compiledIC_sparc.cpp revision 6654:9960da40c13e 
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.
56void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) {
57#ifdef COMPILER2
58  // Stub is fixed up when the corresponding call is converted from calling
59  // compiled code to calling interpreted code.
60  // set (empty), G5
61  // jmp -1
62
63  address mark = cbuf.insts_mark();  // Get mark within main instrs section.
64
65  MacroAssembler _masm(&cbuf);
66
67  address base =
68  __ start_a_stub(to_interp_stub_size()*2);
69  if (base == NULL) return;  // CodeBuffer::expand failed.
70
71  // Static stub relocation stores the instruction address of the call.
72  __ relocate(static_stub_Relocation::spec(mark));
73
74  __ set_metadata(NULL, as_Register(Matcher::inline_cache_reg_encode()));
75
76  __ set_inst_mark();
77  AddressLiteral addrlit(-1);
78  __ JUMP(addrlit, G3, 0);
79
80  __ delayed()->nop();
81
82  // Update current stubs pointer and restore code_end.
83  __ end_a_stub();
84#else
85  ShouldNotReachHere();
86#endif
87}
88#undef __
89
90int CompiledStaticCall::to_interp_stub_size() {
91  // This doesn't need to be accurate but it must be larger or equal to
92  // the real size of the stub.
93  return (NativeMovConstReg::instruction_size +  // sethi/setlo;
94          NativeJump::instruction_size + // sethi; jmp; nop
95          (TraceJumps ? 20 * BytesPerInstWord : 0) );
96}
97
98// Relocation entries for call stub, compiled java to interpreter.
99int CompiledStaticCall::reloc_to_interp_stub() {
100  return 10;  // 4 in emit_java_to_interp + 1 in Java_Static_Call
101}
102
103void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
104  address stub = find_stub();
105  guarantee(stub != NULL, "stub not found");
106
107  if (TraceICs) {
108    ResourceMark rm;
109    tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
110                  p2i(instruction_address()),
111                  callee->name_and_sig_as_C_string());
112  }
113
114  // Creation also verifies the object.
115  NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
116  NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
117
118  assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(),
119         "a) MT-unsafe modification of inline cache");
120  assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry,
121         "b) MT-unsafe modification of inline cache");
122
123  // Update stub.
124  method_holder->set_data((intptr_t)callee());
125  jump->set_jump_destination(entry);
126
127  // Update jump to call.
128  set_destination_mt_safe(stub);
129}
130
131void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
132  assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
133  // Reset stub.
134  address stub = static_stub->addr();
135  assert(stub != NULL, "stub not found");
136  // Creation also verifies the object.
137  NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
138  NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
139  method_holder->set_data(0);
140  jump->set_jump_destination((address)-1);
141}
142
143//-----------------------------------------------------------------------------
144// Non-product mode code
145#ifndef PRODUCT
146
147void CompiledStaticCall::verify() {
148  // Verify call.
149  NativeCall::verify();
150  if (os::is_MP()) {
151    verify_alignment();
152  }
153
154  // Verify stub.
155  address stub = find_stub();
156  assert(stub != NULL, "no stub found for static call");
157  // Creation also verifies the object.
158  NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
159  NativeJump*        jump          = nativeJump_at(method_holder->next_instruction_address());
160
161  // Verify state.
162  assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
163}
164
165#endif // !PRODUCT
166