author | david |
Tue, 29 Sep 2015 11:02:08 +0200 | |
changeset 33105 | 294e48b4f704 |
parent 30764 | fec48bf5a827 |
child 35862 | 411842d0c882 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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#ifndef SHARE_VM_GC_SHARED_COLLECTEDHEAP_INLINE_HPP |
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#define SHARE_VM_GC_SHARED_COLLECTEDHEAP_INLINE_HPP |
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#include "gc/shared/allocTracer.hpp" |
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#include "gc/shared/collectedHeap.hpp" |
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#include "gc/shared/threadLocalAllocBuffer.inline.hpp" |
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#include "memory/universe.hpp" |
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#include "oops/arrayOop.hpp" |
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#include "prims/jvmtiExport.hpp" |
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#include "runtime/sharedRuntime.hpp" |
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#include "runtime/thread.inline.hpp" |
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#include "services/lowMemoryDetector.hpp" |
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#include "utilities/copy.hpp" |
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// Inline allocation implementations. |
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||
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void CollectedHeap::post_allocation_setup_common(KlassHandle klass, |
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HeapWord* obj) { |
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post_allocation_setup_no_klass_install(klass, obj); |
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post_allocation_install_obj_klass(klass, oop(obj)); |
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} |
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void CollectedHeap::post_allocation_setup_no_klass_install(KlassHandle klass, |
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HeapWord* objPtr) { |
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oop obj = (oop)objPtr; |
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assert(obj != NULL, "NULL object pointer"); |
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if (UseBiasedLocking && (klass() != NULL)) { |
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obj->set_mark(klass->prototype_header()); |
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} else { |
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// May be bootstrapping |
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obj->set_mark(markOopDesc::prototype()); |
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} |
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} |
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void CollectedHeap::post_allocation_install_obj_klass(KlassHandle klass, |
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oop obj) { |
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// These asserts are kind of complicated because of klassKlass |
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// and the beginning of the world. |
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assert(klass() != NULL || !Universe::is_fully_initialized(), "NULL klass"); |
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assert(klass() == NULL || klass()->is_klass(), "not a klass"); |
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assert(obj != NULL, "NULL object pointer"); |
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obj->set_klass(klass()); |
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assert(!Universe::is_fully_initialized() || obj->klass() != NULL, |
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"missing klass"); |
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} |
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// Support for jvmti and dtrace |
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inline void post_allocation_notify(KlassHandle klass, oop obj, int size) { |
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// support low memory notifications (no-op if not enabled) |
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LowMemoryDetector::detect_low_memory_for_collected_pools(); |
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// support for JVMTI VMObjectAlloc event (no-op if not enabled) |
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JvmtiExport::vm_object_alloc_event_collector(obj); |
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if (DTraceAllocProbes) { |
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// support for Dtrace object alloc event (no-op most of the time) |
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if (klass() != NULL && klass()->name() != NULL) { |
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SharedRuntime::dtrace_object_alloc(obj, size); |
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} |
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} |
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} |
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void CollectedHeap::post_allocation_setup_obj(KlassHandle klass, |
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HeapWord* obj, |
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int size) { |
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post_allocation_setup_common(klass, obj); |
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assert(Universe::is_bootstrapping() || |
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!((oop)obj)->is_array(), "must not be an array"); |
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// notify jvmti and dtrace |
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post_allocation_notify(klass, (oop)obj, size); |
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} |
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void CollectedHeap::post_allocation_setup_array(KlassHandle klass, |
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HeapWord* obj, |
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int length) { |
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// Set array length before setting the _klass field |
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// in post_allocation_setup_common() because the klass field |
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// indicates that the object is parsable by concurrent GC. |
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assert(length >= 0, "length should be non-negative"); |
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((arrayOop)obj)->set_length(length); |
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post_allocation_setup_common(klass, obj); |
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oop new_obj = (oop)obj; |
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assert(new_obj->is_array(), "must be an array"); |
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// notify jvmti and dtrace (must be after length is set for dtrace) |
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post_allocation_notify(klass, new_obj, new_obj->size()); |
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} |
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HeapWord* CollectedHeap::common_mem_allocate_noinit(KlassHandle klass, size_t size, TRAPS) { |
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// Clear unhandled oops for memory allocation. Memory allocation might |
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// not take out a lock if from tlab, so clear here. |
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CHECK_UNHANDLED_OOPS_ONLY(THREAD->clear_unhandled_oops();) |
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if (HAS_PENDING_EXCEPTION) { |
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NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending")); |
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return NULL; // caller does a CHECK_0 too |
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} |
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HeapWord* result = NULL; |
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if (UseTLAB) { |
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result = allocate_from_tlab(klass, THREAD, size); |
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if (result != NULL) { |
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assert(!HAS_PENDING_EXCEPTION, |
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"Unexpected exception, will result in uninitialized storage"); |
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return result; |
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} |
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} |
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bool gc_overhead_limit_was_exceeded = false; |
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result = Universe::heap()->mem_allocate(size, |
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&gc_overhead_limit_was_exceeded); |
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if (result != NULL) { |
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NOT_PRODUCT(Universe::heap()-> |
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check_for_non_bad_heap_word_value(result, size)); |
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assert(!HAS_PENDING_EXCEPTION, |
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"Unexpected exception, will result in uninitialized storage"); |
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THREAD->incr_allocated_bytes(size * HeapWordSize); |
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AllocTracer::send_allocation_outside_tlab_event(klass, size * HeapWordSize); |
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return result; |
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} |
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if (!gc_overhead_limit_was_exceeded) { |
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// -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
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report_java_out_of_memory("Java heap space"); |
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if (JvmtiExport::should_post_resource_exhausted()) { |
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JvmtiExport::post_resource_exhausted( |
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JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, |
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"Java heap space"); |
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} |
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THROW_OOP_0(Universe::out_of_memory_error_java_heap()); |
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} else { |
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// -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support |
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report_java_out_of_memory("GC overhead limit exceeded"); |
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if (JvmtiExport::should_post_resource_exhausted()) { |
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JvmtiExport::post_resource_exhausted( |
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JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP, |
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"GC overhead limit exceeded"); |
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} |
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THROW_OOP_0(Universe::out_of_memory_error_gc_overhead_limit()); |
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} |
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} |
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HeapWord* CollectedHeap::common_mem_allocate_init(KlassHandle klass, size_t size, TRAPS) { |
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HeapWord* obj = common_mem_allocate_noinit(klass, size, CHECK_NULL); |
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init_obj(obj, size); |
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return obj; |
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} |
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HeapWord* CollectedHeap::allocate_from_tlab(KlassHandle klass, Thread* thread, size_t size) { |
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assert(UseTLAB, "should use UseTLAB"); |
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HeapWord* obj = thread->tlab().allocate(size); |
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if (obj != NULL) { |
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return obj; |
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} |
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// Otherwise... |
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return allocate_from_tlab_slow(klass, thread, size); |
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} |
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void CollectedHeap::init_obj(HeapWord* obj, size_t size) { |
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assert(obj != NULL, "cannot initialize NULL object"); |
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const size_t hs = oopDesc::header_size(); |
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assert(size >= hs, "unexpected object size"); |
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((oop)obj)->set_klass_gap(0); |
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Copy::fill_to_aligned_words(obj + hs, size - hs); |
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} |
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oop CollectedHeap::obj_allocate(KlassHandle klass, int size, TRAPS) { |
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debug_only(check_for_valid_allocation_state()); |
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assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); |
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assert(size >= 0, "int won't convert to size_t"); |
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HeapWord* obj = common_mem_allocate_init(klass, size, CHECK_NULL); |
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post_allocation_setup_obj(klass, obj, size); |
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NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
206 |
return (oop)obj; |
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} |
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oop CollectedHeap::array_allocate(KlassHandle klass, |
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210 |
int size, |
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211 |
int length, |
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212 |
TRAPS) { |
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213 |
debug_only(check_for_valid_allocation_state()); |
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assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); |
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assert(size >= 0, "int won't convert to size_t"); |
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HeapWord* obj = common_mem_allocate_init(klass, size, CHECK_NULL); |
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post_allocation_setup_array(klass, obj, length); |
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NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size)); |
219 |
return (oop)obj; |
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220 |
} |
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oop CollectedHeap::array_allocate_nozero(KlassHandle klass, |
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int size, |
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int length, |
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TRAPS) { |
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debug_only(check_for_valid_allocation_state()); |
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assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed"); |
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assert(size >= 0, "int won't convert to size_t"); |
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HeapWord* obj = common_mem_allocate_noinit(klass, size, CHECK_NULL); |
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((oop)obj)->set_klass_gap(0); |
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post_allocation_setup_array(klass, obj, length); |
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#ifndef PRODUCT |
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const size_t hs = oopDesc::header_size()+1; |
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Universe::heap()->check_for_non_bad_heap_word_value(obj+hs, size-hs); |
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#endif |
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return (oop)obj; |
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} |
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inline HeapWord* CollectedHeap::align_allocation_or_fail(HeapWord* addr, |
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HeapWord* end, |
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unsigned short alignment_in_bytes) { |
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if (alignment_in_bytes <= ObjectAlignmentInBytes) { |
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return addr; |
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} |
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assert(is_ptr_aligned(addr, HeapWordSize), |
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"Address " PTR_FORMAT " is not properly aligned.", p2i(addr)); |
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assert(is_size_aligned(alignment_in_bytes, HeapWordSize), |
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"Alignment size %u is incorrect.", alignment_in_bytes); |
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|
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HeapWord* new_addr = (HeapWord*) align_pointer_up(addr, alignment_in_bytes); |
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size_t padding = pointer_delta(new_addr, addr); |
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|
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if (padding == 0) { |
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return addr; |
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} |
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|
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if (padding < CollectedHeap::min_fill_size()) { |
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padding += alignment_in_bytes / HeapWordSize; |
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assert(padding >= CollectedHeap::min_fill_size(), |
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"alignment_in_bytes %u is expect to be larger " |
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"than the minimum object size", alignment_in_bytes); |
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new_addr = addr + padding; |
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} |
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assert(new_addr > addr, "Unexpected arithmetic overflow " |
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PTR_FORMAT " not greater than " PTR_FORMAT, p2i(new_addr), p2i(addr)); |
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if(new_addr < end) { |
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CollectedHeap::fill_with_object(addr, padding); |
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return new_addr; |
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} else { |
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return NULL; |
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} |
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} |
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|
1 | 276 |
#ifndef PRODUCT |
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inline bool |
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CollectedHeap::promotion_should_fail(volatile size_t* count) { |
|
280 |
// Access to count is not atomic; the value does not have to be exact. |
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281 |
if (PromotionFailureALot) { |
|
282 |
const size_t gc_num = total_collections(); |
|
283 |
const size_t elapsed_gcs = gc_num - _promotion_failure_alot_gc_number; |
|
284 |
if (elapsed_gcs >= PromotionFailureALotInterval) { |
|
285 |
// Test for unsigned arithmetic wrap-around. |
|
286 |
if (++*count >= PromotionFailureALotCount) { |
|
287 |
*count = 0; |
|
288 |
return true; |
|
289 |
} |
|
290 |
} |
|
291 |
} |
|
292 |
return false; |
|
293 |
} |
|
294 |
||
295 |
inline bool CollectedHeap::promotion_should_fail() { |
|
296 |
return promotion_should_fail(&_promotion_failure_alot_count); |
|
297 |
} |
|
298 |
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299 |
inline void CollectedHeap::reset_promotion_should_fail(volatile size_t* count) { |
|
300 |
if (PromotionFailureALot) { |
|
301 |
_promotion_failure_alot_gc_number = total_collections(); |
|
302 |
*count = 0; |
|
303 |
} |
|
304 |
} |
|
305 |
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306 |
inline void CollectedHeap::reset_promotion_should_fail() { |
|
307 |
reset_promotion_should_fail(&_promotion_failure_alot_count); |
|
308 |
} |
|
309 |
#endif // #ifndef PRODUCT |
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#endif // SHARE_VM_GC_SHARED_COLLECTEDHEAP_INLINE_HPP |