Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiExport.hpp @ 6922:cae17c597196
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author | coleenp |
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date | Thu, 01 Nov 2012 11:57:53 -0400 |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_PRIMS_JVMTIEXPORT_HPP |
26 #define SHARE_VM_PRIMS_JVMTIEXPORT_HPP | |
27 | |
28 #include "jvmtifiles/jvmti.h" | |
29 #include "memory/allocation.hpp" | |
30 #include "memory/iterator.hpp" | |
31 #include "oops/oop.hpp" | |
32 #include "oops/oopsHierarchy.hpp" | |
33 #include "runtime/frame.hpp" | |
34 #include "runtime/handles.hpp" | |
35 #include "utilities/globalDefinitions.hpp" | |
36 #include "utilities/growableArray.hpp" | |
0 | 37 |
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38 // Must be included after jvmti.h. |
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39 #include "code/jvmticmlr.h" |
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40 |
0 | 41 // Forward declarations |
42 | |
43 class JvmtiEventControllerPrivate; | |
44 class JvmtiManageCapabilities; | |
45 class JvmtiEnv; | |
46 class JvmtiThreadState; | |
47 class AttachOperation; | |
48 | |
49 #define JVMTI_SUPPORT_FLAG(key) \ | |
50 private: \ | |
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51 static bool _##key; \ |
0 | 52 public: \ |
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53 inline static void set_##key(bool on) { \ |
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54 JVMTI_ONLY(_##key = (on != 0)); \ |
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55 NOT_JVMTI(report_unsupported(on)); \ |
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56 } \ |
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57 inline static bool key() { \ |
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58 JVMTI_ONLY(return _##key); \ |
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59 NOT_JVMTI(return false); \ |
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60 } |
0 | 61 |
62 | |
63 // This class contains the JVMTI interface for the rest of hotspot. | |
64 // | |
65 class JvmtiExport : public AllStatic { | |
3939 | 66 friend class VMStructs; |
0 | 67 private: |
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68 |
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69 #if INCLUDE_JVMTI |
0 | 70 static int _field_access_count; |
71 static int _field_modification_count; | |
72 | |
73 static bool _can_access_local_variables; | |
74 static bool _can_hotswap_or_post_breakpoint; | |
75 static bool _can_modify_any_class; | |
76 static bool _can_walk_any_space; | |
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77 #endif // INCLUDE_JVMTI |
0 | 78 |
79 JVMTI_SUPPORT_FLAG(can_get_source_debug_extension) | |
80 JVMTI_SUPPORT_FLAG(can_maintain_original_method_order) | |
81 JVMTI_SUPPORT_FLAG(can_post_interpreter_events) | |
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82 JVMTI_SUPPORT_FLAG(can_post_on_exceptions) |
0 | 83 JVMTI_SUPPORT_FLAG(can_post_breakpoint) |
84 JVMTI_SUPPORT_FLAG(can_post_field_access) | |
85 JVMTI_SUPPORT_FLAG(can_post_field_modification) | |
86 JVMTI_SUPPORT_FLAG(can_post_method_entry) | |
87 JVMTI_SUPPORT_FLAG(can_post_method_exit) | |
88 JVMTI_SUPPORT_FLAG(can_pop_frame) | |
89 JVMTI_SUPPORT_FLAG(can_force_early_return) | |
90 | |
91 friend class JvmtiEventControllerPrivate; // should only modify these flags | |
92 JVMTI_SUPPORT_FLAG(should_post_single_step) | |
93 JVMTI_SUPPORT_FLAG(should_post_field_access) | |
94 JVMTI_SUPPORT_FLAG(should_post_field_modification) | |
95 JVMTI_SUPPORT_FLAG(should_post_class_load) | |
96 JVMTI_SUPPORT_FLAG(should_post_class_prepare) | |
97 JVMTI_SUPPORT_FLAG(should_post_class_unload) | |
98 JVMTI_SUPPORT_FLAG(should_post_native_method_bind) | |
99 JVMTI_SUPPORT_FLAG(should_post_compiled_method_load) | |
100 JVMTI_SUPPORT_FLAG(should_post_compiled_method_unload) | |
101 JVMTI_SUPPORT_FLAG(should_post_dynamic_code_generated) | |
102 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_enter) | |
103 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_entered) | |
104 JVMTI_SUPPORT_FLAG(should_post_monitor_wait) | |
105 JVMTI_SUPPORT_FLAG(should_post_monitor_waited) | |
106 JVMTI_SUPPORT_FLAG(should_post_data_dump) | |
107 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_start) | |
108 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_finish) | |
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109 JVMTI_SUPPORT_FLAG(should_post_on_exceptions) |
0 | 110 |
111 // ------ the below maybe don't have to be (but are for now) | |
112 // fixed conditions here ------------ | |
113 // any events can be enabled | |
114 JVMTI_SUPPORT_FLAG(should_post_thread_life) | |
115 JVMTI_SUPPORT_FLAG(should_post_object_free) | |
116 JVMTI_SUPPORT_FLAG(should_post_resource_exhausted) | |
117 | |
118 // we are holding objects on the heap - need to talk to GC - e.g. | |
119 // breakpoint info | |
120 JVMTI_SUPPORT_FLAG(should_clean_up_heap_objects) | |
121 JVMTI_SUPPORT_FLAG(should_post_vm_object_alloc) | |
122 | |
123 // If flag cannot be implemented, give an error if on=true | |
124 static void report_unsupported(bool on); | |
125 | |
126 // these should only be called by the friend class | |
127 friend class JvmtiManageCapabilities; | |
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128 inline static void set_can_modify_any_class(bool on) { |
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129 JVMTI_ONLY(_can_modify_any_class = (on != 0);) |
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130 } |
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131 inline static void set_can_access_local_variables(bool on) { |
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132 JVMTI_ONLY(_can_access_local_variables = (on != 0);) |
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133 } |
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134 inline static void set_can_hotswap_or_post_breakpoint(bool on) { |
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135 JVMTI_ONLY(_can_hotswap_or_post_breakpoint = (on != 0);) |
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136 } |
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137 inline static void set_can_walk_any_space(bool on) { |
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138 JVMTI_ONLY(_can_walk_any_space = (on != 0);) |
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139 } |
0 | 140 |
141 enum { | |
142 JVMTI_VERSION_MASK = 0x70000000, | |
143 JVMTI_VERSION_VALUE = 0x30000000, | |
144 JVMDI_VERSION_VALUE = 0x20000000 | |
145 }; | |
146 | |
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147 static void post_field_modification(JavaThread *thread, Method* method, address location, |
0 | 148 KlassHandle field_klass, Handle object, jfieldID field, |
149 char sig_type, jvalue *value); | |
150 | |
151 | |
152 // posts a DynamicCodeGenerated event (internal/private implementation). | |
153 // The public post_dynamic_code_generated* functions make use of the | |
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154 // internal implementation. Also called from JvmtiDeferredEvent::post() |
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155 static void post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) NOT_JVMTI_RETURN; |
0 | 156 |
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157 private: |
0 | 158 |
159 // GenerateEvents support to allow posting of CompiledMethodLoad and | |
160 // DynamicCodeGenerated events for a given environment. | |
161 friend class JvmtiCodeBlobEvents; | |
162 | |
163 static void post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, | |
164 const void *code_begin, const jint map_length, | |
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165 const jvmtiAddrLocationMap* map) NOT_JVMTI_RETURN; |
0 | 166 static void post_dynamic_code_generated(JvmtiEnv* env, const char *name, const void *code_begin, |
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167 const void *code_end) NOT_JVMTI_RETURN; |
0 | 168 |
169 // The RedefineClasses() API breaks some invariants in the "regular" | |
170 // system. For example, there are sanity checks when GC'ing nmethods | |
171 // that require the containing class to be unloading. However, when a | |
172 // method is redefined, the old method and nmethod can become GC'able | |
173 // without the containing class unloading. The state of becoming | |
174 // GC'able can be asynchronous to the RedefineClasses() call since | |
175 // the old method may still be running and cannot be GC'ed until | |
176 // after all old invocations have finished. Additionally, a method | |
177 // that has not been redefined may have an nmethod that depends on | |
178 // the redefined method. The dependent nmethod will get deopted in | |
179 // this case and may also be GC'able without the containing class | |
180 // being unloaded. | |
181 // | |
182 // This flag indicates whether RedefineClasses() has ever redefined | |
183 // one or more classes during the lifetime of the VM. The flag should | |
184 // only be set by the friend class and can be queried by other sub | |
185 // systems as needed to relax invariant checks. | |
186 static bool _has_redefined_a_class; | |
187 friend class VM_RedefineClasses; | |
188 inline static void set_has_redefined_a_class() { | |
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189 JVMTI_ONLY(_has_redefined_a_class = true;) |
0 | 190 } |
191 // Flag to indicate if the compiler has recorded all dependencies. When the | |
192 // can_redefine_classes capability is enabled in the OnLoad phase then the compiler | |
193 // records all dependencies from startup. However if the capability is first | |
194 // enabled some time later then the dependencies recorded by the compiler | |
195 // are incomplete. This flag is used by RedefineClasses to know if the | |
196 // dependency information is complete or not. | |
197 static bool _all_dependencies_are_recorded; | |
198 | |
199 public: | |
200 inline static bool has_redefined_a_class() { | |
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201 JVMTI_ONLY(return _has_redefined_a_class); |
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202 NOT_JVMTI(return false); |
0 | 203 } |
204 | |
205 inline static bool all_dependencies_are_recorded() { | |
206 return _all_dependencies_are_recorded; | |
207 } | |
208 | |
209 inline static void set_all_dependencies_are_recorded(bool on) { | |
210 _all_dependencies_are_recorded = (on != 0); | |
211 } | |
212 | |
213 | |
214 // let JVMTI know that the JVM_OnLoad code is running | |
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215 static void enter_onload_phase() NOT_JVMTI_RETURN; |
0 | 216 |
217 // let JVMTI know that the VM isn't up yet (and JVM_OnLoad code isn't running) | |
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218 static void enter_primordial_phase() NOT_JVMTI_RETURN; |
0 | 219 |
220 // let JVMTI know that the VM isn't up yet but JNI is live | |
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221 static void enter_start_phase() NOT_JVMTI_RETURN; |
0 | 222 |
223 // let JVMTI know that the VM is fully up and running now | |
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224 static void enter_live_phase() NOT_JVMTI_RETURN; |
0 | 225 |
226 // ------ can_* conditions (below) are set at OnLoad and never changed ------------ | |
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227 inline static bool can_modify_any_class() { |
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228 JVMTI_ONLY(return _can_modify_any_class); |
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229 NOT_JVMTI(return false); |
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230 } |
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231 inline static bool can_access_local_variables() { |
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232 JVMTI_ONLY(return _can_access_local_variables); |
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233 NOT_JVMTI(return false); |
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234 } |
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235 inline static bool can_hotswap_or_post_breakpoint() { |
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236 JVMTI_ONLY(return _can_hotswap_or_post_breakpoint); |
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237 NOT_JVMTI(return false); |
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238 } |
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239 inline static bool can_walk_any_space() { |
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240 JVMTI_ONLY(return _can_walk_any_space); |
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241 NOT_JVMTI(return false); |
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242 } |
0 | 243 |
244 // field access management | |
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245 static address get_field_access_count_addr() NOT_JVMTI_RETURN_(0); |
0 | 246 |
247 // field modification management | |
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248 static address get_field_modification_count_addr() NOT_JVMTI_RETURN_(0); |
0 | 249 |
250 // ----------------- | |
251 | |
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252 static bool is_jvmti_version(jint version) { |
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253 JVMTI_ONLY(return (version & JVMTI_VERSION_MASK) == JVMTI_VERSION_VALUE); |
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254 NOT_JVMTI(return false); |
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255 } |
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256 static bool is_jvmdi_version(jint version) { |
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257 JVMTI_ONLY(return (version & JVMTI_VERSION_MASK) == JVMDI_VERSION_VALUE); |
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258 NOT_JVMTI(return false); |
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259 } |
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260 static jint get_jvmti_interface(JavaVM *jvm, void **penv, jint version) NOT_JVMTI_RETURN_(0); |
1121 | 261 static void decode_version_values(jint version, int * major, int * minor, |
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262 int * micro) NOT_JVMTI_RETURN; |
0 | 263 |
264 // single stepping management methods | |
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265 static void at_single_stepping_point(JavaThread *thread, Method* method, address location) NOT_JVMTI_RETURN; |
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266 static void expose_single_stepping(JavaThread *thread) NOT_JVMTI_RETURN; |
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267 static bool hide_single_stepping(JavaThread *thread) NOT_JVMTI_RETURN_(false); |
0 | 268 |
269 // Methods that notify the debugger that something interesting has happened in the VM. | |
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270 static void post_vm_start () NOT_JVMTI_RETURN; |
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271 static void post_vm_initialized () NOT_JVMTI_RETURN; |
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272 static void post_vm_death () NOT_JVMTI_RETURN; |
0 | 273 |
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274 static void post_single_step (JavaThread *thread, Method* method, address location) NOT_JVMTI_RETURN; |
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275 static void post_raw_breakpoint (JavaThread *thread, Method* method, address location) NOT_JVMTI_RETURN; |
0 | 276 |
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277 static void post_exception_throw (JavaThread *thread, Method* method, address location, oop exception) NOT_JVMTI_RETURN; |
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278 static void notice_unwind_due_to_exception (JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) NOT_JVMTI_RETURN; |
0 | 279 |
280 static oop jni_GetField_probe (JavaThread *thread, jobject jobj, | |
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281 oop obj, Klass* klass, jfieldID fieldID, bool is_static) |
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282 NOT_JVMTI_RETURN_(NULL); |
0 | 283 static oop jni_GetField_probe_nh (JavaThread *thread, jobject jobj, |
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284 oop obj, Klass* klass, jfieldID fieldID, bool is_static) |
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285 NOT_JVMTI_RETURN_(NULL); |
0 | 286 static void post_field_access_by_jni (JavaThread *thread, oop obj, |
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287 Klass* klass, jfieldID fieldID, bool is_static) NOT_JVMTI_RETURN; |
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288 static void post_field_access (JavaThread *thread, Method* method, |
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289 address location, KlassHandle field_klass, Handle object, jfieldID field) NOT_JVMTI_RETURN; |
0 | 290 static oop jni_SetField_probe (JavaThread *thread, jobject jobj, |
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291 oop obj, Klass* klass, jfieldID fieldID, bool is_static, char sig_type, |
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292 jvalue *value) NOT_JVMTI_RETURN_(NULL); |
0 | 293 static oop jni_SetField_probe_nh (JavaThread *thread, jobject jobj, |
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294 oop obj, Klass* klass, jfieldID fieldID, bool is_static, char sig_type, |
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295 jvalue *value) NOT_JVMTI_RETURN_(NULL); |
0 | 296 static void post_field_modification_by_jni(JavaThread *thread, oop obj, |
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297 Klass* klass, jfieldID fieldID, bool is_static, char sig_type, |
0 | 298 jvalue *value); |
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299 static void post_raw_field_modification(JavaThread *thread, Method* method, |
0 | 300 address location, KlassHandle field_klass, Handle object, jfieldID field, |
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301 char sig_type, jvalue *value) NOT_JVMTI_RETURN; |
0 | 302 |
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303 static void post_method_entry (JavaThread *thread, Method* method, frame current_frame) NOT_JVMTI_RETURN; |
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304 static void post_method_exit (JavaThread *thread, Method* method, frame current_frame) NOT_JVMTI_RETURN; |
0 | 305 |
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306 static void post_class_load (JavaThread *thread, Klass* klass) NOT_JVMTI_RETURN; |
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307 static void post_class_unload (Klass* klass) NOT_JVMTI_RETURN; |
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308 static void post_class_prepare (JavaThread *thread, Klass* klass) NOT_JVMTI_RETURN; |
0 | 309 |
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310 static void post_thread_start (JavaThread *thread) NOT_JVMTI_RETURN; |
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311 static void post_thread_end (JavaThread *thread) NOT_JVMTI_RETURN; |
0 | 312 |
313 // Support for java.lang.instrument agent loading. | |
314 static bool _should_post_class_file_load_hook; | |
315 inline static void set_should_post_class_file_load_hook(bool on) { _should_post_class_file_load_hook = on; } | |
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316 inline static bool should_post_class_file_load_hook() { |
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317 JVMTI_ONLY(return _should_post_class_file_load_hook); |
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318 NOT_JVMTI(return false;) |
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319 } |
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320 static void post_class_file_load_hook(Symbol* h_name, Handle class_loader, |
0 | 321 Handle h_protection_domain, |
322 unsigned char **data_ptr, unsigned char **end_ptr, | |
323 unsigned char **cached_data_ptr, | |
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324 jint *cached_length_ptr) NOT_JVMTI_RETURN; |
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325 static void post_native_method_bind(Method* method, address* function_ptr) NOT_JVMTI_RETURN; |
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326 static void post_compiled_method_load(nmethod *nm) NOT_JVMTI_RETURN; |
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327 static void post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) NOT_JVMTI_RETURN; |
0 | 328 |
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329 // used to post a CompiledMethodUnload event |
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330 static void post_compiled_method_unload(jmethodID mid, const void *code_begin) NOT_JVMTI_RETURN; |
0 | 331 |
332 // similiar to post_dynamic_code_generated except that it can be used to | |
333 // post a DynamicCodeGenerated event while holding locks in the VM. Any event | |
334 // posted using this function is recorded by the enclosing event collector | |
335 // -- JvmtiDynamicCodeEventCollector. | |
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336 static void post_dynamic_code_generated_while_holding_locks(const char* name, address code_begin, address code_end) NOT_JVMTI_RETURN; |
0 | 337 |
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338 static void post_garbage_collection_finish() NOT_JVMTI_RETURN; |
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339 static void post_garbage_collection_start() NOT_JVMTI_RETURN; |
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340 static void post_data_dump() NOT_JVMTI_RETURN; |
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341 static void post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) NOT_JVMTI_RETURN; |
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342 static void post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) NOT_JVMTI_RETURN; |
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343 static void post_monitor_wait(JavaThread *thread, oop obj, jlong timeout) NOT_JVMTI_RETURN; |
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344 static void post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) NOT_JVMTI_RETURN; |
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345 static void post_object_free(JvmtiEnv* env, jlong tag) NOT_JVMTI_RETURN; |
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346 static void post_resource_exhausted(jint resource_exhausted_flags, const char* detail) NOT_JVMTI_RETURN; |
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347 static void record_vm_internal_object_allocation(oop object) NOT_JVMTI_RETURN; |
0 | 348 // Post objects collected by vm_object_alloc_event_collector. |
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349 static void post_vm_object_alloc(JavaThread *thread, oop object) NOT_JVMTI_RETURN; |
0 | 350 // Collects vm internal objects for later event posting. |
351 inline static void vm_object_alloc_event_collector(oop object) { | |
352 if (should_post_vm_object_alloc()) { | |
353 record_vm_internal_object_allocation(object); | |
354 } | |
355 } | |
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356 inline static void post_array_size_exhausted() { |
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357 if (should_post_resource_exhausted()) { |
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358 post_resource_exhausted(JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
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359 "Requested array size exceeds VM limit"); |
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360 } |
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361 } |
0 | 362 |
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363 static void cleanup_thread (JavaThread* thread) NOT_JVMTI_RETURN; |
0 | 364 |
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365 static void oops_do(OopClosure* f) NOT_JVMTI_RETURN; |
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366 static void weak_oops_do(BoolObjectClosure* b, OopClosure* f) NOT_JVMTI_RETURN; |
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367 static void gc_epilogue() NOT_JVMTI_RETURN; |
0 | 368 |
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369 static void transition_pending_onload_raw_monitors() NOT_JVMTI_RETURN; |
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370 |
0 | 371 // attach support |
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372 static jint load_agent_library(AttachOperation* op, outputStream* out) NOT_JVMTI_RETURN_(JNI_ERR); |
0 | 373 |
374 // SetNativeMethodPrefix support | |
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375 static char** get_all_native_method_prefixes(int* count_ptr) NOT_JVMTI_RETURN_(NULL); |
0 | 376 }; |
377 | |
378 // Support class used by JvmtiDynamicCodeEventCollector and others. It | |
379 // describes a single code blob by name and address range. | |
6197 | 380 class JvmtiCodeBlobDesc : public CHeapObj<mtInternal> { |
0 | 381 private: |
382 char _name[64]; | |
383 address _code_begin; | |
384 address _code_end; | |
385 | |
386 public: | |
387 JvmtiCodeBlobDesc(const char *name, address code_begin, address code_end) { | |
388 assert(name != NULL, "all code blobs must be named"); | |
389 strncpy(_name, name, sizeof(_name)); | |
390 _name[sizeof(_name)-1] = '\0'; | |
391 _code_begin = code_begin; | |
392 _code_end = code_end; | |
393 } | |
394 char* name() { return _name; } | |
395 address code_begin() { return _code_begin; } | |
396 address code_end() { return _code_end; } | |
397 }; | |
398 | |
399 // JvmtiEventCollector is a helper class to setup thread for | |
400 // event collection. | |
401 class JvmtiEventCollector : public StackObj { | |
402 private: | |
403 JvmtiEventCollector* _prev; // Save previous one to support nested event collector. | |
404 | |
405 public: | |
406 void setup_jvmti_thread_state(); // Set this collector in current thread. | |
407 void unset_jvmti_thread_state(); // Reset previous collector in current thread. | |
408 virtual bool is_dynamic_code_event() { return false; } | |
409 virtual bool is_vm_object_alloc_event(){ return false; } | |
410 JvmtiEventCollector *get_prev() { return _prev; } | |
411 }; | |
412 | |
413 // A JvmtiDynamicCodeEventCollector is a helper class for the JvmtiExport | |
414 // interface. It collects "dynamic code generated" events that are posted | |
415 // while holding locks. When the event collector goes out of scope the | |
416 // events will be posted. | |
417 // | |
418 // Usage :- | |
419 // | |
420 // { | |
421 // JvmtiDynamicCodeEventCollector event_collector; | |
422 // : | |
423 // { MutexLocker ml(...) | |
424 // : | |
425 // JvmtiExport::post_dynamic_code_generated_while_holding_locks(...) | |
426 // } | |
427 // // event collector goes out of scope => post events to profiler. | |
428 // } | |
429 | |
430 class JvmtiDynamicCodeEventCollector : public JvmtiEventCollector { | |
431 private: | |
432 GrowableArray<JvmtiCodeBlobDesc*>* _code_blobs; // collected code blob events | |
433 | |
434 friend class JvmtiExport; | |
435 void register_stub(const char* name, address start, address end); | |
436 | |
437 public: | |
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438 JvmtiDynamicCodeEventCollector() NOT_JVMTI_RETURN; |
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439 ~JvmtiDynamicCodeEventCollector() NOT_JVMTI_RETURN; |
0 | 440 bool is_dynamic_code_event() { return true; } |
441 | |
442 }; | |
443 | |
444 // Used to record vm internally allocated object oops and post | |
445 // vm object alloc event for objects visible to java world. | |
446 // Constructor enables JvmtiThreadState flag and all vm allocated | |
447 // objects are recorded in a growable array. When destructor is | |
448 // called the vm object alloc event is posted for each objects | |
449 // visible to java world. | |
450 // See jvm.cpp file for its usage. | |
451 // | |
452 class JvmtiVMObjectAllocEventCollector : public JvmtiEventCollector { | |
453 private: | |
454 GrowableArray<oop>* _allocated; // field to record vm internally allocated object oop. | |
455 bool _enable; // This flag is enabled in constructor and disabled | |
456 // in destructor before posting event. To avoid | |
457 // collection of objects allocated while running java code inside | |
458 // agent post_vm_object_alloc() event handler. | |
459 | |
460 //GC support | |
461 void oops_do(OopClosure* f); | |
462 | |
463 friend class JvmtiExport; | |
464 // Record vm allocated object oop. | |
465 inline void record_allocation(oop obj); | |
466 | |
467 //GC support | |
468 static void oops_do_for_all_threads(OopClosure* f); | |
469 | |
470 public: | |
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471 JvmtiVMObjectAllocEventCollector() NOT_JVMTI_RETURN; |
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472 ~JvmtiVMObjectAllocEventCollector() NOT_JVMTI_RETURN; |
0 | 473 bool is_vm_object_alloc_event() { return true; } |
474 | |
475 bool is_enabled() { return _enable; } | |
476 void set_enabled(bool on) { _enable = on; } | |
477 }; | |
478 | |
479 | |
480 | |
481 // Marker class to disable the posting of VMObjectAlloc events | |
482 // within its scope. | |
483 // | |
484 // Usage :- | |
485 // | |
486 // { | |
487 // NoJvmtiVMObjectAllocMark njm; | |
488 // : | |
489 // // VMObjAlloc event will not be posted | |
490 // JvmtiExport::vm_object_alloc_event_collector(obj); | |
491 // : | |
492 // } | |
493 | |
494 class NoJvmtiVMObjectAllocMark : public StackObj { | |
495 private: | |
496 // enclosing collector if enabled, NULL otherwise | |
497 JvmtiVMObjectAllocEventCollector *_collector; | |
498 | |
499 bool was_enabled() { return _collector != NULL; } | |
500 | |
501 public: | |
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502 NoJvmtiVMObjectAllocMark() NOT_JVMTI_RETURN; |
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503 ~NoJvmtiVMObjectAllocMark() NOT_JVMTI_RETURN; |
0 | 504 }; |
505 | |
506 | |
507 // Base class for reporting GC events to JVMTI. | |
508 class JvmtiGCMarker : public StackObj { | |
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509 public: |
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510 JvmtiGCMarker() NOT_JVMTI_RETURN; |
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511 ~JvmtiGCMarker() NOT_JVMTI_RETURN; |
0 | 512 }; |
513 | |
514 // JvmtiHideSingleStepping is a helper class for hiding | |
515 // internal single step events. | |
516 class JvmtiHideSingleStepping : public StackObj { | |
517 private: | |
518 bool _single_step_hidden; | |
519 JavaThread * _thread; | |
520 | |
521 public: | |
522 JvmtiHideSingleStepping(JavaThread * thread) { | |
523 assert(thread != NULL, "sanity check"); | |
524 | |
525 _single_step_hidden = false; | |
526 _thread = thread; | |
527 if (JvmtiExport::should_post_single_step()) { | |
528 _single_step_hidden = JvmtiExport::hide_single_stepping(_thread); | |
529 } | |
530 } | |
531 | |
532 ~JvmtiHideSingleStepping() { | |
533 if (_single_step_hidden) { | |
534 JvmtiExport::expose_single_stepping(_thread); | |
535 } | |
536 } | |
537 }; | |
538 | |
1972 | 539 #endif // SHARE_VM_PRIMS_JVMTIEXPORT_HPP |