Mercurial > hg > graal-compiler
view src/share/vm/runtime/threadLocalStorage.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 | f08d439fab8c |
children | bdd155477289 |
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/* * Copyright (c) 1997, 2011, 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_RUNTIME_THREADLOCALSTORAGE_HPP #define SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP #include "gc_implementation/shared/gcUtil.hpp" #include "runtime/os.hpp" #include "utilities/top.hpp" // Interface for thread local storage // Fast variant of ThreadLocalStorage::get_thread_slow extern "C" Thread* get_thread(); // Get raw thread id: e.g., %g7 on sparc, fs or gs on x86 extern "C" uintptr_t _raw_thread_id(); class ThreadLocalStorage : AllStatic { public: static void set_thread(Thread* thread); static Thread* get_thread_slow(); static void invalidate_all() { pd_invalidate_all(); } // Machine dependent stuff #ifdef TARGET_OS_ARCH_linux_x86 # include "threadLS_linux_x86.hpp" #endif #ifdef TARGET_OS_ARCH_linux_sparc # include "threadLS_linux_sparc.hpp" #endif #ifdef TARGET_OS_ARCH_linux_zero # include "threadLS_linux_zero.hpp" #endif #ifdef TARGET_OS_ARCH_solaris_x86 # include "threadLS_solaris_x86.hpp" #endif #ifdef TARGET_OS_ARCH_solaris_sparc # include "threadLS_solaris_sparc.hpp" #endif #ifdef TARGET_OS_ARCH_windows_x86 # include "threadLS_windows_x86.hpp" #endif #ifdef TARGET_OS_ARCH_linux_arm # include "threadLS_linux_arm.hpp" #endif #ifdef TARGET_OS_ARCH_linux_ppc # include "threadLS_linux_ppc.hpp" #endif #ifdef TARGET_OS_ARCH_bsd_x86 # include "threadLS_bsd_x86.hpp" #endif #ifdef TARGET_OS_ARCH_bsd_zero # include "threadLS_bsd_zero.hpp" #endif public: // Accessor static inline int thread_index() { return _thread_index; } static inline void set_thread_index(int index) { _thread_index = index; } // Initialization // Called explicitly from VMThread::activate_system instead of init_globals. static void init(); static bool is_initialized(); private: static int _thread_index; static void generate_code_for_get_thread(); // Processor dependent parts of set_thread and initialization static void pd_set_thread(Thread* thread); static void pd_init(); // Invalidate any thread cacheing or optimization schemes. static void pd_invalidate_all(); }; #endif // SHARE_VM_RUNTIME_THREADLOCALSTORAGE_HPP