Mercurial > hg > truffle
view src/share/vm/shark/sharkIntrinsics.cpp @ 1994:6cd6d394f280
7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot || !gch->incremental_collection_failed())
7002546: regression on SpecJbb2005 on 7b118 comparing to 7b117 on small heaps
Summary: Relaxed assertion checking related to incremental_collection_failed flag to allow for ExplicitGCInvokesConcurrent behaviour where we do not want a failing scavenge to bail to a stop-world collection. Parameterized incremental_collection_will_fail() so we can selectively use, or not use, as appropriate, the statistical prediction at specific use sites. This essentially reverts the scavenge bail-out logic to what it was prior to some recent changes that had inadvertently started using the statistical prediction which can be noisy in the presence of bursty loads. Added some associated verbose non-product debugging messages.
Reviewed-by: johnc, tonyp
author | ysr |
---|---|
date | Tue, 07 Dec 2010 21:55:53 -0800 |
parents | f95d63e2154a |
children | 069ab3f976d3 |
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/* * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2009 Red Hat, Inc. * 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 "ci/ciMethod.hpp" #include "shark/llvmHeaders.hpp" #include "shark/sharkIntrinsics.hpp" #include "shark/sharkState.hpp" #include "shark/sharkValue.hpp" #include "shark/shark_globals.hpp" using namespace llvm; bool SharkIntrinsics::is_intrinsic(ciMethod *target) { switch (target->intrinsic_id()) { case vmIntrinsics::_none: return false; // java.lang.Math case vmIntrinsics::_min: case vmIntrinsics::_max: case vmIntrinsics::_dabs: case vmIntrinsics::_dsin: case vmIntrinsics::_dcos: case vmIntrinsics::_dtan: case vmIntrinsics::_datan2: case vmIntrinsics::_dsqrt: case vmIntrinsics::_dlog: case vmIntrinsics::_dlog10: case vmIntrinsics::_dpow: case vmIntrinsics::_dexp: return true; // java.lang.Object case vmIntrinsics::_getClass: return true; // java.lang.System case vmIntrinsics::_currentTimeMillis: return true; // java.lang.Thread case vmIntrinsics::_currentThread: return true; // sun.misc.Unsafe case vmIntrinsics::_compareAndSwapInt: return true; default: if (SharkPerformanceWarnings) { warning( "unhandled intrinsic vmIntrinsic::%s", vmIntrinsics::name_at(target->intrinsic_id())); } } return false; } void SharkIntrinsics::inline_intrinsic(ciMethod *target, SharkState *state) { SharkIntrinsics intrinsic(state, target); intrinsic.do_intrinsic(); } void SharkIntrinsics::do_intrinsic() { switch (target()->intrinsic_id()) { // java.lang.Math case vmIntrinsics::_min: do_Math_minmax(llvm::ICmpInst::ICMP_SLE); break; case vmIntrinsics::_max: do_Math_minmax(llvm::ICmpInst::ICMP_SGE); break; case vmIntrinsics::_dabs: do_Math_1to1(builder()->fabs()); break; case vmIntrinsics::_dsin: do_Math_1to1(builder()->sin()); break; case vmIntrinsics::_dcos: do_Math_1to1(builder()->cos()); break; case vmIntrinsics::_dtan: do_Math_1to1(builder()->tan()); break; case vmIntrinsics::_datan2: do_Math_2to1(builder()->atan2()); break; case vmIntrinsics::_dsqrt: do_Math_1to1(builder()->sqrt()); break; case vmIntrinsics::_dlog: do_Math_1to1(builder()->log()); break; case vmIntrinsics::_dlog10: do_Math_1to1(builder()->log10()); break; case vmIntrinsics::_dpow: do_Math_2to1(builder()->pow()); break; case vmIntrinsics::_dexp: do_Math_1to1(builder()->exp()); break; // java.lang.Object case vmIntrinsics::_getClass: do_Object_getClass(); break; // java.lang.System case vmIntrinsics::_currentTimeMillis: do_System_currentTimeMillis(); break; // java.lang.Thread case vmIntrinsics::_currentThread: do_Thread_currentThread(); break; // sun.misc.Unsafe case vmIntrinsics::_compareAndSwapInt: do_Unsafe_compareAndSwapInt(); break; default: ShouldNotReachHere(); } } void SharkIntrinsics::do_Math_minmax(ICmpInst::Predicate p) { // Pop the arguments SharkValue *sb = state()->pop(); SharkValue *sa = state()->pop(); Value *a = sa->jint_value(); Value *b = sb->jint_value(); // Perform the test BasicBlock *ip = builder()->GetBlockInsertionPoint(); BasicBlock *return_a = builder()->CreateBlock(ip, "return_a"); BasicBlock *return_b = builder()->CreateBlock(ip, "return_b"); BasicBlock *done = builder()->CreateBlock(ip, "done"); builder()->CreateCondBr(builder()->CreateICmp(p, a, b), return_a, return_b); builder()->SetInsertPoint(return_a); builder()->CreateBr(done); builder()->SetInsertPoint(return_b); builder()->CreateBr(done); builder()->SetInsertPoint(done); PHINode *phi = builder()->CreatePHI(a->getType(), "result"); phi->addIncoming(a, return_a); phi->addIncoming(b, return_b); // Push the result state()->push( SharkValue::create_jint( phi, sa->zero_checked() && sb->zero_checked())); } void SharkIntrinsics::do_Math_1to1(Value *function) { SharkValue *empty = state()->pop(); assert(empty == NULL, "should be"); state()->push( SharkValue::create_jdouble( builder()->CreateCall( function, state()->pop()->jdouble_value()))); state()->push(NULL); } void SharkIntrinsics::do_Math_2to1(Value *function) { SharkValue *empty = state()->pop(); assert(empty == NULL, "should be"); Value *y = state()->pop()->jdouble_value(); empty = state()->pop(); assert(empty == NULL, "should be"); Value *x = state()->pop()->jdouble_value(); state()->push( SharkValue::create_jdouble( builder()->CreateCall2(function, x, y))); state()->push(NULL); } void SharkIntrinsics::do_Object_getClass() { Value *klass = builder()->CreateValueOfStructEntry( state()->pop()->jobject_value(), in_ByteSize(oopDesc::klass_offset_in_bytes()), SharkType::oop_type(), "klass"); Value *klass_part = builder()->CreateAddressOfStructEntry( klass, in_ByteSize(klassOopDesc::klass_part_offset_in_bytes()), SharkType::klass_type(), "klass_part"); state()->push( SharkValue::create_jobject( builder()->CreateValueOfStructEntry( klass_part, in_ByteSize(Klass::java_mirror_offset_in_bytes()), SharkType::oop_type(), "java_mirror"), true)); } void SharkIntrinsics::do_System_currentTimeMillis() { state()->push( SharkValue::create_jlong( builder()->CreateCall(builder()->current_time_millis()), false)); state()->push(NULL); } void SharkIntrinsics::do_Thread_currentThread() { state()->push( SharkValue::create_jobject( builder()->CreateValueOfStructEntry( thread(), JavaThread::threadObj_offset(), SharkType::oop_type(), "threadObj"), true)); } void SharkIntrinsics::do_Unsafe_compareAndSwapInt() { // Pop the arguments Value *x = state()->pop()->jint_value(); Value *e = state()->pop()->jint_value(); SharkValue *empty = state()->pop(); assert(empty == NULL, "should be"); Value *offset = state()->pop()->jlong_value(); Value *object = state()->pop()->jobject_value(); Value *unsafe = state()->pop()->jobject_value(); // Convert the offset offset = builder()->CreateCall( builder()->unsafe_field_offset_to_byte_offset(), offset); // Locate the field Value *addr = builder()->CreateIntToPtr( builder()->CreateAdd( builder()->CreatePtrToInt(object, SharkType::intptr_type()), builder()->CreateIntCast(offset, SharkType::intptr_type(), true)), PointerType::getUnqual(SharkType::jint_type()), "addr"); // Perform the operation Value *result = builder()->CreateCmpxchgInt(x, addr, e); // Push the result state()->push( SharkValue::create_jint( builder()->CreateIntCast( builder()->CreateICmpEQ(result, e), SharkType::jint_type(), true), false)); }