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comparison src/share/vm/services/gcNotifier.cpp @ 3829:87e40b34bc2b

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7074579: G1: JVM crash with JDK7 running ATG CRMDemo Fusion App Summary: Handlize MemoryUsage klass oop in createGCInfo routine Reviewed-by: tonyp, fparain, ysr, jcoomes
author johnc
date Thu, 11 Aug 2011 11:36:29 -0700
parents 78542e2b5e35
children bf864f701a4a
comparison
equal deleted inserted replaced
3828:e9db47a083cc 3829:87e40b34bc2b
90 vmSymbols::getGcInfoBuilder_name(), 90 vmSymbols::getGcInfoBuilder_name(),
91 vmSymbols::getGcInfoBuilder_signature(), 91 vmSymbols::getGcInfoBuilder_signature(),
92 &args, 92 &args,
93 CHECK_NH); 93 CHECK_NH);
94 return Handle(THREAD,(oop)result.get_jobject()); 94 return Handle(THREAD,(oop)result.get_jobject());
95
96 } 95 }
97 96
98 static Handle createGcInfo(GCMemoryManager *gcManager, GCStatInfo *gcStatInfo,TRAPS) { 97 static Handle createGcInfo(GCMemoryManager *gcManager, GCStatInfo *gcStatInfo,TRAPS) {
99 98
100 // Fill the arrays of MemoryUsage objects with before and after GC 99 // Fill the arrays of MemoryUsage objects with before and after GC
101 // per pool memory usage 100 // per pool memory usage
102 101
103 klassOop muKlass = Management::java_lang_management_MemoryUsage_klass(CHECK_NH); objArrayOop bu = oopFactory::new_objArray( muKlass,MemoryService::num_memory_pools(), CHECK_NH); 102 klassOop mu_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_NH);
103 instanceKlassHandle mu_kh(THREAD, mu_klass);
104
105 // The array allocations below should use a handle containing mu_klass
106 // as the first allocation could trigger a GC, causing the actual
107 // klass oop to move, and leaving mu_klass pointing to the old
108 // location.
109 objArrayOop bu = oopFactory::new_objArray(mu_kh(), MemoryService::num_memory_pools(), CHECK_NH);
104 objArrayHandle usage_before_gc_ah(THREAD, bu); 110 objArrayHandle usage_before_gc_ah(THREAD, bu);
105 objArrayOop au = oopFactory::new_objArray(muKlass,MemoryService::num_memory_pools(), CHECK_NH); 111 objArrayOop au = oopFactory::new_objArray(mu_kh(), MemoryService::num_memory_pools(), CHECK_NH);
106 objArrayHandle usage_after_gc_ah(THREAD, au); 112 objArrayHandle usage_after_gc_ah(THREAD, au);
107 113
108 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { 114 for (int i = 0; i < MemoryService::num_memory_pools(); i++) {
109 Handle before_usage = MemoryService::create_MemoryUsage_obj(gcStatInfo->before_gc_usage_for_pool(i), CHECK_NH); 115 Handle before_usage = MemoryService::create_MemoryUsage_obj(gcStatInfo->before_gc_usage_for_pool(i), CHECK_NH);
110 Handle after_usage; 116 Handle after_usage;
124 130
125 // Current implementation only has 1 attribute (number of GC threads) 131 // Current implementation only has 1 attribute (number of GC threads)
126 // The type is 'I' 132 // The type is 'I'
127 objArrayOop extra_args_array = oopFactory::new_objArray(SystemDictionary::Integer_klass(), 1, CHECK_NH); 133 objArrayOop extra_args_array = oopFactory::new_objArray(SystemDictionary::Integer_klass(), 1, CHECK_NH);
128 objArrayHandle extra_array (THREAD, extra_args_array); 134 objArrayHandle extra_array (THREAD, extra_args_array);
129 klassOop itKlass= SystemDictionary::Integer_klass(); 135 klassOop itKlass = SystemDictionary::Integer_klass();
130 instanceKlassHandle intK(THREAD, itKlass); 136 instanceKlassHandle intK(THREAD, itKlass);
131 137
132 instanceHandle extra_arg_val = intK->allocate_instance_handle(CHECK_NH); 138 instanceHandle extra_arg_val = intK->allocate_instance_handle(CHECK_NH);
133 139
134 { 140 {
145 CHECK_NH); 151 CHECK_NH);
146 } 152 }
147 extra_array->obj_at_put(0,extra_arg_val()); 153 extra_array->obj_at_put(0,extra_arg_val());
148 154
149 klassOop gcInfoklass = Management::com_sun_management_GcInfo_klass(CHECK_NH); 155 klassOop gcInfoklass = Management::com_sun_management_GcInfo_klass(CHECK_NH);
150 instanceKlassHandle ik (THREAD,gcInfoklass); 156 instanceKlassHandle ik(THREAD, gcInfoklass);
151 157
152 Handle gcInfo_instance = ik->allocate_instance_handle(CHECK_NH); 158 Handle gcInfo_instance = ik->allocate_instance_handle(CHECK_NH);
153 159
154 JavaValue constructor_result(T_VOID); 160 JavaValue constructor_result(T_VOID);
155 JavaCallArguments constructor_args(16); 161 JavaCallArguments constructor_args(16);