Mercurial > hg > truffle
view src/cpu/sparc/vm/interpreterRT_sparc.cpp @ 453:c96030fff130
6684579: SoftReference processing can be made more efficient
Summary: For current soft-ref clearing policies, we can decide at marking time if a soft-reference will definitely not be cleared, postponing the decision of whether it will definitely be cleared to the final reference processing phase. This can be especially beneficial in the case of concurrent collectors where the marking is usually concurrent but reference processing is usually not.
Reviewed-by: jmasa
author | ysr |
---|---|
date | Thu, 20 Nov 2008 16:56:09 -0800 |
parents | a61af66fc99e |
children | 6b2273dd6fa9 |
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/* * Copyright 1998-2006 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/_interpreterRT_sparc.cpp.incl" #define __ _masm-> // Implementation of SignatureHandlerGenerator void InterpreterRuntime::SignatureHandlerGenerator::pass_word(int size_of_arg, int offset_in_arg) { Argument jni_arg(jni_offset() + offset_in_arg, false); Register Rtmp = O0; __ ld(Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp); __ store_argument(Rtmp, jni_arg); } void InterpreterRuntime::SignatureHandlerGenerator::pass_long() { Argument jni_arg(jni_offset(), false); Register Rtmp = O0; #ifdef ASSERT if (TaggedStackInterpreter) { // check at least one tag is okay Label ok; __ ld_ptr(Llocals, Interpreter::local_tag_offset_in_bytes(offset() + 1), Rtmp); __ cmp(Rtmp, G0); __ brx(Assembler::equal, false, Assembler::pt, ok); __ delayed()->nop(); __ stop("Native object has bad tag value"); __ bind(ok); } #endif // ASSERT #ifdef _LP64 __ ldx(Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp); __ store_long_argument(Rtmp, jni_arg); #else __ ld(Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp); __ store_argument(Rtmp, jni_arg); __ ld(Llocals, Interpreter::local_offset_in_bytes(offset() + 0), Rtmp); Argument successor(jni_arg.successor()); __ store_argument(Rtmp, successor); #endif } #ifdef _LP64 void InterpreterRuntime::SignatureHandlerGenerator::pass_float() { Argument jni_arg(jni_offset(), false); FloatRegister Rtmp = F0; __ ldf(FloatRegisterImpl::S, Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp); __ store_float_argument(Rtmp, jni_arg); } #endif void InterpreterRuntime::SignatureHandlerGenerator::pass_double() { Argument jni_arg(jni_offset(), false); #ifdef _LP64 FloatRegister Rtmp = F0; __ ldf(FloatRegisterImpl::D, Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp); __ store_double_argument(Rtmp, jni_arg); #else Register Rtmp = O0; __ ld(Llocals, Interpreter::local_offset_in_bytes(offset() + 1), Rtmp); __ store_argument(Rtmp, jni_arg); __ ld(Llocals, Interpreter::local_offset_in_bytes(offset()), Rtmp); Argument successor(jni_arg.successor()); __ store_argument(Rtmp, successor); #endif } void InterpreterRuntime::SignatureHandlerGenerator::pass_object() { Argument jni_arg(jni_offset(), false); Argument java_arg( offset(), true); Register Rtmp1 = O0; Register Rtmp2 = jni_arg.is_register() ? jni_arg.as_register() : O0; Register Rtmp3 = G3_scratch; // the handle for a receiver will never be null bool do_NULL_check = offset() != 0 || is_static(); Address h_arg = Address(Llocals, 0, Interpreter::local_offset_in_bytes(offset())); __ ld_ptr(h_arg, Rtmp1); #ifdef ASSERT if (TaggedStackInterpreter) { // check we have the obj and not the tag Label ok; __ mov(frame::TagReference, Rtmp3); __ cmp(Rtmp1, Rtmp3); __ brx(Assembler::notEqual, true, Assembler::pt, ok); __ delayed()->nop(); __ stop("Native object passed tag by mistake"); __ bind(ok); } #endif // ASSERT if (!do_NULL_check) { __ add(h_arg, Rtmp2); } else { if (Rtmp1 == Rtmp2) __ tst(Rtmp1); else __ addcc(G0, Rtmp1, Rtmp2); // optimize mov/test pair Label L; __ brx(Assembler::notZero, true, Assembler::pt, L); __ delayed()->add(h_arg, Rtmp2); __ bind(L); } __ store_ptr_argument(Rtmp2, jni_arg); // this is often a no-op } void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) { // generate code to handle arguments iterate(fingerprint); // return result handler Address result_handler(Lscratch, Interpreter::result_handler(method()->result_type())); __ sethi(result_handler); __ retl(); __ delayed()->add(result_handler, result_handler.base()); __ flush(); } // Implementation of SignatureHandlerLibrary void SignatureHandlerLibrary::pd_set_handler(address handler) {} class SlowSignatureHandler: public NativeSignatureIterator { private: address _from; intptr_t* _to; intptr_t* _RegArgSignature; // Signature of first Arguments to be passed in Registers uint _argcount; enum { // We need to differenciate float from non floats in reg args non_float = 0, float_sig = 1, double_sig = 2, long_sig = 3 }; #ifdef ASSERT void verify_tag(frame::Tag t) { assert(!TaggedStackInterpreter || *(intptr_t*)(_from+Interpreter::local_tag_offset_in_bytes(0)) == t, "wrong tag"); } #endif // ASSERT virtual void pass_int() { *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0)); debug_only(verify_tag(frame::TagValue)); _from -= Interpreter::stackElementSize(); add_signature( non_float ); } virtual void pass_object() { // pass address of from intptr_t *from_addr = (intptr_t*)(_from + Interpreter::local_offset_in_bytes(0)); *_to++ = (*from_addr == 0) ? NULL : (intptr_t) from_addr; debug_only(verify_tag(frame::TagReference)); _from -= Interpreter::stackElementSize(); add_signature( non_float ); } #ifdef _LP64 virtual void pass_float() { *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0)); debug_only(verify_tag(frame::TagValue)); _from -= Interpreter::stackElementSize(); add_signature( float_sig ); } virtual void pass_double() { *_to++ = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1)); debug_only(verify_tag(frame::TagValue)); _from -= 2*Interpreter::stackElementSize(); add_signature( double_sig ); } virtual void pass_long() { _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1)); debug_only(verify_tag(frame::TagValue)); _to += 1; _from -= 2*Interpreter::stackElementSize(); add_signature( long_sig ); } #else // pass_double() is pass_long() and pass_float() only _LP64 virtual void pass_long() { _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1)); _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0)); debug_only(verify_tag(frame::TagValue)); _to += 2; _from -= 2*Interpreter::stackElementSize(); add_signature( non_float ); } #endif // _LP64 virtual void add_signature( intptr_t sig_type ) { if ( _argcount < (sizeof (intptr_t))*4 ) { *_RegArgSignature |= (sig_type << (_argcount*2) ); _argcount++; } } public: SlowSignatureHandler(methodHandle method, address from, intptr_t* to, intptr_t *RegArgSig) : NativeSignatureIterator(method) { _from = from; _to = to; _RegArgSignature = RegArgSig; *_RegArgSignature = 0; _argcount = method->is_static() ? 2 : 1; } }; IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler( JavaThread* thread, methodOopDesc* method, intptr_t* from, intptr_t* to )) methodHandle m(thread, method); assert(m->is_native(), "sanity check"); // handle arguments // Warning: We use reg arg slot 00 temporarily to return the RegArgSignature // back to the code that pops the arguments into the CPU registers SlowSignatureHandler(m, (address)from, m->is_static() ? to+2 : to+1, to).iterate(UCONST64(-1)); // return result handler return Interpreter::result_handler(m->result_type()); IRT_END