| /* |
| * Copyright (c) 1997, 2019, 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/interpreterRuntime.hpp" |
| #include "interpreter/interp_masm.hpp" |
| #include "interpreter/templateInterpreter.hpp" |
| #include "interpreter/templateInterpreterGenerator.hpp" |
| #include "interpreter/templateTable.hpp" |
| #include "logging/log.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "runtime/safepoint.hpp" |
| #include "runtime/timerTrace.hpp" |
| #include "utilities/copy.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", TRACETIME_LOG(Info, startuptime)); |
| int code_size = InterpreterCodeSize; |
| NOT_PRODUCT(code_size *= 4;) // debug uses extra interpreter code space |
| _code = new StubQueue(new InterpreterCodeletInterface, code_size, NULL, |
| "Interpreter"); |
| TemplateInterpreterGenerator g(_code); |
| // Free the unused memory not occupied by the interpreter and the stubs |
| _code->deallocate_unused_tail(); |
| } |
| |
| if (PrintInterpreter) { |
| ResourceMark rm; |
| print(); |
| } |
| |
| // initialize dispatch table |
| _active_table = _normal_table; |
| } |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Implementation of EntryPoint |
| |
| EntryPoint::EntryPoint() { |
| assert(number_of_states == 10, "check the code below"); |
| _entry[btos] = NULL; |
| _entry[ztos] = 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 zentry, address centry, address sentry, address aentry, address ientry, address lentry, address fentry, address dentry, address ventry) { |
| assert(number_of_states == 10, "check the code below"); |
| _entry[btos] = bentry; |
| _entry[ztos] = zentry; |
| _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[ztos][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 == 10, "check the code below"); |
| _table[btos][i] = entry.entry(btos); |
| _table[ztos][i] = entry.entry(ztos); |
| _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 ]; |
| address TemplateInterpreter::_deopt_reexecute_return_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]; |
| |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // 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("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), "invoke instructions should be handled separately: %s", Bytecodes::name(code)); |
| address entry = _return_entry[length].entry(state); |
| vmassert(entry != NULL, "unsupported return entry requested, length=%d state=%d", length, index); |
| return entry; |
| } |
| } |
| |
| |
| address TemplateInterpreter::deopt_entry(TosState state, int length) { |
| guarantee(0 <= length && length < Interpreter::number_of_deopt_entries, "illegal length"); |
| address entry = _deopt_entry[length].entry(state); |
| vmassert(entry != NULL, "unsupported deopt entry requested, length=%d state=%d", length, TosState_as_index(state)); |
| return entry; |
| } |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // 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 support |
| |
| static inline void copy_table(address* from, address* to, int size) { |
| // Copy non-overlapping tables. |
| if (SafepointSynchronize::is_at_safepoint()) { |
| // Nothing is using the table at a safepoint so skip atomic word copy. |
| Copy::disjoint_words((HeapWord*)from, (HeapWord*)to, (size_t)size); |
| } else { |
| // Use atomic word copy when not at a safepoint for safety. |
| Copy::disjoint_words_atomic((HeapWord*)from, (HeapWord*)to, (size_t)size); |
| } |
| } |
| |
| void TemplateInterpreter::notice_safepoints() { |
| if (!_notice_safepoints) { |
| log_debug(interpreter, safepoint)("switching active_table to safept_table."); |
| // switch to safepoint dispatch table |
| _notice_safepoints = true; |
| copy_table((address*)&_safept_table, (address*)&_active_table, sizeof(_active_table) / sizeof(address)); |
| } else { |
| log_debug(interpreter, safepoint)("active_table is already safept_table; " |
| "notice_safepoints() call is no-op."); |
| } |
| } |
| |
| // 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()) { |
| log_debug(interpreter, safepoint)("switching active_table to normal_table."); |
| // switch to normal dispatch table |
| _notice_safepoints = false; |
| copy_table((address*)&_normal_table, (address*)&_active_table, sizeof(_active_table) / sizeof(address)); |
| } else { |
| log_debug(interpreter, safepoint)("single stepping is still active; " |
| "ignoring ignore_safepoints() call."); |
| } |
| } else { |
| log_debug(interpreter, safepoint)("active_table is already normal_table; " |
| "ignore_safepoints() call is no-op."); |
| } |
| } |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // 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::code_at(method, bcp); |
| if (code == Bytecodes::_return_register_finalizer) { |
| // 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 Interpreter::deopt_reexecute_return_entry(); |
| } 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); |
| } |
| } |
| |
| InterpreterCodelet* TemplateInterpreter::codelet_containing(address pc) { |
| return (InterpreterCodelet*)_code->stub_containing(pc); |
| } |
| |
| #endif // !CC_INTERP |