Mercurial > hg > graal-jvmci-8
annotate src/share/vm/code/icBuffer.cpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
author | coleenp |
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date | Thu, 27 Jan 2011 16:11:27 -0800 |
parents | f95d63e2154a |
children | b92c45f2bc75 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "code/compiledIC.hpp" | |
27 #include "code/icBuffer.hpp" | |
28 #include "code/nmethod.hpp" | |
29 #include "code/scopeDesc.hpp" | |
30 #include "gc_interface/collectedHeap.inline.hpp" | |
31 #include "interpreter/interpreter.hpp" | |
32 #include "interpreter/linkResolver.hpp" | |
33 #include "memory/resourceArea.hpp" | |
34 #include "memory/universe.inline.hpp" | |
35 #include "oops/methodOop.hpp" | |
36 #include "oops/oop.inline.hpp" | |
37 #include "oops/oop.inline2.hpp" | |
38 #include "runtime/mutexLocker.hpp" | |
39 #include "runtime/stubRoutines.hpp" | |
40 #ifdef TARGET_ARCH_x86 | |
41 # include "assembler_x86.inline.hpp" | |
42 #endif | |
43 #ifdef TARGET_ARCH_sparc | |
44 # include "assembler_sparc.inline.hpp" | |
45 #endif | |
46 #ifdef TARGET_ARCH_zero | |
47 # include "assembler_zero.inline.hpp" | |
48 #endif | |
0 | 49 |
50 | |
51 DEF_STUB_INTERFACE(ICStub); | |
52 | |
53 StubQueue* InlineCacheBuffer::_buffer = NULL; | |
54 ICStub* InlineCacheBuffer::_next_stub = NULL; | |
55 | |
56 | |
57 void ICStub::finalize() { | |
58 if (!is_empty()) { | |
59 ResourceMark rm; | |
60 CompiledIC *ic = CompiledIC_at(ic_site()); | |
61 assert(CodeCache::find_nmethod(ic->instruction_address()) != NULL, "inline cache in non-nmethod?"); | |
62 | |
63 assert(this == ICStub_from_destination_address(ic->stub_address()), "wrong owner of ic buffer"); | |
64 ic->set_cached_oop(cached_oop()); | |
65 ic->set_ic_destination(destination()); | |
66 } | |
67 } | |
68 | |
69 | |
70 address ICStub::destination() const { | |
71 return InlineCacheBuffer::ic_buffer_entry_point(code_begin()); | |
72 } | |
73 | |
74 oop ICStub::cached_oop() const { | |
75 return InlineCacheBuffer::ic_buffer_cached_oop(code_begin()); | |
76 } | |
77 | |
78 | |
79 void ICStub::set_stub(CompiledIC *ic, oop cached_value, address dest_addr) { | |
80 // We cannot store a pointer to the 'ic' object, since it is resource allocated. Instead we | |
81 // store the location of the inline cache. Then we have enough information recreate the CompiledIC | |
82 // object when we need to remove the stub. | |
83 _ic_site = ic->instruction_address(); | |
84 | |
85 // Assemble new stub | |
86 InlineCacheBuffer::assemble_ic_buffer_code(code_begin(), cached_value, dest_addr); | |
87 assert(destination() == dest_addr, "can recover destination"); | |
88 assert(cached_oop() == cached_value, "can recover destination"); | |
89 } | |
90 | |
91 | |
92 void ICStub::clear() { | |
93 _ic_site = NULL; | |
94 } | |
95 | |
96 | |
97 #ifndef PRODUCT | |
98 // anybody calling to this stub will trap | |
99 | |
100 void ICStub::verify() { | |
101 } | |
102 | |
103 void ICStub::print() { | |
104 tty->print_cr("ICStub: site: " INTPTR_FORMAT, _ic_site); | |
105 } | |
106 #endif | |
107 | |
108 //----------------------------------------------------------------------------------------------- | |
109 // Implementation of InlineCacheBuffer | |
110 | |
111 void InlineCacheBuffer::init_next_stub() { | |
112 ICStub* ic_stub = (ICStub*)buffer()->request_committed (ic_stub_code_size()); | |
113 assert (ic_stub != NULL, "no room for a single stub"); | |
114 set_next_stub(ic_stub); | |
115 } | |
116 | |
117 void InlineCacheBuffer::initialize() { | |
118 if (_buffer != NULL) return; // already initialized | |
119 _buffer = new StubQueue(new ICStubInterface, 10*K, InlineCacheBuffer_lock, "InlineCacheBuffer"); | |
120 assert (_buffer != NULL, "cannot allocate InlineCacheBuffer"); | |
121 init_next_stub(); | |
122 } | |
123 | |
124 | |
125 ICStub* InlineCacheBuffer::new_ic_stub() { | |
126 while (true) { | |
127 ICStub* ic_stub = (ICStub*)buffer()->request_committed(ic_stub_code_size()); | |
128 if (ic_stub != NULL) { | |
129 return ic_stub; | |
130 } | |
131 // we ran out of inline cache buffer space; must enter safepoint. | |
132 // We do this by forcing a safepoint | |
133 EXCEPTION_MARK; | |
134 | |
135 VM_ForceSafepoint vfs; | |
136 VMThread::execute(&vfs); | |
137 // We could potential get an async. exception at this point. | |
138 // In that case we will rethrow it to ourselvs. | |
139 if (HAS_PENDING_EXCEPTION) { | |
140 oop exception = PENDING_EXCEPTION; | |
141 CLEAR_PENDING_EXCEPTION; | |
142 Thread::send_async_exception(JavaThread::current()->threadObj(), exception); | |
143 } | |
144 } | |
145 ShouldNotReachHere(); | |
146 return NULL; | |
147 } | |
148 | |
149 | |
150 void InlineCacheBuffer::update_inline_caches() { | |
151 if (buffer()->number_of_stubs() > 1) { | |
152 if (TraceICBuffer) { | |
153 tty->print_cr("[updating inline caches with %d stubs]", buffer()->number_of_stubs()); | |
154 } | |
155 buffer()->remove_all(); | |
156 init_next_stub(); | |
157 } | |
158 } | |
159 | |
160 | |
161 bool InlineCacheBuffer::contains(address instruction_address) { | |
162 return buffer()->contains(instruction_address); | |
163 } | |
164 | |
165 | |
166 bool InlineCacheBuffer::is_empty() { | |
167 return buffer()->number_of_stubs() == 1; // always has sentinel | |
168 } | |
169 | |
170 | |
171 void InlineCacheBuffer_init() { | |
172 InlineCacheBuffer::initialize(); | |
173 } | |
174 | |
175 | |
176 void InlineCacheBuffer::create_transition_stub(CompiledIC *ic, oop cached_oop, address entry) { | |
177 assert(!SafepointSynchronize::is_at_safepoint(), "should not be called during a safepoint"); | |
178 assert (CompiledIC_lock->is_locked(), ""); | |
179 assert(cached_oop == NULL || cached_oop->is_perm(), "must belong to perm. space"); | |
180 if (TraceICBuffer) { tty->print_cr(" create transition stub for " INTPTR_FORMAT, ic->instruction_address()); } | |
181 | |
182 // If an transition stub is already associate with the inline cache, then we remove the association. | |
183 if (ic->is_in_transition_state()) { | |
184 ICStub* old_stub = ICStub_from_destination_address(ic->stub_address()); | |
185 old_stub->clear(); | |
186 } | |
187 | |
188 // allocate and initialize new "out-of-line" inline-cache | |
189 ICStub* ic_stub = get_next_stub(); | |
190 ic_stub->set_stub(ic, cached_oop, entry); | |
191 | |
192 // Update inline cache in nmethod to point to new "out-of-line" allocated inline cache | |
193 ic->set_ic_destination(ic_stub->code_begin()); | |
194 | |
195 set_next_stub(new_ic_stub()); // can cause safepoint synchronization | |
196 } | |
197 | |
198 | |
199 address InlineCacheBuffer::ic_destination_for(CompiledIC *ic) { | |
200 ICStub* stub = ICStub_from_destination_address(ic->stub_address()); | |
201 return stub->destination(); | |
202 } | |
203 | |
204 | |
205 oop InlineCacheBuffer::cached_oop_for(CompiledIC *ic) { | |
206 ICStub* stub = ICStub_from_destination_address(ic->stub_address()); | |
207 return stub->cached_oop(); | |
208 } |