Mercurial > hg > graal-compiler
view src/share/vm/code/icBuffer.cpp @ 3837:43f9d800f276
7066339: Tiered: policy should make consistent decisions about osr levels
Summary: Added feedback disabling flag to common(), fixed handling of TieredStopAtLevel.
Reviewed-by: kvn, never
author | iveresov |
---|---|
date | Wed, 20 Jul 2011 18:04:17 -0700 |
parents | 1d1603768966 |
children | da91efe96a93 8c5333c80cfd |
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/* * Copyright (c) 1997, 2011, 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 "code/compiledIC.hpp" #include "code/icBuffer.hpp" #include "code/nmethod.hpp" #include "code/scopeDesc.hpp" #include "gc_interface/collectedHeap.inline.hpp" #include "interpreter/interpreter.hpp" #include "interpreter/linkResolver.hpp" #include "memory/resourceArea.hpp" #include "memory/universe.inline.hpp" #include "oops/methodOop.hpp" #include "oops/oop.inline.hpp" #include "oops/oop.inline2.hpp" #include "runtime/mutexLocker.hpp" #include "runtime/stubRoutines.hpp" #ifdef TARGET_ARCH_x86 # include "assembler_x86.inline.hpp" #endif #ifdef TARGET_ARCH_sparc # include "assembler_sparc.inline.hpp" #endif #ifdef TARGET_ARCH_zero # include "assembler_zero.inline.hpp" #endif #ifdef TARGET_ARCH_arm # include "assembler_arm.inline.hpp" #endif #ifdef TARGET_ARCH_ppc # include "assembler_ppc.inline.hpp" #endif DEF_STUB_INTERFACE(ICStub); StubQueue* InlineCacheBuffer::_buffer = NULL; ICStub* InlineCacheBuffer::_next_stub = NULL; void ICStub::finalize() { if (!is_empty()) { ResourceMark rm; CompiledIC *ic = CompiledIC_at(ic_site()); assert(CodeCache::find_nmethod(ic->instruction_address()) != NULL, "inline cache in non-nmethod?"); assert(this == ICStub_from_destination_address(ic->stub_address()), "wrong owner of ic buffer"); ic->set_cached_oop(cached_oop()); ic->set_ic_destination(destination()); } } address ICStub::destination() const { return InlineCacheBuffer::ic_buffer_entry_point(code_begin()); } oop ICStub::cached_oop() const { return InlineCacheBuffer::ic_buffer_cached_oop(code_begin()); } void ICStub::set_stub(CompiledIC *ic, oop cached_value, address dest_addr) { // We cannot store a pointer to the 'ic' object, since it is resource allocated. Instead we // store the location of the inline cache. Then we have enough information recreate the CompiledIC // object when we need to remove the stub. _ic_site = ic->instruction_address(); // Assemble new stub InlineCacheBuffer::assemble_ic_buffer_code(code_begin(), cached_value, dest_addr); assert(destination() == dest_addr, "can recover destination"); assert(cached_oop() == cached_value, "can recover destination"); } void ICStub::clear() { _ic_site = NULL; } #ifndef PRODUCT // anybody calling to this stub will trap void ICStub::verify() { } void ICStub::print() { tty->print_cr("ICStub: site: " INTPTR_FORMAT, _ic_site); } #endif //----------------------------------------------------------------------------------------------- // Implementation of InlineCacheBuffer void InlineCacheBuffer::init_next_stub() { ICStub* ic_stub = (ICStub*)buffer()->request_committed (ic_stub_code_size()); assert (ic_stub != NULL, "no room for a single stub"); set_next_stub(ic_stub); } void InlineCacheBuffer::initialize() { if (_buffer != NULL) return; // already initialized _buffer = new StubQueue(new ICStubInterface, 10*K, InlineCacheBuffer_lock, "InlineCacheBuffer"); assert (_buffer != NULL, "cannot allocate InlineCacheBuffer"); init_next_stub(); } ICStub* InlineCacheBuffer::new_ic_stub() { while (true) { ICStub* ic_stub = (ICStub*)buffer()->request_committed(ic_stub_code_size()); if (ic_stub != NULL) { return ic_stub; } // we ran out of inline cache buffer space; must enter safepoint. // We do this by forcing a safepoint EXCEPTION_MARK; VM_ForceSafepoint vfs; VMThread::execute(&vfs); // We could potential get an async. exception at this point. // In that case we will rethrow it to ourselvs. if (HAS_PENDING_EXCEPTION) { oop exception = PENDING_EXCEPTION; CLEAR_PENDING_EXCEPTION; Thread::send_async_exception(JavaThread::current()->threadObj(), exception); } } ShouldNotReachHere(); return NULL; } void InlineCacheBuffer::update_inline_caches() { if (buffer()->number_of_stubs() > 1) { if (TraceICBuffer) { tty->print_cr("[updating inline caches with %d stubs]", buffer()->number_of_stubs()); } buffer()->remove_all(); init_next_stub(); } } bool InlineCacheBuffer::contains(address instruction_address) { return buffer()->contains(instruction_address); } bool InlineCacheBuffer::is_empty() { return buffer()->number_of_stubs() == 1; // always has sentinel } void InlineCacheBuffer_init() { InlineCacheBuffer::initialize(); } void InlineCacheBuffer::create_transition_stub(CompiledIC *ic, oop cached_oop, address entry) { assert(!SafepointSynchronize::is_at_safepoint(), "should not be called during a safepoint"); assert (CompiledIC_lock->is_locked(), ""); assert(cached_oop == NULL || cached_oop->is_perm(), "must belong to perm. space"); if (TraceICBuffer) { tty->print_cr(" create transition stub for " INTPTR_FORMAT, ic->instruction_address()); } // If an transition stub is already associate with the inline cache, then we remove the association. if (ic->is_in_transition_state()) { ICStub* old_stub = ICStub_from_destination_address(ic->stub_address()); old_stub->clear(); } // allocate and initialize new "out-of-line" inline-cache ICStub* ic_stub = get_next_stub(); ic_stub->set_stub(ic, cached_oop, entry); // Update inline cache in nmethod to point to new "out-of-line" allocated inline cache ic->set_ic_destination(ic_stub->code_begin()); set_next_stub(new_ic_stub()); // can cause safepoint synchronization } address InlineCacheBuffer::ic_destination_for(CompiledIC *ic) { ICStub* stub = ICStub_from_destination_address(ic->stub_address()); return stub->destination(); } oop InlineCacheBuffer::cached_oop_for(CompiledIC *ic) { ICStub* stub = ICStub_from_destination_address(ic->stub_address()); return stub->cached_oop(); }