Mercurial > hg > graal-compiler
annotate src/share/vm/code/icBuffer.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | 1d1603768966 |
| children | 7d815d842ee0 cd3d6a6b95d9 |
| rev | line source |
|---|---|
| 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" |
| 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" | |
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35 #include "oops/method.hpp" |
| 1972 | 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 | |
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49 #ifdef TARGET_ARCH_arm |
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50 # include "assembler_arm.inline.hpp" |
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51 #endif |
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52 #ifdef TARGET_ARCH_ppc |
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53 # include "assembler_ppc.inline.hpp" |
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54 #endif |
| 0 | 55 |
| 56 | |
| 57 DEF_STUB_INTERFACE(ICStub); | |
| 58 | |
| 59 StubQueue* InlineCacheBuffer::_buffer = NULL; | |
| 60 ICStub* InlineCacheBuffer::_next_stub = NULL; | |
| 61 | |
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62 CompiledICHolder* InlineCacheBuffer::_pending_released = NULL; |
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63 int InlineCacheBuffer::_pending_count = 0; |
| 0 | 64 |
| 65 void ICStub::finalize() { | |
| 66 if (!is_empty()) { | |
| 67 ResourceMark rm; | |
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68 CompiledIC *ic = CompiledIC_at(CodeCache::find_nmethod(ic_site()), ic_site()); |
| 0 | 69 assert(CodeCache::find_nmethod(ic->instruction_address()) != NULL, "inline cache in non-nmethod?"); |
| 70 | |
| 71 assert(this == ICStub_from_destination_address(ic->stub_address()), "wrong owner of ic buffer"); | |
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72 ic->set_ic_destination_and_value(destination(), cached_value()); |
| 0 | 73 } |
| 74 } | |
| 75 | |
| 76 | |
| 77 address ICStub::destination() const { | |
| 78 return InlineCacheBuffer::ic_buffer_entry_point(code_begin()); | |
| 79 } | |
| 80 | |
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81 void* ICStub::cached_value() const { |
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82 return InlineCacheBuffer::ic_buffer_cached_value(code_begin()); |
| 0 | 83 } |
| 84 | |
| 85 | |
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86 void ICStub::set_stub(CompiledIC *ic, void* cached_val, address dest_addr) { |
| 0 | 87 // We cannot store a pointer to the 'ic' object, since it is resource allocated. Instead we |
| 88 // store the location of the inline cache. Then we have enough information recreate the CompiledIC | |
| 89 // object when we need to remove the stub. | |
| 90 _ic_site = ic->instruction_address(); | |
| 91 | |
| 92 // Assemble new stub | |
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93 InlineCacheBuffer::assemble_ic_buffer_code(code_begin(), cached_val, dest_addr); |
| 0 | 94 assert(destination() == dest_addr, "can recover destination"); |
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95 assert(cached_value() == cached_val, "can recover destination"); |
| 0 | 96 } |
| 97 | |
| 98 | |
| 99 void ICStub::clear() { | |
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100 if (CompiledIC::is_icholder_entry(destination())) { |
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101 InlineCacheBuffer::queue_for_release((CompiledICHolder*)cached_value()); |
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102 } |
| 0 | 103 _ic_site = NULL; |
| 104 } | |
| 105 | |
| 106 | |
| 107 #ifndef PRODUCT | |
| 108 // anybody calling to this stub will trap | |
| 109 | |
| 110 void ICStub::verify() { | |
| 111 } | |
| 112 | |
| 113 void ICStub::print() { | |
| 114 tty->print_cr("ICStub: site: " INTPTR_FORMAT, _ic_site); | |
| 115 } | |
| 116 #endif | |
| 117 | |
| 118 //----------------------------------------------------------------------------------------------- | |
| 119 // Implementation of InlineCacheBuffer | |
| 120 | |
| 121 void InlineCacheBuffer::init_next_stub() { | |
| 122 ICStub* ic_stub = (ICStub*)buffer()->request_committed (ic_stub_code_size()); | |
| 123 assert (ic_stub != NULL, "no room for a single stub"); | |
| 124 set_next_stub(ic_stub); | |
| 125 } | |
| 126 | |
| 127 void InlineCacheBuffer::initialize() { | |
| 128 if (_buffer != NULL) return; // already initialized | |
| 129 _buffer = new StubQueue(new ICStubInterface, 10*K, InlineCacheBuffer_lock, "InlineCacheBuffer"); | |
| 130 assert (_buffer != NULL, "cannot allocate InlineCacheBuffer"); | |
| 131 init_next_stub(); | |
| 132 } | |
| 133 | |
| 134 | |
| 135 ICStub* InlineCacheBuffer::new_ic_stub() { | |
| 136 while (true) { | |
| 137 ICStub* ic_stub = (ICStub*)buffer()->request_committed(ic_stub_code_size()); | |
| 138 if (ic_stub != NULL) { | |
| 139 return ic_stub; | |
| 140 } | |
| 141 // we ran out of inline cache buffer space; must enter safepoint. | |
| 142 // We do this by forcing a safepoint | |
| 143 EXCEPTION_MARK; | |
| 144 | |
| 145 VM_ForceSafepoint vfs; | |
| 146 VMThread::execute(&vfs); | |
| 147 // We could potential get an async. exception at this point. | |
| 148 // In that case we will rethrow it to ourselvs. | |
| 149 if (HAS_PENDING_EXCEPTION) { | |
| 150 oop exception = PENDING_EXCEPTION; | |
| 151 CLEAR_PENDING_EXCEPTION; | |
| 152 Thread::send_async_exception(JavaThread::current()->threadObj(), exception); | |
| 153 } | |
| 154 } | |
| 155 ShouldNotReachHere(); | |
| 156 return NULL; | |
| 157 } | |
| 158 | |
| 159 | |
| 160 void InlineCacheBuffer::update_inline_caches() { | |
| 161 if (buffer()->number_of_stubs() > 1) { | |
| 162 if (TraceICBuffer) { | |
| 163 tty->print_cr("[updating inline caches with %d stubs]", buffer()->number_of_stubs()); | |
| 164 } | |
| 165 buffer()->remove_all(); | |
| 166 init_next_stub(); | |
| 167 } | |
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168 release_pending_icholders(); |
| 0 | 169 } |
| 170 | |
| 171 | |
| 172 bool InlineCacheBuffer::contains(address instruction_address) { | |
| 173 return buffer()->contains(instruction_address); | |
| 174 } | |
| 175 | |
| 176 | |
| 177 bool InlineCacheBuffer::is_empty() { | |
| 178 return buffer()->number_of_stubs() == 1; // always has sentinel | |
| 179 } | |
| 180 | |
| 181 | |
| 182 void InlineCacheBuffer_init() { | |
| 183 InlineCacheBuffer::initialize(); | |
| 184 } | |
| 185 | |
| 186 | |
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187 void InlineCacheBuffer::create_transition_stub(CompiledIC *ic, void* cached_value, address entry) { |
| 0 | 188 assert(!SafepointSynchronize::is_at_safepoint(), "should not be called during a safepoint"); |
| 189 assert (CompiledIC_lock->is_locked(), ""); | |
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190 if (TraceICBuffer) { |
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191 tty->print_cr(" create transition stub for " INTPTR_FORMAT " destination " INTPTR_FORMAT " cached value " INTPTR_FORMAT, |
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192 ic->instruction_address(), entry, cached_value); |
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193 } |
| 0 | 194 |
| 195 // If an transition stub is already associate with the inline cache, then we remove the association. | |
| 196 if (ic->is_in_transition_state()) { | |
| 197 ICStub* old_stub = ICStub_from_destination_address(ic->stub_address()); | |
| 198 old_stub->clear(); | |
| 199 } | |
| 200 | |
| 201 // allocate and initialize new "out-of-line" inline-cache | |
| 202 ICStub* ic_stub = get_next_stub(); | |
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203 ic_stub->set_stub(ic, cached_value, entry); |
| 0 | 204 |
| 205 // Update inline cache in nmethod to point to new "out-of-line" allocated inline cache | |
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206 ic->set_ic_destination(ic_stub); |
| 0 | 207 |
| 208 set_next_stub(new_ic_stub()); // can cause safepoint synchronization | |
| 209 } | |
| 210 | |
| 211 | |
| 212 address InlineCacheBuffer::ic_destination_for(CompiledIC *ic) { | |
| 213 ICStub* stub = ICStub_from_destination_address(ic->stub_address()); | |
| 214 return stub->destination(); | |
| 215 } | |
| 216 | |
| 217 | |
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218 void* InlineCacheBuffer::cached_value_for(CompiledIC *ic) { |
| 0 | 219 ICStub* stub = ICStub_from_destination_address(ic->stub_address()); |
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220 return stub->cached_value(); |
| 0 | 221 } |
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222 |
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223 |
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224 // Free CompiledICHolder*s that are no longer in use |
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225 void InlineCacheBuffer::release_pending_icholders() { |
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226 assert(SafepointSynchronize::is_at_safepoint(), "should only be called during a safepoint"); |
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227 CompiledICHolder* holder = _pending_released; |
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228 _pending_released = NULL; |
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229 while (holder != NULL) { |
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230 CompiledICHolder* next = holder->next(); |
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231 delete holder; |
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232 holder = next; |
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233 _pending_count--; |
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234 } |
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235 assert(_pending_count == 0, "wrong count"); |
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236 } |
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237 |
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238 // Enqueue this icholder for release during the next safepoint. It's |
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239 // not safe to free them until them since they might be visible to |
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240 // another thread. |
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241 void InlineCacheBuffer::queue_for_release(CompiledICHolder* icholder) { |
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242 MutexLockerEx mex(InlineCacheBuffer_lock); |
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243 icholder->set_next(_pending_released); |
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244 _pending_released = icholder; |
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245 _pending_count++; |
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246 if (TraceICBuffer) { |
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247 tty->print_cr("enqueueing icholder " INTPTR_FORMAT " to be freed", icholder); |
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248 } |
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249 } |