Mercurial > hg > graal-compiler
annotate src/share/vm/code/icBuffer.cpp @ 15046:5c71dcf0915d
use hotspot static stubs for call sites
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Wed, 09 Apr 2014 16:33:37 -0700 |
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children | 52b4284cb496 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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 * | |
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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" |
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26 #include "code/codeCache.hpp" |
1972 | 27 #include "code/compiledIC.hpp" |
28 #include "code/icBuffer.hpp" | |
29 #include "code/nmethod.hpp" | |
30 #include "code/scopeDesc.hpp" | |
31 #include "gc_interface/collectedHeap.inline.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/linkResolver.hpp" | |
34 #include "memory/resourceArea.hpp" | |
35 #include "memory/universe.inline.hpp" | |
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36 #include "oops/method.hpp" |
1972 | 37 #include "oops/oop.inline.hpp" |
38 #include "oops/oop.inline2.hpp" | |
39 #include "runtime/mutexLocker.hpp" | |
40 #include "runtime/stubRoutines.hpp" | |
0 | 41 |
42 | |
43 DEF_STUB_INTERFACE(ICStub); | |
44 | |
45 StubQueue* InlineCacheBuffer::_buffer = NULL; | |
46 ICStub* InlineCacheBuffer::_next_stub = NULL; | |
47 | |
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48 CompiledICHolder* InlineCacheBuffer::_pending_released = NULL; |
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49 int InlineCacheBuffer::_pending_count = 0; |
0 | 50 |
51 void ICStub::finalize() { | |
52 if (!is_empty()) { | |
53 ResourceMark rm; | |
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54 CompiledIC *ic = CompiledIC_at(CodeCache::find_nmethod(ic_site()), ic_site()); |
0 | 55 assert(CodeCache::find_nmethod(ic->instruction_address()) != NULL, "inline cache in non-nmethod?"); |
56 | |
57 assert(this == ICStub_from_destination_address(ic->stub_address()), "wrong owner of ic buffer"); | |
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58 ic->set_ic_destination_and_value(destination(), cached_value()); |
0 | 59 } |
60 } | |
61 | |
62 | |
63 address ICStub::destination() const { | |
64 return InlineCacheBuffer::ic_buffer_entry_point(code_begin()); | |
65 } | |
66 | |
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67 void* ICStub::cached_value() const { |
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68 return InlineCacheBuffer::ic_buffer_cached_value(code_begin()); |
0 | 69 } |
70 | |
71 | |
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72 void ICStub::set_stub(CompiledIC *ic, void* cached_val, address dest_addr) { |
0 | 73 // We cannot store a pointer to the 'ic' object, since it is resource allocated. Instead we |
74 // store the location of the inline cache. Then we have enough information recreate the CompiledIC | |
75 // object when we need to remove the stub. | |
76 _ic_site = ic->instruction_address(); | |
77 | |
78 // Assemble new stub | |
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79 InlineCacheBuffer::assemble_ic_buffer_code(code_begin(), cached_val, dest_addr); |
0 | 80 assert(destination() == dest_addr, "can recover destination"); |
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81 assert(cached_value() == cached_val, "can recover destination"); |
0 | 82 } |
83 | |
84 | |
85 void ICStub::clear() { | |
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86 if (CompiledIC::is_icholder_entry(destination())) { |
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87 InlineCacheBuffer::queue_for_release((CompiledICHolder*)cached_value()); |
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88 } |
0 | 89 _ic_site = NULL; |
90 } | |
91 | |
92 | |
93 #ifndef PRODUCT | |
94 // anybody calling to this stub will trap | |
95 | |
96 void ICStub::verify() { | |
97 } | |
98 | |
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99 void ICStub::print() { |
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100 tty->print_cr("ICStub: site: " INTPTR_FORMAT, _ic_site); |
0 | 101 } |
102 #endif | |
103 | |
104 //----------------------------------------------------------------------------------------------- | |
105 // Implementation of InlineCacheBuffer | |
106 | |
107 void InlineCacheBuffer::init_next_stub() { | |
108 ICStub* ic_stub = (ICStub*)buffer()->request_committed (ic_stub_code_size()); | |
109 assert (ic_stub != NULL, "no room for a single stub"); | |
110 set_next_stub(ic_stub); | |
111 } | |
112 | |
113 void InlineCacheBuffer::initialize() { | |
114 if (_buffer != NULL) return; // already initialized | |
115 _buffer = new StubQueue(new ICStubInterface, 10*K, InlineCacheBuffer_lock, "InlineCacheBuffer"); | |
116 assert (_buffer != NULL, "cannot allocate InlineCacheBuffer"); | |
117 init_next_stub(); | |
118 } | |
119 | |
120 | |
121 ICStub* InlineCacheBuffer::new_ic_stub() { | |
122 while (true) { | |
123 ICStub* ic_stub = (ICStub*)buffer()->request_committed(ic_stub_code_size()); | |
124 if (ic_stub != NULL) { | |
125 return ic_stub; | |
126 } | |
127 // we ran out of inline cache buffer space; must enter safepoint. | |
128 // We do this by forcing a safepoint | |
129 EXCEPTION_MARK; | |
130 | |
131 VM_ForceSafepoint vfs; | |
132 VMThread::execute(&vfs); | |
133 // We could potential get an async. exception at this point. | |
134 // In that case we will rethrow it to ourselvs. | |
135 if (HAS_PENDING_EXCEPTION) { | |
136 oop exception = PENDING_EXCEPTION; | |
137 CLEAR_PENDING_EXCEPTION; | |
138 Thread::send_async_exception(JavaThread::current()->threadObj(), exception); | |
139 } | |
140 } | |
141 ShouldNotReachHere(); | |
142 return NULL; | |
143 } | |
144 | |
145 | |
146 void InlineCacheBuffer::update_inline_caches() { | |
147 if (buffer()->number_of_stubs() > 1) { | |
148 if (TraceICBuffer) { | |
149 tty->print_cr("[updating inline caches with %d stubs]", buffer()->number_of_stubs()); | |
150 } | |
151 buffer()->remove_all(); | |
152 init_next_stub(); | |
153 } | |
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154 release_pending_icholders(); |
0 | 155 } |
156 | |
157 | |
158 bool InlineCacheBuffer::contains(address instruction_address) { | |
159 return buffer()->contains(instruction_address); | |
160 } | |
161 | |
162 | |
163 bool InlineCacheBuffer::is_empty() { | |
164 return buffer()->number_of_stubs() == 1; // always has sentinel | |
165 } | |
166 | |
167 | |
168 void InlineCacheBuffer_init() { | |
169 InlineCacheBuffer::initialize(); | |
170 } | |
171 | |
172 | |
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173 void InlineCacheBuffer::create_transition_stub(CompiledIC *ic, void* cached_value, address entry) { |
0 | 174 assert(!SafepointSynchronize::is_at_safepoint(), "should not be called during a safepoint"); |
175 assert (CompiledIC_lock->is_locked(), ""); | |
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176 if (TraceICBuffer) { |
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177 tty->print_cr(" create transition stub for " INTPTR_FORMAT " destination " INTPTR_FORMAT " cached value " INTPTR_FORMAT, |
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178 ic->instruction_address(), entry, cached_value); |
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179 } |
0 | 180 |
181 // If an transition stub is already associate with the inline cache, then we remove the association. | |
182 if (ic->is_in_transition_state()) { | |
183 ICStub* old_stub = ICStub_from_destination_address(ic->stub_address()); | |
184 old_stub->clear(); | |
185 } | |
186 | |
187 // allocate and initialize new "out-of-line" inline-cache | |
188 ICStub* ic_stub = get_next_stub(); | |
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189 ic_stub->set_stub(ic, cached_value, entry); |
0 | 190 |
191 // Update inline cache in nmethod to point to new "out-of-line" allocated inline cache | |
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192 ic->set_ic_destination(ic_stub); |
0 | 193 |
194 set_next_stub(new_ic_stub()); // can cause safepoint synchronization | |
195 } | |
196 | |
197 | |
198 address InlineCacheBuffer::ic_destination_for(CompiledIC *ic) { | |
199 ICStub* stub = ICStub_from_destination_address(ic->stub_address()); | |
200 return stub->destination(); | |
201 } | |
202 | |
203 | |
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204 void* InlineCacheBuffer::cached_value_for(CompiledIC *ic) { |
0 | 205 ICStub* stub = ICStub_from_destination_address(ic->stub_address()); |
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206 return stub->cached_value(); |
0 | 207 } |
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208 |
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209 |
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210 // Free CompiledICHolder*s that are no longer in use |
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211 void InlineCacheBuffer::release_pending_icholders() { |
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212 assert(SafepointSynchronize::is_at_safepoint(), "should only be called during a safepoint"); |
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213 CompiledICHolder* holder = _pending_released; |
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214 _pending_released = NULL; |
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215 while (holder != NULL) { |
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216 CompiledICHolder* next = holder->next(); |
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217 delete holder; |
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218 holder = next; |
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219 _pending_count--; |
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220 } |
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221 assert(_pending_count == 0, "wrong count"); |
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222 } |
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223 |
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224 // Enqueue this icholder for release during the next safepoint. It's |
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225 // not safe to free them until them since they might be visible to |
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226 // another thread. |
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227 void InlineCacheBuffer::queue_for_release(CompiledICHolder* icholder) { |
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228 MutexLockerEx mex(InlineCacheBuffer_lock); |
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229 icholder->set_next(_pending_released); |
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230 _pending_released = icholder; |
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231 _pending_count++; |
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232 if (TraceICBuffer) { |
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233 tty->print_cr("enqueueing icholder " INTPTR_FORMAT " to be freed", icholder); |
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234 } |
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235 } |