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comparison src/share/vm/runtime/thread.cpp @ 192:6d13fcb3663f

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6714404: Add UseStringCache switch to enable String caching under AggressiveOpts Summary: Poke String.stringCacheEnabled during vm initialization Reviewed-by: never
author kvn
date Fri, 13 Jun 2008 14:49:07 -0700
parents cd0742ba123c
children d1605aabd0a1 69fefd031e6c
comparison
equal deleted inserted replaced
191:3ad4bacbcdbe 192:6d13fcb3663f
2924 } else { 2924 } else {
2925 warning("java.lang.String not initialized"); 2925 warning("java.lang.String not initialized");
2926 } 2926 }
2927 2927
2928 if (AggressiveOpts) { 2928 if (AggressiveOpts) {
2929 // Forcibly initialize java/util/HashMap and mutate the private 2929 {
2930 // static final "frontCacheEnabled" field before we start creating instances 2930 // Forcibly initialize java/util/HashMap and mutate the private
2931 // static final "frontCacheEnabled" field before we start creating instances
2931 #ifdef ASSERT 2932 #ifdef ASSERT
2932 klassOop tmp_k = SystemDictionary::find(vmSymbolHandles::java_util_HashMap(), Handle(), Handle(), CHECK_0); 2933 klassOop tmp_k = SystemDictionary::find(vmSymbolHandles::java_util_HashMap(), Handle(), Handle(), CHECK_0);
2933 assert(tmp_k == NULL, "java/util/HashMap should not be loaded yet"); 2934 assert(tmp_k == NULL, "java/util/HashMap should not be loaded yet");
2934 #endif 2935 #endif
2935 klassOop k_o = SystemDictionary::resolve_or_null(vmSymbolHandles::java_util_HashMap(), Handle(), Handle(), CHECK_0); 2936 klassOop k_o = SystemDictionary::resolve_or_null(vmSymbolHandles::java_util_HashMap(), Handle(), Handle(), CHECK_0);
2936 KlassHandle k = KlassHandle(THREAD, k_o); 2937 KlassHandle k = KlassHandle(THREAD, k_o);
2937 guarantee(k.not_null(), "Must find java/util/HashMap"); 2938 guarantee(k.not_null(), "Must find java/util/HashMap");
2938 instanceKlassHandle ik = instanceKlassHandle(THREAD, k()); 2939 instanceKlassHandle ik = instanceKlassHandle(THREAD, k());
2939 ik->initialize(CHECK_0); 2940 ik->initialize(CHECK_0);
2940 fieldDescriptor fd; 2941 fieldDescriptor fd;
2941 // Possible we might not find this field; if so, don't break 2942 // Possible we might not find this field; if so, don't break
2942 if (ik->find_local_field(vmSymbols::frontCacheEnabled_name(), vmSymbols::bool_signature(), &fd)) { 2943 if (ik->find_local_field(vmSymbols::frontCacheEnabled_name(), vmSymbols::bool_signature(), &fd)) {
2943 k()->bool_field_put(fd.offset(), true); 2944 k()->bool_field_put(fd.offset(), true);
2945 }
2946 }
2947
2948 if (UseStringCache) {
2949 // Forcibly initialize java/lang/String and mutate the private
2950 // static final "stringCacheEnabled" field before we start creating instances
2951 #ifdef ASSERT
2952 klassOop tmp_k = SystemDictionary::find(vmSymbolHandles::java_lang_String(), Handle(), Handle(), CHECK_0);
2953 assert(tmp_k == NULL, "java/lang/String should not be loaded yet");
2954 #endif
2955 klassOop k_o = SystemDictionary::resolve_or_null(vmSymbolHandles::java_lang_String(), Handle(), Handle(), CHECK_0);
2956 KlassHandle k = KlassHandle(THREAD, k_o);
2957 guarantee(k.not_null(), "Must find java/lang/String");
2958 instanceKlassHandle ik = instanceKlassHandle(THREAD, k());
2959 ik->initialize(CHECK_0);
2960 fieldDescriptor fd;
2961 // Possible we might not find this field; if so, don't break
2962 if (ik->find_local_field(vmSymbols::stringCacheEnabled_name(), vmSymbols::bool_signature(), &fd)) {
2963 k()->bool_field_put(fd.offset(), true);
2964 }
2944 } 2965 }
2945 } 2966 }
2946 2967
2947 // Initialize java_lang.System (needed before creating the thread) 2968 // Initialize java_lang.System (needed before creating the thread)
2948 if (InitializeJavaLangSystem) { 2969 if (InitializeJavaLangSystem) {