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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. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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20 * CA 95054 USA or visit www.sun.com if you need additional information or |
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21 * have any questions. |
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22 * |
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23 */ |
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24 #ifndef _JAVA_JVMTIENVTHREADSTATE_H_ |
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25 #define _JAVA_JVMTIENVTHREADSTATE_H_ |
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26 |
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27 /////////////////////////////////////////////////////////////// |
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28 // |
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29 // class JvmtiFramePop |
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30 // Used by : JvmtiFramePops |
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31 // Used by JVMTI methods: none directly. |
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32 // |
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33 // Wrapper class for FramePop, used in the JvmtiFramePops class. |
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34 // |
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35 // Two problems: 1) this isn't being used as a ValueObj class, in |
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36 // several places there are constructors for it. 2) It seems like |
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37 // overkill as a means to get an assert and name the geater than |
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38 // operator. I'm trying to to rewrite everything. |
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39 |
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40 class JvmtiFramePop VALUE_OBJ_CLASS_SPEC { |
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41 private: |
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42 // Frame number counting from BOTTOM (oldest) frame; |
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43 // bottom frame == #0 |
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44 int _frame_number; |
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45 public: |
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46 JvmtiFramePop() {} |
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47 JvmtiFramePop(int frame_number) { |
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48 assert(frame_number >= 0, "invalid frame number"); |
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49 _frame_number = frame_number; |
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50 } |
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51 |
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52 int frame_number() { return _frame_number; } |
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53 int above_on_stack(JvmtiFramePop& other) { return _frame_number > other._frame_number; } |
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54 void print() PRODUCT_RETURN; |
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55 }; |
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56 |
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57 |
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58 /////////////////////////////////////////////////////////////// |
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59 // |
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60 // class JvmtiFramePops |
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61 // Used by : JvmtiThreadState |
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62 // Used by JVMTI methods: none directly. |
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63 // |
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64 // A collection of JvmtiFramePop. |
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65 // It records what frames on a threads stack should post frame_pop events when they're exited. |
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66 // |
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67 |
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68 class JvmtiFramePops : public CHeapObj { |
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69 private: |
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70 GrowableArray<int>* _pops; |
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71 |
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72 // should only be used by JvmtiEventControllerPrivate |
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73 // to insure they only occur at safepoints. |
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74 // Todo: add checks for safepoint |
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75 friend class JvmtiEventControllerPrivate; |
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76 void set(JvmtiFramePop& fp); |
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77 void clear(JvmtiFramePop& fp); |
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78 int clear_to(JvmtiFramePop& fp); |
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79 |
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80 public: |
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81 JvmtiFramePops(); |
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82 ~JvmtiFramePops(); |
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83 |
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84 bool contains(JvmtiFramePop& fp) { return _pops->contains(fp.frame_number()); } |
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85 int length() { return _pops->length(); } |
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86 void print() PRODUCT_RETURN; |
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87 }; |
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88 |
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89 |
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90 /////////////////////////////////////////////////////////////// |
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91 // |
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92 // class JvmtiEnvThreadState |
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93 // |
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94 // 2. Cache of pending frame_pop_events, created by NotifyFramePop |
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95 // and lazily initialized. |
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96 // 3: Location of last executed instruction, used to filter out duplicate |
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97 // events due to instruction rewriting. |
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98 |
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99 class JvmtiEnvThreadState : public CHeapObj { |
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100 private: |
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101 friend class JvmtiEnv; |
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102 JavaThread *_thread; |
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103 JvmtiEnv *_env; |
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104 JvmtiEnvThreadState *_next; |
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105 jmethodID _current_method_id; |
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106 int _current_bci; |
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107 bool _breakpoint_posted; |
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108 bool _single_stepping_posted; |
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109 JvmtiEnvThreadEventEnable _event_enable; |
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110 void *_agent_thread_local_storage_data; // per env and per thread agent allocated data. |
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111 |
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112 // Class used to store pending framepops. |
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113 // lazily initialized by get_frame_pops(); |
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114 JvmtiFramePops *_frame_pops; |
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115 |
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116 inline void set_current_location(jmethodID method_id, int bci) { |
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117 _current_method_id = method_id; |
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118 _current_bci = bci; |
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119 } |
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120 |
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121 friend class JvmtiEnvThreadStateIterator; |
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122 JvmtiEnvThreadState* next() { return _next; } |
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123 |
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124 friend class JvmtiThreadState; |
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125 void set_next(JvmtiEnvThreadState* link) { _next = link; } |
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126 |
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127 public: |
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128 JvmtiEnvThreadState(JavaThread *thread, JvmtiEnvBase *env); |
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129 ~JvmtiEnvThreadState(); |
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130 |
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131 bool is_enabled(jvmtiEvent event_type) { return _event_enable.is_enabled(event_type); } |
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132 |
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133 JvmtiEnvThreadEventEnable *event_enable() { return &_event_enable; } |
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134 void *get_agent_thread_local_storage_data() { return _agent_thread_local_storage_data; } |
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135 void set_agent_thread_local_storage_data (void *data) { _agent_thread_local_storage_data = data; } |
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136 |
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137 |
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138 // If the thread is in the given method at the given |
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139 // location just return. Otherwise, reset the current location |
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140 // and reset _breakpoint_posted and _single_stepping_posted. |
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141 // _breakpoint_posted and _single_stepping_posted are only cleared |
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142 // here. |
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143 void compare_and_set_current_location(methodOop method, address location, jvmtiEvent event); |
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144 |
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145 void clear_current_location() { set_current_location((jmethodID)NULL, 0); } |
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146 |
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147 void reset_current_location(jvmtiEvent event, bool enabled); |
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148 |
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149 inline void set_breakpoint_posted() { _breakpoint_posted = true; } |
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150 inline void set_single_stepping_posted() { |
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151 _single_stepping_posted = true; |
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152 } |
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153 inline bool breakpoint_posted() { return _breakpoint_posted; } |
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154 inline bool single_stepping_posted() { |
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155 return _single_stepping_posted; |
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156 } |
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157 |
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158 inline JavaThread *get_thread() { return _thread; } |
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159 inline JvmtiEnv *get_env() { return _env; } |
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160 |
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161 // lazily initialize _frame_pops |
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162 JvmtiFramePops* get_frame_pops(); |
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163 |
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164 bool has_frame_pops(); |
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165 |
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166 // quickly test whether we should deliver a frame pop event on return from sp |
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167 bool is_frame_pop(int cur_stack_depth); |
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168 |
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169 void set_frame_pop(int frame_number); |
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170 void clear_frame_pop(int frame_number); |
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171 void clear_to_frame_pop(int frame_number); |
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172 |
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173 }; |
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174 |
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175 #endif /* _JAVA_JVMTIENVTHREADSTATE_H_ */ |