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comparison src/share/vm/oops/constantPoolKlass.cpp @ 518:0af8b0718fc9

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6692899: CMS: many vm.parallel_class_loading tests fail with assert "missing Printezis mark" Summary: The CMS concurrent precleaning and concurrent marking phases should work around classes that are undergoing redefinition. Reviewed-by: ysr, dcubed
author jmasa
date Sun, 11 Jan 2009 16:58:24 -0800
parents a45484ea312d
children 0fbdb4381b99
comparison
equal deleted inserted replaced
517:e9be0e04635a 518:0af8b0718fc9
23 */ 23 */
24 24
25 # include "incls/_precompiled.incl" 25 # include "incls/_precompiled.incl"
26 # include "incls/_constantPoolKlass.cpp.incl" 26 # include "incls/_constantPoolKlass.cpp.incl"
27 27
28 constantPoolOop constantPoolKlass::allocate(int length, TRAPS) { 28 constantPoolOop constantPoolKlass::allocate(int length, bool is_conc_safe, TRAPS) {
29 int size = constantPoolOopDesc::object_size(length); 29 int size = constantPoolOopDesc::object_size(length);
30 KlassHandle klass (THREAD, as_klassOop()); 30 KlassHandle klass (THREAD, as_klassOop());
31 constantPoolOop c = 31 constantPoolOop c =
32 (constantPoolOop)CollectedHeap::permanent_obj_allocate(klass, size, CHECK_NULL); 32 (constantPoolOop)CollectedHeap::permanent_obj_allocate(klass, size, CHECK_NULL);
33 33
36 c->set_cache(NULL); 36 c->set_cache(NULL);
37 c->set_pool_holder(NULL); 37 c->set_pool_holder(NULL);
38 c->set_flags(0); 38 c->set_flags(0);
39 // only set to non-zero if constant pool is merged by RedefineClasses 39 // only set to non-zero if constant pool is merged by RedefineClasses
40 c->set_orig_length(0); 40 c->set_orig_length(0);
41 // if constant pool may change during RedefineClasses, it is created
42 // unsafe for GC concurrent processing.
43 c->set_is_conc_safe(is_conc_safe);
41 // all fields are initialized; needed for GC 44 // all fields are initialized; needed for GC
42 45
43 // initialize tag array 46 // initialize tag array
44 // Note: cannot introduce constant pool handle before since it is not 47 // Note: cannot introduce constant pool handle before since it is not
45 // completely initialized (no class) -> would cause assertion failure 48 // completely initialized (no class) -> would cause assertion failure
203 addr = cp->cache_addr(); 206 addr = cp->cache_addr();
204 blk->do_oop(addr); 207 blk->do_oop(addr);
205 addr = cp->pool_holder_addr(); 208 addr = cp->pool_holder_addr();
206 blk->do_oop(addr); 209 blk->do_oop(addr);
207 return size; 210 return size;
211 }
212
213 bool constantPoolKlass::oop_is_conc_safe(oop obj) const {
214 assert(obj->is_constantPool(), "must be constantPool");
215 return constantPoolOop(obj)->is_conc_safe();
208 } 216 }
209 217
210 #ifndef SERIALGC 218 #ifndef SERIALGC
211 int constantPoolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { 219 int constantPoolKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) {
212 assert (obj->is_constantPool(), "obj must be constant pool"); 220 assert (obj->is_constantPool(), "obj must be constant pool");