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1 /*
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2 * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation. Sun designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Sun in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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22 * CA 95054 USA or visit www.sun.com if you need additional information or
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23 * have any questions.
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24 */
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25
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26 #ifndef _JAVA_JMM_H_
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27 #define _JAVA_JMM_H_
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28
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29 /*
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30 * This is a private interface used by JDK for JVM monitoring
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31 * and management.
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32 *
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33 * Bump the version number when either of the following happens:
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34 *
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35 * 1. There is a change in functions in JmmInterface.
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36 *
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37 * 2. There is a change in the contract between VM and Java classes.
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38 */
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39
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40 #include "jni.h"
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41
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42 #ifdef __cplusplus
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43 extern "C" {
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44 #endif
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45
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46 enum {
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47 JMM_VERSION_1 = 0x20010000,
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48 JMM_VERSION_1_0 = 0x20010000,
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49 JMM_VERSION_1_1 = 0x20010100, // JDK 6
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50 JMM_VERSION_1_2 = 0x20010200, // JDK 7
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51 JMM_VERSION = 0x20010200
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52 };
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53
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54 typedef struct {
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55 unsigned int isLowMemoryDetectionSupported : 1;
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56 unsigned int isCompilationTimeMonitoringSupported : 1;
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57 unsigned int isThreadContentionMonitoringSupported : 1;
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58 unsigned int isCurrentThreadCpuTimeSupported : 1;
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59 unsigned int isOtherThreadCpuTimeSupported : 1;
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60 unsigned int isBootClassPathSupported : 1;
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61 unsigned int isObjectMonitorUsageSupported : 1;
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62 unsigned int isSynchronizerUsageSupported : 1;
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63 unsigned int : 24;
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64 } jmmOptionalSupport;
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65
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66 typedef enum {
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67 JMM_CLASS_LOADED_COUNT = 1, /* Total number of loaded classes */
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68 JMM_CLASS_UNLOADED_COUNT = 2, /* Total number of unloaded classes */
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69 JMM_THREAD_TOTAL_COUNT = 3, /* Total number of threads that have been started */
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70 JMM_THREAD_LIVE_COUNT = 4, /* Current number of live threads */
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71 JMM_THREAD_PEAK_COUNT = 5, /* Peak number of live threads */
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72 JMM_THREAD_DAEMON_COUNT = 6, /* Current number of daemon threads */
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73 JMM_JVM_INIT_DONE_TIME_MS = 7, /* Time when the JVM finished initialization */
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74 JMM_COMPILE_TOTAL_TIME_MS = 8, /* Total accumulated time spent in compilation */
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75 JMM_GC_TIME_MS = 9, /* Total accumulated time spent in collection */
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76 JMM_GC_COUNT = 10, /* Total number of collections */
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77
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78 JMM_INTERNAL_ATTRIBUTE_INDEX = 100,
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79 JMM_CLASS_LOADED_BYTES = 101, /* Number of bytes loaded instance classes */
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80 JMM_CLASS_UNLOADED_BYTES = 102, /* Number of bytes unloaded instance classes */
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81 JMM_TOTAL_CLASSLOAD_TIME_MS = 103, /* Accumulated VM class loader time (TraceClassLoadingTime) */
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82 JMM_VM_GLOBAL_COUNT = 104, /* Number of VM internal flags */
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83 JMM_SAFEPOINT_COUNT = 105, /* Total number of safepoints */
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84 JMM_TOTAL_SAFEPOINTSYNC_TIME_MS = 106, /* Accumulated time spent getting to safepoints */
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85 JMM_TOTAL_STOPPED_TIME_MS = 107, /* Accumulated time spent at safepoints */
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86 JMM_TOTAL_APP_TIME_MS = 108, /* Accumulated time spent in Java application */
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87 JMM_VM_THREAD_COUNT = 109, /* Current number of VM internal threads */
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88 JMM_CLASS_INIT_TOTAL_COUNT = 110, /* Number of classes for which initializers were run */
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89 JMM_CLASS_INIT_TOTAL_TIME_MS = 111, /* Accumulated time spent in class initializers */
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90 JMM_METHOD_DATA_SIZE_BYTES = 112, /* Size of method data in memory */
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91 JMM_CLASS_VERIFY_TOTAL_TIME_MS = 113, /* Accumulated time spent in class verifier */
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92 JMM_SHARED_CLASS_LOADED_COUNT = 114, /* Number of shared classes loaded */
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93 JMM_SHARED_CLASS_UNLOADED_COUNT = 115, /* Number of shared classes unloaded */
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94 JMM_SHARED_CLASS_LOADED_BYTES = 116, /* Number of bytes loaded shared classes */
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95 JMM_SHARED_CLASS_UNLOADED_BYTES = 117, /* Number of bytes unloaded shared classes */
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96
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97 JMM_OS_ATTRIBUTE_INDEX = 200,
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98 JMM_OS_PROCESS_ID = 201, /* Process id of the JVM */
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99 JMM_OS_MEM_TOTAL_PHYSICAL_BYTES = 202, /* Physical memory size */
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100
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101 JMM_GC_EXT_ATTRIBUTE_INFO_SIZE = 401 /* the size of the GC specific attributes for a given GC memory manager */
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102 } jmmLongAttribute;
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103
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104 typedef enum {
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105 JMM_VERBOSE_GC = 21,
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106 JMM_VERBOSE_CLASS = 22,
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107 JMM_THREAD_CONTENTION_MONITORING = 23,
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108 JMM_THREAD_CPU_TIME = 24
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109 } jmmBoolAttribute;
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110
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111
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112 enum {
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113 JMM_THREAD_STATE_FLAG_SUSPENDED = 0x00100000,
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114 JMM_THREAD_STATE_FLAG_NATIVE = 0x00400000
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115 };
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116
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117 #define JMM_THREAD_STATE_FLAG_MASK 0xFFF00000
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118
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119 typedef enum {
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120 JMM_STAT_PEAK_THREAD_COUNT = 801,
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121 JMM_STAT_THREAD_CONTENTION_COUNT = 802,
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122 JMM_STAT_THREAD_CONTENTION_TIME = 803,
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123 JMM_STAT_THREAD_CONTENTION_STAT = 804,
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124 JMM_STAT_PEAK_POOL_USAGE = 805,
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125 JMM_STAT_GC_STAT = 806
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126 } jmmStatisticType;
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127
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128 typedef enum {
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129 JMM_USAGE_THRESHOLD_HIGH = 901,
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130 JMM_USAGE_THRESHOLD_LOW = 902,
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131 JMM_COLLECTION_USAGE_THRESHOLD_HIGH = 903,
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132 JMM_COLLECTION_USAGE_THRESHOLD_LOW = 904
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133 } jmmThresholdType;
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134
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135 /* Should match what is allowed in globals.hpp */
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136 typedef enum {
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137 JMM_VMGLOBAL_TYPE_UNKNOWN = 0,
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138 JMM_VMGLOBAL_TYPE_JBOOLEAN = 1,
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139 JMM_VMGLOBAL_TYPE_JSTRING = 2,
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140 JMM_VMGLOBAL_TYPE_JLONG = 3
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141 } jmmVMGlobalType;
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142
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143 typedef enum {
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144 JMM_VMGLOBAL_ORIGIN_DEFAULT = 1, /* Default value */
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145 JMM_VMGLOBAL_ORIGIN_COMMAND_LINE = 2, /* Set at command line (or JNI invocation) */
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146 JMM_VMGLOBAL_ORIGIN_MANAGEMENT = 3, /* Set via management interface */
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147 JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR = 4, /* Set via environment variables */
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148 JMM_VMGLOBAL_ORIGIN_CONFIG_FILE = 5, /* Set via config file (such as .hotspotrc) */
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149 JMM_VMGLOBAL_ORIGIN_ERGONOMIC = 6, /* Set via ergonomic */
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150 JMM_VMGLOBAL_ORIGIN_OTHER = 99 /* Set via some other mechanism */
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151 } jmmVMGlobalOrigin;
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152
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153 typedef struct {
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154 jstring name;
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155 jvalue value;
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156 jmmVMGlobalType type; /* Data type */
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157 jmmVMGlobalOrigin origin; /* Default or non-default value */
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158 unsigned int writeable : 1; /* dynamically writeable */
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159 unsigned int external : 1; /* external supported interface */
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160 unsigned int reserved : 30;
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161 void *reserved1;
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162 void *reserved2;
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163 } jmmVMGlobal;
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164
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165 typedef struct {
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166 const char* name;
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167 char type;
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168 const char* description;
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169 } jmmExtAttributeInfo;
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170
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171 /* Caller has to set the following fields before calling GetLastGCStat
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172 * o usage_before_gc - array of MemoryUsage objects
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173 * o usage_after_gc - array of MemoryUsage objects
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174 * o gc_ext_attribute_values_size - size of gc_ext_atttribute_values array
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175 * o gc_ext_attribtue_values - array of jvalues
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176 */
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177 typedef struct {
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178 jlong gc_index; /* Index of the collections */
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179 jlong start_time; /* Start time of the GC */
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180 jlong end_time; /* End time of the GC */
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181 jobjectArray usage_before_gc; /* Memory usage array before GC */
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182 jobjectArray usage_after_gc; /* Memory usage array after GC */
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183 jint gc_ext_attribute_values_size; /* set by the caller of GetGCStat */
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184 jvalue* gc_ext_attribute_values; /* Array of jvalue for GC extension attributes */
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185 jint num_gc_ext_attributes; /* number of GC extension attribute values s are filled */
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186 /* -1 indicates gc_ext_attribute_values is not big enough */
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187 } jmmGCStat;
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188
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189 typedef struct jmmInterface_1_ {
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190 void* reserved1;
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191 void* reserved2;
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192
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193 jint (JNICALL *GetVersion) (JNIEnv *env);
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194
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195 jint (JNICALL *GetOptionalSupport) (JNIEnv *env,
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196 jmmOptionalSupport* support_ptr);
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197
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198 /* This is used by JDK 6 and earlier.
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199 * For JDK 7 and after, use GetInputArgumentArray.
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200 */
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201 jobject (JNICALL *GetInputArguments) (JNIEnv *env);
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202
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203 jint (JNICALL *GetThreadInfo) (JNIEnv *env,
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204 jlongArray ids,
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205 jint maxDepth,
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206 jobjectArray infoArray);
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207 jobjectArray (JNICALL *GetInputArgumentArray) (JNIEnv *env);
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208
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209 jobjectArray (JNICALL *GetMemoryPools) (JNIEnv* env, jobject mgr);
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210
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211 jobjectArray (JNICALL *GetMemoryManagers) (JNIEnv* env, jobject pool);
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212
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213 jobject (JNICALL *GetMemoryPoolUsage) (JNIEnv* env, jobject pool);
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214 jobject (JNICALL *GetPeakMemoryPoolUsage) (JNIEnv* env, jobject pool);
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215
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216 void* reserved4;
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217
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218 jobject (JNICALL *GetMemoryUsage) (JNIEnv* env, jboolean heap);
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219
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220 jlong (JNICALL *GetLongAttribute) (JNIEnv *env, jobject obj, jmmLongAttribute att);
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221 jboolean (JNICALL *GetBoolAttribute) (JNIEnv *env, jmmBoolAttribute att);
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222 jboolean (JNICALL *SetBoolAttribute) (JNIEnv *env, jmmBoolAttribute att, jboolean flag);
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223
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224 jint (JNICALL *GetLongAttributes) (JNIEnv *env,
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225 jobject obj,
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226 jmmLongAttribute* atts,
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227 jint count,
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228 jlong* result);
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229
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230 jobjectArray (JNICALL *FindCircularBlockedThreads) (JNIEnv *env);
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231 jlong (JNICALL *GetThreadCpuTime) (JNIEnv *env, jlong thread_id);
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232
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233 jobjectArray (JNICALL *GetVMGlobalNames) (JNIEnv *env);
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234 jint (JNICALL *GetVMGlobals) (JNIEnv *env,
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235 jobjectArray names,
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236 jmmVMGlobal *globals,
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237 jint count);
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238
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239 jint (JNICALL *GetInternalThreadTimes) (JNIEnv *env,
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240 jobjectArray names,
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241 jlongArray times);
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242
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243 jboolean (JNICALL *ResetStatistic) (JNIEnv *env,
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244 jvalue obj,
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245 jmmStatisticType type);
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246
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247 void (JNICALL *SetPoolSensor) (JNIEnv *env,
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248 jobject pool,
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249 jmmThresholdType type,
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250 jobject sensor);
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251
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252 jlong (JNICALL *SetPoolThreshold) (JNIEnv *env,
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253 jobject pool,
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254 jmmThresholdType type,
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255 jlong threshold);
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256 jobject (JNICALL *GetPoolCollectionUsage) (JNIEnv* env, jobject pool);
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257
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258 jint (JNICALL *GetGCExtAttributeInfo) (JNIEnv *env,
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259 jobject mgr,
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260 jmmExtAttributeInfo *ext_info,
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261 jint count);
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262 void (JNICALL *GetLastGCStat) (JNIEnv *env,
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263 jobject mgr,
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264 jmmGCStat *gc_stat);
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265 jlong (JNICALL *GetThreadCpuTimeWithKind) (JNIEnv *env,
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266 jlong thread_id,
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267 jboolean user_sys_cpu_time);
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268 void* reserved5;
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269 jint (JNICALL *DumpHeap0) (JNIEnv *env,
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270 jstring outputfile,
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271 jboolean live);
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272 jobjectArray (JNICALL *FindDeadlocks) (JNIEnv *env, jboolean object_monitors_only);
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273 void (JNICALL *SetVMGlobal) (JNIEnv *env,
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274 jstring flag_name,
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275 jvalue new_value);
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276 void* reserved6;
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277 jobjectArray (JNICALL *DumpThreads) (JNIEnv *env,
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278 jlongArray ids,
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279 jboolean lockedMonitors,
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280 jboolean lockedSynchronizers);
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281 } JmmInterface;
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282
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283 #ifdef __cplusplus
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284 } /* extern "C" */
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285 #endif /* __cplusplus */
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286
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287 #endif /* !_JAVA_JMM_H_ */
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