ART: Add GetStackTrace support
Add support for getting a stack trace.
Bug: 31684812
Test: m test-art-host
Change-Id: Ifa5818ebca38caafb09616ffd7df30186eb8a06f
diff --git a/runtime/openjdkjvmti/ti_stack.cc b/runtime/openjdkjvmti/ti_stack.cc
new file mode 100644
index 0000000..33e677f
--- /dev/null
+++ b/runtime/openjdkjvmti/ti_stack.cc
@@ -0,0 +1,195 @@
+/* Copyright (C) 2016 The Android Open Source Project
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This file implements interfaces from the file jvmti.h. This implementation
+ * is licensed under the same terms as the file jvmti.h. The
+ * copyright and license information for the file jvmti.h follows.
+ *
+ * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "ti_stack.h"
+
+#include "art_jvmti.h"
+#include "art_method-inl.h"
+#include "base/enums.h"
+#include "dex_file.h"
+#include "dex_file_annotations.h"
+#include "jni_env_ext.h"
+#include "mirror/class.h"
+#include "mirror/dex_cache.h"
+#include "scoped_thread_state_change-inl.h"
+#include "stack.h"
+#include "thread.h"
+#include "thread_pool.h"
+
+namespace openjdkjvmti {
+
+struct GetStackTraceVisitor : public art::StackVisitor {
+ GetStackTraceVisitor(art::Thread* thread_in,
+ art::ScopedObjectAccessAlreadyRunnable& soa_,
+ size_t start_,
+ size_t stop_)
+ : StackVisitor(thread_in, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
+ soa(soa_),
+ start(start_),
+ stop(stop_) {}
+
+ bool VisitFrame() REQUIRES_SHARED(art::Locks::mutator_lock_) {
+ art::ArtMethod* m = GetMethod();
+ if (m->IsRuntimeMethod()) {
+ return true;
+ }
+
+ if (start == 0) {
+ m = m->GetInterfaceMethodIfProxy(art::kRuntimePointerSize);
+ jmethodID id = soa.EncodeMethod(m);
+
+ art::mirror::DexCache* dex_cache = m->GetDexCache();
+ int32_t line_number = -1;
+ if (dex_cache != nullptr) { // be tolerant of bad input
+ const art::DexFile* dex_file = dex_cache->GetDexFile();
+ line_number = art::annotations::GetLineNumFromPC(dex_file, m, GetDexPc(false));
+ }
+
+ jvmtiFrameInfo info = { id, static_cast<jlong>(line_number) };
+ frames.push_back(info);
+
+ if (stop == 1) {
+ return false; // We're done.
+ } else if (stop > 0) {
+ stop--;
+ }
+ } else {
+ start--;
+ }
+
+ return true;
+ }
+
+ art::ScopedObjectAccessAlreadyRunnable& soa;
+ std::vector<jvmtiFrameInfo> frames;
+ size_t start;
+ size_t stop;
+};
+
+struct GetStackTraceClosure : public art::Closure {
+ public:
+ GetStackTraceClosure(size_t start, size_t stop)
+ : start_input(start),
+ stop_input(stop),
+ start_result(0),
+ stop_result(0) {}
+
+ void Run(art::Thread* self) OVERRIDE {
+ art::ScopedObjectAccess soa(art::Thread::Current());
+
+ GetStackTraceVisitor visitor(self, soa, start_input, stop_input);
+ visitor.WalkStack(false);
+
+ frames.swap(visitor.frames);
+ start_result = visitor.start;
+ stop_result = visitor.stop;
+ }
+
+ const size_t start_input;
+ const size_t stop_input;
+
+ std::vector<jvmtiFrameInfo> frames;
+ size_t start_result;
+ size_t stop_result;
+};
+
+jvmtiError StackUtil::GetStackTrace(jvmtiEnv* jvmti_env ATTRIBUTE_UNUSED,
+ jthread java_thread,
+ jint start_depth,
+ jint max_frame_count,
+ jvmtiFrameInfo* frame_buffer,
+ jint* count_ptr) {
+ if (java_thread == nullptr) {
+ return ERR(INVALID_THREAD);
+ }
+
+ art::Thread* thread;
+ {
+ // TODO: Need non-aborting call here, to return JVMTI_ERROR_INVALID_THREAD.
+ art::ScopedObjectAccess soa(art::Thread::Current());
+ art::MutexLock mu(soa.Self(), *art::Locks::thread_list_lock_);
+ thread = art::Thread::FromManagedThread(soa, java_thread);
+ DCHECK(thread != nullptr);
+ }
+
+ art::ThreadState state = thread->GetState();
+ if (state == art::ThreadState::kStarting ||
+ state == art::ThreadState::kTerminated ||
+ thread->IsStillStarting()) {
+ return ERR(THREAD_NOT_ALIVE);
+ }
+
+ if (max_frame_count < 0) {
+ return ERR(ILLEGAL_ARGUMENT);
+ }
+ if (frame_buffer == nullptr || count_ptr == nullptr) {
+ return ERR(NULL_POINTER);
+ }
+
+ if (max_frame_count == 0) {
+ *count_ptr = 0;
+ return ERR(NONE);
+ }
+
+ GetStackTraceClosure closure(start_depth >= 0 ? static_cast<size_t>(start_depth) : 0,
+ start_depth >= 0 ?static_cast<size_t>(max_frame_count) : 0);
+ thread->RequestSynchronousCheckpoint(&closure);
+
+ size_t collected_frames = closure.frames.size();
+
+ // Frames from the top.
+ if (start_depth >= 0) {
+ if (closure.start_result != 0) {
+ // Not enough frames.
+ return ERR(ILLEGAL_ARGUMENT);
+ }
+ DCHECK_LE(collected_frames, static_cast<size_t>(max_frame_count));
+ if (closure.frames.size() > 0) {
+ memcpy(frame_buffer, closure.frames.data(), collected_frames * sizeof(jvmtiFrameInfo));
+ }
+ *count_ptr = static_cast<jint>(closure.frames.size());
+ return ERR(NONE);
+ }
+
+ // Frames from the bottom.
+ if (collected_frames < static_cast<size_t>(-start_depth)) {
+ return ERR(ILLEGAL_ARGUMENT);
+ }
+
+ size_t count = std::min(static_cast<size_t>(-start_depth), static_cast<size_t>(max_frame_count));
+ memcpy(frame_buffer,
+ &closure.frames.data()[collected_frames + start_depth],
+ count * sizeof(jvmtiFrameInfo));
+ *count_ptr = static_cast<jint>(count);
+ return ERR(NONE);
+}
+
+} // namespace openjdkjvmti