79 80 _last_gc_cause 81 }; 82 83 inline static bool is_user_requested_gc(GCCause::Cause cause) { 84 return (cause == GCCause::_java_lang_system_gc || 85 cause == GCCause::_dcmd_gc_run); 86 } 87 88 inline static bool is_serviceability_requested_gc(GCCause::Cause 89 cause) { 90 return (cause == GCCause::_jvmti_force_gc || 91 cause == GCCause::_heap_inspection || 92 cause == GCCause::_heap_dump); 93 } 94 95 // Causes for collection of the tenured gernation 96 inline static bool is_tenured_allocation_failure_gc(GCCause::Cause cause) { 97 assert(cause != GCCause::_old_generation_too_full_to_scavenge && 98 cause != GCCause::_old_generation_expanded_on_last_scavenge, 99 err_msg("This GCCause may be correct but is not expected yet: %s", 100 to_string(cause))); 101 // _tenured_generation_full or _cms_generation_full for full tenured generations 102 // _adaptive_size_policy for a full collection after a young GC 103 // _allocation_failure is the generic cause a collection which could result 104 // in the collection of the tenured generation if there is not enough space 105 // in the tenured generation to support a young GC. 106 // _last_ditch_collection is a collection done to include SoftReferences. 107 return (cause == GCCause::_tenured_generation_full || 108 cause == GCCause::_cms_generation_full || 109 cause == GCCause::_adaptive_size_policy || 110 cause == GCCause::_allocation_failure || 111 cause == GCCause::_last_ditch_collection); 112 } 113 114 // Causes for collection of the young generation 115 inline static bool is_allocation_failure_gc(GCCause::Cause cause) { 116 // _allocation_failure is the generic cause a collection for allocation failure 117 // _adaptive_size_policy is for a collecton done before a full GC 118 // _last_ditch_collection is a collection done to include SoftReferences. 119 return (cause == GCCause::_allocation_failure || 120 cause == GCCause::_adaptive_size_policy || 124 // Return a string describing the GCCause. 125 static const char* to_string(GCCause::Cause cause); 126 }; 127 128 // Helper class for doing logging that includes the GC Cause 129 // as a string. 130 class GCCauseString : StackObj { 131 private: 132 static const int _length = 128; 133 char _buffer[_length]; 134 int _position; 135 136 public: 137 GCCauseString(const char* prefix, GCCause::Cause cause) { 138 if (PrintGCCause) { 139 _position = jio_snprintf(_buffer, _length, "%s (%s) ", prefix, GCCause::to_string(cause)); 140 } else { 141 _position = jio_snprintf(_buffer, _length, "%s ", prefix); 142 } 143 assert(_position >= 0 && _position <= _length, 144 err_msg("Need to increase the buffer size in GCCauseString? %d", _position)); 145 } 146 147 GCCauseString& append(const char* str) { 148 int res = jio_snprintf(_buffer + _position, _length - _position, "%s", str); 149 _position += res; 150 assert(res >= 0 && _position <= _length, 151 err_msg("Need to increase the buffer size in GCCauseString? %d", res)); 152 return *this; 153 } 154 155 operator const char*() { 156 return _buffer; 157 } 158 }; 159 160 #endif // SHARE_VM_GC_SHARED_GCCAUSE_HPP | 79 80 _last_gc_cause 81 }; 82 83 inline static bool is_user_requested_gc(GCCause::Cause cause) { 84 return (cause == GCCause::_java_lang_system_gc || 85 cause == GCCause::_dcmd_gc_run); 86 } 87 88 inline static bool is_serviceability_requested_gc(GCCause::Cause 89 cause) { 90 return (cause == GCCause::_jvmti_force_gc || 91 cause == GCCause::_heap_inspection || 92 cause == GCCause::_heap_dump); 93 } 94 95 // Causes for collection of the tenured gernation 96 inline static bool is_tenured_allocation_failure_gc(GCCause::Cause cause) { 97 assert(cause != GCCause::_old_generation_too_full_to_scavenge && 98 cause != GCCause::_old_generation_expanded_on_last_scavenge, 99 "This GCCause may be correct but is not expected yet: %s", 100 to_string(cause)); 101 // _tenured_generation_full or _cms_generation_full for full tenured generations 102 // _adaptive_size_policy for a full collection after a young GC 103 // _allocation_failure is the generic cause a collection which could result 104 // in the collection of the tenured generation if there is not enough space 105 // in the tenured generation to support a young GC. 106 // _last_ditch_collection is a collection done to include SoftReferences. 107 return (cause == GCCause::_tenured_generation_full || 108 cause == GCCause::_cms_generation_full || 109 cause == GCCause::_adaptive_size_policy || 110 cause == GCCause::_allocation_failure || 111 cause == GCCause::_last_ditch_collection); 112 } 113 114 // Causes for collection of the young generation 115 inline static bool is_allocation_failure_gc(GCCause::Cause cause) { 116 // _allocation_failure is the generic cause a collection for allocation failure 117 // _adaptive_size_policy is for a collecton done before a full GC 118 // _last_ditch_collection is a collection done to include SoftReferences. 119 return (cause == GCCause::_allocation_failure || 120 cause == GCCause::_adaptive_size_policy || 124 // Return a string describing the GCCause. 125 static const char* to_string(GCCause::Cause cause); 126 }; 127 128 // Helper class for doing logging that includes the GC Cause 129 // as a string. 130 class GCCauseString : StackObj { 131 private: 132 static const int _length = 128; 133 char _buffer[_length]; 134 int _position; 135 136 public: 137 GCCauseString(const char* prefix, GCCause::Cause cause) { 138 if (PrintGCCause) { 139 _position = jio_snprintf(_buffer, _length, "%s (%s) ", prefix, GCCause::to_string(cause)); 140 } else { 141 _position = jio_snprintf(_buffer, _length, "%s ", prefix); 142 } 143 assert(_position >= 0 && _position <= _length, 144 "Need to increase the buffer size in GCCauseString? %d", _position); 145 } 146 147 GCCauseString& append(const char* str) { 148 int res = jio_snprintf(_buffer + _position, _length - _position, "%s", str); 149 _position += res; 150 assert(res >= 0 && _position <= _length, 151 "Need to increase the buffer size in GCCauseString? %d", res); 152 return *this; 153 } 154 155 operator const char*() { 156 return _buffer; 157 } 158 }; 159 160 #endif // SHARE_VM_GC_SHARED_GCCAUSE_HPP |