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comparison src/share/vm/code/nmethod.cpp @ 2375:d673ef06fe96

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7028374: race in fix_oop_relocations for scavengeable nmethods Reviewed-by: kvn
author never
date Fri, 18 Mar 2011 15:52:42 -0700
parents fc5ebbb2d1a8
children c7f3d0b4570f
comparison
equal deleted inserted replaced
2370:048f98400b8e 2375:d673ef06fe96
1103 "no active breakpoint"); 1103 "no active breakpoint");
1104 } 1104 }
1105 } 1105 }
1106 1106
1107 1107
1108 void nmethod::verify_oop_relocations() {
1109 // Ensure sure that the code matches the current oop values
1110 RelocIterator iter(this, NULL, NULL);
1111 while (iter.next()) {
1112 if (iter.type() == relocInfo::oop_type) {
1113 oop_Relocation* reloc = iter.oop_reloc();
1114 if (!reloc->oop_is_immediate()) {
1115 reloc->verify_oop_relocation();
1116 }
1117 }
1118 }
1119 }
1120
1121
1108 ScopeDesc* nmethod::scope_desc_at(address pc) { 1122 ScopeDesc* nmethod::scope_desc_at(address pc) {
1109 PcDesc* pd = pc_desc_at(pc); 1123 PcDesc* pd = pc_desc_at(pc);
1110 guarantee(pd != NULL, "scope must be present"); 1124 guarantee(pd != NULL, "scope must be present");
1111 return new ScopeDesc(this, pd->scope_decode_offset(), 1125 return new ScopeDesc(this, pd->scope_decode_offset(),
1112 pd->obj_decode_offset(), pd->should_reexecute(), 1126 pd->obj_decode_offset(), pd->should_reexecute(),
1821 nmethod* cur = _oops_do_mark_nmethods; 1835 nmethod* cur = _oops_do_mark_nmethods;
1822 while (cur != NMETHOD_SENTINEL) { 1836 while (cur != NMETHOD_SENTINEL) {
1823 assert(cur != NULL, "not NULL-terminated"); 1837 assert(cur != NULL, "not NULL-terminated");
1824 nmethod* next = cur->_oops_do_mark_link; 1838 nmethod* next = cur->_oops_do_mark_link;
1825 cur->_oops_do_mark_link = NULL; 1839 cur->_oops_do_mark_link = NULL;
1840 cur->fix_oop_relocations();
1826 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n")); 1841 NOT_PRODUCT(if (TraceScavenge) cur->print_on(tty, "oops_do, unmark\n"));
1827 cur = next; 1842 cur = next;
1828 } 1843 }
1829 void* required = _oops_do_mark_nmethods; 1844 void* required = _oops_do_mark_nmethods;
1830 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required); 1845 void* observed = Atomic::cmpxchg_ptr(NULL, &_oops_do_mark_nmethods, required);