graal-compiler: src/share/vm/gc_interface/collectedHeap.inline.hpp comparison

comparison src/share/vm/gc_interface/collectedHeap.inline.hpp @ 0:a61af66fc99e jdk7-b24

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author	duke
date	Sat, 01 Dec 2007 00:00:00 +0000
parents
children	ba764ed4b6f2

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--1:000000000000
+:a61af66fc99e
+/*
+* Copyright 2001-2007 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.
+*
+*/
+// Inline allocation implementations.
+void CollectedHeap::post_allocation_setup_common(KlassHandle klass,
+HeapWord* obj,
+size_t size) {
+post_allocation_setup_no_klass_install(klass, obj, size);
+post_allocation_install_obj_klass(klass, oop(obj), (int) size);
+}
+void CollectedHeap::post_allocation_setup_no_klass_install(KlassHandle klass,
+HeapWord* objPtr,
+size_t size) {
+oop obj = (oop)objPtr;
+assert(obj != NULL, "NULL object pointer");
+if (UseBiasedLocking && (klass() != NULL)) {
+obj->set_mark(klass->prototype_header());
+} else {
+// May be bootstrapping
+obj->set_mark(markOopDesc::prototype());
+}
+// support low memory notifications (no-op if not enabled)
+LowMemoryDetector::detect_low_memory_for_collected_pools();
+}
+void CollectedHeap::post_allocation_install_obj_klass(KlassHandle klass,
+oop obj,
+int size) {
+// These asserts are kind of complicated because of klassKlass
+// and the beginning of the world.
+assert(klass() != NULL || !Universe::is_fully_initialized(), "NULL klass");
+assert(klass() == NULL || klass()->is_klass(), "not a klass");
+assert(klass() == NULL || klass()->klass_part() != NULL, "not a klass");
+assert(obj != NULL, "NULL object pointer");
+obj->set_klass(klass());
+assert(!Universe::is_fully_initialized() || obj->blueprint() != NULL,
+"missing blueprint");
+// support for JVMTI VMObjectAlloc event (no-op if not enabled)
+JvmtiExport::vm_object_alloc_event_collector(obj);
+if (DTraceAllocProbes) {
+// support for Dtrace object alloc event (no-op most of the time)
+if (klass() != NULL && klass()->klass_part()->name() != NULL) {
+SharedRuntime::dtrace_object_alloc(obj);
+}
+}
+}
+void CollectedHeap::post_allocation_setup_obj(KlassHandle klass,
+HeapWord* obj,
+size_t size) {
+post_allocation_setup_common(klass, obj, size);
+assert(Universe::is_bootstrapping() ||
+!((oop)obj)->blueprint()->oop_is_array(), "must not be an array");
+}
+void CollectedHeap::post_allocation_setup_array(KlassHandle klass,
+HeapWord* obj,
+size_t size,
+int length) {
+// Set array length before posting jvmti object alloc event
+// in post_allocation_setup_common()
+assert(length >= 0, "length should be non-negative");
+((arrayOop)obj)->set_length(length);
+post_allocation_setup_common(klass, obj, size);
+assert(((oop)obj)->blueprint()->oop_is_array(), "must be an array");
+}
+HeapWord* CollectedHeap::common_mem_allocate_noinit(size_t size, bool is_noref, TRAPS) {
+// Clear unhandled oops for memory allocation.  Memory allocation might
+// not take out a lock if from tlab, so clear here.
+CHECK_UNHANDLED_OOPS_ONLY(THREAD->clear_unhandled_oops();)
+if (HAS_PENDING_EXCEPTION) {
+NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending"));
+return NULL;  // caller does a CHECK_0 too
+}
+// We may want to update this, is_noref objects might not be allocated in TLABs.
+HeapWord* result = NULL;
+if (UseTLAB) {
+result = CollectedHeap::allocate_from_tlab(THREAD, size);
+if (result != NULL) {
+assert(!HAS_PENDING_EXCEPTION,
+"Unexpected exception, will result in uninitialized storage");
+return result;
+}
+}
+bool gc_overhead_limit_was_exceeded;
+result = Universe::heap()->mem_allocate(size,
+is_noref,
+false,
+&gc_overhead_limit_was_exceeded);
+if (result != NULL) {
+NOT_PRODUCT(Universe::heap()->
+check_for_non_bad_heap_word_value(result, size));
+assert(!HAS_PENDING_EXCEPTION,
+"Unexpected exception, will result in uninitialized storage");
+return result;
+}
+if (!gc_overhead_limit_was_exceeded) {
+// -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support
+report_java_out_of_memory("Java heap space");
+if (JvmtiExport::should_post_resource_exhausted()) {
+JvmtiExport::post_resource_exhausted(
+JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP,
+"Java heap space");
+}
+THROW_OOP_0(Universe::out_of_memory_error_java_heap());
+} else {
+// -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support
+report_java_out_of_memory("GC overhead limit exceeded");
+if (JvmtiExport::should_post_resource_exhausted()) {
+JvmtiExport::post_resource_exhausted(
+JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR | JVMTI_RESOURCE_EXHAUSTED_JAVA_HEAP,
+"GC overhead limit exceeded");
+}
+THROW_OOP_0(Universe::out_of_memory_error_gc_overhead_limit());
+}
+}
+HeapWord* CollectedHeap::common_mem_allocate_init(size_t size, bool is_noref, TRAPS) {
+HeapWord* obj = common_mem_allocate_noinit(size, is_noref, CHECK_NULL);
+init_obj(obj, size);
+return obj;
+}
+// Need to investigate, do we really want to throw OOM exception here?
+HeapWord* CollectedHeap::common_permanent_mem_allocate_noinit(size_t size, TRAPS) {
+if (HAS_PENDING_EXCEPTION) {
+NOT_PRODUCT(guarantee(false, "Should not allocate with exception pending"));
+return NULL;  // caller does a CHECK_NULL too
+}
+#ifdef ASSERT
+if (CIFireOOMAt > 0 && THREAD->is_Compiler_thread() &&
+++_fire_out_of_memory_count >= CIFireOOMAt) {
+// For testing of OOM handling in the CI throw an OOM and see how
+// it does.  Historically improper handling of these has resulted
+// in crashes which we really don't want to have in the CI.
+THROW_OOP_0(Universe::out_of_memory_error_perm_gen());
+}
+#endif
+HeapWord* result = Universe::heap()->permanent_mem_allocate(size);
+if (result != NULL) {
+NOT_PRODUCT(Universe::heap()->
+check_for_non_bad_heap_word_value(result, size));
+assert(!HAS_PENDING_EXCEPTION,
+"Unexpected exception, will result in uninitialized storage");
+return result;
+}
+// -XX:+HeapDumpOnOutOfMemoryError and -XX:OnOutOfMemoryError support
+report_java_out_of_memory("PermGen space");
+if (JvmtiExport::should_post_resource_exhausted()) {
+JvmtiExport::post_resource_exhausted(
+JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR,
+"PermGen space");
+}
+THROW_OOP_0(Universe::out_of_memory_error_perm_gen());
+}
+HeapWord* CollectedHeap::common_permanent_mem_allocate_init(size_t size, TRAPS) {
+HeapWord* obj = common_permanent_mem_allocate_noinit(size, CHECK_NULL);
+init_obj(obj, size);
+return obj;
+}
+HeapWord* CollectedHeap::allocate_from_tlab(Thread* thread, size_t size) {
+assert(UseTLAB, "should use UseTLAB");
+HeapWord* obj = thread->tlab().allocate(size);
+if (obj != NULL) {
+return obj;
+}
+// Otherwise...
+return allocate_from_tlab_slow(thread, size);
+}
+void CollectedHeap::init_obj(HeapWord* obj, size_t size) {
+assert(obj != NULL, "cannot initialize NULL object");
+const size_t hs = oopDesc::header_size();
+assert(size >= hs, "unexpected object size");
+Copy::fill_to_aligned_words(obj + hs, size - hs);
+}
+oop CollectedHeap::obj_allocate(KlassHandle klass, int size, TRAPS) {
+debug_only(check_for_valid_allocation_state());
+assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed");
+assert(size >= 0, "int won't convert to size_t");
+HeapWord* obj = common_mem_allocate_init(size, false, CHECK_NULL);
+post_allocation_setup_obj(klass, obj, size);
+NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size));
+return (oop)obj;
+}
+oop CollectedHeap::array_allocate(KlassHandle klass,
+int size,
+int length,
+TRAPS) {
+debug_only(check_for_valid_allocation_state());
+assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed");
+assert(size >= 0, "int won't convert to size_t");
+HeapWord* obj = common_mem_allocate_init(size, false, CHECK_NULL);
+post_allocation_setup_array(klass, obj, size, length);
+NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size));
+return (oop)obj;
+}
+oop CollectedHeap::large_typearray_allocate(KlassHandle klass,
+int size,
+int length,
+TRAPS) {
+debug_only(check_for_valid_allocation_state());
+assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed");
+assert(size >= 0, "int won't convert to size_t");
+HeapWord* obj = common_mem_allocate_init(size, true, CHECK_NULL);
+post_allocation_setup_array(klass, obj, size, length);
+NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size));
+return (oop)obj;
+}
+oop CollectedHeap::permanent_obj_allocate(KlassHandle klass, int size, TRAPS) {
+oop obj = permanent_obj_allocate_no_klass_install(klass, size, CHECK_NULL);
+post_allocation_install_obj_klass(klass, obj, size);
+NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value((HeapWord*) obj,
+size));
+return obj;
+}
+oop CollectedHeap::permanent_obj_allocate_no_klass_install(KlassHandle klass,
+int size,
+TRAPS) {
+debug_only(check_for_valid_allocation_state());
+assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed");
+assert(size >= 0, "int won't convert to size_t");
+HeapWord* obj = common_permanent_mem_allocate_init(size, CHECK_NULL);
+post_allocation_setup_no_klass_install(klass, obj, size);
+NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size));
+return (oop)obj;
+}
+oop CollectedHeap::permanent_array_allocate(KlassHandle klass,
+int size,
+int length,
+TRAPS) {
+debug_only(check_for_valid_allocation_state());
+assert(!Universe::heap()->is_gc_active(), "Allocation during gc not allowed");
+assert(size >= 0, "int won't convert to size_t");
+HeapWord* obj = common_permanent_mem_allocate_init(size, CHECK_NULL);
+post_allocation_setup_array(klass, obj, size, length);
+NOT_PRODUCT(Universe::heap()->check_for_bad_heap_word_value(obj, size));
+return (oop)obj;
+}
+// Returns "TRUE" if "p" is a method oop in the
+// current heap with high probability. NOTE: The main
+// current consumers of this interface are Forte::
+// and ThreadProfiler::. In these cases, the
+// interpreter frame from which "p" came, may be
+// under construction when sampled asynchronously, so
+// the clients want to check that it represents a
+// valid method before using it. Nonetheless since
+// the clients do not typically lock out GC, the
+// predicate is_valid_method() is not stable, so
+// it is possible that by the time "p" is used, it
+// is no longer valid.
+inline bool CollectedHeap::is_valid_method(oop p) const {
+return
+p != NULL &&
+// Check whether it is aligned at a HeapWord boundary.
+Space::is_aligned(p) &&
+// Check whether "method" is in the allocated part of the
+// permanent generation -- this needs to be checked before
+// p->klass() below to avoid a SEGV (but see below
+// for a potential window of vulnerability).
+is_permanent((void*)p) &&
+// See if GC is active; however, there is still an
+// apparently unavoidable window after this call
+// and before the client of this interface uses "p".
+// If the client chooses not to lock out GC, then
+// it's a risk the client must accept.
+!is_gc_active() &&
+// Check that p is a methodOop.
+p->klass() == Universe::methodKlassObj();
+}
+#ifndef PRODUCT
+inline bool
+CollectedHeap::promotion_should_fail(volatile size_t* count) {
+// Access to count is not atomic; the value does not have to be exact.
+if (PromotionFailureALot) {
+const size_t gc_num = total_collections();
+const size_t elapsed_gcs = gc_num - _promotion_failure_alot_gc_number;
+if (elapsed_gcs >= PromotionFailureALotInterval) {
+// Test for unsigned arithmetic wrap-around.
+if (++*count >= PromotionFailureALotCount) {
+*count = 0;
+return true;
+}
+}
+}
+return false;
+}
+inline bool CollectedHeap::promotion_should_fail() {
+return promotion_should_fail(&_promotion_failure_alot_count);
+}
+inline void CollectedHeap::reset_promotion_should_fail(volatile size_t* count) {
+if (PromotionFailureALot) {
+_promotion_failure_alot_gc_number = total_collections();
+*count = 0;
+}
+}
+inline void CollectedHeap::reset_promotion_should_fail() {
+reset_promotion_should_fail(&_promotion_failure_alot_count);
+}
+#endif  // #ifndef PRODUCT

Mercurial > hg > graal-compiler

comparison src/share/vm/gc_interface/collectedHeap.inline.hpp @ 0:a61af66fc99e jdk7-b24