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comparison src/share/vm/classfile/classLoaderData.hpp @ 17935:7384f6a12fc1

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8038212: Method::is_valid_method() check has performance regression impact for stackwalking Summary: Only prune metaspace virtual spaces at safepoint so walking them is safe outside a safepoint. Reviewed-by: mgerdin, mgronlun, hseigel, stefank
author coleenp
date Thu, 15 May 2014 18:23:26 -0400
parents 85318d1fe8fe
children e4a6e7f1b90b
comparison
equal deleted inserted replaced
17934:366c198c896d 17935:7384f6a12fc1
64 // All CLDs (except the null CLD) can be reached by walking _head->_next->... 64 // All CLDs (except the null CLD) can be reached by walking _head->_next->...
65 static ClassLoaderData* _head; 65 static ClassLoaderData* _head;
66 static ClassLoaderData* _unloading; 66 static ClassLoaderData* _unloading;
67 // CMS support. 67 // CMS support.
68 static ClassLoaderData* _saved_head; 68 static ClassLoaderData* _saved_head;
69 static bool _should_purge;
69 70
70 static ClassLoaderData* add(Handle class_loader, bool anonymous, TRAPS); 71 static ClassLoaderData* add(Handle class_loader, bool anonymous, TRAPS);
71 static void post_class_unload_events(void); 72 static void post_class_unload_events(void);
72 public: 73 public:
73 static ClassLoaderData* find_or_create(Handle class_loader, TRAPS); 74 static ClassLoaderData* find_or_create(Handle class_loader, TRAPS);
84 85
85 // CMS support. 86 // CMS support.
86 static void remember_new_clds(bool remember) { _saved_head = (remember ? _head : NULL); } 87 static void remember_new_clds(bool remember) { _saved_head = (remember ? _head : NULL); }
87 static GrowableArray<ClassLoaderData*>* new_clds(); 88 static GrowableArray<ClassLoaderData*>* new_clds();
88 89
90 static void set_should_purge(bool b) { _should_purge = b; }
91 static void purge_if_needed() {
92 // Only purge the CLDG for CMS if concurrent sweep is complete.
93 if (_should_purge) {
94 purge();
95 // reset for next time.
96 set_should_purge(false);
97 }
98 }
99
89 static void dump_on(outputStream * const out) PRODUCT_RETURN; 100 static void dump_on(outputStream * const out) PRODUCT_RETURN;
90 static void dump() { dump_on(tty); } 101 static void dump() { dump_on(tty); }
91 static void verify(); 102 static void verify();
92 103
93 // expensive test for pointer in metaspace for debugging
94 static bool contains(const void* x);
95 #ifndef PRODUCT 104 #ifndef PRODUCT
96 static bool contains_loader_data(ClassLoaderData* loader_data); 105 static bool contains_loader_data(ClassLoaderData* loader_data);
97 #endif 106 #endif
98 107
99 #if INCLUDE_TRACE 108 #if INCLUDE_TRACE