1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <stdlib.h> 18 #include <string.h> 19 #include <unistd.h> 20 #include <memory> 21 #include <string> 22 23 #include "atomic.h" 24 #include "base/hex_dump.h" 25 #include "base/logging.h" 26 #include "base/macros.h" 27 #include "base/stringprintf.h" 28 #include "debugger.h" 29 #include "jdwp/jdwp_constants.h" 30 #include "jdwp/jdwp_event.h" 31 #include "jdwp/jdwp_expand_buf.h" 32 #include "jdwp/jdwp_priv.h" 33 #include "runtime.h" 34 #include "thread-inl.h" 35 36 namespace art { 37 38 namespace JDWP { 39 40 std::string DescribeField(const FieldId& field_id) { 41 return StringPrintf("%#x (%s)", field_id, Dbg::GetFieldName(field_id).c_str()); 42 } 43 44 std::string DescribeMethod(const MethodId& method_id) { 45 return StringPrintf("%#x (%s)", method_id, Dbg::GetMethodName(method_id).c_str()); 46 } 47 48 std::string DescribeRefTypeId(const RefTypeId& ref_type_id) { 49 std::string signature("unknown"); 50 Dbg::GetSignature(ref_type_id, &signature); 51 return StringPrintf("%#" PRIx64 " (%s)", ref_type_id, signature.c_str()); 52 } 53 54 // Helper function: write a variable-width value into the output input buffer. 55 static void WriteValue(ExpandBuf* pReply, int width, uint64_t value) { 56 switch (width) { 57 case 1: expandBufAdd1(pReply, value); break; 58 case 2: expandBufAdd2BE(pReply, value); break; 59 case 4: expandBufAdd4BE(pReply, value); break; 60 case 8: expandBufAdd8BE(pReply, value); break; 61 default: LOG(FATAL) << width; break; 62 } 63 } 64 65 static JdwpError WriteTaggedObject(ExpandBuf* reply, ObjectId object_id) 66 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 67 uint8_t tag; 68 JdwpError rc = Dbg::GetObjectTag(object_id, tag); 69 if (rc == ERR_NONE) { 70 expandBufAdd1(reply, tag); 71 expandBufAddObjectId(reply, object_id); 72 } 73 return rc; 74 } 75 76 static JdwpError WriteTaggedObjectList(ExpandBuf* reply, const std::vector<ObjectId>& objects) 77 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 78 expandBufAdd4BE(reply, objects.size()); 79 for (size_t i = 0; i < objects.size(); ++i) { 80 JdwpError rc = WriteTaggedObject(reply, objects[i]); 81 if (rc != ERR_NONE) { 82 return rc; 83 } 84 } 85 return ERR_NONE; 86 } 87 88 /* 89 * Common code for *_InvokeMethod requests. 90 * 91 * If "is_constructor" is set, this returns "object_id" rather than the 92 * expected-to-be-void return value of the called function. 93 */ 94 static JdwpError FinishInvoke(JdwpState*, Request& request, ExpandBuf* pReply, 95 ObjectId thread_id, ObjectId object_id, 96 RefTypeId class_id, MethodId method_id, bool is_constructor) 97 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 98 CHECK(!is_constructor || object_id != 0); 99 100 int32_t arg_count = request.ReadSigned32("argument count"); 101 102 VLOG(jdwp) << StringPrintf(" --> thread_id=%#" PRIx64 " object_id=%#" PRIx64, 103 thread_id, object_id); 104 VLOG(jdwp) << StringPrintf(" class_id=%#" PRIx64 " method_id=%x %s.%s", class_id, 105 method_id, Dbg::GetClassName(class_id).c_str(), 106 Dbg::GetMethodName(method_id).c_str()); 107 VLOG(jdwp) << StringPrintf(" %d args:", arg_count); 108 109 std::unique_ptr<JdwpTag[]> argTypes(arg_count > 0 ? new JdwpTag[arg_count] : NULL); 110 std::unique_ptr<uint64_t[]> argValues(arg_count > 0 ? new uint64_t[arg_count] : NULL); 111 for (int32_t i = 0; i < arg_count; ++i) { 112 argTypes[i] = request.ReadTag(); 113 size_t width = Dbg::GetTagWidth(argTypes[i]); 114 argValues[i] = request.ReadValue(width); 115 VLOG(jdwp) << " " << argTypes[i] << StringPrintf("(%zd): %#" PRIx64, width, 116 argValues[i]); 117 } 118 119 uint32_t options = request.ReadUnsigned32("InvokeOptions bit flags"); 120 VLOG(jdwp) << StringPrintf(" options=0x%04x%s%s", options, 121 (options & INVOKE_SINGLE_THREADED) ? " (SINGLE_THREADED)" : "", 122 (options & INVOKE_NONVIRTUAL) ? " (NONVIRTUAL)" : ""); 123 124 JdwpTag resultTag; 125 uint64_t resultValue; 126 ObjectId exceptObjId; 127 JdwpError err = Dbg::InvokeMethod(thread_id, object_id, class_id, method_id, arg_count, argValues.get(), argTypes.get(), options, &resultTag, &resultValue, &exceptObjId); 128 if (err != ERR_NONE) { 129 return err; 130 } 131 132 if (err == ERR_NONE) { 133 if (is_constructor) { 134 // If we invoked a constructor (which actually returns void), return the receiver, 135 // unless we threw, in which case we return NULL. 136 resultTag = JT_OBJECT; 137 resultValue = (exceptObjId == 0) ? object_id : 0; 138 } 139 140 size_t width = Dbg::GetTagWidth(resultTag); 141 expandBufAdd1(pReply, resultTag); 142 if (width != 0) { 143 WriteValue(pReply, width, resultValue); 144 } 145 expandBufAdd1(pReply, JT_OBJECT); 146 expandBufAddObjectId(pReply, exceptObjId); 147 148 VLOG(jdwp) << " --> returned " << resultTag 149 << StringPrintf(" %#" PRIx64 " (except=%#" PRIx64 ")", resultValue, exceptObjId); 150 151 /* show detailed debug output */ 152 if (resultTag == JT_STRING && exceptObjId == 0) { 153 if (resultValue != 0) { 154 if (VLOG_IS_ON(jdwp)) { 155 std::string result_string; 156 JDWP::JdwpError error = Dbg::StringToUtf8(resultValue, &result_string); 157 CHECK_EQ(error, JDWP::ERR_NONE); 158 VLOG(jdwp) << " string '" << result_string << "'"; 159 } 160 } else { 161 VLOG(jdwp) << " string (null)"; 162 } 163 } 164 } 165 166 return err; 167 } 168 169 static JdwpError VM_Version(JdwpState*, Request&, ExpandBuf* pReply) 170 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 171 // Text information on runtime version. 172 std::string version(StringPrintf("Android Runtime %s", Runtime::Current()->GetVersion())); 173 expandBufAddUtf8String(pReply, version); 174 175 // JDWP version numbers, major and minor. 176 expandBufAdd4BE(pReply, 1); 177 expandBufAdd4BE(pReply, 6); 178 179 // "java.version". 180 expandBufAddUtf8String(pReply, "1.6.0"); 181 182 // "java.vm.name". 183 expandBufAddUtf8String(pReply, "Dalvik"); 184 185 return ERR_NONE; 186 } 187 188 /* 189 * Given a class JNI signature (e.g. "Ljava/lang/Error;"), return the 190 * referenceTypeID. We need to send back more than one if the class has 191 * been loaded by multiple class loaders. 192 */ 193 static JdwpError VM_ClassesBySignature(JdwpState*, Request& request, ExpandBuf* pReply) 194 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 195 std::string classDescriptor(request.ReadUtf8String()); 196 197 std::vector<RefTypeId> ids; 198 Dbg::FindLoadedClassBySignature(classDescriptor.c_str(), ids); 199 200 expandBufAdd4BE(pReply, ids.size()); 201 202 for (size_t i = 0; i < ids.size(); ++i) { 203 // Get class vs. interface and status flags. 204 JDWP::JdwpTypeTag type_tag; 205 uint32_t class_status; 206 JDWP::JdwpError status = Dbg::GetClassInfo(ids[i], &type_tag, &class_status, NULL); 207 if (status != ERR_NONE) { 208 return status; 209 } 210 211 expandBufAdd1(pReply, type_tag); 212 expandBufAddRefTypeId(pReply, ids[i]); 213 expandBufAdd4BE(pReply, class_status); 214 } 215 216 return ERR_NONE; 217 } 218 219 /* 220 * Handle request for the thread IDs of all running threads. 221 * 222 * We exclude ourselves from the list, because we don't allow ourselves 223 * to be suspended, and that violates some JDWP expectations. 224 */ 225 static JdwpError VM_AllThreads(JdwpState*, Request&, ExpandBuf* pReply) 226 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 227 std::vector<ObjectId> thread_ids; 228 Dbg::GetThreads(nullptr /* all thread groups */, &thread_ids); 229 230 expandBufAdd4BE(pReply, thread_ids.size()); 231 for (uint32_t i = 0; i < thread_ids.size(); ++i) { 232 expandBufAddObjectId(pReply, thread_ids[i]); 233 } 234 235 return ERR_NONE; 236 } 237 238 /* 239 * List all thread groups that do not have a parent. 240 */ 241 static JdwpError VM_TopLevelThreadGroups(JdwpState*, Request&, ExpandBuf* pReply) 242 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 243 /* 244 * TODO: maintain a list of parentless thread groups in the VM. 245 * 246 * For now, just return "system". Application threads are created 247 * in "main", which is a child of "system". 248 */ 249 uint32_t groups = 1; 250 expandBufAdd4BE(pReply, groups); 251 ObjectId thread_group_id = Dbg::GetSystemThreadGroupId(); 252 expandBufAddObjectId(pReply, thread_group_id); 253 254 return ERR_NONE; 255 } 256 257 /* 258 * Respond with the sizes of the basic debugger types. 259 * 260 * All IDs are 8 bytes. 261 */ 262 static JdwpError VM_IDSizes(JdwpState*, Request&, ExpandBuf* pReply) 263 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 264 expandBufAdd4BE(pReply, sizeof(FieldId)); 265 expandBufAdd4BE(pReply, sizeof(MethodId)); 266 expandBufAdd4BE(pReply, sizeof(ObjectId)); 267 expandBufAdd4BE(pReply, sizeof(RefTypeId)); 268 expandBufAdd4BE(pReply, sizeof(FrameId)); 269 return ERR_NONE; 270 } 271 272 static JdwpError VM_Dispose(JdwpState*, Request&, ExpandBuf*) 273 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 274 Dbg::Disposed(); 275 return ERR_NONE; 276 } 277 278 /* 279 * Suspend the execution of the application running in the VM (i.e. suspend 280 * all threads). 281 * 282 * This needs to increment the "suspend count" on all threads. 283 */ 284 static JdwpError VM_Suspend(JdwpState*, Request&, ExpandBuf*) 285 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 286 Thread* self = Thread::Current(); 287 self->TransitionFromRunnableToSuspended(kWaitingForDebuggerSuspension); 288 Dbg::SuspendVM(); 289 self->TransitionFromSuspendedToRunnable(); 290 return ERR_NONE; 291 } 292 293 /* 294 * Resume execution. Decrements the "suspend count" of all threads. 295 */ 296 static JdwpError VM_Resume(JdwpState*, Request&, ExpandBuf*) 297 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 298 Dbg::ProcessDelayedFullUndeoptimizations(); 299 Dbg::ResumeVM(); 300 return ERR_NONE; 301 } 302 303 static JdwpError VM_Exit(JdwpState* state, Request& request, ExpandBuf*) 304 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 305 uint32_t exit_status = request.ReadUnsigned32("exit_status"); 306 state->ExitAfterReplying(exit_status); 307 return ERR_NONE; 308 } 309 310 /* 311 * Create a new string in the VM and return its ID. 312 * 313 * (Ctrl-Shift-I in Eclipse on an array of objects causes it to create the 314 * string "java.util.Arrays".) 315 */ 316 static JdwpError VM_CreateString(JdwpState*, Request& request, ExpandBuf* pReply) 317 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 318 std::string str(request.ReadUtf8String()); 319 ObjectId stringId = Dbg::CreateString(str); 320 if (stringId == 0) { 321 return ERR_OUT_OF_MEMORY; 322 } 323 expandBufAddObjectId(pReply, stringId); 324 return ERR_NONE; 325 } 326 327 static JdwpError VM_ClassPaths(JdwpState*, Request&, ExpandBuf* pReply) 328 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 329 expandBufAddUtf8String(pReply, "/"); 330 331 std::vector<std::string> class_path; 332 Split(Runtime::Current()->GetClassPathString(), ':', class_path); 333 expandBufAdd4BE(pReply, class_path.size()); 334 for (size_t i = 0; i < class_path.size(); ++i) { 335 expandBufAddUtf8String(pReply, class_path[i]); 336 } 337 338 std::vector<std::string> boot_class_path; 339 Split(Runtime::Current()->GetBootClassPathString(), ':', boot_class_path); 340 expandBufAdd4BE(pReply, boot_class_path.size()); 341 for (size_t i = 0; i < boot_class_path.size(); ++i) { 342 expandBufAddUtf8String(pReply, boot_class_path[i]); 343 } 344 345 return ERR_NONE; 346 } 347 348 static JdwpError VM_DisposeObjects(JdwpState*, Request& request, ExpandBuf*) 349 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 350 size_t object_count = request.ReadUnsigned32("object_count"); 351 for (size_t i = 0; i < object_count; ++i) { 352 ObjectId object_id = request.ReadObjectId(); 353 uint32_t reference_count = request.ReadUnsigned32("reference_count"); 354 Dbg::DisposeObject(object_id, reference_count); 355 } 356 return ERR_NONE; 357 } 358 359 static JdwpError VM_Capabilities(JdwpState*, Request&, ExpandBuf* reply) 360 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 361 expandBufAdd1(reply, true); // canWatchFieldModification 362 expandBufAdd1(reply, true); // canWatchFieldAccess 363 expandBufAdd1(reply, true); // canGetBytecodes 364 expandBufAdd1(reply, true); // canGetSyntheticAttribute 365 expandBufAdd1(reply, true); // canGetOwnedMonitorInfo 366 expandBufAdd1(reply, true); // canGetCurrentContendedMonitor 367 expandBufAdd1(reply, true); // canGetMonitorInfo 368 return ERR_NONE; 369 } 370 371 static JdwpError VM_CapabilitiesNew(JdwpState*, Request& request, ExpandBuf* reply) 372 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 373 // The first few capabilities are the same as those reported by the older call. 374 VM_Capabilities(NULL, request, reply); 375 376 expandBufAdd1(reply, false); // canRedefineClasses 377 expandBufAdd1(reply, false); // canAddMethod 378 expandBufAdd1(reply, false); // canUnrestrictedlyRedefineClasses 379 expandBufAdd1(reply, false); // canPopFrames 380 expandBufAdd1(reply, true); // canUseInstanceFilters 381 expandBufAdd1(reply, false); // canGetSourceDebugExtension 382 expandBufAdd1(reply, false); // canRequestVMDeathEvent 383 expandBufAdd1(reply, false); // canSetDefaultStratum 384 expandBufAdd1(reply, true); // 1.6: canGetInstanceInfo 385 expandBufAdd1(reply, false); // 1.6: canRequestMonitorEvents 386 expandBufAdd1(reply, true); // 1.6: canGetMonitorFrameInfo 387 expandBufAdd1(reply, false); // 1.6: canUseSourceNameFilters 388 expandBufAdd1(reply, false); // 1.6: canGetConstantPool 389 expandBufAdd1(reply, false); // 1.6: canForceEarlyReturn 390 391 // Fill in reserved22 through reserved32; note count started at 1. 392 for (size_t i = 22; i <= 32; ++i) { 393 expandBufAdd1(reply, false); 394 } 395 return ERR_NONE; 396 } 397 398 static JdwpError VM_AllClassesImpl(ExpandBuf* pReply, bool descriptor_and_status, bool generic) 399 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 400 std::vector<JDWP::RefTypeId> classes; 401 Dbg::GetClassList(classes); 402 403 expandBufAdd4BE(pReply, classes.size()); 404 405 for (size_t i = 0; i < classes.size(); ++i) { 406 static const char genericSignature[1] = ""; 407 JDWP::JdwpTypeTag type_tag; 408 std::string descriptor; 409 uint32_t class_status; 410 JDWP::JdwpError status = Dbg::GetClassInfo(classes[i], &type_tag, &class_status, &descriptor); 411 if (status != ERR_NONE) { 412 return status; 413 } 414 415 expandBufAdd1(pReply, type_tag); 416 expandBufAddRefTypeId(pReply, classes[i]); 417 if (descriptor_and_status) { 418 expandBufAddUtf8String(pReply, descriptor); 419 if (generic) { 420 expandBufAddUtf8String(pReply, genericSignature); 421 } 422 expandBufAdd4BE(pReply, class_status); 423 } 424 } 425 426 return ERR_NONE; 427 } 428 429 static JdwpError VM_AllClasses(JdwpState*, Request&, ExpandBuf* pReply) 430 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 431 return VM_AllClassesImpl(pReply, true, false); 432 } 433 434 static JdwpError VM_AllClassesWithGeneric(JdwpState*, Request&, ExpandBuf* pReply) 435 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 436 return VM_AllClassesImpl(pReply, true, true); 437 } 438 439 static JdwpError VM_InstanceCounts(JdwpState*, Request& request, ExpandBuf* pReply) 440 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 441 int32_t class_count = request.ReadSigned32("class count"); 442 if (class_count < 0) { 443 return ERR_ILLEGAL_ARGUMENT; 444 } 445 std::vector<RefTypeId> class_ids; 446 for (int32_t i = 0; i < class_count; ++i) { 447 class_ids.push_back(request.ReadRefTypeId()); 448 } 449 450 std::vector<uint64_t> counts; 451 JdwpError rc = Dbg::GetInstanceCounts(class_ids, counts); 452 if (rc != ERR_NONE) { 453 return rc; 454 } 455 456 expandBufAdd4BE(pReply, counts.size()); 457 for (size_t i = 0; i < counts.size(); ++i) { 458 expandBufAdd8BE(pReply, counts[i]); 459 } 460 return ERR_NONE; 461 } 462 463 static JdwpError RT_Modifiers(JdwpState*, Request& request, ExpandBuf* pReply) 464 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 465 RefTypeId refTypeId = request.ReadRefTypeId(); 466 return Dbg::GetModifiers(refTypeId, pReply); 467 } 468 469 /* 470 * Get values from static fields in a reference type. 471 */ 472 static JdwpError RT_GetValues(JdwpState*, Request& request, ExpandBuf* pReply) 473 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 474 RefTypeId refTypeId = request.ReadRefTypeId(); 475 int32_t field_count = request.ReadSigned32("field count"); 476 expandBufAdd4BE(pReply, field_count); 477 for (int32_t i = 0; i < field_count; ++i) { 478 FieldId fieldId = request.ReadFieldId(); 479 JdwpError status = Dbg::GetStaticFieldValue(refTypeId, fieldId, pReply); 480 if (status != ERR_NONE) { 481 return status; 482 } 483 } 484 return ERR_NONE; 485 } 486 487 /* 488 * Get the name of the source file in which a reference type was declared. 489 */ 490 static JdwpError RT_SourceFile(JdwpState*, Request& request, ExpandBuf* pReply) 491 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 492 RefTypeId refTypeId = request.ReadRefTypeId(); 493 std::string source_file; 494 JdwpError status = Dbg::GetSourceFile(refTypeId, source_file); 495 if (status != ERR_NONE) { 496 return status; 497 } 498 expandBufAddUtf8String(pReply, source_file); 499 return ERR_NONE; 500 } 501 502 /* 503 * Return the current status of the reference type. 504 */ 505 static JdwpError RT_Status(JdwpState*, Request& request, ExpandBuf* pReply) 506 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 507 RefTypeId refTypeId = request.ReadRefTypeId(); 508 JDWP::JdwpTypeTag type_tag; 509 uint32_t class_status; 510 JDWP::JdwpError status = Dbg::GetClassInfo(refTypeId, &type_tag, &class_status, NULL); 511 if (status != ERR_NONE) { 512 return status; 513 } 514 expandBufAdd4BE(pReply, class_status); 515 return ERR_NONE; 516 } 517 518 /* 519 * Return interfaces implemented directly by this class. 520 */ 521 static JdwpError RT_Interfaces(JdwpState*, Request& request, ExpandBuf* pReply) 522 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 523 RefTypeId refTypeId = request.ReadRefTypeId(); 524 return Dbg::OutputDeclaredInterfaces(refTypeId, pReply); 525 } 526 527 /* 528 * Return the class object corresponding to this type. 529 */ 530 static JdwpError RT_ClassObject(JdwpState*, Request& request, ExpandBuf* pReply) 531 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 532 RefTypeId refTypeId = request.ReadRefTypeId(); 533 ObjectId class_object_id; 534 JdwpError status = Dbg::GetClassObject(refTypeId, class_object_id); 535 if (status != ERR_NONE) { 536 return status; 537 } 538 VLOG(jdwp) << StringPrintf(" --> ObjectId %#" PRIx64, class_object_id); 539 expandBufAddObjectId(pReply, class_object_id); 540 return ERR_NONE; 541 } 542 543 /* 544 * Returns the value of the SourceDebugExtension attribute. 545 * 546 * JDB seems interested, but DEX files don't currently support this. 547 */ 548 static JdwpError RT_SourceDebugExtension(JdwpState*, Request&, ExpandBuf*) 549 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 550 /* referenceTypeId in, string out */ 551 return ERR_ABSENT_INFORMATION; 552 } 553 554 static JdwpError RT_Signature(JdwpState*, Request& request, ExpandBuf* pReply, bool with_generic) 555 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 556 RefTypeId refTypeId = request.ReadRefTypeId(); 557 558 std::string signature; 559 JdwpError status = Dbg::GetSignature(refTypeId, &signature); 560 if (status != ERR_NONE) { 561 return status; 562 } 563 expandBufAddUtf8String(pReply, signature); 564 if (with_generic) { 565 expandBufAddUtf8String(pReply, ""); 566 } 567 return ERR_NONE; 568 } 569 570 static JdwpError RT_Signature(JdwpState* state, Request& request, ExpandBuf* pReply) 571 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 572 return RT_Signature(state, request, pReply, false); 573 } 574 575 static JdwpError RT_SignatureWithGeneric(JdwpState* state, Request& request, ExpandBuf* pReply) 576 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 577 return RT_Signature(state, request, pReply, true); 578 } 579 580 /* 581 * Return the instance of java.lang.ClassLoader that loaded the specified 582 * reference type, or null if it was loaded by the system loader. 583 */ 584 static JdwpError RT_ClassLoader(JdwpState*, Request& request, ExpandBuf* pReply) 585 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 586 RefTypeId refTypeId = request.ReadRefTypeId(); 587 return Dbg::GetClassLoader(refTypeId, pReply); 588 } 589 590 /* 591 * Given a referenceTypeId, return a block of stuff that describes the 592 * fields declared by a class. 593 */ 594 static JdwpError RT_FieldsWithGeneric(JdwpState*, Request& request, ExpandBuf* pReply) 595 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 596 RefTypeId refTypeId = request.ReadRefTypeId(); 597 return Dbg::OutputDeclaredFields(refTypeId, true, pReply); 598 } 599 600 // Obsolete equivalent of FieldsWithGeneric, without the generic type information. 601 static JdwpError RT_Fields(JdwpState*, Request& request, ExpandBuf* pReply) 602 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 603 RefTypeId refTypeId = request.ReadRefTypeId(); 604 return Dbg::OutputDeclaredFields(refTypeId, false, pReply); 605 } 606 607 /* 608 * Given a referenceTypeID, return a block of goodies describing the 609 * methods declared by a class. 610 */ 611 static JdwpError RT_MethodsWithGeneric(JdwpState*, Request& request, ExpandBuf* pReply) 612 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 613 RefTypeId refTypeId = request.ReadRefTypeId(); 614 return Dbg::OutputDeclaredMethods(refTypeId, true, pReply); 615 } 616 617 // Obsolete equivalent of MethodsWithGeneric, without the generic type information. 618 static JdwpError RT_Methods(JdwpState*, Request& request, ExpandBuf* pReply) 619 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 620 RefTypeId refTypeId = request.ReadRefTypeId(); 621 return Dbg::OutputDeclaredMethods(refTypeId, false, pReply); 622 } 623 624 static JdwpError RT_Instances(JdwpState*, Request& request, ExpandBuf* reply) 625 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 626 RefTypeId class_id = request.ReadRefTypeId(); 627 int32_t max_count = request.ReadSigned32("max count"); 628 if (max_count < 0) { 629 return ERR_ILLEGAL_ARGUMENT; 630 } 631 632 std::vector<ObjectId> instances; 633 JdwpError rc = Dbg::GetInstances(class_id, max_count, instances); 634 if (rc != ERR_NONE) { 635 return rc; 636 } 637 638 return WriteTaggedObjectList(reply, instances); 639 } 640 641 /* 642 * Return the immediate superclass of a class. 643 */ 644 static JdwpError CT_Superclass(JdwpState*, Request& request, ExpandBuf* pReply) 645 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 646 RefTypeId class_id = request.ReadRefTypeId(); 647 RefTypeId superClassId; 648 JdwpError status = Dbg::GetSuperclass(class_id, superClassId); 649 if (status != ERR_NONE) { 650 return status; 651 } 652 expandBufAddRefTypeId(pReply, superClassId); 653 return ERR_NONE; 654 } 655 656 /* 657 * Set static class values. 658 */ 659 static JdwpError CT_SetValues(JdwpState* , Request& request, ExpandBuf*) 660 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 661 RefTypeId class_id = request.ReadRefTypeId(); 662 int32_t values_count = request.ReadSigned32("values count"); 663 664 UNUSED(class_id); 665 666 for (int32_t i = 0; i < values_count; ++i) { 667 FieldId fieldId = request.ReadFieldId(); 668 JDWP::JdwpTag fieldTag = Dbg::GetStaticFieldBasicTag(fieldId); 669 size_t width = Dbg::GetTagWidth(fieldTag); 670 uint64_t value = request.ReadValue(width); 671 672 VLOG(jdwp) << " --> field=" << fieldId << " tag=" << fieldTag << " --> " << value; 673 JdwpError status = Dbg::SetStaticFieldValue(fieldId, value, width); 674 if (status != ERR_NONE) { 675 return status; 676 } 677 } 678 679 return ERR_NONE; 680 } 681 682 /* 683 * Invoke a static method. 684 * 685 * Example: Eclipse sometimes uses java/lang/Class.forName(String s) on 686 * values in the "variables" display. 687 */ 688 static JdwpError CT_InvokeMethod(JdwpState* state, Request& request, ExpandBuf* pReply) 689 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 690 RefTypeId class_id = request.ReadRefTypeId(); 691 ObjectId thread_id = request.ReadThreadId(); 692 MethodId method_id = request.ReadMethodId(); 693 694 return FinishInvoke(state, request, pReply, thread_id, 0, class_id, method_id, false); 695 } 696 697 /* 698 * Create a new object of the requested type, and invoke the specified 699 * constructor. 700 * 701 * Example: in IntelliJ, create a watch on "new String(myByteArray)" to 702 * see the contents of a byte[] as a string. 703 */ 704 static JdwpError CT_NewInstance(JdwpState* state, Request& request, ExpandBuf* pReply) 705 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 706 RefTypeId class_id = request.ReadRefTypeId(); 707 ObjectId thread_id = request.ReadThreadId(); 708 MethodId method_id = request.ReadMethodId(); 709 710 ObjectId object_id; 711 JdwpError status = Dbg::CreateObject(class_id, object_id); 712 if (status != ERR_NONE) { 713 return status; 714 } 715 if (object_id == 0) { 716 return ERR_OUT_OF_MEMORY; 717 } 718 return FinishInvoke(state, request, pReply, thread_id, object_id, class_id, method_id, true); 719 } 720 721 /* 722 * Create a new array object of the requested type and length. 723 */ 724 static JdwpError AT_newInstance(JdwpState*, Request& request, ExpandBuf* pReply) 725 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 726 RefTypeId arrayTypeId = request.ReadRefTypeId(); 727 int32_t length = request.ReadSigned32("length"); 728 729 ObjectId object_id; 730 JdwpError status = Dbg::CreateArrayObject(arrayTypeId, length, object_id); 731 if (status != ERR_NONE) { 732 return status; 733 } 734 if (object_id == 0) { 735 return ERR_OUT_OF_MEMORY; 736 } 737 expandBufAdd1(pReply, JT_ARRAY); 738 expandBufAddObjectId(pReply, object_id); 739 return ERR_NONE; 740 } 741 742 /* 743 * Return line number information for the method, if present. 744 */ 745 static JdwpError M_LineTable(JdwpState*, Request& request, ExpandBuf* pReply) 746 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 747 RefTypeId refTypeId = request.ReadRefTypeId(); 748 MethodId method_id = request.ReadMethodId(); 749 750 Dbg::OutputLineTable(refTypeId, method_id, pReply); 751 752 return ERR_NONE; 753 } 754 755 static JdwpError M_VariableTable(JdwpState*, Request& request, ExpandBuf* pReply, 756 bool generic) 757 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 758 RefTypeId class_id = request.ReadRefTypeId(); 759 MethodId method_id = request.ReadMethodId(); 760 761 // We could return ERR_ABSENT_INFORMATION here if the DEX file was built without local variable 762 // information. That will cause Eclipse to make a best-effort attempt at displaying local 763 // variables anonymously. However, the attempt isn't very good, so we're probably better off just 764 // not showing anything. 765 Dbg::OutputVariableTable(class_id, method_id, generic, pReply); 766 return ERR_NONE; 767 } 768 769 static JdwpError M_VariableTable(JdwpState* state, Request& request, ExpandBuf* pReply) 770 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 771 return M_VariableTable(state, request, pReply, false); 772 } 773 774 static JdwpError M_VariableTableWithGeneric(JdwpState* state, Request& request, ExpandBuf* pReply) 775 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 776 return M_VariableTable(state, request, pReply, true); 777 } 778 779 static JdwpError M_Bytecodes(JdwpState*, Request& request, ExpandBuf* reply) 780 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 781 RefTypeId class_id = request.ReadRefTypeId(); 782 MethodId method_id = request.ReadMethodId(); 783 784 std::vector<uint8_t> bytecodes; 785 JdwpError rc = Dbg::GetBytecodes(class_id, method_id, bytecodes); 786 if (rc != ERR_NONE) { 787 return rc; 788 } 789 790 expandBufAdd4BE(reply, bytecodes.size()); 791 for (size_t i = 0; i < bytecodes.size(); ++i) { 792 expandBufAdd1(reply, bytecodes[i]); 793 } 794 795 return ERR_NONE; 796 } 797 798 /* 799 * Given an object reference, return the runtime type of the object 800 * (class or array). 801 * 802 * This can get called on different things, e.g. thread_id gets 803 * passed in here. 804 */ 805 static JdwpError OR_ReferenceType(JdwpState*, Request& request, ExpandBuf* pReply) 806 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 807 ObjectId object_id = request.ReadObjectId(); 808 return Dbg::GetReferenceType(object_id, pReply); 809 } 810 811 /* 812 * Get values from the fields of an object. 813 */ 814 static JdwpError OR_GetValues(JdwpState*, Request& request, ExpandBuf* pReply) 815 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 816 ObjectId object_id = request.ReadObjectId(); 817 int32_t field_count = request.ReadSigned32("field count"); 818 819 expandBufAdd4BE(pReply, field_count); 820 for (int32_t i = 0; i < field_count; ++i) { 821 FieldId fieldId = request.ReadFieldId(); 822 JdwpError status = Dbg::GetFieldValue(object_id, fieldId, pReply); 823 if (status != ERR_NONE) { 824 return status; 825 } 826 } 827 828 return ERR_NONE; 829 } 830 831 /* 832 * Set values in the fields of an object. 833 */ 834 static JdwpError OR_SetValues(JdwpState*, Request& request, ExpandBuf*) 835 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 836 ObjectId object_id = request.ReadObjectId(); 837 int32_t field_count = request.ReadSigned32("field count"); 838 839 for (int32_t i = 0; i < field_count; ++i) { 840 FieldId fieldId = request.ReadFieldId(); 841 842 JDWP::JdwpTag fieldTag = Dbg::GetFieldBasicTag(fieldId); 843 size_t width = Dbg::GetTagWidth(fieldTag); 844 uint64_t value = request.ReadValue(width); 845 846 VLOG(jdwp) << " --> fieldId=" << fieldId << " tag=" << fieldTag << "(" << width << ") value=" << value; 847 JdwpError status = Dbg::SetFieldValue(object_id, fieldId, value, width); 848 if (status != ERR_NONE) { 849 return status; 850 } 851 } 852 853 return ERR_NONE; 854 } 855 856 static JdwpError OR_MonitorInfo(JdwpState*, Request& request, ExpandBuf* reply) 857 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 858 ObjectId object_id = request.ReadObjectId(); 859 return Dbg::GetMonitorInfo(object_id, reply); 860 } 861 862 /* 863 * Invoke an instance method. The invocation must occur in the specified 864 * thread, which must have been suspended by an event. 865 * 866 * The call is synchronous. All threads in the VM are resumed, unless the 867 * SINGLE_THREADED flag is set. 868 * 869 * If you ask Eclipse to "inspect" an object (or ask JDB to "print" an 870 * object), it will try to invoke the object's toString() function. This 871 * feature becomes crucial when examining ArrayLists with Eclipse. 872 */ 873 static JdwpError OR_InvokeMethod(JdwpState* state, Request& request, ExpandBuf* pReply) 874 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 875 ObjectId object_id = request.ReadObjectId(); 876 ObjectId thread_id = request.ReadThreadId(); 877 RefTypeId class_id = request.ReadRefTypeId(); 878 MethodId method_id = request.ReadMethodId(); 879 880 return FinishInvoke(state, request, pReply, thread_id, object_id, class_id, method_id, false); 881 } 882 883 static JdwpError OR_DisableCollection(JdwpState*, Request& request, ExpandBuf*) 884 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 885 ObjectId object_id = request.ReadObjectId(); 886 return Dbg::DisableCollection(object_id); 887 } 888 889 static JdwpError OR_EnableCollection(JdwpState*, Request& request, ExpandBuf*) 890 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 891 ObjectId object_id = request.ReadObjectId(); 892 return Dbg::EnableCollection(object_id); 893 } 894 895 static JdwpError OR_IsCollected(JdwpState*, Request& request, ExpandBuf* pReply) 896 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 897 ObjectId object_id = request.ReadObjectId(); 898 bool is_collected; 899 JdwpError rc = Dbg::IsCollected(object_id, is_collected); 900 expandBufAdd1(pReply, is_collected ? 1 : 0); 901 return rc; 902 } 903 904 static JdwpError OR_ReferringObjects(JdwpState*, Request& request, ExpandBuf* reply) 905 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 906 ObjectId object_id = request.ReadObjectId(); 907 int32_t max_count = request.ReadSigned32("max count"); 908 if (max_count < 0) { 909 return ERR_ILLEGAL_ARGUMENT; 910 } 911 912 std::vector<ObjectId> referring_objects; 913 JdwpError rc = Dbg::GetReferringObjects(object_id, max_count, referring_objects); 914 if (rc != ERR_NONE) { 915 return rc; 916 } 917 918 return WriteTaggedObjectList(reply, referring_objects); 919 } 920 921 /* 922 * Return the string value in a string object. 923 */ 924 static JdwpError SR_Value(JdwpState*, Request& request, ExpandBuf* pReply) 925 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 926 ObjectId stringObject = request.ReadObjectId(); 927 std::string str; 928 JDWP::JdwpError error = Dbg::StringToUtf8(stringObject, &str); 929 if (error != JDWP::ERR_NONE) { 930 return error; 931 } 932 933 VLOG(jdwp) << StringPrintf(" --> %s", PrintableString(str.c_str()).c_str()); 934 935 expandBufAddUtf8String(pReply, str); 936 937 return ERR_NONE; 938 } 939 940 /* 941 * Return a thread's name. 942 */ 943 static JdwpError TR_Name(JdwpState*, Request& request, ExpandBuf* pReply) 944 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 945 ObjectId thread_id = request.ReadThreadId(); 946 947 std::string name; 948 JdwpError error = Dbg::GetThreadName(thread_id, name); 949 if (error != ERR_NONE) { 950 return error; 951 } 952 VLOG(jdwp) << StringPrintf(" Name of thread %#" PRIx64 " is \"%s\"", thread_id, name.c_str()); 953 expandBufAddUtf8String(pReply, name); 954 955 return ERR_NONE; 956 } 957 958 /* 959 * Suspend the specified thread. 960 * 961 * It's supposed to remain suspended even if interpreted code wants to 962 * resume it; only the JDI is allowed to resume it. 963 */ 964 static JdwpError TR_Suspend(JdwpState*, Request& request, ExpandBuf*) 965 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 966 ObjectId thread_id = request.ReadThreadId(); 967 968 if (thread_id == Dbg::GetThreadSelfId()) { 969 LOG(INFO) << " Warning: ignoring request to suspend self"; 970 return ERR_THREAD_NOT_SUSPENDED; 971 } 972 973 Thread* self = Thread::Current(); 974 self->TransitionFromRunnableToSuspended(kWaitingForDebuggerSend); 975 JdwpError result = Dbg::SuspendThread(thread_id); 976 self->TransitionFromSuspendedToRunnable(); 977 return result; 978 } 979 980 /* 981 * Resume the specified thread. 982 */ 983 static JdwpError TR_Resume(JdwpState*, Request& request, ExpandBuf*) 984 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 985 ObjectId thread_id = request.ReadThreadId(); 986 987 if (thread_id == Dbg::GetThreadSelfId()) { 988 LOG(INFO) << " Warning: ignoring request to resume self"; 989 return ERR_NONE; 990 } 991 992 Dbg::ProcessDelayedFullUndeoptimizations(); 993 994 Dbg::ResumeThread(thread_id); 995 return ERR_NONE; 996 } 997 998 /* 999 * Return status of specified thread. 1000 */ 1001 static JdwpError TR_Status(JdwpState*, Request& request, ExpandBuf* pReply) 1002 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1003 ObjectId thread_id = request.ReadThreadId(); 1004 1005 JDWP::JdwpThreadStatus threadStatus; 1006 JDWP::JdwpSuspendStatus suspendStatus; 1007 JdwpError error = Dbg::GetThreadStatus(thread_id, &threadStatus, &suspendStatus); 1008 if (error != ERR_NONE) { 1009 return error; 1010 } 1011 1012 VLOG(jdwp) << " --> " << threadStatus << ", " << suspendStatus; 1013 1014 expandBufAdd4BE(pReply, threadStatus); 1015 expandBufAdd4BE(pReply, suspendStatus); 1016 1017 return ERR_NONE; 1018 } 1019 1020 /* 1021 * Return the thread group that the specified thread is a member of. 1022 */ 1023 static JdwpError TR_ThreadGroup(JdwpState*, Request& request, ExpandBuf* pReply) 1024 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1025 ObjectId thread_id = request.ReadThreadId(); 1026 return Dbg::GetThreadGroup(thread_id, pReply); 1027 } 1028 1029 /* 1030 * Return the current call stack of a suspended thread. 1031 * 1032 * If the thread isn't suspended, the error code isn't defined, but should 1033 * be THREAD_NOT_SUSPENDED. 1034 */ 1035 static JdwpError TR_Frames(JdwpState*, Request& request, ExpandBuf* pReply) 1036 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1037 ObjectId thread_id = request.ReadThreadId(); 1038 uint32_t start_frame = request.ReadUnsigned32("start frame"); 1039 uint32_t length = request.ReadUnsigned32("length"); 1040 1041 size_t actual_frame_count; 1042 JdwpError error = Dbg::GetThreadFrameCount(thread_id, actual_frame_count); 1043 if (error != ERR_NONE) { 1044 return error; 1045 } 1046 1047 if (actual_frame_count <= 0) { 1048 return ERR_THREAD_NOT_SUSPENDED; // 0 means no managed frames (which means "in native"). 1049 } 1050 1051 if (start_frame > actual_frame_count) { 1052 return ERR_INVALID_INDEX; 1053 } 1054 if (length == static_cast<uint32_t>(-1)) { 1055 length = actual_frame_count - start_frame; 1056 } 1057 if (start_frame + length > actual_frame_count) { 1058 return ERR_INVALID_LENGTH; 1059 } 1060 1061 return Dbg::GetThreadFrames(thread_id, start_frame, length, pReply); 1062 } 1063 1064 /* 1065 * Returns the #of frames on the specified thread, which must be suspended. 1066 */ 1067 static JdwpError TR_FrameCount(JdwpState*, Request& request, ExpandBuf* pReply) 1068 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1069 ObjectId thread_id = request.ReadThreadId(); 1070 1071 size_t frame_count; 1072 JdwpError rc = Dbg::GetThreadFrameCount(thread_id, frame_count); 1073 if (rc != ERR_NONE) { 1074 return rc; 1075 } 1076 expandBufAdd4BE(pReply, static_cast<uint32_t>(frame_count)); 1077 1078 return ERR_NONE; 1079 } 1080 1081 static JdwpError TR_OwnedMonitors(Request& request, ExpandBuf* reply, bool with_stack_depths) 1082 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1083 ObjectId thread_id = request.ReadThreadId(); 1084 1085 std::vector<ObjectId> monitors; 1086 std::vector<uint32_t> stack_depths; 1087 JdwpError rc = Dbg::GetOwnedMonitors(thread_id, monitors, stack_depths); 1088 if (rc != ERR_NONE) { 1089 return rc; 1090 } 1091 1092 expandBufAdd4BE(reply, monitors.size()); 1093 for (size_t i = 0; i < monitors.size(); ++i) { 1094 rc = WriteTaggedObject(reply, monitors[i]); 1095 if (rc != ERR_NONE) { 1096 return rc; 1097 } 1098 if (with_stack_depths) { 1099 expandBufAdd4BE(reply, stack_depths[i]); 1100 } 1101 } 1102 return ERR_NONE; 1103 } 1104 1105 static JdwpError TR_OwnedMonitors(JdwpState*, Request& request, ExpandBuf* reply) 1106 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1107 return TR_OwnedMonitors(request, reply, false); 1108 } 1109 1110 static JdwpError TR_OwnedMonitorsStackDepthInfo(JdwpState*, Request& request, ExpandBuf* reply) 1111 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1112 return TR_OwnedMonitors(request, reply, true); 1113 } 1114 1115 static JdwpError TR_CurrentContendedMonitor(JdwpState*, Request& request, ExpandBuf* reply) 1116 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1117 ObjectId thread_id = request.ReadThreadId(); 1118 1119 ObjectId contended_monitor; 1120 JdwpError rc = Dbg::GetContendedMonitor(thread_id, contended_monitor); 1121 if (rc != ERR_NONE) { 1122 return rc; 1123 } 1124 return WriteTaggedObject(reply, contended_monitor); 1125 } 1126 1127 static JdwpError TR_Interrupt(JdwpState*, Request& request, ExpandBuf* reply) 1128 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1129 ObjectId thread_id = request.ReadThreadId(); 1130 return Dbg::Interrupt(thread_id); 1131 } 1132 1133 /* 1134 * Return the debug suspend count for the specified thread. 1135 * 1136 * (The thread *might* still be running -- it might not have examined 1137 * its suspend count recently.) 1138 */ 1139 static JdwpError TR_DebugSuspendCount(JdwpState*, Request& request, ExpandBuf* pReply) 1140 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1141 ObjectId thread_id = request.ReadThreadId(); 1142 return Dbg::GetThreadDebugSuspendCount(thread_id, pReply); 1143 } 1144 1145 /* 1146 * Return the name of a thread group. 1147 * 1148 * The Eclipse debugger recognizes "main" and "system" as special. 1149 */ 1150 static JdwpError TGR_Name(JdwpState*, Request& request, ExpandBuf* pReply) 1151 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1152 ObjectId thread_group_id = request.ReadThreadGroupId(); 1153 return Dbg::GetThreadGroupName(thread_group_id, pReply); 1154 } 1155 1156 /* 1157 * Returns the thread group -- if any -- that contains the specified 1158 * thread group. 1159 */ 1160 static JdwpError TGR_Parent(JdwpState*, Request& request, ExpandBuf* pReply) 1161 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1162 ObjectId thread_group_id = request.ReadThreadGroupId(); 1163 return Dbg::GetThreadGroupParent(thread_group_id, pReply); 1164 } 1165 1166 /* 1167 * Return the active threads and thread groups that are part of the 1168 * specified thread group. 1169 */ 1170 static JdwpError TGR_Children(JdwpState*, Request& request, ExpandBuf* pReply) 1171 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1172 ObjectId thread_group_id = request.ReadThreadGroupId(); 1173 return Dbg::GetThreadGroupChildren(thread_group_id, pReply); 1174 } 1175 1176 /* 1177 * Return the #of components in the array. 1178 */ 1179 static JdwpError AR_Length(JdwpState*, Request& request, ExpandBuf* pReply) 1180 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1181 ObjectId array_id = request.ReadArrayId(); 1182 1183 int length; 1184 JdwpError status = Dbg::GetArrayLength(array_id, length); 1185 if (status != ERR_NONE) { 1186 return status; 1187 } 1188 VLOG(jdwp) << " --> " << length; 1189 1190 expandBufAdd4BE(pReply, length); 1191 1192 return ERR_NONE; 1193 } 1194 1195 /* 1196 * Return the values from an array. 1197 */ 1198 static JdwpError AR_GetValues(JdwpState*, Request& request, ExpandBuf* pReply) 1199 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1200 ObjectId array_id = request.ReadArrayId(); 1201 uint32_t offset = request.ReadUnsigned32("offset"); 1202 uint32_t length = request.ReadUnsigned32("length"); 1203 return Dbg::OutputArray(array_id, offset, length, pReply); 1204 } 1205 1206 /* 1207 * Set values in an array. 1208 */ 1209 static JdwpError AR_SetValues(JdwpState*, Request& request, ExpandBuf*) 1210 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1211 ObjectId array_id = request.ReadArrayId(); 1212 uint32_t offset = request.ReadUnsigned32("offset"); 1213 uint32_t count = request.ReadUnsigned32("count"); 1214 return Dbg::SetArrayElements(array_id, offset, count, request); 1215 } 1216 1217 static JdwpError CLR_VisibleClasses(JdwpState*, Request& request, ExpandBuf* pReply) 1218 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1219 request.ReadObjectId(); // classLoaderObject 1220 // TODO: we should only return classes which have the given class loader as a defining or 1221 // initiating loader. The former would be easy; the latter is hard, because we don't have 1222 // any such notion. 1223 return VM_AllClassesImpl(pReply, false, false); 1224 } 1225 1226 /* 1227 * Set an event trigger. 1228 * 1229 * Reply with a requestID. 1230 */ 1231 static JdwpError ER_Set(JdwpState* state, Request& request, ExpandBuf* pReply) 1232 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1233 JdwpEventKind event_kind = request.ReadEnum1<JdwpEventKind>("event kind"); 1234 JdwpSuspendPolicy suspend_policy = request.ReadEnum1<JdwpSuspendPolicy>("suspend policy"); 1235 int32_t modifier_count = request.ReadSigned32("modifier count"); 1236 1237 CHECK_LT(modifier_count, 256); /* reasonableness check */ 1238 1239 JdwpEvent* pEvent = EventAlloc(modifier_count); 1240 pEvent->eventKind = event_kind; 1241 pEvent->suspend_policy = suspend_policy; 1242 pEvent->modCount = modifier_count; 1243 1244 /* 1245 * Read modifiers. Ordering may be significant (see explanation of Count 1246 * mods in JDWP doc). 1247 */ 1248 for (int32_t i = 0; i < modifier_count; ++i) { 1249 JdwpEventMod& mod = pEvent->mods[i]; 1250 mod.modKind = request.ReadModKind(); 1251 switch (mod.modKind) { 1252 case MK_COUNT: 1253 { 1254 // Report once, when "--count" reaches 0. 1255 uint32_t count = request.ReadUnsigned32("count"); 1256 if (count == 0) { 1257 return ERR_INVALID_COUNT; 1258 } 1259 mod.count.count = count; 1260 } 1261 break; 1262 case MK_CONDITIONAL: 1263 { 1264 // Conditional on expression. 1265 uint32_t exprId = request.ReadUnsigned32("expr id"); 1266 mod.conditional.exprId = exprId; 1267 } 1268 break; 1269 case MK_THREAD_ONLY: 1270 { 1271 // Only report events in specified thread. 1272 ObjectId thread_id = request.ReadThreadId(); 1273 mod.threadOnly.threadId = thread_id; 1274 } 1275 break; 1276 case MK_CLASS_ONLY: 1277 { 1278 // For ClassPrepare, MethodEntry. 1279 RefTypeId class_id = request.ReadRefTypeId(); 1280 mod.classOnly.refTypeId = class_id; 1281 } 1282 break; 1283 case MK_CLASS_MATCH: 1284 { 1285 // Restrict events to matching classes. 1286 // pattern is "java.foo.*", we want "java/foo/*". 1287 std::string pattern(request.ReadUtf8String()); 1288 std::replace(pattern.begin(), pattern.end(), '.', '/'); 1289 mod.classMatch.classPattern = strdup(pattern.c_str()); 1290 } 1291 break; 1292 case MK_CLASS_EXCLUDE: 1293 { 1294 // Restrict events to non-matching classes. 1295 // pattern is "java.foo.*", we want "java/foo/*". 1296 std::string pattern(request.ReadUtf8String()); 1297 std::replace(pattern.begin(), pattern.end(), '.', '/'); 1298 mod.classExclude.classPattern = strdup(pattern.c_str()); 1299 } 1300 break; 1301 case MK_LOCATION_ONLY: 1302 { 1303 // Restrict certain events based on location. 1304 JdwpLocation location = request.ReadLocation(); 1305 mod.locationOnly.loc = location; 1306 } 1307 break; 1308 case MK_EXCEPTION_ONLY: 1309 { 1310 // Modifies EK_EXCEPTION events, 1311 mod.exceptionOnly.refTypeId = request.ReadRefTypeId(); // null => all exceptions. 1312 mod.exceptionOnly.caught = request.ReadEnum1<uint8_t>("caught"); 1313 mod.exceptionOnly.uncaught = request.ReadEnum1<uint8_t>("uncaught"); 1314 } 1315 break; 1316 case MK_FIELD_ONLY: 1317 { 1318 // For field access/modification events. 1319 RefTypeId declaring = request.ReadRefTypeId(); 1320 FieldId fieldId = request.ReadFieldId(); 1321 mod.fieldOnly.refTypeId = declaring; 1322 mod.fieldOnly.fieldId = fieldId; 1323 } 1324 break; 1325 case MK_STEP: 1326 { 1327 // For use with EK_SINGLE_STEP. 1328 ObjectId thread_id = request.ReadThreadId(); 1329 uint32_t size = request.ReadUnsigned32("step size"); 1330 uint32_t depth = request.ReadUnsigned32("step depth"); 1331 VLOG(jdwp) << StringPrintf(" Step: thread=%#" PRIx64, thread_id) 1332 << " size=" << JdwpStepSize(size) << " depth=" << JdwpStepDepth(depth); 1333 1334 mod.step.threadId = thread_id; 1335 mod.step.size = size; 1336 mod.step.depth = depth; 1337 } 1338 break; 1339 case MK_INSTANCE_ONLY: 1340 { 1341 // Report events related to a specific object. 1342 ObjectId instance = request.ReadObjectId(); 1343 mod.instanceOnly.objectId = instance; 1344 } 1345 break; 1346 default: 1347 LOG(WARNING) << "Unsupported modifier " << mod.modKind << " for event " << pEvent->eventKind; 1348 // Free allocated event to avoid leak before leaving. 1349 EventFree(pEvent); 1350 return JDWP::ERR_NOT_IMPLEMENTED; 1351 } 1352 } 1353 1354 /* 1355 * We reply with an integer "requestID". 1356 */ 1357 uint32_t requestId = state->NextEventSerial(); 1358 expandBufAdd4BE(pReply, requestId); 1359 1360 pEvent->requestId = requestId; 1361 1362 VLOG(jdwp) << StringPrintf(" --> event requestId=%#x", requestId); 1363 1364 /* add it to the list */ 1365 JdwpError err = state->RegisterEvent(pEvent); 1366 if (err != ERR_NONE) { 1367 /* registration failed, probably because event is bogus */ 1368 EventFree(pEvent); 1369 LOG(WARNING) << "WARNING: event request rejected"; 1370 } 1371 return err; 1372 } 1373 1374 static JdwpError ER_Clear(JdwpState* state, Request& request, ExpandBuf*) 1375 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1376 request.ReadEnum1<JdwpEventKind>("event kind"); 1377 uint32_t requestId = request.ReadUnsigned32("request id"); 1378 1379 // Failure to find an event with a matching ID is a no-op 1380 // and does not return an error. 1381 state->UnregisterEventById(requestId); 1382 return ERR_NONE; 1383 } 1384 1385 /* 1386 * Return the values of arguments and local variables. 1387 */ 1388 static JdwpError SF_GetValues(JdwpState*, Request& request, ExpandBuf* pReply) 1389 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1390 return Dbg::GetLocalValues(&request, pReply); 1391 } 1392 1393 /* 1394 * Set the values of arguments and local variables. 1395 */ 1396 static JdwpError SF_SetValues(JdwpState*, Request& request, ExpandBuf*) 1397 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1398 return Dbg::SetLocalValues(&request); 1399 } 1400 1401 static JdwpError SF_ThisObject(JdwpState*, Request& request, ExpandBuf* reply) 1402 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1403 ObjectId thread_id = request.ReadThreadId(); 1404 FrameId frame_id = request.ReadFrameId(); 1405 1406 ObjectId object_id; 1407 JdwpError rc = Dbg::GetThisObject(thread_id, frame_id, &object_id); 1408 if (rc != ERR_NONE) { 1409 return rc; 1410 } 1411 1412 return WriteTaggedObject(reply, object_id); 1413 } 1414 1415 /* 1416 * Return the reference type reflected by this class object. 1417 * 1418 * This appears to be required because ReferenceTypeId values are NEVER 1419 * reused, whereas ClassIds can be recycled like any other object. (Either 1420 * that, or I have no idea what this is for.) 1421 */ 1422 static JdwpError COR_ReflectedType(JdwpState*, Request& request, ExpandBuf* pReply) 1423 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1424 RefTypeId class_object_id = request.ReadRefTypeId(); 1425 return Dbg::GetReflectedType(class_object_id, pReply); 1426 } 1427 1428 /* 1429 * Handle a DDM packet with a single chunk in it. 1430 */ 1431 static JdwpError DDM_Chunk(JdwpState* state, Request& request, ExpandBuf* pReply) 1432 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 1433 state->NotifyDdmsActive(); 1434 uint8_t* replyBuf = NULL; 1435 int replyLen = -1; 1436 if (Dbg::DdmHandlePacket(request, &replyBuf, &replyLen)) { 1437 // If they want to send something back, we copy it into the buffer. 1438 // TODO: consider altering the JDWP stuff to hold the packet header 1439 // in a separate buffer. That would allow us to writev() DDM traffic 1440 // instead of copying it into the expanding buffer. The reduction in 1441 // heap requirements is probably more valuable than the efficiency. 1442 CHECK_GT(replyLen, 0); 1443 memcpy(expandBufAddSpace(pReply, replyLen), replyBuf, replyLen); 1444 free(replyBuf); 1445 } 1446 return ERR_NONE; 1447 } 1448 1449 /* 1450 * Handler map decl. 1451 */ 1452 typedef JdwpError (*JdwpRequestHandler)(JdwpState* state, Request& request, ExpandBuf* reply); 1453 1454 struct JdwpHandlerMap { 1455 uint8_t cmdSet; 1456 uint8_t cmd; 1457 JdwpRequestHandler func; 1458 const char* name; 1459 }; 1460 1461 /* 1462 * Map commands to functions. 1463 * 1464 * Command sets 0-63 are incoming requests, 64-127 are outbound requests, 1465 * and 128-256 are vendor-defined. 1466 */ 1467 static const JdwpHandlerMap gHandlers[] = { 1468 /* VirtualMachine command set (1) */ 1469 { 1, 1, VM_Version, "VirtualMachine.Version" }, 1470 { 1, 2, VM_ClassesBySignature, "VirtualMachine.ClassesBySignature" }, 1471 { 1, 3, VM_AllClasses, "VirtualMachine.AllClasses" }, 1472 { 1, 4, VM_AllThreads, "VirtualMachine.AllThreads" }, 1473 { 1, 5, VM_TopLevelThreadGroups, "VirtualMachine.TopLevelThreadGroups" }, 1474 { 1, 6, VM_Dispose, "VirtualMachine.Dispose" }, 1475 { 1, 7, VM_IDSizes, "VirtualMachine.IDSizes" }, 1476 { 1, 8, VM_Suspend, "VirtualMachine.Suspend" }, 1477 { 1, 9, VM_Resume, "VirtualMachine.Resume" }, 1478 { 1, 10, VM_Exit, "VirtualMachine.Exit" }, 1479 { 1, 11, VM_CreateString, "VirtualMachine.CreateString" }, 1480 { 1, 12, VM_Capabilities, "VirtualMachine.Capabilities" }, 1481 { 1, 13, VM_ClassPaths, "VirtualMachine.ClassPaths" }, 1482 { 1, 14, VM_DisposeObjects, "VirtualMachine.DisposeObjects" }, 1483 { 1, 15, NULL, "VirtualMachine.HoldEvents" }, 1484 { 1, 16, NULL, "VirtualMachine.ReleaseEvents" }, 1485 { 1, 17, VM_CapabilitiesNew, "VirtualMachine.CapabilitiesNew" }, 1486 { 1, 18, NULL, "VirtualMachine.RedefineClasses" }, 1487 { 1, 19, NULL, "VirtualMachine.SetDefaultStratum" }, 1488 { 1, 20, VM_AllClassesWithGeneric, "VirtualMachine.AllClassesWithGeneric" }, 1489 { 1, 21, VM_InstanceCounts, "VirtualMachine.InstanceCounts" }, 1490 1491 /* ReferenceType command set (2) */ 1492 { 2, 1, RT_Signature, "ReferenceType.Signature" }, 1493 { 2, 2, RT_ClassLoader, "ReferenceType.ClassLoader" }, 1494 { 2, 3, RT_Modifiers, "ReferenceType.Modifiers" }, 1495 { 2, 4, RT_Fields, "ReferenceType.Fields" }, 1496 { 2, 5, RT_Methods, "ReferenceType.Methods" }, 1497 { 2, 6, RT_GetValues, "ReferenceType.GetValues" }, 1498 { 2, 7, RT_SourceFile, "ReferenceType.SourceFile" }, 1499 { 2, 8, NULL, "ReferenceType.NestedTypes" }, 1500 { 2, 9, RT_Status, "ReferenceType.Status" }, 1501 { 2, 10, RT_Interfaces, "ReferenceType.Interfaces" }, 1502 { 2, 11, RT_ClassObject, "ReferenceType.ClassObject" }, 1503 { 2, 12, RT_SourceDebugExtension, "ReferenceType.SourceDebugExtension" }, 1504 { 2, 13, RT_SignatureWithGeneric, "ReferenceType.SignatureWithGeneric" }, 1505 { 2, 14, RT_FieldsWithGeneric, "ReferenceType.FieldsWithGeneric" }, 1506 { 2, 15, RT_MethodsWithGeneric, "ReferenceType.MethodsWithGeneric" }, 1507 { 2, 16, RT_Instances, "ReferenceType.Instances" }, 1508 { 2, 17, NULL, "ReferenceType.ClassFileVersion" }, 1509 { 2, 18, NULL, "ReferenceType.ConstantPool" }, 1510 1511 /* ClassType command set (3) */ 1512 { 3, 1, CT_Superclass, "ClassType.Superclass" }, 1513 { 3, 2, CT_SetValues, "ClassType.SetValues" }, 1514 { 3, 3, CT_InvokeMethod, "ClassType.InvokeMethod" }, 1515 { 3, 4, CT_NewInstance, "ClassType.NewInstance" }, 1516 1517 /* ArrayType command set (4) */ 1518 { 4, 1, AT_newInstance, "ArrayType.NewInstance" }, 1519 1520 /* InterfaceType command set (5) */ 1521 1522 /* Method command set (6) */ 1523 { 6, 1, M_LineTable, "Method.LineTable" }, 1524 { 6, 2, M_VariableTable, "Method.VariableTable" }, 1525 { 6, 3, M_Bytecodes, "Method.Bytecodes" }, 1526 { 6, 4, NULL, "Method.IsObsolete" }, 1527 { 6, 5, M_VariableTableWithGeneric, "Method.VariableTableWithGeneric" }, 1528 1529 /* Field command set (8) */ 1530 1531 /* ObjectReference command set (9) */ 1532 { 9, 1, OR_ReferenceType, "ObjectReference.ReferenceType" }, 1533 { 9, 2, OR_GetValues, "ObjectReference.GetValues" }, 1534 { 9, 3, OR_SetValues, "ObjectReference.SetValues" }, 1535 { 9, 4, NULL, "ObjectReference.UNUSED" }, 1536 { 9, 5, OR_MonitorInfo, "ObjectReference.MonitorInfo" }, 1537 { 9, 6, OR_InvokeMethod, "ObjectReference.InvokeMethod" }, 1538 { 9, 7, OR_DisableCollection, "ObjectReference.DisableCollection" }, 1539 { 9, 8, OR_EnableCollection, "ObjectReference.EnableCollection" }, 1540 { 9, 9, OR_IsCollected, "ObjectReference.IsCollected" }, 1541 { 9, 10, OR_ReferringObjects, "ObjectReference.ReferringObjects" }, 1542 1543 /* StringReference command set (10) */ 1544 { 10, 1, SR_Value, "StringReference.Value" }, 1545 1546 /* ThreadReference command set (11) */ 1547 { 11, 1, TR_Name, "ThreadReference.Name" }, 1548 { 11, 2, TR_Suspend, "ThreadReference.Suspend" }, 1549 { 11, 3, TR_Resume, "ThreadReference.Resume" }, 1550 { 11, 4, TR_Status, "ThreadReference.Status" }, 1551 { 11, 5, TR_ThreadGroup, "ThreadReference.ThreadGroup" }, 1552 { 11, 6, TR_Frames, "ThreadReference.Frames" }, 1553 { 11, 7, TR_FrameCount, "ThreadReference.FrameCount" }, 1554 { 11, 8, TR_OwnedMonitors, "ThreadReference.OwnedMonitors" }, 1555 { 11, 9, TR_CurrentContendedMonitor, "ThreadReference.CurrentContendedMonitor" }, 1556 { 11, 10, NULL, "ThreadReference.Stop" }, 1557 { 11, 11, TR_Interrupt, "ThreadReference.Interrupt" }, 1558 { 11, 12, TR_DebugSuspendCount, "ThreadReference.SuspendCount" }, 1559 { 11, 13, TR_OwnedMonitorsStackDepthInfo, "ThreadReference.OwnedMonitorsStackDepthInfo" }, 1560 { 11, 14, NULL, "ThreadReference.ForceEarlyReturn" }, 1561 1562 /* ThreadGroupReference command set (12) */ 1563 { 12, 1, TGR_Name, "ThreadGroupReference.Name" }, 1564 { 12, 2, TGR_Parent, "ThreadGroupReference.Parent" }, 1565 { 12, 3, TGR_Children, "ThreadGroupReference.Children" }, 1566 1567 /* ArrayReference command set (13) */ 1568 { 13, 1, AR_Length, "ArrayReference.Length" }, 1569 { 13, 2, AR_GetValues, "ArrayReference.GetValues" }, 1570 { 13, 3, AR_SetValues, "ArrayReference.SetValues" }, 1571 1572 /* ClassLoaderReference command set (14) */ 1573 { 14, 1, CLR_VisibleClasses, "ClassLoaderReference.VisibleClasses" }, 1574 1575 /* EventRequest command set (15) */ 1576 { 15, 1, ER_Set, "EventRequest.Set" }, 1577 { 15, 2, ER_Clear, "EventRequest.Clear" }, 1578 { 15, 3, NULL, "EventRequest.ClearAllBreakpoints" }, 1579 1580 /* StackFrame command set (16) */ 1581 { 16, 1, SF_GetValues, "StackFrame.GetValues" }, 1582 { 16, 2, SF_SetValues, "StackFrame.SetValues" }, 1583 { 16, 3, SF_ThisObject, "StackFrame.ThisObject" }, 1584 { 16, 4, NULL, "StackFrame.PopFrames" }, 1585 1586 /* ClassObjectReference command set (17) */ 1587 { 17, 1, COR_ReflectedType, "ClassObjectReference.ReflectedType" }, 1588 1589 /* Event command set (64) */ 1590 { 64, 100, NULL, "Event.Composite" }, // sent from VM to debugger, never received by VM 1591 1592 { 199, 1, DDM_Chunk, "DDM.Chunk" }, 1593 }; 1594 1595 static const char* GetCommandName(Request& request) { 1596 for (size_t i = 0; i < arraysize(gHandlers); ++i) { 1597 if (gHandlers[i].cmdSet == request.GetCommandSet() && gHandlers[i].cmd == request.GetCommand()) { 1598 return gHandlers[i].name; 1599 } 1600 } 1601 return "?UNKNOWN?"; 1602 } 1603 1604 static std::string DescribeCommand(Request& request) { 1605 std::string result; 1606 result += "REQUEST: "; 1607 result += GetCommandName(request); 1608 result += StringPrintf(" (length=%zu id=0x%06x)", request.GetLength(), request.GetId()); 1609 return result; 1610 } 1611 1612 /* 1613 * Process a request from the debugger. 1614 * 1615 * On entry, the JDWP thread is in VMWAIT. 1616 */ 1617 size_t JdwpState::ProcessRequest(Request& request, ExpandBuf* pReply) { 1618 JdwpError result = ERR_NONE; 1619 1620 if (request.GetCommandSet() != kJDWPDdmCmdSet) { 1621 /* 1622 * Activity from a debugger, not merely ddms. Mark us as having an 1623 * active debugger session, and zero out the last-activity timestamp 1624 * so waitForDebugger() doesn't return if we stall for a bit here. 1625 */ 1626 Dbg::GoActive(); 1627 last_activity_time_ms_.StoreSequentiallyConsistent(0); 1628 } 1629 1630 /* 1631 * If a debugger event has fired in another thread, wait until the 1632 * initiating thread has suspended itself before processing messages 1633 * from the debugger. Otherwise we (the JDWP thread) could be told to 1634 * resume the thread before it has suspended. 1635 * 1636 * We call with an argument of zero to wait for the current event 1637 * thread to finish, and then clear the block. Depending on the thread 1638 * suspend policy, this may allow events in other threads to fire, 1639 * but those events have no bearing on what the debugger has sent us 1640 * in the current request. 1641 * 1642 * Note that we MUST clear the event token before waking the event 1643 * thread up, or risk waiting for the thread to suspend after we've 1644 * told it to resume. 1645 */ 1646 SetWaitForEventThread(0); 1647 1648 /* 1649 * We do not want events to be sent while we process a request. Indicate the JDWP thread starts 1650 * to process a request so other threads wait for it to finish before sending an event. 1651 */ 1652 StartProcessingRequest(); 1653 1654 /* 1655 * Tell the VM that we're running and shouldn't be interrupted by GC. 1656 * Do this after anything that can stall indefinitely. 1657 */ 1658 Thread* self = Thread::Current(); 1659 ThreadState old_state = self->TransitionFromSuspendedToRunnable(); 1660 1661 expandBufAddSpace(pReply, kJDWPHeaderLen); 1662 1663 size_t i; 1664 for (i = 0; i < arraysize(gHandlers); ++i) { 1665 if (gHandlers[i].cmdSet == request.GetCommandSet() && gHandlers[i].cmd == request.GetCommand() && gHandlers[i].func != NULL) { 1666 VLOG(jdwp) << DescribeCommand(request); 1667 result = (*gHandlers[i].func)(this, request, pReply); 1668 if (result == ERR_NONE) { 1669 request.CheckConsumed(); 1670 } 1671 break; 1672 } 1673 } 1674 if (i == arraysize(gHandlers)) { 1675 LOG(ERROR) << "Command not implemented: " << DescribeCommand(request); 1676 LOG(ERROR) << HexDump(request.data(), request.size(), false, ""); 1677 result = ERR_NOT_IMPLEMENTED; 1678 } 1679 1680 /* 1681 * Set up the reply header. 1682 * 1683 * If we encountered an error, only send the header back. 1684 */ 1685 uint8_t* replyBuf = expandBufGetBuffer(pReply); 1686 size_t replyLength = (result == ERR_NONE) ? expandBufGetLength(pReply) : kJDWPHeaderLen; 1687 Set4BE(replyBuf + 0, replyLength); 1688 Set4BE(replyBuf + 4, request.GetId()); 1689 Set1(replyBuf + 8, kJDWPFlagReply); 1690 Set2BE(replyBuf + 9, result); 1691 1692 CHECK_GT(expandBufGetLength(pReply), 0U) << GetCommandName(request) << " " << request.GetId(); 1693 1694 size_t respLen = expandBufGetLength(pReply) - kJDWPHeaderLen; 1695 VLOG(jdwp) << "REPLY: " << GetCommandName(request) << " " << result << " (length=" << respLen << ")"; 1696 if (false) { 1697 VLOG(jdwp) << HexDump(expandBufGetBuffer(pReply) + kJDWPHeaderLen, respLen, false, ""); 1698 } 1699 1700 VLOG(jdwp) << "----------"; 1701 1702 /* 1703 * Update last-activity timestamp. We really only need this during 1704 * the initial setup. Only update if this is a non-DDMS packet. 1705 */ 1706 if (request.GetCommandSet() != kJDWPDdmCmdSet) { 1707 last_activity_time_ms_.StoreSequentiallyConsistent(MilliTime()); 1708 } 1709 1710 /* tell the VM that GC is okay again */ 1711 self->TransitionFromRunnableToSuspended(old_state); 1712 1713 return replyLength; 1714 } 1715 1716 /* 1717 * Indicates a request is about to be processed. If a thread wants to send an event in the meantime, 1718 * it will need to wait until we processed this request (see EndProcessingRequest). 1719 */ 1720 void JdwpState::StartProcessingRequest() { 1721 Thread* self = Thread::Current(); 1722 CHECK_EQ(self, GetDebugThread()) << "Requests are only processed by debug thread"; 1723 MutexLock mu(self, process_request_lock_); 1724 CHECK_EQ(processing_request_, false); 1725 processing_request_ = true; 1726 } 1727 1728 /* 1729 * Indicates a request has been processed (and we sent its reply). All threads waiting for us (see 1730 * WaitForProcessingRequest) are waken up so they can send events again. 1731 */ 1732 void JdwpState::EndProcessingRequest() { 1733 Thread* self = Thread::Current(); 1734 CHECK_EQ(self, GetDebugThread()) << "Requests are only processed by debug thread"; 1735 MutexLock mu(self, process_request_lock_); 1736 CHECK_EQ(processing_request_, true); 1737 processing_request_ = false; 1738 process_request_cond_.Broadcast(self); 1739 } 1740 1741 /* 1742 * Waits for any request being processed so we do not send an event in the meantime. 1743 */ 1744 void JdwpState::WaitForProcessingRequest() { 1745 Thread* self = Thread::Current(); 1746 CHECK_NE(self, GetDebugThread()) << "Events should not be posted by debug thread"; 1747 MutexLock mu(self, process_request_lock_); 1748 bool waited = false; 1749 while (processing_request_) { 1750 VLOG(jdwp) << StringPrintf("wait for processing request"); 1751 waited = true; 1752 process_request_cond_.Wait(self); 1753 } 1754 if (waited) { 1755 VLOG(jdwp) << StringPrintf("finished waiting for processing request"); 1756 } 1757 CHECK_EQ(processing_request_, false); 1758 } 1759 1760 } // namespace JDWP 1761 1762 } // namespace art 1763
