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comparison src/share/vm/runtime/sweeper.cpp @ 941:8b46c4d82093

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4957990: Perm heap bloat in JVM Summary: Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately. Reviewed-by: jcoomes, jmasa, kvn, never
author ysr
date Wed, 02 Sep 2009 00:04:29 -0700
parents a61af66fc99e
children 89e0543e1737 54b3b351d6f9
comparison
equal deleted inserted replaced
940:8624da129f0b 941:8b46c4d82093
123 // If it is first time, we see nmethod then we mark it. Otherwise, 123 // If it is first time, we see nmethod then we mark it. Otherwise,
124 // we reclame it. When we have seen a zombie method twice, we know that 124 // we reclame it. When we have seen a zombie method twice, we know that
125 // there are no inline caches that referes to it. 125 // there are no inline caches that referes to it.
126 if (nm->is_marked_for_reclamation()) { 126 if (nm->is_marked_for_reclamation()) {
127 assert(!nm->is_locked_by_vm(), "must not flush locked nmethods"); 127 assert(!nm->is_locked_by_vm(), "must not flush locked nmethods");
128 if (PrintMethodFlushing && Verbose) {
129 tty->print_cr("### Nmethod 0x%x (marked for reclamation) being flushed", nm);
130 }
128 nm->flush(); 131 nm->flush();
129 } else { 132 } else {
133 if (PrintMethodFlushing && Verbose) {
134 tty->print_cr("### Nmethod 0x%x (zombie) being marked for reclamation", nm);
135 }
130 nm->mark_for_reclamation(); 136 nm->mark_for_reclamation();
131 _rescan = true; 137 _rescan = true;
132 } 138 }
133 } else if (nm->is_not_entrant()) { 139 } else if (nm->is_not_entrant()) {
134 // If there is no current activations of this method on the 140 // If there is no current activations of this method on the
135 // stack we can safely convert it to a zombie method 141 // stack we can safely convert it to a zombie method
136 if (nm->can_not_entrant_be_converted()) { 142 if (nm->can_not_entrant_be_converted()) {
143 if (PrintMethodFlushing && Verbose) {
144 tty->print_cr("### Nmethod 0x%x (not entrant) being made zombie", nm);
145 }
137 nm->make_zombie(); 146 nm->make_zombie();
138 _rescan = true; 147 _rescan = true;
139 } else { 148 } else {
140 // Still alive, clean up its inline caches 149 // Still alive, clean up its inline caches
141 nm->cleanup_inline_caches(); 150 nm->cleanup_inline_caches();
144 // long time we don't want to keep rescanning at every safepoint. 153 // long time we don't want to keep rescanning at every safepoint.
145 _not_entrant_seen_on_stack++; 154 _not_entrant_seen_on_stack++;
146 } 155 }
147 } else if (nm->is_unloaded()) { 156 } else if (nm->is_unloaded()) {
148 // Unloaded code, just make it a zombie 157 // Unloaded code, just make it a zombie
149 if (nm->is_osr_only_method()) { 158 if (PrintMethodFlushing && Verbose)
159 tty->print_cr("### Nmethod 0x%x (unloaded) being made zombie", nm);
160 if (nm->is_osr_method()) {
150 // No inline caches will ever point to osr methods, so we can just remove it 161 // No inline caches will ever point to osr methods, so we can just remove it
151 nm->flush(); 162 nm->flush();
152 } else { 163 } else {
153 nm->make_zombie(); 164 nm->make_zombie();
154 _rescan = true; 165 _rescan = true;