jdk8-mips64-public/hotspot: src/share/vm/opto/bytecodeInfo.cpp@bd7a7ce2e264 (annotated)

src/share/vm/opto/bytecodeInfo.cpp@bd7a7ce2e264 (annotated)

src/share/vm/opto/bytecodeInfo.cpp

Mon, 12 Nov 2012 14:03:53 -0800

author: minqi
date: Mon, 12 Nov 2012 14:03:53 -0800
changeset 4267: bd7a7ce2e264
parent 4164: d804e148cff8
child 4357: ad5dd04754ee
permissions: -rw-r--r--

6830717: replay of compilations would help with debugging
Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method.
Reviewed-by: kvn, twisti, sspitsyn
Contributed-by: yumin.qi@oracle.com

 /*
  * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "ci/ciReplay.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "classfile/vmSymbols.hpp"
 #include "compiler/compileBroker.hpp"
 #include "compiler/compileLog.hpp"
 #include "interpreter/linkResolver.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "opto/callGenerator.hpp"
 #include "opto/parse.hpp"
 #include "runtime/handles.inline.hpp"
 //=============================================================================
 //------------------------------InlineTree-------------------------------------
 InlineTree::InlineTree(Compile* c,
                        const InlineTree *caller_tree, ciMethod* callee,
                        JVMState* caller_jvms, int caller_bci,
                        float site_invoke_ratio, int max_inline_level) :
   C(c),
   _caller_jvms(caller_jvms),
   _caller_tree((InlineTree*) caller_tree),
   _method(callee),
   _site_invoke_ratio(site_invoke_ratio),
   _max_inline_level(max_inline_level),
   _count_inline_bcs(method()->code_size_for_inlining())
 {
   NOT_PRODUCT(_count_inlines = 0;)
   if (_caller_jvms != NULL) {
     // Keep a private copy of the caller_jvms:
     _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms());
     _caller_jvms->set_bci(caller_jvms->bci());
     assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining");
   }
   assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS");
   assert((caller_tree == NULL ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter");
   assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter");
   if (UseOldInlining) {
     // Update hierarchical counts, count_inline_bcs() and count_inlines()
     InlineTree *caller = (InlineTree *)caller_tree;
     for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) {
       caller->_count_inline_bcs += count_inline_bcs();
       NOT_PRODUCT(caller->_count_inlines++;)
     }
   }
 }
 InlineTree::InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms,
                        float site_invoke_ratio, int max_inline_level) :
   C(c),
   _caller_jvms(caller_jvms),
   _caller_tree(NULL),
   _method(callee_method),
   _site_invoke_ratio(site_invoke_ratio),
   _max_inline_level(max_inline_level),
   _count_inline_bcs(method()->code_size())
 {
   NOT_PRODUCT(_count_inlines = 0;)
   assert(!UseOldInlining, "do not use for old stuff");
 }
 static bool is_init_with_ea(ciMethod* callee_method,
                             ciMethod* caller_method, Compile* C) {
   // True when EA is ON and a java constructor is called or
   // a super constructor is called from an inlined java constructor.
   return C->do_escape_analysis() && EliminateAllocations &&
          ( callee_method->is_initializer() ||
            (caller_method->is_initializer() &&
             caller_method != C->method() &&
             caller_method->holder()->is_subclass_of(callee_method->holder()))
          );
 }
 // positive filter: should callee be inlined?  returns NULL, if yes, or rejection msg
 const char* InlineTree::should_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) const {
   // Allows targeted inlining
   if(callee_method->should_inline()) {
     *wci_result = *(WarmCallInfo::always_hot());
     if (PrintInlining && Verbose) {
       CompileTask::print_inline_indent(inline_level());
       tty->print_cr("Inlined method is hot: ");
     }
     return NULL;
   }
   // positive filter: should send be inlined?  returns NULL (--> yes)
   // or rejection msg
   int size = callee_method->code_size_for_inlining();
   // Check for too many throws (and not too huge)
   if(callee_method->interpreter_throwout_count() > InlineThrowCount &&
      size < InlineThrowMaxSize ) {
     wci_result->set_profit(wci_result->profit() * 100);
     if (PrintInlining && Verbose) {
       CompileTask::print_inline_indent(inline_level());
       tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count());
     }
     return NULL;
   }
   if (!UseOldInlining) {
     return NULL;  // size and frequency are represented in a new way
   }
   int default_max_inline_size = C->max_inline_size();
   int inline_small_code_size  = InlineSmallCode / 4;
   int max_inline_size         = default_max_inline_size;
   int call_site_count  = method()->scale_count(profile.count());
   int invoke_count     = method()->interpreter_invocation_count();
   assert(invoke_count != 0, "require invocation count greater than zero");
   int freq = call_site_count / invoke_count;
   // bump the max size if the call is frequent
   if ((freq >= InlineFrequencyRatio) ||
       (call_site_count >= InlineFrequencyCount) ||
       is_init_with_ea(callee_method, caller_method, C)) {
     max_inline_size = C->freq_inline_size();
     if (size <= max_inline_size && TraceFrequencyInlining) {
       CompileTask::print_inline_indent(inline_level());
       tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count);
       CompileTask::print_inline_indent(inline_level());
       callee_method->print();
       tty->cr();
     }
   } else {
     // Not hot.  Check for medium-sized pre-existing nmethod at cold sites.
     if (callee_method->has_compiled_code() &&
         callee_method->instructions_size() > inline_small_code_size)
       return "already compiled into a medium method";
   }
   if (size > max_inline_size) {
     if (max_inline_size > default_max_inline_size)
       return "hot method too big";
     return "too big";
   }
   return NULL;
 }
 // negative filter: should callee NOT be inlined?  returns NULL, ok to inline, or rejection msg
 const char* InlineTree::should_not_inline(ciMethod *callee_method, ciMethod* caller_method, WarmCallInfo* wci_result) const {
   // negative filter: should send NOT be inlined?  returns NULL (--> inline) or rejection msg
   if (!UseOldInlining) {
     const char* fail = NULL;
     if ( callee_method->is_abstract())               fail = "abstract method";
     // note: we allow ik->is_abstract()
     if (!callee_method->holder()->is_initialized())  fail = "method holder not initialized";
     if ( callee_method->is_native())                 fail = "native method";
     if ( callee_method->dont_inline())               fail = "don't inline by annotation";
     if (fail) {
       *wci_result = *(WarmCallInfo::always_cold());
       return fail;
     }
     if (callee_method->has_unloaded_classes_in_signature()) {
       wci_result->set_profit(wci_result->profit() * 0.1);
     }
     // don't inline exception code unless the top method belongs to an
     // exception class
     if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) {
       ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method();
       if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) {
         wci_result->set_profit(wci_result->profit() * 0.1);
       }
     }
     if (callee_method->has_compiled_code() &&
         callee_method->instructions_size() > InlineSmallCode) {
       wci_result->set_profit(wci_result->profit() * 0.1);
       // %%% adjust wci_result->size()?
     }
     return NULL;
   }
   // First check all inlining restrictions which are required for correctness
   if ( callee_method->is_abstract())                        return "abstract method";
   // note: we allow ik->is_abstract()
   if (!callee_method->holder()->is_initialized())           return "method holder not initialized";
   if ( callee_method->is_native())                          return "native method";
   if ( callee_method->dont_inline())                        return "don't inline by annotation";
   if ( callee_method->has_unloaded_classes_in_signature())  return "unloaded signature classes";
   if (callee_method->force_inline() || callee_method->should_inline()) {
     // ignore heuristic controls on inlining
     return NULL;
   }
   // Now perform checks which are heuristic
   if (callee_method->has_compiled_code() &&
       callee_method->instructions_size() > InlineSmallCode) {
     return "already compiled into a big method";
   }
   // don't inline exception code unless the top method belongs to an
   // exception class
   if (caller_tree() != NULL &&
       callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) {
     const InlineTree *top = this;
     while (top->caller_tree() != NULL) top = top->caller_tree();
     ciInstanceKlass* k = top->method()->holder();
     if (!k->is_subclass_of(C->env()->Throwable_klass()))
       return "exception method";
   }
   if (callee_method->should_not_inline()) {
     return "disallowed by CompilerOracle";
   }
 #ifndef PRODUCT
   if (ciReplay::should_not_inline(callee_method)) {
     return "disallowed by ciReplay";
   }
 #endif
   if (UseStringCache) {
     // Do not inline StringCache::profile() method used only at the beginning.
     if (callee_method->name() == ciSymbol::profile_name() &&
         callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) {
       return "profiling method";
     }
   }
   // use frequency-based objections only for non-trivial methods
   if (callee_method->code_size() <= MaxTrivialSize) return NULL;
   // don't use counts with -Xcomp or CTW
   if (UseInterpreter && !CompileTheWorld) {
     if (!callee_method->has_compiled_code() &&
         !callee_method->was_executed_more_than(0)) {
       return "never executed";
     }
     if (is_init_with_ea(callee_method, caller_method, C)) {
       // Escape Analysis: inline all executed constructors
     } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold,
                                                            CompileThreshold >> 1))) {
       return "executed < MinInliningThreshold times";
     }
   }
   return NULL;
 }
 //-----------------------------try_to_inline-----------------------------------
 // return NULL if ok, reason for not inlining otherwise
 // Relocated from "InliningClosure::try_to_inline"
 const char* InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) {
   // Old algorithm had funny accumulating BC-size counters
   if (UseOldInlining && ClipInlining
       && (int)count_inline_bcs() >= DesiredMethodLimit) {
     return "size > DesiredMethodLimit";
   }
   const char *msg = NULL;
   msg = should_inline(callee_method, caller_method, caller_bci, profile, wci_result);
   if (msg != NULL)
     return msg;
   msg = should_not_inline(callee_method, caller_method, wci_result);
   if (msg != NULL)
     return msg;
   if (InlineAccessors && callee_method->is_accessor()) {
     // accessor methods are not subject to any of the following limits.
     return NULL;
   }
   // suppress a few checks for accessors and trivial methods
   if (callee_method->code_size() > MaxTrivialSize) {
     // don't inline into giant methods
     if (C->unique() > (uint)NodeCountInliningCutoff) {
       return "NodeCountInliningCutoff";
     }
     if ((!UseInterpreter || CompileTheWorld) &&
         is_init_with_ea(callee_method, caller_method, C)) {
       // Escape Analysis stress testing when running Xcomp or CTW:
       // inline constructors even if they are not reached.
     } else if (profile.count() == 0) {
       // don't inline unreached call sites
       return "call site not reached";
     }
   }
   if (!C->do_inlining() && InlineAccessors) {
     return "not an accessor";
   }
   if (inline_level() > _max_inline_level) {
     return "inlining too deep";
   }
   // detect direct and indirect recursive inlining
   if (!callee_method->is_compiled_lambda_form()) {
     // count the current method and the callee
     int inline_level = (method() == callee_method) ? 1 : 0;
     if (inline_level > MaxRecursiveInlineLevel)
       return "recursively inlining too deep";
     // count callers of current method and callee
     JVMState* jvms = caller_jvms();
     while (jvms != NULL && jvms->has_method()) {
       if (jvms->method() == callee_method) {
         inline_level++;
         if (inline_level > MaxRecursiveInlineLevel)
           return "recursively inlining too deep";
       }
       jvms = jvms->caller();
     }
   }
   int size = callee_method->code_size_for_inlining();
   if (UseOldInlining && ClipInlining
       && (int)count_inline_bcs() + size >= DesiredMethodLimit) {
     return "size > DesiredMethodLimit";
   }
   // ok, inline this method
   return NULL;
 }
 //------------------------------pass_initial_checks----------------------------
 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) {
   ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL;
   // Check if a callee_method was suggested
   if( callee_method == NULL )            return false;
   // Check if klass of callee_method is loaded
   if( !callee_holder->is_loaded() )      return false;
   if( !callee_holder->is_initialized() ) return false;
   if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) {
     // Checks that constant pool's call site has been visited
     // stricter than callee_holder->is_initialized()
     ciBytecodeStream iter(caller_method);
     iter.force_bci(caller_bci);
     Bytecodes::Code call_bc = iter.cur_bc();
     // An invokedynamic instruction does not have a klass.
     if (call_bc != Bytecodes::_invokedynamic) {
       int index = iter.get_index_u2_cpcache();
       if (!caller_method->is_klass_loaded(index, true)) {
         return false;
       }
       // Try to do constant pool resolution if running Xcomp
       if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) {
         return false;
       }
     }
   }
   // We will attempt to see if a class/field/etc got properly loaded.  If it
   // did not, it may attempt to throw an exception during our probing.  Catch
   // and ignore such exceptions and do not attempt to compile the method.
   if( callee_method->should_exclude() )  return false;
   return true;
 }
 //------------------------------check_can_parse--------------------------------
 const char* InlineTree::check_can_parse(ciMethod* callee) {
   // Certain methods cannot be parsed at all:
   if ( callee->is_native())                     return "native method";
   if ( callee->is_abstract())                   return "abstract method";
   if (!callee->can_be_compiled())               return "not compilable (disabled)";
   if (!callee->has_balanced_monitors())         return "not compilable (unbalanced monitors)";
   if ( callee->get_flow_analysis()->failing())  return "not compilable (flow analysis failed)";
   return NULL;
 }
 //------------------------------print_inlining---------------------------------
 // Really, the failure_msg can be a success message also.
 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, const char* failure_msg) const {
   CompileTask::print_inlining(callee_method, inline_level(), caller_bci, failure_msg ? failure_msg : "inline");
   if (callee_method == NULL)  tty->print(" callee not monotonic or profiled");
   if (Verbose && callee_method) {
     const InlineTree *top = this;
     while( top->caller_tree() != NULL ) { top = top->caller_tree(); }
     //tty->print("  bcs: %d+%d  invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count());
   }
 }
 //------------------------------ok_to_inline-----------------------------------
 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci) {
   assert(callee_method != NULL, "caller checks for optimized virtual!");
 #ifdef ASSERT
   // Make sure the incoming jvms has the same information content as me.
   // This means that we can eventually make this whole class AllStatic.
   if (jvms->caller() == NULL) {
     assert(_caller_jvms == NULL, "redundant instance state");
   } else {
     assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state");
   }
   assert(_method == jvms->method(), "redundant instance state");
 #endif
   const char *failure_msg   = NULL;
   int         caller_bci    = jvms->bci();
   ciMethod   *caller_method = jvms->method();
   // Do some initial checks.
   if (!pass_initial_checks(caller_method, caller_bci, callee_method)) {
     if (PrintInlining)  print_inlining(callee_method, caller_bci, "failed initial checks");
     return NULL;
   }
   // Do some parse checks.
   failure_msg = check_can_parse(callee_method);
   if (failure_msg != NULL) {
     if (PrintInlining)  print_inlining(callee_method, caller_bci, failure_msg);
     return NULL;
   }
   // Check if inlining policy says no.
   WarmCallInfo wci = *(initial_wci);
   failure_msg = try_to_inline(callee_method, caller_method, caller_bci, profile, &wci);
   if (failure_msg != NULL && C->log() != NULL) {
     C->log()->inline_fail(failure_msg);
   }
 #ifndef PRODUCT
   if (UseOldInlining && InlineWarmCalls
       && (PrintOpto || PrintOptoInlining || PrintInlining)) {
     bool cold = wci.is_cold();
     bool hot  = !cold && wci.is_hot();
     bool old_cold = (failure_msg != NULL);
     if (old_cold != cold || (Verbose || WizardMode)) {
       tty->print("   OldInlining= %4s : %s\n           WCI=",
                  old_cold ? "cold" : "hot", failure_msg ? failure_msg : "OK");
       wci.print();
     }
   }
 #endif
   if (UseOldInlining) {
     if (failure_msg == NULL)
       wci = *(WarmCallInfo::always_hot());
     else
       wci = *(WarmCallInfo::always_cold());
   }
   if (!InlineWarmCalls) {
     if (!wci.is_cold() && !wci.is_hot()) {
       // Do not inline the warm calls.
       wci = *(WarmCallInfo::always_cold());
     }
   }
   if (!wci.is_cold()) {
     // In -UseOldInlining, the failure_msg may also be a success message.
     if (failure_msg == NULL)  failure_msg = "inline (hot)";
     // Inline!
     if (PrintInlining)  print_inlining(callee_method, caller_bci, failure_msg);
     if (UseOldInlining)
       build_inline_tree_for_callee(callee_method, jvms, caller_bci);
     if (InlineWarmCalls && !wci.is_hot())
       return new (C) WarmCallInfo(wci);  // copy to heap
     return WarmCallInfo::always_hot();
   }
   // Do not inline
   if (failure_msg == NULL)  failure_msg = "too cold to inline";
   if (PrintInlining)  print_inlining(callee_method, caller_bci, failure_msg);
   return NULL;
 }
 //------------------------------compute_callee_frequency-----------------------
 float InlineTree::compute_callee_frequency( int caller_bci ) const {
   int count  = method()->interpreter_call_site_count(caller_bci);
   int invcnt = method()->interpreter_invocation_count();
   float freq = (float)count/(float)invcnt;
   // Call-site count / interpreter invocation count, scaled recursively.
   // Always between 0.0 and 1.0.  Represents the percentage of the method's
   // total execution time used at this call site.
   return freq;
 }
 //------------------------------build_inline_tree_for_callee-------------------
 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) {
   float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci);
   // Attempt inlining.
   InlineTree* old_ilt = callee_at(caller_bci, callee_method);
   if (old_ilt != NULL) {
     return old_ilt;
   }
   int max_inline_level_adjust = 0;
   if (caller_jvms->method() != NULL) {
     if (caller_jvms->method()->is_compiled_lambda_form())
       max_inline_level_adjust += 1;  // don't count actions in MH or indy adapter frames
     else if (callee_method->is_method_handle_intrinsic() ||
              callee_method->is_compiled_lambda_form()) {
       max_inline_level_adjust += 1;  // don't count method handle calls from java.lang.invoke implem
     }
     if (max_inline_level_adjust != 0 && PrintInlining && (Verbose || WizardMode)) {
       CompileTask::print_inline_indent(inline_level());
       tty->print_cr(" \\-> discounting inline depth");
     }
     if (max_inline_level_adjust != 0 && C->log()) {
       int id1 = C->log()->identify(caller_jvms->method());
       int id2 = C->log()->identify(callee_method);
       C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2);
     }
   }
   InlineTree* ilt = new InlineTree(C, this, callee_method, caller_jvms, caller_bci, recur_frequency, _max_inline_level + max_inline_level_adjust);
   _subtrees.append(ilt);
   NOT_PRODUCT( _count_inlines += 1; )
   return ilt;
 }
 //---------------------------------------callee_at-----------------------------
 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const {
   for (int i = 0; i < _subtrees.length(); i++) {
     InlineTree* sub = _subtrees.at(i);
     if (sub->caller_bci() == bci && callee == sub->method()) {
       return sub;
     }
   }
   return NULL;
 }
 //------------------------------build_inline_tree_root-------------------------
 InlineTree *InlineTree::build_inline_tree_root() {
   Compile* C = Compile::current();
   // Root of inline tree
   InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel);
   return ilt;
 }
 //-------------------------find_subtree_from_root-----------------------------
 // Given a jvms, which determines a call chain from the root method,
 // find the corresponding inline tree.
 // Note: This method will be removed or replaced as InlineTree goes away.
 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) {
   InlineTree* iltp = root;
   uint depth = jvms && jvms->has_method() ? jvms->depth() : 0;
   for (uint d = 1; d <= depth; d++) {
     JVMState* jvmsp  = jvms->of_depth(d);
     // Select the corresponding subtree for this bci.
     assert(jvmsp->method() == iltp->method(), "tree still in sync");
     ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method();
     InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee);
     if (sub == NULL) {
       if (d == depth) {
         sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci());
       }
       guarantee(sub != NULL, "should be a sub-ilt here");
       return sub;
     }
     iltp = sub;
   }
   return iltp;
 }
 #ifndef PRODUCT
 void InlineTree::print_impl(outputStream* st, int indent) const {
   for (int i = 0; i < indent; i++) st->print(" ");
   st->print(" @ %d ", caller_bci());
   method()->print_short_name(st);
   st->cr();
   for (int i = 0 ; i < _subtrees.length(); i++) {
     _subtrees.at(i)->print_impl(st, indent + 2);
   }
 }
 void InlineTree::print_value_on(outputStream* st) const {
   print_impl(st, 2);
 }
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/bytecodeInfo.cpp@bd7a7ce2e264 (annotated)

src/share/vm/opto/bytecodeInfo.cpp