Mercurial > hg > truffle
annotate src/share/vm/opto/bytecodeInfo.cpp @ 3450:3275a6560cf7
7053520: JSR292: crash in invokedynamic with C1 using tiered and compressed oops
Reviewed-by: iveresov, never
author | twisti |
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date | Tue, 14 Jun 2011 12:25:05 -0700 |
parents | e2a92dd0d3d2 |
children | 393e144bb99b |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2011, 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 "classfile/vmSymbols.hpp" | |
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28 #include "compiler/compileBroker.hpp" |
1972 | 29 #include "compiler/compileLog.hpp" |
30 #include "interpreter/linkResolver.hpp" | |
31 #include "oops/objArrayKlass.hpp" | |
32 #include "opto/callGenerator.hpp" | |
33 #include "opto/parse.hpp" | |
34 #include "runtime/handles.inline.hpp" | |
0 | 35 |
36 //============================================================================= | |
37 //------------------------------InlineTree------------------------------------- | |
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38 InlineTree::InlineTree( Compile* c, |
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39 const InlineTree *caller_tree, ciMethod* callee, |
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40 JVMState* caller_jvms, int caller_bci, |
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41 float site_invoke_ratio, int site_depth_adjust) |
0 | 42 : C(c), _caller_jvms(caller_jvms), |
43 _caller_tree((InlineTree*)caller_tree), | |
44 _method(callee), _site_invoke_ratio(site_invoke_ratio), | |
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45 _site_depth_adjust(site_depth_adjust), |
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46 _count_inline_bcs(method()->code_size()) |
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47 { |
0 | 48 NOT_PRODUCT(_count_inlines = 0;) |
49 if (_caller_jvms != NULL) { | |
50 // Keep a private copy of the caller_jvms: | |
51 _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms()); | |
52 _caller_jvms->set_bci(caller_jvms->bci()); | |
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53 assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining"); |
0 | 54 } |
55 assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS"); | |
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56 assert((caller_tree == NULL ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter"); |
0 | 57 assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter"); |
58 if (UseOldInlining) { | |
59 // Update hierarchical counts, count_inline_bcs() and count_inlines() | |
60 InlineTree *caller = (InlineTree *)caller_tree; | |
61 for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) { | |
62 caller->_count_inline_bcs += count_inline_bcs(); | |
63 NOT_PRODUCT(caller->_count_inlines++;) | |
64 } | |
65 } | |
66 } | |
67 | |
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68 InlineTree::InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms, |
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69 float site_invoke_ratio, int site_depth_adjust) |
0 | 70 : C(c), _caller_jvms(caller_jvms), _caller_tree(NULL), |
71 _method(callee_method), _site_invoke_ratio(site_invoke_ratio), | |
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72 _site_depth_adjust(site_depth_adjust), |
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73 _count_inline_bcs(method()->code_size()) |
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74 { |
0 | 75 NOT_PRODUCT(_count_inlines = 0;) |
76 assert(!UseOldInlining, "do not use for old stuff"); | |
77 } | |
78 | |
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79 static bool is_init_with_ea(ciMethod* callee_method, |
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80 ciMethod* caller_method, Compile* C) { |
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81 // True when EA is ON and a java constructor is called or |
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82 // a super constructor is called from an inlined java constructor. |
244 | 83 return C->do_escape_analysis() && EliminateAllocations && |
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84 ( callee_method->is_initializer() || |
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85 (caller_method->is_initializer() && |
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86 caller_method != C->method() && |
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87 caller_method->holder()->is_subclass_of(callee_method->holder())) |
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88 ); |
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89 } |
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90 |
0 | 91 // positive filter: should send be inlined? returns NULL, if yes, or rejection msg |
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92 const char* InlineTree::should_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) const { |
0 | 93 // Allows targeted inlining |
94 if(callee_method->should_inline()) { | |
95 *wci_result = *(WarmCallInfo::always_hot()); | |
96 if (PrintInlining && Verbose) { | |
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97 CompileTask::print_inline_indent(inline_depth()); |
0 | 98 tty->print_cr("Inlined method is hot: "); |
99 } | |
100 return NULL; | |
101 } | |
102 | |
103 // positive filter: should send be inlined? returns NULL (--> yes) | |
104 // or rejection msg | |
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105 int size = callee_method->code_size(); |
0 | 106 |
107 // Check for too many throws (and not too huge) | |
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108 if(callee_method->interpreter_throwout_count() > InlineThrowCount && |
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109 size < InlineThrowMaxSize ) { |
0 | 110 wci_result->set_profit(wci_result->profit() * 100); |
111 if (PrintInlining && Verbose) { | |
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112 CompileTask::print_inline_indent(inline_depth()); |
0 | 113 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); |
114 } | |
115 return NULL; | |
116 } | |
117 | |
118 if (!UseOldInlining) { | |
119 return NULL; // size and frequency are represented in a new way | |
120 } | |
121 | |
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122 int default_max_inline_size = C->max_inline_size(); |
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123 int inline_small_code_size = InlineSmallCode / 4; |
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124 int max_inline_size = default_max_inline_size; |
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125 |
0 | 126 int call_site_count = method()->scale_count(profile.count()); |
127 int invoke_count = method()->interpreter_invocation_count(); | |
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128 |
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129 // Bytecoded method handle adapters do not have interpreter |
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130 // profiling data but only made up MDO data. Get the counter from |
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131 // there. |
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132 if (caller_method->is_method_handle_adapter()) { |
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133 assert(method()->method_data_or_null(), "must have an MDO"); |
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134 ciMethodData* mdo = method()->method_data(); |
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135 ciProfileData* mha_profile = mdo->bci_to_data(caller_bci); |
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136 assert(mha_profile, "must exist"); |
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137 CounterData* cd = mha_profile->as_CounterData(); |
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138 invoke_count = cd->count(); |
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139 call_site_count = invoke_count; // use the same value |
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140 } |
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141 |
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142 assert(invoke_count != 0, "require invocation count greater than zero"); |
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143 int freq = call_site_count / invoke_count; |
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144 |
0 | 145 // bump the max size if the call is frequent |
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146 if ((freq >= InlineFrequencyRatio) || |
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147 (call_site_count >= InlineFrequencyCount) || |
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148 is_init_with_ea(callee_method, caller_method, C)) { |
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149 |
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150 max_inline_size = C->freq_inline_size(); |
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151 if (size <= max_inline_size && TraceFrequencyInlining) { |
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152 CompileTask::print_inline_indent(inline_depth()); |
0 | 153 tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count); |
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154 CompileTask::print_inline_indent(inline_depth()); |
0 | 155 callee_method->print(); |
156 tty->cr(); | |
157 } | |
158 } else { | |
159 // Not hot. Check for medium-sized pre-existing nmethod at cold sites. | |
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160 if (callee_method->has_compiled_code() && |
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161 callee_method->instructions_size(CompLevel_full_optimization) > inline_small_code_size) |
0 | 162 return "already compiled into a medium method"; |
163 } | |
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164 if (size > max_inline_size) { |
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165 if (max_inline_size > default_max_inline_size) |
0 | 166 return "hot method too big"; |
167 return "too big"; | |
168 } | |
169 return NULL; | |
170 } | |
171 | |
172 | |
173 // negative filter: should send NOT be inlined? returns NULL, ok to inline, or rejection msg | |
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174 const char* InlineTree::should_not_inline(ciMethod *callee_method, ciMethod* caller_method, WarmCallInfo* wci_result) const { |
0 | 175 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg |
176 if (!UseOldInlining) { | |
177 const char* fail = NULL; | |
178 if (callee_method->is_abstract()) fail = "abstract method"; | |
179 // note: we allow ik->is_abstract() | |
180 if (!callee_method->holder()->is_initialized()) fail = "method holder not initialized"; | |
181 if (callee_method->is_native()) fail = "native method"; | |
182 | |
183 if (fail) { | |
184 *wci_result = *(WarmCallInfo::always_cold()); | |
185 return fail; | |
186 } | |
187 | |
188 if (callee_method->has_unloaded_classes_in_signature()) { | |
189 wci_result->set_profit(wci_result->profit() * 0.1); | |
190 } | |
191 | |
192 // don't inline exception code unless the top method belongs to an | |
193 // exception class | |
194 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
195 ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method(); | |
196 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
197 wci_result->set_profit(wci_result->profit() * 0.1); | |
198 } | |
199 } | |
200 | |
1783 | 201 if (callee_method->has_compiled_code() && callee_method->instructions_size(CompLevel_full_optimization) > InlineSmallCode) { |
0 | 202 wci_result->set_profit(wci_result->profit() * 0.1); |
203 // %%% adjust wci_result->size()? | |
204 } | |
205 | |
206 return NULL; | |
207 } | |
208 | |
1564 | 209 // Always inline MethodHandle methods and generated MethodHandle adapters. |
210 if (callee_method->is_method_handle_invoke() || callee_method->is_method_handle_adapter()) | |
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211 return NULL; |
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212 |
0 | 213 // First check all inlining restrictions which are required for correctness |
214 if (callee_method->is_abstract()) return "abstract method"; | |
215 // note: we allow ik->is_abstract() | |
216 if (!callee_method->holder()->is_initialized()) return "method holder not initialized"; | |
217 if (callee_method->is_native()) return "native method"; | |
218 if (callee_method->has_unloaded_classes_in_signature()) return "unloaded signature classes"; | |
219 | |
220 if (callee_method->should_inline()) { | |
221 // ignore heuristic controls on inlining | |
222 return NULL; | |
223 } | |
224 | |
225 // Now perform checks which are heuristic | |
226 | |
1783 | 227 if( callee_method->has_compiled_code() && callee_method->instructions_size(CompLevel_full_optimization) > InlineSmallCode ) |
0 | 228 return "already compiled into a big method"; |
229 | |
230 // don't inline exception code unless the top method belongs to an | |
231 // exception class | |
232 if (caller_tree() != NULL && | |
233 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
234 const InlineTree *top = this; | |
235 while (top->caller_tree() != NULL) top = top->caller_tree(); | |
236 ciInstanceKlass* k = top->method()->holder(); | |
237 if (!k->is_subclass_of(C->env()->Throwable_klass())) | |
238 return "exception method"; | |
239 } | |
240 | |
241 // use frequency-based objections only for non-trivial methods | |
242 if (callee_method->code_size() <= MaxTrivialSize) return NULL; | |
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243 |
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244 // don't use counts with -Xcomp or CTW |
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245 if (UseInterpreter && !CompileTheWorld) { |
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246 |
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247 if (!callee_method->has_compiled_code() && |
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248 !callee_method->was_executed_more_than(0)) { |
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249 return "never executed"; |
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250 } |
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251 |
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252 if (is_init_with_ea(callee_method, caller_method, C)) { |
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253 |
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254 // Escape Analysis: inline all executed constructors |
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255 |
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256 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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257 CompileThreshold >> 1))) { |
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258 return "executed < MinInliningThreshold times"; |
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259 } |
0 | 260 } |
261 | |
262 if (callee_method->should_not_inline()) { | |
263 return "disallowed by CompilerOracle"; | |
264 } | |
265 | |
675 | 266 if (UseStringCache) { |
267 // Do not inline StringCache::profile() method used only at the beginning. | |
268 if (callee_method->name() == ciSymbol::profile_name() && | |
269 callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) { | |
270 return "profiling method"; | |
271 } | |
272 } | |
273 | |
0 | 274 return NULL; |
275 } | |
276 | |
277 //-----------------------------try_to_inline----------------------------------- | |
278 // return NULL if ok, reason for not inlining otherwise | |
279 // Relocated from "InliningClosure::try_to_inline" | |
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280 const char* InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) { |
0 | 281 |
282 // Old algorithm had funny accumulating BC-size counters | |
283 if (UseOldInlining && ClipInlining | |
284 && (int)count_inline_bcs() >= DesiredMethodLimit) { | |
285 return "size > DesiredMethodLimit"; | |
286 } | |
287 | |
288 const char *msg = NULL; | |
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289 msg = should_inline(callee_method, caller_method, caller_bci, profile, wci_result); |
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290 if (msg != NULL) |
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291 return msg; |
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292 |
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293 msg = should_not_inline(callee_method, caller_method, wci_result); |
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294 if (msg != NULL) |
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295 return msg; |
0 | 296 |
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297 if (InlineAccessors && callee_method->is_accessor()) { |
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298 // accessor methods are not subject to any of the following limits. |
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299 return NULL; |
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300 } |
0 | 301 |
302 // suppress a few checks for accessors and trivial methods | |
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303 if (callee_method->code_size() > MaxTrivialSize) { |
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304 |
0 | 305 // don't inline into giant methods |
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306 if (C->unique() > (uint)NodeCountInliningCutoff) { |
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307 return "NodeCountInliningCutoff"; |
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308 } |
0 | 309 |
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310 if ((!UseInterpreter || CompileTheWorld) && |
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311 is_init_with_ea(callee_method, caller_method, C)) { |
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312 |
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313 // Escape Analysis stress testing when running Xcomp or CTW: |
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314 // inline constructors even if they are not reached. |
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315 |
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316 } else if (profile.count() == 0) { |
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317 // don't inline unreached call sites |
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318 return "call site not reached"; |
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319 } |
0 | 320 } |
321 | |
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322 if (!C->do_inlining() && InlineAccessors) { |
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323 return "not an accessor"; |
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324 } |
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325 if( inline_depth() > MaxInlineLevel ) { |
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326 return "inlining too deep"; |
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327 } |
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328 |
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329 // detect direct and indirect recursive inlining |
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330 { |
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331 // count the current method and the callee |
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332 int inline_level = (method() == callee_method) ? 1 : 0; |
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333 if (inline_level > MaxRecursiveInlineLevel) |
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334 return "recursively inlining too deep"; |
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335 // count callers of current method and callee |
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336 JVMState* jvms = caller_jvms(); |
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337 while (jvms != NULL && jvms->has_method()) { |
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338 if (jvms->method() == callee_method) { |
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339 inline_level++; |
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340 if (inline_level > MaxRecursiveInlineLevel) |
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341 return "recursively inlining too deep"; |
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342 } |
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343 jvms = jvms->caller(); |
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344 } |
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345 } |
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346 |
0 | 347 int size = callee_method->code_size(); |
348 | |
349 if (UseOldInlining && ClipInlining | |
350 && (int)count_inline_bcs() + size >= DesiredMethodLimit) { | |
351 return "size > DesiredMethodLimit"; | |
352 } | |
353 | |
354 // ok, inline this method | |
355 return NULL; | |
356 } | |
357 | |
358 //------------------------------pass_initial_checks---------------------------- | |
359 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { | |
360 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; | |
361 // Check if a callee_method was suggested | |
362 if( callee_method == NULL ) return false; | |
363 // Check if klass of callee_method is loaded | |
364 if( !callee_holder->is_loaded() ) return false; | |
365 if( !callee_holder->is_initialized() ) return false; | |
366 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { | |
367 // Checks that constant pool's call site has been visited | |
368 // stricter than callee_holder->is_initialized() | |
369 ciBytecodeStream iter(caller_method); | |
370 iter.force_bci(caller_bci); | |
371 Bytecodes::Code call_bc = iter.cur_bc(); | |
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372 // An invokedynamic instruction does not have a klass. |
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373 if (call_bc != Bytecodes::_invokedynamic) { |
1565 | 374 int index = iter.get_index_u2_cpcache(); |
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375 if (!caller_method->is_klass_loaded(index, true)) { |
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376 return false; |
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377 } |
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378 // Try to do constant pool resolution if running Xcomp |
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379 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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380 return false; |
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381 } |
0 | 382 } |
383 } | |
384 // We will attempt to see if a class/field/etc got properly loaded. If it | |
385 // did not, it may attempt to throw an exception during our probing. Catch | |
386 // and ignore such exceptions and do not attempt to compile the method. | |
387 if( callee_method->should_exclude() ) return false; | |
388 | |
389 return true; | |
390 } | |
391 | |
392 //------------------------------print_inlining--------------------------------- | |
393 // Really, the failure_msg can be a success message also. | |
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394 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, const char* failure_msg) const { |
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395 CompileTask::print_inlining(callee_method, inline_depth(), caller_bci, failure_msg ? failure_msg : "inline"); |
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396 if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); |
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397 if (Verbose && callee_method) { |
0 | 398 const InlineTree *top = this; |
399 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } | |
400 tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); | |
401 } | |
402 } | |
403 | |
404 //------------------------------ok_to_inline----------------------------------- | |
405 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci) { | |
406 assert(callee_method != NULL, "caller checks for optimized virtual!"); | |
407 #ifdef ASSERT | |
408 // Make sure the incoming jvms has the same information content as me. | |
409 // This means that we can eventually make this whole class AllStatic. | |
410 if (jvms->caller() == NULL) { | |
411 assert(_caller_jvms == NULL, "redundant instance state"); | |
412 } else { | |
413 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); | |
414 } | |
415 assert(_method == jvms->method(), "redundant instance state"); | |
416 #endif | |
417 const char *failure_msg = NULL; | |
418 int caller_bci = jvms->bci(); | |
419 ciMethod *caller_method = jvms->method(); | |
420 | |
421 if( !pass_initial_checks(caller_method, caller_bci, callee_method)) { | |
422 if( PrintInlining ) { | |
423 failure_msg = "failed_initial_checks"; | |
424 print_inlining( callee_method, caller_bci, failure_msg); | |
425 } | |
426 return NULL; | |
427 } | |
428 | |
429 // Check if inlining policy says no. | |
430 WarmCallInfo wci = *(initial_wci); | |
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431 failure_msg = try_to_inline(callee_method, caller_method, caller_bci, profile, &wci); |
0 | 432 if (failure_msg != NULL && C->log() != NULL) { |
433 C->log()->begin_elem("inline_fail reason='"); | |
434 C->log()->text("%s", failure_msg); | |
435 C->log()->end_elem("'"); | |
436 } | |
437 | |
438 #ifndef PRODUCT | |
439 if (UseOldInlining && InlineWarmCalls | |
440 && (PrintOpto || PrintOptoInlining || PrintInlining)) { | |
441 bool cold = wci.is_cold(); | |
442 bool hot = !cold && wci.is_hot(); | |
443 bool old_cold = (failure_msg != NULL); | |
444 if (old_cold != cold || (Verbose || WizardMode)) { | |
445 tty->print(" OldInlining= %4s : %s\n WCI=", | |
446 old_cold ? "cold" : "hot", failure_msg ? failure_msg : "OK"); | |
447 wci.print(); | |
448 } | |
449 } | |
450 #endif | |
451 if (UseOldInlining) { | |
452 if (failure_msg == NULL) | |
453 wci = *(WarmCallInfo::always_hot()); | |
454 else | |
455 wci = *(WarmCallInfo::always_cold()); | |
456 } | |
457 if (!InlineWarmCalls) { | |
458 if (!wci.is_cold() && !wci.is_hot()) { | |
459 // Do not inline the warm calls. | |
460 wci = *(WarmCallInfo::always_cold()); | |
461 } | |
462 } | |
463 | |
464 if (!wci.is_cold()) { | |
465 // In -UseOldInlining, the failure_msg may also be a success message. | |
466 if (failure_msg == NULL) failure_msg = "inline (hot)"; | |
467 | |
468 // Inline! | |
469 if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg); | |
470 if (UseOldInlining) | |
471 build_inline_tree_for_callee(callee_method, jvms, caller_bci); | |
472 if (InlineWarmCalls && !wci.is_hot()) | |
473 return new (C) WarmCallInfo(wci); // copy to heap | |
474 return WarmCallInfo::always_hot(); | |
475 } | |
476 | |
477 // Do not inline | |
478 if (failure_msg == NULL) failure_msg = "too cold to inline"; | |
479 if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg); | |
480 return NULL; | |
481 } | |
482 | |
483 //------------------------------compute_callee_frequency----------------------- | |
484 float InlineTree::compute_callee_frequency( int caller_bci ) const { | |
485 int count = method()->interpreter_call_site_count(caller_bci); | |
486 int invcnt = method()->interpreter_invocation_count(); | |
487 float freq = (float)count/(float)invcnt; | |
488 // Call-site count / interpreter invocation count, scaled recursively. | |
489 // Always between 0.0 and 1.0. Represents the percentage of the method's | |
490 // total execution time used at this call site. | |
491 | |
492 return freq; | |
493 } | |
494 | |
495 //------------------------------build_inline_tree_for_callee------------------- | |
496 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { | |
497 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); | |
498 // Attempt inlining. | |
499 InlineTree* old_ilt = callee_at(caller_bci, callee_method); | |
500 if (old_ilt != NULL) { | |
501 return old_ilt; | |
502 } | |
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503 int new_depth_adjust = 0; |
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504 if (caller_jvms->method() != NULL) { |
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505 if (caller_jvms->method()->is_method_handle_adapter()) |
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506 new_depth_adjust -= 1; // don't count actions in MH or indy adapter frames |
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507 else if (callee_method->is_method_handle_invoke()) { |
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508 new_depth_adjust -= 1; // don't count method handle calls from java.lang.invoke implem |
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509 } |
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510 if (new_depth_adjust != 0 && PrintInlining) { |
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511 CompileTask::print_inline_indent(inline_depth()); |
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512 tty->print_cr(" \\-> discounting inline depth"); |
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513 } |
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514 if (new_depth_adjust != 0 && C->log()) { |
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515 int id1 = C->log()->identify(caller_jvms->method()); |
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516 int id2 = C->log()->identify(callee_method); |
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517 C->log()->elem("inline_depth_discount caller='%d' callee='%d'", id1, id2); |
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518 } |
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519 } |
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520 InlineTree *ilt = new InlineTree(C, this, callee_method, caller_jvms, caller_bci, recur_frequency, _site_depth_adjust + new_depth_adjust); |
0 | 521 _subtrees.append( ilt ); |
522 | |
523 NOT_PRODUCT( _count_inlines += 1; ) | |
524 | |
525 return ilt; | |
526 } | |
527 | |
528 | |
529 //---------------------------------------callee_at----------------------------- | |
530 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { | |
531 for (int i = 0; i < _subtrees.length(); i++) { | |
532 InlineTree* sub = _subtrees.at(i); | |
533 if (sub->caller_bci() == bci && callee == sub->method()) { | |
534 return sub; | |
535 } | |
536 } | |
537 return NULL; | |
538 } | |
539 | |
540 | |
541 //------------------------------build_inline_tree_root------------------------- | |
542 InlineTree *InlineTree::build_inline_tree_root() { | |
543 Compile* C = Compile::current(); | |
544 | |
545 // Root of inline tree | |
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546 InlineTree *ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, 0); |
0 | 547 |
548 return ilt; | |
549 } | |
550 | |
551 | |
552 //-------------------------find_subtree_from_root----------------------------- | |
553 // Given a jvms, which determines a call chain from the root method, | |
554 // find the corresponding inline tree. | |
555 // Note: This method will be removed or replaced as InlineTree goes away. | |
556 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee, bool create_if_not_found) { | |
557 InlineTree* iltp = root; | |
558 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; | |
559 for (uint d = 1; d <= depth; d++) { | |
560 JVMState* jvmsp = jvms->of_depth(d); | |
561 // Select the corresponding subtree for this bci. | |
562 assert(jvmsp->method() == iltp->method(), "tree still in sync"); | |
563 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); | |
564 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); | |
565 if (!sub) { | |
566 if (create_if_not_found && d == depth) { | |
567 return iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); | |
568 } | |
569 assert(sub != NULL, "should be a sub-ilt here"); | |
570 return NULL; | |
571 } | |
572 iltp = sub; | |
573 } | |
574 return iltp; | |
575 } |