| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "debugger.h" |
| |
| #include <sys/uio.h> |
| |
| #include <set> |
| |
| #include "arch/context.h" |
| #include "class_linker.h" |
| #include "class_linker-inl.h" |
| #include "dex_file-inl.h" |
| #include "dex_instruction.h" |
| #include "gc/accounting/card_table-inl.h" |
| #include "gc/space/large_object_space.h" |
| #include "gc/space/space-inl.h" |
| #include "invoke_arg_array_builder.h" |
| #include "jdwp/object_registry.h" |
| #include "mirror/art_field-inl.h" |
| #include "mirror/art_method-inl.h" |
| #include "mirror/class.h" |
| #include "mirror/class-inl.h" |
| #include "mirror/class_loader.h" |
| #include "mirror/object-inl.h" |
| #include "mirror/object_array-inl.h" |
| #include "mirror/throwable.h" |
| #include "object_utils.h" |
| #include "safe_map.h" |
| #include "scoped_thread_state_change.h" |
| #include "ScopedLocalRef.h" |
| #include "ScopedPrimitiveArray.h" |
| #include "sirt_ref.h" |
| #include "stack_indirect_reference_table.h" |
| #include "thread_list.h" |
| #include "throw_location.h" |
| #include "utf.h" |
| #include "well_known_classes.h" |
| |
| #ifdef HAVE_ANDROID_OS |
| #include "cutils/properties.h" |
| #endif |
| |
| namespace art { |
| |
| static const size_t kMaxAllocRecordStackDepth = 16; // Max 255. |
| static const size_t kDefaultNumAllocRecords = 64*1024; // Must be a power of 2. |
| |
| struct AllocRecordStackTraceElement { |
| mirror::ArtMethod* method; |
| uint32_t dex_pc; |
| |
| int32_t LineNumber() const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| return MethodHelper(method).GetLineNumFromDexPC(dex_pc); |
| } |
| }; |
| |
| struct AllocRecord { |
| mirror::Class* type; |
| size_t byte_count; |
| uint16_t thin_lock_id; |
| AllocRecordStackTraceElement stack[kMaxAllocRecordStackDepth]; // Unused entries have NULL method. |
| |
| size_t GetDepth() { |
| size_t depth = 0; |
| while (depth < kMaxAllocRecordStackDepth && stack[depth].method != NULL) { |
| ++depth; |
| } |
| return depth; |
| } |
| }; |
| |
| struct Breakpoint { |
| mirror::ArtMethod* method; |
| uint32_t dex_pc; |
| Breakpoint(mirror::ArtMethod* method, uint32_t dex_pc) : method(method), dex_pc(dex_pc) {} |
| }; |
| |
| static std::ostream& operator<<(std::ostream& os, const Breakpoint& rhs) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| os << StringPrintf("Breakpoint[%s @%#x]", PrettyMethod(rhs.method).c_str(), rhs.dex_pc); |
| return os; |
| } |
| |
| struct SingleStepControl { |
| // Are we single-stepping right now? |
| bool is_active; |
| Thread* thread; |
| |
| JDWP::JdwpStepSize step_size; |
| JDWP::JdwpStepDepth step_depth; |
| |
| const mirror::ArtMethod* method; |
| int32_t line_number; // Or -1 for native methods. |
| std::set<uint32_t> dex_pcs; |
| int stack_depth; |
| }; |
| |
| class DebugInstrumentationListener : public instrumentation::InstrumentationListener { |
| public: |
| DebugInstrumentationListener() {} |
| virtual ~DebugInstrumentationListener() {} |
| |
| virtual void MethodEntered(Thread* thread, mirror::Object* this_object, |
| const mirror::ArtMethod* method, uint32_t dex_pc) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| if (method->IsNative()) { |
| // TODO: post location events is a suspension point and native method entry stubs aren't. |
| return; |
| } |
| Dbg::PostLocationEvent(method, 0, this_object, Dbg::kMethodEntry); |
| } |
| |
| virtual void MethodExited(Thread* thread, mirror::Object* this_object, |
| const mirror::ArtMethod* method, |
| uint32_t dex_pc, const JValue& return_value) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| UNUSED(return_value); |
| if (method->IsNative()) { |
| // TODO: post location events is a suspension point and native method entry stubs aren't. |
| return; |
| } |
| Dbg::PostLocationEvent(method, dex_pc, this_object, Dbg::kMethodExit); |
| } |
| |
| virtual void MethodUnwind(Thread* thread, mirror::Object* this_object, |
| const mirror::ArtMethod* method, uint32_t dex_pc) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| // We're not recorded to listen to this kind of event, so complain. |
| LOG(ERROR) << "Unexpected method unwind event in debugger " << PrettyMethod(method) |
| << " " << dex_pc; |
| } |
| |
| virtual void DexPcMoved(Thread* thread, mirror::Object* this_object, |
| const mirror::ArtMethod* method, uint32_t new_dex_pc) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| Dbg::UpdateDebugger(thread, this_object, method, new_dex_pc); |
| } |
| |
| virtual void ExceptionCaught(Thread* thread, const ThrowLocation& throw_location, |
| mirror::ArtMethod* catch_method, uint32_t catch_dex_pc, |
| mirror::Throwable* exception_object) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| Dbg::PostException(thread, throw_location, catch_method, catch_dex_pc, exception_object); |
| } |
| } gDebugInstrumentationListener; |
| |
| // JDWP is allowed unless the Zygote forbids it. |
| static bool gJdwpAllowed = true; |
| |
| // Was there a -Xrunjdwp or -agentlib:jdwp= argument on the command line? |
| static bool gJdwpConfigured = false; |
| |
| // Broken-down JDWP options. (Only valid if IsJdwpConfigured() is true.) |
| static JDWP::JdwpOptions gJdwpOptions; |
| |
| // Runtime JDWP state. |
| static JDWP::JdwpState* gJdwpState = NULL; |
| static bool gDebuggerConnected; // debugger or DDMS is connected. |
| static bool gDebuggerActive; // debugger is making requests. |
| static bool gDisposed; // debugger called VirtualMachine.Dispose, so we should drop the connection. |
| |
| static bool gDdmThreadNotification = false; |
| |
| // DDMS GC-related settings. |
| static Dbg::HpifWhen gDdmHpifWhen = Dbg::HPIF_WHEN_NEVER; |
| static Dbg::HpsgWhen gDdmHpsgWhen = Dbg::HPSG_WHEN_NEVER; |
| static Dbg::HpsgWhat gDdmHpsgWhat; |
| static Dbg::HpsgWhen gDdmNhsgWhen = Dbg::HPSG_WHEN_NEVER; |
| static Dbg::HpsgWhat gDdmNhsgWhat; |
| |
| static ObjectRegistry* gRegistry = NULL; |
| |
| // Recent allocation tracking. |
| static Mutex gAllocTrackerLock DEFAULT_MUTEX_ACQUIRED_AFTER("AllocTracker lock"); |
| AllocRecord* Dbg::recent_allocation_records_ PT_GUARDED_BY(gAllocTrackerLock) = NULL; // TODO: CircularBuffer<AllocRecord> |
| static size_t gAllocRecordMax GUARDED_BY(gAllocTrackerLock) = 0; |
| static size_t gAllocRecordHead GUARDED_BY(gAllocTrackerLock) = 0; |
| static size_t gAllocRecordCount GUARDED_BY(gAllocTrackerLock) = 0; |
| |
| // Breakpoints and single-stepping. |
| static std::vector<Breakpoint> gBreakpoints GUARDED_BY(Locks::breakpoint_lock_); |
| static SingleStepControl gSingleStepControl GUARDED_BY(Locks::breakpoint_lock_); |
| |
| static bool IsBreakpoint(const mirror::ArtMethod* m, uint32_t dex_pc) |
| LOCKS_EXCLUDED(Locks::breakpoint_lock_) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| MutexLock mu(Thread::Current(), *Locks::breakpoint_lock_); |
| for (size_t i = 0; i < gBreakpoints.size(); ++i) { |
| if (gBreakpoints[i].method == m && gBreakpoints[i].dex_pc == dex_pc) { |
| VLOG(jdwp) << "Hit breakpoint #" << i << ": " << gBreakpoints[i]; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static bool IsSuspendedForDebugger(ScopedObjectAccessUnchecked& soa, Thread* thread) { |
| MutexLock mu(soa.Self(), *Locks::thread_suspend_count_lock_); |
| // A thread may be suspended for GC; in this code, we really want to know whether |
| // there's a debugger suspension active. |
| return thread->IsSuspended() && thread->GetDebugSuspendCount() > 0; |
| } |
| |
| static mirror::Array* DecodeArray(JDWP::RefTypeId id, JDWP::JdwpError& status) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(id); |
| if (o == NULL || o == ObjectRegistry::kInvalidObject) { |
| status = JDWP::ERR_INVALID_OBJECT; |
| return NULL; |
| } |
| if (!o->IsArrayInstance()) { |
| status = JDWP::ERR_INVALID_ARRAY; |
| return NULL; |
| } |
| status = JDWP::ERR_NONE; |
| return o->AsArray(); |
| } |
| |
| static mirror::Class* DecodeClass(JDWP::RefTypeId id, JDWP::JdwpError& status) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(id); |
| if (o == NULL || o == ObjectRegistry::kInvalidObject) { |
| status = JDWP::ERR_INVALID_OBJECT; |
| return NULL; |
| } |
| if (!o->IsClass()) { |
| status = JDWP::ERR_INVALID_CLASS; |
| return NULL; |
| } |
| status = JDWP::ERR_NONE; |
| return o->AsClass(); |
| } |
| |
| static JDWP::JdwpError DecodeThread(ScopedObjectAccessUnchecked& soa, JDWP::ObjectId thread_id, Thread*& thread) |
| EXCLUSIVE_LOCKS_REQUIRED(Locks::thread_list_lock_) |
| LOCKS_EXCLUDED(Locks::thread_suspend_count_lock_) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::Object* thread_peer = gRegistry->Get<mirror::Object*>(thread_id); |
| if (thread_peer == NULL || thread_peer == ObjectRegistry::kInvalidObject) { |
| // This isn't even an object. |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| |
| mirror::Class* java_lang_Thread = soa.Decode<mirror::Class*>(WellKnownClasses::java_lang_Thread); |
| if (!java_lang_Thread->IsAssignableFrom(thread_peer->GetClass())) { |
| // This isn't a thread. |
| return JDWP::ERR_INVALID_THREAD; |
| } |
| |
| thread = Thread::FromManagedThread(soa, thread_peer); |
| if (thread == NULL) { |
| // This is a java.lang.Thread without a Thread*. Must be a zombie. |
| return JDWP::ERR_THREAD_NOT_ALIVE; |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| static JDWP::JdwpTag BasicTagFromDescriptor(const char* descriptor) { |
| // JDWP deliberately uses the descriptor characters' ASCII values for its enum. |
| // Note that by "basic" we mean that we don't get more specific than JT_OBJECT. |
| return static_cast<JDWP::JdwpTag>(descriptor[0]); |
| } |
| |
| static JDWP::JdwpTag TagFromClass(mirror::Class* c) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| CHECK(c != NULL); |
| if (c->IsArrayClass()) { |
| return JDWP::JT_ARRAY; |
| } |
| |
| ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); |
| if (c->IsStringClass()) { |
| return JDWP::JT_STRING; |
| } else if (c->IsClassClass()) { |
| return JDWP::JT_CLASS_OBJECT; |
| } else if (class_linker->FindSystemClass("Ljava/lang/Thread;")->IsAssignableFrom(c)) { |
| return JDWP::JT_THREAD; |
| } else if (class_linker->FindSystemClass("Ljava/lang/ThreadGroup;")->IsAssignableFrom(c)) { |
| return JDWP::JT_THREAD_GROUP; |
| } else if (class_linker->FindSystemClass("Ljava/lang/ClassLoader;")->IsAssignableFrom(c)) { |
| return JDWP::JT_CLASS_LOADER; |
| } else { |
| return JDWP::JT_OBJECT; |
| } |
| } |
| |
| /* |
| * Objects declared to hold Object might actually hold a more specific |
| * type. The debugger may take a special interest in these (e.g. it |
| * wants to display the contents of Strings), so we want to return an |
| * appropriate tag. |
| * |
| * Null objects are tagged JT_OBJECT. |
| */ |
| static JDWP::JdwpTag TagFromObject(const mirror::Object* o) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| return (o == NULL) ? JDWP::JT_OBJECT : TagFromClass(o->GetClass()); |
| } |
| |
| static bool IsPrimitiveTag(JDWP::JdwpTag tag) { |
| switch (tag) { |
| case JDWP::JT_BOOLEAN: |
| case JDWP::JT_BYTE: |
| case JDWP::JT_CHAR: |
| case JDWP::JT_FLOAT: |
| case JDWP::JT_DOUBLE: |
| case JDWP::JT_INT: |
| case JDWP::JT_LONG: |
| case JDWP::JT_SHORT: |
| case JDWP::JT_VOID: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| /* |
| * Handle one of the JDWP name/value pairs. |
| * |
| * JDWP options are: |
| * help: if specified, show help message and bail |
| * transport: may be dt_socket or dt_shmem |
| * address: for dt_socket, "host:port", or just "port" when listening |
| * server: if "y", wait for debugger to attach; if "n", attach to debugger |
| * timeout: how long to wait for debugger to connect / listen |
| * |
| * Useful with server=n (these aren't supported yet): |
| * onthrow=<exception-name>: connect to debugger when exception thrown |
| * onuncaught=y|n: connect to debugger when uncaught exception thrown |
| * launch=<command-line>: launch the debugger itself |
| * |
| * The "transport" option is required, as is "address" if server=n. |
| */ |
| static bool ParseJdwpOption(const std::string& name, const std::string& value) { |
| if (name == "transport") { |
| if (value == "dt_socket") { |
| gJdwpOptions.transport = JDWP::kJdwpTransportSocket; |
| } else if (value == "dt_android_adb") { |
| gJdwpOptions.transport = JDWP::kJdwpTransportAndroidAdb; |
| } else { |
| LOG(ERROR) << "JDWP transport not supported: " << value; |
| return false; |
| } |
| } else if (name == "server") { |
| if (value == "n") { |
| gJdwpOptions.server = false; |
| } else if (value == "y") { |
| gJdwpOptions.server = true; |
| } else { |
| LOG(ERROR) << "JDWP option 'server' must be 'y' or 'n'"; |
| return false; |
| } |
| } else if (name == "suspend") { |
| if (value == "n") { |
| gJdwpOptions.suspend = false; |
| } else if (value == "y") { |
| gJdwpOptions.suspend = true; |
| } else { |
| LOG(ERROR) << "JDWP option 'suspend' must be 'y' or 'n'"; |
| return false; |
| } |
| } else if (name == "address") { |
| /* this is either <port> or <host>:<port> */ |
| std::string port_string; |
| gJdwpOptions.host.clear(); |
| std::string::size_type colon = value.find(':'); |
| if (colon != std::string::npos) { |
| gJdwpOptions.host = value.substr(0, colon); |
| port_string = value.substr(colon + 1); |
| } else { |
| port_string = value; |
| } |
| if (port_string.empty()) { |
| LOG(ERROR) << "JDWP address missing port: " << value; |
| return false; |
| } |
| char* end; |
| uint64_t port = strtoul(port_string.c_str(), &end, 10); |
| if (*end != '\0' || port > 0xffff) { |
| LOG(ERROR) << "JDWP address has junk in port field: " << value; |
| return false; |
| } |
| gJdwpOptions.port = port; |
| } else if (name == "launch" || name == "onthrow" || name == "oncaught" || name == "timeout") { |
| /* valid but unsupported */ |
| LOG(INFO) << "Ignoring JDWP option '" << name << "'='" << value << "'"; |
| } else { |
| LOG(INFO) << "Ignoring unrecognized JDWP option '" << name << "'='" << value << "'"; |
| } |
| |
| return true; |
| } |
| |
| /* |
| * Parse the latter half of a -Xrunjdwp/-agentlib:jdwp= string, e.g.: |
| * "transport=dt_socket,address=8000,server=y,suspend=n" |
| */ |
| bool Dbg::ParseJdwpOptions(const std::string& options) { |
| VLOG(jdwp) << "ParseJdwpOptions: " << options; |
| |
| std::vector<std::string> pairs; |
| Split(options, ',', pairs); |
| |
| for (size_t i = 0; i < pairs.size(); ++i) { |
| std::string::size_type equals = pairs[i].find('='); |
| if (equals == std::string::npos) { |
| LOG(ERROR) << "Can't parse JDWP option '" << pairs[i] << "' in '" << options << "'"; |
| return false; |
| } |
| ParseJdwpOption(pairs[i].substr(0, equals), pairs[i].substr(equals + 1)); |
| } |
| |
| if (gJdwpOptions.transport == JDWP::kJdwpTransportUnknown) { |
| LOG(ERROR) << "Must specify JDWP transport: " << options; |
| } |
| if (!gJdwpOptions.server && (gJdwpOptions.host.empty() || gJdwpOptions.port == 0)) { |
| LOG(ERROR) << "Must specify JDWP host and port when server=n: " << options; |
| return false; |
| } |
| |
| gJdwpConfigured = true; |
| return true; |
| } |
| |
| void Dbg::StartJdwp() { |
| if (!gJdwpAllowed || !IsJdwpConfigured()) { |
| // No JDWP for you! |
| return; |
| } |
| |
| CHECK(gRegistry == NULL); |
| gRegistry = new ObjectRegistry; |
| |
| // Init JDWP if the debugger is enabled. This may connect out to a |
| // debugger, passively listen for a debugger, or block waiting for a |
| // debugger. |
| gJdwpState = JDWP::JdwpState::Create(&gJdwpOptions); |
| if (gJdwpState == NULL) { |
| // We probably failed because some other process has the port already, which means that |
| // if we don't abort the user is likely to think they're talking to us when they're actually |
| // talking to that other process. |
| LOG(FATAL) << "Debugger thread failed to initialize"; |
| } |
| |
| // If a debugger has already attached, send the "welcome" message. |
| // This may cause us to suspend all threads. |
| if (gJdwpState->IsActive()) { |
| ScopedObjectAccess soa(Thread::Current()); |
| if (!gJdwpState->PostVMStart()) { |
| LOG(WARNING) << "Failed to post 'start' message to debugger"; |
| } |
| } |
| } |
| |
| void Dbg::StopJdwp() { |
| delete gJdwpState; |
| delete gRegistry; |
| gRegistry = NULL; |
| } |
| |
| void Dbg::GcDidFinish() { |
| if (gDdmHpifWhen != HPIF_WHEN_NEVER) { |
| ScopedObjectAccess soa(Thread::Current()); |
| LOG(DEBUG) << "Sending heap info to DDM"; |
| DdmSendHeapInfo(gDdmHpifWhen); |
| } |
| if (gDdmHpsgWhen != HPSG_WHEN_NEVER) { |
| ScopedObjectAccess soa(Thread::Current()); |
| LOG(DEBUG) << "Dumping heap to DDM"; |
| DdmSendHeapSegments(false); |
| } |
| if (gDdmNhsgWhen != HPSG_WHEN_NEVER) { |
| ScopedObjectAccess soa(Thread::Current()); |
| LOG(DEBUG) << "Dumping native heap to DDM"; |
| DdmSendHeapSegments(true); |
| } |
| } |
| |
| void Dbg::SetJdwpAllowed(bool allowed) { |
| gJdwpAllowed = allowed; |
| } |
| |
| DebugInvokeReq* Dbg::GetInvokeReq() { |
| return Thread::Current()->GetInvokeReq(); |
| } |
| |
| Thread* Dbg::GetDebugThread() { |
| return (gJdwpState != NULL) ? gJdwpState->GetDebugThread() : NULL; |
| } |
| |
| void Dbg::ClearWaitForEventThread() { |
| gJdwpState->ClearWaitForEventThread(); |
| } |
| |
| void Dbg::Connected() { |
| CHECK(!gDebuggerConnected); |
| VLOG(jdwp) << "JDWP has attached"; |
| gDebuggerConnected = true; |
| gDisposed = false; |
| } |
| |
| void Dbg::Disposed() { |
| gDisposed = true; |
| } |
| |
| bool Dbg::IsDisposed() { |
| return gDisposed; |
| } |
| |
| void Dbg::GoActive() { |
| // Enable all debugging features, including scans for breakpoints. |
| // This is a no-op if we're already active. |
| // Only called from the JDWP handler thread. |
| if (gDebuggerActive) { |
| return; |
| } |
| |
| { |
| // TODO: dalvik only warned if there were breakpoints left over. clear in Dbg::Disconnected? |
| MutexLock mu(Thread::Current(), *Locks::breakpoint_lock_); |
| CHECK_EQ(gBreakpoints.size(), 0U); |
| } |
| |
| Runtime* runtime = Runtime::Current(); |
| runtime->GetThreadList()->SuspendAll(); |
| Thread* self = Thread::Current(); |
| ThreadState old_state = self->SetStateUnsafe(kRunnable); |
| CHECK_NE(old_state, kRunnable); |
| runtime->GetInstrumentation()->AddListener(&gDebugInstrumentationListener, |
| instrumentation::Instrumentation::kMethodEntered | |
| instrumentation::Instrumentation::kMethodExited | |
| instrumentation::Instrumentation::kDexPcMoved | |
| instrumentation::Instrumentation::kExceptionCaught); |
| gDebuggerActive = true; |
| CHECK_EQ(self->SetStateUnsafe(old_state), kRunnable); |
| runtime->GetThreadList()->ResumeAll(); |
| |
| LOG(INFO) << "Debugger is active"; |
| } |
| |
| void Dbg::Disconnected() { |
| CHECK(gDebuggerConnected); |
| |
| LOG(INFO) << "Debugger is no longer active"; |
| |
| // Suspend all threads and exclusively acquire the mutator lock. Set the state of the thread |
| // to kRunnable to avoid scoped object access transitions. Remove the debugger as a listener |
| // and clear the object registry. |
| Runtime* runtime = Runtime::Current(); |
| runtime->GetThreadList()->SuspendAll(); |
| Thread* self = Thread::Current(); |
| ThreadState old_state = self->SetStateUnsafe(kRunnable); |
| runtime->GetInstrumentation()->RemoveListener(&gDebugInstrumentationListener, |
| instrumentation::Instrumentation::kMethodEntered | |
| instrumentation::Instrumentation::kMethodExited | |
| instrumentation::Instrumentation::kDexPcMoved | |
| instrumentation::Instrumentation::kExceptionCaught); |
| gDebuggerActive = false; |
| gRegistry->Clear(); |
| gDebuggerConnected = false; |
| CHECK_EQ(self->SetStateUnsafe(old_state), kRunnable); |
| runtime->GetThreadList()->ResumeAll(); |
| } |
| |
| bool Dbg::IsDebuggerActive() { |
| return gDebuggerActive; |
| } |
| |
| bool Dbg::IsJdwpConfigured() { |
| return gJdwpConfigured; |
| } |
| |
| int64_t Dbg::LastDebuggerActivity() { |
| return gJdwpState->LastDebuggerActivity(); |
| } |
| |
| void Dbg::UndoDebuggerSuspensions() { |
| Runtime::Current()->GetThreadList()->UndoDebuggerSuspensions(); |
| } |
| |
| std::string Dbg::GetClassName(JDWP::RefTypeId class_id) { |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(class_id); |
| if (o == NULL) { |
| return "NULL"; |
| } |
| if (o == ObjectRegistry::kInvalidObject) { |
| return StringPrintf("invalid object %p", reinterpret_cast<void*>(class_id)); |
| } |
| if (!o->IsClass()) { |
| return StringPrintf("non-class %p", o); // This is only used for debugging output anyway. |
| } |
| return DescriptorToName(ClassHelper(o->AsClass()).GetDescriptor()); |
| } |
| |
| JDWP::JdwpError Dbg::GetClassObject(JDWP::RefTypeId id, JDWP::ObjectId& class_object_id) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(id, status); |
| if (c == NULL) { |
| return status; |
| } |
| class_object_id = gRegistry->Add(c); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetSuperclass(JDWP::RefTypeId id, JDWP::RefTypeId& superclass_id) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(id, status); |
| if (c == NULL) { |
| return status; |
| } |
| if (c->IsInterface()) { |
| // http://code.google.com/p/android/issues/detail?id=20856 |
| superclass_id = 0; |
| } else { |
| superclass_id = gRegistry->Add(c->GetSuperClass()); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetClassLoader(JDWP::RefTypeId id, JDWP::ExpandBuf* pReply) { |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(id); |
| if (o == NULL || o == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| expandBufAddObjectId(pReply, gRegistry->Add(o->GetClass()->GetClassLoader())); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetModifiers(JDWP::RefTypeId id, JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(id, status); |
| if (c == NULL) { |
| return status; |
| } |
| |
| uint32_t access_flags = c->GetAccessFlags() & kAccJavaFlagsMask; |
| |
| // Set ACC_SUPER; dex files don't contain this flag, but all classes are supposed to have it set. |
| // Class.getModifiers doesn't return it, but JDWP does, so we set it here. |
| access_flags |= kAccSuper; |
| |
| expandBufAdd4BE(pReply, access_flags); |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetMonitorInfo(JDWP::ObjectId object_id, JDWP::ExpandBuf* reply) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id); |
| if (o == NULL || o == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| |
| // Ensure all threads are suspended while we read objects' lock words. |
| Thread* self = Thread::Current(); |
| Locks::mutator_lock_->SharedUnlock(self); |
| Locks::mutator_lock_->ExclusiveLock(self); |
| |
| MonitorInfo monitor_info(o); |
| |
| Locks::mutator_lock_->ExclusiveUnlock(self); |
| Locks::mutator_lock_->SharedLock(self); |
| |
| if (monitor_info.owner_ != NULL) { |
| expandBufAddObjectId(reply, gRegistry->Add(monitor_info.owner_->GetPeer())); |
| } else { |
| expandBufAddObjectId(reply, gRegistry->Add(NULL)); |
| } |
| expandBufAdd4BE(reply, monitor_info.entry_count_); |
| expandBufAdd4BE(reply, monitor_info.waiters_.size()); |
| for (size_t i = 0; i < monitor_info.waiters_.size(); ++i) { |
| expandBufAddObjectId(reply, gRegistry->Add(monitor_info.waiters_[i]->GetPeer())); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetOwnedMonitors(JDWP::ObjectId thread_id, |
| std::vector<JDWP::ObjectId>& monitors, |
| std::vector<uint32_t>& stack_depths) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread; |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| |
| struct OwnedMonitorVisitor : public StackVisitor { |
| OwnedMonitorVisitor(Thread* thread, Context* context) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| : StackVisitor(thread, context), current_stack_depth(0) {} |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| if (!GetMethod()->IsRuntimeMethod()) { |
| Monitor::VisitLocks(this, AppendOwnedMonitors, this); |
| ++current_stack_depth; |
| } |
| return true; |
| } |
| |
| static void AppendOwnedMonitors(mirror::Object* owned_monitor, void* arg) { |
| OwnedMonitorVisitor* visitor = reinterpret_cast<OwnedMonitorVisitor*>(arg); |
| visitor->monitors.push_back(owned_monitor); |
| visitor->stack_depths.push_back(visitor->current_stack_depth); |
| } |
| |
| size_t current_stack_depth; |
| std::vector<mirror::Object*> monitors; |
| std::vector<uint32_t> stack_depths; |
| }; |
| UniquePtr<Context> context(Context::Create()); |
| OwnedMonitorVisitor visitor(thread, context.get()); |
| visitor.WalkStack(); |
| |
| for (size_t i = 0; i < visitor.monitors.size(); ++i) { |
| monitors.push_back(gRegistry->Add(visitor.monitors[i])); |
| stack_depths.push_back(visitor.stack_depths[i]); |
| } |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetContendedMonitor(JDWP::ObjectId thread_id, JDWP::ObjectId& contended_monitor) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread; |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| |
| contended_monitor = gRegistry->Add(Monitor::GetContendedMonitor(thread)); |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetInstanceCounts(const std::vector<JDWP::RefTypeId>& class_ids, |
| std::vector<uint64_t>& counts) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| std::vector<mirror::Class*> classes; |
| counts.clear(); |
| for (size_t i = 0; i < class_ids.size(); ++i) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(class_ids[i], status); |
| if (c == NULL) { |
| return status; |
| } |
| classes.push_back(c); |
| counts.push_back(0); |
| } |
| |
| Runtime::Current()->GetHeap()->CountInstances(classes, false, &counts[0]); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetInstances(JDWP::RefTypeId class_id, int32_t max_count, std::vector<JDWP::ObjectId>& instances) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(class_id, status); |
| if (c == NULL) { |
| return status; |
| } |
| |
| std::vector<mirror::Object*> raw_instances; |
| Runtime::Current()->GetHeap()->GetInstances(c, max_count, raw_instances); |
| for (size_t i = 0; i < raw_instances.size(); ++i) { |
| instances.push_back(gRegistry->Add(raw_instances[i])); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetReferringObjects(JDWP::ObjectId object_id, int32_t max_count, |
| std::vector<JDWP::ObjectId>& referring_objects) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id); |
| if (o == NULL || o == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| |
| std::vector<mirror::Object*> raw_instances; |
| Runtime::Current()->GetHeap()->GetReferringObjects(o, max_count, raw_instances); |
| for (size_t i = 0; i < raw_instances.size(); ++i) { |
| referring_objects.push_back(gRegistry->Add(raw_instances[i])); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::DisableCollection(JDWP::ObjectId object_id) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| gRegistry->DisableCollection(object_id); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::EnableCollection(JDWP::ObjectId object_id) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| gRegistry->EnableCollection(object_id); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::IsCollected(JDWP::ObjectId object_id, bool& is_collected) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| is_collected = gRegistry->IsCollected(object_id); |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::DisposeObject(JDWP::ObjectId object_id, uint32_t reference_count) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| gRegistry->DisposeObject(object_id, reference_count); |
| } |
| |
| JDWP::JdwpError Dbg::GetReflectedType(JDWP::RefTypeId class_id, JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(class_id, status); |
| if (c == NULL) { |
| return status; |
| } |
| |
| expandBufAdd1(pReply, c->IsInterface() ? JDWP::TT_INTERFACE : JDWP::TT_CLASS); |
| expandBufAddRefTypeId(pReply, class_id); |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::GetClassList(std::vector<JDWP::RefTypeId>& classes) { |
| // Get the complete list of reference classes (i.e. all classes except |
| // the primitive types). |
| // Returns a newly-allocated buffer full of RefTypeId values. |
| struct ClassListCreator { |
| explicit ClassListCreator(std::vector<JDWP::RefTypeId>& classes) : classes(classes) { |
| } |
| |
| static bool Visit(mirror::Class* c, void* arg) { |
| return reinterpret_cast<ClassListCreator*>(arg)->Visit(c); |
| } |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| bool Visit(mirror::Class* c) NO_THREAD_SAFETY_ANALYSIS { |
| if (!c->IsPrimitive()) { |
| classes.push_back(gRegistry->AddRefType(c)); |
| } |
| return true; |
| } |
| |
| std::vector<JDWP::RefTypeId>& classes; |
| }; |
| |
| ClassListCreator clc(classes); |
| Runtime::Current()->GetClassLinker()->VisitClasses(ClassListCreator::Visit, &clc); |
| } |
| |
| JDWP::JdwpError Dbg::GetClassInfo(JDWP::RefTypeId class_id, JDWP::JdwpTypeTag* pTypeTag, uint32_t* pStatus, std::string* pDescriptor) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(class_id, status); |
| if (c == NULL) { |
| return status; |
| } |
| |
| if (c->IsArrayClass()) { |
| *pStatus = JDWP::CS_VERIFIED | JDWP::CS_PREPARED; |
| *pTypeTag = JDWP::TT_ARRAY; |
| } else { |
| if (c->IsErroneous()) { |
| *pStatus = JDWP::CS_ERROR; |
| } else { |
| *pStatus = JDWP::CS_VERIFIED | JDWP::CS_PREPARED | JDWP::CS_INITIALIZED; |
| } |
| *pTypeTag = c->IsInterface() ? JDWP::TT_INTERFACE : JDWP::TT_CLASS; |
| } |
| |
| if (pDescriptor != NULL) { |
| *pDescriptor = ClassHelper(c).GetDescriptor(); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::FindLoadedClassBySignature(const char* descriptor, std::vector<JDWP::RefTypeId>& ids) { |
| std::vector<mirror::Class*> classes; |
| Runtime::Current()->GetClassLinker()->LookupClasses(descriptor, classes); |
| ids.clear(); |
| for (size_t i = 0; i < classes.size(); ++i) { |
| ids.push_back(gRegistry->Add(classes[i])); |
| } |
| } |
| |
| JDWP::JdwpError Dbg::GetReferenceType(JDWP::ObjectId object_id, JDWP::ExpandBuf* pReply) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id); |
| if (o == NULL || o == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| |
| JDWP::JdwpTypeTag type_tag; |
| if (o->GetClass()->IsArrayClass()) { |
| type_tag = JDWP::TT_ARRAY; |
| } else if (o->GetClass()->IsInterface()) { |
| type_tag = JDWP::TT_INTERFACE; |
| } else { |
| type_tag = JDWP::TT_CLASS; |
| } |
| JDWP::RefTypeId type_id = gRegistry->AddRefType(o->GetClass()); |
| |
| expandBufAdd1(pReply, type_tag); |
| expandBufAddRefTypeId(pReply, type_id); |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetSignature(JDWP::RefTypeId class_id, std::string* signature) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(class_id, status); |
| if (c == NULL) { |
| return status; |
| } |
| *signature = ClassHelper(c).GetDescriptor(); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetSourceFile(JDWP::RefTypeId class_id, std::string& result) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(class_id, status); |
| if (c == NULL) { |
| return status; |
| } |
| result = ClassHelper(c).GetSourceFile(); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetObjectTag(JDWP::ObjectId object_id, uint8_t& tag) { |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id); |
| if (o == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| tag = TagFromObject(o); |
| return JDWP::ERR_NONE; |
| } |
| |
| size_t Dbg::GetTagWidth(JDWP::JdwpTag tag) { |
| switch (tag) { |
| case JDWP::JT_VOID: |
| return 0; |
| case JDWP::JT_BYTE: |
| case JDWP::JT_BOOLEAN: |
| return 1; |
| case JDWP::JT_CHAR: |
| case JDWP::JT_SHORT: |
| return 2; |
| case JDWP::JT_FLOAT: |
| case JDWP::JT_INT: |
| return 4; |
| case JDWP::JT_ARRAY: |
| case JDWP::JT_OBJECT: |
| case JDWP::JT_STRING: |
| case JDWP::JT_THREAD: |
| case JDWP::JT_THREAD_GROUP: |
| case JDWP::JT_CLASS_LOADER: |
| case JDWP::JT_CLASS_OBJECT: |
| return sizeof(JDWP::ObjectId); |
| case JDWP::JT_DOUBLE: |
| case JDWP::JT_LONG: |
| return 8; |
| default: |
| LOG(FATAL) << "Unknown tag " << tag; |
| return -1; |
| } |
| } |
| |
| JDWP::JdwpError Dbg::GetArrayLength(JDWP::ObjectId array_id, int& length) { |
| JDWP::JdwpError status; |
| mirror::Array* a = DecodeArray(array_id, status); |
| if (a == NULL) { |
| return status; |
| } |
| length = a->GetLength(); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::OutputArray(JDWP::ObjectId array_id, int offset, int count, JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError status; |
| mirror::Array* a = DecodeArray(array_id, status); |
| if (a == NULL) { |
| return status; |
| } |
| |
| if (offset < 0 || count < 0 || offset > a->GetLength() || a->GetLength() - offset < count) { |
| LOG(WARNING) << __FUNCTION__ << " access out of bounds: offset=" << offset << "; count=" << count; |
| return JDWP::ERR_INVALID_LENGTH; |
| } |
| std::string descriptor(ClassHelper(a->GetClass()).GetDescriptor()); |
| JDWP::JdwpTag tag = BasicTagFromDescriptor(descriptor.c_str() + 1); |
| |
| expandBufAdd1(pReply, tag); |
| expandBufAdd4BE(pReply, count); |
| |
| if (IsPrimitiveTag(tag)) { |
| size_t width = GetTagWidth(tag); |
| uint8_t* dst = expandBufAddSpace(pReply, count * width); |
| if (width == 8) { |
| const uint64_t* src8 = reinterpret_cast<uint64_t*>(a->GetRawData(sizeof(uint64_t))); |
| for (int i = 0; i < count; ++i) JDWP::Write8BE(&dst, src8[offset + i]); |
| } else if (width == 4) { |
| const uint32_t* src4 = reinterpret_cast<uint32_t*>(a->GetRawData(sizeof(uint32_t))); |
| for (int i = 0; i < count; ++i) JDWP::Write4BE(&dst, src4[offset + i]); |
| } else if (width == 2) { |
| const uint16_t* src2 = reinterpret_cast<uint16_t*>(a->GetRawData(sizeof(uint16_t))); |
| for (int i = 0; i < count; ++i) JDWP::Write2BE(&dst, src2[offset + i]); |
| } else { |
| const uint8_t* src = reinterpret_cast<uint8_t*>(a->GetRawData(sizeof(uint8_t))); |
| memcpy(dst, &src[offset * width], count * width); |
| } |
| } else { |
| mirror::ObjectArray<mirror::Object>* oa = a->AsObjectArray<mirror::Object>(); |
| for (int i = 0; i < count; ++i) { |
| mirror::Object* element = oa->Get(offset + i); |
| JDWP::JdwpTag specific_tag = (element != NULL) ? TagFromObject(element) : tag; |
| expandBufAdd1(pReply, specific_tag); |
| expandBufAddObjectId(pReply, gRegistry->Add(element)); |
| } |
| } |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| template <typename T> void CopyArrayData(mirror::Array* a, JDWP::Request& src, int offset, int count) { |
| DCHECK(a->GetClass()->IsPrimitiveArray()); |
| |
| T* dst = &(reinterpret_cast<T*>(a->GetRawData(sizeof(T)))[offset * sizeof(T)]); |
| for (int i = 0; i < count; ++i) { |
| *dst++ = src.ReadValue(sizeof(T)); |
| } |
| } |
| |
| JDWP::JdwpError Dbg::SetArrayElements(JDWP::ObjectId array_id, int offset, int count, |
| JDWP::Request& request) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| JDWP::JdwpError status; |
| mirror::Array* dst = DecodeArray(array_id, status); |
| if (dst == NULL) { |
| return status; |
| } |
| |
| if (offset < 0 || count < 0 || offset > dst->GetLength() || dst->GetLength() - offset < count) { |
| LOG(WARNING) << __FUNCTION__ << " access out of bounds: offset=" << offset << "; count=" << count; |
| return JDWP::ERR_INVALID_LENGTH; |
| } |
| const char* descriptor = ClassHelper(dst->GetClass()).GetDescriptor(); |
| JDWP::JdwpTag tag = BasicTagFromDescriptor(descriptor + 1); |
| |
| if (IsPrimitiveTag(tag)) { |
| size_t width = GetTagWidth(tag); |
| if (width == 8) { |
| CopyArrayData<uint64_t>(dst, request, offset, count); |
| } else if (width == 4) { |
| CopyArrayData<uint32_t>(dst, request, offset, count); |
| } else if (width == 2) { |
| CopyArrayData<uint16_t>(dst, request, offset, count); |
| } else { |
| CopyArrayData<uint8_t>(dst, request, offset, count); |
| } |
| } else { |
| mirror::ObjectArray<mirror::Object>* oa = dst->AsObjectArray<mirror::Object>(); |
| for (int i = 0; i < count; ++i) { |
| JDWP::ObjectId id = request.ReadObjectId(); |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(id); |
| if (o == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| oa->Set(offset + i, o); |
| } |
| } |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::ObjectId Dbg::CreateString(const std::string& str) { |
| return gRegistry->Add(mirror::String::AllocFromModifiedUtf8(Thread::Current(), str.c_str())); |
| } |
| |
| JDWP::JdwpError Dbg::CreateObject(JDWP::RefTypeId class_id, JDWP::ObjectId& new_object) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(class_id, status); |
| if (c == NULL) { |
| return status; |
| } |
| new_object = gRegistry->Add(c->AllocObject(Thread::Current())); |
| return JDWP::ERR_NONE; |
| } |
| |
| /* |
| * Used by Eclipse's "Display" view to evaluate "new byte[5]" to get "(byte[]) [0, 0, 0, 0, 0]". |
| */ |
| JDWP::JdwpError Dbg::CreateArrayObject(JDWP::RefTypeId array_class_id, uint32_t length, |
| JDWP::ObjectId& new_array) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(array_class_id, status); |
| if (c == NULL) { |
| return status; |
| } |
| new_array = gRegistry->Add( |
| mirror::Array::Alloc<kMovingCollector, true>(Thread::Current(), c, length)); |
| return JDWP::ERR_NONE; |
| } |
| |
| bool Dbg::MatchType(JDWP::RefTypeId instance_class_id, JDWP::RefTypeId class_id) { |
| JDWP::JdwpError status; |
| mirror::Class* c1 = DecodeClass(instance_class_id, status); |
| CHECK(c1 != NULL); |
| mirror::Class* c2 = DecodeClass(class_id, status); |
| CHECK(c2 != NULL); |
| return c1->IsAssignableFrom(c2); |
| } |
| |
| static JDWP::FieldId ToFieldId(const mirror::ArtField* f) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| CHECK(!kMovingFields); |
| return static_cast<JDWP::FieldId>(reinterpret_cast<uintptr_t>(f)); |
| } |
| |
| static JDWP::MethodId ToMethodId(const mirror::ArtMethod* m) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| CHECK(!kMovingMethods); |
| return static_cast<JDWP::MethodId>(reinterpret_cast<uintptr_t>(m)); |
| } |
| |
| static mirror::ArtField* FromFieldId(JDWP::FieldId fid) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| CHECK(!kMovingFields); |
| return reinterpret_cast<mirror::ArtField*>(static_cast<uintptr_t>(fid)); |
| } |
| |
| static mirror::ArtMethod* FromMethodId(JDWP::MethodId mid) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| CHECK(!kMovingMethods); |
| return reinterpret_cast<mirror::ArtMethod*>(static_cast<uintptr_t>(mid)); |
| } |
| |
| static void SetLocation(JDWP::JdwpLocation& location, mirror::ArtMethod* m, uint32_t dex_pc) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| if (m == NULL) { |
| memset(&location, 0, sizeof(location)); |
| } else { |
| mirror::Class* c = m->GetDeclaringClass(); |
| location.type_tag = c->IsInterface() ? JDWP::TT_INTERFACE : JDWP::TT_CLASS; |
| location.class_id = gRegistry->Add(c); |
| location.method_id = ToMethodId(m); |
| location.dex_pc = dex_pc; |
| } |
| } |
| |
| std::string Dbg::GetMethodName(JDWP::MethodId method_id) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::ArtMethod* m = FromMethodId(method_id); |
| return MethodHelper(m).GetName(); |
| } |
| |
| std::string Dbg::GetFieldName(JDWP::FieldId field_id) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::ArtField* f = FromFieldId(field_id); |
| return FieldHelper(f).GetName(); |
| } |
| |
| /* |
| * Augment the access flags for synthetic methods and fields by setting |
| * the (as described by the spec) "0xf0000000 bit". Also, strip out any |
| * flags not specified by the Java programming language. |
| */ |
| static uint32_t MangleAccessFlags(uint32_t accessFlags) { |
| accessFlags &= kAccJavaFlagsMask; |
| if ((accessFlags & kAccSynthetic) != 0) { |
| accessFlags |= 0xf0000000; |
| } |
| return accessFlags; |
| } |
| |
| static const uint16_t kEclipseWorkaroundSlot = 1000; |
| |
| /* |
| * Eclipse appears to expect that the "this" reference is in slot zero. |
| * If it's not, the "variables" display will show two copies of "this", |
| * possibly because it gets "this" from SF.ThisObject and then displays |
| * all locals with nonzero slot numbers. |
| * |
| * So, we remap the item in slot 0 to 1000, and remap "this" to zero. On |
| * SF.GetValues / SF.SetValues we map them back. |
| * |
| * TODO: jdb uses the value to determine whether a variable is a local or an argument, |
| * by checking whether it's less than the number of arguments. To make that work, we'd |
| * have to "mangle" all the arguments to come first, not just the implicit argument 'this'. |
| */ |
| static uint16_t MangleSlot(uint16_t slot, const char* name) { |
| uint16_t newSlot = slot; |
| if (strcmp(name, "this") == 0) { |
| newSlot = 0; |
| } else if (slot == 0) { |
| newSlot = kEclipseWorkaroundSlot; |
| } |
| return newSlot; |
| } |
| |
| static uint16_t DemangleSlot(uint16_t slot, mirror::ArtMethod* m) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| if (slot == kEclipseWorkaroundSlot) { |
| return 0; |
| } else if (slot == 0) { |
| const DexFile::CodeItem* code_item = MethodHelper(m).GetCodeItem(); |
| CHECK(code_item != NULL) << PrettyMethod(m); |
| return code_item->registers_size_ - code_item->ins_size_; |
| } |
| return slot; |
| } |
| |
| JDWP::JdwpError Dbg::OutputDeclaredFields(JDWP::RefTypeId class_id, bool with_generic, JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(class_id, status); |
| if (c == NULL) { |
| return status; |
| } |
| |
| size_t instance_field_count = c->NumInstanceFields(); |
| size_t static_field_count = c->NumStaticFields(); |
| |
| expandBufAdd4BE(pReply, instance_field_count + static_field_count); |
| |
| for (size_t i = 0; i < instance_field_count + static_field_count; ++i) { |
| mirror::ArtField* f = (i < instance_field_count) ? c->GetInstanceField(i) : c->GetStaticField(i - instance_field_count); |
| FieldHelper fh(f); |
| expandBufAddFieldId(pReply, ToFieldId(f)); |
| expandBufAddUtf8String(pReply, fh.GetName()); |
| expandBufAddUtf8String(pReply, fh.GetTypeDescriptor()); |
| if (with_generic) { |
| static const char genericSignature[1] = ""; |
| expandBufAddUtf8String(pReply, genericSignature); |
| } |
| expandBufAdd4BE(pReply, MangleAccessFlags(f->GetAccessFlags())); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::OutputDeclaredMethods(JDWP::RefTypeId class_id, bool with_generic, |
| JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(class_id, status); |
| if (c == NULL) { |
| return status; |
| } |
| |
| size_t direct_method_count = c->NumDirectMethods(); |
| size_t virtual_method_count = c->NumVirtualMethods(); |
| |
| expandBufAdd4BE(pReply, direct_method_count + virtual_method_count); |
| |
| for (size_t i = 0; i < direct_method_count + virtual_method_count; ++i) { |
| mirror::ArtMethod* m = (i < direct_method_count) ? c->GetDirectMethod(i) : c->GetVirtualMethod(i - direct_method_count); |
| MethodHelper mh(m); |
| expandBufAddMethodId(pReply, ToMethodId(m)); |
| expandBufAddUtf8String(pReply, mh.GetName()); |
| expandBufAddUtf8String(pReply, mh.GetSignature().ToString()); |
| if (with_generic) { |
| static const char genericSignature[1] = ""; |
| expandBufAddUtf8String(pReply, genericSignature); |
| } |
| expandBufAdd4BE(pReply, MangleAccessFlags(m->GetAccessFlags())); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::OutputDeclaredInterfaces(JDWP::RefTypeId class_id, JDWP::ExpandBuf* pReply) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(class_id, status); |
| if (c == NULL) { |
| return status; |
| } |
| |
| ClassHelper kh(c); |
| size_t interface_count = kh.NumDirectInterfaces(); |
| expandBufAdd4BE(pReply, interface_count); |
| for (size_t i = 0; i < interface_count; ++i) { |
| expandBufAddRefTypeId(pReply, gRegistry->AddRefType(kh.GetDirectInterface(i))); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::OutputLineTable(JDWP::RefTypeId, JDWP::MethodId method_id, JDWP::ExpandBuf* pReply) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| struct DebugCallbackContext { |
| int numItems; |
| JDWP::ExpandBuf* pReply; |
| |
| static bool Callback(void* context, uint32_t address, uint32_t line_number) { |
| DebugCallbackContext* pContext = reinterpret_cast<DebugCallbackContext*>(context); |
| expandBufAdd8BE(pContext->pReply, address); |
| expandBufAdd4BE(pContext->pReply, line_number); |
| pContext->numItems++; |
| return false; |
| } |
| }; |
| mirror::ArtMethod* m = FromMethodId(method_id); |
| MethodHelper mh(m); |
| uint64_t start, end; |
| if (m->IsNative()) { |
| start = -1; |
| end = -1; |
| } else { |
| start = 0; |
| // Return the index of the last instruction |
| end = mh.GetCodeItem()->insns_size_in_code_units_ - 1; |
| } |
| |
| expandBufAdd8BE(pReply, start); |
| expandBufAdd8BE(pReply, end); |
| |
| // Add numLines later |
| size_t numLinesOffset = expandBufGetLength(pReply); |
| expandBufAdd4BE(pReply, 0); |
| |
| DebugCallbackContext context; |
| context.numItems = 0; |
| context.pReply = pReply; |
| |
| mh.GetDexFile().DecodeDebugInfo(mh.GetCodeItem(), m->IsStatic(), m->GetDexMethodIndex(), |
| DebugCallbackContext::Callback, NULL, &context); |
| |
| JDWP::Set4BE(expandBufGetBuffer(pReply) + numLinesOffset, context.numItems); |
| } |
| |
| void Dbg::OutputVariableTable(JDWP::RefTypeId, JDWP::MethodId method_id, bool with_generic, JDWP::ExpandBuf* pReply) { |
| struct DebugCallbackContext { |
| JDWP::ExpandBuf* pReply; |
| size_t variable_count; |
| bool with_generic; |
| |
| static void Callback(void* context, uint16_t slot, uint32_t startAddress, uint32_t endAddress, const char* name, const char* descriptor, const char* signature) { |
| DebugCallbackContext* pContext = reinterpret_cast<DebugCallbackContext*>(context); |
| |
| VLOG(jdwp) << StringPrintf(" %2zd: %d(%d) '%s' '%s' '%s' actual slot=%d mangled slot=%d", pContext->variable_count, startAddress, endAddress - startAddress, name, descriptor, signature, slot, MangleSlot(slot, name)); |
| |
| slot = MangleSlot(slot, name); |
| |
| expandBufAdd8BE(pContext->pReply, startAddress); |
| expandBufAddUtf8String(pContext->pReply, name); |
| expandBufAddUtf8String(pContext->pReply, descriptor); |
| if (pContext->with_generic) { |
| expandBufAddUtf8String(pContext->pReply, signature); |
| } |
| expandBufAdd4BE(pContext->pReply, endAddress - startAddress); |
| expandBufAdd4BE(pContext->pReply, slot); |
| |
| ++pContext->variable_count; |
| } |
| }; |
| mirror::ArtMethod* m = FromMethodId(method_id); |
| MethodHelper mh(m); |
| const DexFile::CodeItem* code_item = mh.GetCodeItem(); |
| |
| // arg_count considers doubles and longs to take 2 units. |
| // variable_count considers everything to take 1 unit. |
| std::string shorty(mh.GetShorty()); |
| expandBufAdd4BE(pReply, mirror::ArtMethod::NumArgRegisters(shorty)); |
| |
| // We don't know the total number of variables yet, so leave a blank and update it later. |
| size_t variable_count_offset = expandBufGetLength(pReply); |
| expandBufAdd4BE(pReply, 0); |
| |
| DebugCallbackContext context; |
| context.pReply = pReply; |
| context.variable_count = 0; |
| context.with_generic = with_generic; |
| |
| mh.GetDexFile().DecodeDebugInfo(code_item, m->IsStatic(), m->GetDexMethodIndex(), NULL, |
| DebugCallbackContext::Callback, &context); |
| |
| JDWP::Set4BE(expandBufGetBuffer(pReply) + variable_count_offset, context.variable_count); |
| } |
| |
| JDWP::JdwpError Dbg::GetBytecodes(JDWP::RefTypeId, JDWP::MethodId method_id, |
| std::vector<uint8_t>& bytecodes) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::ArtMethod* m = FromMethodId(method_id); |
| if (m == NULL) { |
| return JDWP::ERR_INVALID_METHODID; |
| } |
| MethodHelper mh(m); |
| const DexFile::CodeItem* code_item = mh.GetCodeItem(); |
| size_t byte_count = code_item->insns_size_in_code_units_ * 2; |
| const uint8_t* begin = reinterpret_cast<const uint8_t*>(code_item->insns_); |
| const uint8_t* end = begin + byte_count; |
| for (const uint8_t* p = begin; p != end; ++p) { |
| bytecodes.push_back(*p); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpTag Dbg::GetFieldBasicTag(JDWP::FieldId field_id) { |
| return BasicTagFromDescriptor(FieldHelper(FromFieldId(field_id)).GetTypeDescriptor()); |
| } |
| |
| JDWP::JdwpTag Dbg::GetStaticFieldBasicTag(JDWP::FieldId field_id) { |
| return BasicTagFromDescriptor(FieldHelper(FromFieldId(field_id)).GetTypeDescriptor()); |
| } |
| |
| static JDWP::JdwpError GetFieldValueImpl(JDWP::RefTypeId ref_type_id, JDWP::ObjectId object_id, |
| JDWP::FieldId field_id, JDWP::ExpandBuf* pReply, |
| bool is_static) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| JDWP::JdwpError status; |
| mirror::Class* c = DecodeClass(ref_type_id, status); |
| if (ref_type_id != 0 && c == NULL) { |
| return status; |
| } |
| |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id); |
| if ((!is_static && o == NULL) || o == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| mirror::ArtField* f = FromFieldId(field_id); |
| |
| mirror::Class* receiver_class = c; |
| if (receiver_class == NULL && o != NULL) { |
| receiver_class = o->GetClass(); |
| } |
| // TODO: should we give up now if receiver_class is NULL? |
| if (receiver_class != NULL && !f->GetDeclaringClass()->IsAssignableFrom(receiver_class)) { |
| LOG(INFO) << "ERR_INVALID_FIELDID: " << PrettyField(f) << " " << PrettyClass(receiver_class); |
| return JDWP::ERR_INVALID_FIELDID; |
| } |
| |
| // The RI only enforces the static/non-static mismatch in one direction. |
| // TODO: should we change the tests and check both? |
| if (is_static) { |
| if (!f->IsStatic()) { |
| return JDWP::ERR_INVALID_FIELDID; |
| } |
| } else { |
| if (f->IsStatic()) { |
| LOG(WARNING) << "Ignoring non-NULL receiver for ObjectReference.SetValues on static field " << PrettyField(f); |
| } |
| } |
| if (f->IsStatic()) { |
| o = f->GetDeclaringClass(); |
| } |
| |
| JDWP::JdwpTag tag = BasicTagFromDescriptor(FieldHelper(f).GetTypeDescriptor()); |
| |
| if (IsPrimitiveTag(tag)) { |
| expandBufAdd1(pReply, tag); |
| if (tag == JDWP::JT_BOOLEAN || tag == JDWP::JT_BYTE) { |
| expandBufAdd1(pReply, f->Get32(o)); |
| } else if (tag == JDWP::JT_CHAR || tag == JDWP::JT_SHORT) { |
| expandBufAdd2BE(pReply, f->Get32(o)); |
| } else if (tag == JDWP::JT_FLOAT || tag == JDWP::JT_INT) { |
| expandBufAdd4BE(pReply, f->Get32(o)); |
| } else if (tag == JDWP::JT_DOUBLE || tag == JDWP::JT_LONG) { |
| expandBufAdd8BE(pReply, f->Get64(o)); |
| } else { |
| LOG(FATAL) << "Unknown tag: " << tag; |
| } |
| } else { |
| mirror::Object* value = f->GetObject(o); |
| expandBufAdd1(pReply, TagFromObject(value)); |
| expandBufAddObjectId(pReply, gRegistry->Add(value)); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetFieldValue(JDWP::ObjectId object_id, JDWP::FieldId field_id, |
| JDWP::ExpandBuf* pReply) { |
| return GetFieldValueImpl(0, object_id, field_id, pReply, false); |
| } |
| |
| JDWP::JdwpError Dbg::GetStaticFieldValue(JDWP::RefTypeId ref_type_id, JDWP::FieldId field_id, JDWP::ExpandBuf* pReply) { |
| return GetFieldValueImpl(ref_type_id, 0, field_id, pReply, true); |
| } |
| |
| static JDWP::JdwpError SetFieldValueImpl(JDWP::ObjectId object_id, JDWP::FieldId field_id, |
| uint64_t value, int width, bool is_static) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(object_id); |
| if ((!is_static && o == NULL) || o == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| mirror::ArtField* f = FromFieldId(field_id); |
| |
| // The RI only enforces the static/non-static mismatch in one direction. |
| // TODO: should we change the tests and check both? |
| if (is_static) { |
| if (!f->IsStatic()) { |
| return JDWP::ERR_INVALID_FIELDID; |
| } |
| } else { |
| if (f->IsStatic()) { |
| LOG(WARNING) << "Ignoring non-NULL receiver for ObjectReference.SetValues on static field " << PrettyField(f); |
| } |
| } |
| if (f->IsStatic()) { |
| o = f->GetDeclaringClass(); |
| } |
| |
| JDWP::JdwpTag tag = BasicTagFromDescriptor(FieldHelper(f).GetTypeDescriptor()); |
| |
| if (IsPrimitiveTag(tag)) { |
| if (tag == JDWP::JT_DOUBLE || tag == JDWP::JT_LONG) { |
| CHECK_EQ(width, 8); |
| f->Set64(o, value); |
| } else { |
| CHECK_LE(width, 4); |
| f->Set32(o, value); |
| } |
| } else { |
| mirror::Object* v = gRegistry->Get<mirror::Object*>(value); |
| if (v == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| if (v != NULL) { |
| mirror::Class* field_type = FieldHelper(f).GetType(); |
| if (!field_type->IsAssignableFrom(v->GetClass())) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| } |
| f->SetObject(o, v); |
| } |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::SetFieldValue(JDWP::ObjectId object_id, JDWP::FieldId field_id, uint64_t value, |
| int width) { |
| return SetFieldValueImpl(object_id, field_id, value, width, false); |
| } |
| |
| JDWP::JdwpError Dbg::SetStaticFieldValue(JDWP::FieldId field_id, uint64_t value, int width) { |
| return SetFieldValueImpl(0, field_id, value, width, true); |
| } |
| |
| std::string Dbg::StringToUtf8(JDWP::ObjectId string_id) { |
| mirror::String* s = gRegistry->Get<mirror::String*>(string_id); |
| return s->ToModifiedUtf8(); |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadName(JDWP::ObjectId thread_id, std::string& name) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread; |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error != JDWP::ERR_NONE && error != JDWP::ERR_THREAD_NOT_ALIVE) { |
| return error; |
| } |
| |
| // We still need to report the zombie threads' names, so we can't just call Thread::GetThreadName. |
| mirror::Object* thread_object = gRegistry->Get<mirror::Object*>(thread_id); |
| mirror::ArtField* java_lang_Thread_name_field = |
| soa.DecodeField(WellKnownClasses::java_lang_Thread_name); |
| mirror::String* s = |
| reinterpret_cast<mirror::String*>(java_lang_Thread_name_field->GetObject(thread_object)); |
| if (s != NULL) { |
| name = s->ToModifiedUtf8(); |
| } |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadGroup(JDWP::ObjectId thread_id, JDWP::ExpandBuf* pReply) { |
| ScopedObjectAccess soa(Thread::Current()); |
| mirror::Object* thread_object = gRegistry->Get<mirror::Object*>(thread_id); |
| if (thread_object == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| |
| // Okay, so it's an object, but is it actually a thread? |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread; |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error == JDWP::ERR_THREAD_NOT_ALIVE) { |
| // Zombie threads are in the null group. |
| expandBufAddObjectId(pReply, JDWP::ObjectId(0)); |
| return JDWP::ERR_NONE; |
| } |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| |
| mirror::Class* c = Runtime::Current()->GetClassLinker()->FindSystemClass("Ljava/lang/Thread;"); |
| CHECK(c != NULL); |
| mirror::ArtField* f = c->FindInstanceField("group", "Ljava/lang/ThreadGroup;"); |
| CHECK(f != NULL); |
| mirror::Object* group = f->GetObject(thread_object); |
| CHECK(group != NULL); |
| JDWP::ObjectId thread_group_id = gRegistry->Add(group); |
| |
| expandBufAddObjectId(pReply, thread_group_id); |
| return JDWP::ERR_NONE; |
| } |
| |
| std::string Dbg::GetThreadGroupName(JDWP::ObjectId thread_group_id) { |
| ScopedObjectAccess soa(Thread::Current()); |
| mirror::Object* thread_group = gRegistry->Get<mirror::Object*>(thread_group_id); |
| CHECK(thread_group != NULL); |
| |
| mirror::Class* c = Runtime::Current()->GetClassLinker()->FindSystemClass("Ljava/lang/ThreadGroup;"); |
| CHECK(c != NULL); |
| mirror::ArtField* f = c->FindInstanceField("name", "Ljava/lang/String;"); |
| CHECK(f != NULL); |
| mirror::String* s = reinterpret_cast<mirror::String*>(f->GetObject(thread_group)); |
| return s->ToModifiedUtf8(); |
| } |
| |
| JDWP::ObjectId Dbg::GetThreadGroupParent(JDWP::ObjectId thread_group_id) { |
| mirror::Object* thread_group = gRegistry->Get<mirror::Object*>(thread_group_id); |
| CHECK(thread_group != NULL); |
| |
| mirror::Class* c = Runtime::Current()->GetClassLinker()->FindSystemClass("Ljava/lang/ThreadGroup;"); |
| CHECK(c != NULL); |
| mirror::ArtField* f = c->FindInstanceField("parent", "Ljava/lang/ThreadGroup;"); |
| CHECK(f != NULL); |
| mirror::Object* parent = f->GetObject(thread_group); |
| return gRegistry->Add(parent); |
| } |
| |
| JDWP::ObjectId Dbg::GetSystemThreadGroupId() { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| mirror::ArtField* f = soa.DecodeField(WellKnownClasses::java_lang_ThreadGroup_systemThreadGroup); |
| mirror::Object* group = f->GetObject(f->GetDeclaringClass()); |
| return gRegistry->Add(group); |
| } |
| |
| JDWP::ObjectId Dbg::GetMainThreadGroupId() { |
| ScopedObjectAccess soa(Thread::Current()); |
| mirror::ArtField* f = soa.DecodeField(WellKnownClasses::java_lang_ThreadGroup_mainThreadGroup); |
| mirror::Object* group = f->GetObject(f->GetDeclaringClass()); |
| return gRegistry->Add(group); |
| } |
| |
| JDWP::JdwpThreadStatus Dbg::ToJdwpThreadStatus(ThreadState state) { |
| switch (state) { |
| case kBlocked: |
| return JDWP::TS_MONITOR; |
| case kNative: |
| case kRunnable: |
| case kSuspended: |
| return JDWP::TS_RUNNING; |
| case kSleeping: |
| return JDWP::TS_SLEEPING; |
| case kStarting: |
| case kTerminated: |
| return JDWP::TS_ZOMBIE; |
| case kTimedWaiting: |
| case kWaitingForDebuggerSend: |
| case kWaitingForDebuggerSuspension: |
| case kWaitingForDebuggerToAttach: |
| case kWaitingForGcToComplete: |
| case kWaitingForCheckPointsToRun: |
| case kWaitingForJniOnLoad: |
| case kWaitingForSignalCatcherOutput: |
| case kWaitingInMainDebuggerLoop: |
| case kWaitingInMainSignalCatcherLoop: |
| case kWaitingPerformingGc: |
| case kWaiting: |
| return JDWP::TS_WAIT; |
| // Don't add a 'default' here so the compiler can spot incompatible enum changes. |
| } |
| LOG(FATAL) << "Unknown thread state: " << state; |
| return JDWP::TS_ZOMBIE; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadStatus(JDWP::ObjectId thread_id, JDWP::JdwpThreadStatus* pThreadStatus, JDWP::JdwpSuspendStatus* pSuspendStatus) { |
| ScopedObjectAccess soa(Thread::Current()); |
| |
| *pSuspendStatus = JDWP::SUSPEND_STATUS_NOT_SUSPENDED; |
| |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread; |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error != JDWP::ERR_NONE) { |
| if (error == JDWP::ERR_THREAD_NOT_ALIVE) { |
| *pThreadStatus = JDWP::TS_ZOMBIE; |
| return JDWP::ERR_NONE; |
| } |
| return error; |
| } |
| |
| if (IsSuspendedForDebugger(soa, thread)) { |
| *pSuspendStatus = JDWP::SUSPEND_STATUS_SUSPENDED; |
| } |
| |
| *pThreadStatus = ToJdwpThreadStatus(thread->GetState()); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadDebugSuspendCount(JDWP::ObjectId thread_id, JDWP::ExpandBuf* pReply) { |
| ScopedObjectAccess soa(Thread::Current()); |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread; |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| MutexLock mu2(soa.Self(), *Locks::thread_suspend_count_lock_); |
| expandBufAdd4BE(pReply, thread->GetDebugSuspendCount()); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::Interrupt(JDWP::ObjectId thread_id) { |
| ScopedObjectAccess soa(Thread::Current()); |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread; |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| thread->Interrupt(); |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::GetThreads(JDWP::ObjectId thread_group_id, std::vector<JDWP::ObjectId>& thread_ids) { |
| class ThreadListVisitor { |
| public: |
| ThreadListVisitor(const ScopedObjectAccessUnchecked& soa, mirror::Object* desired_thread_group, |
| std::vector<JDWP::ObjectId>& thread_ids) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| : soa_(soa), desired_thread_group_(desired_thread_group), thread_ids_(thread_ids) {} |
| |
| static void Visit(Thread* t, void* arg) { |
| reinterpret_cast<ThreadListVisitor*>(arg)->Visit(t); |
| } |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| void Visit(Thread* t) NO_THREAD_SAFETY_ANALYSIS { |
| if (t == Dbg::GetDebugThread()) { |
| // Skip the JDWP thread. Some debuggers get bent out of shape when they can't suspend and |
| // query all threads, so it's easier if we just don't tell them about this thread. |
| return; |
| } |
| mirror::Object* peer = t->GetPeer(); |
| if (IsInDesiredThreadGroup(peer)) { |
| thread_ids_.push_back(gRegistry->Add(peer)); |
| } |
| } |
| |
| private: |
| bool IsInDesiredThreadGroup(mirror::Object* peer) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| // peer might be NULL if the thread is still starting up. |
| if (peer == NULL) { |
| // We can't tell the debugger about this thread yet. |
| // TODO: if we identified threads to the debugger by their Thread* |
| // rather than their peer's mirror::Object*, we could fix this. |
| // Doing so might help us report ZOMBIE threads too. |
| return false; |
| } |
| // Do we want threads from all thread groups? |
| if (desired_thread_group_ == NULL) { |
| return true; |
| } |
| mirror::Object* group = soa_.DecodeField(WellKnownClasses::java_lang_Thread_group)->GetObject(peer); |
| return (group == desired_thread_group_); |
| } |
| |
| const ScopedObjectAccessUnchecked& soa_; |
| mirror::Object* const desired_thread_group_; |
| std::vector<JDWP::ObjectId>& thread_ids_; |
| }; |
| |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| mirror::Object* thread_group = gRegistry->Get<mirror::Object*>(thread_group_id); |
| ThreadListVisitor tlv(soa, thread_group, thread_ids); |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Runtime::Current()->GetThreadList()->ForEach(ThreadListVisitor::Visit, &tlv); |
| } |
| |
| void Dbg::GetChildThreadGroups(JDWP::ObjectId thread_group_id, std::vector<JDWP::ObjectId>& child_thread_group_ids) { |
| ScopedObjectAccess soa(Thread::Current()); |
| mirror::Object* thread_group = gRegistry->Get<mirror::Object*>(thread_group_id); |
| |
| // Get the ArrayList<ThreadGroup> "groups" out of this thread group... |
| mirror::ArtField* groups_field = thread_group->GetClass()->FindInstanceField("groups", "Ljava/util/List;"); |
| mirror::Object* groups_array_list = groups_field->GetObject(thread_group); |
| |
| // Get the array and size out of the ArrayList<ThreadGroup>... |
| mirror::ArtField* array_field = groups_array_list->GetClass()->FindInstanceField("array", "[Ljava/lang/Object;"); |
| mirror::ArtField* size_field = groups_array_list->GetClass()->FindInstanceField("size", "I"); |
| mirror::ObjectArray<mirror::Object>* groups_array = |
| array_field->GetObject(groups_array_list)->AsObjectArray<mirror::Object>(); |
| const int32_t size = size_field->GetInt(groups_array_list); |
| |
| // Copy the first 'size' elements out of the array into the result. |
| for (int32_t i = 0; i < size; ++i) { |
| child_thread_group_ids.push_back(gRegistry->Add(groups_array->Get(i))); |
| } |
| } |
| |
| static int GetStackDepth(Thread* thread) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| struct CountStackDepthVisitor : public StackVisitor { |
| explicit CountStackDepthVisitor(Thread* thread) |
| : StackVisitor(thread, NULL), depth(0) {} |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| if (!GetMethod()->IsRuntimeMethod()) { |
| ++depth; |
| } |
| return true; |
| } |
| size_t depth; |
| }; |
| |
| CountStackDepthVisitor visitor(thread); |
| visitor.WalkStack(); |
| return visitor.depth; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadFrameCount(JDWP::ObjectId thread_id, size_t& result) { |
| ScopedObjectAccess soa(Thread::Current()); |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread; |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| result = GetStackDepth(thread); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::JdwpError Dbg::GetThreadFrames(JDWP::ObjectId thread_id, size_t start_frame, |
| size_t frame_count, JDWP::ExpandBuf* buf) { |
| class GetFrameVisitor : public StackVisitor { |
| public: |
| GetFrameVisitor(Thread* thread, size_t start_frame, size_t frame_count, JDWP::ExpandBuf* buf) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| : StackVisitor(thread, NULL), depth_(0), |
| start_frame_(start_frame), frame_count_(frame_count), buf_(buf) { |
| expandBufAdd4BE(buf_, frame_count_); |
| } |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| virtual bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| if (GetMethod()->IsRuntimeMethod()) { |
| return true; // The debugger can't do anything useful with a frame that has no Method*. |
| } |
| if (depth_ >= start_frame_ + frame_count_) { |
| return false; |
| } |
| if (depth_ >= start_frame_) { |
| JDWP::FrameId frame_id(GetFrameId()); |
| JDWP::JdwpLocation location; |
| SetLocation(location, GetMethod(), GetDexPc()); |
| VLOG(jdwp) << StringPrintf(" Frame %3zd: id=%3lld ", depth_, frame_id) << location; |
| expandBufAdd8BE(buf_, frame_id); |
| expandBufAddLocation(buf_, location); |
| } |
| ++depth_; |
| return true; |
| } |
| |
| private: |
| size_t depth_; |
| const size_t start_frame_; |
| const size_t frame_count_; |
| JDWP::ExpandBuf* buf_; |
| }; |
| |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread; |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| GetFrameVisitor visitor(thread, start_frame, frame_count, buf); |
| visitor.WalkStack(); |
| return JDWP::ERR_NONE; |
| } |
| |
| JDWP::ObjectId Dbg::GetThreadSelfId() { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| return gRegistry->Add(soa.Self()->GetPeer()); |
| } |
| |
| void Dbg::SuspendVM() { |
| Runtime::Current()->GetThreadList()->SuspendAllForDebugger(); |
| } |
| |
| void Dbg::ResumeVM() { |
| Runtime::Current()->GetThreadList()->UndoDebuggerSuspensions(); |
| } |
| |
| JDWP::JdwpError Dbg::SuspendThread(JDWP::ObjectId thread_id, bool request_suspension) { |
| ScopedLocalRef<jobject> peer(Thread::Current()->GetJniEnv(), NULL); |
| { |
| ScopedObjectAccess soa(Thread::Current()); |
| peer.reset(soa.AddLocalReference<jobject>(gRegistry->Get<mirror::Object*>(thread_id))); |
| } |
| if (peer.get() == NULL) { |
| return JDWP::ERR_THREAD_NOT_ALIVE; |
| } |
| // Suspend thread to build stack trace. |
| bool timed_out; |
| Thread* thread = ThreadList::SuspendThreadByPeer(peer.get(), request_suspension, true, |
| &timed_out); |
| if (thread != NULL) { |
| return JDWP::ERR_NONE; |
| } else if (timed_out) { |
| return JDWP::ERR_INTERNAL; |
| } else { |
| return JDWP::ERR_THREAD_NOT_ALIVE; |
| } |
| } |
| |
| void Dbg::ResumeThread(JDWP::ObjectId thread_id) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| mirror::Object* peer = gRegistry->Get<mirror::Object*>(thread_id); |
| Thread* thread; |
| { |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| thread = Thread::FromManagedThread(soa, peer); |
| } |
| if (thread == NULL) { |
| LOG(WARNING) << "No such thread for resume: " << peer; |
| return; |
| } |
| bool needs_resume; |
| { |
| MutexLock mu2(soa.Self(), *Locks::thread_suspend_count_lock_); |
| needs_resume = thread->GetSuspendCount() > 0; |
| } |
| if (needs_resume) { |
| Runtime::Current()->GetThreadList()->Resume(thread, true); |
| } |
| } |
| |
| void Dbg::SuspendSelf() { |
| Runtime::Current()->GetThreadList()->SuspendSelfForDebugger(); |
| } |
| |
| struct GetThisVisitor : public StackVisitor { |
| GetThisVisitor(Thread* thread, Context* context, JDWP::FrameId frame_id) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| : StackVisitor(thread, context), this_object(NULL), frame_id(frame_id) {} |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| virtual bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| if (frame_id != GetFrameId()) { |
| return true; // continue |
| } else { |
| this_object = GetThisObject(); |
| return false; |
| } |
| } |
| |
| mirror::Object* this_object; |
| JDWP::FrameId frame_id; |
| }; |
| |
| JDWP::JdwpError Dbg::GetThisObject(JDWP::ObjectId thread_id, JDWP::FrameId frame_id, |
| JDWP::ObjectId* result) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| Thread* thread; |
| { |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error != JDWP::ERR_NONE) { |
| return error; |
| } |
| if (!IsSuspendedForDebugger(soa, thread)) { |
| return JDWP::ERR_THREAD_NOT_SUSPENDED; |
| } |
| } |
| UniquePtr<Context> context(Context::Create()); |
| GetThisVisitor visitor(thread, context.get(), frame_id); |
| visitor.WalkStack(); |
| *result = gRegistry->Add(visitor.this_object); |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::GetLocalValue(JDWP::ObjectId thread_id, JDWP::FrameId frame_id, int slot, JDWP::JdwpTag tag, |
| uint8_t* buf, size_t width) { |
| struct GetLocalVisitor : public StackVisitor { |
| GetLocalVisitor(Thread* thread, Context* context, JDWP::FrameId frame_id, int slot, |
| JDWP::JdwpTag tag, uint8_t* buf, size_t width) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| : StackVisitor(thread, context), frame_id_(frame_id), slot_(slot), tag_(tag), |
| buf_(buf), width_(width) {} |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| if (GetFrameId() != frame_id_) { |
| return true; // Not our frame, carry on. |
| } |
| // TODO: check that the tag is compatible with the actual type of the slot! |
| mirror::ArtMethod* m = GetMethod(); |
| uint16_t reg = DemangleSlot(slot_, m); |
| |
| switch (tag_) { |
| case JDWP::JT_BOOLEAN: |
| { |
| CHECK_EQ(width_, 1U); |
| uint32_t intVal = GetVReg(m, reg, kIntVReg); |
| VLOG(jdwp) << "get boolean local " << reg << " = " << intVal; |
| JDWP::Set1(buf_+1, intVal != 0); |
| } |
| break; |
| case JDWP::JT_BYTE: |
| { |
| CHECK_EQ(width_, 1U); |
| uint32_t intVal = GetVReg(m, reg, kIntVReg); |
| VLOG(jdwp) << "get byte local " << reg << " = " << intVal; |
| JDWP::Set1(buf_+1, intVal); |
| } |
| break; |
| case JDWP::JT_SHORT: |
| case JDWP::JT_CHAR: |
| { |
| CHECK_EQ(width_, 2U); |
| uint32_t intVal = GetVReg(m, reg, kIntVReg); |
| VLOG(jdwp) << "get short/char local " << reg << " = " << intVal; |
| JDWP::Set2BE(buf_+1, intVal); |
| } |
| break; |
| case JDWP::JT_INT: |
| { |
| CHECK_EQ(width_, 4U); |
| uint32_t intVal = GetVReg(m, reg, kIntVReg); |
| VLOG(jdwp) << "get int local " << reg << " = " << intVal; |
| JDWP::Set4BE(buf_+1, intVal); |
| } |
| break; |
| case JDWP::JT_FLOAT: |
| { |
| CHECK_EQ(width_, 4U); |
| uint32_t intVal = GetVReg(m, reg, kFloatVReg); |
| VLOG(jdwp) << "get int/float local " << reg << " = " << intVal; |
| JDWP::Set4BE(buf_+1, intVal); |
| } |
| break; |
| case JDWP::JT_ARRAY: |
| { |
| CHECK_EQ(width_, sizeof(JDWP::ObjectId)); |
| mirror::Object* o = reinterpret_cast<mirror::Object*>(GetVReg(m, reg, kReferenceVReg)); |
| VLOG(jdwp) << "get array local " << reg << " = " << o; |
| if (!Runtime::Current()->GetHeap()->IsValidObjectAddress(o)) { |
| LOG(FATAL) << "Register " << reg << " expected to hold array: " << o; |
| } |
| JDWP::SetObjectId(buf_+1, gRegistry->Add(o)); |
| } |
| break; |
| case JDWP::JT_CLASS_LOADER: |
| case JDWP::JT_CLASS_OBJECT: |
| case JDWP::JT_OBJECT: |
| case JDWP::JT_STRING: |
| case JDWP::JT_THREAD: |
| case JDWP::JT_THREAD_GROUP: |
| { |
| CHECK_EQ(width_, sizeof(JDWP::ObjectId)); |
| mirror::Object* o = reinterpret_cast<mirror::Object*>(GetVReg(m, reg, kReferenceVReg)); |
| VLOG(jdwp) << "get object local " << reg << " = " << o; |
| if (!Runtime::Current()->GetHeap()->IsValidObjectAddress(o)) { |
| LOG(FATAL) << "Register " << reg << " expected to hold object: " << o; |
| } |
| tag_ = TagFromObject(o); |
| JDWP::SetObjectId(buf_+1, gRegistry->Add(o)); |
| } |
| break; |
| case JDWP::JT_DOUBLE: |
| { |
| CHECK_EQ(width_, 8U); |
| uint32_t lo = GetVReg(m, reg, kDoubleLoVReg); |
| uint64_t hi = GetVReg(m, reg + 1, kDoubleHiVReg); |
| uint64_t longVal = (hi << 32) | lo; |
| VLOG(jdwp) << "get double/long local " << hi << ":" << lo << " = " << longVal; |
| JDWP::Set8BE(buf_+1, longVal); |
| } |
| break; |
| case JDWP::JT_LONG: |
| { |
| CHECK_EQ(width_, 8U); |
| uint32_t lo = GetVReg(m, reg, kLongLoVReg); |
| uint64_t hi = GetVReg(m, reg + 1, kLongHiVReg); |
| uint64_t longVal = (hi << 32) | lo; |
| VLOG(jdwp) << "get double/long local " << hi << ":" << lo << " = " << longVal; |
| JDWP::Set8BE(buf_+1, longVal); |
| } |
| break; |
| default: |
| LOG(FATAL) << "Unknown tag " << tag_; |
| break; |
| } |
| |
| // Prepend tag, which may have been updated. |
| JDWP::Set1(buf_, tag_); |
| return false; |
| } |
| |
| const JDWP::FrameId frame_id_; |
| const int slot_; |
| JDWP::JdwpTag tag_; |
| uint8_t* const buf_; |
| const size_t width_; |
| }; |
| |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread; |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error != JDWP::ERR_NONE) { |
| return; |
| } |
| UniquePtr<Context> context(Context::Create()); |
| GetLocalVisitor visitor(thread, context.get(), frame_id, slot, tag, buf, width); |
| visitor.WalkStack(); |
| } |
| |
| void Dbg::SetLocalValue(JDWP::ObjectId thread_id, JDWP::FrameId frame_id, int slot, JDWP::JdwpTag tag, |
| uint64_t value, size_t width) { |
| struct SetLocalVisitor : public StackVisitor { |
| SetLocalVisitor(Thread* thread, Context* context, |
| JDWP::FrameId frame_id, int slot, JDWP::JdwpTag tag, uint64_t value, |
| size_t width) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| : StackVisitor(thread, context), |
| frame_id_(frame_id), slot_(slot), tag_(tag), value_(value), width_(width) {} |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| if (GetFrameId() != frame_id_) { |
| return true; // Not our frame, carry on. |
| } |
| // TODO: check that the tag is compatible with the actual type of the slot! |
| mirror::ArtMethod* m = GetMethod(); |
| uint16_t reg = DemangleSlot(slot_, m); |
| |
| switch (tag_) { |
| case JDWP::JT_BOOLEAN: |
| case JDWP::JT_BYTE: |
| CHECK_EQ(width_, 1U); |
| SetVReg(m, reg, static_cast<uint32_t>(value_), kIntVReg); |
| break; |
| case JDWP::JT_SHORT: |
| case JDWP::JT_CHAR: |
| CHECK_EQ(width_, 2U); |
| SetVReg(m, reg, static_cast<uint32_t>(value_), kIntVReg); |
| break; |
| case JDWP::JT_INT: |
| CHECK_EQ(width_, 4U); |
| SetVReg(m, reg, static_cast<uint32_t>(value_), kIntVReg); |
| break; |
| case JDWP::JT_FLOAT: |
| CHECK_EQ(width_, 4U); |
| SetVReg(m, reg, static_cast<uint32_t>(value_), kFloatVReg); |
| break; |
| case JDWP::JT_ARRAY: |
| case JDWP::JT_OBJECT: |
| case JDWP::JT_STRING: |
| { |
| CHECK_EQ(width_, sizeof(JDWP::ObjectId)); |
| mirror::Object* o = gRegistry->Get<mirror::Object*>(static_cast<JDWP::ObjectId>(value_)); |
| if (o == ObjectRegistry::kInvalidObject) { |
| UNIMPLEMENTED(FATAL) << "return an error code when given an invalid object to store"; |
| } |
| SetVReg(m, reg, static_cast<uint32_t>(reinterpret_cast<uintptr_t>(o)), kReferenceVReg); |
| } |
| break; |
| case JDWP::JT_DOUBLE: |
| CHECK_EQ(width_, 8U); |
| SetVReg(m, reg, static_cast<uint32_t>(value_), kDoubleLoVReg); |
| SetVReg(m, reg + 1, static_cast<uint32_t>(value_ >> 32), kDoubleHiVReg); |
| break; |
| case JDWP::JT_LONG: |
| CHECK_EQ(width_, 8U); |
| SetVReg(m, reg, static_cast<uint32_t>(value_), kLongLoVReg); |
| SetVReg(m, reg + 1, static_cast<uint32_t>(value_ >> 32), kLongHiVReg); |
| break; |
| default: |
| LOG(FATAL) << "Unknown tag " << tag_; |
| break; |
| } |
| return false; |
| } |
| |
| const JDWP::FrameId frame_id_; |
| const int slot_; |
| const JDWP::JdwpTag tag_; |
| const uint64_t value_; |
| const size_t width_; |
| }; |
| |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| Thread* thread; |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, thread); |
| if (error != JDWP::ERR_NONE) { |
| return; |
| } |
| UniquePtr<Context> context(Context::Create()); |
| SetLocalVisitor visitor(thread, context.get(), frame_id, slot, tag, value, width); |
| visitor.WalkStack(); |
| } |
| |
| void Dbg::PostLocationEvent(const mirror::ArtMethod* m, int dex_pc, |
| mirror::Object* this_object, int event_flags) { |
| mirror::Class* c = m->GetDeclaringClass(); |
| |
| JDWP::JdwpLocation location; |
| location.type_tag = c->IsInterface() ? JDWP::TT_INTERFACE : JDWP::TT_CLASS; |
| location.class_id = gRegistry->AddRefType(c); |
| location.method_id = ToMethodId(m); |
| location.dex_pc = m->IsNative() ? -1 : dex_pc; |
| |
| // If 'this_object' isn't already in the registry, we know that we're not looking for it, |
| // so there's no point adding it to the registry and burning through ids. |
| JDWP::ObjectId this_id = 0; |
| if (gRegistry->Contains(this_object)) { |
| this_id = gRegistry->Add(this_object); |
| } |
| gJdwpState->PostLocationEvent(&location, this_id, event_flags); |
| } |
| |
| void Dbg::PostException(Thread* thread, const ThrowLocation& throw_location, |
| mirror::ArtMethod* catch_method, |
| uint32_t catch_dex_pc, mirror::Throwable* exception_object) { |
| if (!IsDebuggerActive()) { |
| return; |
| } |
| |
| JDWP::JdwpLocation jdwp_throw_location; |
| SetLocation(jdwp_throw_location, throw_location.GetMethod(), throw_location.GetDexPc()); |
| JDWP::JdwpLocation catch_location; |
| SetLocation(catch_location, catch_method, catch_dex_pc); |
| |
| // We need 'this' for InstanceOnly filters. |
| JDWP::ObjectId this_id = gRegistry->Add(throw_location.GetThis()); |
| JDWP::ObjectId exception_id = gRegistry->Add(exception_object); |
| JDWP::RefTypeId exception_class_id = gRegistry->AddRefType(exception_object->GetClass()); |
| |
| gJdwpState->PostException(&jdwp_throw_location, exception_id, exception_class_id, &catch_location, |
| this_id); |
| } |
| |
| void Dbg::PostClassPrepare(mirror::Class* c) { |
| if (!IsDebuggerActive()) { |
| return; |
| } |
| |
| // OLD-TODO - we currently always send both "verified" and "prepared" since |
| // debuggers seem to like that. There might be some advantage to honesty, |
| // since the class may not yet be verified. |
| int state = JDWP::CS_VERIFIED | JDWP::CS_PREPARED; |
| JDWP::JdwpTypeTag tag = c->IsInterface() ? JDWP::TT_INTERFACE : JDWP::TT_CLASS; |
| gJdwpState->PostClassPrepare(tag, gRegistry->Add(c), |
| ClassHelper(c).GetDescriptor(), state); |
| } |
| |
| void Dbg::UpdateDebugger(Thread* thread, mirror::Object* this_object, |
| const mirror::ArtMethod* m, uint32_t dex_pc) { |
| if (!IsDebuggerActive() || dex_pc == static_cast<uint32_t>(-2) /* fake method exit */) { |
| return; |
| } |
| |
| int event_flags = 0; |
| |
| if (IsBreakpoint(m, dex_pc)) { |
| event_flags |= kBreakpoint; |
| } |
| |
| { |
| // If the debugger is single-stepping one of our threads, check to |
| // see if we're that thread and we've reached a step point. |
| MutexLock mu(Thread::Current(), *Locks::breakpoint_lock_); |
| if (gSingleStepControl.is_active && gSingleStepControl.thread == thread) { |
| CHECK(!m->IsNative()); |
| if (gSingleStepControl.step_depth == JDWP::SD_INTO) { |
| // Step into method calls. We break when the line number |
| // or method pointer changes. If we're in SS_MIN mode, we |
| // always stop. |
| if (gSingleStepControl.method != m) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS new method"; |
| } else if (gSingleStepControl.step_size == JDWP::SS_MIN) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS new instruction"; |
| } else if (gSingleStepControl.dex_pcs.find(dex_pc) == gSingleStepControl.dex_pcs.end()) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS new line"; |
| } |
| } else if (gSingleStepControl.step_depth == JDWP::SD_OVER) { |
| // Step over method calls. We break when the line number is |
| // different and the frame depth is <= the original frame |
| // depth. (We can't just compare on the method, because we |
| // might get unrolled past it by an exception, and it's tricky |
| // to identify recursion.) |
| |
| int stack_depth = GetStackDepth(thread); |
| |
| if (stack_depth < gSingleStepControl.stack_depth) { |
| // popped up one or more frames, always trigger |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS method pop"; |
| } else if (stack_depth == gSingleStepControl.stack_depth) { |
| // same depth, see if we moved |
| if (gSingleStepControl.step_size == JDWP::SS_MIN) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS new instruction"; |
| } else if (gSingleStepControl.dex_pcs.find(dex_pc) == gSingleStepControl.dex_pcs.end()) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS new line"; |
| } |
| } |
| } else { |
| CHECK_EQ(gSingleStepControl.step_depth, JDWP::SD_OUT); |
| // Return from the current method. We break when the frame |
| // depth pops up. |
| |
| // This differs from the "method exit" break in that it stops |
| // with the PC at the next instruction in the returned-to |
| // function, rather than the end of the returning function. |
| |
| int stack_depth = GetStackDepth(thread); |
| if (stack_depth < gSingleStepControl.stack_depth) { |
| event_flags |= kSingleStep; |
| VLOG(jdwp) << "SS method pop"; |
| } |
| } |
| } |
| } |
| |
| // If there's something interesting going on, see if it matches one |
| // of the debugger filters. |
| if (event_flags != 0) { |
| Dbg::PostLocationEvent(m, dex_pc, this_object, event_flags); |
| } |
| } |
| |
| void Dbg::WatchLocation(const JDWP::JdwpLocation* location) { |
| MutexLock mu(Thread::Current(), *Locks::breakpoint_lock_); |
| mirror::ArtMethod* m = FromMethodId(location->method_id); |
| gBreakpoints.push_back(Breakpoint(m, location->dex_pc)); |
| VLOG(jdwp) << "Set breakpoint #" << (gBreakpoints.size() - 1) << ": " << gBreakpoints[gBreakpoints.size() - 1]; |
| } |
| |
| void Dbg::UnwatchLocation(const JDWP::JdwpLocation* location) { |
| MutexLock mu(Thread::Current(), *Locks::breakpoint_lock_); |
| mirror::ArtMethod* m = FromMethodId(location->method_id); |
| for (size_t i = 0; i < gBreakpoints.size(); ++i) { |
| if (gBreakpoints[i].method == m && gBreakpoints[i].dex_pc == location->dex_pc) { |
| VLOG(jdwp) << "Removed breakpoint #" << i << ": " << gBreakpoints[i]; |
| gBreakpoints.erase(gBreakpoints.begin() + i); |
| return; |
| } |
| } |
| } |
| |
| // Scoped utility class to suspend a thread so that we may do tasks such as walk its stack. Doesn't |
| // cause suspension if the thread is the current thread. |
| class ScopedThreadSuspension { |
| public: |
| ScopedThreadSuspension(Thread* self, JDWP::ObjectId thread_id) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) : |
| thread_(NULL), |
| error_(JDWP::ERR_NONE), |
| self_suspend_(false), |
| other_suspend_(false) { |
| ScopedObjectAccessUnchecked soa(self); |
| { |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| error_ = DecodeThread(soa, thread_id, thread_); |
| } |
| if (error_ == JDWP::ERR_NONE) { |
| if (thread_ == soa.Self()) { |
| self_suspend_ = true; |
| } else { |
| soa.Self()->TransitionFromRunnableToSuspended(kWaitingForDebuggerSuspension); |
| jobject thread_peer = gRegistry->GetJObject(thread_id); |
| bool timed_out; |
| Thread* suspended_thread = ThreadList::SuspendThreadByPeer(thread_peer, true, true, |
| &timed_out); |
| CHECK_EQ(soa.Self()->TransitionFromSuspendedToRunnable(), kWaitingForDebuggerSuspension); |
| if (suspended_thread == NULL) { |
| // Thread terminated from under us while suspending. |
| error_ = JDWP::ERR_INVALID_THREAD; |
| } else { |
| CHECK_EQ(suspended_thread, thread_); |
| other_suspend_ = true; |
| } |
| } |
| } |
| } |
| |
| Thread* GetThread() const { |
| return thread_; |
| } |
| |
| JDWP::JdwpError GetError() const { |
| return error_; |
| } |
| |
| ~ScopedThreadSuspension() { |
| if (other_suspend_) { |
| Runtime::Current()->GetThreadList()->Resume(thread_, true); |
| } |
| } |
| |
| private: |
| Thread* thread_; |
| JDWP::JdwpError error_; |
| bool self_suspend_; |
| bool other_suspend_; |
| }; |
| |
| JDWP::JdwpError Dbg::ConfigureStep(JDWP::ObjectId thread_id, JDWP::JdwpStepSize step_size, |
| JDWP::JdwpStepDepth step_depth) { |
| Thread* self = Thread::Current(); |
| ScopedThreadSuspension sts(self, thread_id); |
| if (sts.GetError() != JDWP::ERR_NONE) { |
| return sts.GetError(); |
| } |
| |
| MutexLock mu2(self, *Locks::breakpoint_lock_); |
| // TODO: there's no theoretical reason why we couldn't support single-stepping |
| // of multiple threads at once, but we never did so historically. |
| if (gSingleStepControl.thread != NULL && sts.GetThread() != gSingleStepControl.thread) { |
| LOG(WARNING) << "single-step already active for " << *gSingleStepControl.thread |
| << "; switching to " << *sts.GetThread(); |
| } |
| |
| // |
| // Work out what Method* we're in, the current line number, and how deep the stack currently |
| // is for step-out. |
| // |
| |
| struct SingleStepStackVisitor : public StackVisitor { |
| explicit SingleStepStackVisitor(Thread* thread) |
| EXCLUSIVE_LOCKS_REQUIRED(Locks::breakpoint_lock_) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| : StackVisitor(thread, NULL) { |
| gSingleStepControl.method = NULL; |
| gSingleStepControl.stack_depth = 0; |
| } |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| Locks::breakpoint_lock_->AssertHeld(Thread::Current()); |
| const mirror::ArtMethod* m = GetMethod(); |
| if (!m->IsRuntimeMethod()) { |
| ++gSingleStepControl.stack_depth; |
| if (gSingleStepControl.method == NULL) { |
| const mirror::DexCache* dex_cache = m->GetDeclaringClass()->GetDexCache(); |
| gSingleStepControl.method = m; |
| gSingleStepControl.line_number = -1; |
| if (dex_cache != NULL) { |
| const DexFile& dex_file = *dex_cache->GetDexFile(); |
| gSingleStepControl.line_number = dex_file.GetLineNumFromPC(m, GetDexPc()); |
| } |
| } |
| } |
| return true; |
| } |
| }; |
| |
| SingleStepStackVisitor visitor(sts.GetThread()); |
| visitor.WalkStack(); |
| |
| // |
| // Find the dex_pc values that correspond to the current line, for line-based single-stepping. |
| // |
| |
| struct DebugCallbackContext { |
| DebugCallbackContext() EXCLUSIVE_LOCKS_REQUIRED(Locks::breakpoint_lock_) { |
| last_pc_valid = false; |
| last_pc = 0; |
| } |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| static bool Callback(void* raw_context, uint32_t address, uint32_t line_number) NO_THREAD_SAFETY_ANALYSIS { |
| Locks::breakpoint_lock_->AssertHeld(Thread::Current()); |
| DebugCallbackContext* context = reinterpret_cast<DebugCallbackContext*>(raw_context); |
| if (static_cast<int32_t>(line_number) == gSingleStepControl.line_number) { |
| if (!context->last_pc_valid) { |
| // Everything from this address until the next line change is ours. |
| context->last_pc = address; |
| context->last_pc_valid = true; |
| } |
| // Otherwise, if we're already in a valid range for this line, |
| // just keep going (shouldn't really happen)... |
| } else if (context->last_pc_valid) { // and the line number is new |
| // Add everything from the last entry up until here to the set |
| for (uint32_t dex_pc = context->last_pc; dex_pc < address; ++dex_pc) { |
| gSingleStepControl.dex_pcs.insert(dex_pc); |
| } |
| context->last_pc_valid = false; |
| } |
| return false; // There may be multiple entries for any given line. |
| } |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| ~DebugCallbackContext() NO_THREAD_SAFETY_ANALYSIS { |
| Locks::breakpoint_lock_->AssertHeld(Thread::Current()); |
| // If the line number was the last in the position table... |
| if (last_pc_valid) { |
| size_t end = MethodHelper(gSingleStepControl.method).GetCodeItem()->insns_size_in_code_units_; |
| for (uint32_t dex_pc = last_pc; dex_pc < end; ++dex_pc) { |
| gSingleStepControl.dex_pcs.insert(dex_pc); |
| } |
| } |
| } |
| |
| bool last_pc_valid; |
| uint32_t last_pc; |
| }; |
| gSingleStepControl.dex_pcs.clear(); |
| const mirror::ArtMethod* m = gSingleStepControl.method; |
| if (m->IsNative()) { |
| gSingleStepControl.line_number = -1; |
| } else { |
| DebugCallbackContext context; |
| MethodHelper mh(m); |
| mh.GetDexFile().DecodeDebugInfo(mh.GetCodeItem(), m->IsStatic(), m->GetDexMethodIndex(), |
| DebugCallbackContext::Callback, NULL, &context); |
| } |
| |
| // |
| // Everything else... |
| // |
| |
| gSingleStepControl.thread = sts.GetThread(); |
| gSingleStepControl.step_size = step_size; |
| gSingleStepControl.step_depth = step_depth; |
| gSingleStepControl.is_active = true; |
| |
| if (VLOG_IS_ON(jdwp)) { |
| VLOG(jdwp) << "Single-step thread: " << *gSingleStepControl.thread; |
| VLOG(jdwp) << "Single-step step size: " << gSingleStepControl.step_size; |
| VLOG(jdwp) << "Single-step step depth: " << gSingleStepControl.step_depth; |
| VLOG(jdwp) << "Single-step current method: " << PrettyMethod(gSingleStepControl.method); |
| VLOG(jdwp) << "Single-step current line: " << gSingleStepControl.line_number; |
| VLOG(jdwp) << "Single-step current stack depth: " << gSingleStepControl.stack_depth; |
| VLOG(jdwp) << "Single-step dex_pc values:"; |
| for (std::set<uint32_t>::iterator it = gSingleStepControl.dex_pcs.begin() ; it != gSingleStepControl.dex_pcs.end(); ++it) { |
| VLOG(jdwp) << StringPrintf(" %#x", *it); |
| } |
| } |
| |
| return JDWP::ERR_NONE; |
| } |
| |
| void Dbg::UnconfigureStep(JDWP::ObjectId /*thread_id*/) { |
| MutexLock mu(Thread::Current(), *Locks::breakpoint_lock_); |
| |
| gSingleStepControl.is_active = false; |
| gSingleStepControl.thread = NULL; |
| gSingleStepControl.dex_pcs.clear(); |
| } |
| |
| static char JdwpTagToShortyChar(JDWP::JdwpTag tag) { |
| switch (tag) { |
| default: |
| LOG(FATAL) << "unknown JDWP tag: " << PrintableChar(tag); |
| |
| // Primitives. |
| case JDWP::JT_BYTE: return 'B'; |
| case JDWP::JT_CHAR: return 'C'; |
| case JDWP::JT_FLOAT: return 'F'; |
| case JDWP::JT_DOUBLE: return 'D'; |
| case JDWP::JT_INT: return 'I'; |
| case JDWP::JT_LONG: return 'J'; |
| case JDWP::JT_SHORT: return 'S'; |
| case JDWP::JT_VOID: return 'V'; |
| case JDWP::JT_BOOLEAN: return 'Z'; |
| |
| // Reference types. |
| case JDWP::JT_ARRAY: |
| case JDWP::JT_OBJECT: |
| case JDWP::JT_STRING: |
| case JDWP::JT_THREAD: |
| case JDWP::JT_THREAD_GROUP: |
| case JDWP::JT_CLASS_LOADER: |
| case JDWP::JT_CLASS_OBJECT: |
| return 'L'; |
| } |
| } |
| |
| JDWP::JdwpError Dbg::InvokeMethod(JDWP::ObjectId thread_id, JDWP::ObjectId object_id, |
| JDWP::RefTypeId class_id, JDWP::MethodId method_id, |
| uint32_t arg_count, uint64_t* arg_values, |
| JDWP::JdwpTag* arg_types, uint32_t options, |
| JDWP::JdwpTag* pResultTag, uint64_t* pResultValue, |
| JDWP::ObjectId* pExceptionId) { |
| ThreadList* thread_list = Runtime::Current()->GetThreadList(); |
| |
| Thread* targetThread = NULL; |
| DebugInvokeReq* req = NULL; |
| Thread* self = Thread::Current(); |
| { |
| ScopedObjectAccessUnchecked soa(self); |
| MutexLock mu(soa.Self(), *Locks::thread_list_lock_); |
| JDWP::JdwpError error = DecodeThread(soa, thread_id, targetThread); |
| if (error != JDWP::ERR_NONE) { |
| LOG(ERROR) << "InvokeMethod request for invalid thread id " << thread_id; |
| return error; |
| } |
| req = targetThread->GetInvokeReq(); |
| if (!req->ready) { |
| LOG(ERROR) << "InvokeMethod request for thread not stopped by event: " << *targetThread; |
| return JDWP::ERR_INVALID_THREAD; |
| } |
| |
| /* |
| * We currently have a bug where we don't successfully resume the |
| * target thread if the suspend count is too deep. We're expected to |
| * require one "resume" for each "suspend", but when asked to execute |
| * a method we have to resume fully and then re-suspend it back to the |
| * same level. (The easiest way to cause this is to type "suspend" |
| * multiple times in jdb.) |
| * |
| * It's unclear what this means when the event specifies "resume all" |
| * and some threads are suspended more deeply than others. This is |
| * a rare problem, so for now we just prevent it from hanging forever |
| * by rejecting the method invocation request. Without this, we will |
| * be stuck waiting on a suspended thread. |
| */ |
| int suspend_count; |
| { |
| MutexLock mu2(soa.Self(), *Locks::thread_suspend_count_lock_); |
| suspend_count = targetThread->GetSuspendCount(); |
| } |
| if (suspend_count > 1) { |
| LOG(ERROR) << *targetThread << " suspend count too deep for method invocation: " << suspend_count; |
| return JDWP::ERR_THREAD_SUSPENDED; // Probably not expected here. |
| } |
| |
| JDWP::JdwpError status; |
| mirror::Object* receiver = gRegistry->Get<mirror::Object*>(object_id); |
| if (receiver == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| |
| mirror::Object* thread = gRegistry->Get<mirror::Object*>(thread_id); |
| if (thread == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| // TODO: check that 'thread' is actually a java.lang.Thread! |
| |
| mirror::Class* c = DecodeClass(class_id, status); |
| if (c == NULL) { |
| return status; |
| } |
| |
| mirror::ArtMethod* m = FromMethodId(method_id); |
| if (m->IsStatic() != (receiver == NULL)) { |
| return JDWP::ERR_INVALID_METHODID; |
| } |
| if (m->IsStatic()) { |
| if (m->GetDeclaringClass() != c) { |
| return JDWP::ERR_INVALID_METHODID; |
| } |
| } else { |
| if (!m->GetDeclaringClass()->IsAssignableFrom(c)) { |
| return JDWP::ERR_INVALID_METHODID; |
| } |
| } |
| |
| // Check the argument list matches the method. |
| MethodHelper mh(m); |
| if (mh.GetShortyLength() - 1 != arg_count) { |
| return JDWP::ERR_ILLEGAL_ARGUMENT; |
| } |
| const char* shorty = mh.GetShorty(); |
| const DexFile::TypeList* types = mh.GetParameterTypeList(); |
| for (size_t i = 0; i < arg_count; ++i) { |
| if (shorty[i + 1] != JdwpTagToShortyChar(arg_types[i])) { |
| return JDWP::ERR_ILLEGAL_ARGUMENT; |
| } |
| |
| if (shorty[i + 1] == 'L') { |
| // Did we really get an argument of an appropriate reference type? |
| mirror::Class* parameter_type = mh.GetClassFromTypeIdx(types->GetTypeItem(i).type_idx_); |
| mirror::Object* argument = gRegistry->Get<mirror::Object*>(arg_values[i]); |
| if (argument == ObjectRegistry::kInvalidObject) { |
| return JDWP::ERR_INVALID_OBJECT; |
| } |
| if (!argument->InstanceOf(parameter_type)) { |
| return JDWP::ERR_ILLEGAL_ARGUMENT; |
| } |
| |
| // Turn the on-the-wire ObjectId into a jobject. |
| jvalue& v = reinterpret_cast<jvalue&>(arg_values[i]); |
| v.l = gRegistry->GetJObject(arg_values[i]); |
| } |
| } |
| |
| req->receiver_ = receiver; |
| req->thread_ = thread; |
| req->class_ = c; |
| req->method_ = m; |
| req->arg_count_ = arg_count; |
| req->arg_values_ = arg_values; |
| req->options_ = options; |
| req->invoke_needed_ = true; |
| } |
| |
| // The fact that we've released the thread list lock is a bit risky --- if the thread goes |
| // away we're sitting high and dry -- but we must release this before the ResumeAllThreads |
| // call, and it's unwise to hold it during WaitForSuspend. |
| |
| { |
| /* |
| * We change our (JDWP thread) status, which should be THREAD_RUNNING, |
| * so we can suspend for a GC if the invoke request causes us to |
| * run out of memory. It's also a good idea to change it before locking |
| * the invokeReq mutex, although that should never be held for long. |
| */ |
| self->TransitionFromRunnableToSuspended(kWaitingForDebuggerSend); |
| |
| VLOG(jdwp) << " Transferring control to event thread"; |
| { |
| MutexLock mu(self, req->lock_); |
| |
| if ((options & JDWP::INVOKE_SINGLE_THREADED) == 0) { |
| VLOG(jdwp) << " Resuming all threads"; |
| thread_list->UndoDebuggerSuspensions(); |
| } else { |
| VLOG(jdwp) << " Resuming event thread only"; |
| thread_list->Resume(targetThread, true); |
| } |
| |
| // Wait for the request to finish executing. |
| while (req->invoke_needed_) { |
| req->cond_.Wait(self); |
| } |
| } |
| VLOG(jdwp) << " Control has returned from event thread"; |
| |
| /* wait for thread to re-suspend itself */ |
| SuspendThread(thread_id, false /* request_suspension */); |
| self->TransitionFromSuspendedToRunnable(); |
| } |
| |
| /* |
| * Suspend the threads. We waited for the target thread to suspend |
| * itself, so all we need to do is suspend the others. |
| * |
| * The suspendAllThreads() call will double-suspend the event thread, |
| * so we want to resume the target thread once to keep the books straight. |
| */ |
| if ((options & JDWP::INVOKE_SINGLE_THREADED) == 0) { |
| self->TransitionFromRunnableToSuspended(kWaitingForDebuggerSuspension); |
| VLOG(jdwp) << " Suspending all threads"; |
| thread_list->SuspendAllForDebugger(); |
| self->TransitionFromSuspendedToRunnable(); |
| VLOG(jdwp) << " Resuming event thread to balance the count"; |
| thread_list->Resume(targetThread, true); |
| } |
| |
| // Copy the result. |
| *pResultTag = req->result_tag; |
| if (IsPrimitiveTag(req->result_tag)) { |
| *pResultValue = req->result_value.GetJ(); |
| } else { |
| *pResultValue = gRegistry->Add(req->result_value.GetL()); |
| } |
| *pExceptionId = req->exception; |
| return req->error; |
| } |
| |
| void Dbg::ExecuteMethod(DebugInvokeReq* pReq) { |
| ScopedObjectAccess soa(Thread::Current()); |
| |
| // We can be called while an exception is pending. We need |
| // to preserve that across the method invocation. |
| SirtRef<mirror::Object> old_throw_this_object(soa.Self(), NULL); |
| SirtRef<mirror::ArtMethod> old_throw_method(soa.Self(), NULL); |
| SirtRef<mirror::Throwable> old_exception(soa.Self(), NULL); |
| uint32_t old_throw_dex_pc; |
| { |
| ThrowLocation old_throw_location; |
| mirror::Throwable* old_exception_obj = soa.Self()->GetException(&old_throw_location); |
| old_throw_this_object.reset(old_throw_location.GetThis()); |
| old_throw_method.reset(old_throw_location.GetMethod()); |
| old_exception.reset(old_exception_obj); |
| old_throw_dex_pc = old_throw_location.GetDexPc(); |
| soa.Self()->ClearException(); |
| } |
| |
| // Translate the method through the vtable, unless the debugger wants to suppress it. |
| mirror::ArtMethod* m = pReq->method_; |
| if ((pReq->options_ & JDWP::INVOKE_NONVIRTUAL) == 0 && pReq->receiver_ != NULL) { |
| mirror::ArtMethod* actual_method = pReq->class_->FindVirtualMethodForVirtualOrInterface(pReq->method_); |
| if (actual_method != m) { |
| VLOG(jdwp) << "ExecuteMethod translated " << PrettyMethod(m) << " to " << PrettyMethod(actual_method); |
| m = actual_method; |
| } |
| } |
| VLOG(jdwp) << "ExecuteMethod " << PrettyMethod(m) |
| << " receiver=" << pReq->receiver_ |
| << " arg_count=" << pReq->arg_count_; |
| CHECK(m != NULL); |
| |
| CHECK_EQ(sizeof(jvalue), sizeof(uint64_t)); |
| |
| MethodHelper mh(m); |
| ArgArray arg_array(mh.GetShorty(), mh.GetShortyLength()); |
| arg_array.BuildArgArray(soa, pReq->receiver_, reinterpret_cast<jvalue*>(pReq->arg_values_)); |
| InvokeWithArgArray(soa, m, &arg_array, &pReq->result_value, mh.GetShorty()[0]); |
| |
| mirror::Throwable* exception = soa.Self()->GetException(NULL); |
| soa.Self()->ClearException(); |
| pReq->exception = gRegistry->Add(exception); |
| pReq->result_tag = BasicTagFromDescriptor(MethodHelper(m).GetShorty()); |
| if (pReq->exception != 0) { |
| VLOG(jdwp) << " JDWP invocation returning with exception=" << exception |
| << " " << exception->Dump(); |
| pReq->result_value.SetJ(0); |
| } else if (pReq->result_tag == JDWP::JT_OBJECT) { |
| /* if no exception thrown, examine object result more closely */ |
| JDWP::JdwpTag new_tag = TagFromObject(pReq->result_value.GetL()); |
| if (new_tag != pReq->result_tag) { |
| VLOG(jdwp) << " JDWP promoted result from " << pReq->result_tag << " to " << new_tag; |
| pReq->result_tag = new_tag; |
| } |
| |
| /* |
| * Register the object. We don't actually need an ObjectId yet, |
| * but we do need to be sure that the GC won't move or discard the |
| * object when we switch out of RUNNING. The ObjectId conversion |
| * will add the object to the "do not touch" list. |
| * |
| * We can't use the "tracked allocation" mechanism here because |
| * the object is going to be handed off to a different thread. |
| */ |
| gRegistry->Add(pReq->result_value.GetL()); |
| } |
| |
| if (old_exception.get() != NULL) { |
| ThrowLocation gc_safe_throw_location(old_throw_this_object.get(), old_throw_method.get(), |
| old_throw_dex_pc); |
| soa.Self()->SetException(gc_safe_throw_location, old_exception.get()); |
| } |
| } |
| |
| /* |
| * "request" contains a full JDWP packet, possibly with multiple chunks. We |
| * need to process each, accumulate the replies, and ship the whole thing |
| * back. |
| * |
| * Returns "true" if we have a reply. The reply buffer is newly allocated, |
| * and includes the chunk type/length, followed by the data. |
| * |
| * OLD-TODO: we currently assume that the request and reply include a single |
| * chunk. If this becomes inconvenient we will need to adapt. |
| */ |
| bool Dbg::DdmHandlePacket(JDWP::Request& request, uint8_t** pReplyBuf, int* pReplyLen) { |
| Thread* self = Thread::Current(); |
| JNIEnv* env = self->GetJniEnv(); |
| |
| uint32_t type = request.ReadUnsigned32("type"); |
| uint32_t length = request.ReadUnsigned32("length"); |
| |
| // Create a byte[] corresponding to 'request'. |
| size_t request_length = request.size(); |
| ScopedLocalRef<jbyteArray> dataArray(env, env->NewByteArray(request_length)); |
| if (dataArray.get() == NULL) { |
| LOG(WARNING) << "byte[] allocation failed: " << request_length; |
| env->ExceptionClear(); |
| return false; |
| } |
| env->SetByteArrayRegion(dataArray.get(), 0, request_length, reinterpret_cast<const jbyte*>(request.data())); |
| request.Skip(request_length); |
| |
| // Run through and find all chunks. [Currently just find the first.] |
| ScopedByteArrayRO contents(env, dataArray.get()); |
| if (length != request_length) { |
| LOG(WARNING) << StringPrintf("bad chunk found (len=%u pktLen=%d)", length, request_length); |
| return false; |
| } |
| |
| // Call "private static Chunk dispatch(int type, byte[] data, int offset, int length)". |
| ScopedLocalRef<jobject> chunk(env, env->CallStaticObjectMethod(WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer, |
| WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_dispatch, |
| type, dataArray.get(), 0, length)); |
| if (env->ExceptionCheck()) { |
| LOG(INFO) << StringPrintf("Exception thrown by dispatcher for 0x%08x", type); |
| env->ExceptionDescribe(); |
| env->ExceptionClear(); |
| return false; |
| } |
| |
| if (chunk.get() == NULL) { |
| return false; |
| } |
| |
| /* |
| * Pull the pieces out of the chunk. We copy the results into a |
| * newly-allocated buffer that the caller can free. We don't want to |
| * continue using the Chunk object because nothing has a reference to it. |
| * |
| * We could avoid this by returning type/data/offset/length and having |
| * the caller be aware of the object lifetime issues, but that |
| * integrates the JDWP code more tightly into the rest of the runtime, and doesn't work |
| * if we have responses for multiple chunks. |
| * |
| * So we're pretty much stuck with copying data around multiple times. |
| */ |
| ScopedLocalRef<jbyteArray> replyData(env, reinterpret_cast<jbyteArray>(env->GetObjectField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_data))); |
| jint offset = env->GetIntField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_offset); |
| length = env->GetIntField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_length); |
| type = env->GetIntField(chunk.get(), WellKnownClasses::org_apache_harmony_dalvik_ddmc_Chunk_type); |
| |
| VLOG(jdwp) << StringPrintf("DDM reply: type=0x%08x data=%p offset=%d length=%d", type, replyData.get(), offset, length); |
| if (length == 0 || replyData.get() == NULL) { |
| return false; |
| } |
| |
| const int kChunkHdrLen = 8; |
| uint8_t* reply = new uint8_t[length + kChunkHdrLen]; |
| if (reply == NULL) { |
| LOG(WARNING) << "malloc failed: " << (length + kChunkHdrLen); |
| return false; |
| } |
| JDWP::Set4BE(reply + 0, type); |
| JDWP::Set4BE(reply + 4, length); |
| env->GetByteArrayRegion(replyData.get(), offset, length, reinterpret_cast<jbyte*>(reply + kChunkHdrLen)); |
| |
| *pReplyBuf = reply; |
| *pReplyLen = length + kChunkHdrLen; |
| |
| VLOG(jdwp) << StringPrintf("dvmHandleDdm returning type=%.4s %p len=%d", reinterpret_cast<char*>(reply), reply, length); |
| return true; |
| } |
| |
| void Dbg::DdmBroadcast(bool connect) { |
| VLOG(jdwp) << "Broadcasting DDM " << (connect ? "connect" : "disconnect") << "..."; |
| |
| Thread* self = Thread::Current(); |
| if (self->GetState() != kRunnable) { |
| LOG(ERROR) << "DDM broadcast in thread state " << self->GetState(); |
| /* try anyway? */ |
| } |
| |
| JNIEnv* env = self->GetJniEnv(); |
| jint event = connect ? 1 /*DdmServer.CONNECTED*/ : 2 /*DdmServer.DISCONNECTED*/; |
| env->CallStaticVoidMethod(WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer, |
| WellKnownClasses::org_apache_harmony_dalvik_ddmc_DdmServer_broadcast, |
| event); |
| if (env->ExceptionCheck()) { |
| LOG(ERROR) << "DdmServer.broadcast " << event << " failed"; |
| env->ExceptionDescribe(); |
| env->ExceptionClear(); |
| } |
| } |
| |
| void Dbg::DdmConnected() { |
| Dbg::DdmBroadcast(true); |
| } |
| |
| void Dbg::DdmDisconnected() { |
| Dbg::DdmBroadcast(false); |
| gDdmThreadNotification = false; |
| } |
| |
| /* |
| * Send a notification when a thread starts, stops, or changes its name. |
| * |
| * Because we broadcast the full set of threads when the notifications are |
| * first enabled, it's possible for "thread" to be actively executing. |
| */ |
| void Dbg::DdmSendThreadNotification(Thread* t, uint32_t type) { |
| if (!gDdmThreadNotification) { |
| return; |
| } |
| |
| if (type == CHUNK_TYPE("THDE")) { |
| uint8_t buf[4]; |
| JDWP::Set4BE(&buf[0], t->GetThreadId()); |
| Dbg::DdmSendChunk(CHUNK_TYPE("THDE"), 4, buf); |
| } else { |
| CHECK(type == CHUNK_TYPE("THCR") || type == CHUNK_TYPE("THNM")) << type; |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| SirtRef<mirror::String> name(soa.Self(), t->GetThreadName(soa)); |
| size_t char_count = (name.get() != NULL) ? name->GetLength() : 0; |
| const jchar* chars = (name.get() != NULL) ? name->GetCharArray()->GetData() : NULL; |
| |
| std::vector<uint8_t> bytes; |
| JDWP::Append4BE(bytes, t->GetThreadId()); |
| JDWP::AppendUtf16BE(bytes, chars, char_count); |
| CHECK_EQ(bytes.size(), char_count*2 + sizeof(uint32_t)*2); |
| Dbg::DdmSendChunk(type, bytes); |
| } |
| } |
| |
| void Dbg::DdmSetThreadNotification(bool enable) { |
| // Enable/disable thread notifications. |
| gDdmThreadNotification = enable; |
| if (enable) { |
| // Suspend the VM then post thread start notifications for all threads. Threads attaching will |
| // see a suspension in progress and block until that ends. They then post their own start |
| // notification. |
| SuspendVM(); |
| std::list<Thread*> threads; |
| Thread* self = Thread::Current(); |
| { |
| MutexLock mu(self, *Locks::thread_list_lock_); |
| threads = Runtime::Current()->GetThreadList()->GetList(); |
| } |
| { |
| ScopedObjectAccess soa(self); |
| for (Thread* thread : threads) { |
| Dbg::DdmSendThreadNotification(thread, CHUNK_TYPE("THCR")); |
| } |
| } |
| ResumeVM(); |
| } |
| } |
| |
| void Dbg::PostThreadStartOrStop(Thread* t, uint32_t type) { |
| if (IsDebuggerActive()) { |
| ScopedObjectAccessUnchecked soa(Thread::Current()); |
| JDWP::ObjectId id = gRegistry->Add(t->GetPeer()); |
| gJdwpState->PostThreadChange(id, type == CHUNK_TYPE("THCR")); |
| } |
| Dbg::DdmSendThreadNotification(t, type); |
| } |
| |
| void Dbg::PostThreadStart(Thread* t) { |
| Dbg::PostThreadStartOrStop(t, CHUNK_TYPE("THCR")); |
| } |
| |
| void Dbg::PostThreadDeath(Thread* t) { |
| Dbg::PostThreadStartOrStop(t, CHUNK_TYPE("THDE")); |
| } |
| |
| void Dbg::DdmSendChunk(uint32_t type, size_t byte_count, const uint8_t* buf) { |
| CHECK(buf != NULL); |
| iovec vec[1]; |
| vec[0].iov_base = reinterpret_cast<void*>(const_cast<uint8_t*>(buf)); |
| vec[0].iov_len = byte_count; |
| Dbg::DdmSendChunkV(type, vec, 1); |
| } |
| |
| void Dbg::DdmSendChunk(uint32_t type, const std::vector<uint8_t>& bytes) { |
| DdmSendChunk(type, bytes.size(), &bytes[0]); |
| } |
| |
| void Dbg::DdmSendChunkV(uint32_t type, const iovec* iov, int iov_count) { |
| if (gJdwpState == NULL) { |
| VLOG(jdwp) << "Debugger thread not active, ignoring DDM send: " << type; |
| } else { |
| gJdwpState->DdmSendChunkV(type, iov, iov_count); |
| } |
| } |
| |
| int Dbg::DdmHandleHpifChunk(HpifWhen when) { |
| if (when == HPIF_WHEN_NOW) { |
| DdmSendHeapInfo(when); |
| return true; |
| } |
| |
| if (when != HPIF_WHEN_NEVER && when != HPIF_WHEN_NEXT_GC && when != HPIF_WHEN_EVERY_GC) { |
| LOG(ERROR) << "invalid HpifWhen value: " << static_cast<int>(when); |
| return false; |
| } |
| |
| gDdmHpifWhen = when; |
| return true; |
| } |
| |
| bool Dbg::DdmHandleHpsgNhsgChunk(Dbg::HpsgWhen when, Dbg::HpsgWhat what, bool native) { |
| if (when != HPSG_WHEN_NEVER && when != HPSG_WHEN_EVERY_GC) { |
| LOG(ERROR) << "invalid HpsgWhen value: " << static_cast<int>(when); |
| return false; |
| } |
| |
| if (what != HPSG_WHAT_MERGED_OBJECTS && what != HPSG_WHAT_DISTINCT_OBJECTS) { |
| LOG(ERROR) << "invalid HpsgWhat value: " << static_cast<int>(what); |
| return false; |
| } |
| |
| if (native) { |
| gDdmNhsgWhen = when; |
| gDdmNhsgWhat = what; |
| } else { |
| gDdmHpsgWhen = when; |
| gDdmHpsgWhat = what; |
| } |
| return true; |
| } |
| |
| void Dbg::DdmSendHeapInfo(HpifWhen reason) { |
| // If there's a one-shot 'when', reset it. |
| if (reason == gDdmHpifWhen) { |
| if (gDdmHpifWhen == HPIF_WHEN_NEXT_GC) { |
| gDdmHpifWhen = HPIF_WHEN_NEVER; |
| } |
| } |
| |
| /* |
| * Chunk HPIF (client --> server) |
| * |
| * Heap Info. General information about the heap, |
| * suitable for a summary display. |
| * |
| * [u4]: number of heaps |
| * |
| * For each heap: |
| * [u4]: heap ID |
| * [u8]: timestamp in ms since Unix epoch |
| * [u1]: capture reason (same as 'when' value from server) |
| * [u4]: max heap size in bytes (-Xmx) |
| * [u4]: current heap size in bytes |
| * [u4]: current number of bytes allocated |
| * [u4]: current number of objects allocated |
| */ |
| uint8_t heap_count = 1; |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| std::vector<uint8_t> bytes; |
| JDWP::Append4BE(bytes, heap_count); |
| JDWP::Append4BE(bytes, 1); // Heap id (bogus; we only have one heap). |
| JDWP::Append8BE(bytes, MilliTime()); |
| JDWP::Append1BE(bytes, reason); |
| JDWP::Append4BE(bytes, heap->GetMaxMemory()); // Max allowed heap size in bytes. |
| JDWP::Append4BE(bytes, heap->GetTotalMemory()); // Current heap size in bytes. |
| JDWP::Append4BE(bytes, heap->GetBytesAllocated()); |
| JDWP::Append4BE(bytes, heap->GetObjectsAllocated()); |
| CHECK_EQ(bytes.size(), 4U + (heap_count * (4 + 8 + 1 + 4 + 4 + 4 + 4))); |
| Dbg::DdmSendChunk(CHUNK_TYPE("HPIF"), bytes); |
| } |
| |
| enum HpsgSolidity { |
| SOLIDITY_FREE = 0, |
| SOLIDITY_HARD = 1, |
| SOLIDITY_SOFT = 2, |
| SOLIDITY_WEAK = 3, |
| SOLIDITY_PHANTOM = 4, |
| SOLIDITY_FINALIZABLE = 5, |
| SOLIDITY_SWEEP = 6, |
| }; |
| |
| enum HpsgKind { |
| KIND_OBJECT = 0, |
| KIND_CLASS_OBJECT = 1, |
| KIND_ARRAY_1 = 2, |
| KIND_ARRAY_2 = 3, |
| KIND_ARRAY_4 = 4, |
| KIND_ARRAY_8 = 5, |
| KIND_UNKNOWN = 6, |
| KIND_NATIVE = 7, |
| }; |
| |
| #define HPSG_PARTIAL (1<<7) |
| #define HPSG_STATE(solidity, kind) ((uint8_t)((((kind) & 0x7) << 3) | ((solidity) & 0x7))) |
| |
| class HeapChunkContext { |
| public: |
| // Maximum chunk size. Obtain this from the formula: |
| // (((maximum_heap_size / ALLOCATION_UNIT_SIZE) + 255) / 256) * 2 |
| HeapChunkContext(bool merge, bool native) |
| : buf_(16384 - 16), |
| type_(0), |
| merge_(merge) { |
| Reset(); |
| if (native) { |
| type_ = CHUNK_TYPE("NHSG"); |
| } else { |
| type_ = merge ? CHUNK_TYPE("HPSG") : CHUNK_TYPE("HPSO"); |
| } |
| } |
| |
| ~HeapChunkContext() { |
| if (p_ > &buf_[0]) { |
| Flush(); |
| } |
| } |
| |
| void EnsureHeader(const void* chunk_ptr) { |
| if (!needHeader_) { |
| return; |
| } |
| |
| // Start a new HPSx chunk. |
| JDWP::Write4BE(&p_, 1); // Heap id (bogus; we only have one heap). |
| JDWP::Write1BE(&p_, 8); // Size of allocation unit, in bytes. |
| |
| JDWP::Write4BE(&p_, reinterpret_cast<uintptr_t>(chunk_ptr)); // virtual address of segment start. |
| JDWP::Write4BE(&p_, 0); // offset of this piece (relative to the virtual address). |
| // [u4]: length of piece, in allocation units |
| // We won't know this until we're done, so save the offset and stuff in a dummy value. |
| pieceLenField_ = p_; |
| JDWP::Write4BE(&p_, 0x55555555); |
| needHeader_ = false; |
| } |
| |
| void Flush() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| if (pieceLenField_ == NULL) { |
| // Flush immediately post Reset (maybe back-to-back Flush). Ignore. |
| CHECK(needHeader_); |
| return; |
| } |
| // Patch the "length of piece" field. |
| CHECK_LE(&buf_[0], pieceLenField_); |
| CHECK_LE(pieceLenField_, p_); |
| JDWP::Set4BE(pieceLenField_, totalAllocationUnits_); |
| |
| Dbg::DdmSendChunk(type_, p_ - &buf_[0], &buf_[0]); |
| Reset(); |
| } |
| |
| static void HeapChunkCallback(void* start, void* end, size_t used_bytes, void* arg) |
| SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, |
| Locks::mutator_lock_) { |
| reinterpret_cast<HeapChunkContext*>(arg)->HeapChunkCallback(start, end, used_bytes); |
| } |
| |
| private: |
| enum { ALLOCATION_UNIT_SIZE = 8 }; |
| |
| void Reset() { |
| p_ = &buf_[0]; |
| startOfNextMemoryChunk_ = NULL; |
| totalAllocationUnits_ = 0; |
| needHeader_ = true; |
| pieceLenField_ = NULL; |
| } |
| |
| void HeapChunkCallback(void* start, void* /*end*/, size_t used_bytes) |
| SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_, |
| Locks::mutator_lock_) { |
| // Note: heap call backs cannot manipulate the heap upon which they are crawling, care is taken |
| // in the following code not to allocate memory, by ensuring buf_ is of the correct size |
| if (used_bytes == 0) { |
| if (start == NULL) { |
| // Reset for start of new heap. |
| startOfNextMemoryChunk_ = NULL; |
| Flush(); |
| } |
| // Only process in use memory so that free region information |
| // also includes dlmalloc book keeping. |
| return; |
| } |
| |
| /* If we're looking at the native heap, we'll just return |
| * (SOLIDITY_HARD, KIND_NATIVE) for all allocated chunks |
| */ |
| bool native = type_ == CHUNK_TYPE("NHSG"); |
| |
| if (startOfNextMemoryChunk_ != NULL) { |
| // Transmit any pending free memory. Native free memory of |
| // over kMaxFreeLen could be because of the use of mmaps, so |
| // don't report. If not free memory then start a new segment. |
| bool flush = true; |
| if (start > startOfNextMemoryChunk_) { |
| const size_t kMaxFreeLen = 2 * kPageSize; |
| void* freeStart = startOfNextMemoryChunk_; |
| void* freeEnd = start; |
| size_t freeLen = reinterpret_cast<char*>(freeEnd) - reinterpret_cast<char*>(freeStart); |
| if (!native || freeLen < kMaxFreeLen) { |
| AppendChunk(HPSG_STATE(SOLIDITY_FREE, 0), freeStart, freeLen); |
| flush = false; |
| } |
| } |
| if (flush) { |
| startOfNextMemoryChunk_ = NULL; |
| Flush(); |
| } |
| } |
| const mirror::Object* obj = reinterpret_cast<const mirror::Object*>(start); |
| |
| // Determine the type of this chunk. |
| // OLD-TODO: if context.merge, see if this chunk is different from the last chunk. |
| // If it's the same, we should combine them. |
| uint8_t state = ExamineObject(obj, native); |
| // dlmalloc's chunk header is 2 * sizeof(size_t), but if the previous chunk is in use for an |
| // allocation then the first sizeof(size_t) may belong to it. |
| const size_t dlMallocOverhead = sizeof(size_t); |
| AppendChunk(state, start, used_bytes + dlMallocOverhead); |
| startOfNextMemoryChunk_ = reinterpret_cast<char*>(start) + used_bytes + dlMallocOverhead; |
| } |
| |
| void AppendChunk(uint8_t state, void* ptr, size_t length) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { |
| // Make sure there's enough room left in the buffer. |
| // We need to use two bytes for every fractional 256 allocation units used by the chunk plus |
| // 17 bytes for any header. |
| size_t needed = (((length/ALLOCATION_UNIT_SIZE + 255) / 256) * 2) + 17; |
| size_t bytesLeft = buf_.size() - (size_t)(p_ - &buf_[0]); |
| if (bytesLeft < needed) { |
| Flush(); |
| } |
| |
| bytesLeft = buf_.size() - (size_t)(p_ - &buf_[0]); |
| if (bytesLeft < needed) { |
| LOG(WARNING) << "Chunk is too big to transmit (chunk_len=" << length << ", " |
| << needed << " bytes)"; |
| return; |
| } |
| EnsureHeader(ptr); |
| // Write out the chunk description. |
| length /= ALLOCATION_UNIT_SIZE; // Convert to allocation units. |
| totalAllocationUnits_ += length; |
| while (length > 256) { |
| *p_++ = state | HPSG_PARTIAL; |
| *p_++ = 255; // length - 1 |
| length -= 256; |
| } |
| *p_++ = state; |
| *p_++ = length - 1; |
| } |
| |
| uint8_t ExamineObject(const mirror::Object* o, bool is_native_heap) |
| SHARED_LOCKS_REQUIRED(Locks::heap_bitmap_lock_) { |
| if (o == NULL) { |
| return HPSG_STATE(SOLIDITY_FREE, 0); |
| } |
| |
| // It's an allocated chunk. Figure out what it is. |
| |
| // If we're looking at the native heap, we'll just return |
| // (SOLIDITY_HARD, KIND_NATIVE) for all allocated chunks. |
| if (is_native_heap) { |
| return HPSG_STATE(SOLIDITY_HARD, KIND_NATIVE); |
| } |
| |
| if (!Runtime::Current()->GetHeap()->IsLiveObjectLocked(o)) { |
| return HPSG_STATE(SOLIDITY_HARD, KIND_NATIVE); |
| } |
| |
| mirror::Class* c = o->GetClass(); |
| if (c == NULL) { |
| // The object was probably just created but hasn't been initialized yet. |
| return HPSG_STATE(SOLIDITY_HARD, KIND_OBJECT); |
| } |
| |
| if (!Runtime::Current()->GetHeap()->IsValidObjectAddress(c)) { |
| LOG(ERROR) << "Invalid class for managed heap object: " << o << " " << c; |
| return HPSG_STATE(SOLIDITY_HARD, KIND_UNKNOWN); |
| } |
| |
| if (c->IsClassClass()) { |
| return HPSG_STATE(SOLIDITY_HARD, KIND_CLASS_OBJECT); |
| } |
| |
| if (c->IsArrayClass()) { |
| if (o->IsObjectArray()) { |
| return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_4); |
| } |
| switch (c->GetComponentSize()) { |
| case 1: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_1); |
| case 2: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_2); |
| case 4: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_4); |
| case 8: return HPSG_STATE(SOLIDITY_HARD, KIND_ARRAY_8); |
| } |
| } |
| |
| return HPSG_STATE(SOLIDITY_HARD, KIND_OBJECT); |
| } |
| |
| std::vector<uint8_t> buf_; |
| uint8_t* p_; |
| uint8_t* pieceLenField_; |
| void* startOfNextMemoryChunk_; |
| size_t totalAllocationUnits_; |
| uint32_t type_; |
| bool merge_; |
| bool needHeader_; |
| |
| DISALLOW_COPY_AND_ASSIGN(HeapChunkContext); |
| }; |
| |
| void Dbg::DdmSendHeapSegments(bool native) { |
| Dbg::HpsgWhen when; |
| Dbg::HpsgWhat what; |
| if (!native) { |
| when = gDdmHpsgWhen; |
| what = gDdmHpsgWhat; |
| } else { |
| when = gDdmNhsgWhen; |
| what = gDdmNhsgWhat; |
| } |
| if (when == HPSG_WHEN_NEVER) { |
| return; |
| } |
| |
| // Figure out what kind of chunks we'll be sending. |
| CHECK(what == HPSG_WHAT_MERGED_OBJECTS || what == HPSG_WHAT_DISTINCT_OBJECTS) << static_cast<int>(what); |
| |
| // First, send a heap start chunk. |
| uint8_t heap_id[4]; |
| JDWP::Set4BE(&heap_id[0], 1); // Heap id (bogus; we only have one heap). |
| Dbg::DdmSendChunk(native ? CHUNK_TYPE("NHST") : CHUNK_TYPE("HPST"), sizeof(heap_id), heap_id); |
| |
| // Send a series of heap segment chunks. |
| HeapChunkContext context((what == HPSG_WHAT_MERGED_OBJECTS), native); |
| if (native) { |
| dlmalloc_inspect_all(HeapChunkContext::HeapChunkCallback, &context); |
| } else { |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| const std::vector<gc::space::ContinuousSpace*>& spaces = heap->GetContinuousSpaces(); |
| Thread* self = Thread::Current(); |
| ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_); |
| typedef std::vector<gc::space::ContinuousSpace*>::const_iterator It; |
| for (It cur = spaces.begin(), end = spaces.end(); cur != end; ++cur) { |
| if ((*cur)->IsDlMallocSpace()) { |
| (*cur)->AsDlMallocSpace()->Walk(HeapChunkContext::HeapChunkCallback, &context); |
| } |
| } |
| // Walk the large objects, these are not in the AllocSpace. |
| heap->GetLargeObjectsSpace()->Walk(HeapChunkContext::HeapChunkCallback, &context); |
| } |
| |
| // Finally, send a heap end chunk. |
| Dbg::DdmSendChunk(native ? CHUNK_TYPE("NHEN") : CHUNK_TYPE("HPEN"), sizeof(heap_id), heap_id); |
| } |
| |
| static size_t GetAllocTrackerMax() { |
| #ifdef HAVE_ANDROID_OS |
| // Check whether there's a system property overriding the number of records. |
| const char* propertyName = "dalvik.vm.allocTrackerMax"; |
| char allocRecordMaxString[PROPERTY_VALUE_MAX]; |
| if (property_get(propertyName, allocRecordMaxString, "") > 0) { |
| char* end; |
| size_t value = strtoul(allocRecordMaxString, &end, 10); |
| if (*end != '\0') { |
| LOG(ERROR) << "Ignoring " << propertyName << " '" << allocRecordMaxString |
| << "' --- invalid"; |
| return kDefaultNumAllocRecords; |
| } |
| if (!IsPowerOfTwo(value)) { |
| LOG(ERROR) << "Ignoring " << propertyName << " '" << allocRecordMaxString |
| << "' --- not power of two"; |
| return kDefaultNumAllocRecords; |
| } |
| return value; |
| } |
| #endif |
| return kDefaultNumAllocRecords; |
| } |
| |
| void Dbg::SetAllocTrackingEnabled(bool enabled) { |
| MutexLock mu(Thread::Current(), gAllocTrackerLock); |
| if (enabled) { |
| if (recent_allocation_records_ == NULL) { |
| gAllocRecordMax = GetAllocTrackerMax(); |
| LOG(INFO) << "Enabling alloc tracker (" << gAllocRecordMax << " entries of " |
| << kMaxAllocRecordStackDepth << " frames, taking " |
| << PrettySize(sizeof(AllocRecord) * gAllocRecordMax) << ")"; |
| gAllocRecordHead = gAllocRecordCount = 0; |
| recent_allocation_records_ = new AllocRecord[gAllocRecordMax]; |
| CHECK(recent_allocation_records_ != NULL); |
| } |
| Runtime::Current()->GetInstrumentation()->InstrumentQuickAllocEntryPoints(); |
| } else { |
| Runtime::Current()->GetInstrumentation()->UninstrumentQuickAllocEntryPoints(); |
| delete[] recent_allocation_records_; |
| recent_allocation_records_ = NULL; |
| } |
| } |
| |
| struct AllocRecordStackVisitor : public StackVisitor { |
| AllocRecordStackVisitor(Thread* thread, AllocRecord* record) |
| SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) |
| : StackVisitor(thread, NULL), record(record), depth(0) {} |
| |
| // TODO: Enable annotalysis. We know lock is held in constructor, but abstraction confuses |
| // annotalysis. |
| bool VisitFrame() NO_THREAD_SAFETY_ANALYSIS { |
| if (depth >= kMaxAllocRecordStackDepth) { |
| return false; |
| } |
| mirror::ArtMethod* m = GetMethod(); |
| if (!m->IsRuntimeMethod()) { |
| record->stack[depth].method = m; |
| record->stack[depth].dex_pc = GetDexPc(); |
| ++depth; |
| } |
| return true; |
| } |
| |
| ~AllocRecordStackVisitor() { |
| // Clear out any unused stack trace elements. |
| for (; depth < kMaxAllocRecordStackDepth; ++depth) { |
| record->stack[depth].method = NULL; |
| record->stack[depth].dex_pc = 0; |
| } |
| } |
| |
| AllocRecord* record; |
| size_t depth; |
| }; |
| |
| void Dbg::RecordAllocation(mirror::Class* type, size_t byte_count) { |
| Thread* self = Thread::Current(); |
| CHECK(self != NULL); |
| |
| MutexLock mu(self, gAllocTrackerLock); |
| if (recent_allocation_records_ == NULL) { |
| return; |
| } |
| |
| // Advance and clip. |
| if (++gAllocRecordHead == gAllocRecordMax) { |
| gAllocRecordHead = 0; |
| } |
| |
| // Fill in the basics. |
| AllocRecord* record = &recent_allocation_records_[gAllocRecordHead]; |
| record->type = type; |
| record->byte_count = byte_count; |
| record->thin_lock_id = self->GetThreadId(); |
| |
| // Fill in the stack trace. |
| AllocRecordStackVisitor visitor(self, record); |
| visitor.WalkStack(); |
| |
| if (gAllocRecordCount < gAllocRecordMax) { |
| ++gAllocRecordCount; |
| } |
| } |
| |
| // Returns the index of the head element. |
| // |
| // We point at the most-recently-written record, so if gAllocRecordCount is 1 |
| // we want to use the current element. Take "head+1" and subtract count |
| // from it. |
| // |
| // We need to handle underflow in our circular buffer, so we add |
| // gAllocRecordMax and then mask it back down. |
| static inline int HeadIndex() EXCLUSIVE_LOCKS_REQUIRED(gAllocTrackerLock) { |
| return (gAllocRecordHead+1 + gAllocRecordMax - gAllocRecordCount) & (gAllocRecordMax-1); |
| } |
| |
| void Dbg::DumpRecentAllocations() { |
| ScopedObjectAccess soa(Thread::Current()); |
| MutexLock mu(soa.Self(), gAllocTrackerLock); |
| if (recent_allocation_records_ == NULL) { |
| LOG(INFO) << "Not recording tracked allocations"; |
| return; |
| } |
| |
| // "i" is the head of the list. We want to start at the end of the |
| // list and move forward to the tail. |
| size_t i = HeadIndex(); |
| size_t count = gAllocRecordCount; |
| |
| LOG(INFO) << "Tracked allocations, (head=" << gAllocRecordHead << " count=" << count << ")"; |
| while (count--) { |
| AllocRecord* record = &recent_allocation_records_[i]; |
| |
| LOG(INFO) << StringPrintf(" Thread %-2d %6zd bytes ", record->thin_lock_id, record->byte_count) |
| << PrettyClass(record->type); |
| |
| for (size_t stack_frame = 0; stack_frame < kMaxAllocRecordStackDepth; ++stack_frame) { |
| const mirror::ArtMethod* m = record->stack[stack_frame].method; |
| if (m == NULL) { |
| break; |
| } |
| LOG(INFO) << " " << PrettyMethod(m) << " line " << record->stack[stack_frame].LineNumber(); |
| } |
| |
| // pause periodically to help logcat catch up |
| if ((count % 5) == 0) { |
| usleep(40000); |
| } |
| |
| i = (i + 1) & (gAllocRecordMax-1); |
| } |
| } |
| |
| class StringTable { |
| public: |
| StringTable() { |
| } |
| |
| void Add(const char* s) { |
| table_.insert(s); |
| } |
| |
| size_t IndexOf(const char* s) const { |
| auto it = table_.find(s); |
| if (it == table_.end()) { |
| LOG(FATAL) << "IndexOf(\"" << s << "\") failed"; |
| } |
| return std::distance(table_.begin(), it); |
| } |
| |
| size_t Size() const { |
| return table_.size(); |
| } |
| |
| void WriteTo(std::vector<uint8_t>& bytes) const { |
| for (const std::string& str : table_) { |
| const char* s = str.c_str(); |
| size_t s_len = CountModifiedUtf8Chars(s); |
| UniquePtr<uint16_t> s_utf16(new uint16_t[s_len]); |
| ConvertModifiedUtf8ToUtf16(s_utf16.get(), s); |
| JDWP::AppendUtf16BE(bytes, s_utf16.get(), s_len); |
| } |
| } |
| |
| private: |
| std::set<std::string> table_; |
| DISALLOW_COPY_AND_ASSIGN(StringTable); |
| }; |
| |
| /* |
| * The data we send to DDMS contains everything we have recorded. |
| * |
| * Message header (all values big-endian): |
| * (1b) message header len (to allow future expansion); includes itself |
| * (1b) entry header len |
| * (1b) stack frame len |
| * (2b) number of entries |
| * (4b) offset to string table from start of message |
| * (2b) number of class name strings |
| * (2b) number of method name strings |
| * (2b) number of source file name strings |
| * For each entry: |
| * (4b) total allocation size |
| * (2b) thread id |
| * (2b) allocated object's class name index |
| * (1b) stack depth |
| * For each stack frame: |
| * (2b) method's class name |
| * (2b) method name |
| * (2b) method source file |
| * (2b) line number, clipped to 32767; -2 if native; -1 if no source |
| * (xb) class name strings |
| * (xb) method name strings |
| * (xb) source file strings |
| * |
| * As with other DDM traffic, strings are sent as a 4-byte length |
| * followed by UTF-16 data. |
| * |
| * We send up 16-bit unsigned indexes into string tables. In theory there |
| * can be (kMaxAllocRecordStackDepth * gAllocRecordMax) unique strings in |
| * each table, but in practice there should be far fewer. |
| * |
| * The chief reason for using a string table here is to keep the size of |
| * the DDMS message to a minimum. This is partly to make the protocol |
| * efficient, but also because we have to form the whole thing up all at |
| * once in a memory buffer. |
| * |
| * We use separate string tables for class names, method names, and source |
| * files to keep the indexes small. There will generally be no overlap |
| * between the contents of these tables. |
| */ |
| jbyteArray Dbg::GetRecentAllocations() { |
| if (false) { |
| DumpRecentAllocations(); |
| } |
| |
| Thread* self = Thread::Current(); |
| std::vector<uint8_t> bytes; |
| { |
| MutexLock mu(self, gAllocTrackerLock); |
| // |
| // Part 1: generate string tables. |
| // |
| StringTable class_names; |
| StringTable method_names; |
| StringTable filenames; |
| |
| int count = gAllocRecordCount; |
| int idx = HeadIndex(); |
| while (count--) { |
| AllocRecord* record = &recent_allocation_records_[idx]; |
| |
| class_names.Add(ClassHelper(record->type).GetDescriptor()); |
| |
| MethodHelper mh; |
| for (size_t i = 0; i < kMaxAllocRecordStackDepth; i++) { |
| mirror::ArtMethod* m = record->stack[i].method; |
| if (m != NULL) { |
| mh.ChangeMethod(m); |
| class_names.Add(mh.GetDeclaringClassDescriptor()); |
| method_names.Add(mh.GetName()); |
| filenames.Add(mh.GetDeclaringClassSourceFile()); |
| } |
| } |
| |
| idx = (idx + 1) & (gAllocRecordMax-1); |
| } |
| |
| LOG(INFO) << "allocation records: " << gAllocRecordCount; |
| |
| // |
| // Part 2: Generate the output and store it in the buffer. |
| // |
| |
| // (1b) message header len (to allow future expansion); includes itself |
| // (1b) entry header len |
| // (1b) stack frame len |
| const int kMessageHeaderLen = 15; |
| const int kEntryHeaderLen = 9; |
| const int kStackFrameLen = 8; |
| JDWP::Append1BE(bytes, kMessageHeaderLen); |
| JDWP::Append1BE(bytes, kEntryHeaderLen); |
| JDWP::Append1BE(bytes, kStackFrameLen); |
| |
| // (2b) number of entries |
| // (4b) offset to string table from start of message |
| // (2b) number of class name strings |
| // (2b) number of method name strings |
| // (2b) number of source file name strings |
| JDWP::Append2BE(bytes, gAllocRecordCount); |
| size_t string_table_offset = bytes.size(); |
| JDWP::Append4BE(bytes, 0); // We'll patch this later... |
| JDWP::Append2BE(bytes, class_names.Size()); |
| JDWP::Append2BE(bytes, method_names.Size()); |
| JDWP::Append2BE(bytes, filenames.Size()); |
| |
| count = gAllocRecordCount; |
| idx = HeadIndex(); |
| while (count--) { |
| // For each entry: |
| // (4b) total allocation size |
| // (2b) thread id |
| // (2b) allocated object's class name index |
| // (1b) stack depth |
| AllocRecord* record = &recent_allocation_records_[idx]; |
| size_t stack_depth = record->GetDepth(); |
| ClassHelper kh(record->type); |
| size_t allocated_object_class_name_index = class_names.IndexOf(kh.GetDescriptor()); |
| JDWP::Append4BE(bytes, record->byte_count); |
| JDWP::Append2BE(bytes, record->thin_lock_id); |
| JDWP::Append2BE(bytes, allocated_object_class_name_index); |
| JDWP::Append1BE(bytes, stack_depth); |
| |
| MethodHelper mh; |
| for (size_t stack_frame = 0; stack_frame < stack_depth; ++stack_frame) { |
| // For each stack frame: |
| // (2b) method's class name |
| // (2b) method name |
| // (2b) method source file |
| // (2b) line number, clipped to 32767; -2 if native; -1 if no source |
| mh.ChangeMethod(record->stack[stack_frame].method); |
| size_t class_name_index = class_names.IndexOf(mh.GetDeclaringClassDescriptor()); |
| size_t method_name_index = method_names.IndexOf(mh.GetName()); |
| size_t file_name_index = filenames.IndexOf(mh.GetDeclaringClassSourceFile()); |
| JDWP::Append2BE(bytes, class_name_index); |
| JDWP::Append2BE(bytes, method_name_index); |
| JDWP::Append2BE(bytes, file_name_index); |
| JDWP::Append2BE(bytes, record->stack[stack_frame].LineNumber()); |
| } |
| |
| idx = (idx + 1) & (gAllocRecordMax-1); |
| } |
| |
| // (xb) class name strings |
| // (xb) method name strings |
| // (xb) source file strings |
| JDWP::Set4BE(&bytes[string_table_offset], bytes.size()); |
| class_names.WriteTo(bytes); |
| method_names.WriteTo(bytes); |
| filenames.WriteTo(bytes); |
| } |
| JNIEnv* env = self->GetJniEnv(); |
| jbyteArray result = env->NewByteArray(bytes.size()); |
| if (result != NULL) { |
| env->SetByteArrayRegion(result, 0, bytes.size(), reinterpret_cast<const jbyte*>(&bytes[0])); |
| } |
| return result; |
| } |
| |
| } // namespace art |