| /* |
| * Copyright 1997-2007 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/_interpreter.cpp.incl" |
| |
| # define __ _masm-> |
| |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Implementation of InterpreterCodelet |
| |
| void InterpreterCodelet::initialize(const char* description, Bytecodes::Code bytecode) { |
| _description = description; |
| _bytecode = bytecode; |
| } |
| |
| |
| void InterpreterCodelet::verify() { |
| } |
| |
| |
| void InterpreterCodelet::print() { |
| if (PrintInterpreter) { |
| tty->cr(); |
| tty->print_cr("----------------------------------------------------------------------"); |
| } |
| |
| if (description() != NULL) tty->print("%s ", description()); |
| if (bytecode() >= 0 ) tty->print("%d %s ", bytecode(), Bytecodes::name(bytecode())); |
| tty->print_cr("[" INTPTR_FORMAT ", " INTPTR_FORMAT "] %d bytes", |
| code_begin(), code_end(), code_size()); |
| |
| if (PrintInterpreter) { |
| tty->cr(); |
| Disassembler::decode(code_begin(), code_end(), tty); |
| } |
| } |
| |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // 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()); |
| tty->print_cr("avg codelet size = %6d bytes", _code->used_space() / _code->number_of_stubs()); |
| tty->cr(); |
| _code->print(); |
| tty->print_cr("----------------------------------------------------------------------"); |
| tty->cr(); |
| } |
| |
| |
| void interpreter_init() { |
| Interpreter::initialize(); |
| #ifndef PRODUCT |
| if (TraceBytecodes) BytecodeTracer::set_closure(BytecodeTracer::std_closure()); |
| #endif // PRODUCT |
| // need to hit every safepoint in order to call zapping routine |
| // register the interpreter |
| VTune::register_stub( |
| "Interpreter", |
| AbstractInterpreter::code()->code_start(), |
| AbstractInterpreter::code()->code_end() |
| ); |
| Forte::register_stub( |
| "Interpreter", |
| AbstractInterpreter::code()->code_start(), |
| AbstractInterpreter::code()->code_end() |
| ); |
| |
| // notify JVMTI profiler |
| if (JvmtiExport::should_post_dynamic_code_generated()) { |
| JvmtiExport::post_dynamic_code_generated("Interpreter", |
| AbstractInterpreter::code()->code_start(), |
| AbstractInterpreter::code()->code_end()); |
| } |
| } |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // 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; |
| } |
| |
| |
| 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 AbstractInterpreterGenerator::generate_all() { |
| |
| |
| { CodeletMark cm(_masm, "slow signature handler"); |
| Interpreter::_slow_signature_handler = generate_slow_signature_handler(); |
| } |
| |
| } |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Entry points |
| |
| AbstractInterpreter::MethodKind AbstractInterpreter::method_kind(methodHandle m) { |
| // Abstract method? |
| if (m->is_abstract()) return abstract; |
| |
| // Native method? |
| // Note: This test must come _before_ the test for intrinsic |
| // methods. See also comments below. |
| if (m->is_native()) { |
| 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; |
| } |
| |
| // Accessor method? |
| if (m->is_accessor()) { |
| assert(m->size_of_parameters() == 1, "fast code for accessors assumes parameter size = 1"); |
| return accessor; |
| } |
| |
| // 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 |
| // AbstractInterpreterGenerator::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; |
| } |
| |
| // Note: for now: zero locals for all non-empty methods |
| return zerolocals; |
| } |
| |
| |
| // 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(methodHandle method, int bci) { |
| address bcp = method->bcp_from(bci); |
| |
| if (!Bytecode_at(bcp)->must_rewrite()) { |
| // 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; |
| default : ShouldNotReachHere(); |
| } |
| } |
| #endif // PRODUCT |
| |
| static BasicType constant_pool_type(methodOop method, int index) { |
| constantTag tag = method->constants()->tag_at(index); |
| if (tag.is_int ()) return T_INT; |
| else if (tag.is_float ()) return T_FLOAT; |
| else if (tag.is_long ()) return T_LONG; |
| else if (tag.is_double ()) return T_DOUBLE; |
| else if (tag.is_string ()) return T_OBJECT; |
| else if (tag.is_unresolved_string()) return T_OBJECT; |
| else if (tag.is_klass ()) return T_OBJECT; |
| else if (tag.is_unresolved_klass ()) return T_OBJECT; |
| ShouldNotReachHere(); |
| return T_ILLEGAL; |
| } |
| |
| |
| //------------------------------------------------------------------------------------------------------------------------ |
| // Deoptimization support |
| |
| // If deoptimization happens, this method returns the point where to continue in |
| // interpreter. For calls (invokexxxx, newxxxx) the continuation is at next |
| // bci and the top of stack is in eax/edx/FPU tos. |
| // For putfield/getfield, put/getstatic, the continuation is at the same |
| // bci and the TOS is on stack. |
| |
| // Note: deopt_entry(type, 0) means reexecute bytecode |
| // deopt_entry(type, length) means continue at next bytecode |
| |
| address AbstractInterpreter::continuation_for(methodOop method, address bcp, int callee_parameters, bool is_top_frame, bool& use_next_mdp) { |
| assert(method->contains(bcp), "just checkin'"); |
| Bytecodes::Code code = Bytecodes::java_code_at(bcp); |
| int bci = method->bci_from(bcp); |
| int length = -1; // initial value for debugging |
| // compute continuation length |
| length = Bytecodes::length_at(bcp); |
| // compute result type |
| BasicType type = T_ILLEGAL; |
| // when continuing after a compiler safepoint, re-execute the bytecode |
| // (an invoke is continued after the safepoint) |
| use_next_mdp = true; |
| switch (code) { |
| case Bytecodes::_lookupswitch: |
| case Bytecodes::_tableswitch: |
| case Bytecodes::_fast_binaryswitch: |
| case Bytecodes::_fast_linearswitch: |
| // recompute condtional expression folded into _if<cond> |
| 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 : |
| // reexecute the operation and TOS value is on stack |
| assert(is_top_frame, "must be top frame"); |
| use_next_mdp = false; |
| return Interpreter::deopt_entry(vtos, 0); |
| break; |
| |
| #ifdef COMPILER1 |
| case Bytecodes::_athrow : |
| assert(is_top_frame, "must be top frame"); |
| use_next_mdp = false; |
| return Interpreter::rethrow_exception_entry(); |
| break; |
| #endif /* COMPILER1 */ |
| |
| 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_at(mh, bci)->result_type(thread); |
| // 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::_ldc : |
| type = constant_pool_type( method, *(bcp+1) ); |
| break; |
| |
| case Bytecodes::_ldc_w : // fall through |
| case Bytecodes::_ldc2_w: |
| type = constant_pool_type( method, Bytes::get_Java_u2(bcp+1) ); |
| 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); |
| } |
| |
| void AbstractInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { |
| // Quick & dirty stack overflow checking: bang the stack & handle trap. |
| // Note that we do the banging after the frame is setup, since the exception |
| // handling code expects to find a valid interpreter frame on the stack. |
| // Doing the banging earlier fails if the caller frame is not an interpreter |
| // frame. |
| // (Also, the exception throwing code expects to unlock any synchronized |
| // method receiever, so do the banging after locking the receiver.) |
| |
| // Bang each page in the shadow zone. We can't assume it's been done for |
| // an interpreter frame with greater than a page of locals, so each page |
| // needs to be checked. Only true for non-native. |
| if (UseStackBanging) { |
| const int start_page = native_call ? StackShadowPages : 1; |
| const int page_size = os::vm_page_size(); |
| for (int pages = start_page; pages <= StackShadowPages ; pages++) { |
| __ bang_stack_with_offset(pages*page_size); |
| } |
| } |
| } |
