Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Andreas Gampe | 277ccbd | 2014-11-03 21:36:10 -0800 | [diff] [blame] | 17 | #include "dalvik_system_VMStack.h" |
| 18 | |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 19 | #include "art_method-inl.h" |
Elliott Hughes | eac7667 | 2012-05-24 21:56:51 -0700 | [diff] [blame] | 20 | #include "jni_internal.h" |
Elliott Hughes | 6a14433 | 2012-04-03 13:07:11 -0700 | [diff] [blame] | 21 | #include "nth_caller_visitor.h" |
Ian Rogers | 4f6ad8a | 2013-03-18 15:27:28 -0700 | [diff] [blame] | 22 | #include "mirror/class-inl.h" |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 23 | #include "mirror/class_loader.h" |
Ian Rogers | 4f6ad8a | 2013-03-18 15:27:28 -0700 | [diff] [blame] | 24 | #include "mirror/object-inl.h" |
Ian Rogers | 1eb512d | 2013-10-18 15:42:20 -0700 | [diff] [blame] | 25 | #include "scoped_fast_native_object_access.h" |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 26 | #include "scoped_thread_state_change.h" |
Elliott Hughes | 01158d7 | 2011-09-19 19:47:10 -0700 | [diff] [blame] | 27 | #include "thread_list.h" |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 28 | |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 29 | namespace art { |
| 30 | |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 31 | static jobject GetThreadStack(const ScopedFastNativeObjectAccess& soa, jobject peer) |
Mathieu Chartier | 9044347 | 2015-07-16 20:32:27 -0700 | [diff] [blame] | 32 | SHARED_REQUIRES(Locks::mutator_lock_) { |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 33 | jobject trace = nullptr; |
| 34 | if (soa.Decode<mirror::Object*>(peer) == soa.Self()->GetPeer()) { |
Sebastien Hertz | ee1d79a | 2014-02-21 15:46:30 +0100 | [diff] [blame] | 35 | trace = soa.Self()->CreateInternalStackTrace<false>(soa); |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 36 | } else { |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 37 | // Suspend thread to build stack trace. |
Mathieu Chartier | f1d666e | 2015-09-03 16:13:34 -0700 | [diff] [blame^] | 38 | ScopedThreadSuspension sts(soa.Self(), kSuspended); |
Brian Carlstrom | ba32de4 | 2014-08-27 23:43:46 -0700 | [diff] [blame] | 39 | ThreadList* thread_list = Runtime::Current()->GetThreadList(); |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 40 | bool timed_out; |
Ian Rogers | 4ad5cd3 | 2014-11-11 23:08:07 -0800 | [diff] [blame] | 41 | Thread* thread = thread_list->SuspendThreadByPeer(peer, true, false, &timed_out); |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 42 | if (thread != nullptr) { |
| 43 | // Must be runnable to create returned array. |
Mathieu Chartier | f1d666e | 2015-09-03 16:13:34 -0700 | [diff] [blame^] | 44 | { |
| 45 | ScopedObjectAccess soa2(soa.Self()); |
| 46 | trace = thread->CreateInternalStackTrace<false>(soa); |
| 47 | } |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 48 | // Restart suspended thread. |
Brian Carlstrom | ba32de4 | 2014-08-27 23:43:46 -0700 | [diff] [blame] | 49 | thread_list->Resume(thread, false); |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 50 | } else { |
| 51 | if (timed_out) { |
| 52 | LOG(ERROR) << "Trying to get thread's stack failed as the thread failed to suspend within a " |
| 53 | "generous timeout."; |
| 54 | } |
Ian Rogers | 15bf2d3 | 2012-08-28 17:33:04 -0700 | [diff] [blame] | 55 | } |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 56 | } |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 57 | return trace; |
Elliott Hughes | 01158d7 | 2011-09-19 19:47:10 -0700 | [diff] [blame] | 58 | } |
| 59 | |
Ian Rogers | 306057f | 2012-11-26 12:45:53 -0800 | [diff] [blame] | 60 | static jint VMStack_fillStackTraceElements(JNIEnv* env, jclass, jobject javaThread, |
| 61 | jobjectArray javaSteArray) { |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 62 | ScopedFastNativeObjectAccess soa(env); |
| 63 | jobject trace = GetThreadStack(soa, javaThread); |
| 64 | if (trace == nullptr) { |
Elliott Hughes | 01158d7 | 2011-09-19 19:47:10 -0700 | [diff] [blame] | 65 | return 0; |
| 66 | } |
| 67 | int32_t depth; |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 68 | Thread::InternalStackTraceToStackTraceElementArray(soa, trace, javaSteArray, &depth); |
Elliott Hughes | 01158d7 | 2011-09-19 19:47:10 -0700 | [diff] [blame] | 69 | return depth; |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 70 | } |
| 71 | |
Elliott Hughes | 6a14433 | 2012-04-03 13:07:11 -0700 | [diff] [blame] | 72 | // Returns the defining class loader of the caller's caller. |
Elliott Hughes | 0512f02 | 2012-03-15 22:10:52 -0700 | [diff] [blame] | 73 | static jobject VMStack_getCallingClassLoader(JNIEnv* env, jclass) { |
Ian Rogers | 1eb512d | 2013-10-18 15:42:20 -0700 | [diff] [blame] | 74 | ScopedFastNativeObjectAccess soa(env); |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 75 | NthCallerVisitor visitor(soa.Self(), 2); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 76 | visitor.WalkStack(); |
Andreas Gampe | 718ac65 | 2014-08-11 18:51:53 -0700 | [diff] [blame] | 77 | if (UNLIKELY(visitor.caller == nullptr)) { |
| 78 | // The caller is an attached native thread. |
| 79 | return nullptr; |
| 80 | } |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 81 | return soa.AddLocalReference<jobject>(visitor.caller->GetDeclaringClass()->GetClassLoader()); |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 82 | } |
| 83 | |
Brian Carlstrom | 5988547 | 2015-04-20 21:55:19 -0700 | [diff] [blame] | 84 | static jobject VMStack_getClosestUserClassLoader(JNIEnv* env, jclass) { |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 85 | struct ClosestUserClassLoaderVisitor : public StackVisitor { |
Brian Carlstrom | 5988547 | 2015-04-20 21:55:19 -0700 | [diff] [blame] | 86 | explicit ClosestUserClassLoaderVisitor(Thread* thread) |
Nicolas Geoffray | 8e5bd18 | 2015-05-06 11:34:34 +0100 | [diff] [blame] | 87 | : StackVisitor(thread, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames), |
| 88 | class_loader(nullptr) {} |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 89 | |
Mathieu Chartier | 9044347 | 2015-07-16 20:32:27 -0700 | [diff] [blame] | 90 | bool VisitFrame() SHARED_REQUIRES(Locks::mutator_lock_) { |
Brian Carlstrom | 5988547 | 2015-04-20 21:55:19 -0700 | [diff] [blame] | 91 | DCHECK(class_loader == nullptr); |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 92 | mirror::Class* c = GetMethod()->GetDeclaringClass(); |
Mathieu Chartier | e401d14 | 2015-04-22 13:56:20 -0700 | [diff] [blame] | 93 | // c is null for runtime methods. |
| 94 | if (c != nullptr) { |
| 95 | mirror::Object* cl = c->GetClassLoader(); |
| 96 | if (cl != nullptr) { |
| 97 | class_loader = cl; |
| 98 | return false; |
| 99 | } |
Brian Carlstrom | 5cb71bb | 2012-03-09 14:57:37 -0800 | [diff] [blame] | 100 | } |
Elliott Hughes | 530fa00 | 2012-03-12 11:44:49 -0700 | [diff] [blame] | 101 | return true; |
Brian Carlstrom | 5cb71bb | 2012-03-09 14:57:37 -0800 | [diff] [blame] | 102 | } |
Elliott Hughes | 08fc03a | 2012-06-26 17:34:00 -0700 | [diff] [blame] | 103 | |
Ian Rogers | 2dd0e2c | 2013-01-24 12:42:14 -0800 | [diff] [blame] | 104 | mirror::Object* class_loader; |
Brian Carlstrom | 5cb71bb | 2012-03-09 14:57:37 -0800 | [diff] [blame] | 105 | }; |
Ian Rogers | 1eb512d | 2013-10-18 15:42:20 -0700 | [diff] [blame] | 106 | ScopedFastNativeObjectAccess soa(env); |
Brian Carlstrom | 5988547 | 2015-04-20 21:55:19 -0700 | [diff] [blame] | 107 | ClosestUserClassLoaderVisitor visitor(soa.Self()); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 108 | visitor.WalkStack(); |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 109 | return soa.AddLocalReference<jobject>(visitor.class_loader); |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 110 | } |
| 111 | |
Elliott Hughes | 6a14433 | 2012-04-03 13:07:11 -0700 | [diff] [blame] | 112 | // Returns the class of the caller's caller's caller. |
Elliott Hughes | 0512f02 | 2012-03-15 22:10:52 -0700 | [diff] [blame] | 113 | static jclass VMStack_getStackClass2(JNIEnv* env, jclass) { |
Ian Rogers | 1eb512d | 2013-10-18 15:42:20 -0700 | [diff] [blame] | 114 | ScopedFastNativeObjectAccess soa(env); |
Ian Rogers | 7a22fa6 | 2013-01-23 12:16:16 -0800 | [diff] [blame] | 115 | NthCallerVisitor visitor(soa.Self(), 3); |
Ian Rogers | 0399dde | 2012-06-06 17:09:28 -0700 | [diff] [blame] | 116 | visitor.WalkStack(); |
Andreas Gampe | 0d334ce | 2014-08-13 23:05:38 -0700 | [diff] [blame] | 117 | if (UNLIKELY(visitor.caller == nullptr)) { |
| 118 | // The caller is an attached native thread. |
| 119 | return nullptr; |
| 120 | } |
Ian Rogers | 00f7d0e | 2012-07-19 15:28:27 -0700 | [diff] [blame] | 121 | return soa.AddLocalReference<jclass>(visitor.caller->GetDeclaringClass()); |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 122 | } |
| 123 | |
Elliott Hughes | 0512f02 | 2012-03-15 22:10:52 -0700 | [diff] [blame] | 124 | static jobjectArray VMStack_getThreadStackTrace(JNIEnv* env, jclass, jobject javaThread) { |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 125 | ScopedFastNativeObjectAccess soa(env); |
| 126 | jobject trace = GetThreadStack(soa, javaThread); |
| 127 | if (trace == nullptr) { |
| 128 | return nullptr; |
Elliott Hughes | 01158d7 | 2011-09-19 19:47:10 -0700 | [diff] [blame] | 129 | } |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 130 | return Thread::InternalStackTraceToStackTraceElementArray(soa, trace); |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | static JNINativeMethod gMethods[] = { |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 134 | NATIVE_METHOD(VMStack, fillStackTraceElements, "!(Ljava/lang/Thread;[Ljava/lang/StackTraceElement;)I"), |
Ian Rogers | 1eb512d | 2013-10-18 15:42:20 -0700 | [diff] [blame] | 135 | NATIVE_METHOD(VMStack, getCallingClassLoader, "!()Ljava/lang/ClassLoader;"), |
Brian Carlstrom | 5988547 | 2015-04-20 21:55:19 -0700 | [diff] [blame] | 136 | NATIVE_METHOD(VMStack, getClosestUserClassLoader, "!()Ljava/lang/ClassLoader;"), |
Ian Rogers | 1eb512d | 2013-10-18 15:42:20 -0700 | [diff] [blame] | 137 | NATIVE_METHOD(VMStack, getStackClass2, "!()Ljava/lang/Class;"), |
Ian Rogers | 53b8b09 | 2014-03-13 23:45:53 -0700 | [diff] [blame] | 138 | NATIVE_METHOD(VMStack, getThreadStackTrace, "!(Ljava/lang/Thread;)[Ljava/lang/StackTraceElement;"), |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 139 | }; |
| 140 | |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 141 | void register_dalvik_system_VMStack(JNIEnv* env) { |
Elliott Hughes | eac7667 | 2012-05-24 21:56:51 -0700 | [diff] [blame] | 142 | REGISTER_NATIVE_METHODS("dalvik/system/VMStack"); |
Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame] | 143 | } |
| 144 | |
| 145 | } // namespace art |