1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "arch/context.h"
18#include "art_method-inl.h"
19#include "jni.h"
20#include "scoped_thread_state_change.h"
21#include "stack.h"
22#include "thread.h"
23
24namespace art {
25
26namespace {
27
28class TestVisitor : public StackVisitor {
29 public:
30  TestVisitor(const ScopedObjectAccess& soa, Context* context, jobject expected_value)
31      SHARED_REQUIRES(Locks::mutator_lock_)
32      : StackVisitor(soa.Self(), context, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
33        expected_value_(expected_value),
34        found_(false),
35        soa_(soa) {}
36
37  bool VisitFrame() SHARED_REQUIRES(Locks::mutator_lock_) {
38    ArtMethod* m = GetMethod();
39    std::string m_name(m->GetName());
40
41    if (m_name == "testCase") {
42      found_ = true;
43      uint32_t value = 0;
44      CHECK(GetVReg(m, 1, kReferenceVReg, &value));
45      CHECK_EQ(reinterpret_cast<mirror::Object*>(value),
46               soa_.Decode<mirror::Object*>(expected_value_));
47    }
48    return true;
49  }
50
51  jobject expected_value_;
52  bool found_;
53  const ScopedObjectAccess& soa_;
54};
55
56}  // namespace
57
58extern "C" JNIEXPORT void JNICALL Java_Main_lookForMyRegisters(JNIEnv*, jclass, jobject value) {
59  ScopedObjectAccess soa(Thread::Current());
60  std::unique_ptr<Context> context(Context::Create());
61  TestVisitor visitor(soa, context.get(), value);
62  visitor.WalkStack();
63  CHECK(visitor.found_);
64}
65
66}  // namespace art
67