1 /* |
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2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #ifndef SHARE_VM_RUNTIME_INTERFACESUPPORT_HPP |
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26 #define SHARE_VM_RUNTIME_INTERFACESUPPORT_HPP |
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27 |
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28 #include "gc/shared/gcLocker.hpp" |
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29 #include "runtime/handles.inline.hpp" |
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30 #include "runtime/mutexLocker.hpp" |
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31 #include "runtime/orderAccess.hpp" |
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32 #include "runtime/os.hpp" |
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33 #include "runtime/safepointMechanism.inline.hpp" |
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34 #include "runtime/thread.inline.hpp" |
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35 #include "runtime/vmThread.hpp" |
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36 #include "utilities/globalDefinitions.hpp" |
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37 #include "utilities/macros.hpp" |
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38 #include "utilities/preserveException.hpp" |
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39 |
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40 // Wrapper for all entry points to the virtual machine. |
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41 // The HandleMarkCleaner is a faster version of HandleMark. |
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42 // It relies on the fact that there is a HandleMark further |
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43 // down the stack (in JavaCalls::call_helper), and just resets |
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44 // to the saved values in that HandleMark. |
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45 |
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46 class HandleMarkCleaner: public StackObj { |
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47 private: |
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48 Thread* _thread; |
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49 public: |
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50 HandleMarkCleaner(Thread* thread) { |
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51 _thread = thread; |
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52 _thread->last_handle_mark()->push(); |
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53 } |
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54 ~HandleMarkCleaner() { |
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55 _thread->last_handle_mark()->pop_and_restore(); |
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56 } |
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57 |
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58 private: |
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59 inline void* operator new(size_t size, void* ptr) throw() { |
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60 return ptr; |
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61 } |
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62 }; |
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63 |
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64 // InterfaceSupport provides functionality used by the VM_LEAF_BASE and |
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65 // VM_ENTRY_BASE macros. These macros are used to guard entry points into |
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66 // the VM and perform checks upon leave of the VM. |
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67 |
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68 |
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69 class InterfaceSupport: AllStatic { |
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70 # ifdef ASSERT |
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71 public: |
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72 static long _scavenge_alot_counter; |
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73 static long _fullgc_alot_counter; |
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74 static long _number_of_calls; |
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75 static long _fullgc_alot_invocation; |
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76 |
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77 // Helper methods used to implement +ScavengeALot and +FullGCALot |
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78 static void check_gc_alot() { if (ScavengeALot || FullGCALot) gc_alot(); } |
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79 static void gc_alot(); |
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80 |
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81 static void walk_stack_from(vframe* start_vf); |
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82 static void walk_stack(); |
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83 |
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84 static void zombieAll(); |
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85 static void unlinkSymbols(); |
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86 static void deoptimizeAll(); |
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87 static void stress_derived_pointers(); |
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88 static void verify_stack(); |
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89 static void verify_last_frame(); |
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90 # endif |
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91 |
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92 public: |
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93 static void serialize_thread_state_with_handler(JavaThread* thread) { |
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94 serialize_thread_state_internal(thread, true); |
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95 } |
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96 |
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97 // Should only call this if we know that we have a proper SEH set up. |
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98 static void serialize_thread_state(JavaThread* thread) { |
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99 serialize_thread_state_internal(thread, false); |
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100 } |
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101 |
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102 private: |
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103 static void serialize_thread_state_internal(JavaThread* thread, bool needs_exception_handler) { |
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104 // Make sure new state is seen by VM thread |
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105 if (os::is_MP()) { |
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106 if (UseMembar) { |
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107 // Force a fence between the write above and read below |
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108 OrderAccess::fence(); |
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109 } else { |
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110 // store to serialize page so VM thread can do pseudo remote membar |
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111 if (needs_exception_handler) { |
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112 os::write_memory_serialize_page_with_handler(thread); |
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113 } else { |
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114 os::write_memory_serialize_page(thread); |
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115 } |
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116 } |
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117 } |
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118 } |
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119 }; |
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120 |
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121 |
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122 // Basic class for all thread transition classes. |
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123 |
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124 class ThreadStateTransition : public StackObj { |
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125 protected: |
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126 JavaThread* _thread; |
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127 public: |
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128 ThreadStateTransition(JavaThread *thread) { |
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129 _thread = thread; |
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130 assert(thread != NULL && thread->is_Java_thread(), "must be Java thread"); |
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131 } |
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132 |
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133 // Change threadstate in a manner, so safepoint can detect changes. |
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134 // Time-critical: called on exit from every runtime routine |
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135 static inline void transition(JavaThread *thread, JavaThreadState from, JavaThreadState to) { |
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136 assert(from != _thread_in_Java, "use transition_from_java"); |
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137 assert(from != _thread_in_native, "use transition_from_native"); |
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138 assert((from & 1) == 0 && (to & 1) == 0, "odd numbers are transitions states"); |
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139 assert(thread->thread_state() == from, "coming from wrong thread state"); |
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140 // Change to transition state |
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141 thread->set_thread_state((JavaThreadState)(from + 1)); |
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142 |
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143 InterfaceSupport::serialize_thread_state(thread); |
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144 |
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145 SafepointMechanism::block_if_requested(thread); |
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146 thread->set_thread_state(to); |
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147 |
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148 CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops();) |
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149 } |
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150 |
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151 // transition_and_fence must be used on any thread state transition |
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152 // where there might not be a Java call stub on the stack, in |
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153 // particular on Windows where the Structured Exception Handler is |
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154 // set up in the call stub. os::write_memory_serialize_page() can |
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155 // fault and we can't recover from it on Windows without a SEH in |
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156 // place. |
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157 static inline void transition_and_fence(JavaThread *thread, JavaThreadState from, JavaThreadState to) { |
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158 assert(thread->thread_state() == from, "coming from wrong thread state"); |
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159 assert((from & 1) == 0 && (to & 1) == 0, "odd numbers are transitions states"); |
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160 // Change to transition state |
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161 thread->set_thread_state((JavaThreadState)(from + 1)); |
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162 |
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163 InterfaceSupport::serialize_thread_state_with_handler(thread); |
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164 |
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165 SafepointMechanism::block_if_requested(thread); |
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166 thread->set_thread_state(to); |
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167 |
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168 CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops();) |
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169 } |
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170 |
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171 // Same as above, but assumes from = _thread_in_Java. This is simpler, since we |
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172 // never block on entry to the VM. This will break the code, since e.g. preserve arguments |
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173 // have not been setup. |
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174 static inline void transition_from_java(JavaThread *thread, JavaThreadState to) { |
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175 assert(thread->thread_state() == _thread_in_Java, "coming from wrong thread state"); |
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176 thread->set_thread_state(to); |
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177 } |
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178 |
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179 static inline void transition_from_native(JavaThread *thread, JavaThreadState to) { |
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180 assert((to & 1) == 0, "odd numbers are transitions states"); |
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181 assert(thread->thread_state() == _thread_in_native, "coming from wrong thread state"); |
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182 // Change to transition state |
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183 thread->set_thread_state(_thread_in_native_trans); |
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184 |
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185 InterfaceSupport::serialize_thread_state_with_handler(thread); |
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186 |
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187 // We never install asynchronous exceptions when coming (back) in |
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188 // to the runtime from native code because the runtime is not set |
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189 // up to handle exceptions floating around at arbitrary points. |
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190 if (SafepointMechanism::poll(thread) || thread->is_suspend_after_native()) { |
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191 JavaThread::check_safepoint_and_suspend_for_native_trans(thread); |
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192 |
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193 // Clear unhandled oops anywhere where we could block, even if we don't. |
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194 CHECK_UNHANDLED_OOPS_ONLY(thread->clear_unhandled_oops();) |
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195 } |
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196 |
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197 thread->set_thread_state(to); |
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198 } |
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199 protected: |
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200 void trans(JavaThreadState from, JavaThreadState to) { transition(_thread, from, to); } |
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201 void trans_from_java(JavaThreadState to) { transition_from_java(_thread, to); } |
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202 void trans_from_native(JavaThreadState to) { transition_from_native(_thread, to); } |
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203 void trans_and_fence(JavaThreadState from, JavaThreadState to) { transition_and_fence(_thread, from, to); } |
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204 }; |
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205 |
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206 class ThreadInVMForHandshake : public ThreadStateTransition { |
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207 const JavaThreadState _original_state; |
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208 |
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209 void transition_back() { |
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210 // This can be invoked from transition states and must return to the original state properly |
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211 assert(_thread->thread_state() == _thread_in_vm, "should only call when leaving VM after handshake"); |
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212 _thread->set_thread_state(_thread_in_vm_trans); |
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213 |
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214 InterfaceSupport::serialize_thread_state(_thread); |
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215 |
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216 SafepointMechanism::block_if_requested(_thread); |
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217 |
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218 _thread->set_thread_state(_original_state); |
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219 } |
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220 |
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221 public: |
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222 |
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223 ThreadInVMForHandshake(JavaThread* thread) : ThreadStateTransition(thread), |
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224 _original_state(thread->thread_state()) { |
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225 |
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226 if (thread->has_last_Java_frame()) { |
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227 thread->frame_anchor()->make_walkable(thread); |
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228 } |
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229 |
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230 thread->set_thread_state(_thread_in_vm); |
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231 } |
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232 |
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233 ~ThreadInVMForHandshake() { |
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234 transition_back(); |
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235 } |
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236 |
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237 }; |
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238 |
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239 class ThreadInVMfromJava : public ThreadStateTransition { |
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240 public: |
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241 ThreadInVMfromJava(JavaThread* thread) : ThreadStateTransition(thread) { |
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242 trans_from_java(_thread_in_vm); |
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243 } |
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244 ~ThreadInVMfromJava() { |
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245 if (_thread->stack_yellow_reserved_zone_disabled()) { |
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246 _thread->enable_stack_yellow_reserved_zone(); |
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247 } |
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248 trans(_thread_in_vm, _thread_in_Java); |
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249 // Check for pending. async. exceptions or suspends. |
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250 if (_thread->has_special_runtime_exit_condition()) _thread->handle_special_runtime_exit_condition(); |
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251 } |
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252 }; |
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253 |
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254 |
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255 class ThreadInVMfromUnknown { |
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256 private: |
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257 JavaThread* _thread; |
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258 public: |
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259 ThreadInVMfromUnknown() : _thread(NULL) { |
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260 Thread* t = Thread::current(); |
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261 if (t->is_Java_thread()) { |
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262 JavaThread* t2 = (JavaThread*) t; |
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263 if (t2->thread_state() == _thread_in_native) { |
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264 _thread = t2; |
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265 ThreadStateTransition::transition_from_native(t2, _thread_in_vm); |
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266 // Used to have a HandleMarkCleaner but that is dangerous as |
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267 // it could free a handle in our (indirect, nested) caller. |
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268 // We expect any handles will be short lived and figure we |
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269 // don't need an actual HandleMark. |
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270 } |
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271 } |
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272 } |
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273 ~ThreadInVMfromUnknown() { |
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274 if (_thread) { |
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275 ThreadStateTransition::transition_and_fence(_thread, _thread_in_vm, _thread_in_native); |
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276 } |
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277 } |
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278 }; |
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279 |
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280 |
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281 class ThreadInVMfromNative : public ThreadStateTransition { |
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282 public: |
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283 ThreadInVMfromNative(JavaThread* thread) : ThreadStateTransition(thread) { |
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284 trans_from_native(_thread_in_vm); |
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285 } |
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286 ~ThreadInVMfromNative() { |
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287 trans_and_fence(_thread_in_vm, _thread_in_native); |
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288 } |
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289 }; |
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290 |
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291 |
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292 class ThreadToNativeFromVM : public ThreadStateTransition { |
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293 public: |
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294 ThreadToNativeFromVM(JavaThread *thread) : ThreadStateTransition(thread) { |
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295 // We are leaving the VM at this point and going directly to native code. |
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296 // Block, if we are in the middle of a safepoint synchronization. |
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297 assert(!thread->owns_locks(), "must release all locks when leaving VM"); |
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298 thread->frame_anchor()->make_walkable(thread); |
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299 trans_and_fence(_thread_in_vm, _thread_in_native); |
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300 // Check for pending. async. exceptions or suspends. |
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301 if (_thread->has_special_runtime_exit_condition()) _thread->handle_special_runtime_exit_condition(false); |
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302 } |
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303 |
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304 ~ThreadToNativeFromVM() { |
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305 trans_from_native(_thread_in_vm); |
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306 assert(!_thread->is_pending_jni_exception_check(), "Pending JNI Exception Check"); |
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307 // We don't need to clear_walkable because it will happen automagically when we return to java |
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308 } |
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309 }; |
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310 |
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311 |
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312 class ThreadBlockInVM : public ThreadStateTransition { |
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313 public: |
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314 ThreadBlockInVM(JavaThread *thread) |
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315 : ThreadStateTransition(thread) { |
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316 // Once we are blocked vm expects stack to be walkable |
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317 thread->frame_anchor()->make_walkable(thread); |
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318 trans_and_fence(_thread_in_vm, _thread_blocked); |
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319 } |
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320 ~ThreadBlockInVM() { |
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321 trans_and_fence(_thread_blocked, _thread_in_vm); |
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322 // We don't need to clear_walkable because it will happen automagically when we return to java |
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323 } |
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324 }; |
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325 |
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326 |
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327 // This special transition class is only used to prevent asynchronous exceptions |
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328 // from being installed on vm exit in situations where we can't tolerate them. |
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329 // See bugs: 4324348, 4854693, 4998314, 5040492, 5050705. |
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330 class ThreadInVMfromJavaNoAsyncException : public ThreadStateTransition { |
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331 public: |
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332 ThreadInVMfromJavaNoAsyncException(JavaThread* thread) : ThreadStateTransition(thread) { |
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333 trans_from_java(_thread_in_vm); |
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334 } |
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335 ~ThreadInVMfromJavaNoAsyncException() { |
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336 if (_thread->stack_yellow_reserved_zone_disabled()) { |
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337 _thread->enable_stack_yellow_reserved_zone(); |
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338 } |
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339 trans(_thread_in_vm, _thread_in_Java); |
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340 // NOTE: We do not check for pending. async. exceptions. |
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341 // If we did and moved the pending async exception over into the |
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342 // pending exception field, we would need to deopt (currently C2 |
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343 // only). However, to do so would require that we transition back |
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344 // to the _thread_in_vm state. Instead we postpone the handling of |
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345 // the async exception. |
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346 |
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347 |
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348 // Check for pending. suspends only. |
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349 if (_thread->has_special_runtime_exit_condition()) |
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350 _thread->handle_special_runtime_exit_condition(false); |
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351 } |
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352 }; |
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353 |
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354 // Debug class instantiated in JRT_ENTRY and ITR_ENTRY macro. |
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355 // Can be used to verify properties on enter/exit of the VM. |
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356 |
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357 #ifdef ASSERT |
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358 class VMEntryWrapper { |
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359 public: |
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360 VMEntryWrapper() { |
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361 if (VerifyLastFrame) { |
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362 InterfaceSupport::verify_last_frame(); |
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363 } |
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364 } |
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365 |
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366 ~VMEntryWrapper() { |
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367 InterfaceSupport::check_gc_alot(); |
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368 if (WalkStackALot) { |
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369 InterfaceSupport::walk_stack(); |
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370 } |
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371 #ifdef COMPILER2 |
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372 // This option is not used by Compiler 1 |
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373 if (StressDerivedPointers) { |
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374 InterfaceSupport::stress_derived_pointers(); |
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375 } |
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376 #endif |
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377 if (DeoptimizeALot || DeoptimizeRandom) { |
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378 InterfaceSupport::deoptimizeAll(); |
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379 } |
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380 if (ZombieALot) { |
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381 InterfaceSupport::zombieAll(); |
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382 } |
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383 if (UnlinkSymbolsALot) { |
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384 InterfaceSupport::unlinkSymbols(); |
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385 } |
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386 // do verification AFTER potential deoptimization |
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387 if (VerifyStack) { |
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388 InterfaceSupport::verify_stack(); |
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389 } |
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390 |
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391 } |
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392 }; |
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393 |
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394 |
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395 class VMNativeEntryWrapper { |
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396 public: |
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397 VMNativeEntryWrapper() { |
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398 if (GCALotAtAllSafepoints) InterfaceSupport::check_gc_alot(); |
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399 } |
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400 |
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401 ~VMNativeEntryWrapper() { |
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402 if (GCALotAtAllSafepoints) InterfaceSupport::check_gc_alot(); |
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403 } |
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404 }; |
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405 |
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406 #endif |
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407 |
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408 |
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409 // VM-internal runtime interface support |
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410 |
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411 #ifdef ASSERT |
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412 |
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413 class RuntimeHistogramElement : public HistogramElement { |
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414 public: |
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415 RuntimeHistogramElement(const char* name); |
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416 }; |
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417 |
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418 #define TRACE_CALL(result_type, header) \ |
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419 InterfaceSupport::_number_of_calls++; \ |
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420 if (CountRuntimeCalls) { \ |
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421 static RuntimeHistogramElement* e = new RuntimeHistogramElement(#header); \ |
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422 if (e != NULL) e->increment_count(); \ |
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423 } |
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424 #else |
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425 #define TRACE_CALL(result_type, header) \ |
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426 /* do nothing */ |
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427 #endif |
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428 |
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429 |
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430 // LEAF routines do not lock, GC or throw exceptions |
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431 |
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432 #define VM_LEAF_BASE(result_type, header) \ |
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433 TRACE_CALL(result_type, header) \ |
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434 debug_only(NoHandleMark __hm;) \ |
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435 os::verify_stack_alignment(); \ |
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436 /* begin of body */ |
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437 |
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438 #define VM_ENTRY_BASE_FROM_LEAF(result_type, header, thread) \ |
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439 TRACE_CALL(result_type, header) \ |
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440 debug_only(ResetNoHandleMark __rnhm;) \ |
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441 HandleMarkCleaner __hm(thread); \ |
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442 Thread* THREAD = thread; \ |
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443 os::verify_stack_alignment(); \ |
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444 /* begin of body */ |
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445 |
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446 |
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447 // ENTRY routines may lock, GC and throw exceptions |
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448 |
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449 #define VM_ENTRY_BASE(result_type, header, thread) \ |
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450 TRACE_CALL(result_type, header) \ |
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451 HandleMarkCleaner __hm(thread); \ |
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452 Thread* THREAD = thread; \ |
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453 os::verify_stack_alignment(); \ |
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454 /* begin of body */ |
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455 |
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456 |
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457 // QUICK_ENTRY routines behave like ENTRY but without a handle mark |
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458 |
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459 #define VM_QUICK_ENTRY_BASE(result_type, header, thread) \ |
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460 TRACE_CALL(result_type, header) \ |
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461 debug_only(NoHandleMark __hm;) \ |
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462 Thread* THREAD = thread; \ |
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463 os::verify_stack_alignment(); \ |
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464 /* begin of body */ |
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465 |
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466 |
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467 // Definitions for IRT (Interpreter Runtime) |
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468 // (thread is an argument passed in to all these routines) |
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469 |
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470 #define IRT_ENTRY(result_type, header) \ |
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471 result_type header { \ |
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472 ThreadInVMfromJava __tiv(thread); \ |
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473 VM_ENTRY_BASE(result_type, header, thread) \ |
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474 debug_only(VMEntryWrapper __vew;) |
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475 |
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476 |
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477 #define IRT_LEAF(result_type, header) \ |
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478 result_type header { \ |
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479 VM_LEAF_BASE(result_type, header) \ |
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480 debug_only(NoSafepointVerifier __nspv(true);) |
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481 |
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482 |
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483 #define IRT_ENTRY_NO_ASYNC(result_type, header) \ |
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484 result_type header { \ |
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485 ThreadInVMfromJavaNoAsyncException __tiv(thread); \ |
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486 VM_ENTRY_BASE(result_type, header, thread) \ |
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487 debug_only(VMEntryWrapper __vew;) |
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488 |
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489 #define IRT_END } |
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490 |
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491 |
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492 // Definitions for JRT (Java (Compiler/Shared) Runtime) |
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493 |
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494 #define JRT_ENTRY(result_type, header) \ |
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495 result_type header { \ |
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496 ThreadInVMfromJava __tiv(thread); \ |
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497 VM_ENTRY_BASE(result_type, header, thread) \ |
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498 debug_only(VMEntryWrapper __vew;) |
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499 |
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500 |
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501 #define JRT_LEAF(result_type, header) \ |
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502 result_type header { \ |
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503 VM_LEAF_BASE(result_type, header) \ |
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504 debug_only(JRTLeafVerifier __jlv;) |
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505 |
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506 |
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507 #define JRT_ENTRY_NO_ASYNC(result_type, header) \ |
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508 result_type header { \ |
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509 ThreadInVMfromJavaNoAsyncException __tiv(thread); \ |
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510 VM_ENTRY_BASE(result_type, header, thread) \ |
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511 debug_only(VMEntryWrapper __vew;) |
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512 |
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513 // Same as JRT Entry but allows for return value after the safepoint |
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514 // to get back into Java from the VM |
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515 #define JRT_BLOCK_ENTRY(result_type, header) \ |
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516 result_type header { \ |
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517 TRACE_CALL(result_type, header) \ |
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518 HandleMarkCleaner __hm(thread); |
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519 |
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520 #define JRT_BLOCK \ |
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521 { \ |
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522 ThreadInVMfromJava __tiv(thread); \ |
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523 Thread* THREAD = thread; \ |
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524 debug_only(VMEntryWrapper __vew;) |
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525 |
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526 #define JRT_BLOCK_NO_ASYNC \ |
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527 { \ |
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528 ThreadInVMfromJavaNoAsyncException __tiv(thread); \ |
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529 Thread* THREAD = thread; \ |
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530 debug_only(VMEntryWrapper __vew;) |
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531 |
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532 #define JRT_BLOCK_END } |
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533 |
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534 #define JRT_END } |
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535 |
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536 // Definitions for JNI |
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537 |
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538 #define JNI_ENTRY(result_type, header) \ |
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539 JNI_ENTRY_NO_PRESERVE(result_type, header) \ |
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540 WeakPreserveExceptionMark __wem(thread); |
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541 |
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542 #define JNI_ENTRY_NO_PRESERVE(result_type, header) \ |
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543 extern "C" { \ |
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544 result_type JNICALL header { \ |
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545 JavaThread* thread=JavaThread::thread_from_jni_environment(env); \ |
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546 assert( !VerifyJNIEnvThread || (thread == Thread::current()), "JNIEnv is only valid in same thread"); \ |
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547 ThreadInVMfromNative __tiv(thread); \ |
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548 debug_only(VMNativeEntryWrapper __vew;) \ |
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549 VM_ENTRY_BASE(result_type, header, thread) |
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550 |
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551 |
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552 // Ensure that the VMNativeEntryWrapper constructor, which can cause |
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553 // a GC, is called outside the NoHandleMark (set via VM_QUICK_ENTRY_BASE). |
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554 #define JNI_QUICK_ENTRY(result_type, header) \ |
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555 extern "C" { \ |
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556 result_type JNICALL header { \ |
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557 JavaThread* thread=JavaThread::thread_from_jni_environment(env); \ |
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558 assert( !VerifyJNIEnvThread || (thread == Thread::current()), "JNIEnv is only valid in same thread"); \ |
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559 ThreadInVMfromNative __tiv(thread); \ |
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560 debug_only(VMNativeEntryWrapper __vew;) \ |
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561 VM_QUICK_ENTRY_BASE(result_type, header, thread) |
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562 |
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563 |
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564 #define JNI_LEAF(result_type, header) \ |
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565 extern "C" { \ |
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566 result_type JNICALL header { \ |
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567 JavaThread* thread=JavaThread::thread_from_jni_environment(env); \ |
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568 assert( !VerifyJNIEnvThread || (thread == Thread::current()), "JNIEnv is only valid in same thread"); \ |
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569 VM_LEAF_BASE(result_type, header) |
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570 |
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571 |
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572 // Close the routine and the extern "C" |
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573 #define JNI_END } } |
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574 |
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575 |
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576 |
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577 // Definitions for JVM |
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578 |
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579 #define JVM_ENTRY(result_type, header) \ |
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580 extern "C" { \ |
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581 result_type JNICALL header { \ |
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582 JavaThread* thread=JavaThread::thread_from_jni_environment(env); \ |
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583 ThreadInVMfromNative __tiv(thread); \ |
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584 debug_only(VMNativeEntryWrapper __vew;) \ |
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585 VM_ENTRY_BASE(result_type, header, thread) |
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586 |
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587 |
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588 #define JVM_ENTRY_NO_ENV(result_type, header) \ |
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589 extern "C" { \ |
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590 result_type JNICALL header { \ |
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591 JavaThread* thread = JavaThread::current(); \ |
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592 ThreadInVMfromNative __tiv(thread); \ |
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593 debug_only(VMNativeEntryWrapper __vew;) \ |
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594 VM_ENTRY_BASE(result_type, header, thread) |
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595 |
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596 |
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597 #define JVM_QUICK_ENTRY(result_type, header) \ |
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598 extern "C" { \ |
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599 result_type JNICALL header { \ |
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600 JavaThread* thread=JavaThread::thread_from_jni_environment(env); \ |
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601 ThreadInVMfromNative __tiv(thread); \ |
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602 debug_only(VMNativeEntryWrapper __vew;) \ |
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603 VM_QUICK_ENTRY_BASE(result_type, header, thread) |
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604 |
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605 |
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606 #define JVM_LEAF(result_type, header) \ |
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607 extern "C" { \ |
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608 result_type JNICALL header { \ |
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609 VM_Exit::block_if_vm_exited(); \ |
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610 VM_LEAF_BASE(result_type, header) |
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611 |
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612 |
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613 #define JVM_ENTRY_FROM_LEAF(env, result_type, header) \ |
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614 { { \ |
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615 JavaThread* thread=JavaThread::thread_from_jni_environment(env); \ |
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616 ThreadInVMfromNative __tiv(thread); \ |
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617 debug_only(VMNativeEntryWrapper __vew;) \ |
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618 VM_ENTRY_BASE_FROM_LEAF(result_type, header, thread) |
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619 |
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620 |
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621 #define JVM_END } } |
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622 |
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623 #endif // SHARE_VM_RUNTIME_INTERFACESUPPORT_HPP |
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