annotate src/hotspot/cpu/x86/icache_x86.cpp @ 55984:3a3e4e473622

8222637: Obsolete NeedsDeoptSuspend Reviewed-by: dlong, coleenp, dholmes
author rehn
date Fri, 26 Apr 2019 10:18:47 +0200
parents 0cf4eccf130f
children
rev   line source
duke@1 1 /*
stefank@7397 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@1 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@1 4 *
duke@1 5 * This code is free software; you can redistribute it and/or modify it
duke@1 6 * under the terms of the GNU General Public License version 2 only, as
duke@1 7 * published by the Free Software Foundation.
duke@1 8 *
duke@1 9 * This code is distributed in the hope that it will be useful, but WITHOUT
duke@1 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@1 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@1 12 * version 2 for more details (a copy is included in the LICENSE file that
duke@1 13 * accompanied this code).
duke@1 14 *
duke@1 15 * You should have received a copy of the GNU General Public License version
duke@1 16 * 2 along with this work; if not, write to the Free Software Foundation,
duke@1 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@1 18 *
trims@5547 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@5547 20 * or visit www.oracle.com if you need additional information or have any
trims@5547 21 * questions.
duke@1 22 *
duke@1 23 */
duke@1 24
stefank@7397 25 #include "precompiled.hpp"
twisti@14626 26 #include "asm/macroAssembler.hpp"
stefank@7397 27 #include "runtime/icache.hpp"
duke@1 28
duke@1 29 #define __ _masm->
duke@1 30
duke@1 31 void ICacheStubGenerator::generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub) {
duke@1 32 StubCodeMark mark(this, "ICache", "flush_icache_stub");
duke@1 33
duke@1 34 address start = __ pc();
duke@1 35 #ifdef AMD64
duke@1 36
duke@1 37 const Register addr = c_rarg0;
duke@1 38 const Register lines = c_rarg1;
duke@1 39 const Register magic = c_rarg2;
duke@1 40
duke@1 41 Label flush_line, done;
duke@1 42
duke@1 43 __ testl(lines, lines);
duke@1 44 __ jcc(Assembler::zero, done);
duke@1 45
duke@1 46 // Force ordering wrt cflush.
duke@1 47 // Other fence and sync instructions won't do the job.
duke@1 48 __ mfence();
duke@1 49
duke@1 50 __ bind(flush_line);
duke@1 51 __ clflush(Address(addr, 0));
never@1066 52 __ addptr(addr, ICache::line_size);
duke@1 53 __ decrementl(lines);
duke@1 54 __ jcc(Assembler::notZero, flush_line);
duke@1 55
duke@1 56 __ mfence();
duke@1 57
duke@1 58 __ bind(done);
duke@1 59
duke@1 60 #else
duke@1 61 const Address magic(rsp, 3*wordSize);
duke@1 62 __ lock(); __ addl(Address(rsp, 0), 0);
duke@1 63 #endif // AMD64
never@1066 64 __ movptr(rax, magic); // Handshake with caller to make sure it happened!
duke@1 65 __ ret(0);
duke@1 66
duke@1 67 // Must be set here so StubCodeMark destructor can call the flush stub.
duke@1 68 *flush_icache_stub = (ICache::flush_icache_stub_t)start;
duke@1 69 }
duke@1 70
duke@1 71 #undef __