1148     signed char old_state = Atomic::load(&_state);

  1148     signed char old_state = Atomic::load(&_state);

  1149     if (old_state >= new_state) {

  1149     if (old_state >= new_state) {

  1150       // Ensure monotonicity of transitions.

  1150       // Ensure monotonicity of transitions.

  1151       return false;

  1151       return false;

  1152     }

  1152     }

  1154       return true;

  1154       return true;

  1155     }

  1155     }

  1156   }

  1156   }

  1157 }

  1157 }

  1158 

  1158 

  1847 

  1847 

  1848 bool nmethod::oops_do_try_claim_weak_request() {

  1848 bool nmethod::oops_do_try_claim_weak_request() {

  1849   assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");

  1849   assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");

  1850 

  1850 

  1851   if ((_oops_do_mark_link == NULL) &&

  1851   if ((_oops_do_mark_link == NULL) &&

  1853     oops_do_log_change("oops_do, mark weak request");

  1853     oops_do_log_change("oops_do, mark weak request");

  1854     return true;

  1854     return true;

  1855   }

  1855   }

  1856   return false;

  1856   return false;

  1857 }

  1857 }

  1861 }

  1861 }

  1862 

  1862 

  1863 nmethod::oops_do_mark_link* nmethod::oops_do_try_claim_strong_done() {

  1863 nmethod::oops_do_mark_link* nmethod::oops_do_try_claim_strong_done() {

  1864   assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");

  1864   assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");

  1865 

  1865 

  1867   if (old_next == NULL) {

  1867   if (old_next == NULL) {

  1868     oops_do_log_change("oops_do, mark strong done");

  1868     oops_do_log_change("oops_do, mark strong done");

  1869   }

  1869   }

  1870   return old_next;

  1870   return old_next;

  1871 }

  1871 }

  1872 

  1872 

  1873 nmethod::oops_do_mark_link* nmethod::oops_do_try_add_strong_request(nmethod::oops_do_mark_link* next) {

  1873 nmethod::oops_do_mark_link* nmethod::oops_do_try_add_strong_request(nmethod::oops_do_mark_link* next) {

  1874   assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");

  1874   assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");

  1875   assert(next == mark_link(this, claim_weak_request_tag), "Should be claimed as weak");

  1875   assert(next == mark_link(this, claim_weak_request_tag), "Should be claimed as weak");

  1876 

  1876 

  1878   if (old_next == next) {

  1878   if (old_next == next) {

  1879     oops_do_log_change("oops_do, mark strong request");

  1879     oops_do_log_change("oops_do, mark strong request");

  1880   }

  1880   }

  1881   return old_next;

  1881   return old_next;

  1882 }

  1882 }

  1883 

  1883 

  1884 bool nmethod::oops_do_try_claim_weak_done_as_strong_done(nmethod::oops_do_mark_link* next) {

  1884 bool nmethod::oops_do_try_claim_weak_done_as_strong_done(nmethod::oops_do_mark_link* next) {

  1885   assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");

  1885   assert(SafepointSynchronize::is_at_safepoint(), "only at safepoint");

  1886   assert(extract_state(next) == claim_weak_done_tag, "Should be claimed as weak done");

  1886   assert(extract_state(next) == claim_weak_done_tag, "Should be claimed as weak done");

  1887 

  1887 

  1889   if (old_next == next) {

  1889   if (old_next == next) {

  1890     oops_do_log_change("oops_do, mark weak done -> mark strong done");

  1890     oops_do_log_change("oops_do, mark weak done -> mark strong done");

  1891     return true;

  1891     return true;

  1892   }

  1892   }

  1893   return false;

  1893   return false;

  1904   // Self-loop if needed.

  1904   // Self-loop if needed.

  1905   if (old_head == NULL) {

  1905   if (old_head == NULL) {

  1906     old_head = this;

  1906     old_head = this;

  1907   }

  1907   }

  1908   // Try to install end of list and weak done tag.

  1908   // Try to install end of list and weak done tag.

  1910     oops_do_log_change("oops_do, mark weak done");

  1910     oops_do_log_change("oops_do, mark weak done");

  1911     return NULL;

  1911     return NULL;

  1912   } else {

  1912   } else {

  1913     return old_head;

  1913     return old_head;

  1914   }

  1914   }