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comparison src/share/vm/code/nmethod.cpp @ 1202:5f24d0319e54

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4360113: Evict nmethods when code cache gets full Summary: Speculatively unload the oldest nmethods when code cache gets full. Reviewed-by: never, kvn Contributed-by: eric.caspole@amd.com
author kvn
date Fri, 29 Jan 2010 09:27:22 -0800
parents 24128c2ffa87
children 18a389214829
comparison
equal deleted inserted replaced
1201:24128c2ffa87 1202:5f24d0319e54
585 _method = method; 585 _method = method;
586 _entry_bci = InvocationEntryBci; 586 _entry_bci = InvocationEntryBci;
587 _osr_link = NULL; 587 _osr_link = NULL;
588 _scavenge_root_link = NULL; 588 _scavenge_root_link = NULL;
589 _scavenge_root_state = 0; 589 _scavenge_root_state = 0;
590 _saved_nmethod_link = NULL;
590 _compiler = NULL; 591 _compiler = NULL;
591 // We have no exception handler or deopt handler make the 592 // We have no exception handler or deopt handler make the
592 // values something that will never match a pc like the nmethod vtable entry 593 // values something that will never match a pc like the nmethod vtable entry
593 _exception_offset = 0; 594 _exception_offset = 0;
594 _deoptimize_offset = 0; 595 _deoptimize_offset = 0;
1031 // Ok, to lookup references to zombies here 1032 // Ok, to lookup references to zombies here
1032 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination()); 1033 CodeBlob *cb = CodeCache::find_blob_unsafe(ic->ic_destination());
1033 if( cb != NULL && cb->is_nmethod() ) { 1034 if( cb != NULL && cb->is_nmethod() ) {
1034 nmethod* nm = (nmethod*)cb; 1035 nmethod* nm = (nmethod*)cb;
1035 // Clean inline caches pointing to both zombie and not_entrant methods 1036 // Clean inline caches pointing to both zombie and not_entrant methods
1036 if (!nm->is_in_use()) ic->set_to_clean(); 1037 if (!nm->is_in_use() || (nm->method()->code() != nm)) ic->set_to_clean();
1037 } 1038 }
1038 break; 1039 break;
1039 } 1040 }
1040 case relocInfo::static_call_type: { 1041 case relocInfo::static_call_type: {
1041 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc()); 1042 CompiledStaticCall *csc = compiledStaticCall_at(iter.reloc());
1042 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination()); 1043 CodeBlob *cb = CodeCache::find_blob_unsafe(csc->destination());
1043 if( cb != NULL && cb->is_nmethod() ) { 1044 if( cb != NULL && cb->is_nmethod() ) {
1044 nmethod* nm = (nmethod*)cb; 1045 nmethod* nm = (nmethod*)cb;
1045 // Clean inline caches pointing to both zombie and not_entrant methods 1046 // Clean inline caches pointing to both zombie and not_entrant methods
1046 if (!nm->is_in_use()) csc->set_to_clean(); 1047 if (!nm->is_in_use() || (nm->method()->code() != nm)) csc->set_to_clean();
1047 } 1048 }
1048 break; 1049 break;
1049 } 1050 }
1050 } 1051 }
1051 } 1052 }
1310 check_safepoint(); 1311 check_safepoint();
1311 1312
1312 // completely deallocate this method 1313 // completely deallocate this method
1313 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, ""); 1314 EventMark m("flushing nmethod " INTPTR_FORMAT " %s", this, "");
1314 if (PrintMethodFlushing) { 1315 if (PrintMethodFlushing) {
1315 tty->print_cr("*flushing nmethod " INTPTR_FORMAT ". Live blobs: %d", this, CodeCache::nof_blobs()); 1316 tty->print_cr("*flushing nmethod %3d/" INTPTR_FORMAT ". Live blobs:" UINT32_FORMAT "/Free CodeCache:" SIZE_FORMAT "Kb",
1317 _compile_id, this, CodeCache::nof_blobs(), CodeCache::unallocated_capacity()/1024);
1316 } 1318 }
1317 1319
1318 // We need to deallocate any ExceptionCache data. 1320 // We need to deallocate any ExceptionCache data.
1319 // Note that we do not need to grab the nmethod lock for this, it 1321 // Note that we do not need to grab the nmethod lock for this, it
1320 // better be thread safe if we're disposing of it! 1322 // better be thread safe if we're disposing of it!
1326 ec = next; 1328 ec = next;
1327 } 1329 }
1328 1330
1329 if (on_scavenge_root_list()) { 1331 if (on_scavenge_root_list()) {
1330 CodeCache::drop_scavenge_root_nmethod(this); 1332 CodeCache::drop_scavenge_root_nmethod(this);
1333 }
1334
1335 if (is_speculatively_disconnected()) {
1336 CodeCache::remove_saved_code(this);
1331 } 1337 }
1332 1338
1333 ((CodeBlob*)(this))->flush(); 1339 ((CodeBlob*)(this))->flush();
1334 1340
1335 CodeCache::free(this); 1341 CodeCache::free(this);