jdk8-mips64-public/hotspot: src/share/vm/oops/oop.inline.hpp@75b0f3cb1943 (annotated)

src/share/vm/oops/oop.inline.hpp@75b0f3cb1943 (annotated)

src/share/vm/oops/oop.inline.hpp

Thu, 13 Mar 2008 14:17:48 -0700

author: dcubed
date: Thu, 13 Mar 2008 14:17:48 -0700
changeset 487: 75b0f3cb1943
parent 435: a61af66fc99e
child 548: ba764ed4b6f2
permissions: -rw-r--r--

Merge

 /*
  * Copyright 1997-2007 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.
  *
  */
 // Implementation of all inlined member functions defined in oop.hpp
 // We need a separate file to avoid circular references
 inline void oopDesc::release_set_mark(markOop m) {
   OrderAccess::release_store_ptr(&_mark, m);
 }
 inline markOop oopDesc::cas_set_mark(markOop new_mark, markOop old_mark) {
   return (markOop) Atomic::cmpxchg_ptr(new_mark, &_mark, old_mark);
 }
 inline void oopDesc::set_klass(klassOop k) {
   // since klasses are promoted no store check is needed
   assert(Universe::is_bootstrapping() || k != NULL, "must be a real klassOop");
   assert(Universe::is_bootstrapping() || k->is_klass(), "not a klassOop");
   oop_store_without_check((oop*) &_klass, (oop) k);
 }
 inline void oopDesc::set_klass_to_list_ptr(oop k) {
   // This is only to be used during GC, for from-space objects, so no
   // barrier is needed.
   _klass = (klassOop)k;
 }
 inline void   oopDesc::init_mark()                 { set_mark(markOopDesc::prototype_for_object(this)); }
 inline Klass* oopDesc::blueprint()           const { return klass()->klass_part(); }
 inline bool oopDesc::is_a(klassOop k)        const { return blueprint()->is_subtype_of(k); }
 inline bool oopDesc::is_instance()           const { return blueprint()->oop_is_instance(); }
 inline bool oopDesc::is_instanceRef()        const { return blueprint()->oop_is_instanceRef(); }
 inline bool oopDesc::is_array()              const { return blueprint()->oop_is_array(); }
 inline bool oopDesc::is_objArray()           const { return blueprint()->oop_is_objArray(); }
 inline bool oopDesc::is_typeArray()          const { return blueprint()->oop_is_typeArray(); }
 inline bool oopDesc::is_javaArray()          const { return blueprint()->oop_is_javaArray(); }
 inline bool oopDesc::is_symbol()             const { return blueprint()->oop_is_symbol(); }
 inline bool oopDesc::is_klass()              const { return blueprint()->oop_is_klass(); }
 inline bool oopDesc::is_thread()             const { return blueprint()->oop_is_thread(); }
 inline bool oopDesc::is_method()             const { return blueprint()->oop_is_method(); }
 inline bool oopDesc::is_constMethod()        const { return blueprint()->oop_is_constMethod(); }
 inline bool oopDesc::is_methodData()         const { return blueprint()->oop_is_methodData(); }
 inline bool oopDesc::is_constantPool()       const { return blueprint()->oop_is_constantPool(); }
 inline bool oopDesc::is_constantPoolCache()  const { return blueprint()->oop_is_constantPoolCache(); }
 inline bool oopDesc::is_compiledICHolder()   const { return blueprint()->oop_is_compiledICHolder(); }
 inline void*     oopDesc::field_base(int offset)        const { return (void*)&((char*)this)[offset]; }
 inline oop*      oopDesc::obj_field_addr(int offset)    const { return (oop*)     field_base(offset); }
 inline jbyte*    oopDesc::byte_field_addr(int offset)   const { return (jbyte*)   field_base(offset); }
 inline jchar*    oopDesc::char_field_addr(int offset)   const { return (jchar*)   field_base(offset); }
 inline jboolean* oopDesc::bool_field_addr(int offset)   const { return (jboolean*)field_base(offset); }
 inline jint*     oopDesc::int_field_addr(int offset)    const { return (jint*)    field_base(offset); }
 inline jshort*   oopDesc::short_field_addr(int offset)  const { return (jshort*)  field_base(offset); }
 inline jlong*    oopDesc::long_field_addr(int offset)   const { return (jlong*)   field_base(offset); }
 inline jfloat*   oopDesc::float_field_addr(int offset)  const { return (jfloat*)  field_base(offset); }
 inline jdouble*  oopDesc::double_field_addr(int offset) const { return (jdouble*) field_base(offset); }
 inline oop oopDesc::obj_field(int offset) const                     { return *obj_field_addr(offset);             }
 inline void oopDesc::obj_field_put(int offset, oop value)           { oop_store(obj_field_addr(offset), value);   }
 inline jbyte oopDesc::byte_field(int offset) const                  { return (jbyte) *byte_field_addr(offset);    }
 inline void oopDesc::byte_field_put(int offset, jbyte contents)     { *byte_field_addr(offset) = (jint) contents; }
 inline jboolean oopDesc::bool_field(int offset) const               { return (jboolean) *bool_field_addr(offset); }
 inline void oopDesc::bool_field_put(int offset, jboolean contents)  { *bool_field_addr(offset) = (jint) contents; }
 inline jchar oopDesc::char_field(int offset) const                  { return (jchar) *char_field_addr(offset);    }
 inline void oopDesc::char_field_put(int offset, jchar contents)     { *char_field_addr(offset) = (jint) contents; }
 inline jint oopDesc::int_field(int offset) const                    { return *int_field_addr(offset);        }
 inline void oopDesc::int_field_put(int offset, jint contents)       { *int_field_addr(offset) = contents;    }
 inline jshort oopDesc::short_field(int offset) const                { return (jshort) *short_field_addr(offset);  }
 inline void oopDesc::short_field_put(int offset, jshort contents)   { *short_field_addr(offset) = (jint) contents;}
 inline jlong oopDesc::long_field(int offset) const                  { return *long_field_addr(offset);       }
 inline void oopDesc::long_field_put(int offset, jlong contents)     { *long_field_addr(offset) = contents;   }
 inline jfloat oopDesc::float_field(int offset) const                { return *float_field_addr(offset);      }
 inline void oopDesc::float_field_put(int offset, jfloat contents)   { *float_field_addr(offset) = contents;  }
 inline jdouble oopDesc::double_field(int offset) const              { return *double_field_addr(offset);     }
 inline void oopDesc::double_field_put(int offset, jdouble contents) { *double_field_addr(offset) = contents; }
 inline oop oopDesc::obj_field_acquire(int offset) const                     { return (oop)OrderAccess::load_ptr_acquire(obj_field_addr(offset)); }
 inline void oopDesc::release_obj_field_put(int offset, oop value)           { oop_store((volatile oop*)obj_field_addr(offset), value);           }
 inline jbyte oopDesc::byte_field_acquire(int offset) const                  { return OrderAccess::load_acquire(byte_field_addr(offset));     }
 inline void oopDesc::release_byte_field_put(int offset, jbyte contents)     { OrderAccess::release_store(byte_field_addr(offset), contents); }
 inline jboolean oopDesc::bool_field_acquire(int offset) const               { return OrderAccess::load_acquire(bool_field_addr(offset));     }
 inline void oopDesc::release_bool_field_put(int offset, jboolean contents)  { OrderAccess::release_store(bool_field_addr(offset), contents); }
 inline jchar oopDesc::char_field_acquire(int offset) const                  { return OrderAccess::load_acquire(char_field_addr(offset));     }
 inline void oopDesc::release_char_field_put(int offset, jchar contents)     { OrderAccess::release_store(char_field_addr(offset), contents); }
 inline jint oopDesc::int_field_acquire(int offset) const                    { return OrderAccess::load_acquire(int_field_addr(offset));      }
 inline void oopDesc::release_int_field_put(int offset, jint contents)       { OrderAccess::release_store(int_field_addr(offset), contents);  }
 inline jshort oopDesc::short_field_acquire(int offset) const                { return (jshort)OrderAccess::load_acquire(short_field_addr(offset)); }
 inline void oopDesc::release_short_field_put(int offset, jshort contents)   { OrderAccess::release_store(short_field_addr(offset), contents);     }
 inline jlong oopDesc::long_field_acquire(int offset) const                  { return OrderAccess::load_acquire(long_field_addr(offset));       }
 inline void oopDesc::release_long_field_put(int offset, jlong contents)     { OrderAccess::release_store(long_field_addr(offset), contents);   }
 inline jfloat oopDesc::float_field_acquire(int offset) const                { return OrderAccess::load_acquire(float_field_addr(offset));      }
 inline void oopDesc::release_float_field_put(int offset, jfloat contents)   { OrderAccess::release_store(float_field_addr(offset), contents);  }
 inline jdouble oopDesc::double_field_acquire(int offset) const              { return OrderAccess::load_acquire(double_field_addr(offset));     }
 inline void oopDesc::release_double_field_put(int offset, jdouble contents) { OrderAccess::release_store(double_field_addr(offset), contents); }
 inline int oopDesc::size_given_klass(Klass* klass)  {
   int lh = klass->layout_helper();
   int s  = lh >> LogHeapWordSize;  // deliver size scaled by wordSize
   // lh is now a value computed at class initialization that may hint
   // at the size.  For instances, this is positive and equal to the
   // size.  For arrays, this is negative and provides log2 of the
   // array element size.  For other oops, it is zero and thus requires
   // a virtual call.
   //
   // We go to all this trouble because the size computation is at the
   // heart of phase 2 of mark-compaction, and called for every object,
   // alive or dead.  So the speed here is equal in importance to the
   // speed of allocation.
   if (lh <= Klass::_lh_neutral_value) {
     // The most common case is instances; fall through if so.
     if (lh < Klass::_lh_neutral_value) {
       // Second most common case is arrays.  We have to fetch the
       // length of the array, shift (multiply) it appropriately,
       // up to wordSize, add the header, and align to object size.
       size_t size_in_bytes;
 #ifdef _M_IA64
       // The Windows Itanium Aug 2002 SDK hoists this load above
       // the check for s < 0.  An oop at the end of the heap will
       // cause an access violation if this load is performed on a non
       // array oop.  Making the reference volatile prohibits this.
       // (%%% please explain by what magic the length is actually fetched!)
       volatile int *array_length;
       array_length = (volatile int *)( (intptr_t)this +
                           arrayOopDesc::length_offset_in_bytes() );
       assert(array_length > 0, "Integer arithmetic problem somewhere");
       // Put into size_t to avoid overflow.
       size_in_bytes = (size_t) array_length;
       size_in_bytes = size_in_bytes << Klass::layout_helper_log2_element_size(lh);
 #else
       size_t array_length = (size_t) ((arrayOop)this)->length();
       size_in_bytes = array_length << Klass::layout_helper_log2_element_size(lh);
 #endif
       size_in_bytes += Klass::layout_helper_header_size(lh);
       // This code could be simplified, but by keeping array_header_in_bytes
       // in units of bytes and doing it this way we can round up just once,
       // skipping the intermediate round to HeapWordSize.  Cast the result
       // of round_to to size_t to guarantee unsigned division == right shift.
       s = (int)((size_t)round_to(size_in_bytes, MinObjAlignmentInBytes) /
         HeapWordSize);
       // UseParNewGC can change the length field of an "old copy" of an object
       // array in the young gen so it indicates the stealable portion of
       // an already copied array. This will cause the first disjunct below
       // to fail if the sizes are computed across such a concurrent change.
       // UseParNewGC also runs with promotion labs (which look like int
       // filler arrays) which are subject to changing their declared size
       // when finally retiring a PLAB; this also can cause the first disjunct
       // to fail for another worker thread that is concurrently walking the block
       // offset table. Both these invariant failures are benign for their
       // current uses; we relax the assertion checking to cover these two cases below:
       //     is_objArray() && is_forwarded()   // covers first scenario above
       //  || is_typeArray()                    // covers second scenario above
       // If and when UseParallelGC uses the same obj array oop stealing/chunking
       // technique, or when G1 is integrated (and currently uses this array chunking
       // technique) we will need to suitably modify the assertion.
       assert((s == klass->oop_size(this)) ||
              (((UseParNewGC || UseParallelGC) &&
                                            Universe::heap()->is_gc_active()) &&
               (is_typeArray() ||
                (is_objArray() && is_forwarded()))),
              "wrong array object size");
     } else {
       // Must be zero, so bite the bullet and take the virtual call.
       s = klass->oop_size(this);
     }
   }
   assert(s % MinObjAlignment == 0, "alignment check");
   assert(s > 0, "Bad size calculated");
   return s;
 }
 inline int oopDesc::size()  {
   return size_given_klass(blueprint());
 }
 inline bool oopDesc::is_parsable() {
   return blueprint()->oop_is_parsable(this);
 }
 inline void update_barrier_set(oop *p, oop v) {
   assert(oopDesc::bs() != NULL, "Uninitialized bs in oop!");
   oopDesc::bs()->write_ref_field(p, v);
 }
 inline void oop_store(oop* p, oop v) {
   if (always_do_update_barrier) {
     oop_store((volatile oop*)p, v);
   } else {
     *p = v;
     update_barrier_set(p, v);
   }
 }
 inline void oop_store(volatile oop* p, oop v) {
   // Used by release_obj_field_put, so use release_store_ptr.
   OrderAccess::release_store_ptr(p, v);
   update_barrier_set((oop *)p, v);
 }
 inline void oop_store_without_check(oop* p, oop v) {
   // XXX YSR FIX ME!!!
   if (always_do_update_barrier) {
    oop_store(p, v);
   } else {
     assert(!Universe::heap()->barrier_set()->write_ref_needs_barrier(p, v),
            "oop store without store check failed");
     *p = v;
   }
 }
 // When it absolutely has to get there.
 inline void oop_store_without_check(volatile oop* p, oop v) {
   // XXX YSR FIX ME!!!
   if (always_do_update_barrier) {
     oop_store(p, v);
   } else {
     assert(!Universe::heap()->barrier_set()->
                       write_ref_needs_barrier((oop *)p, v),
            "oop store without store check failed");
     OrderAccess::release_store_ptr(p, v);
   }
 }
 // Used only for markSweep, scavenging
 inline bool oopDesc::is_gc_marked() const {
   return mark()->is_marked();
 }
 inline bool oopDesc::is_locked() const {
   return mark()->is_locked();
 }
 inline bool oopDesc::is_unlocked() const {
   return mark()->is_unlocked();
 }
 inline bool oopDesc::has_bias_pattern() const {
   return mark()->has_bias_pattern();
 }
 inline bool check_obj_alignment(oop obj) {
   return (intptr_t)obj % MinObjAlignmentInBytes == 0;
 }
 // used only for asserts
 inline bool oopDesc::is_oop(bool ignore_mark_word) const {
   oop obj = (oop) this;
   if (!check_obj_alignment(obj)) return false;
   if (!Universe::heap()->is_in_reserved(obj)) return false;
   // obj is aligned and accessible in heap
   // try to find metaclass cycle safely without seg faulting on bad input
   // we should reach klassKlassObj by following klass link at most 3 times
   for (int i = 0; i < 3; i++) {
     obj = obj->klass();
     // klass should be aligned and in permspace
     if (!check_obj_alignment(obj)) return false;
     if (!Universe::heap()->is_in_permanent(obj)) return false;
   }
   if (obj != Universe::klassKlassObj()) {
     // During a dump, the _klassKlassObj moved to a shared space.
     if (DumpSharedSpaces && Universe::klassKlassObj()->is_shared()) {
       return true;
     }
     return false;
   }
   // Header verification: the mark is typically non-NULL. If we're
   // at a safepoint, it must not be null.
   // Outside of a safepoint, the header could be changing (for example,
   // another thread could be inflating a lock on this object).
   if (ignore_mark_word) {
     return true;
   }
   if (mark() != NULL) {
     return true;
   }
   return !SafepointSynchronize::is_at_safepoint();
 }
 // used only for asserts
 inline bool oopDesc::is_oop_or_null(bool ignore_mark_word) const {
   return this == NULL ? true : is_oop(ignore_mark_word);
 }
 #ifndef PRODUCT
 // used only for asserts
 inline bool oopDesc::is_unlocked_oop() const {
   if (!Universe::heap()->is_in_reserved(this)) return false;
   return mark()->is_unlocked();
 }
 #endif // PRODUCT
 inline void oopDesc::follow_header() {
   MarkSweep::mark_and_push((oop*)&_klass);
 }
 inline void oopDesc::follow_contents() {
   assert (is_gc_marked(), "should be marked");
   blueprint()->oop_follow_contents(this);
 }
 // Used by scavengers
 inline bool oopDesc::is_forwarded() const {
   // The extra heap check is needed since the obj might be locked, in which case the
   // mark would point to a stack location and have the sentinel bit cleared
   return mark()->is_marked();
 }
 // Used by scavengers
 inline void oopDesc::forward_to(oop p) {
   assert(Universe::heap()->is_in_reserved(p),
          "forwarding to something not in heap");
   markOop m = markOopDesc::encode_pointer_as_mark(p);
   assert(m->decode_pointer() == p, "encoding must be reversable");
   set_mark(m);
 }
 // Used by parallel scavengers
 inline bool oopDesc::cas_forward_to(oop p, markOop compare) {
   assert(Universe::heap()->is_in_reserved(p),
          "forwarding to something not in heap");
   markOop m = markOopDesc::encode_pointer_as_mark(p);
   assert(m->decode_pointer() == p, "encoding must be reversable");
   return cas_set_mark(m, compare) == compare;
 }
 // Note that the forwardee is not the same thing as the displaced_mark.
 // The forwardee is used when copying during scavenge and mark-sweep.
 // It does need to clear the low two locking- and GC-related bits.
 inline oop oopDesc::forwardee() const           { return (oop) mark()->decode_pointer(); }
 inline bool oopDesc::has_displaced_mark() const {
   return mark()->has_displaced_mark_helper();
 }
 inline markOop oopDesc::displaced_mark() const {
   return mark()->displaced_mark_helper();
 }
 inline void oopDesc::set_displaced_mark(markOop m) {
   mark()->set_displaced_mark_helper(m);
 }
 // The following method needs to be MT safe.
 inline int oopDesc::age() const {
   assert(!is_forwarded(), "Attempt to read age from forwarded mark");
   if (has_displaced_mark()) {
     return displaced_mark()->age();
   } else {
     return mark()->age();
   }
 }
 inline void oopDesc::incr_age() {
   assert(!is_forwarded(), "Attempt to increment age of forwarded mark");
   if (has_displaced_mark()) {
     set_displaced_mark(displaced_mark()->incr_age());
   } else {
     set_mark(mark()->incr_age());
   }
 }
 inline intptr_t oopDesc::identity_hash() {
   // Fast case; if the object is unlocked and the hash value is set, no locking is needed
   // Note: The mark must be read into local variable to avoid concurrent updates.
   markOop mrk = mark();
   if (mrk->is_unlocked() && !mrk->has_no_hash()) {
     return mrk->hash();
   } else if (mrk->is_marked()) {
     return mrk->hash();
   } else {
     return slow_identity_hash();
   }
 }
 inline void oopDesc::oop_iterate_header(OopClosure* blk) {
   blk->do_oop((oop*)&_klass);
 }
 inline void oopDesc::oop_iterate_header(OopClosure* blk, MemRegion mr) {
   if (mr.contains(&_klass)) blk->do_oop((oop*)&_klass);
 }
 inline int oopDesc::adjust_pointers() {
   debug_only(int check_size = size());
   int s = blueprint()->oop_adjust_pointers(this);
   assert(s == check_size, "should be the same");
   return s;
 }
 inline void oopDesc::adjust_header() {
   MarkSweep::adjust_pointer((oop*)&_klass);
 }
 #define OOP_ITERATE_DEFN(OopClosureType, nv_suffix)                        \
                                                                            \
 inline int oopDesc::oop_iterate(OopClosureType* blk) {                     \
   SpecializationStats::record_call();                                      \
   return blueprint()->oop_oop_iterate##nv_suffix(this, blk);               \
 }                                                                          \
                                                                            \
 inline int oopDesc::oop_iterate(OopClosureType* blk, MemRegion mr) {       \
   SpecializationStats::record_call();                                      \
   return blueprint()->oop_oop_iterate##nv_suffix##_m(this, blk, mr);       \
 }
 ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_ITERATE_DEFN)
 ALL_OOP_OOP_ITERATE_CLOSURES_3(OOP_ITERATE_DEFN)
 inline bool oopDesc::is_shared() const {
   return CompactingPermGenGen::is_shared(this);
 }
 inline bool oopDesc::is_shared_readonly() const {
   return CompactingPermGenGen::is_shared_readonly(this);
 }
 inline bool oopDesc::is_shared_readwrite() const {
   return CompactingPermGenGen::is_shared_readwrite(this);
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/oops/oop.inline.hpp@75b0f3cb1943 (annotated)

src/share/vm/oops/oop.inline.hpp