Mercurial > hg > truffle
annotate src/share/vm/prims/jvmtiExport.hpp @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
| author | tschatzl |
|---|---|
| date | Fri, 10 Oct 2014 15:51:58 +0200 |
| parents | 55fb97c4c58d |
| children | 016b6a289fc4 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1998, 2013, 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" | |
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37 #include "utilities/macros.hpp" |
| 0 | 38 |
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39 // Must be included after jvmti.h. |
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40 #include "code/jvmticmlr.h" |
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41 |
| 0 | 42 // Forward declarations |
| 43 | |
| 44 class JvmtiEventControllerPrivate; | |
| 45 class JvmtiManageCapabilities; | |
| 46 class JvmtiEnv; | |
| 47 class JvmtiThreadState; | |
| 48 class AttachOperation; | |
| 49 | |
| 50 #define JVMTI_SUPPORT_FLAG(key) \ | |
| 51 private: \ | |
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52 static bool _##key; \ |
| 0 | 53 public: \ |
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54 inline static void set_##key(bool on) { \ |
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55 JVMTI_ONLY(_##key = (on != 0)); \ |
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56 NOT_JVMTI(report_unsupported(on)); \ |
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57 } \ |
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58 inline static bool key() { \ |
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59 JVMTI_ONLY(return _##key); \ |
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60 NOT_JVMTI(return false); \ |
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61 } |
| 0 | 62 |
| 63 | |
| 64 // This class contains the JVMTI interface for the rest of hotspot. | |
| 65 // | |
| 66 class JvmtiExport : public AllStatic { | |
| 3939 | 67 friend class VMStructs; |
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68 friend class CompileReplay; |
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69 |
| 0 | 70 private: |
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71 |
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72 #if INCLUDE_JVMTI |
| 0 | 73 static int _field_access_count; |
| 74 static int _field_modification_count; | |
| 75 | |
| 76 static bool _can_access_local_variables; | |
| 77 static bool _can_hotswap_or_post_breakpoint; | |
| 78 static bool _can_modify_any_class; | |
| 79 static bool _can_walk_any_space; | |
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80 #endif // INCLUDE_JVMTI |
| 0 | 81 |
| 82 JVMTI_SUPPORT_FLAG(can_get_source_debug_extension) | |
| 83 JVMTI_SUPPORT_FLAG(can_maintain_original_method_order) | |
| 84 JVMTI_SUPPORT_FLAG(can_post_interpreter_events) | |
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85 JVMTI_SUPPORT_FLAG(can_post_on_exceptions) |
| 0 | 86 JVMTI_SUPPORT_FLAG(can_post_breakpoint) |
| 87 JVMTI_SUPPORT_FLAG(can_post_field_access) | |
| 88 JVMTI_SUPPORT_FLAG(can_post_field_modification) | |
| 89 JVMTI_SUPPORT_FLAG(can_post_method_entry) | |
| 90 JVMTI_SUPPORT_FLAG(can_post_method_exit) | |
| 91 JVMTI_SUPPORT_FLAG(can_pop_frame) | |
| 92 JVMTI_SUPPORT_FLAG(can_force_early_return) | |
| 93 | |
| 94 friend class JvmtiEventControllerPrivate; // should only modify these flags | |
| 95 JVMTI_SUPPORT_FLAG(should_post_single_step) | |
| 96 JVMTI_SUPPORT_FLAG(should_post_field_access) | |
| 97 JVMTI_SUPPORT_FLAG(should_post_field_modification) | |
| 98 JVMTI_SUPPORT_FLAG(should_post_class_load) | |
| 99 JVMTI_SUPPORT_FLAG(should_post_class_prepare) | |
| 100 JVMTI_SUPPORT_FLAG(should_post_class_unload) | |
| 101 JVMTI_SUPPORT_FLAG(should_post_native_method_bind) | |
| 102 JVMTI_SUPPORT_FLAG(should_post_compiled_method_load) | |
| 103 JVMTI_SUPPORT_FLAG(should_post_compiled_method_unload) | |
| 104 JVMTI_SUPPORT_FLAG(should_post_dynamic_code_generated) | |
| 105 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_enter) | |
| 106 JVMTI_SUPPORT_FLAG(should_post_monitor_contended_entered) | |
| 107 JVMTI_SUPPORT_FLAG(should_post_monitor_wait) | |
| 108 JVMTI_SUPPORT_FLAG(should_post_monitor_waited) | |
| 109 JVMTI_SUPPORT_FLAG(should_post_data_dump) | |
| 110 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_start) | |
| 111 JVMTI_SUPPORT_FLAG(should_post_garbage_collection_finish) | |
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112 JVMTI_SUPPORT_FLAG(should_post_on_exceptions) |
| 0 | 113 |
| 114 // ------ the below maybe don't have to be (but are for now) | |
| 115 // fixed conditions here ------------ | |
| 116 // any events can be enabled | |
| 117 JVMTI_SUPPORT_FLAG(should_post_thread_life) | |
| 118 JVMTI_SUPPORT_FLAG(should_post_object_free) | |
| 119 JVMTI_SUPPORT_FLAG(should_post_resource_exhausted) | |
| 120 | |
| 121 // we are holding objects on the heap - need to talk to GC - e.g. | |
| 122 // breakpoint info | |
| 123 JVMTI_SUPPORT_FLAG(should_clean_up_heap_objects) | |
| 124 JVMTI_SUPPORT_FLAG(should_post_vm_object_alloc) | |
| 125 | |
| 126 // If flag cannot be implemented, give an error if on=true | |
| 127 static void report_unsupported(bool on); | |
| 128 | |
| 129 // these should only be called by the friend class | |
| 130 friend class JvmtiManageCapabilities; | |
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131 inline static void set_can_modify_any_class(bool on) { |
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132 JVMTI_ONLY(_can_modify_any_class = (on != 0);) |
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133 } |
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134 inline static void set_can_access_local_variables(bool on) { |
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135 JVMTI_ONLY(_can_access_local_variables = (on != 0);) |
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136 } |
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137 inline static void set_can_hotswap_or_post_breakpoint(bool on) { |
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138 JVMTI_ONLY(_can_hotswap_or_post_breakpoint = (on != 0);) |
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139 } |
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140 inline static void set_can_walk_any_space(bool on) { |
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141 JVMTI_ONLY(_can_walk_any_space = (on != 0);) |
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142 } |
| 0 | 143 |
| 144 enum { | |
| 145 JVMTI_VERSION_MASK = 0x70000000, | |
| 146 JVMTI_VERSION_VALUE = 0x30000000, | |
| 147 JVMDI_VERSION_VALUE = 0x20000000 | |
| 148 }; | |
| 149 | |
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150 static void post_field_modification(JavaThread *thread, Method* method, address location, |
| 0 | 151 KlassHandle field_klass, Handle object, jfieldID field, |
| 152 char sig_type, jvalue *value); | |
| 153 | |
| 154 | |
| 155 // posts a DynamicCodeGenerated event (internal/private implementation). | |
| 156 // The public post_dynamic_code_generated* functions make use of the | |
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157 // internal implementation. Also called from JvmtiDeferredEvent::post() |
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158 static void post_dynamic_code_generated_internal(const char *name, const void *code_begin, const void *code_end) NOT_JVMTI_RETURN; |
| 0 | 159 |
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160 private: |
| 0 | 161 |
| 162 // GenerateEvents support to allow posting of CompiledMethodLoad and | |
| 163 // DynamicCodeGenerated events for a given environment. | |
| 164 friend class JvmtiCodeBlobEvents; | |
| 165 | |
| 166 static void post_compiled_method_load(JvmtiEnv* env, const jmethodID method, const jint length, | |
| 167 const void *code_begin, const jint map_length, | |
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168 const jvmtiAddrLocationMap* map) NOT_JVMTI_RETURN; |
| 0 | 169 static void post_dynamic_code_generated(JvmtiEnv* env, const char *name, const void *code_begin, |
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170 const void *code_end) NOT_JVMTI_RETURN; |
| 0 | 171 |
| 172 // The RedefineClasses() API breaks some invariants in the "regular" | |
| 173 // system. For example, there are sanity checks when GC'ing nmethods | |
| 174 // that require the containing class to be unloading. However, when a | |
| 175 // method is redefined, the old method and nmethod can become GC'able | |
| 176 // without the containing class unloading. The state of becoming | |
| 177 // GC'able can be asynchronous to the RedefineClasses() call since | |
| 178 // the old method may still be running and cannot be GC'ed until | |
| 179 // after all old invocations have finished. Additionally, a method | |
| 180 // that has not been redefined may have an nmethod that depends on | |
| 181 // the redefined method. The dependent nmethod will get deopted in | |
| 182 // this case and may also be GC'able without the containing class | |
| 183 // being unloaded. | |
| 184 // | |
| 185 // This flag indicates whether RedefineClasses() has ever redefined | |
| 186 // one or more classes during the lifetime of the VM. The flag should | |
| 187 // only be set by the friend class and can be queried by other sub | |
| 188 // systems as needed to relax invariant checks. | |
| 189 static bool _has_redefined_a_class; | |
| 190 friend class VM_RedefineClasses; | |
| 191 inline static void set_has_redefined_a_class() { | |
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192 JVMTI_ONLY(_has_redefined_a_class = true;) |
| 0 | 193 } |
| 194 // Flag to indicate if the compiler has recorded all dependencies. When the | |
| 195 // can_redefine_classes capability is enabled in the OnLoad phase then the compiler | |
| 196 // records all dependencies from startup. However if the capability is first | |
| 197 // enabled some time later then the dependencies recorded by the compiler | |
| 198 // are incomplete. This flag is used by RedefineClasses to know if the | |
| 199 // dependency information is complete or not. | |
| 200 static bool _all_dependencies_are_recorded; | |
| 201 | |
| 202 public: | |
| 203 inline static bool has_redefined_a_class() { | |
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204 JVMTI_ONLY(return _has_redefined_a_class); |
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205 NOT_JVMTI(return false); |
| 0 | 206 } |
| 207 | |
| 208 inline static bool all_dependencies_are_recorded() { | |
| 209 return _all_dependencies_are_recorded; | |
| 210 } | |
| 211 | |
| 212 inline static void set_all_dependencies_are_recorded(bool on) { | |
| 213 _all_dependencies_are_recorded = (on != 0); | |
| 214 } | |
| 215 | |
| 216 | |
| 217 // let JVMTI know that the JVM_OnLoad code is running | |
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218 static void enter_onload_phase() NOT_JVMTI_RETURN; |
| 0 | 219 |
| 220 // let JVMTI know that the VM isn't up yet (and JVM_OnLoad code isn't running) | |
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221 static void enter_primordial_phase() NOT_JVMTI_RETURN; |
| 0 | 222 |
| 223 // let JVMTI know that the VM isn't up yet but JNI is live | |
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224 static void enter_start_phase() NOT_JVMTI_RETURN; |
| 0 | 225 |
| 226 // let JVMTI know that the VM is fully up and running now | |
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227 static void enter_live_phase() NOT_JVMTI_RETURN; |
| 0 | 228 |
| 229 // ------ can_* conditions (below) are set at OnLoad and never changed ------------ | |
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230 inline static bool can_modify_any_class() { |
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231 JVMTI_ONLY(return _can_modify_any_class); |
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232 NOT_JVMTI(return false); |
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233 } |
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234 inline static bool can_access_local_variables() { |
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235 JVMTI_ONLY(return _can_access_local_variables); |
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236 NOT_JVMTI(return false); |
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237 } |
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238 inline static bool can_hotswap_or_post_breakpoint() { |
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239 JVMTI_ONLY(return _can_hotswap_or_post_breakpoint); |
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240 NOT_JVMTI(return false); |
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241 } |
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242 inline static bool can_walk_any_space() { |
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243 JVMTI_ONLY(return _can_walk_any_space); |
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244 NOT_JVMTI(return false); |
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245 } |
| 0 | 246 |
| 247 // field access management | |
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248 static address get_field_access_count_addr() NOT_JVMTI_RETURN_(0); |
| 0 | 249 |
| 250 // field modification management | |
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251 static address get_field_modification_count_addr() NOT_JVMTI_RETURN_(0); |
| 0 | 252 |
| 253 // ----------------- | |
| 254 | |
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255 static bool is_jvmti_version(jint version) { |
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256 JVMTI_ONLY(return (version & JVMTI_VERSION_MASK) == JVMTI_VERSION_VALUE); |
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257 NOT_JVMTI(return false); |
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258 } |
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259 static bool is_jvmdi_version(jint version) { |
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260 JVMTI_ONLY(return (version & JVMTI_VERSION_MASK) == JVMDI_VERSION_VALUE); |
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261 NOT_JVMTI(return false); |
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262 } |
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263 static jint get_jvmti_interface(JavaVM *jvm, void **penv, jint version) NOT_JVMTI_RETURN_(0); |
| 1121 | 264 static void decode_version_values(jint version, int * major, int * minor, |
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265 int * micro) NOT_JVMTI_RETURN; |
| 0 | 266 |
| 267 // single stepping management methods | |
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268 static void at_single_stepping_point(JavaThread *thread, Method* method, address location) NOT_JVMTI_RETURN; |
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269 static void expose_single_stepping(JavaThread *thread) NOT_JVMTI_RETURN; |
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270 static bool hide_single_stepping(JavaThread *thread) NOT_JVMTI_RETURN_(false); |
| 0 | 271 |
| 272 // Methods that notify the debugger that something interesting has happened in the VM. | |
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273 static void post_vm_start () NOT_JVMTI_RETURN; |
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274 static void post_vm_initialized () NOT_JVMTI_RETURN; |
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275 static void post_vm_death () NOT_JVMTI_RETURN; |
| 0 | 276 |
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277 static void post_single_step (JavaThread *thread, Method* method, address location) NOT_JVMTI_RETURN; |
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278 static void post_raw_breakpoint (JavaThread *thread, Method* method, address location) NOT_JVMTI_RETURN; |
| 0 | 279 |
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280 static void post_exception_throw (JavaThread *thread, Method* method, address location, oop exception) NOT_JVMTI_RETURN; |
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281 static void notice_unwind_due_to_exception (JavaThread *thread, Method* method, address location, oop exception, bool in_handler_frame) NOT_JVMTI_RETURN; |
| 0 | 282 |
| 283 static oop jni_GetField_probe (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 oop jni_GetField_probe_nh (JavaThread *thread, jobject jobj, |
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287 oop obj, Klass* klass, jfieldID fieldID, bool is_static) |
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288 NOT_JVMTI_RETURN_(NULL); |
| 0 | 289 static void post_field_access_by_jni (JavaThread *thread, oop obj, |
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290 Klass* klass, jfieldID fieldID, bool is_static) NOT_JVMTI_RETURN; |
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291 static void post_field_access (JavaThread *thread, Method* method, |
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292 address location, KlassHandle field_klass, Handle object, jfieldID field) NOT_JVMTI_RETURN; |
| 0 | 293 static oop jni_SetField_probe (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 oop jni_SetField_probe_nh (JavaThread *thread, jobject jobj, |
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297 oop obj, Klass* klass, jfieldID fieldID, bool is_static, char sig_type, |
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298 jvalue *value) NOT_JVMTI_RETURN_(NULL); |
| 0 | 299 static void post_field_modification_by_jni(JavaThread *thread, oop obj, |
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300 Klass* klass, jfieldID fieldID, bool is_static, char sig_type, |
| 0 | 301 jvalue *value); |
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302 static void post_raw_field_modification(JavaThread *thread, Method* method, |
| 0 | 303 address location, KlassHandle field_klass, Handle object, jfieldID field, |
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304 char sig_type, jvalue *value) NOT_JVMTI_RETURN; |
| 0 | 305 |
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306 static void post_method_entry (JavaThread *thread, Method* method, frame current_frame) NOT_JVMTI_RETURN; |
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307 static void post_method_exit (JavaThread *thread, Method* method, frame current_frame) NOT_JVMTI_RETURN; |
| 0 | 308 |
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309 static void post_class_load (JavaThread *thread, Klass* klass) NOT_JVMTI_RETURN; |
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310 static void post_class_unload (Klass* klass) NOT_JVMTI_RETURN; |
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311 static void post_class_prepare (JavaThread *thread, Klass* klass) NOT_JVMTI_RETURN; |
| 0 | 312 |
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313 static void post_thread_start (JavaThread *thread) NOT_JVMTI_RETURN; |
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314 static void post_thread_end (JavaThread *thread) NOT_JVMTI_RETURN; |
| 0 | 315 |
| 316 // Support for java.lang.instrument agent loading. | |
| 317 static bool _should_post_class_file_load_hook; | |
| 318 inline static void set_should_post_class_file_load_hook(bool on) { _should_post_class_file_load_hook = on; } | |
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319 inline static bool should_post_class_file_load_hook() { |
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320 JVMTI_ONLY(return _should_post_class_file_load_hook); |
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321 NOT_JVMTI(return false;) |
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322 } |
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323 static void post_class_file_load_hook(Symbol* h_name, Handle class_loader, |
| 0 | 324 Handle h_protection_domain, |
| 325 unsigned char **data_ptr, unsigned char **end_ptr, | |
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326 JvmtiCachedClassFileData **cache_ptr) NOT_JVMTI_RETURN; |
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327 static void post_native_method_bind(Method* method, address* function_ptr) NOT_JVMTI_RETURN; |
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328 static void post_compiled_method_load(nmethod *nm) NOT_JVMTI_RETURN; |
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329 static void post_dynamic_code_generated(const char *name, const void *code_begin, const void *code_end) NOT_JVMTI_RETURN; |
| 0 | 330 |
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331 // used to post a CompiledMethodUnload event |
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332 static void post_compiled_method_unload(jmethodID mid, const void *code_begin) NOT_JVMTI_RETURN; |
| 0 | 333 |
| 334 // similiar to post_dynamic_code_generated except that it can be used to | |
| 335 // post a DynamicCodeGenerated event while holding locks in the VM. Any event | |
| 336 // posted using this function is recorded by the enclosing event collector | |
| 337 // -- JvmtiDynamicCodeEventCollector. | |
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338 static void post_dynamic_code_generated_while_holding_locks(const char* name, address code_begin, address code_end) NOT_JVMTI_RETURN; |
| 0 | 339 |
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340 static void post_garbage_collection_finish() NOT_JVMTI_RETURN; |
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341 static void post_garbage_collection_start() NOT_JVMTI_RETURN; |
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342 static void post_data_dump() NOT_JVMTI_RETURN; |
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343 static void post_monitor_contended_enter(JavaThread *thread, ObjectMonitor *obj_mntr) NOT_JVMTI_RETURN; |
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344 static void post_monitor_contended_entered(JavaThread *thread, ObjectMonitor *obj_mntr) NOT_JVMTI_RETURN; |
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345 static void post_monitor_wait(JavaThread *thread, oop obj, jlong timeout) NOT_JVMTI_RETURN; |
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346 static void post_monitor_waited(JavaThread *thread, ObjectMonitor *obj_mntr, jboolean timed_out) NOT_JVMTI_RETURN; |
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347 static void post_object_free(JvmtiEnv* env, jlong tag) NOT_JVMTI_RETURN; |
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348 static void post_resource_exhausted(jint resource_exhausted_flags, const char* detail) NOT_JVMTI_RETURN; |
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349 static void record_vm_internal_object_allocation(oop object) NOT_JVMTI_RETURN; |
| 0 | 350 // Post objects collected by vm_object_alloc_event_collector. |
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351 static void post_vm_object_alloc(JavaThread *thread, oop object) NOT_JVMTI_RETURN; |
| 0 | 352 // Collects vm internal objects for later event posting. |
| 353 inline static void vm_object_alloc_event_collector(oop object) { | |
| 354 if (should_post_vm_object_alloc()) { | |
| 355 record_vm_internal_object_allocation(object); | |
| 356 } | |
| 357 } | |
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358 inline static void post_array_size_exhausted() { |
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359 if (should_post_resource_exhausted()) { |
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360 post_resource_exhausted(JVMTI_RESOURCE_EXHAUSTED_OOM_ERROR, |
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361 "Requested array size exceeds VM limit"); |
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362 } |
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363 } |
| 0 | 364 |
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365 static void cleanup_thread (JavaThread* thread) NOT_JVMTI_RETURN; |
| 0 | 366 |
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367 static void oops_do(OopClosure* f) NOT_JVMTI_RETURN; |
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368 static void weak_oops_do(BoolObjectClosure* b, OopClosure* f) NOT_JVMTI_RETURN; |
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369 static void gc_epilogue() NOT_JVMTI_RETURN; |
| 0 | 370 |
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371 static void transition_pending_onload_raw_monitors() NOT_JVMTI_RETURN; |
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372 |
| 0 | 373 // attach support |
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374 static jint load_agent_library(AttachOperation* op, outputStream* out) NOT_JVMTI_RETURN_(JNI_ERR); |
| 0 | 375 |
| 376 // SetNativeMethodPrefix support | |
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377 static char** get_all_native_method_prefixes(int* count_ptr) NOT_JVMTI_RETURN_(NULL); |
| 0 | 378 }; |
| 379 | |
| 380 // Support class used by JvmtiDynamicCodeEventCollector and others. It | |
| 381 // describes a single code blob by name and address range. | |
| 6197 | 382 class JvmtiCodeBlobDesc : public CHeapObj<mtInternal> { |
| 0 | 383 private: |
| 384 char _name[64]; | |
| 385 address _code_begin; | |
| 386 address _code_end; | |
| 387 | |
| 388 public: | |
| 389 JvmtiCodeBlobDesc(const char *name, address code_begin, address code_end) { | |
| 390 assert(name != NULL, "all code blobs must be named"); | |
| 391 strncpy(_name, name, sizeof(_name)); | |
| 392 _name[sizeof(_name)-1] = '\0'; | |
| 393 _code_begin = code_begin; | |
| 394 _code_end = code_end; | |
| 395 } | |
| 396 char* name() { return _name; } | |
| 397 address code_begin() { return _code_begin; } | |
| 398 address code_end() { return _code_end; } | |
| 399 }; | |
| 400 | |
| 401 // JvmtiEventCollector is a helper class to setup thread for | |
| 402 // event collection. | |
| 403 class JvmtiEventCollector : public StackObj { | |
| 404 private: | |
| 405 JvmtiEventCollector* _prev; // Save previous one to support nested event collector. | |
| 406 | |
| 407 public: | |
| 408 void setup_jvmti_thread_state(); // Set this collector in current thread. | |
| 409 void unset_jvmti_thread_state(); // Reset previous collector in current thread. | |
| 410 virtual bool is_dynamic_code_event() { return false; } | |
| 411 virtual bool is_vm_object_alloc_event(){ return false; } | |
| 412 JvmtiEventCollector *get_prev() { return _prev; } | |
| 413 }; | |
| 414 | |
| 415 // A JvmtiDynamicCodeEventCollector is a helper class for the JvmtiExport | |
| 416 // interface. It collects "dynamic code generated" events that are posted | |
| 417 // while holding locks. When the event collector goes out of scope the | |
| 418 // events will be posted. | |
| 419 // | |
| 420 // Usage :- | |
| 421 // | |
| 422 // { | |
| 423 // JvmtiDynamicCodeEventCollector event_collector; | |
| 424 // : | |
| 425 // { MutexLocker ml(...) | |
| 426 // : | |
| 427 // JvmtiExport::post_dynamic_code_generated_while_holding_locks(...) | |
| 428 // } | |
| 429 // // event collector goes out of scope => post events to profiler. | |
| 430 // } | |
| 431 | |
| 432 class JvmtiDynamicCodeEventCollector : public JvmtiEventCollector { | |
| 433 private: | |
| 434 GrowableArray<JvmtiCodeBlobDesc*>* _code_blobs; // collected code blob events | |
| 435 | |
| 436 friend class JvmtiExport; | |
| 437 void register_stub(const char* name, address start, address end); | |
| 438 | |
| 439 public: | |
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440 JvmtiDynamicCodeEventCollector() NOT_JVMTI_RETURN; |
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441 ~JvmtiDynamicCodeEventCollector() NOT_JVMTI_RETURN; |
| 0 | 442 bool is_dynamic_code_event() { return true; } |
| 443 | |
| 444 }; | |
| 445 | |
| 446 // Used to record vm internally allocated object oops and post | |
| 447 // vm object alloc event for objects visible to java world. | |
| 448 // Constructor enables JvmtiThreadState flag and all vm allocated | |
| 449 // objects are recorded in a growable array. When destructor is | |
| 450 // called the vm object alloc event is posted for each objects | |
| 451 // visible to java world. | |
| 452 // See jvm.cpp file for its usage. | |
| 453 // | |
| 454 class JvmtiVMObjectAllocEventCollector : public JvmtiEventCollector { | |
| 455 private: | |
| 456 GrowableArray<oop>* _allocated; // field to record vm internally allocated object oop. | |
| 457 bool _enable; // This flag is enabled in constructor and disabled | |
| 458 // in destructor before posting event. To avoid | |
| 459 // collection of objects allocated while running java code inside | |
| 460 // agent post_vm_object_alloc() event handler. | |
| 461 | |
| 462 //GC support | |
| 463 void oops_do(OopClosure* f); | |
| 464 | |
| 465 friend class JvmtiExport; | |
| 466 // Record vm allocated object oop. | |
| 467 inline void record_allocation(oop obj); | |
| 468 | |
| 469 //GC support | |
| 470 static void oops_do_for_all_threads(OopClosure* f); | |
| 471 | |
| 472 public: | |
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473 JvmtiVMObjectAllocEventCollector() NOT_JVMTI_RETURN; |
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474 ~JvmtiVMObjectAllocEventCollector() NOT_JVMTI_RETURN; |
| 0 | 475 bool is_vm_object_alloc_event() { return true; } |
| 476 | |
| 477 bool is_enabled() { return _enable; } | |
| 478 void set_enabled(bool on) { _enable = on; } | |
| 479 }; | |
| 480 | |
| 481 | |
| 482 | |
| 483 // Marker class to disable the posting of VMObjectAlloc events | |
| 484 // within its scope. | |
| 485 // | |
| 486 // Usage :- | |
| 487 // | |
| 488 // { | |
| 489 // NoJvmtiVMObjectAllocMark njm; | |
| 490 // : | |
| 491 // // VMObjAlloc event will not be posted | |
| 492 // JvmtiExport::vm_object_alloc_event_collector(obj); | |
| 493 // : | |
| 494 // } | |
| 495 | |
| 496 class NoJvmtiVMObjectAllocMark : public StackObj { | |
| 497 private: | |
| 498 // enclosing collector if enabled, NULL otherwise | |
| 499 JvmtiVMObjectAllocEventCollector *_collector; | |
| 500 | |
| 501 bool was_enabled() { return _collector != NULL; } | |
| 502 | |
| 503 public: | |
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504 NoJvmtiVMObjectAllocMark() NOT_JVMTI_RETURN; |
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505 ~NoJvmtiVMObjectAllocMark() NOT_JVMTI_RETURN; |
| 0 | 506 }; |
| 507 | |
| 508 | |
| 509 // Base class for reporting GC events to JVMTI. | |
| 510 class JvmtiGCMarker : public StackObj { | |
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511 public: |
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512 JvmtiGCMarker() NOT_JVMTI_RETURN; |
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513 ~JvmtiGCMarker() NOT_JVMTI_RETURN; |
| 0 | 514 }; |
| 515 | |
| 516 // JvmtiHideSingleStepping is a helper class for hiding | |
| 517 // internal single step events. | |
| 518 class JvmtiHideSingleStepping : public StackObj { | |
| 519 private: | |
| 520 bool _single_step_hidden; | |
| 521 JavaThread * _thread; | |
| 522 | |
| 523 public: | |
| 524 JvmtiHideSingleStepping(JavaThread * thread) { | |
| 525 assert(thread != NULL, "sanity check"); | |
| 526 | |
| 527 _single_step_hidden = false; | |
| 528 _thread = thread; | |
| 529 if (JvmtiExport::should_post_single_step()) { | |
| 530 _single_step_hidden = JvmtiExport::hide_single_stepping(_thread); | |
| 531 } | |
| 532 } | |
| 533 | |
| 534 ~JvmtiHideSingleStepping() { | |
| 535 if (_single_step_hidden) { | |
| 536 JvmtiExport::expose_single_stepping(_thread); | |
| 537 } | |
| 538 } | |
| 539 }; | |
| 540 | |
| 1972 | 541 #endif // SHARE_VM_PRIMS_JVMTIEXPORT_HPP |