Mercurial > hg > graal-compiler
annotate make/templates/gpl-header @ 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 | b2045e0af26e |
children |
rev | line source |
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1807
b2045e0af26e
6987149: Fix incorrect Oracle copyright header in make/templates files
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1 Copyright (c) %YEARS%, Oracle and/or its affiliates. All rights reserved. |
0 | 2 DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
3 | |
4 This code is free software; you can redistribute it and/or modify it | |
5 under the terms of the GNU General Public License version 2 only, as | |
6 published by the Free Software Foundation. | |
7 | |
8 This code is distributed in the hope that it will be useful, but WITHOUT | |
9 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
11 version 2 for more details (a copy is included in the LICENSE file that | |
12 accompanied this code). | |
13 | |
14 You should have received a copy of the GNU General Public License version | |
15 2 along with this work; if not, write to the Free Software Foundation, | |
16 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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18 Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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19 or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 questions. |