Mercurial > hg > graal-compiler
view src/share/vm/graal/graalRuntime.hpp @ 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 | 97e282186b5b |
children | 370b5f07f9e2 808348377021 |
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/* * Copyright (c) 2012, 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. */ #ifndef SHARE_VM_GRAAL_GRAAL_RUNTIME_HPP #define SHARE_VM_GRAAL_GRAAL_RUNTIME_HPP #include "interpreter/interpreter.hpp" #include "memory/allocation.hpp" #include "runtime/deoptimization.hpp" class GraalRuntime: public AllStatic { public: static void new_instance(JavaThread* thread, Klass* klass); static void new_array(JavaThread* thread, Klass* klass, jint length); static void new_multi_array(JavaThread* thread, Klass* klass, int rank, jint* dims); static void dynamic_new_array(JavaThread* thread, oop element_mirror, jint length); static jboolean thread_is_interrupted(JavaThread* thread, oop obj, jboolean clear_interrupted); static void vm_message(jboolean vmError, jlong format, jlong v1, jlong v2, jlong v3); static jint identity_hash_code(JavaThread* thread, oop obj); static address exception_handler_for_pc(JavaThread* thread); static void monitorenter(JavaThread* thread, oopDesc* obj, BasicLock* lock); static void monitorexit (JavaThread* thread, oopDesc* obj, BasicLock* lock); static void create_null_exception(JavaThread* thread); static void create_out_of_bounds_exception(JavaThread* thread, jint index); static void vm_error(JavaThread* thread, oop where, oop format, jlong value); static oop load_and_clear_exception(JavaThread* thread); static void log_printf(JavaThread* thread, oop format, jlong v1, jlong v2, jlong v3); static void log_primitive(JavaThread* thread, jchar typeChar, jlong value, jboolean newline); // Note: Must be kept in sync with constants in com.oracle.graal.replacements.Log enum { LOG_OBJECT_NEWLINE = 0x01, LOG_OBJECT_STRING = 0x02, LOG_OBJECT_ADDRESS = 0x04 }; static void log_object(JavaThread* thread, oop msg, jint flags); static void write_barrier_pre(JavaThread* thread, oopDesc* obj); static void write_barrier_post(JavaThread* thread, void* card); static jboolean validate_object(JavaThread* thread, oopDesc* parent, oopDesc* child); }; #endif // SHARE_VM_GRAAL_GRAAL_RUNTIME_HPP