Mercurial > hg > graal-compiler
view src/share/vm/runtime/osThread.cpp @ 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 | f95d63e2154a |
children | 78bbf4d43a14 |
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/* * Copyright (c) 1997, 2010, 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. * */ #include "precompiled.hpp" #include "oops/oop.inline.hpp" #include "runtime/osThread.hpp" OSThread::OSThread(OSThreadStartFunc start_proc, void* start_parm) { pd_initialize(); set_start_proc(start_proc); set_start_parm(start_parm); set_interrupted(false); } OSThread::~OSThread() { pd_destroy(); } // Printing void OSThread::print_on(outputStream *st) const { st->print("nid=0x%lx ", thread_id()); switch (_state) { case ALLOCATED: st->print("allocated "); break; case INITIALIZED: st->print("initialized "); break; case RUNNABLE: st->print("runnable "); break; case MONITOR_WAIT: st->print("waiting for monitor entry "); break; case CONDVAR_WAIT: st->print("waiting on condition "); break; case OBJECT_WAIT: st->print("in Object.wait() "); break; case BREAKPOINTED: st->print("at breakpoint"); break; case SLEEPING: st->print("sleeping"); break; case ZOMBIE: st->print("zombie"); break; default: st->print("unknown state %d", _state); break; } }