Mercurial > hg > graal-compiler
view src/share/vm/ci/ciSymbol.cpp @ 2149:7e37af9d69ef
7011379: G1: overly long concurrent marking cycles
Summary: This changeset introduces filtering of SATB buffers at the point when they are about to be enqueued. If this filtering clears enough entries on each buffer, the buffer can then be re-used and not enqueued. This cuts down the number of SATB buffers that need to be processed by the concurrent marking threads.
Reviewed-by: johnc, ysr
author | tonyp |
---|---|
date | Wed, 19 Jan 2011 09:35:17 -0500 |
parents | f95d63e2154a |
children | 3582bf76420e |
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/* * Copyright (c) 1999, 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 "ci/ciSymbol.hpp" #include "ci/ciUtilities.hpp" #include "memory/oopFactory.hpp" // ------------------------------------------------------------------ // ciSymbol::ciSymbol // // Preallocated handle variant. Used with handles from vmSymboHandles. ciSymbol::ciSymbol(symbolHandle h_s, vmSymbols::SID sid) : ciObject(h_s), _sid(sid) { assert(sid_ok(), "must be in vmSymbols"); } // Normal case for non-famous symbols. ciSymbol::ciSymbol(symbolOop s) : ciObject(s), _sid(vmSymbols::NO_SID) { assert(sid_ok(), "must not be in vmSymbols"); } // ciSymbol // // This class represents a symbolOop in the HotSpot virtual // machine. // ------------------------------------------------------------------ // ciSymbol::as_utf8 // // The text of the symbol as a null-terminated C string. const char* ciSymbol::as_utf8() { VM_QUICK_ENTRY_MARK; symbolOop s = get_symbolOop(); return s->as_utf8(); } // ------------------------------------------------------------------ // ciSymbol::base jbyte* ciSymbol::base() { GUARDED_VM_ENTRY(return get_symbolOop()->base();) } // ------------------------------------------------------------------ // ciSymbol::byte_at int ciSymbol::byte_at(int i) { GUARDED_VM_ENTRY(return get_symbolOop()->byte_at(i);) } // ------------------------------------------------------------------ // ciSymbol::starts_with // // Tests if the symbol starts with the given prefix. bool ciSymbol::starts_with(const char* prefix, int len) const { GUARDED_VM_ENTRY(return get_symbolOop()->starts_with(prefix, len);) } // ------------------------------------------------------------------ // ciSymbol::index_of // // Determines where the symbol contains the given substring. int ciSymbol::index_of_at(int i, const char* str, int len) const { GUARDED_VM_ENTRY(return get_symbolOop()->index_of_at(i, str, len);) } // ------------------------------------------------------------------ // ciSymbol::utf8_length int ciSymbol::utf8_length() { GUARDED_VM_ENTRY(return get_symbolOop()->utf8_length();) } // ------------------------------------------------------------------ // ciSymbol::print_impl // // Implementation of the print method void ciSymbol::print_impl(outputStream* st) { st->print(" value="); print_symbol_on(st); } // ------------------------------------------------------------------ // ciSymbol::print_symbol_on // // Print the value of this symbol on an outputStream void ciSymbol::print_symbol_on(outputStream *st) { GUARDED_VM_ENTRY(get_symbolOop()->print_symbol_on(st);) } // ------------------------------------------------------------------ // ciSymbol::make_impl // // Make a ciSymbol from a C string (implementation). ciSymbol* ciSymbol::make_impl(const char* s) { EXCEPTION_CONTEXT; // For some reason, oopFactory::new_symbol doesn't declare its // char* argument as const. symbolOop sym = oopFactory::new_symbol((char*)s, (int)strlen(s), THREAD); if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; CURRENT_THREAD_ENV->record_out_of_memory_failure(); return ciEnv::_unloaded_cisymbol; } return CURRENT_THREAD_ENV->get_object(sym)->as_symbol(); } // ------------------------------------------------------------------ // ciSymbol::make // // Make a ciSymbol from a C string. ciSymbol* ciSymbol::make(const char* s) { GUARDED_VM_ENTRY(return make_impl(s);) }