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annotate src/share/vm/code/compiledIC.cpp @ 20271:c64b6b0c40c8
8047326: Consolidate all CompiledIC::CompiledIC implementations and move it to compiledIC.cpp
Reviewed-by: vlivanov, ehelin
author | stefank |
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date | Wed, 25 Jun 2014 08:56:57 +0200 |
parents | 78bbf4d43a14 |
children | 882004b9e7e1 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, 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, p2i(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", p2i((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 | |
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162 CompiledIC::CompiledIC(nmethod* nm, NativeCall* call) |
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163 : _ic_call(call) |
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164 { |
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165 address ic_call = call->instruction_address(); |
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166 |
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167 assert(ic_call != NULL, "ic_call address must be set"); |
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168 assert(nm != NULL, "must pass nmethod"); |
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169 assert(nm->contains(ic_call), "must be in nmethod"); |
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170 |
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171 // Search for the ic_call at the given address. |
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172 RelocIterator iter(nm, ic_call, ic_call+1); |
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173 bool ret = iter.next(); |
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174 assert(ret == true, "relocInfo must exist at this address"); |
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175 assert(iter.addr() == ic_call, "must find ic_call"); |
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176 if (iter.type() == relocInfo::virtual_call_type) { |
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177 virtual_call_Relocation* r = iter.virtual_call_reloc(); |
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178 _is_optimized = false; |
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179 _value = nativeMovConstReg_at(r->cached_value()); |
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180 } else { |
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181 assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call"); |
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182 _is_optimized = true; |
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183 _value = NULL; |
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184 } |
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185 } |
0 | 186 |
12294 | 187 bool CompiledIC::set_to_megamorphic(CallInfo* call_info, Bytecodes::Code bytecode, TRAPS) { |
0 | 188 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
189 assert(!is_optimized(), "cannot set an optimized virtual call to megamorphic"); | |
190 assert(is_call_to_compiled() || is_call_to_interpreted(), "going directly to megamorphic?"); | |
191 | |
192 address entry; | |
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193 if (call_info->call_kind() == CallInfo::itable_call) { |
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194 assert(bytecode == Bytecodes::_invokeinterface, ""); |
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195 int itable_index = call_info->itable_index(); |
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196 entry = VtableStubs::find_itable_stub(itable_index); |
12294 | 197 if (entry == false) { |
198 return false; | |
199 } | |
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200 #ifdef ASSERT |
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201 int index = call_info->resolved_method()->itable_index(); |
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202 assert(index == itable_index, "CallInfo pre-computes this"); |
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203 #endif //ASSERT |
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204 InstanceKlass* k = call_info->resolved_method()->method_holder(); |
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205 assert(k->verify_itable_index(itable_index), "sanity check"); |
0 | 206 InlineCacheBuffer::create_transition_stub(this, k, entry); |
207 } else { | |
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208 assert(call_info->call_kind() == CallInfo::vtable_call, "either itable or vtable"); |
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209 // Can be different than selected_method->vtable_index(), due to package-private etc. |
0 | 210 int vtable_index = call_info->vtable_index(); |
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211 assert(call_info->resolved_klass()->verify_vtable_index(vtable_index), "sanity check"); |
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212 entry = VtableStubs::find_vtable_stub(vtable_index); |
12294 | 213 if (entry == NULL) { |
214 return false; | |
215 } | |
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216 InlineCacheBuffer::create_transition_stub(this, NULL, entry); |
0 | 217 } |
218 | |
219 if (TraceICs) { | |
220 ResourceMark rm; | |
221 tty->print_cr ("IC@" INTPTR_FORMAT ": to megamorphic %s entry: " INTPTR_FORMAT, | |
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222 p2i(instruction_address()), call_info->selected_method()->print_value_string(), p2i(entry)); |
0 | 223 } |
224 | |
225 // We can't check this anymore. With lazy deopt we could have already | |
226 // cleaned this IC entry before we even return. This is possible if | |
227 // we ran out of space in the inline cache buffer trying to do the | |
228 // set_next and we safepointed to free up space. This is a benign | |
229 // race because the IC entry was complete when we safepointed so | |
230 // cleaning it immediately is harmless. | |
231 // assert(is_megamorphic(), "sanity check"); | |
12294 | 232 return true; |
0 | 233 } |
234 | |
235 | |
236 // true if destination is megamorphic stub | |
237 bool CompiledIC::is_megamorphic() const { | |
238 assert(CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); | |
239 assert(!is_optimized(), "an optimized call cannot be megamorphic"); | |
240 | |
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241 // Cannot rely on cached_value. It is either an interface or a method. |
0 | 242 return VtableStubs::is_entry_point(ic_destination()); |
243 } | |
244 | |
245 bool CompiledIC::is_call_to_compiled() const { | |
246 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); | |
247 | |
248 // Use unsafe, since an inline cache might point to a zombie method. However, the zombie | |
249 // method is guaranteed to still exist, since we only remove methods after all inline caches | |
250 // has been cleaned up | |
251 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination()); | |
252 bool is_monomorphic = (cb != NULL && cb->is_nmethod()); | |
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253 // Check that the cached_value is a klass for non-optimized monomorphic calls |
0 | 254 // This assertion is invalid for compiler1: a call that does not look optimized (no static stub) can be used |
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255 // for calling directly to vep without using the inline cache (i.e., cached_value == NULL) |
0 | 256 #ifdef ASSERT |
257 CodeBlob* caller = CodeCache::find_blob_unsafe(instruction_address()); | |
258 bool is_c1_method = caller->is_compiled_by_c1(); | |
259 assert( is_c1_method || | |
260 !is_monomorphic || | |
261 is_optimized() || | |
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262 (cached_metadata() != NULL && cached_metadata()->is_klass()), "sanity check"); |
0 | 263 #endif // ASSERT |
264 return is_monomorphic; | |
265 } | |
266 | |
267 | |
268 bool CompiledIC::is_call_to_interpreted() const { | |
269 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); | |
270 // Call to interpreter if destination is either calling to a stub (if it | |
271 // is optimized), or calling to an I2C blob | |
272 bool is_call_to_interpreted = false; | |
273 if (!is_optimized()) { | |
274 // must use unsafe because the destination can be a zombie (and we're cleaning) | |
275 // and the print_compiled_ic code wants to know if site (in the non-zombie) | |
276 // is to the interpreter. | |
277 CodeBlob* cb = CodeCache::find_blob_unsafe(ic_destination()); | |
278 is_call_to_interpreted = (cb != NULL && cb->is_adapter_blob()); | |
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279 assert(!is_call_to_interpreted || (is_icholder_call() && cached_icholder() != NULL), "sanity check"); |
0 | 280 } else { |
281 // Check if we are calling into our own codeblob (i.e., to a stub) | |
282 CodeBlob* cb = CodeCache::find_blob(_ic_call->instruction_address()); | |
283 address dest = ic_destination(); | |
284 #ifdef ASSERT | |
285 { | |
286 CodeBlob* db = CodeCache::find_blob_unsafe(dest); | |
287 assert(!db->is_adapter_blob(), "must use stub!"); | |
288 } | |
289 #endif /* ASSERT */ | |
290 is_call_to_interpreted = cb->contains(dest); | |
291 } | |
292 return is_call_to_interpreted; | |
293 } | |
294 | |
295 | |
296 void CompiledIC::set_to_clean() { | |
297 assert(SafepointSynchronize::is_at_safepoint() || CompiledIC_lock->is_locked() , "MT-unsafe call"); | |
298 if (TraceInlineCacheClearing || TraceICs) { | |
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299 tty->print_cr("IC@" INTPTR_FORMAT ": set to clean", p2i(instruction_address())); |
0 | 300 print(); |
301 } | |
302 | |
303 address entry; | |
304 if (is_optimized()) { | |
305 entry = SharedRuntime::get_resolve_opt_virtual_call_stub(); | |
306 } else { | |
307 entry = SharedRuntime::get_resolve_virtual_call_stub(); | |
308 } | |
309 | |
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310 // A zombie transition will always be safe, since the metadata has already been set to NULL, so |
0 | 311 // we only need to patch the destination |
312 bool safe_transition = is_optimized() || SafepointSynchronize::is_at_safepoint(); | |
313 | |
314 if (safe_transition) { | |
315 // Kill any leftover stub we might have too | |
316 if (is_in_transition_state()) { | |
317 ICStub* old_stub = ICStub_from_destination_address(stub_address()); | |
318 old_stub->clear(); | |
319 } | |
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320 if (is_optimized()) { |
0 | 321 set_ic_destination(entry); |
322 } else { | |
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323 set_ic_destination_and_value(entry, (void*)NULL); |
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324 } |
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325 } else { |
0 | 326 // Unsafe transition - create stub. |
327 InlineCacheBuffer::create_transition_stub(this, NULL, entry); | |
328 } | |
329 // We can't check this anymore. With lazy deopt we could have already | |
330 // cleaned this IC entry before we even return. This is possible if | |
331 // we ran out of space in the inline cache buffer trying to do the | |
332 // set_next and we safepointed to free up space. This is a benign | |
333 // race because the IC entry was complete when we safepointed so | |
334 // cleaning it immediately is harmless. | |
335 // assert(is_clean(), "sanity check"); | |
336 } | |
337 | |
338 | |
339 bool CompiledIC::is_clean() const { | |
340 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); | |
341 bool is_clean = false; | |
342 address dest = ic_destination(); | |
343 is_clean = dest == SharedRuntime::get_resolve_opt_virtual_call_stub() || | |
344 dest == SharedRuntime::get_resolve_virtual_call_stub(); | |
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345 assert(!is_clean || is_optimized() || cached_value() == NULL, "sanity check"); |
0 | 346 return is_clean; |
347 } | |
348 | |
349 | |
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350 void CompiledIC::set_to_monomorphic(CompiledICInfo& info) { |
0 | 351 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), ""); |
352 // Updating a cache to the wrong entry can cause bugs that are very hard | |
353 // to track down - if cache entry gets invalid - we just clean it. In | |
354 // this way it is always the same code path that is responsible for | |
355 // updating and resolving an inline cache | |
356 // | |
357 // The above is no longer true. SharedRuntime::fixup_callers_callsite will change optimized | |
358 // callsites. In addition ic_miss code will update a site to monomorphic if it determines | |
359 // that an monomorphic call to the interpreter can now be monomorphic to compiled code. | |
360 // | |
361 // In both of these cases the only thing being modifed is the jump/call target and these | |
362 // transitions are mt_safe | |
363 | |
364 Thread *thread = Thread::current(); | |
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365 if (info.to_interpreter()) { |
0 | 366 // Call to interpreter |
367 if (info.is_optimized() && is_optimized()) { | |
368 assert(is_clean(), "unsafe IC path"); | |
369 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
370 // the call analysis (callee structure) specifies that the call is optimized | |
371 // (either because of CHA or the static target is final) | |
372 // At code generation time, this call has been emitted as static call | |
373 // Call via stub | |
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374 assert(info.cached_metadata() != NULL && info.cached_metadata()->is_method(), "sanity check"); |
0 | 375 CompiledStaticCall* csc = compiledStaticCall_at(instruction_address()); |
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376 methodHandle method (thread, (Method*)info.cached_metadata()); |
0 | 377 csc->set_to_interpreted(method, info.entry()); |
378 if (TraceICs) { | |
379 ResourceMark rm(thread); | |
380 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter: %s", | |
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381 p2i(instruction_address()), |
0 | 382 method->print_value_string()); |
383 } | |
384 } else { | |
385 // Call via method-klass-holder | |
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386 InlineCacheBuffer::create_transition_stub(this, info.claim_cached_icholder(), info.entry()); |
0 | 387 if (TraceICs) { |
388 ResourceMark rm(thread); | |
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389 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to interpreter via icholder ", p2i(instruction_address())); |
0 | 390 } |
391 } | |
392 } else { | |
393 // Call to compiled code | |
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394 bool static_bound = info.is_optimized() || (info.cached_metadata() == NULL); |
0 | 395 #ifdef ASSERT |
396 CodeBlob* cb = CodeCache::find_blob_unsafe(info.entry()); | |
397 assert (cb->is_nmethod(), "must be compiled!"); | |
398 #endif /* ASSERT */ | |
399 | |
400 // This is MT safe if we come from a clean-cache and go through a | |
401 // non-verified entry point | |
402 bool safe = SafepointSynchronize::is_at_safepoint() || | |
403 (!is_in_transition_state() && (info.is_optimized() || static_bound || is_clean())); | |
404 | |
405 if (!safe) { | |
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406 InlineCacheBuffer::create_transition_stub(this, info.cached_metadata(), info.entry()); |
0 | 407 } else { |
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408 if (is_optimized()) { |
0 | 409 set_ic_destination(info.entry()); |
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410 } else { |
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411 set_ic_destination_and_value(info.entry(), info.cached_metadata()); |
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412 } |
0 | 413 } |
414 | |
415 if (TraceICs) { | |
416 ResourceMark rm(thread); | |
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417 assert(info.cached_metadata() == NULL || info.cached_metadata()->is_klass(), "must be"); |
0 | 418 tty->print_cr ("IC@" INTPTR_FORMAT ": monomorphic to compiled (rcvr klass) %s: %s", |
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419 p2i(instruction_address()), |
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420 ((Klass*)info.cached_metadata())->print_value_string(), |
0 | 421 (safe) ? "" : "via stub"); |
422 } | |
423 } | |
424 // We can't check this anymore. With lazy deopt we could have already | |
425 // cleaned this IC entry before we even return. This is possible if | |
426 // we ran out of space in the inline cache buffer trying to do the | |
427 // set_next and we safepointed to free up space. This is a benign | |
428 // race because the IC entry was complete when we safepointed so | |
429 // cleaning it immediately is harmless. | |
430 // assert(is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); | |
431 } | |
432 | |
433 | |
434 // is_optimized: Compiler has generated an optimized call (i.e., no inline | |
435 // cache) static_bound: The call can be static bound (i.e, no need to use | |
436 // inline cache) | |
437 void CompiledIC::compute_monomorphic_entry(methodHandle method, | |
438 KlassHandle receiver_klass, | |
439 bool is_optimized, | |
440 bool static_bound, | |
441 CompiledICInfo& info, | |
442 TRAPS) { | |
443 nmethod* method_code = method->code(); | |
444 address entry = NULL; | |
13441 | 445 if (method_code != NULL && method_code->is_in_use()) { |
0 | 446 // Call to compiled code |
447 if (static_bound || is_optimized) { | |
448 entry = method_code->verified_entry_point(); | |
449 } else { | |
450 entry = method_code->entry_point(); | |
451 } | |
452 } | |
453 if (entry != NULL) { | |
454 // Call to compiled code | |
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455 info.set_compiled_entry(entry, (static_bound || is_optimized) ? NULL : receiver_klass(), is_optimized); |
0 | 456 } else { |
457 // Note: the following problem exists with Compiler1: | |
458 // - at compile time we may or may not know if the destination is final | |
459 // - if we know that the destination is final, we will emit an optimized | |
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460 // virtual call (no inline cache), and need a Method* to make a call |
0 | 461 // to the interpreter |
462 // - if we do not know if the destination is final, we emit a standard | |
463 // virtual call, and use CompiledICHolder to call interpreted code | |
464 // (no static call stub has been generated) | |
465 // However in that case we will now notice it is static_bound | |
466 // and convert the call into what looks to be an optimized | |
467 // virtual call. This causes problems in verifying the IC because | |
468 // it look vanilla but is optimized. Code in is_call_to_interpreted | |
469 // is aware of this and weakens its asserts. | |
470 | |
471 // static_bound should imply is_optimized -- otherwise we have a | |
472 // performance bug (statically-bindable method is called via | |
473 // dynamically-dispatched call note: the reverse implication isn't | |
474 // necessarily true -- the call may have been optimized based on compiler | |
475 // analysis (static_bound is only based on "final" etc.) | |
476 #ifdef COMPILER2 | |
477 #ifdef TIERED | |
478 #if defined(ASSERT) | |
479 // can't check the assert because we don't have the CompiledIC with which to | |
480 // find the address if the call instruction. | |
481 // | |
482 // CodeBlob* cb = find_blob_unsafe(instruction_address()); | |
483 // assert(cb->is_compiled_by_c1() || !static_bound || is_optimized, "static_bound should imply is_optimized"); | |
484 #endif // ASSERT | |
485 #else | |
486 assert(!static_bound || is_optimized, "static_bound should imply is_optimized"); | |
487 #endif // TIERED | |
488 #endif // COMPILER2 | |
489 if (is_optimized) { | |
490 // Use stub entry | |
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491 info.set_interpreter_entry(method()->get_c2i_entry(), method()); |
0 | 492 } else { |
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493 // Use icholder entry |
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494 CompiledICHolder* holder = new CompiledICHolder(method(), receiver_klass()); |
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495 info.set_icholder_entry(method()->get_c2i_unverified_entry(), holder); |
0 | 496 } |
497 } | |
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498 assert(info.is_optimized() == is_optimized, "must agree"); |
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499 } |
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500 |
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501 |
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502 bool CompiledIC::is_icholder_entry(address entry) { |
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503 CodeBlob* cb = CodeCache::find_blob_unsafe(entry); |
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504 return (cb != NULL && cb->is_adapter_blob()); |
0 | 505 } |
506 | |
507 // ---------------------------------------------------------------------------- | |
508 | |
509 void CompiledStaticCall::set_to_clean() { | |
510 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); | |
511 // Reset call site | |
512 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
513 #ifdef ASSERT | |
514 CodeBlob* cb = CodeCache::find_blob_unsafe(this); | |
515 assert(cb != NULL && cb->is_nmethod(), "must be nmethod"); | |
516 #endif | |
517 set_destination_mt_safe(SharedRuntime::get_resolve_static_call_stub()); | |
518 | |
519 // Do not reset stub here: It is too expensive to call find_stub. | |
520 // Instead, rely on caller (nmethod::clear_inline_caches) to clear | |
521 // both the call and its stub. | |
522 } | |
523 | |
524 | |
525 bool CompiledStaticCall::is_clean() const { | |
526 return destination() == SharedRuntime::get_resolve_static_call_stub(); | |
527 } | |
528 | |
529 bool CompiledStaticCall::is_call_to_compiled() const { | |
530 return CodeCache::contains(destination()); | |
531 } | |
532 | |
533 | |
534 bool CompiledStaticCall::is_call_to_interpreted() const { | |
535 // It is a call to interpreted, if it calls to a stub. Hence, the destination | |
536 // must be in the stub part of the nmethod that contains the call | |
537 nmethod* nm = CodeCache::find_nmethod(instruction_address()); | |
538 return nm->stub_contains(destination()); | |
539 } | |
540 | |
541 void CompiledStaticCall::set(const StaticCallInfo& info) { | |
542 assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); | |
543 MutexLockerEx pl(Patching_lock, Mutex::_no_safepoint_check_flag); | |
544 // Updating a cache to the wrong entry can cause bugs that are very hard | |
545 // to track down - if cache entry gets invalid - we just clean it. In | |
546 // this way it is always the same code path that is responsible for | |
547 // updating and resolving an inline cache | |
548 assert(is_clean(), "do not update a call entry - use clean"); | |
549 | |
550 if (info._to_interpreter) { | |
551 // Call to interpreted code | |
552 set_to_interpreted(info.callee(), info.entry()); | |
553 } else { | |
554 if (TraceICs) { | |
555 ResourceMark rm; | |
556 tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_compiled " INTPTR_FORMAT, | |
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557 p2i(instruction_address()), |
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558 p2i(info.entry())); |
0 | 559 } |
560 // Call to compiled code | |
561 assert (CodeCache::contains(info.entry()), "wrong entry point"); | |
562 set_destination_mt_safe(info.entry()); | |
563 } | |
564 } | |
565 | |
566 | |
567 // Compute settings for a CompiledStaticCall. Since we might have to set | |
568 // the stub when calling to the interpreter, we need to return arguments. | |
569 void CompiledStaticCall::compute_entry(methodHandle m, StaticCallInfo& info) { | |
570 nmethod* m_code = m->code(); | |
571 info._callee = m; | |
13441 | 572 if (m_code != NULL && m_code->is_in_use()) { |
0 | 573 info._to_interpreter = false; |
574 info._entry = m_code->verified_entry_point(); | |
575 } else { | |
576 // Callee is interpreted code. In any case entering the interpreter | |
577 // puts a converter-frame on the stack to save arguments. | |
578 info._to_interpreter = true; | |
579 info._entry = m()->get_c2i_entry(); | |
580 } | |
581 } | |
582 | |
583 address CompiledStaticCall::find_stub() { | |
584 // Find reloc. information containing this call-site | |
585 RelocIterator iter((nmethod*)NULL, instruction_address()); | |
586 while (iter.next()) { | |
587 if (iter.addr() == instruction_address()) { | |
588 switch(iter.type()) { | |
589 case relocInfo::static_call_type: | |
590 return iter.static_call_reloc()->static_stub(); | |
591 // We check here for opt_virtual_call_type, since we reuse the code | |
592 // from the CompiledIC implementation | |
593 case relocInfo::opt_virtual_call_type: | |
594 return iter.opt_virtual_call_reloc()->static_stub(); | |
595 case relocInfo::poll_type: | |
596 case relocInfo::poll_return_type: // A safepoint can't overlap a call. | |
597 default: | |
598 ShouldNotReachHere(); | |
599 } | |
600 } | |
601 } | |
602 return NULL; | |
603 } | |
604 | |
605 | |
606 //----------------------------------------------------------------------------- | |
607 // Non-product mode code | |
608 #ifndef PRODUCT | |
609 | |
610 void CompiledIC::verify() { | |
611 // make sure code pattern is actually a call imm32 instruction | |
612 _ic_call->verify(); | |
613 if (os::is_MP()) { | |
614 _ic_call->verify_alignment(); | |
615 } | |
616 assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted() | |
617 || is_optimized() || is_megamorphic(), "sanity check"); | |
618 } | |
619 | |
620 void CompiledIC::print() { | |
621 print_compiled_ic(); | |
622 tty->cr(); | |
623 } | |
624 | |
625 void CompiledIC::print_compiled_ic() { | |
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626 tty->print("Inline cache at " INTPTR_FORMAT ", calling %s " INTPTR_FORMAT " cached_value " INTPTR_FORMAT, |
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627 p2i(instruction_address()), is_call_to_interpreted() ? "interpreted " : "", p2i(ic_destination()), p2i(is_optimized() ? NULL : cached_value())); |
0 | 628 } |
629 | |
630 void CompiledStaticCall::print() { | |
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631 tty->print("static call at " INTPTR_FORMAT " -> ", p2i(instruction_address())); |
0 | 632 if (is_clean()) { |
633 tty->print("clean"); | |
634 } else if (is_call_to_compiled()) { | |
635 tty->print("compiled"); | |
636 } else if (is_call_to_interpreted()) { | |
637 tty->print("interpreted"); | |
638 } | |
639 tty->cr(); | |
640 } | |
641 | |
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642 #endif // !PRODUCT |