jdk8-mips64-public/hotspot: src/share/vm/interpreter/templateInterpreter.cpp@f90c822e73f8 (annotated)

src/share/vm/interpreter/templateInterpreter.cpp@f90c822e73f8 (annotated)

src/share/vm/interpreter/templateInterpreter.cpp

Wed, 27 Apr 2016 01:25:04 +0800

author: aoqi
date: Wed, 27 Apr 2016 01:25:04 +0800
changeset 0: f90c822e73f8
child 6876: 710a3c8b516e
permissions: -rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

 /*
  * Copyright (c) 1997, 2014, 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 "interpreter/interpreter.hpp"
 #include "interpreter/interpreterGenerator.hpp"
 #include "interpreter/interpreterRuntime.hpp"
 #include "interpreter/templateTable.hpp"
 #ifndef CC_INTERP
 # define __ _masm->
 void TemplateInterpreter::initialize() {
   if (_code != NULL) return;
   // assertions
   assert((int)Bytecodes::number_of_codes <= (int)DispatchTable::length,
          "dispatch table too small");
   AbstractInterpreter::initialize();
   TemplateTable::initialize();
   // generate interpreter
   { ResourceMark rm;
     TraceTime timer("Interpreter generation", TraceStartupTime);
     int code_size = InterpreterCodeSize;
     NOT_PRODUCT(code_size *= 4;)  // debug uses extra interpreter code space
     _code = new StubQueue(new InterpreterCodeletInterface, code_size, NULL,
                           "Interpreter");
     InterpreterGenerator g(_code);
     if (PrintInterpreter) print();
   }
   // initialize dispatch table
   _active_table = _normal_table;
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Implementation of EntryPoint
 EntryPoint::EntryPoint() {
   assert(number_of_states == 9, "check the code below");
   _entry[btos] = NULL;
   _entry[ctos] = NULL;
   _entry[stos] = NULL;
   _entry[atos] = NULL;
   _entry[itos] = NULL;
   _entry[ltos] = NULL;
   _entry[ftos] = NULL;
   _entry[dtos] = NULL;
   _entry[vtos] = NULL;
 }
 EntryPoint::EntryPoint(address bentry, address centry, address sentry, address aentry, address ientry, address lentry, address fentry, address dentry, address ventry) {
   assert(number_of_states == 9, "check the code below");
   _entry[btos] = bentry;
   _entry[ctos] = centry;
   _entry[stos] = sentry;
   _entry[atos] = aentry;
   _entry[itos] = ientry;
   _entry[ltos] = lentry;
   _entry[ftos] = fentry;
   _entry[dtos] = dentry;
   _entry[vtos] = ventry;
 }
 void EntryPoint::set_entry(TosState state, address entry) {
   assert(0 <= state && state < number_of_states, "state out of bounds");
   _entry[state] = entry;
 }
 address EntryPoint::entry(TosState state) const {
   assert(0 <= state && state < number_of_states, "state out of bounds");
   return _entry[state];
 }
 void EntryPoint::print() {
   tty->print("[");
   for (int i = 0; i < number_of_states; i++) {
     if (i > 0) tty->print(", ");
     tty->print(INTPTR_FORMAT, p2i(_entry[i]));
   }
   tty->print("]");
 }
 bool EntryPoint::operator == (const EntryPoint& y) {
   int i = number_of_states;
   while (i-- > 0) {
     if (_entry[i] != y._entry[i]) return false;
   }
   return true;
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Implementation of DispatchTable
 EntryPoint DispatchTable::entry(int i) const {
   assert(0 <= i && i < length, "index out of bounds");
   return
     EntryPoint(
       _table[btos][i],
       _table[ctos][i],
       _table[stos][i],
       _table[atos][i],
       _table[itos][i],
       _table[ltos][i],
       _table[ftos][i],
       _table[dtos][i],
       _table[vtos][i]
     );
 }
 void DispatchTable::set_entry(int i, EntryPoint& entry) {
   assert(0 <= i && i < length, "index out of bounds");
   assert(number_of_states == 9, "check the code below");
   _table[btos][i] = entry.entry(btos);
   _table[ctos][i] = entry.entry(ctos);
   _table[stos][i] = entry.entry(stos);
   _table[atos][i] = entry.entry(atos);
   _table[itos][i] = entry.entry(itos);
   _table[ltos][i] = entry.entry(ltos);
   _table[ftos][i] = entry.entry(ftos);
   _table[dtos][i] = entry.entry(dtos);
   _table[vtos][i] = entry.entry(vtos);
 }
 bool DispatchTable::operator == (DispatchTable& y) {
   int i = length;
   while (i-- > 0) {
     EntryPoint t = y.entry(i); // for compiler compatibility (BugId 4150096)
     if (!(entry(i) == t)) return false;
   }
   return true;
 }
 address    TemplateInterpreter::_remove_activation_entry                    = NULL;
 address    TemplateInterpreter::_remove_activation_preserving_args_entry    = NULL;
 address    TemplateInterpreter::_throw_ArrayIndexOutOfBoundsException_entry = NULL;
 address    TemplateInterpreter::_throw_ArrayStoreException_entry            = NULL;
 address    TemplateInterpreter::_throw_ArithmeticException_entry            = NULL;
 address    TemplateInterpreter::_throw_ClassCastException_entry             = NULL;
 address    TemplateInterpreter::_throw_NullPointerException_entry           = NULL;
 address    TemplateInterpreter::_throw_StackOverflowError_entry             = NULL;
 address    TemplateInterpreter::_throw_exception_entry                      = NULL;
 #ifndef PRODUCT
 EntryPoint TemplateInterpreter::_trace_code;
 #endif // !PRODUCT
 EntryPoint TemplateInterpreter::_return_entry[TemplateInterpreter::number_of_return_entries];
 EntryPoint TemplateInterpreter::_earlyret_entry;
 EntryPoint TemplateInterpreter::_deopt_entry [TemplateInterpreter::number_of_deopt_entries ];
 EntryPoint TemplateInterpreter::_continuation_entry;
 EntryPoint TemplateInterpreter::_safept_entry;
 address TemplateInterpreter::_invoke_return_entry[TemplateInterpreter::number_of_return_addrs];
 address TemplateInterpreter::_invokeinterface_return_entry[TemplateInterpreter::number_of_return_addrs];
 address TemplateInterpreter::_invokedynamic_return_entry[TemplateInterpreter::number_of_return_addrs];
 DispatchTable TemplateInterpreter::_active_table;
 DispatchTable TemplateInterpreter::_normal_table;
 DispatchTable TemplateInterpreter::_safept_table;
 address    TemplateInterpreter::_wentry_point[DispatchTable::length];
 TemplateInterpreterGenerator::TemplateInterpreterGenerator(StubQueue* _code): AbstractInterpreterGenerator(_code) {
   _unimplemented_bytecode    = NULL;
   _illegal_bytecode_sequence = NULL;
 }
 static const BasicType types[Interpreter::number_of_result_handlers] = {
   T_BOOLEAN,
   T_CHAR   ,
   T_BYTE   ,
   T_SHORT  ,
   T_INT    ,
   T_LONG   ,
   T_VOID   ,
   T_FLOAT  ,
   T_DOUBLE ,
   T_OBJECT
 };
 void TemplateInterpreterGenerator::generate_all() {
   AbstractInterpreterGenerator::generate_all();
   { CodeletMark cm(_masm, "error exits");
     _unimplemented_bytecode    = generate_error_exit("unimplemented bytecode");
     _illegal_bytecode_sequence = generate_error_exit("illegal bytecode sequence - method not verified");
   }
 #ifndef PRODUCT
   if (TraceBytecodes) {
     CodeletMark cm(_masm, "bytecode tracing support");
     Interpreter::_trace_code =
       EntryPoint(
         generate_trace_code(btos),
         generate_trace_code(ctos),
         generate_trace_code(stos),
         generate_trace_code(atos),
         generate_trace_code(itos),
         generate_trace_code(ltos),
         generate_trace_code(ftos),
         generate_trace_code(dtos),
         generate_trace_code(vtos)
       );
   }
 #endif // !PRODUCT
   { CodeletMark cm(_masm, "return entry points");
     const int index_size = sizeof(u2);
     for (int i = 0; i < Interpreter::number_of_return_entries; i++) {
       Interpreter::_return_entry[i] =
         EntryPoint(
           generate_return_entry_for(itos, i, index_size),
           generate_return_entry_for(itos, i, index_size),
           generate_return_entry_for(itos, i, index_size),
           generate_return_entry_for(atos, i, index_size),
           generate_return_entry_for(itos, i, index_size),
           generate_return_entry_for(ltos, i, index_size),
           generate_return_entry_for(ftos, i, index_size),
           generate_return_entry_for(dtos, i, index_size),
           generate_return_entry_for(vtos, i, index_size)
         );
     }
   }
   { CodeletMark cm(_masm, "invoke return entry points");
     const TosState states[] = {itos, itos, itos, itos, ltos, ftos, dtos, atos, vtos};
     const int invoke_length = Bytecodes::length_for(Bytecodes::_invokestatic);
     const int invokeinterface_length = Bytecodes::length_for(Bytecodes::_invokeinterface);
     const int invokedynamic_length = Bytecodes::length_for(Bytecodes::_invokedynamic);
     for (int i = 0; i < Interpreter::number_of_return_addrs; i++) {
       TosState state = states[i];
       Interpreter::_invoke_return_entry[i] = generate_return_entry_for(state, invoke_length, sizeof(u2));
       Interpreter::_invokeinterface_return_entry[i] = generate_return_entry_for(state, invokeinterface_length, sizeof(u2));
       Interpreter::_invokedynamic_return_entry[i] = generate_return_entry_for(state, invokedynamic_length, sizeof(u4));
     }
   }
   { CodeletMark cm(_masm, "earlyret entry points");
     Interpreter::_earlyret_entry =
       EntryPoint(
         generate_earlyret_entry_for(btos),
         generate_earlyret_entry_for(ctos),
         generate_earlyret_entry_for(stos),
         generate_earlyret_entry_for(atos),
         generate_earlyret_entry_for(itos),
         generate_earlyret_entry_for(ltos),
         generate_earlyret_entry_for(ftos),
         generate_earlyret_entry_for(dtos),
         generate_earlyret_entry_for(vtos)
       );
   }
   { CodeletMark cm(_masm, "deoptimization entry points");
     for (int i = 0; i < Interpreter::number_of_deopt_entries; i++) {
       Interpreter::_deopt_entry[i] =
         EntryPoint(
           generate_deopt_entry_for(itos, i),
           generate_deopt_entry_for(itos, i),
           generate_deopt_entry_for(itos, i),
           generate_deopt_entry_for(atos, i),
           generate_deopt_entry_for(itos, i),
           generate_deopt_entry_for(ltos, i),
           generate_deopt_entry_for(ftos, i),
           generate_deopt_entry_for(dtos, i),
           generate_deopt_entry_for(vtos, i)
         );
     }
   }
   { CodeletMark cm(_masm, "result handlers for native calls");
     // The various result converter stublets.
     int is_generated[Interpreter::number_of_result_handlers];
     memset(is_generated, 0, sizeof(is_generated));
     for (int i = 0; i < Interpreter::number_of_result_handlers; i++) {
       BasicType type = types[i];
       if (!is_generated[Interpreter::BasicType_as_index(type)]++) {
         Interpreter::_native_abi_to_tosca[Interpreter::BasicType_as_index(type)] = generate_result_handler_for(type);
       }
     }
   }
   { CodeletMark cm(_masm, "continuation entry points");
     Interpreter::_continuation_entry =
       EntryPoint(
         generate_continuation_for(btos),
         generate_continuation_for(ctos),
         generate_continuation_for(stos),
         generate_continuation_for(atos),
         generate_continuation_for(itos),
         generate_continuation_for(ltos),
         generate_continuation_for(ftos),
         generate_continuation_for(dtos),
         generate_continuation_for(vtos)
       );
   }
   { CodeletMark cm(_masm, "safepoint entry points");
     Interpreter::_safept_entry =
       EntryPoint(
         generate_safept_entry_for(btos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)),
         generate_safept_entry_for(ctos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)),
         generate_safept_entry_for(stos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)),
         generate_safept_entry_for(atos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)),
         generate_safept_entry_for(itos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)),
         generate_safept_entry_for(ltos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)),
         generate_safept_entry_for(ftos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)),
         generate_safept_entry_for(dtos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint)),
         generate_safept_entry_for(vtos, CAST_FROM_FN_PTR(address, InterpreterRuntime::at_safepoint))
       );
   }
   { CodeletMark cm(_masm, "exception handling");
     // (Note: this is not safepoint safe because thread may return to compiled code)
     generate_throw_exception();
   }
   { CodeletMark cm(_masm, "throw exception entrypoints");
     Interpreter::_throw_ArrayIndexOutOfBoundsException_entry = generate_ArrayIndexOutOfBounds_handler("java/lang/ArrayIndexOutOfBoundsException");
     Interpreter::_throw_ArrayStoreException_entry            = generate_klass_exception_handler("java/lang/ArrayStoreException"                 );
     Interpreter::_throw_ArithmeticException_entry            = generate_exception_handler("java/lang/ArithmeticException"           , "/ by zero");
     Interpreter::_throw_ClassCastException_entry             = generate_ClassCastException_handler();
     Interpreter::_throw_NullPointerException_entry           = generate_exception_handler("java/lang/NullPointerException"          , NULL       );
     Interpreter::_throw_StackOverflowError_entry             = generate_StackOverflowError_handler();
   }
 #define method_entry(kind)                                                                    \
   { CodeletMark cm(_masm, "method entry point (kind = " #kind ")");                    \
     Interpreter::_entry_table[Interpreter::kind] = generate_method_entry(Interpreter::kind);  \
   }
   // all non-native method kinds
   method_entry(zerolocals)
   method_entry(zerolocals_synchronized)
   method_entry(empty)
   method_entry(accessor)
   method_entry(abstract)
   method_entry(java_lang_math_sin  )
   method_entry(java_lang_math_cos  )
   method_entry(java_lang_math_tan  )
   method_entry(java_lang_math_abs  )
   method_entry(java_lang_math_sqrt )
   method_entry(java_lang_math_log  )
   method_entry(java_lang_math_log10)
   method_entry(java_lang_math_exp  )
   method_entry(java_lang_math_pow  )
   method_entry(java_lang_ref_reference_get)
   if (UseCRC32Intrinsics) {
     method_entry(java_util_zip_CRC32_update)
     method_entry(java_util_zip_CRC32_updateBytes)
     method_entry(java_util_zip_CRC32_updateByteBuffer)
   }
   initialize_method_handle_entries();
   // all native method kinds (must be one contiguous block)
   Interpreter::_native_entry_begin = Interpreter::code()->code_end();
   method_entry(native)
   method_entry(native_synchronized)
   Interpreter::_native_entry_end = Interpreter::code()->code_end();
 #undef method_entry
   // Bytecodes
   set_entry_points_for_all_bytes();
   set_safepoints_for_all_bytes();
 }
 //------------------------------------------------------------------------------------------------------------------------
 address TemplateInterpreterGenerator::generate_error_exit(const char* msg) {
   address entry = __ pc();
   __ stop(msg);
   return entry;
 }
 //------------------------------------------------------------------------------------------------------------------------
 void TemplateInterpreterGenerator::set_entry_points_for_all_bytes() {
   for (int i = 0; i < DispatchTable::length; i++) {
     Bytecodes::Code code = (Bytecodes::Code)i;
     if (Bytecodes::is_defined(code)) {
       set_entry_points(code);
     } else {
       set_unimplemented(i);
     }
   }
 }
 void TemplateInterpreterGenerator::set_safepoints_for_all_bytes() {
   for (int i = 0; i < DispatchTable::length; i++) {
     Bytecodes::Code code = (Bytecodes::Code)i;
     if (Bytecodes::is_defined(code)) Interpreter::_safept_table.set_entry(code, Interpreter::_safept_entry);
   }
 }
 void TemplateInterpreterGenerator::set_unimplemented(int i) {
   address e = _unimplemented_bytecode;
   EntryPoint entry(e, e, e, e, e, e, e, e, e);
   Interpreter::_normal_table.set_entry(i, entry);
   Interpreter::_wentry_point[i] = _unimplemented_bytecode;
 }
 void TemplateInterpreterGenerator::set_entry_points(Bytecodes::Code code) {
   CodeletMark cm(_masm, Bytecodes::name(code), code);
   // initialize entry points
   assert(_unimplemented_bytecode    != NULL, "should have been generated before");
   assert(_illegal_bytecode_sequence != NULL, "should have been generated before");
   address bep = _illegal_bytecode_sequence;
   address cep = _illegal_bytecode_sequence;
   address sep = _illegal_bytecode_sequence;
   address aep = _illegal_bytecode_sequence;
   address iep = _illegal_bytecode_sequence;
   address lep = _illegal_bytecode_sequence;
   address fep = _illegal_bytecode_sequence;
   address dep = _illegal_bytecode_sequence;
   address vep = _unimplemented_bytecode;
   address wep = _unimplemented_bytecode;
   // code for short & wide version of bytecode
   if (Bytecodes::is_defined(code)) {
     Template* t = TemplateTable::template_for(code);
     assert(t->is_valid(), "just checking");
     set_short_entry_points(t, bep, cep, sep, aep, iep, lep, fep, dep, vep);
   }
   if (Bytecodes::wide_is_defined(code)) {
     Template* t = TemplateTable::template_for_wide(code);
     assert(t->is_valid(), "just checking");
     set_wide_entry_point(t, wep);
   }
   // set entry points
   EntryPoint entry(bep, cep, sep, aep, iep, lep, fep, dep, vep);
   Interpreter::_normal_table.set_entry(code, entry);
   Interpreter::_wentry_point[code] = wep;
 }
 void TemplateInterpreterGenerator::set_wide_entry_point(Template* t, address& wep) {
   assert(t->is_valid(), "template must exist");
   assert(t->tos_in() == vtos, "only vtos tos_in supported for wide instructions");
   wep = __ pc(); generate_and_dispatch(t);
 }
 void TemplateInterpreterGenerator::set_short_entry_points(Template* t, address& bep, address& cep, address& sep, address& aep, address& iep, address& lep, address& fep, address& dep, address& vep) {
   assert(t->is_valid(), "template must exist");
   switch (t->tos_in()) {
     case btos:
     case ctos:
     case stos:
       ShouldNotReachHere();  // btos/ctos/stos should use itos.
       break;
     case atos: vep = __ pc(); __ pop(atos); aep = __ pc(); generate_and_dispatch(t); break;
     case itos: vep = __ pc(); __ pop(itos); iep = __ pc(); generate_and_dispatch(t); break;
     case ltos: vep = __ pc(); __ pop(ltos); lep = __ pc(); generate_and_dispatch(t); break;
     case ftos: vep = __ pc(); __ pop(ftos); fep = __ pc(); generate_and_dispatch(t); break;
     case dtos: vep = __ pc(); __ pop(dtos); dep = __ pc(); generate_and_dispatch(t); break;
     case vtos: set_vtos_entry_points(t, bep, cep, sep, aep, iep, lep, fep, dep, vep);     break;
     default  : ShouldNotReachHere();                                                 break;
   }
 }
 //------------------------------------------------------------------------------------------------------------------------
 void TemplateInterpreterGenerator::generate_and_dispatch(Template* t, TosState tos_out) {
   if (PrintBytecodeHistogram)                                    histogram_bytecode(t);
 #ifndef PRODUCT
   // debugging code
   if (CountBytecodes || TraceBytecodes || StopInterpreterAt > 0) count_bytecode();
   if (PrintBytecodePairHistogram)                                histogram_bytecode_pair(t);
   if (TraceBytecodes)                                            trace_bytecode(t);
   if (StopInterpreterAt > 0)                                     stop_interpreter_at();
   __ verify_FPU(1, t->tos_in());
 #endif // !PRODUCT
   int step;
   if (!t->does_dispatch()) {
     step = t->is_wide() ? Bytecodes::wide_length_for(t->bytecode()) : Bytecodes::length_for(t->bytecode());
     if (tos_out == ilgl) tos_out = t->tos_out();
     // compute bytecode size
     assert(step > 0, "just checkin'");
     // setup stuff for dispatching next bytecode
     if (ProfileInterpreter && VerifyDataPointer
         && MethodData::bytecode_has_profile(t->bytecode())) {
       __ verify_method_data_pointer();
     }
     __ dispatch_prolog(tos_out, step);
   }
   // generate template
   t->generate(_masm);
   // advance
   if (t->does_dispatch()) {
 #ifdef ASSERT
     // make sure execution doesn't go beyond this point if code is broken
     __ should_not_reach_here();
 #endif // ASSERT
   } else {
     // dispatch to next bytecode
     __ dispatch_epilog(tos_out, step);
   }
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Entry points
 /**
  * Returns the return entry table for the given invoke bytecode.
  */
 address* TemplateInterpreter::invoke_return_entry_table_for(Bytecodes::Code code) {
   switch (code) {
   case Bytecodes::_invokestatic:
   case Bytecodes::_invokespecial:
   case Bytecodes::_invokevirtual:
   case Bytecodes::_invokehandle:
     return Interpreter::invoke_return_entry_table();
   case Bytecodes::_invokeinterface:
     return Interpreter::invokeinterface_return_entry_table();
   case Bytecodes::_invokedynamic:
     return Interpreter::invokedynamic_return_entry_table();
   default:
     fatal(err_msg("invalid bytecode: %s", Bytecodes::name(code)));
     return NULL;
   }
 }
 /**
  * Returns the return entry address for the given top-of-stack state and bytecode.
  */
 address TemplateInterpreter::return_entry(TosState state, int length, Bytecodes::Code code) {
   guarantee(0 <= length && length < Interpreter::number_of_return_entries, "illegal length");
   const int index = TosState_as_index(state);
   switch (code) {
   case Bytecodes::_invokestatic:
   case Bytecodes::_invokespecial:
   case Bytecodes::_invokevirtual:
   case Bytecodes::_invokehandle:
     return _invoke_return_entry[index];
   case Bytecodes::_invokeinterface:
     return _invokeinterface_return_entry[index];
   case Bytecodes::_invokedynamic:
     return _invokedynamic_return_entry[index];
   default:
     assert(!Bytecodes::is_invoke(code), err_msg("invoke instructions should be handled separately: %s", Bytecodes::name(code)));
     return _return_entry[length].entry(state);
   }
 }
 address TemplateInterpreter::deopt_entry(TosState state, int length) {
   guarantee(0 <= length && length < Interpreter::number_of_deopt_entries, "illegal length");
   return _deopt_entry[length].entry(state);
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Suport for invokes
 int TemplateInterpreter::TosState_as_index(TosState state) {
   assert( state < number_of_states , "Invalid state in TosState_as_index");
   assert(0 <= (int)state && (int)state < TemplateInterpreter::number_of_return_addrs, "index out of bounds");
   return (int)state;
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Safepoint suppport
 static inline void copy_table(address* from, address* to, int size) {
   // Copy non-overlapping tables. The copy has to occur word wise for MT safety.
   while (size-- > 0) *to++ = *from++;
 }
 void TemplateInterpreter::notice_safepoints() {
   if (!_notice_safepoints) {
     // switch to safepoint dispatch table
     _notice_safepoints = true;
     copy_table((address*)&_safept_table, (address*)&_active_table, sizeof(_active_table) / sizeof(address));
   }
 }
 // switch from the dispatch table which notices safepoints back to the
 // normal dispatch table.  So that we can notice single stepping points,
 // keep the safepoint dispatch table if we are single stepping in JVMTI.
 // Note that the should_post_single_step test is exactly as fast as the
 // JvmtiExport::_enabled test and covers both cases.
 void TemplateInterpreter::ignore_safepoints() {
   if (_notice_safepoints) {
     if (!JvmtiExport::should_post_single_step()) {
       // switch to normal dispatch table
       _notice_safepoints = false;
       copy_table((address*)&_normal_table, (address*)&_active_table, sizeof(_active_table) / sizeof(address));
     }
   }
 }
 //------------------------------------------------------------------------------------------------------------------------
 // Deoptimization support
 // If deoptimization happens, this function returns the point of next bytecode to continue execution
 address TemplateInterpreter::deopt_continue_after_entry(Method* method, address bcp, int callee_parameters, bool is_top_frame) {
   return AbstractInterpreter::deopt_continue_after_entry(method, bcp, callee_parameters, is_top_frame);
 }
 // If deoptimization happens, this function returns the point where the interpreter reexecutes
 // the bytecode.
 // Note: Bytecodes::_athrow (C1 only) and Bytecodes::_return are the special cases
 //       that do not return "Interpreter::deopt_entry(vtos, 0)"
 address TemplateInterpreter::deopt_reexecute_entry(Method* method, address bcp) {
   assert(method->contains(bcp), "just checkin'");
   Bytecodes::Code code   = Bytecodes::java_code_at(method, bcp);
   if (code == Bytecodes::_return) {
     // This is used for deopt during registration of finalizers
     // during Object.<init>.  We simply need to resume execution at
     // the standard return vtos bytecode to pop the frame normally.
     // reexecuting the real bytecode would cause double registration
     // of the finalizable object.
     return _normal_table.entry(Bytecodes::_return).entry(vtos);
   } else {
     return AbstractInterpreter::deopt_reexecute_entry(method, bcp);
   }
 }
 // If deoptimization happens, the interpreter should reexecute this bytecode.
 // This function mainly helps the compilers to set up the reexecute bit.
 bool TemplateInterpreter::bytecode_should_reexecute(Bytecodes::Code code) {
   if (code == Bytecodes::_return) {
     //Yes, we consider Bytecodes::_return as a special case of reexecution
     return true;
   } else {
     return AbstractInterpreter::bytecode_should_reexecute(code);
   }
 }
 #endif // !CC_INTERP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/interpreter/templateInterpreter.cpp@f90c822e73f8 (annotated)

src/share/vm/interpreter/templateInterpreter.cpp