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comparison src/cpu/sparc/vm/compiledIC_sparc.cpp @ 10408:836a62f43af9

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Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
author Doug Simon <doug.simon@oracle.com>
date Wed, 19 Jun 2013 10:45:56 +0200
parents a6e09d6dd8e5
children 36bcc10e01c0 c64b6b0c40c8
comparison
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10086:e0fb8a213650 10408:836a62f43af9
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.
38 void 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
47 bool 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 // High-level access to an inline cache. Guaranteed to be MT-safe.
55
56 CompiledIC::CompiledIC(nmethod* nm, NativeCall* call)
57 : _ic_call(call)
58 {
59 address ic_call = call->instruction_address();
60
61 assert(ic_call != NULL, "ic_call address must be set");
62 assert(nm != NULL, "must pass nmethod");
63 assert(nm->contains(ic_call), "must be in nmethod");
64
65 // Search for the ic_call at the given address.
66 RelocIterator iter(nm, ic_call, ic_call+1);
67 bool ret = iter.next();
68 assert(ret == true, "relocInfo must exist at this address");
69 assert(iter.addr() == ic_call, "must find ic_call");
70 if (iter.type() == relocInfo::virtual_call_type) {
71 virtual_call_Relocation* r = iter.virtual_call_reloc();
72 _is_optimized = false;
73 _value = nativeMovConstReg_at(r->cached_value());
74 } else {
75 assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call");
76 _is_optimized = true;
77 _value = NULL;
78 }
79 }
80
81 // ----------------------------------------------------------------------------
82
83 #define __ _masm.
84 void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) {
85 #ifdef COMPILER2
86 // Stub is fixed up when the corresponding call is converted from calling
87 // compiled code to calling interpreted code.
88 // set (empty), G5
89 // jmp -1
90
91 address mark = cbuf.insts_mark(); // Get mark within main instrs section.
92
93 MacroAssembler _masm(&cbuf);
94
95 address base =
96 __ start_a_stub(to_interp_stub_size()*2);
97 if (base == NULL) return; // CodeBuffer::expand failed.
98
99 // Static stub relocation stores the instruction address of the call.
100 __ relocate(static_stub_Relocation::spec(mark));
101
102 __ set_metadata(NULL, as_Register(Matcher::inline_cache_reg_encode()));
103
104 __ set_inst_mark();
105 AddressLiteral addrlit(-1);
106 __ JUMP(addrlit, G3, 0);
107
108 __ delayed()->nop();
109
110 // Update current stubs pointer and restore code_end.
111 __ end_a_stub();
112 #else
113 ShouldNotReachHere();
114 #endif
115 }
116 #undef __
117
118 int CompiledStaticCall::to_interp_stub_size() {
119 // This doesn't need to be accurate but it must be larger or equal to
120 // the real size of the stub.
121 return (NativeMovConstReg::instruction_size + // sethi/setlo;
122 NativeJump::instruction_size + // sethi; jmp; nop
123 (TraceJumps ? 20 * BytesPerInstWord : 0) );
124 }
125
126 // Relocation entries for call stub, compiled java to interpreter.
127 int CompiledStaticCall::reloc_to_interp_stub() {
128 return 10; // 4 in emit_java_to_interp + 1 in Java_Static_Call
129 }
130
131 void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
132 address stub = find_stub();
133 guarantee(stub != NULL, "stub not found");
134
135 if (TraceICs) {
136 ResourceMark rm;
137 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
138 instruction_address(),
139 callee->name_and_sig_as_C_string());
140 }
141
142 // Creation also verifies the object.
143 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
144 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
145
146 assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(),
147 "a) MT-unsafe modification of inline cache");
148 assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry,
149 "b) MT-unsafe modification of inline cache");
150
151 // Update stub.
152 method_holder->set_data((intptr_t)callee());
153 jump->set_jump_destination(entry);
154
155 // Update jump to call.
156 set_destination_mt_safe(stub);
157 }
158
159 void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
160 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
161 // Reset stub.
162 address stub = static_stub->addr();
163 assert(stub != NULL, "stub not found");
164 // Creation also verifies the object.
165 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
166 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
167 method_holder->set_data(0);
168 jump->set_jump_destination((address)-1);
169 }
170
171 //-----------------------------------------------------------------------------
172 // Non-product mode code
173 #ifndef PRODUCT
174
175 void CompiledStaticCall::verify() {
176 // Verify call.
177 NativeCall::verify();
178 if (os::is_MP()) {
179 verify_alignment();
180 }
181
182 // Verify stub.
183 address stub = find_stub();
184 assert(stub != NULL, "no stub found for static call");
185 // Creation also verifies the object.
186 NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
187 NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
188
189 // Verify state.
190 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
191 }
192
193 #endif // !PRODUCT