not be compiled on level 'none' WHITE_BOX.enqueueMethodForCompilation(method, COMP_LEVEL_NONE); if (WHITE_BOX.isMethodCompilable(method, COMP_LEVEL_NONE)) { throw new RuntimeException(method + " is compilable at level COMP_LEVEL_NONE"); } checkNotCompiled(); // COMP_LEVEL_ANY is inapplicable as level for compilation WHITE_BOX.enqueueMethodForCompilation(method, COMP_LEVEL_ANY); checkNotCompiled(); WHITE_BOX.enqueueMethodForCompilation(method, 5); if (!WHITE_BOX.isMethodCompilable(method, 5)) { checkNotCompiled(); compile(); checkCompiled(); } else { checkCompiled(); } int compLevel = WHITE_BOX.getMethodCompilationLevel(method); WHITE_BOX.deoptimizeMethod(method); checkNotCompiled(); WHITE_BOX.enqueueMethodForCompilation(method, compLevel); checkCompiled(); WHITE_BOX.deoptimizeMethod(method); checkNotCompiled(); compile(); checkCompiled(); WHITE_BOX.deoptimizeMethod(method); checkNotCompiled(); } }