Mercurial > hg > truffle
annotate src/share/vm/opto/bytecodeInfo.cpp @ 2405:3d58a4983660
7022998: JSR 292 recursive method handle calls inline themselves infinitely
Reviewed-by: never, kvn
| author | twisti |
|---|---|
| date | Mon, 28 Mar 2011 03:58:07 -0700 |
| parents | 8033953d67ff |
| children | b21ecca7ccc4 |
| rev | line source |
|---|---|
| 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::shouldInline(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 | |
| 105 int max_size = C->max_inline_size(); | |
| 106 int size = callee_method->code_size(); | |
| 107 | |
| 108 // Check for too many throws (and not too huge) | |
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109 if(callee_method->interpreter_throwout_count() > InlineThrowCount && |
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110 size < InlineThrowMaxSize ) { |
| 0 | 111 wci_result->set_profit(wci_result->profit() * 100); |
| 112 if (PrintInlining && Verbose) { | |
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113 CompileTask::print_inline_indent(inline_depth()); |
| 0 | 114 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); |
| 115 } | |
| 116 return NULL; | |
| 117 } | |
| 118 | |
| 119 if (!UseOldInlining) { | |
| 120 return NULL; // size and frequency are represented in a new way | |
| 121 } | |
| 122 | |
| 123 int call_site_count = method()->scale_count(profile.count()); | |
| 124 int invoke_count = method()->interpreter_invocation_count(); | |
| 125 assert( invoke_count != 0, "Require invokation count greater than zero"); | |
| 126 int freq = call_site_count/invoke_count; | |
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127 |
| 0 | 128 // bump the max size if the call is frequent |
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129 if ((freq >= InlineFrequencyRatio) || |
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130 (call_site_count >= InlineFrequencyCount) || |
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131 is_init_with_ea(callee_method, caller_method, C)) { |
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132 |
| 0 | 133 max_size = C->freq_inline_size(); |
| 134 if (size <= max_size && TraceFrequencyInlining) { | |
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135 CompileTask::print_inline_indent(inline_depth()); |
| 0 | 136 tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count); |
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137 CompileTask::print_inline_indent(inline_depth()); |
| 0 | 138 callee_method->print(); |
| 139 tty->cr(); | |
| 140 } | |
| 141 } else { | |
| 142 // Not hot. Check for medium-sized pre-existing nmethod at cold sites. | |
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143 if (callee_method->has_compiled_code() && |
| 1783 | 144 callee_method->instructions_size(CompLevel_full_optimization) > InlineSmallCode/4) |
| 0 | 145 return "already compiled into a medium method"; |
| 146 } | |
| 147 if (size > max_size) { | |
| 148 if (max_size > C->max_inline_size()) | |
| 149 return "hot method too big"; | |
| 150 return "too big"; | |
| 151 } | |
| 152 return NULL; | |
| 153 } | |
| 154 | |
| 155 | |
| 156 // negative filter: should send NOT be inlined? returns NULL, ok to inline, or rejection msg | |
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157 const char* InlineTree::shouldNotInline(ciMethod *callee_method, ciMethod* caller_method, WarmCallInfo* wci_result) const { |
| 0 | 158 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg |
| 159 if (!UseOldInlining) { | |
| 160 const char* fail = NULL; | |
| 161 if (callee_method->is_abstract()) fail = "abstract method"; | |
| 162 // note: we allow ik->is_abstract() | |
| 163 if (!callee_method->holder()->is_initialized()) fail = "method holder not initialized"; | |
| 164 if (callee_method->is_native()) fail = "native method"; | |
| 165 | |
| 166 if (fail) { | |
| 167 *wci_result = *(WarmCallInfo::always_cold()); | |
| 168 return fail; | |
| 169 } | |
| 170 | |
| 171 if (callee_method->has_unloaded_classes_in_signature()) { | |
| 172 wci_result->set_profit(wci_result->profit() * 0.1); | |
| 173 } | |
| 174 | |
| 175 // don't inline exception code unless the top method belongs to an | |
| 176 // exception class | |
| 177 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
| 178 ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method(); | |
| 179 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
| 180 wci_result->set_profit(wci_result->profit() * 0.1); | |
| 181 } | |
| 182 } | |
| 183 | |
| 1783 | 184 if (callee_method->has_compiled_code() && callee_method->instructions_size(CompLevel_full_optimization) > InlineSmallCode) { |
| 0 | 185 wci_result->set_profit(wci_result->profit() * 0.1); |
| 186 // %%% adjust wci_result->size()? | |
| 187 } | |
| 188 | |
| 189 return NULL; | |
| 190 } | |
| 191 | |
| 1564 | 192 // Always inline MethodHandle methods and generated MethodHandle adapters. |
| 193 if (callee_method->is_method_handle_invoke() || callee_method->is_method_handle_adapter()) | |
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194 return NULL; |
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195 |
| 0 | 196 // First check all inlining restrictions which are required for correctness |
| 197 if (callee_method->is_abstract()) return "abstract method"; | |
| 198 // note: we allow ik->is_abstract() | |
| 199 if (!callee_method->holder()->is_initialized()) return "method holder not initialized"; | |
| 200 if (callee_method->is_native()) return "native method"; | |
| 201 if (callee_method->has_unloaded_classes_in_signature()) return "unloaded signature classes"; | |
| 202 | |
| 203 if (callee_method->should_inline()) { | |
| 204 // ignore heuristic controls on inlining | |
| 205 return NULL; | |
| 206 } | |
| 207 | |
| 208 // Now perform checks which are heuristic | |
| 209 | |
| 1783 | 210 if( callee_method->has_compiled_code() && callee_method->instructions_size(CompLevel_full_optimization) > InlineSmallCode ) |
| 0 | 211 return "already compiled into a big method"; |
| 212 | |
| 213 // don't inline exception code unless the top method belongs to an | |
| 214 // exception class | |
| 215 if (caller_tree() != NULL && | |
| 216 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
| 217 const InlineTree *top = this; | |
| 218 while (top->caller_tree() != NULL) top = top->caller_tree(); | |
| 219 ciInstanceKlass* k = top->method()->holder(); | |
| 220 if (!k->is_subclass_of(C->env()->Throwable_klass())) | |
| 221 return "exception method"; | |
| 222 } | |
| 223 | |
| 224 // use frequency-based objections only for non-trivial methods | |
| 225 if (callee_method->code_size() <= MaxTrivialSize) return NULL; | |
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226 |
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227 // don't use counts with -Xcomp or CTW |
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228 if (UseInterpreter && !CompileTheWorld) { |
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229 |
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230 if (!callee_method->has_compiled_code() && |
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231 !callee_method->was_executed_more_than(0)) { |
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232 return "never executed"; |
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233 } |
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234 |
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235 if (is_init_with_ea(callee_method, caller_method, C)) { |
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236 |
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237 // Escape Analysis: inline all executed constructors |
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238 |
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239 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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240 CompileThreshold >> 1))) { |
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241 return "executed < MinInliningThreshold times"; |
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242 } |
| 0 | 243 } |
| 244 | |
| 245 if (callee_method->should_not_inline()) { | |
| 246 return "disallowed by CompilerOracle"; | |
| 247 } | |
| 248 | |
| 675 | 249 if (UseStringCache) { |
| 250 // Do not inline StringCache::profile() method used only at the beginning. | |
| 251 if (callee_method->name() == ciSymbol::profile_name() && | |
| 252 callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) { | |
| 253 return "profiling method"; | |
| 254 } | |
| 255 } | |
| 256 | |
| 0 | 257 return NULL; |
| 258 } | |
| 259 | |
| 260 //-----------------------------try_to_inline----------------------------------- | |
| 261 // return NULL if ok, reason for not inlining otherwise | |
| 262 // Relocated from "InliningClosure::try_to_inline" | |
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263 const char* InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) { |
| 0 | 264 |
| 265 // Old algorithm had funny accumulating BC-size counters | |
| 266 if (UseOldInlining && ClipInlining | |
| 267 && (int)count_inline_bcs() >= DesiredMethodLimit) { | |
| 268 return "size > DesiredMethodLimit"; | |
| 269 } | |
| 270 | |
| 271 const char *msg = NULL; | |
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272 if ((msg = shouldInline(callee_method, caller_method, caller_bci, |
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273 profile, wci_result)) != NULL) { |
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274 return msg; |
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275 } |
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276 if ((msg = shouldNotInline(callee_method, caller_method, |
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277 wci_result)) != NULL) { |
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278 return msg; |
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279 } |
| 0 | 280 |
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281 if (InlineAccessors && callee_method->is_accessor()) { |
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282 // accessor methods are not subject to any of the following limits. |
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283 return NULL; |
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284 } |
| 0 | 285 |
| 286 // suppress a few checks for accessors and trivial methods | |
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287 if (callee_method->code_size() > MaxTrivialSize) { |
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288 |
| 0 | 289 // don't inline into giant methods |
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290 if (C->unique() > (uint)NodeCountInliningCutoff) { |
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291 return "NodeCountInliningCutoff"; |
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292 } |
| 0 | 293 |
|
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294 if ((!UseInterpreter || CompileTheWorld) && |
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295 is_init_with_ea(callee_method, caller_method, C)) { |
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296 |
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297 // Escape Analysis stress testing when running Xcomp or CTW: |
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298 // inline constructors even if they are not reached. |
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299 |
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300 } else if (profile.count() == 0) { |
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301 // don't inline unreached call sites |
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302 return "call site not reached"; |
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303 } |
| 0 | 304 } |
| 305 | |
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306 if (!C->do_inlining() && InlineAccessors) { |
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307 return "not an accessor"; |
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308 } |
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309 if( inline_depth() > MaxInlineLevel ) { |
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310 return "inlining too deep"; |
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311 } |
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312 |
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313 // We need to detect recursive inlining of method handle targets: if |
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314 // the current method is a method handle adapter and one of the |
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315 // callers is the same method as the callee, we bail out if |
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316 // MaxRecursiveInlineLevel is hit. |
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317 if (method()->is_method_handle_adapter()) { |
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318 JVMState* jvms = caller_jvms(); |
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319 int inline_level = 0; |
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320 while (jvms != NULL && jvms->has_method()) { |
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321 if (jvms->method() == callee_method) { |
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322 inline_level++; |
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323 if (inline_level > MaxRecursiveInlineLevel) |
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324 return "recursively inlining too deep"; |
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325 } |
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326 jvms = jvms->caller(); |
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327 } |
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328 } |
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329 |
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330 if (method() == callee_method && inline_depth() > MaxRecursiveInlineLevel) { |
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331 return "recursively inlining too deep"; |
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332 } |
| 0 | 333 |
| 334 int size = callee_method->code_size(); | |
| 335 | |
| 336 if (UseOldInlining && ClipInlining | |
| 337 && (int)count_inline_bcs() + size >= DesiredMethodLimit) { | |
| 338 return "size > DesiredMethodLimit"; | |
| 339 } | |
| 340 | |
| 341 // ok, inline this method | |
| 342 return NULL; | |
| 343 } | |
| 344 | |
| 345 //------------------------------pass_initial_checks---------------------------- | |
| 346 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { | |
| 347 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; | |
| 348 // Check if a callee_method was suggested | |
| 349 if( callee_method == NULL ) return false; | |
| 350 // Check if klass of callee_method is loaded | |
| 351 if( !callee_holder->is_loaded() ) return false; | |
| 352 if( !callee_holder->is_initialized() ) return false; | |
| 353 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { | |
| 354 // Checks that constant pool's call site has been visited | |
| 355 // stricter than callee_holder->is_initialized() | |
| 356 ciBytecodeStream iter(caller_method); | |
| 357 iter.force_bci(caller_bci); | |
| 358 Bytecodes::Code call_bc = iter.cur_bc(); | |
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359 // An invokedynamic instruction does not have a klass. |
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360 if (call_bc != Bytecodes::_invokedynamic) { |
| 1565 | 361 int index = iter.get_index_u2_cpcache(); |
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362 if (!caller_method->is_klass_loaded(index, true)) { |
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363 return false; |
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364 } |
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365 // Try to do constant pool resolution if running Xcomp |
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366 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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367 return false; |
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368 } |
| 0 | 369 } |
| 370 } | |
| 371 // We will attempt to see if a class/field/etc got properly loaded. If it | |
| 372 // did not, it may attempt to throw an exception during our probing. Catch | |
| 373 // and ignore such exceptions and do not attempt to compile the method. | |
| 374 if( callee_method->should_exclude() ) return false; | |
| 375 | |
| 376 return true; | |
| 377 } | |
| 378 | |
| 379 #ifndef PRODUCT | |
| 380 //------------------------------print_inlining--------------------------------- | |
| 381 // Really, the failure_msg can be a success message also. | |
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382 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, const char* failure_msg) const { |
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383 CompileTask::print_inlining(callee_method, inline_depth(), caller_bci, failure_msg ? failure_msg : "inline"); |
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384 if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); |
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385 if (Verbose && callee_method) { |
| 0 | 386 const InlineTree *top = this; |
| 387 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } | |
| 388 tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); | |
| 389 } | |
| 390 } | |
| 391 #endif | |
| 392 | |
| 393 //------------------------------ok_to_inline----------------------------------- | |
| 394 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci) { | |
| 395 assert(callee_method != NULL, "caller checks for optimized virtual!"); | |
| 396 #ifdef ASSERT | |
| 397 // Make sure the incoming jvms has the same information content as me. | |
| 398 // This means that we can eventually make this whole class AllStatic. | |
| 399 if (jvms->caller() == NULL) { | |
| 400 assert(_caller_jvms == NULL, "redundant instance state"); | |
| 401 } else { | |
| 402 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); | |
| 403 } | |
| 404 assert(_method == jvms->method(), "redundant instance state"); | |
| 405 #endif | |
| 406 const char *failure_msg = NULL; | |
| 407 int caller_bci = jvms->bci(); | |
| 408 ciMethod *caller_method = jvms->method(); | |
| 409 | |
| 410 if( !pass_initial_checks(caller_method, caller_bci, callee_method)) { | |
| 411 if( PrintInlining ) { | |
| 412 failure_msg = "failed_initial_checks"; | |
| 413 print_inlining( callee_method, caller_bci, failure_msg); | |
| 414 } | |
| 415 return NULL; | |
| 416 } | |
| 417 | |
| 418 // Check if inlining policy says no. | |
| 419 WarmCallInfo wci = *(initial_wci); | |
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420 failure_msg = try_to_inline(callee_method, caller_method, caller_bci, profile, &wci); |
| 0 | 421 if (failure_msg != NULL && C->log() != NULL) { |
| 422 C->log()->begin_elem("inline_fail reason='"); | |
| 423 C->log()->text("%s", failure_msg); | |
| 424 C->log()->end_elem("'"); | |
| 425 } | |
| 426 | |
| 427 #ifndef PRODUCT | |
| 428 if (UseOldInlining && InlineWarmCalls | |
| 429 && (PrintOpto || PrintOptoInlining || PrintInlining)) { | |
| 430 bool cold = wci.is_cold(); | |
| 431 bool hot = !cold && wci.is_hot(); | |
| 432 bool old_cold = (failure_msg != NULL); | |
| 433 if (old_cold != cold || (Verbose || WizardMode)) { | |
| 434 tty->print(" OldInlining= %4s : %s\n WCI=", | |
| 435 old_cold ? "cold" : "hot", failure_msg ? failure_msg : "OK"); | |
| 436 wci.print(); | |
| 437 } | |
| 438 } | |
| 439 #endif | |
| 440 if (UseOldInlining) { | |
| 441 if (failure_msg == NULL) | |
| 442 wci = *(WarmCallInfo::always_hot()); | |
| 443 else | |
| 444 wci = *(WarmCallInfo::always_cold()); | |
| 445 } | |
| 446 if (!InlineWarmCalls) { | |
| 447 if (!wci.is_cold() && !wci.is_hot()) { | |
| 448 // Do not inline the warm calls. | |
| 449 wci = *(WarmCallInfo::always_cold()); | |
| 450 } | |
| 451 } | |
| 452 | |
| 453 if (!wci.is_cold()) { | |
| 454 // In -UseOldInlining, the failure_msg may also be a success message. | |
| 455 if (failure_msg == NULL) failure_msg = "inline (hot)"; | |
| 456 | |
| 457 // Inline! | |
| 458 if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg); | |
| 459 if (UseOldInlining) | |
| 460 build_inline_tree_for_callee(callee_method, jvms, caller_bci); | |
| 461 if (InlineWarmCalls && !wci.is_hot()) | |
| 462 return new (C) WarmCallInfo(wci); // copy to heap | |
| 463 return WarmCallInfo::always_hot(); | |
| 464 } | |
| 465 | |
| 466 // Do not inline | |
| 467 if (failure_msg == NULL) failure_msg = "too cold to inline"; | |
| 468 if( PrintInlining ) print_inlining( callee_method, caller_bci, failure_msg); | |
| 469 return NULL; | |
| 470 } | |
| 471 | |
| 472 //------------------------------compute_callee_frequency----------------------- | |
| 473 float InlineTree::compute_callee_frequency( int caller_bci ) const { | |
| 474 int count = method()->interpreter_call_site_count(caller_bci); | |
| 475 int invcnt = method()->interpreter_invocation_count(); | |
| 476 float freq = (float)count/(float)invcnt; | |
| 477 // Call-site count / interpreter invocation count, scaled recursively. | |
| 478 // Always between 0.0 and 1.0. Represents the percentage of the method's | |
| 479 // total execution time used at this call site. | |
| 480 | |
| 481 return freq; | |
| 482 } | |
| 483 | |
| 484 //------------------------------build_inline_tree_for_callee------------------- | |
| 485 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { | |
| 486 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); | |
| 487 // Attempt inlining. | |
| 488 InlineTree* old_ilt = callee_at(caller_bci, callee_method); | |
| 489 if (old_ilt != NULL) { | |
| 490 return old_ilt; | |
| 491 } | |
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492 int new_depth_adjust = 0; |
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493 if (caller_jvms->method() != NULL) { |
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494 if (caller_jvms->method()->is_method_handle_adapter()) |
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495 new_depth_adjust -= 1; // don't count actions in MH or indy adapter frames |
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496 else if (callee_method->is_method_handle_invoke()) { |
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497 new_depth_adjust -= 1; // don't count method handle calls from java.lang.invoke implem |
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498 } |
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499 if (new_depth_adjust != 0 && PrintInlining) { |
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500 stringStream nm1; caller_jvms->method()->print_name(&nm1); |
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501 stringStream nm2; callee_method->print_name(&nm2); |
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502 tty->print_cr("discounting inlining depth from %s to %s", nm1.base(), nm2.base()); |
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503 } |
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504 if (new_depth_adjust != 0 && C->log()) { |
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505 int id1 = C->log()->identify(caller_jvms->method()); |
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506 int id2 = C->log()->identify(callee_method); |
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507 C->log()->elem("inline_depth_discount caller='%d' callee='%d'", id1, id2); |
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508 } |
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509 } |
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510 InlineTree *ilt = new InlineTree(C, this, callee_method, caller_jvms, caller_bci, recur_frequency, _site_depth_adjust + new_depth_adjust); |
| 0 | 511 _subtrees.append( ilt ); |
| 512 | |
| 513 NOT_PRODUCT( _count_inlines += 1; ) | |
| 514 | |
| 515 return ilt; | |
| 516 } | |
| 517 | |
| 518 | |
| 519 //---------------------------------------callee_at----------------------------- | |
| 520 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { | |
| 521 for (int i = 0; i < _subtrees.length(); i++) { | |
| 522 InlineTree* sub = _subtrees.at(i); | |
| 523 if (sub->caller_bci() == bci && callee == sub->method()) { | |
| 524 return sub; | |
| 525 } | |
| 526 } | |
| 527 return NULL; | |
| 528 } | |
| 529 | |
| 530 | |
| 531 //------------------------------build_inline_tree_root------------------------- | |
| 532 InlineTree *InlineTree::build_inline_tree_root() { | |
| 533 Compile* C = Compile::current(); | |
| 534 | |
| 535 // Root of inline tree | |
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536 InlineTree *ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, 0); |
| 0 | 537 |
| 538 return ilt; | |
| 539 } | |
| 540 | |
| 541 | |
| 542 //-------------------------find_subtree_from_root----------------------------- | |
| 543 // Given a jvms, which determines a call chain from the root method, | |
| 544 // find the corresponding inline tree. | |
| 545 // Note: This method will be removed or replaced as InlineTree goes away. | |
| 546 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee, bool create_if_not_found) { | |
| 547 InlineTree* iltp = root; | |
| 548 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; | |
| 549 for (uint d = 1; d <= depth; d++) { | |
| 550 JVMState* jvmsp = jvms->of_depth(d); | |
| 551 // Select the corresponding subtree for this bci. | |
| 552 assert(jvmsp->method() == iltp->method(), "tree still in sync"); | |
| 553 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); | |
| 554 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); | |
| 555 if (!sub) { | |
| 556 if (create_if_not_found && d == depth) { | |
| 557 return iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); | |
| 558 } | |
| 559 assert(sub != NULL, "should be a sub-ilt here"); | |
| 560 return NULL; | |
| 561 } | |
| 562 iltp = sub; | |
| 563 } | |
| 564 return iltp; | |
| 565 } |