Mercurial > hg > truffle
view src/cpu/sparc/vm/c1_MacroAssembler_sparc.hpp @ 453:c96030fff130
6684579: SoftReference processing can be made more efficient
Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa
| author | ysr |
|---|---|
| date | Thu, 20 Nov 2008 16:56:09 -0800 |
| parents | a61af66fc99e |
| children | c18cbe5936b8 |
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/* * Copyright 1999-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ void pd_init() { /* nothing to do */ } public: void try_allocate( Register obj, // result: pointer to object after successful allocation Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise int con_size_in_bytes, // object size in bytes if known at compile time Register t1, // temp register Register t2, // temp register Label& slow_case // continuation point if fast allocation fails ); void initialize_header(Register obj, Register klass, Register len, Register t1, Register t2); void initialize_body(Register base, Register index); // locking/unlocking void lock_object (Register Rmark, Register Roop, Register Rbox, Register Rscratch, Label& slow_case); void unlock_object(Register Rmark, Register Roop, Register Rbox, Label& slow_case); void initialize_object( Register obj, // result: pointer to object after successful allocation Register klass, // object klass Register var_size_in_bytes, // object size in bytes if unknown at compile time; invalid otherwise int con_size_in_bytes, // object size in bytes if known at compile time Register t1, // temp register Register t2 // temp register ); // allocation of fixed-size objects // (can also be used to allocate fixed-size arrays, by setting // hdr_size correctly and storing the array length afterwards) void allocate_object( Register obj, // result: pointer to object after successful allocation Register t1, // temp register Register t2, // temp register Register t3, // temp register int hdr_size, // object header size in words int obj_size, // object size in words Register klass, // object klass Label& slow_case // continuation point if fast allocation fails ); enum { max_array_allocation_length = 0x01000000 // sparc friendly value, requires sethi only }; // allocation of arrays void allocate_array( Register obj, // result: pointer to array after successful allocation Register len, // array length Register t1, // temp register Register t2, // temp register Register t3, // temp register int hdr_size, // object header size in words int elt_size, // element size in bytes Register klass, // object klass Label& slow_case // continuation point if fast allocation fails ); // invalidates registers in this window void invalidate_registers(bool iregisters, bool lregisters, bool oregisters, Register preserve1 = noreg, Register preserve2 = noreg);