1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/sparc/vm/compiledIC_sparc.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,193 @@
1.4 +/*
1.5 + * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "asm/macroAssembler.inline.hpp"
1.30 +#include "code/compiledIC.hpp"
1.31 +#include "code/icBuffer.hpp"
1.32 +#include "code/nmethod.hpp"
1.33 +#include "memory/resourceArea.hpp"
1.34 +#include "runtime/mutexLocker.hpp"
1.35 +#include "runtime/safepoint.hpp"
1.36 +#ifdef COMPILER2
1.37 +#include "opto/matcher.hpp"
1.38 +#endif
1.39 +
1.40 +// Release the CompiledICHolder* associated with this call site is there is one.
1.41 +void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) {
1.42 + // This call site might have become stale so inspect it carefully.
1.43 + NativeCall* call = nativeCall_at(call_site->addr());
1.44 + if (is_icholder_entry(call->destination())) {
1.45 + NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value());
1.46 + InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data());
1.47 + }
1.48 +}
1.49 +
1.50 +bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) {
1.51 + // This call site might have become stale so inspect it carefully.
1.52 + NativeCall* call = nativeCall_at(call_site->addr());
1.53 + return is_icholder_entry(call->destination());
1.54 +}
1.55 +
1.56 +//-----------------------------------------------------------------------------
1.57 +// High-level access to an inline cache. Guaranteed to be MT-safe.
1.58 +
1.59 +CompiledIC::CompiledIC(nmethod* nm, NativeCall* call)
1.60 + : _ic_call(call)
1.61 +{
1.62 + address ic_call = call->instruction_address();
1.63 +
1.64 + assert(ic_call != NULL, "ic_call address must be set");
1.65 + assert(nm != NULL, "must pass nmethod");
1.66 + assert(nm->contains(ic_call), "must be in nmethod");
1.67 +
1.68 + // Search for the ic_call at the given address.
1.69 + RelocIterator iter(nm, ic_call, ic_call+1);
1.70 + bool ret = iter.next();
1.71 + assert(ret == true, "relocInfo must exist at this address");
1.72 + assert(iter.addr() == ic_call, "must find ic_call");
1.73 + if (iter.type() == relocInfo::virtual_call_type) {
1.74 + virtual_call_Relocation* r = iter.virtual_call_reloc();
1.75 + _is_optimized = false;
1.76 + _value = nativeMovConstReg_at(r->cached_value());
1.77 + } else {
1.78 + assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call");
1.79 + _is_optimized = true;
1.80 + _value = NULL;
1.81 + }
1.82 +}
1.83 +
1.84 +// ----------------------------------------------------------------------------
1.85 +
1.86 +#define __ _masm.
1.87 +void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) {
1.88 +#ifdef COMPILER2
1.89 + // Stub is fixed up when the corresponding call is converted from calling
1.90 + // compiled code to calling interpreted code.
1.91 + // set (empty), G5
1.92 + // jmp -1
1.93 +
1.94 + address mark = cbuf.insts_mark(); // Get mark within main instrs section.
1.95 +
1.96 + MacroAssembler _masm(&cbuf);
1.97 +
1.98 + address base =
1.99 + __ start_a_stub(to_interp_stub_size()*2);
1.100 + if (base == NULL) return; // CodeBuffer::expand failed.
1.101 +
1.102 + // Static stub relocation stores the instruction address of the call.
1.103 + __ relocate(static_stub_Relocation::spec(mark));
1.104 +
1.105 + __ set_metadata(NULL, as_Register(Matcher::inline_cache_reg_encode()));
1.106 +
1.107 + __ set_inst_mark();
1.108 + AddressLiteral addrlit(-1);
1.109 + __ JUMP(addrlit, G3, 0);
1.110 +
1.111 + __ delayed()->nop();
1.112 +
1.113 + // Update current stubs pointer and restore code_end.
1.114 + __ end_a_stub();
1.115 +#else
1.116 + ShouldNotReachHere();
1.117 +#endif
1.118 +}
1.119 +#undef __
1.120 +
1.121 +int CompiledStaticCall::to_interp_stub_size() {
1.122 + // This doesn't need to be accurate but it must be larger or equal to
1.123 + // the real size of the stub.
1.124 + return (NativeMovConstReg::instruction_size + // sethi/setlo;
1.125 + NativeJump::instruction_size + // sethi; jmp; nop
1.126 + (TraceJumps ? 20 * BytesPerInstWord : 0) );
1.127 +}
1.128 +
1.129 +// Relocation entries for call stub, compiled java to interpreter.
1.130 +int CompiledStaticCall::reloc_to_interp_stub() {
1.131 + return 10; // 4 in emit_java_to_interp + 1 in Java_Static_Call
1.132 +}
1.133 +
1.134 +void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
1.135 + address stub = find_stub();
1.136 + guarantee(stub != NULL, "stub not found");
1.137 +
1.138 + if (TraceICs) {
1.139 + ResourceMark rm;
1.140 + tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
1.141 + instruction_address(),
1.142 + callee->name_and_sig_as_C_string());
1.143 + }
1.144 +
1.145 + // Creation also verifies the object.
1.146 + NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
1.147 + NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
1.148 +
1.149 + assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(),
1.150 + "a) MT-unsafe modification of inline cache");
1.151 + assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry,
1.152 + "b) MT-unsafe modification of inline cache");
1.153 +
1.154 + // Update stub.
1.155 + method_holder->set_data((intptr_t)callee());
1.156 + jump->set_jump_destination(entry);
1.157 +
1.158 + // Update jump to call.
1.159 + set_destination_mt_safe(stub);
1.160 +}
1.161 +
1.162 +void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
1.163 + assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
1.164 + // Reset stub.
1.165 + address stub = static_stub->addr();
1.166 + assert(stub != NULL, "stub not found");
1.167 + // Creation also verifies the object.
1.168 + NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
1.169 + NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
1.170 + method_holder->set_data(0);
1.171 + jump->set_jump_destination((address)-1);
1.172 +}
1.173 +
1.174 +//-----------------------------------------------------------------------------
1.175 +// Non-product mode code
1.176 +#ifndef PRODUCT
1.177 +
1.178 +void CompiledStaticCall::verify() {
1.179 + // Verify call.
1.180 + NativeCall::verify();
1.181 + if (os::is_MP()) {
1.182 + verify_alignment();
1.183 + }
1.184 +
1.185 + // Verify stub.
1.186 + address stub = find_stub();
1.187 + assert(stub != NULL, "no stub found for static call");
1.188 + // Creation also verifies the object.
1.189 + NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
1.190 + NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
1.191 +
1.192 + // Verify state.
1.193 + assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
1.194 +}
1.195 +
1.196 +#endif // !PRODUCT
