Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/code/nmethod.cpp
src/share/vm/code/nmethod.cpp
- changeset 8074
- c1950f51ed60
- parent 8073
- 682119c4c32e
- child 8075
- be740540f60c
equal
deleted
inserted
replaced
| 8073:682119c4c32e | 8074:c1950f51ed60 |
|---|---|
| 1160 } | 1160 } |
| 1161 } | 1161 } |
| 1162 | 1162 |
| 1163 | 1163 |
| 1164 void nmethod::cleanup_inline_caches() { | 1164 void nmethod::cleanup_inline_caches() { |
| 1165 | |
| 1166 assert_locked_or_safepoint(CompiledIC_lock); | 1165 assert_locked_or_safepoint(CompiledIC_lock); |
| 1167 | 1166 |
| 1168 // If the method is not entrant or zombie then a JMP is plastered over the | 1167 // If the method is not entrant or zombie then a JMP is plastered over the |
| 1169 // first few bytes. If an oop in the old code was there, that oop | 1168 // first few bytes. If an oop in the old code was there, that oop |
| 1170 // should not get GC'd. Skip the first few bytes of oops on | 1169 // should not get GC'd. Skip the first few bytes of oops on |
| 1176 // This means that the low_boundary is going to be a little too high. | 1175 // This means that the low_boundary is going to be a little too high. |
| 1177 // This shouldn't matter, since oops of non-entrant methods are never used. | 1176 // This shouldn't matter, since oops of non-entrant methods are never used. |
| 1178 // In fact, why are we bothering to look at oops in a non-entrant method?? | 1177 // In fact, why are we bothering to look at oops in a non-entrant method?? |
| 1179 } | 1178 } |
| 1180 | 1179 |
| 1181 // Find all calls in an nmethod, and clear the ones that points to zombie methods | 1180 // Find all calls in an nmethod and clear the ones that point to non-entrant, |
| 1181 // zombie and unloaded nmethods. | |
| 1182 ResourceMark rm; | 1182 ResourceMark rm; |
| 1183 RelocIterator iter(this, low_boundary); | 1183 RelocIterator iter(this, low_boundary); |
| 1184 while(iter.next()) { | 1184 while(iter.next()) { |
| 1185 switch(iter.type()) { | 1185 switch(iter.type()) { |
| 1186 case relocInfo::virtual_call_type: | 1186 case relocInfo::virtual_call_type: |
| 1188 CompiledIC *ic = CompiledIC_at(&iter); | 1188 CompiledIC *ic = CompiledIC_at(&iter); |
| 1189 // Ok, to lookup references to zombies here | 1189 // Ok, to lookup references to zombies here |
| 1190 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); | 1190 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); |
| 1191 if( cb != NULL && cb->is_nmethod() ) { | 1191 if( cb != NULL && cb->is_nmethod() ) { |
| 1192 nmethod* nm = (nmethod*)cb; | 1192 nmethod* nm = (nmethod*)cb; |
| 1193 // Clean inline caches pointing to both zombie and not_entrant methods | 1193 // Clean inline caches pointing to zombie, non-entrant and unloaded methods |
| 1194 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); | 1194 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean(); |
| 1195 } | 1195 } |
| 1196 break; | 1196 break; |
| 1197 } | 1197 } |
| 1198 case relocInfo::static_call_type: { | 1198 case relocInfo::static_call_type: { |
| 1199 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); | 1199 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); |
| 1200 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); | 1200 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); |
| 1201 if( cb != NULL && cb->is_nmethod() ) { | 1201 if( cb != NULL && cb->is_nmethod() ) { |
| 1202 nmethod* nm = (nmethod*)cb; | 1202 nmethod* nm = (nmethod*)cb; |
| 1203 // Clean inline caches pointing to both zombie and not_entrant methods | 1203 // Clean inline caches pointing to zombie, non-entrant and unloaded methods |
| 1204 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); | 1204 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean(); |
| 1205 } | 1205 } |
| 1206 break; | 1206 break; |
| 1207 } | 1207 } |
| 1208 } | 1208 } |
| 2705 void nmethod::verify() { | 2705 void nmethod::verify() { |
| 2706 | 2706 |
| 2707 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant | 2707 // Hmm. OSR methods can be deopted but not marked as zombie or not_entrant |
| 2708 // seems odd. | 2708 // seems odd. |
| 2709 | 2709 |
| 2710 if( is_zombie() || is_not_entrant() ) | 2710 if (is_zombie() || is_not_entrant() || is_unloaded()) |
| 2711 return; | 2711 return; |
| 2712 | 2712 |
| 2713 // Make sure all the entry points are correctly aligned for patching. | 2713 // Make sure all the entry points are correctly aligned for patching. |
| 2714 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); | 2714 NativeJump::check_verified_entry_alignment(entry_point(), verified_entry_point()); |
| 2715 | 2715 |
