Mercurial > hg > truffle
annotate src/share/vm/code/compiledIC.cpp @ 16934:fc33fd65fbe5
[SPARC] new Unittests for IntegerBits, Switch (with byte, short, char values) and high float register pressure, sign extending short from heap
author | Stefan Anzinger <stefan.anzinger@gmail.com> |
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date | Mon, 25 Aug 2014 10:24:08 -0700 |
parents | 9f7eac122d61 |
children | 52b4284cb496 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, 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 "classfile/systemDictionary.hpp" | |
27 #include "code/codeCache.hpp" | |
28 #include "code/compiledIC.hpp" | |
29 #include "code/icBuffer.hpp" | |
30 #include "code/nmethod.hpp" | |
31 #include "code/vtableStubs.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/linkResolver.hpp" | |
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34 #include "memory/metadataFactory.hpp" |
1972 | 35 #include "memory/oopFactory.hpp" |
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36 #include "oops/method.hpp" |
1972 | 37 #include "oops/oop.inline.hpp" |
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38 #include "oops/symbol.hpp" |
1972 | 39 #include "runtime/icache.hpp" |
40 #include "runtime/sharedRuntime.hpp" | |
41 #include "runtime/stubRoutines.hpp" | |
42 #include "utilities/events.hpp" | |
0 | 43 |
44 | |
45 // Every time a compiled IC is changed or its type is being accessed, | |
46 // either the CompiledIC_lock must be set or we must be at a safe point. | |
47 | |
48 //----------------------------------------------------------------------------- | |
49 // Low-level access to an inline cache. Private, since they might not be | |
50 // MT-safe to use. | |
51 | |
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52 void* CompiledIC::cached_value() const { |
0 | 53 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
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54 assert (!is_optimized(), "an optimized virtual call does not have a cached metadata"); |
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55 |
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56 if (!is_in_transition_state()) { |
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57 void* data = (void*)_value->data(); |
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58 // If we let the metadata value here be initialized to zero... |
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59 assert(data != NULL || Universe::non_oop_word() == NULL, |
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60 "no raw nulls in CompiledIC metadatas, because of patching races"); |
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61 return (data == (void*)Universe::non_oop_word()) ? NULL : data; |
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62 } else { |
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63 return InlineCacheBuffer::cached_value_for((CompiledIC *)this); |
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64 } |
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65 } |
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66 |
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67 |
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68 void CompiledIC::internal_set_ic_destination(address entry_point, bool is_icstub, void* cache, bool is_icholder) { |
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69 assert(entry_point != NULL, "must set legal entry point"); |
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70 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
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71 assert (!is_optimized() || cache == NULL, "an optimized virtual call does not have a cached metadata"); |
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72 assert (cache == NULL || cache != (Metadata*)badOopVal, "invalid metadata"); |
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73 |
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74 assert(!is_icholder || is_icholder_entry(entry_point), "must be"); |
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75 |
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76 // Don't use ic_destination for this test since that forwards |
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77 // through ICBuffer instead of returning the actual current state of |
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78 // the CompiledIC. |
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79 if (is_icholder_entry(_ic_call->destination())) { |
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80 // When patching for the ICStub case the cached value isn't |
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81 // overwritten until the ICStub copied into the CompiledIC during |
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82 // the next safepoint. Make sure that the CompiledICHolder* is |
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83 // marked for release at this point since it won't be identifiable |
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84 // once the entry point is overwritten. |
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85 InlineCacheBuffer::queue_for_release((CompiledICHolder*)_value->data()); |
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86 } |
0 | 87 |
88 if (TraceCompiledIC) { | |
89 tty->print(" "); | |
90 print_compiled_ic(); | |
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91 tty->print(" changing destination to " INTPTR_FORMAT, entry_point); |
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92 if (!is_optimized()) { |
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93 tty->print(" changing cached %s to " INTPTR_FORMAT, is_icholder ? "icholder" : "metadata", (address)cache); |
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94 } |
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95 if (is_icstub) { |
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96 tty->print(" (icstub)"); |
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97 } |
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98 tty->cr(); |
0 | 99 } |
100 | |
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101 { |
0 | 102 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); |
103 #ifdef ASSERT | |
104 CodeBlob* cb = CodeCache::find_blob_unsafe(_ic_call); | |
105 assert(cb != NULL && cb->is_nmethod(), "must be nmethod"); | |
106 #endif | |
107 _ic_call->set_destination_mt_safe(entry_point); | |
108 } | |
109 | |
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110 if (is_optimized() || is_icstub) { |
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111 // Optimized call sites don't have a cache value and ICStub call |
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112 // sites only change the entry point. Changing the value in that |
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113 // case could lead to MT safety issues. |
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114 assert(cache == NULL, "must be null"); |
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115 return; |
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116 } |
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117 |
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118 if (cache == NULL) cache = (void*)Universe::non_oop_word(); |
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119 |
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120 _value->set_data((intptr_t)cache); |
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121 } |
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122 |
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123 |
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124 void CompiledIC::set_ic_destination(ICStub* stub) { |
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125 internal_set_ic_destination(stub->code_begin(), true, NULL, false); |
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126 } |
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127 |
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128 |
0 | 129 |
130 address CompiledIC::ic_destination() const { | |
131 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); | |
132 if (!is_in_transition_state()) { | |
133 return _ic_call->destination(); | |
134 } else { | |
135 return InlineCacheBuffer::ic_destination_for((CompiledIC *)this); | |
136 } | |
137 } | |
138 | |
139 | |
140 bool CompiledIC::is_in_transition_state() const { | |
141 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); | |
142 return InlineCacheBuffer::contains(_ic_call->destination()); | |
143 } | |
144 | |
145 | |
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146 bool CompiledIC::is_icholder_call() const { |
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147 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
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148 return !_is_optimized && is_icholder_entry(ic_destination()); |
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149 } |
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150 |
0 | 151 // Returns native address of 'call' instruction in inline-cache. Used by |
152 // the InlineCacheBuffer when it needs to find the stub. | |
153 address CompiledIC::stub_address() const { | |
154 assert(is_in_transition_state(), "should only be called when we are in a transition state"); | |
155 return _ic_call->destination(); | |
156 } | |
157 | |
158 | |
159 //----------------------------------------------------------------------------- | |
160 // High-level access to an inline cache. Guaranteed to be MT-safe. | |
161 | |
162 | |
12294 | 163 bool CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) { |
0 | 164 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
165 assert(!is_optimized(), "cannot set an optimized virtual call to megamorphic"); | |
166 assert(is_call_to_compiled() || is_call_to_interpreted(), "going directly to megamorphic?"); | |
167 | |
168 address entry; | |
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169 if (call_info->call_kind() == CallInfo::itable_call) { |
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170 assert(bytecode == Bytecodes::_invokeinterface, ""); |
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171 int itable_index = call_info->itable_index(); |
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172 entry = VtableStubs::find_itable_stub(itable_index); |
12294 | 173 if (entry == false) { |
174 return false; | |
175 } | |
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176 #ifdef ASSERT |
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177 int index = call_info->resolved_method()->itable_index(); |
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178 assert(index == itable_index, "CallInfo pre-computes this"); |
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179 #endif //ASSERT |
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180 InstanceKlass* k = call_info->resolved_method()->method_holder(); |
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181 assert(k->verify_itable_index(itable_index), "sanity check"); |
0 | 182 InlineCacheBuffer::create_transition_stub(this, k, entry); |
183 } else { | |
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184 assert(call_info->call_kind() == CallInfo::vtable_call, "either itable or vtable"); |
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185 // Can be different than selected_method->vtable_index(), due to package-private etc. |
0 | 186 int vtable_index = call_info->vtable_index(); |
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187 assert(call_info->resolved_klass()->verify_vtable_index(vtable_index), "sanity check"); |
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188 entry = VtableStubs::find_vtable_stub(vtable_index); |
12294 | 189 if (entry == NULL) { |
190 return false; | |
191 } | |
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192 InlineCacheBuffer::create_transition_stub(this, NULL, entry); |
0 | 193 } |
194 | |
195 if (TraceICs) { | |
196 ResourceMark rm; | |
197 tty->print_cr ("IC@" INTPTR_FORMAT ": to megamorphic %s entry: " INTPTR_FORMAT, | |
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198 instruction_address(), call_info->selected_method()->print_value_string(), entry); |
0 | 199 } |
200 | |
201 // We can't check this anymore. With lazy deopt we could have already | |
202 // cleaned this IC entry before we even return. This is possible if | |
203 // we ran out of space in the inline cache buffer trying to do the | |
204 // set_next and we safepointed to free up space. This is a benign | |
205 // race because the IC entry was complete when we safepointed so | |
206 // cleaning it immediately is harmless. | |
207 // assert(is_megamorphic(), "sanity check"); | |
12294 | 208 return true; |
0 | 209 } |
210 | |
211 | |
212 // true if destination is megamorphic stub | |
213 bool CompiledIC::is_megamorphic() const { | |
214 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); | |
215 assert(!is_optimized(), "an optimized call cannot be megamorphic"); | |
216 | |
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217 // Cannot rely on cached_value. It is either an interface or a method. |
0 | 218 return VtableStubs::is_entry_point(ic_destination()); |
219 } | |
220 | |
221 bool CompiledIC::is_call_to_compiled() const { | |
222 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); | |
223 | |
224 // Use unsafe, since an inline cache might point to a zombie method. However, the zombie | |
225 // method is guaranteed to still exist, since we only remove methods after all inline caches | |
226 // has been cleaned up | |
227 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination()); | |
228 bool is_monomorphic = (cb != NULL && cb->is_nmethod()); | |
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229 // Check that the cached_value is a klass for non-optimized monomorphic calls |
0 | 230 // This assertion is invalid for compiler1: a call that does not look optimized (no static stub) can be used |
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231 // for calling directly to vep without using the inline cache (i.e., cached_value == NULL). |
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232 // For Graal this occurs because CHA is only used to improve inlining so call sites which could be optimized |
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233 // virtuals because there are no currently loaded subclasses of a type are left as virtual call sites. |
0 | 234 #ifdef ASSERT |
235 CodeBlob* caller = CodeCache::find_blob_unsafe(instruction_address()); | |
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236 bool is_c1_or_graal_method = caller->is_compiled_by_c1() || caller->is_compiled_by_graal(); |
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237 assert( is_c1_or_graal_method || |
0 | 238 !is_monomorphic || |
239 is_optimized() || | |
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240 (cached_metadata() != NULL && cached_metadata()->is_klass()), "sanity check"); |
0 | 241 #endif // ASSERT |
242 return is_monomorphic; | |
243 } | |
244 | |
245 | |
246 bool CompiledIC::is_call_to_interpreted() const { | |
247 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); | |
248 // Call to interpreter if destination is either calling to a stub (if it | |
249 // is optimized), or calling to an I2C blob | |
250 bool is_call_to_interpreted = false; | |
251 if (!is_optimized()) { | |
252 // must use unsafe because the destination can be a zombie (and we're cleaning) | |
253 // and the print_compiled_ic code wants to know if site (in the non-zombie) | |
254 // is to the interpreter. | |
255 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination()); | |
256 is_call_to_interpreted = (cb != NULL && cb->is_adapter_blob()); | |
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257 assert(!is_call_to_interpreted || (is_icholder_call() && cached_icholder() != NULL), "sanity check"); |
0 | 258 } else { |
259 // Check if we are calling into our own codeblob (i.e., to a stub) | |
260 CodeBlob* cb = CodeCache::find_blob(_ic_call->instruction_address()); | |
261 address dest = ic_destination(); | |
262 #ifdef ASSERT | |
263 { | |
264 CodeBlob* db = CodeCache::find_blob_unsafe(dest); | |
265 assert(!db->is_adapter_blob(), "must use stub!"); | |
266 } | |
267 #endif /* ASSERT */ | |
268 is_call_to_interpreted = cb->contains(dest); | |
269 } | |
270 return is_call_to_interpreted; | |
271 } | |
272 | |
273 | |
274 void CompiledIC::set_to_clean() { | |
275 assert(SafepointSynchronize::is_at_safepoint() || CompiledIC_lock->is_locked() , "MT-unsafe call"); | |
276 if (TraceInlineCacheClearing || TraceICs) { | |
277 tty->print_cr("IC@" INTPTR_FORMAT ": set to clean", instruction_address()); | |
278 print(); | |
279 } | |
280 | |
281 address entry; | |
282 if (is_optimized()) { | |
283 entry = SharedRuntime::get_resolve_opt_virtual_call_stub(); | |
284 } else { | |
285 entry = SharedRuntime::get_resolve_virtual_call_stub(); | |
286 } | |
287 | |
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288 // A zombie transition will always be safe, since the metadata has already been set to NULL, so |
0 | 289 // we only need to patch the destination |
290 bool safe_transition = is_optimized() || SafepointSynchronize::is_at_safepoint(); | |
291 | |
292 if (safe_transition) { | |
293 // Kill any leftover stub we might have too | |
294 if (is_in_transition_state()) { | |
295 ICStub* old_stub = ICStub_from_destination_address(stub_address()); | |
296 old_stub->clear(); | |
297 } | |
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298 if (is_optimized()) { |
0 | 299 set_ic_destination(entry); |
300 } else { | |
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301 set_ic_destination_and_value(entry, (void*)NULL); |
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302 } |
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303 } else { |
0 | 304 // Unsafe transition - create stub. |
305 InlineCacheBuffer::create_transition_stub(this, NULL, entry); | |
306 } | |
307 // We can't check this anymore. With lazy deopt we could have already | |
308 // cleaned this IC entry before we even return. This is possible if | |
309 // we ran out of space in the inline cache buffer trying to do the | |
310 // set_next and we safepointed to free up space. This is a benign | |
311 // race because the IC entry was complete when we safepointed so | |
312 // cleaning it immediately is harmless. | |
313 // assert(is_clean(), "sanity check"); | |
314 } | |
315 | |
316 | |
317 bool CompiledIC::is_clean() const { | |
318 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); | |
319 bool is_clean = false; | |
320 address dest = ic_destination(); | |
321 is_clean = dest == SharedRuntime::get_resolve_opt_virtual_call_stub() || | |
322 dest == SharedRuntime::get_resolve_virtual_call_stub(); | |
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323 assert(!is_clean || is_optimized() || cached_value() == NULL, "sanity check"); |
0 | 324 return is_clean; |
325 } | |
326 | |
327 | |
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328 void CompiledIC::set_to_monomorphic(CompiledICInfo& info) { |
0 | 329 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
330 // Updating a cache to the wrong entry can cause bugs that are very hard | |
331 // to track down - if cache entry gets invalid - we just clean it. In | |
332 // this way it is always the same code path that is responsible for | |
333 // updating and resolving an inline cache | |
334 // | |
335 // The above is no longer true. SharedRuntime::fixup_callers_callsite will change optimized | |
336 // callsites. In addition ic_miss code will update a site to monomorphic if it determines | |
337 // that an monomorphic call to the interpreter can now be monomorphic to compiled code. | |
338 // | |
339 // In both of these cases the only thing being modifed is the jump/call target and these | |
340 // transitions are mt_safe | |
341 | |
342 Thread *thread = Thread::current(); | |
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343 if (info.to_interpreter()) { |
0 | 344 // Call to interpreter |
345 if (info.is_optimized() && is_optimized()) { | |
346 assert(is_clean(), "unsafe IC path"); | |
347 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
348 // the call analysis (callee structure) specifies that the call is optimized | |
349 // (either because of CHA or the static target is final) | |
350 // At code generation time, this call has been emitted as static call | |
351 // Call via stub | |
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352 assert(info.cached_metadata() != NULL && info.cached_metadata()->is_method(), "sanity check"); |
0 | 353 CompiledStaticCall* csc = compiledStaticCall_at(instruction_address()); |
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354 methodHandle method (thread, (Method*)info.cached_metadata()); |
0 | 355 csc->set_to_interpreted(method, info.entry()); |
356 if (TraceICs) { | |
357 ResourceMark rm(thread); | |
358 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter: %s", | |
359 instruction_address(), | |
360 method->print_value_string()); | |
361 } | |
362 } else { | |
363 // Call via method-klass-holder | |
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364 InlineCacheBuffer::create_transition_stub(this, info.claim_cached_icholder(), info.entry()); |
0 | 365 if (TraceICs) { |
366 ResourceMark rm(thread); | |
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367 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via icholder ", instruction_address()); |
0 | 368 } |
369 } | |
370 } else { | |
371 // Call to compiled code | |
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372 bool static_bound = info.is_optimized() || (info.cached_metadata() == NULL); |
0 | 373 #ifdef ASSERT |
374 CodeBlob* cb = CodeCache::find_blob_unsafe(info.entry()); | |
375 assert (cb->is_nmethod(), "must be compiled!"); | |
376 #endif /* ASSERT */ | |
377 | |
378 // This is MT safe if we come from a clean-cache and go through a | |
379 // non-verified entry point | |
380 bool safe = SafepointSynchronize::is_at_safepoint() || | |
381 (!is_in_transition_state() && (info.is_optimized() || static_bound || is_clean())); | |
382 | |
383 if (!safe) { | |
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384 InlineCacheBuffer::create_transition_stub(this, info.cached_metadata(), info.entry()); |
0 | 385 } else { |
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386 if (is_optimized()) { |
0 | 387 set_ic_destination(info.entry()); |
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388 } else { |
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389 set_ic_destination_and_value(info.entry(), info.cached_metadata()); |
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390 } |
0 | 391 } |
392 | |
393 if (TraceICs) { | |
394 ResourceMark rm(thread); | |
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395 assert(info.cached_metadata() == NULL || info.cached_metadata()->is_klass(), "must be"); |
0 | 396 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to compiled (rcvr klass) %s: %s", |
397 instruction_address(), | |
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398 ((Klass*)info.cached_metadata())->print_value_string(), |
0 | 399 (safe) ? "" : "via stub"); |
400 } | |
401 } | |
402 // We can't check this anymore. With lazy deopt we could have already | |
403 // cleaned this IC entry before we even return. This is possible if | |
404 // we ran out of space in the inline cache buffer trying to do the | |
405 // set_next and we safepointed to free up space. This is a benign | |
406 // race because the IC entry was complete when we safepointed so | |
407 // cleaning it immediately is harmless. | |
408 // assert(is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); | |
409 } | |
410 | |
411 | |
412 // is_optimized: Compiler has generated an optimized call (i.e., no inline | |
413 // cache) static_bound: The call can be static bound (i.e, no need to use | |
414 // inline cache) | |
415 void CompiledIC::compute_monomorphic_entry(methodHandle method, | |
416 KlassHandle receiver_klass, | |
417 bool is_optimized, | |
418 bool static_bound, | |
419 CompiledICInfo& info, | |
420 TRAPS) { | |
421 nmethod* method_code = method->code(); | |
422 address entry = NULL; | |
13441 | 423 if (method_code != NULL && method_code->is_in_use()) { |
0 | 424 // Call to compiled code |
425 if (static_bound || is_optimized) { | |
426 entry = method_code->verified_entry_point(); | |
427 } else { | |
428 entry = method_code->entry_point(); | |
429 } | |
430 } | |
431 if (entry != NULL) { | |
432 // Call to compiled code | |
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433 info.set_compiled_entry(entry, (static_bound || is_optimized) ? NULL : receiver_klass(), is_optimized); |
0 | 434 } else { |
435 // Note: the following problem exists with Compiler1: | |
436 // - at compile time we may or may not know if the destination is final | |
437 // - if we know that the destination is final, we will emit an optimized | |
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438 // virtual call (no inline cache), and need a Method* to make a call |
0 | 439 // to the interpreter |
440 // - if we do not know if the destination is final, we emit a standard | |
441 // virtual call, and use CompiledICHolder to call interpreted code | |
442 // (no static call stub has been generated) | |
443 // However in that case we will now notice it is static_bound | |
444 // and convert the call into what looks to be an optimized | |
445 // virtual call. This causes problems in verifying the IC because | |
446 // it look vanilla but is optimized. Code in is_call_to_interpreted | |
447 // is aware of this and weakens its asserts. | |
448 | |
449 // static_bound should imply is_optimized -- otherwise we have a | |
450 // performance bug (statically-bindable method is called via | |
451 // dynamically-dispatched call note: the reverse implication isn't | |
452 // necessarily true -- the call may have been optimized based on compiler | |
453 // analysis (static_bound is only based on "final" etc.) | |
454 #ifdef COMPILER2 | |
455 #ifdef TIERED | |
456 #if defined(ASSERT) | |
457 // can't check the assert because we don't have the CompiledIC with which to | |
458 // find the address if the call instruction. | |
459 // | |
460 // CodeBlob* cb = find_blob_unsafe(instruction_address()); | |
461 // assert(cb->is_compiled_by_c1() || !static_bound || is_optimized, "static_bound should imply is_optimized"); | |
462 #endif // ASSERT | |
463 #else | |
464 assert(!static_bound || is_optimized, "static_bound should imply is_optimized"); | |
465 #endif // TIERED | |
466 #endif // COMPILER2 | |
467 if (is_optimized) { | |
468 // Use stub entry | |
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469 info.set_interpreter_entry(method()->get_c2i_entry(), method()); |
0 | 470 } else { |
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471 // Use icholder entry |
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472 CompiledICHolder* holder = new CompiledICHolder(method(), receiver_klass()); |
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473 info.set_icholder_entry(method()->get_c2i_unverified_entry(), holder); |
0 | 474 } |
475 } | |
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476 assert(info.is_optimized() == is_optimized, "must agree"); |
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477 } |
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478 |
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479 |
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480 bool CompiledIC::is_icholder_entry(address entry) { |
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481 CodeBlob* cb = CodeCache::find_blob_unsafe(entry); |
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482 return (cb != NULL && cb->is_adapter_blob()); |
0 | 483 } |
484 | |
485 // ---------------------------------------------------------------------------- | |
486 | |
487 void CompiledStaticCall::set_to_clean() { | |
488 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); | |
489 // Reset call site | |
490 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
491 #ifdef ASSERT | |
492 CodeBlob* cb = CodeCache::find_blob_unsafe(this); | |
493 assert(cb != NULL && cb->is_nmethod(), "must be nmethod"); | |
494 #endif | |
495 set_destination_mt_safe(SharedRuntime::get_resolve_static_call_stub()); | |
496 | |
497 // Do not reset stub here: It is too expensive to call find_stub. | |
498 // Instead, rely on caller (nmethod::clear_inline_caches) to clear | |
499 // both the call and its stub. | |
500 } | |
501 | |
502 | |
503 bool CompiledStaticCall::is_clean() const { | |
504 return destination() == SharedRuntime::get_resolve_static_call_stub(); | |
505 } | |
506 | |
507 bool CompiledStaticCall::is_call_to_compiled() const { | |
508 return CodeCache::contains(destination()); | |
509 } | |
510 | |
511 | |
512 bool CompiledStaticCall::is_call_to_interpreted() const { | |
513 // It is a call to interpreted, if it calls to a stub. Hence, the destination | |
514 // must be in the stub part of the nmethod that contains the call | |
515 nmethod* nm = CodeCache::find_nmethod(instruction_address()); | |
516 return nm->stub_contains(destination()); | |
517 } | |
518 | |
519 void CompiledStaticCall::set(const StaticCallInfo& info) { | |
520 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); | |
521 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
522 // Updating a cache to the wrong entry can cause bugs that are very hard | |
523 // to track down - if cache entry gets invalid - we just clean it. In | |
524 // this way it is always the same code path that is responsible for | |
525 // updating and resolving an inline cache | |
526 assert(is_clean(), "do not update a call entry - use clean"); | |
527 | |
528 if (info._to_interpreter) { | |
529 // Call to interpreted code | |
530 set_to_interpreted(info.callee(), info.entry()); | |
531 } else { | |
532 if (TraceICs) { | |
533 ResourceMark rm; | |
534 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_compiled " INTPTR_FORMAT, | |
535 instruction_address(), | |
536 info.entry()); | |
537 } | |
538 // Call to compiled code | |
539 assert (CodeCache::contains(info.entry()), "wrong entry point"); | |
540 set_destination_mt_safe(info.entry()); | |
541 } | |
542 } | |
543 | |
544 | |
545 // Compute settings for a CompiledStaticCall. Since we might have to set | |
546 // the stub when calling to the interpreter, we need to return arguments. | |
547 void CompiledStaticCall::compute_entry(methodHandle m, StaticCallInfo& info) { | |
548 nmethod* m_code = m->code(); | |
549 info._callee = m; | |
13441 | 550 if (m_code != NULL && m_code->is_in_use()) { |
0 | 551 info._to_interpreter = false; |
552 info._entry = m_code->verified_entry_point(); | |
553 } else { | |
554 // Callee is interpreted code. In any case entering the interpreter | |
555 // puts a converter-frame on the stack to save arguments. | |
556 info._to_interpreter = true; | |
557 info._entry = m()->get_c2i_entry(); | |
558 } | |
559 } | |
560 | |
561 address CompiledStaticCall::find_stub() { | |
562 // Find reloc. information containing this call-site | |
563 RelocIterator iter((nmethod*)NULL, instruction_address()); | |
564 while (iter.next()) { | |
565 if (iter.addr() == instruction_address()) { | |
566 switch(iter.type()) { | |
567 case relocInfo::static_call_type: | |
568 return iter.static_call_reloc()->static_stub(); | |
569 // We check here for opt_virtual_call_type, since we reuse the code | |
570 // from the CompiledIC implementation | |
571 case relocInfo::opt_virtual_call_type: | |
572 return iter.opt_virtual_call_reloc()->static_stub(); | |
573 case relocInfo::poll_type: | |
574 case relocInfo::poll_return_type: // A safepoint can't overlap a call. | |
575 default: | |
576 ShouldNotReachHere(); | |
577 } | |
578 } | |
579 } | |
580 return NULL; | |
581 } | |
582 | |
583 | |
584 //----------------------------------------------------------------------------- | |
585 // Non-product mode code | |
586 #ifndef PRODUCT | |
587 | |
588 void CompiledIC::verify() { | |
589 // make sure code pattern is actually a call imm32 instruction | |
590 _ic_call->verify(); | |
591 if (os::is_MP()) { | |
592 _ic_call->verify_alignment(); | |
593 } | |
594 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted() | |
595 || is_optimized() || is_megamorphic(), "sanity check"); | |
596 } | |
597 | |
598 void CompiledIC::print() { | |
599 print_compiled_ic(); | |
600 tty->cr(); | |
601 } | |
602 | |
603 void CompiledIC::print_compiled_ic() { | |
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6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
4872
diff
changeset
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604 tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT " cached_value " INTPTR_FORMAT, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
4872
diff
changeset
|
605 instruction_address(), is_call_to_interpreted() ? "interpreted " : "", ic_destination(), is_optimized() ? NULL : cached_value()); |
0 | 606 } |
607 | |
608 void CompiledStaticCall::print() { | |
609 tty->print("static call at " INTPTR_FORMAT " -> ", instruction_address()); | |
610 if (is_clean()) { | |
611 tty->print("clean"); | |
612 } else if (is_call_to_compiled()) { | |
613 tty->print("compiled"); | |
614 } else if (is_call_to_interpreted()) { | |
615 tty->print("interpreted"); | |
616 } | |
617 tty->cr(); | |
618 } | |
619 | |
10168
a6e09d6dd8e5
8003853: specify offset of IC load in java_to_interp stub
dlong
parents:
8776
diff
changeset
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620 #endif // !PRODUCT |