/*
* 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 "asm/macroAssembler.hpp"
#include "runtime/icache.hpp"
#define __ _masm->
void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) {
StubCodeMark mark(this , "ICache" , "flush_icache_stub" );
address start = __ pc();
#ifdef AMD64
const Register addr = c_rarg0;
const Register lines = c_rarg1;
const Register magic = c_rarg2;
Label flush_line, done;
__ testl(lines, lines);
__ jcc(Assembler::zero, done);
// Force ordering wrt cflush.
// Other fence and sync instructions won't do the job.
__ mfence();
__ bind(flush_line);
__ clflush(Address(addr, 0 ));
__ addptr(addr, ICache::line_size);
__ decrementl(lines);
__ jcc(Assembler::notZero, flush_line);
__ mfence();
__ bind(done);
#else
const Address magic(rsp, 3 *wordSize);
__ lock(); __ addl(Address(rsp, 0 ), 0 );
#endif // AMD64
__ movptr(rax, magic); // Handshake with caller to make sure it happened!
__ ret(0 );
// Must be set here so StubCodeMark destructor can call the flush stub.
*flush_icache_stub = (ICache::flush_icache_stub_t)start;
}
#undef __
Messung V0.5 in Prozent C=92 H=100 G=95
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(vorverarbeitet am 2026-09-07)
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