compiledIC_sparc.cpp revision 9111:a41fe5ffa839 
1/*
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#include "precompiled.hpp"
26#include "asm/macroAssembler.inline.hpp"
27#include "code/compiledIC.hpp"
28#include "code/icBuffer.hpp"
29#include "code/nmethod.hpp"
30#include "memory/resourceArea.hpp"
31#include "runtime/mutexLocker.hpp"
32#include "runtime/safepoint.hpp"
33#ifdef COMPILER2
34#include "opto/matcher.hpp"
35#endif
36
37// Release the CompiledICHolder* associated with this call site is there is one.
38void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) {
39  // This call site might have become stale so inspect it carefully.
40  NativeCall* call = nativeCall_at(call_site->addr());
41  if (is_icholder_entry(call->destination())) {
42    NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value());
43    InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data());
44  }
45}
46
47bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) {
48  // This call site might have become stale so inspect it carefully.
49  NativeCall* call = nativeCall_at(call_site->addr());
50  return is_icholder_entry(call->destination());
51}
52
53// ----------------------------------------------------------------------------
54
55#define __ _masm.
56address CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf, address mark) {
57  // Stub is fixed up when the corresponding call is converted from calling
58  // compiled code to calling interpreted code.
59  // set (empty), G5
60  // jmp -1
61
62  if (mark == NULL) {
63    mark = cbuf.insts_mark();  // Get mark within main instrs section.
64  }
65
66  MacroAssembler _masm(&cbuf);
67
68  address base = __ start_a_stub(to_interp_stub_size());
69  if (base == NULL) {
70    return NULL;  // CodeBuffer::expand failed.
71  }
72
73  // Static stub relocation stores the instruction address of the call.
74  __ relocate(static_stub_Relocation::spec(mark));
75
76  __ set_metadata(NULL, as_Register(Matcher::inline_cache_reg_encode()));
77
78  __ set_inst_mark();
79  AddressLiteral addrlit(-1);
80  __ JUMP(addrlit, G3, 0);
81
82  __ delayed()->nop();
83
84  assert(__ pc() - base <= to_interp_stub_size(), "wrong stub size");
85
86  // Update current stubs pointer and restore code_end.
87  __ end_a_stub();
88  return base;
89}
90#undef __
91
92int CompiledStaticCall::to_interp_stub_size() {
93  // This doesn't need to be accurate but it must be larger or equal to
94  // the real size of the stub.
95  return (NativeMovConstReg::instruction_size +  // sethi/setlo;
96          NativeJump::instruction_size + // sethi; jmp; nop
97          (TraceJumps ? 20 * BytesPerInstWord : 0) );
98}
99
100// Relocation entries for call stub, compiled java to interpreter.
101int CompiledStaticCall::reloc_to_interp_stub() {
102  return 10;  // 4 in emit_java_to_interp + 1 in Java_Static_Call
103}
104
105void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
106  address stub = find_stub();
107  guarantee(stub != NULL, "stub not found");
108
109  if (TraceICs) {
110    ResourceMark rm;
111    tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
112                  p2i(instruction_address()),
113                  callee->name_and_sig_as_C_string());
114  }
115
116  // Creation also verifies the object.
117  NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
118  NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
119
120  assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(),
121         "a) MT-unsafe modification of inline cache");
122  assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry,
123         "b) MT-unsafe modification of inline cache");
124
125  // Update stub.
126  method_holder->set_data((intptr_t)callee());
127  jump->set_jump_destination(entry);
128
129  // Update jump to call.
130  set_destination_mt_safe(stub);
131}
132
133void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
134  assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
135  // Reset stub.
136  address stub = static_stub->addr();
137  assert(stub != NULL, "stub not found");
138  // Creation also verifies the object.
139  NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
140  NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
141  method_holder->set_data(0);
142  jump->set_jump_destination((address)-1);
143}
144
145//-----------------------------------------------------------------------------
146// Non-product mode code
147#ifndef PRODUCT
148
149void CompiledStaticCall::verify() {
150  // Verify call.
151  NativeCall::verify();
152  if (os::is_MP()) {
153    verify_alignment();
154  }
155
156  // Verify stub.
157  address stub = find_stub();
158  assert(stub != NULL, "no stub found for static call");
159  // Creation also verifies the object.
160  NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
161  NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
162
163  // Verify state.
164  assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
165}
166
167#endif // !PRODUCT
168