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view test/compiler/ciReplay/TestVM_no_comp_level.sh @ 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 | 7b23cb975cf2 |
children |
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#!/bin/sh # # 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 ## @bug 8011675 ## @summary testing of ciReplay with using generated by VM replay.txt w/o comp_level ## @author igor.ignatyev@oracle.com ## @run shell TestVM_no_comp_level.sh ## if [ "${TESTSRC}" = "" ] then TESTSRC=${PWD} echo "TESTSRC not set. Using "${TESTSRC}" as default" fi echo "TESTSRC=${TESTSRC}" ## Adding common setup Variables for running shell tests. . ${TESTSRC}/../../test_env.sh . ${TESTSRC}/common.sh generate_replay if [ ! -s ${replay_data} ] then test_fail 1 "CHECK :: REPLAY DATA GENERATION" \ "replay data wasn't generated by VM" fi ${CP} ${replay_data} replay_vm.txt sed 's/^\(compile *[^ ][^ ]* *[^ ][^ ]* [^ ][^ ]* [^ ][^ ]*\).*$/\1/' \ replay_vm.txt > ${replay_data} if [ $client_available -eq 1 ] then # tiered is unavailable in client vm, so results w/ flags will be the same as w/o flags negative_test 10 "CLIENT" -client fi if [ $server_available -eq 1 ] then positive_test 21 "SERVER :: NON-TIERED" -XX:-TieredCompilation -server positive_test 22 "SERVER :: TIERED" -XX:+TieredCompilation -server fi cleanup echo TEST PASSED