jdk8-mips64-public/hotspot: src/share/vm/opto/runtime.cpp@7b0e9cba0307 (annotated)

src/share/vm/opto/runtime.cpp@7b0e9cba0307 (annotated)

src/share/vm/opto/runtime.cpp

Wed, 13 Jan 2010 15:26:39 -0800

author: ysr
date: Wed, 13 Jan 2010 15:26:39 -0800
changeset 1601: 7b0e9cba0307
parent 1577: 4ce7240d622c
child 1641: 87684f1a88b5
child 1648: 6deeaebad47a
permissions: -rw-r--r--

6896647: card marks can be deferred too long
Summary: Deferred card marks are now flushed during the gc prologue. Parallel[Scavege,OldGC] and SerialGC no longer defer card marks generated by COMPILER2 as a result of ReduceInitialCardMarks. For these cases, introduced a diagnostic option to defer the card marks, only for the purposes of testing and diagnostics. CMS and G1 continue to defer card marks. Potential performance concern related to single-threaded flushing of deferred card marks in the gc prologue will be addressed in the future.
Reviewed-by: never, johnc

 /*
  * Copyright 1998-2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 #include "incls/_precompiled.incl"
 #include "incls/_runtime.cpp.incl"
 // For debugging purposes:
 //  To force FullGCALot inside a runtime function, add the following two lines
 //
 //  Universe::release_fullgc_alot_dummy();
 //  MarkSweep::invoke(0, "Debugging");
 //
 // At command line specify the parameters: -XX:+FullGCALot -XX:FullGCALotStart=100000000
 // Compiled code entry points
 address OptoRuntime::_new_instance_Java                           = NULL;
 address OptoRuntime::_new_array_Java                              = NULL;
 address OptoRuntime::_multianewarray2_Java                        = NULL;
 address OptoRuntime::_multianewarray3_Java                        = NULL;
 address OptoRuntime::_multianewarray4_Java                        = NULL;
 address OptoRuntime::_multianewarray5_Java                        = NULL;
 address OptoRuntime::_g1_wb_pre_Java                              = NULL;
 address OptoRuntime::_g1_wb_post_Java                             = NULL;
 address OptoRuntime::_vtable_must_compile_Java                    = NULL;
 address OptoRuntime::_complete_monitor_locking_Java               = NULL;
 address OptoRuntime::_rethrow_Java                                = NULL;
 address OptoRuntime::_slow_arraycopy_Java                         = NULL;
 address OptoRuntime::_register_finalizer_Java                     = NULL;
 # ifdef ENABLE_ZAP_DEAD_LOCALS
 address OptoRuntime::_zap_dead_Java_locals_Java                   = NULL;
 address OptoRuntime::_zap_dead_native_locals_Java                 = NULL;
 # endif
 // This should be called in an assertion at the start of OptoRuntime routines
 // which are entered from compiled code (all of them)
 #ifndef PRODUCT
 static bool check_compiled_frame(JavaThread* thread) {
   assert(thread->last_frame().is_runtime_frame(), "cannot call runtime directly from compiled code");
 #ifdef ASSERT
   RegisterMap map(thread, false);
   frame caller = thread->last_frame().sender(&map);
   assert(caller.is_compiled_frame(), "not being called from compiled like code");
 #endif  /* ASSERT */
   return true;
 }
 #endif
 #define gen(env, var, type_func_gen, c_func, fancy_jump, pass_tls, save_arg_regs, return_pc) \
   var = generate_stub(env, type_func_gen, CAST_FROM_FN_PTR(address, c_func), #var, fancy_jump, pass_tls, save_arg_regs, return_pc)
 void OptoRuntime::generate(ciEnv* env) {
   generate_exception_blob();
   // Note: tls: Means fetching the return oop out of the thread-local storage
   //
   //   variable/name                       type-function-gen              , runtime method                  ,fncy_jp, tls,save_args,retpc
   // -------------------------------------------------------------------------------------------------------------------------------
   gen(env, _new_instance_Java              , new_instance_Type            , new_instance_C                  ,    0 , true , false, false);
   gen(env, _new_array_Java                 , new_array_Type               , new_array_C                     ,    0 , true , false, false);
   gen(env, _multianewarray2_Java           , multianewarray2_Type         , multianewarray2_C               ,    0 , true , false, false);
   gen(env, _multianewarray3_Java           , multianewarray3_Type         , multianewarray3_C               ,    0 , true , false, false);
   gen(env, _multianewarray4_Java           , multianewarray4_Type         , multianewarray4_C               ,    0 , true , false, false);
   gen(env, _multianewarray5_Java           , multianewarray5_Type         , multianewarray5_C               ,    0 , true , false, false);
   gen(env, _g1_wb_pre_Java                 , g1_wb_pre_Type               , SharedRuntime::g1_wb_pre        ,    0 , false, false, false);
   gen(env, _g1_wb_post_Java                , g1_wb_post_Type              , SharedRuntime::g1_wb_post       ,    0 , false, false, false);
   gen(env, _complete_monitor_locking_Java  , complete_monitor_enter_Type  , SharedRuntime::complete_monitor_locking_C      ,    0 , false, false, false);
   gen(env, _rethrow_Java                   , rethrow_Type                 , rethrow_C                       ,    2 , true , false, true );
   gen(env, _slow_arraycopy_Java            , slow_arraycopy_Type          , SharedRuntime::slow_arraycopy_C ,    0 , false, false, false);
   gen(env, _register_finalizer_Java        , register_finalizer_Type      , register_finalizer              ,    0 , false, false, false);
 # ifdef ENABLE_ZAP_DEAD_LOCALS
   gen(env, _zap_dead_Java_locals_Java      , zap_dead_locals_Type         , zap_dead_Java_locals_C          ,    0 , false, true , false );
   gen(env, _zap_dead_native_locals_Java    , zap_dead_locals_Type         , zap_dead_native_locals_C        ,    0 , false, true , false );
 # endif
 }
 #undef gen
 // Helper method to do generation of RunTimeStub's
 address OptoRuntime::generate_stub( ciEnv* env,
                                     TypeFunc_generator gen, address C_function,
                                     const char *name, int is_fancy_jump,
                                     bool pass_tls,
                                     bool save_argument_registers,
                                     bool return_pc ) {
   ResourceMark rm;
   Compile C( env, gen, C_function, name, is_fancy_jump, pass_tls, save_argument_registers, return_pc );
   return  C.stub_entry_point();
 }
 const char* OptoRuntime::stub_name(address entry) {
 #ifndef PRODUCT
   CodeBlob* cb = CodeCache::find_blob(entry);
   RuntimeStub* rs =(RuntimeStub *)cb;
   assert(rs != NULL && rs->is_runtime_stub(), "not a runtime stub");
   return rs->name();
 #else
   // Fast implementation for product mode (maybe it should be inlined too)
   return "runtime stub";
 #endif
 }
 //=============================================================================
 // Opto compiler runtime routines
 //=============================================================================
 //=============================allocation======================================
 // We failed the fast-path allocation.  Now we need to do a scavenge or GC
 // and try allocation again.
 void OptoRuntime::new_store_pre_barrier(JavaThread* thread) {
   // After any safepoint, just before going back to compiled code,
   // we inform the GC that we will be doing initializing writes to
   // this object in the future without emitting card-marks, so
   // GC may take any compensating steps.
   // NOTE: Keep this code consistent with GraphKit::store_barrier.
   oop new_obj = thread->vm_result();
   if (new_obj == NULL)  return;
   assert(Universe::heap()->can_elide_tlab_store_barriers(),
          "compiler must check this first");
   // GC may decide to give back a safer copy of new_obj.
   new_obj = Universe::heap()->new_store_pre_barrier(thread, new_obj);
   thread->set_vm_result(new_obj);
 }
 // object allocation
 JRT_BLOCK_ENTRY(void, OptoRuntime::new_instance_C(klassOopDesc* klass, JavaThread* thread))
   JRT_BLOCK;
 #ifndef PRODUCT
   SharedRuntime::_new_instance_ctr++;         // new instance requires GC
 #endif
   assert(check_compiled_frame(thread), "incorrect caller");
   // These checks are cheap to make and support reflective allocation.
   int lh = Klass::cast(klass)->layout_helper();
   if (Klass::layout_helper_needs_slow_path(lh)
       || !instanceKlass::cast(klass)->is_initialized()) {
     KlassHandle kh(THREAD, klass);
     kh->check_valid_for_instantiation(false, THREAD);
     if (!HAS_PENDING_EXCEPTION) {
       instanceKlass::cast(kh())->initialize(THREAD);
     }
     if (!HAS_PENDING_EXCEPTION) {
       klass = kh();
     } else {
       klass = NULL;
     }
   }
   if (klass != NULL) {
     // Scavenge and allocate an instance.
     oop result = instanceKlass::cast(klass)->allocate_instance(THREAD);
     thread->set_vm_result(result);
     // Pass oops back through thread local storage.  Our apparent type to Java
     // is that we return an oop, but we can block on exit from this routine and
     // a GC can trash the oop in C's return register.  The generated stub will
     // fetch the oop from TLS after any possible GC.
   }
   deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
   JRT_BLOCK_END;
   if (GraphKit::use_ReduceInitialCardMarks()) {
     // inform GC that we won't do card marks for initializing writes.
     new_store_pre_barrier(thread);
   }
 JRT_END
 // array allocation
 JRT_BLOCK_ENTRY(void, OptoRuntime::new_array_C(klassOopDesc* array_type, int len, JavaThread *thread))
   JRT_BLOCK;
 #ifndef PRODUCT
   SharedRuntime::_new_array_ctr++;            // new array requires GC
 #endif
   assert(check_compiled_frame(thread), "incorrect caller");
   // Scavenge and allocate an instance.
   oop result;
   if (Klass::cast(array_type)->oop_is_typeArray()) {
     // The oopFactory likes to work with the element type.
     // (We could bypass the oopFactory, since it doesn't add much value.)
     BasicType elem_type = typeArrayKlass::cast(array_type)->element_type();
     result = oopFactory::new_typeArray(elem_type, len, THREAD);
   } else {
     // Although the oopFactory likes to work with the elem_type,
     // the compiler prefers the array_type, since it must already have
     // that latter value in hand for the fast path.
     klassOopDesc* elem_type = objArrayKlass::cast(array_type)->element_klass();
     result = oopFactory::new_objArray(elem_type, len, THREAD);
   }
   // Pass oops back through thread local storage.  Our apparent type to Java
   // is that we return an oop, but we can block on exit from this routine and
   // a GC can trash the oop in C's return register.  The generated stub will
   // fetch the oop from TLS after any possible GC.
   deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
   thread->set_vm_result(result);
   JRT_BLOCK_END;
   if (GraphKit::use_ReduceInitialCardMarks()) {
     // inform GC that we won't do card marks for initializing writes.
     new_store_pre_barrier(thread);
   }
 JRT_END
 // Note: multianewarray for one dimension is handled inline by GraphKit::new_array.
 // multianewarray for 2 dimensions
 JRT_ENTRY(void, OptoRuntime::multianewarray2_C(klassOopDesc* elem_type, int len1, int len2, JavaThread *thread))
 #ifndef PRODUCT
   SharedRuntime::_multi2_ctr++;                // multianewarray for 1 dimension
 #endif
   assert(check_compiled_frame(thread), "incorrect caller");
   assert(oop(elem_type)->is_klass(), "not a class");
   jint dims[2];
   dims[0] = len1;
   dims[1] = len2;
   oop obj = arrayKlass::cast(elem_type)->multi_allocate(2, dims, THREAD);
   deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
   thread->set_vm_result(obj);
 JRT_END
 // multianewarray for 3 dimensions
 JRT_ENTRY(void, OptoRuntime::multianewarray3_C(klassOopDesc* elem_type, int len1, int len2, int len3, JavaThread *thread))
 #ifndef PRODUCT
   SharedRuntime::_multi3_ctr++;                // multianewarray for 1 dimension
 #endif
   assert(check_compiled_frame(thread), "incorrect caller");
   assert(oop(elem_type)->is_klass(), "not a class");
   jint dims[3];
   dims[0] = len1;
   dims[1] = len2;
   dims[2] = len3;
   oop obj = arrayKlass::cast(elem_type)->multi_allocate(3, dims, THREAD);
   deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
   thread->set_vm_result(obj);
 JRT_END
 // multianewarray for 4 dimensions
 JRT_ENTRY(void, OptoRuntime::multianewarray4_C(klassOopDesc* elem_type, int len1, int len2, int len3, int len4, JavaThread *thread))
 #ifndef PRODUCT
   SharedRuntime::_multi4_ctr++;                // multianewarray for 1 dimension
 #endif
   assert(check_compiled_frame(thread), "incorrect caller");
   assert(oop(elem_type)->is_klass(), "not a class");
   jint dims[4];
   dims[0] = len1;
   dims[1] = len2;
   dims[2] = len3;
   dims[3] = len4;
   oop obj = arrayKlass::cast(elem_type)->multi_allocate(4, dims, THREAD);
   deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
   thread->set_vm_result(obj);
 JRT_END
 // multianewarray for 5 dimensions
 JRT_ENTRY(void, OptoRuntime::multianewarray5_C(klassOopDesc* elem_type, int len1, int len2, int len3, int len4, int len5, JavaThread *thread))
 #ifndef PRODUCT
   SharedRuntime::_multi5_ctr++;                // multianewarray for 1 dimension
 #endif
   assert(check_compiled_frame(thread), "incorrect caller");
   assert(oop(elem_type)->is_klass(), "not a class");
   jint dims[5];
   dims[0] = len1;
   dims[1] = len2;
   dims[2] = len3;
   dims[3] = len4;
   dims[4] = len5;
   oop obj = arrayKlass::cast(elem_type)->multi_allocate(5, dims, THREAD);
   deoptimize_caller_frame(thread, HAS_PENDING_EXCEPTION);
   thread->set_vm_result(obj);
 JRT_END
 const TypeFunc *OptoRuntime::new_instance_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
   // create result type (range)
   fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
   return TypeFunc::make(domain, range);
 }
 const TypeFunc *OptoRuntime::athrow_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Klass to be allocated
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
   // create result type (range)
   fields = TypeTuple::fields(0);
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
   return TypeFunc::make(domain, range);
 }
 const TypeFunc *OptoRuntime::new_array_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL;   // element klass
   fields[TypeFunc::Parms+1] = TypeInt::INT;       // array size
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
   // create result type (range)
   fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
   return TypeFunc::make(domain, range);
 }
 const TypeFunc *OptoRuntime::multianewarray_Type(int ndim) {
   // create input type (domain)
   const int nargs = ndim + 1;
   const Type **fields = TypeTuple::fields(nargs);
   fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL;   // element klass
   for( int i = 1; i < nargs; i++ )
     fields[TypeFunc::Parms + i] = TypeInt::INT;       // array size
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+nargs, fields);
   // create result type (range)
   fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL; // Returned oop
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
   return TypeFunc::make(domain, range);
 }
 const TypeFunc *OptoRuntime::multianewarray2_Type() {
   return multianewarray_Type(2);
 }
 const TypeFunc *OptoRuntime::multianewarray3_Type() {
   return multianewarray_Type(3);
 }
 const TypeFunc *OptoRuntime::multianewarray4_Type() {
   return multianewarray_Type(4);
 }
 const TypeFunc *OptoRuntime::multianewarray5_Type() {
   return multianewarray_Type(5);
 }
 const TypeFunc *OptoRuntime::g1_wb_pre_Type() {
   const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // original field value
   fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL; // thread
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
   // create result type (range)
   fields = TypeTuple::fields(0);
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
   return TypeFunc::make(domain, range);
 }
 const TypeFunc *OptoRuntime::g1_wb_post_Type() {
   const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeRawPtr::NOTNULL;  // Card addr
   fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL;  // thread
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
   // create result type (range)
   fields = TypeTuple::fields(0);
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
   return TypeFunc::make(domain, range);
 }
 const TypeFunc *OptoRuntime::uncommon_trap_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(1);
   // symbolOop name of class to be loaded
   fields[TypeFunc::Parms+0] = TypeInt::INT;
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
   // create result type (range)
   fields = TypeTuple::fields(0);
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0, fields);
   return TypeFunc::make(domain, range);
 }
 # ifdef ENABLE_ZAP_DEAD_LOCALS
 // Type used for stub generation for zap_dead_locals.
 // No inputs or outputs
 const TypeFunc *OptoRuntime::zap_dead_locals_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(0);
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms,fields);
   // create result type (range)
   fields = TypeTuple::fields(0);
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms,fields);
   return TypeFunc::make(domain,range);
 }
 # endif
 //-----------------------------------------------------------------------------
 // Monitor Handling
 const TypeFunc *OptoRuntime::complete_monitor_enter_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL;  // Object to be Locked
   fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM;   // Address of stack location for lock
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
   // create result type (range)
   fields = TypeTuple::fields(0);
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
   return TypeFunc::make(domain,range);
 }
 //-----------------------------------------------------------------------------
 const TypeFunc *OptoRuntime::complete_monitor_exit_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL;  // Object to be Locked
   fields[TypeFunc::Parms+1] = TypeRawPtr::BOTTOM;   // Address of stack location for lock
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
   // create result type (range)
   fields = TypeTuple::fields(0);
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
   return TypeFunc::make(domain,range);
 }
 const TypeFunc* OptoRuntime::flush_windows_Type() {
   // create input type (domain)
   const Type** fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = NULL; // void
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms, fields);
   // create result type
   fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = NULL; // void
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
   return TypeFunc::make(domain, range);
 }
 const TypeFunc* OptoRuntime::l2f_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeLong::LONG;
   fields[TypeFunc::Parms+1] = Type::HALF;
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
   // create result type (range)
   fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = Type::FLOAT;
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
   return TypeFunc::make(domain, range);
 }
 const TypeFunc* OptoRuntime::modf_Type() {
   const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = Type::FLOAT;
   fields[TypeFunc::Parms+1] = Type::FLOAT;
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
   // create result type (range)
   fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = Type::FLOAT;
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
   return TypeFunc::make(domain, range);
 }
 const TypeFunc *OptoRuntime::Math_D_D_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(2);
   // symbolOop name of class to be loaded
   fields[TypeFunc::Parms+0] = Type::DOUBLE;
   fields[TypeFunc::Parms+1] = Type::HALF;
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
   // create result type (range)
   fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = Type::DOUBLE;
   fields[TypeFunc::Parms+1] = Type::HALF;
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
   return TypeFunc::make(domain, range);
 }
 const TypeFunc* OptoRuntime::Math_DD_D_Type() {
   const Type **fields = TypeTuple::fields(4);
   fields[TypeFunc::Parms+0] = Type::DOUBLE;
   fields[TypeFunc::Parms+1] = Type::HALF;
   fields[TypeFunc::Parms+2] = Type::DOUBLE;
   fields[TypeFunc::Parms+3] = Type::HALF;
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+4, fields);
   // create result type (range)
   fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = Type::DOUBLE;
   fields[TypeFunc::Parms+1] = Type::HALF;
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
   return TypeFunc::make(domain, range);
 }
 //-------------- currentTimeMillis
 const TypeFunc* OptoRuntime::current_time_millis_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(0);
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+0, fields);
   // create result type (range)
   fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeLong::LONG;
   fields[TypeFunc::Parms+1] = Type::HALF;
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+2, fields);
   return TypeFunc::make(domain, range);
 }
 // arraycopy stub variations:
 enum ArrayCopyType {
   ac_fast,                      // void(ptr, ptr, size_t)
   ac_checkcast,                 //  int(ptr, ptr, size_t, size_t, ptr)
   ac_slow,                      // void(ptr, int, ptr, int, int)
   ac_generic                    //  int(ptr, int, ptr, int, int)
 };
 static const TypeFunc* make_arraycopy_Type(ArrayCopyType act) {
   // create input type (domain)
   int num_args      = (act == ac_fast ? 3 : 5);
   int num_size_args = (act == ac_fast ? 1 : act == ac_checkcast ? 2 : 0);
   int argcnt = num_args;
   LP64_ONLY(argcnt += num_size_args); // halfwords for lengths
   const Type** fields = TypeTuple::fields(argcnt);
   int argp = TypeFunc::Parms;
   fields[argp++] = TypePtr::NOTNULL;    // src
   if (num_size_args == 0) {
     fields[argp++] = TypeInt::INT;      // src_pos
   }
   fields[argp++] = TypePtr::NOTNULL;    // dest
   if (num_size_args == 0) {
     fields[argp++] = TypeInt::INT;      // dest_pos
     fields[argp++] = TypeInt::INT;      // length
   }
   while (num_size_args-- > 0) {
     fields[argp++] = TypeX_X;               // size in whatevers (size_t)
     LP64_ONLY(fields[argp++] = Type::HALF); // other half of long length
   }
   if (act == ac_checkcast) {
     fields[argp++] = TypePtr::NOTNULL;  // super_klass
   }
   assert(argp == TypeFunc::Parms+argcnt, "correct decoding of act");
   const TypeTuple* domain = TypeTuple::make(TypeFunc::Parms+argcnt, fields);
   // create result type if needed
   int retcnt = (act == ac_checkcast || act == ac_generic ? 1 : 0);
   fields = TypeTuple::fields(1);
   if (retcnt == 0)
     fields[TypeFunc::Parms+0] = NULL; // void
   else
     fields[TypeFunc::Parms+0] = TypeInt::INT; // status result, if needed
   const TypeTuple* range = TypeTuple::make(TypeFunc::Parms+retcnt, fields);
   return TypeFunc::make(domain, range);
 }
 const TypeFunc* OptoRuntime::fast_arraycopy_Type() {
   // This signature is simple:  Two base pointers and a size_t.
   return make_arraycopy_Type(ac_fast);
 }
 const TypeFunc* OptoRuntime::checkcast_arraycopy_Type() {
   // An extension of fast_arraycopy_Type which adds type checking.
   return make_arraycopy_Type(ac_checkcast);
 }
 const TypeFunc* OptoRuntime::slow_arraycopy_Type() {
   // This signature is exactly the same as System.arraycopy.
   // There are no intptr_t (int/long) arguments.
   return make_arraycopy_Type(ac_slow);
 }
 const TypeFunc* OptoRuntime::generic_arraycopy_Type() {
   // This signature is like System.arraycopy, except that it returns status.
   return make_arraycopy_Type(ac_generic);
 }
 //------------- Interpreter state access for on stack replacement
 const TypeFunc* OptoRuntime::osr_end_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // OSR temp buf
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1, fields);
   // create result type
   fields = TypeTuple::fields(1);
   // fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // locked oop
   fields[TypeFunc::Parms+0] = NULL; // void
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
   return TypeFunc::make(domain, range);
 }
 //-------------- methodData update helpers
 const TypeFunc* OptoRuntime::profile_receiver_type_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeAryPtr::NOTNULL;    // methodData pointer
   fields[TypeFunc::Parms+1] = TypeInstPtr::BOTTOM;    // receiver oop
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2, fields);
   // create result type
   fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = NULL; // void
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms, fields);
   return TypeFunc::make(domain,range);
 }
 JRT_LEAF(void, OptoRuntime::profile_receiver_type_C(DataLayout* data, oopDesc* receiver))
   if (receiver == NULL) return;
   klassOop receiver_klass = receiver->klass();
   intptr_t* mdp = ((intptr_t*)(data)) + DataLayout::header_size_in_cells();
   int empty_row = -1;           // free row, if any is encountered
   // ReceiverTypeData* vc = new ReceiverTypeData(mdp);
   for (uint row = 0; row < ReceiverTypeData::row_limit(); row++) {
     // if (vc->receiver(row) == receiver_klass)
     int receiver_off = ReceiverTypeData::receiver_cell_index(row);
     intptr_t row_recv = *(mdp + receiver_off);
     if (row_recv == (intptr_t) receiver_klass) {
       // vc->set_receiver_count(row, vc->receiver_count(row) + DataLayout::counter_increment);
       int count_off = ReceiverTypeData::receiver_count_cell_index(row);
       *(mdp + count_off) += DataLayout::counter_increment;
       return;
     } else if (row_recv == 0) {
       // else if (vc->receiver(row) == NULL)
       empty_row = (int) row;
     }
   }
   if (empty_row != -1) {
     int receiver_off = ReceiverTypeData::receiver_cell_index(empty_row);
     // vc->set_receiver(empty_row, receiver_klass);
     *(mdp + receiver_off) = (intptr_t) receiver_klass;
     // vc->set_receiver_count(empty_row, DataLayout::counter_increment);
     int count_off = ReceiverTypeData::receiver_count_cell_index(empty_row);
     *(mdp + count_off) = DataLayout::counter_increment;
   }
 JRT_END
 //-----------------------------------------------------------------------------
 // implicit exception support.
 static void report_null_exception_in_code_cache(address exception_pc) {
   ResourceMark rm;
   CodeBlob* n = CodeCache::find_blob(exception_pc);
   if (n != NULL) {
     tty->print_cr("#");
     tty->print_cr("# HotSpot Runtime Error, null exception in generated code");
     tty->print_cr("#");
     tty->print_cr("# pc where exception happened = " INTPTR_FORMAT, exception_pc);
     if (n->is_nmethod()) {
       methodOop method = ((nmethod*)n)->method();
       tty->print_cr("# Method where it happened %s.%s ", Klass::cast(method->method_holder())->name()->as_C_string(), method->name()->as_C_string());
       tty->print_cr("#");
       if (ShowMessageBoxOnError && UpdateHotSpotCompilerFileOnError) {
         const char* title    = "HotSpot Runtime Error";
         const char* question = "Do you want to exclude compilation of this method in future runs?";
         if (os::message_box(title, question)) {
           CompilerOracle::append_comment_to_file("");
           CompilerOracle::append_comment_to_file("Null exception in compiled code resulted in the following exclude");
           CompilerOracle::append_comment_to_file("");
           CompilerOracle::append_exclude_to_file(method);
           tty->print_cr("#");
           tty->print_cr("# %s has been updated to exclude the specified method", CompileCommandFile);
           tty->print_cr("#");
         }
       }
       fatal("Implicit null exception happened in compiled method");
     } else {
       n->print();
       fatal("Implicit null exception happened in generated stub");
     }
   }
   fatal("Implicit null exception at wrong place");
 }
 //-------------------------------------------------------------------------------------
 // register policy
 bool OptoRuntime::is_callee_saved_register(MachRegisterNumbers reg) {
   assert(reg >= 0 && reg < _last_Mach_Reg, "must be a machine register");
   switch (register_save_policy[reg]) {
     case 'C': return false; //SOC
     case 'E': return true ; //SOE
     case 'N': return false; //NS
     case 'A': return false; //AS
   }
   ShouldNotReachHere();
   return false;
 }
 //-----------------------------------------------------------------------
 // Exceptions
 //
 static void trace_exception(oop exception_oop, address exception_pc, const char* msg) PRODUCT_RETURN;
 // The method is an entry that is always called by a C++ method not
 // directly from compiled code. Compiled code will call the C++ method following.
 // We can't allow async exception to be installed during  exception processing.
 JRT_ENTRY_NO_ASYNC(address, OptoRuntime::handle_exception_C_helper(JavaThread* thread, nmethod* &nm))
   // Do not confuse exception_oop with pending_exception. The exception_oop
   // is only used to pass arguments into the method. Not for general
   // exception handling.  DO NOT CHANGE IT to use pending_exception, since
   // the runtime stubs checks this on exit.
   assert(thread->exception_oop() != NULL, "exception oop is found");
   address handler_address = NULL;
   Handle exception(thread, thread->exception_oop());
   if (TraceExceptions) {
     trace_exception(exception(), thread->exception_pc(), "");
   }
   // for AbortVMOnException flag
   NOT_PRODUCT(Exceptions::debug_check_abort(exception));
   #ifdef ASSERT
     if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
       // should throw an exception here
       ShouldNotReachHere();
     }
   #endif
   // new exception handling: this method is entered only from adapters
   // exceptions from compiled java methods are handled in compiled code
   // using rethrow node
   address pc = thread->exception_pc();
   nm = CodeCache::find_nmethod(pc);
   assert(nm != NULL, "No NMethod found");
   if (nm->is_native_method()) {
     fatal("Native mathod should not have path to exception handling");
   } else {
     // we are switching to old paradigm: search for exception handler in caller_frame
     // instead in exception handler of caller_frame.sender()
     if (JvmtiExport::can_post_exceptions()) {
       // "Full-speed catching" is not necessary here,
       // since we're notifying the VM on every catch.
       // Force deoptimization and the rest of the lookup
       // will be fine.
       deoptimize_caller_frame(thread, true);
     }
     // Check the stack guard pages.  If enabled, look for handler in this frame;
     // otherwise, forcibly unwind the frame.
     //
     // 4826555: use default current sp for reguard_stack instead of &nm: it's more accurate.
     bool force_unwind = !thread->reguard_stack();
     bool deopting = false;
     if (nm->is_deopt_pc(pc)) {
       deopting = true;
       RegisterMap map(thread, false);
       frame deoptee = thread->last_frame().sender(&map);
       assert(deoptee.is_deoptimized_frame(), "must be deopted");
       // Adjust the pc back to the original throwing pc
       pc = deoptee.pc();
     }
     // If we are forcing an unwind because of stack overflow then deopt is
     // irrelevant sice we are throwing the frame away anyway.
     if (deopting && !force_unwind) {
       handler_address = SharedRuntime::deopt_blob()->unpack_with_exception();
     } else {
       handler_address =
         force_unwind ? NULL : nm->handler_for_exception_and_pc(exception, pc);
       if (handler_address == NULL) {
         handler_address = SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true);
         assert (handler_address != NULL, "must have compiled handler");
         // Update the exception cache only when the unwind was not forced.
         if (!force_unwind) {
           nm->add_handler_for_exception_and_pc(exception,pc,handler_address);
         }
       } else {
         assert(handler_address == SharedRuntime::compute_compiled_exc_handler(nm, pc, exception, force_unwind, true), "Must be the same");
       }
     }
     thread->set_exception_pc(pc);
     thread->set_exception_handler_pc(handler_address);
     thread->set_exception_stack_size(0);
     // Check if the exception PC is a MethodHandle call.
     thread->set_is_method_handle_exception(nm->is_method_handle_return(pc));
   }
   // Restore correct return pc.  Was saved above.
   thread->set_exception_oop(exception());
   return handler_address;
 JRT_END
 // We are entering here from exception_blob
 // If there is a compiled exception handler in this method, we will continue there;
 // otherwise we will unwind the stack and continue at the caller of top frame method
 // Note we enter without the usual JRT wrapper. We will call a helper routine that
 // will do the normal VM entry. We do it this way so that we can see if the nmethod
 // we looked up the handler for has been deoptimized in the meantime. If it has been
 // we must not use the handler and instread return the deopt blob.
 address OptoRuntime::handle_exception_C(JavaThread* thread) {
 //
 // We are in Java not VM and in debug mode we have a NoHandleMark
 //
 #ifndef PRODUCT
   SharedRuntime::_find_handler_ctr++;          // find exception handler
 #endif
   debug_only(NoHandleMark __hm;)
   nmethod* nm = NULL;
   address handler_address = NULL;
   {
     // Enter the VM
     ResetNoHandleMark rnhm;
     handler_address = handle_exception_C_helper(thread, nm);
   }
   // Back in java: Use no oops, DON'T safepoint
   // Now check to see if the handler we are returning is in a now
   // deoptimized frame
   if (nm != NULL) {
     RegisterMap map(thread, false);
     frame caller = thread->last_frame().sender(&map);
 #ifdef ASSERT
     assert(caller.is_compiled_frame(), "must be");
 #endif // ASSERT
     if (caller.is_deoptimized_frame()) {
       handler_address = SharedRuntime::deopt_blob()->unpack_with_exception();
     }
   }
   return handler_address;
 }
 //------------------------------rethrow----------------------------------------
 // We get here after compiled code has executed a 'RethrowNode'.  The callee
 // is either throwing or rethrowing an exception.  The callee-save registers
 // have been restored, synchronized objects have been unlocked and the callee
 // stack frame has been removed.  The return address was passed in.
 // Exception oop is passed as the 1st argument.  This routine is then called
 // from the stub.  On exit, we know where to jump in the caller's code.
 // After this C code exits, the stub will pop his frame and end in a jump
 // (instead of a return).  We enter the caller's default handler.
 //
 // This must be JRT_LEAF:
 //     - caller will not change its state as we cannot block on exit,
 //       therefore raw_exception_handler_for_return_address is all it takes
 //       to handle deoptimized blobs
 //
 // However, there needs to be a safepoint check in the middle!  So compiled
 // safepoints are completely watertight.
 //
 // Thus, it cannot be a leaf since it contains the No_GC_Verifier.
 //
 // *THIS IS NOT RECOMMENDED PROGRAMMING STYLE*
 //
 address OptoRuntime::rethrow_C(oopDesc* exception, JavaThread* thread, address ret_pc) {
 #ifndef PRODUCT
   SharedRuntime::_rethrow_ctr++;               // count rethrows
 #endif
   assert (exception != NULL, "should have thrown a NULLPointerException");
 #ifdef ASSERT
   if (!(exception->is_a(SystemDictionary::Throwable_klass()))) {
     // should throw an exception here
     ShouldNotReachHere();
   }
 #endif
   thread->set_vm_result(exception);
   // Frame not compiled (handles deoptimization blob)
   return SharedRuntime::raw_exception_handler_for_return_address(ret_pc);
 }
 const TypeFunc *OptoRuntime::rethrow_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields);
   // create result type (range)
   fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL; // Exception oop
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+1, fields);
   return TypeFunc::make(domain, range);
 }
 void OptoRuntime::deoptimize_caller_frame(JavaThread *thread, bool doit) {
   // Deoptimize frame
   if (doit) {
     // Called from within the owner thread, so no need for safepoint
     RegisterMap reg_map(thread);
     frame stub_frame = thread->last_frame();
     assert(stub_frame.is_runtime_frame() || exception_blob()->contains(stub_frame.pc()), "sanity check");
     frame caller_frame = stub_frame.sender(&reg_map);
     VM_DeoptimizeFrame deopt(thread, caller_frame.id());
     VMThread::execute(&deopt);
   }
 }
 const TypeFunc *OptoRuntime::register_finalizer_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(1);
   fields[TypeFunc::Parms+0] = TypeInstPtr::NOTNULL;  // oop;          Receiver
   // // The JavaThread* is passed to each routine as the last argument
   // fields[TypeFunc::Parms+1] = TypeRawPtr::NOTNULL;  // JavaThread *; Executing thread
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+1,fields);
   // create result type (range)
   fields = TypeTuple::fields(0);
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
   return TypeFunc::make(domain,range);
 }
 //-----------------------------------------------------------------------------
 // Dtrace support.  entry and exit probes have the same signature
 const TypeFunc *OptoRuntime::dtrace_method_entry_exit_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage
   fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL;  // methodOop;    Method we are entering
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
   // create result type (range)
   fields = TypeTuple::fields(0);
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
   return TypeFunc::make(domain,range);
 }
 const TypeFunc *OptoRuntime::dtrace_object_alloc_Type() {
   // create input type (domain)
   const Type **fields = TypeTuple::fields(2);
   fields[TypeFunc::Parms+0] = TypeRawPtr::BOTTOM; // Thread-local storage
   fields[TypeFunc::Parms+1] = TypeInstPtr::NOTNULL;  // oop;    newly allocated object
   const TypeTuple *domain = TypeTuple::make(TypeFunc::Parms+2,fields);
   // create result type (range)
   fields = TypeTuple::fields(0);
   const TypeTuple *range = TypeTuple::make(TypeFunc::Parms+0,fields);
   return TypeFunc::make(domain,range);
 }
 JRT_ENTRY_NO_ASYNC(void, OptoRuntime::register_finalizer(oopDesc* obj, JavaThread* thread))
   assert(obj->is_oop(), "must be a valid oop");
   assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise");
   instanceKlass::register_finalizer(instanceOop(obj), CHECK);
 JRT_END
 //-----------------------------------------------------------------------------
 NamedCounter * volatile OptoRuntime::_named_counters = NULL;
 //
 // dump the collected NamedCounters.
 //
 void OptoRuntime::print_named_counters() {
   int total_lock_count = 0;
   int eliminated_lock_count = 0;
   NamedCounter* c = _named_counters;
   while (c) {
     if (c->tag() == NamedCounter::LockCounter || c->tag() == NamedCounter::EliminatedLockCounter) {
       int count = c->count();
       if (count > 0) {
         bool eliminated = c->tag() == NamedCounter::EliminatedLockCounter;
         if (Verbose) {
           tty->print_cr("%d %s%s", count, c->name(), eliminated ? " (eliminated)" : "");
         }
         total_lock_count += count;
         if (eliminated) {
           eliminated_lock_count += count;
         }
       }
     } else if (c->tag() == NamedCounter::BiasedLockingCounter) {
       BiasedLockingCounters* blc = ((BiasedLockingNamedCounter*)c)->counters();
       if (blc->nonzero()) {
         tty->print_cr("%s", c->name());
         blc->print_on(tty);
       }
     }
     c = c->next();
   }
   if (total_lock_count > 0) {
     tty->print_cr("dynamic locks: %d", total_lock_count);
     if (eliminated_lock_count) {
       tty->print_cr("eliminated locks: %d (%d%%)", eliminated_lock_count,
                     (int)(eliminated_lock_count * 100.0 / total_lock_count));
     }
   }
 }
 //
 //  Allocate a new NamedCounter.  The JVMState is used to generate the
 //  name which consists of method@line for the inlining tree.
 //
 NamedCounter* OptoRuntime::new_named_counter(JVMState* youngest_jvms, NamedCounter::CounterTag tag) {
   int max_depth = youngest_jvms->depth();
   // Visit scopes from youngest to oldest.
   bool first = true;
   stringStream st;
   for (int depth = max_depth; depth >= 1; depth--) {
     JVMState* jvms = youngest_jvms->of_depth(depth);
     ciMethod* m = jvms->has_method() ? jvms->method() : NULL;
     if (!first) {
       st.print(" ");
     } else {
       first = false;
     }
     int bci = jvms->bci();
     if (bci < 0) bci = 0;
     st.print("%s.%s@%d", m->holder()->name()->as_utf8(), m->name()->as_utf8(), bci);
     // To print linenumbers instead of bci use: m->line_number_from_bci(bci)
   }
   NamedCounter* c;
   if (tag == NamedCounter::BiasedLockingCounter) {
     c = new BiasedLockingNamedCounter(strdup(st.as_string()));
   } else {
     c = new NamedCounter(strdup(st.as_string()), tag);
   }
   // atomically add the new counter to the head of the list.  We only
   // add counters so this is safe.
   NamedCounter* head;
   do {
     head = _named_counters;
     c->set_next(head);
   } while (Atomic::cmpxchg_ptr(c, &_named_counters, head) != head);
   return c;
 }
 //-----------------------------------------------------------------------------
 // Non-product code
 #ifndef PRODUCT
 int trace_exception_counter = 0;
 static void trace_exception(oop exception_oop, address exception_pc, const char* msg) {
   ttyLocker ttyl;
   trace_exception_counter++;
   tty->print("%d [Exception (%s): ", trace_exception_counter, msg);
   exception_oop->print_value();
   tty->print(" in ");
   CodeBlob* blob = CodeCache::find_blob(exception_pc);
   if (blob->is_nmethod()) {
     ((nmethod*)blob)->method()->print_value();
   } else if (blob->is_runtime_stub()) {
     tty->print("<runtime-stub>");
   } else {
     tty->print("<unknown>");
   }
   tty->print(" at " INTPTR_FORMAT,  exception_pc);
   tty->print_cr("]");
 }
 #endif  // PRODUCT
 # ifdef ENABLE_ZAP_DEAD_LOCALS
 // Called from call sites in compiled code with oop maps (actually safepoints)
 // Zaps dead locals in first java frame.
 // Is entry because may need to lock to generate oop maps
 // Currently, only used for compiler frames, but someday may be used
 // for interpreter frames, too.
 int OptoRuntime::ZapDeadCompiledLocals_count = 0;
 // avoid pointers to member funcs with these helpers
 static bool is_java_frame(  frame* f) { return f->is_java_frame();   }
 static bool is_native_frame(frame* f) { return f->is_native_frame(); }
 void OptoRuntime::zap_dead_java_or_native_locals(JavaThread* thread,
                                                 bool (*is_this_the_right_frame_to_zap)(frame*)) {
   assert(JavaThread::current() == thread, "is this needed?");
   if ( !ZapDeadCompiledLocals )  return;
   bool skip = false;
        if ( ZapDeadCompiledLocalsFirst  ==  0  ) ; // nothing special
   else if ( ZapDeadCompiledLocalsFirst  >  ZapDeadCompiledLocals_count )  skip = true;
   else if ( ZapDeadCompiledLocalsFirst  == ZapDeadCompiledLocals_count )
     warning("starting zapping after skipping");
        if ( ZapDeadCompiledLocalsLast  ==  -1  ) ; // nothing special
   else if ( ZapDeadCompiledLocalsLast  <   ZapDeadCompiledLocals_count )  skip = true;
   else if ( ZapDeadCompiledLocalsLast  ==  ZapDeadCompiledLocals_count )
     warning("about to zap last zap");
   ++ZapDeadCompiledLocals_count; // counts skipped zaps, too
   if ( skip )  return;
   // find java frame and zap it
   for (StackFrameStream sfs(thread);  !sfs.is_done();  sfs.next()) {
     if (is_this_the_right_frame_to_zap(sfs.current()) ) {
       sfs.current()->zap_dead_locals(thread, sfs.register_map());
       return;
     }
   }
   warning("no frame found to zap in zap_dead_Java_locals_C");
 }
 JRT_LEAF(void, OptoRuntime::zap_dead_Java_locals_C(JavaThread* thread))
   zap_dead_java_or_native_locals(thread, is_java_frame);
 JRT_END
 // The following does not work because for one thing, the
 // thread state is wrong; it expects java, but it is native.
 // Also, the invariants in a native stub are different and
 // I'm not sure it is safe to have a MachCalRuntimeDirectNode
 // in there.
 // So for now, we do not zap in native stubs.
 JRT_LEAF(void, OptoRuntime::zap_dead_native_locals_C(JavaThread* thread))
   zap_dead_java_or_native_locals(thread, is_native_frame);
 JRT_END
 # endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/opto/runtime.cpp@7b0e9cba0307 (annotated)

src/share/vm/opto/runtime.cpp