diff -r 8333d76c7fee -r 62c12ca7a45e hotspot/src/share/vm/interpreter/abstractInterpreter.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hotspot/src/share/vm/interpreter/abstractInterpreter.cpp Tue Jan 12 13:14:41 2016 -0500 @@ -0,0 +1,420 @@ +/* + * Copyright (c) 1997, 2015, 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 "asm/macroAssembler.hpp" +#include "asm/macroAssembler.inline.hpp" +#include "interpreter/bytecodeHistogram.hpp" +#include "interpreter/bytecodeInterpreter.hpp" +#include "interpreter/interpreter.hpp" +#include "interpreter/interpreterRuntime.hpp" +#include "interpreter/interp_masm.hpp" +#include "interpreter/templateTable.hpp" +#include "memory/allocation.inline.hpp" +#include "memory/resourceArea.hpp" +#include "oops/arrayOop.hpp" +#include "oops/methodData.hpp" +#include "oops/method.hpp" +#include "oops/oop.inline.hpp" +#include "prims/forte.hpp" +#include "prims/jvmtiExport.hpp" +#include "prims/methodHandles.hpp" +#include "runtime/handles.inline.hpp" +#include "runtime/sharedRuntime.hpp" +#include "runtime/stubRoutines.hpp" +#include "runtime/timer.hpp" + +# define __ _masm-> + +//------------------------------------------------------------------------------------------------------------------------ +// Implementation of platform independent aspects of Interpreter + +void AbstractInterpreter::initialize() { + if (_code != NULL) return; + + // make sure 'imported' classes are initialized + if (CountBytecodes || TraceBytecodes || StopInterpreterAt) BytecodeCounter::reset(); + if (PrintBytecodeHistogram) BytecodeHistogram::reset(); + if (PrintBytecodePairHistogram) BytecodePairHistogram::reset(); + + InvocationCounter::reinitialize(DelayCompilationDuringStartup); + +} + +void AbstractInterpreter::print() { + tty->cr(); + tty->print_cr("----------------------------------------------------------------------"); + tty->print_cr("Interpreter"); + tty->cr(); + tty->print_cr("code size = %6dK bytes", (int)_code->used_space()/1024); + tty->print_cr("total space = %6dK bytes", (int)_code->total_space()/1024); + tty->print_cr("wasted space = %6dK bytes", (int)_code->available_space()/1024); + tty->cr(); + tty->print_cr("# of codelets = %6d" , _code->number_of_stubs()); + if (_code->number_of_stubs() != 0) { + tty->print_cr("avg codelet size = %6d bytes", _code->used_space() / _code->number_of_stubs()); + tty->cr(); + } + _code->print(); + tty->print_cr("----------------------------------------------------------------------"); + tty->cr(); +} + + +//------------------------------------------------------------------------------------------------------------------------ +// Implementation of interpreter + +StubQueue* AbstractInterpreter::_code = NULL; +bool AbstractInterpreter::_notice_safepoints = false; +address AbstractInterpreter::_rethrow_exception_entry = NULL; + +address AbstractInterpreter::_native_entry_begin = NULL; +address AbstractInterpreter::_native_entry_end = NULL; +address AbstractInterpreter::_slow_signature_handler; +address AbstractInterpreter::_entry_table [AbstractInterpreter::number_of_method_entries]; +address AbstractInterpreter::_native_abi_to_tosca [AbstractInterpreter::number_of_result_handlers]; + +//------------------------------------------------------------------------------------------------------------------------ +// Generation of complete interpreter + +AbstractInterpreterGenerator::AbstractInterpreterGenerator(StubQueue* _code) { + _masm = NULL; +} + + +//------------------------------------------------------------------------------------------------------------------------ +// Entry points + +AbstractInterpreter::MethodKind AbstractInterpreter::method_kind(methodHandle m) { + // Abstract method? + if (m->is_abstract()) return abstract; + + // Method handle primitive? + if (m->is_method_handle_intrinsic()) { + vmIntrinsics::ID id = m->intrinsic_id(); + assert(MethodHandles::is_signature_polymorphic(id), "must match an intrinsic"); + MethodKind kind = (MethodKind)( method_handle_invoke_FIRST + + ((int)id - vmIntrinsics::FIRST_MH_SIG_POLY) ); + assert(kind <= method_handle_invoke_LAST, "parallel enum ranges"); + return kind; + } + +#ifndef CC_INTERP + if (UseCRC32Intrinsics && m->is_native()) { + // Use optimized stub code for CRC32 native methods. + switch (m->intrinsic_id()) { + case vmIntrinsics::_updateCRC32 : return java_util_zip_CRC32_update; + case vmIntrinsics::_updateBytesCRC32 : return java_util_zip_CRC32_updateBytes; + case vmIntrinsics::_updateByteBufferCRC32 : return java_util_zip_CRC32_updateByteBuffer; + } + } + if (UseCRC32CIntrinsics) { + // Use optimized stub code for CRC32C methods. + switch (m->intrinsic_id()) { + case vmIntrinsics::_updateBytesCRC32C : return java_util_zip_CRC32C_updateBytes; + case vmIntrinsics::_updateDirectByteBufferCRC32C : return java_util_zip_CRC32C_updateDirectByteBuffer; + } + } + + switch(m->intrinsic_id()) { + case vmIntrinsics::_intBitsToFloat: return java_lang_Float_intBitsToFloat; + case vmIntrinsics::_floatToRawIntBits: return java_lang_Float_floatToRawIntBits; + case vmIntrinsics::_longBitsToDouble: return java_lang_Double_longBitsToDouble; + case vmIntrinsics::_doubleToRawLongBits: return java_lang_Double_doubleToRawLongBits; + } + +#endif // CC_INTERP + + // Native method? + // Note: This test must come _before_ the test for intrinsic + // methods. See also comments below. + if (m->is_native()) { + assert(!m->is_method_handle_intrinsic(), "overlapping bits here, watch out"); + return m->is_synchronized() ? native_synchronized : native; + } + + // Synchronized? + if (m->is_synchronized()) { + return zerolocals_synchronized; + } + + if (RegisterFinalizersAtInit && m->code_size() == 1 && + m->intrinsic_id() == vmIntrinsics::_Object_init) { + // We need to execute the special return bytecode to check for + // finalizer registration so create a normal frame. + return zerolocals; + } + + // Empty method? + if (m->is_empty_method()) { + return empty; + } + + // Special intrinsic method? + // Note: This test must come _after_ the test for native methods, + // otherwise we will run into problems with JDK 1.2, see also + // TemplateInterpreterGenerator::generate_method_entry() for + // for details. + switch (m->intrinsic_id()) { + case vmIntrinsics::_dsin : return java_lang_math_sin ; + case vmIntrinsics::_dcos : return java_lang_math_cos ; + case vmIntrinsics::_dtan : return java_lang_math_tan ; + case vmIntrinsics::_dabs : return java_lang_math_abs ; + case vmIntrinsics::_dsqrt : return java_lang_math_sqrt ; + case vmIntrinsics::_dlog : return java_lang_math_log ; + case vmIntrinsics::_dlog10: return java_lang_math_log10; + case vmIntrinsics::_dpow : return java_lang_math_pow ; + case vmIntrinsics::_dexp : return java_lang_math_exp ; + + case vmIntrinsics::_Reference_get: + return java_lang_ref_reference_get; + } + + // Accessor method? + if (m->is_getter()) { + // TODO: We should have used ::is_accessor above, but fast accessors in Zero expect only getters. + // See CppInterpreter::accessor_entry in cppInterpreter_zero.cpp. This should be fixed in Zero, + // then the call above updated to ::is_accessor + assert(m->size_of_parameters() == 1, "fast code for accessors assumes parameter size = 1"); + return accessor; + } + + // Note: for now: zero locals for all non-empty methods + return zerolocals; +} + + +void AbstractInterpreter::set_entry_for_kind(AbstractInterpreter::MethodKind kind, address entry) { + assert(kind >= method_handle_invoke_FIRST && + kind <= method_handle_invoke_LAST, "late initialization only for MH entry points"); + assert(_entry_table[kind] == _entry_table[abstract], "previous value must be AME entry"); + _entry_table[kind] = entry; +} + + +// Return true if the interpreter can prove that the given bytecode has +// not yet been executed (in Java semantics, not in actual operation). +bool AbstractInterpreter::is_not_reached(const methodHandle& method, int bci) { + Bytecodes::Code code = method()->code_at(bci); + + if (!Bytecodes::must_rewrite(code)) { + // might have been reached + return false; + } + + // the bytecode might not be rewritten if the method is an accessor, etc. + address ientry = method->interpreter_entry(); + if (ientry != entry_for_kind(AbstractInterpreter::zerolocals) && + ientry != entry_for_kind(AbstractInterpreter::zerolocals_synchronized)) + return false; // interpreter does not run this method! + + // otherwise, we can be sure this bytecode has never been executed + return true; +} + + +#ifndef PRODUCT +void AbstractInterpreter::print_method_kind(MethodKind kind) { + switch (kind) { + case zerolocals : tty->print("zerolocals" ); break; + case zerolocals_synchronized: tty->print("zerolocals_synchronized"); break; + case native : tty->print("native" ); break; + case native_synchronized : tty->print("native_synchronized" ); break; + case empty : tty->print("empty" ); break; + case accessor : tty->print("accessor" ); break; + case abstract : tty->print("abstract" ); break; + case java_lang_math_sin : tty->print("java_lang_math_sin" ); break; + case java_lang_math_cos : tty->print("java_lang_math_cos" ); break; + case java_lang_math_tan : tty->print("java_lang_math_tan" ); break; + case java_lang_math_abs : tty->print("java_lang_math_abs" ); break; + case java_lang_math_sqrt : tty->print("java_lang_math_sqrt" ); break; + case java_lang_math_log : tty->print("java_lang_math_log" ); break; + case java_lang_math_log10 : tty->print("java_lang_math_log10" ); break; + case java_util_zip_CRC32_update : tty->print("java_util_zip_CRC32_update"); break; + case java_util_zip_CRC32_updateBytes : tty->print("java_util_zip_CRC32_updateBytes"); break; + case java_util_zip_CRC32_updateByteBuffer : tty->print("java_util_zip_CRC32_updateByteBuffer"); break; + case java_util_zip_CRC32C_updateBytes : tty->print("java_util_zip_CRC32C_updateBytes"); break; + case java_util_zip_CRC32C_updateDirectByteBuffer: tty->print("java_util_zip_CRC32C_updateDirectByteByffer"); break; + default: + if (kind >= method_handle_invoke_FIRST && + kind <= method_handle_invoke_LAST) { + const char* kind_name = vmIntrinsics::name_at(method_handle_intrinsic(kind)); + if (kind_name[0] == '_') kind_name = &kind_name[1]; // '_invokeExact' => 'invokeExact' + tty->print("method_handle_%s", kind_name); + break; + } + ShouldNotReachHere(); + break; + } +} +#endif // PRODUCT + + +//------------------------------------------------------------------------------------------------------------------------ +// Deoptimization support + +/** + * If a deoptimization happens, this function returns the point of next bytecode to continue execution. + */ +address AbstractInterpreter::deopt_continue_after_entry(Method* method, address bcp, int callee_parameters, bool is_top_frame) { + assert(method->contains(bcp), "just checkin'"); + + // Get the original and rewritten bytecode. + Bytecodes::Code code = Bytecodes::java_code_at(method, bcp); + assert(!Interpreter::bytecode_should_reexecute(code), "should not reexecute"); + + const int bci = method->bci_from(bcp); + + // compute continuation length + const int length = Bytecodes::length_at(method, bcp); + + // compute result type + BasicType type = T_ILLEGAL; + + switch (code) { + case Bytecodes::_invokevirtual : + case Bytecodes::_invokespecial : + case Bytecodes::_invokestatic : + case Bytecodes::_invokeinterface: { + Thread *thread = Thread::current(); + ResourceMark rm(thread); + methodHandle mh(thread, method); + type = Bytecode_invoke(mh, bci).result_type(); + // since the cache entry might not be initialized: + // (NOT needed for the old calling convension) + if (!is_top_frame) { + int index = Bytes::get_native_u2(bcp+1); + method->constants()->cache()->entry_at(index)->set_parameter_size(callee_parameters); + } + break; + } + + case Bytecodes::_invokedynamic: { + Thread *thread = Thread::current(); + ResourceMark rm(thread); + methodHandle mh(thread, method); + type = Bytecode_invoke(mh, bci).result_type(); + // since the cache entry might not be initialized: + // (NOT needed for the old calling convension) + if (!is_top_frame) { + int index = Bytes::get_native_u4(bcp+1); + method->constants()->invokedynamic_cp_cache_entry_at(index)->set_parameter_size(callee_parameters); + } + break; + } + + case Bytecodes::_ldc : + case Bytecodes::_ldc_w : // fall through + case Bytecodes::_ldc2_w: + { + Thread *thread = Thread::current(); + ResourceMark rm(thread); + methodHandle mh(thread, method); + type = Bytecode_loadconstant(mh, bci).result_type(); + break; + } + + default: + type = Bytecodes::result_type(code); + break; + } + + // return entry point for computed continuation state & bytecode length + return + is_top_frame + ? Interpreter::deopt_entry (as_TosState(type), length) + : Interpreter::return_entry(as_TosState(type), length, code); +} + +// If deoptimization happens, this function returns the point where the interpreter reexecutes +// the bytecode. +// Note: Bytecodes::_athrow is a special case in that it does not return +// Interpreter::deopt_entry(vtos, 0) like others +address AbstractInterpreter::deopt_reexecute_entry(Method* method, address bcp) { + assert(method->contains(bcp), "just checkin'"); + Bytecodes::Code code = Bytecodes::java_code_at(method, bcp); +#if defined(COMPILER1) || INCLUDE_JVMCI + if(code == Bytecodes::_athrow ) { + return Interpreter::rethrow_exception_entry(); + } +#endif /* COMPILER1 || INCLUDE_JVMCI */ + return Interpreter::deopt_entry(vtos, 0); +} + +// If deoptimization happens, the interpreter should reexecute these bytecodes. +// This function mainly helps the compilers to set up the reexecute bit. +bool AbstractInterpreter::bytecode_should_reexecute(Bytecodes::Code code) { + switch (code) { + case Bytecodes::_lookupswitch: + case Bytecodes::_tableswitch: + case Bytecodes::_fast_binaryswitch: + case Bytecodes::_fast_linearswitch: + // recompute condtional expression folded into _if + case Bytecodes::_lcmp : + case Bytecodes::_fcmpl : + case Bytecodes::_fcmpg : + case Bytecodes::_dcmpl : + case Bytecodes::_dcmpg : + case Bytecodes::_ifnull : + case Bytecodes::_ifnonnull : + case Bytecodes::_goto : + case Bytecodes::_goto_w : + case Bytecodes::_ifeq : + case Bytecodes::_ifne : + case Bytecodes::_iflt : + case Bytecodes::_ifge : + case Bytecodes::_ifgt : + case Bytecodes::_ifle : + case Bytecodes::_if_icmpeq : + case Bytecodes::_if_icmpne : + case Bytecodes::_if_icmplt : + case Bytecodes::_if_icmpge : + case Bytecodes::_if_icmpgt : + case Bytecodes::_if_icmple : + case Bytecodes::_if_acmpeq : + case Bytecodes::_if_acmpne : + // special cases + case Bytecodes::_getfield : + case Bytecodes::_putfield : + case Bytecodes::_getstatic : + case Bytecodes::_putstatic : + case Bytecodes::_aastore : +#ifdef COMPILER1 + //special case of reexecution + case Bytecodes::_athrow : +#endif + return true; + + default: + return false; + } +} + +void AbstractInterpreter::initialize_method_handle_entries() { + // method handle entry kinds are generated later in MethodHandlesAdapterGenerator::generate: + for (int i = method_handle_invoke_FIRST; i <= method_handle_invoke_LAST; i++) { + MethodKind kind = (MethodKind) i; + _entry_table[kind] = _entry_table[Interpreter::abstract]; + } +}