get_reference_vreg_jni.cc revision 8e5bd18fc665d7ec5461ea068e98740a65da754c 
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 "jni.h"
19#include "mirror/art_method-inl.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(Thread* thread, Context* context, mirror::Object* this_value)
31      SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
32      : StackVisitor(thread, context, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
33        this_value_(this_value),
34        found_method_index_(0) {}
35
36  bool VisitFrame() SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
37    mirror::ArtMethod* m = GetMethod();
38    std::string m_name(m->GetName());
39
40    if (m_name.compare("testThisWithInstanceCall") == 0) {
41      found_method_index_ = 1;
42      uint32_t value = 0;
43      CHECK(GetVReg(m, 1, kReferenceVReg, &value));
44      CHECK_EQ(reinterpret_cast<mirror::Object*>(value), this_value_);
45      CHECK_EQ(GetThisObject(), this_value_);
46    } else if (m_name.compare("testThisWithStaticCall") == 0) {
47      found_method_index_ = 2;
48      uint32_t value = 0;
49      CHECK(GetVReg(m, 1, kReferenceVReg, &value));
50    } else if (m_name.compare("testParameter") == 0) {
51      found_method_index_ = 3;
52      uint32_t value = 0;
53      CHECK(GetVReg(m, 1, kReferenceVReg, &value));
54    } else if (m_name.compare("testObjectInScope") == 0) {
55      found_method_index_ = 4;
56      uint32_t value = 0;
57      CHECK(GetVReg(m, 0, kReferenceVReg, &value));
58    }
59
60    return true;
61  }
62
63  mirror::Object* this_value_;
64
65  // Value returned to Java to ensure the methods testSimpleVReg and testPairVReg
66  // have been found and tested.
67  jint found_method_index_;
68};
69
70extern "C" JNIEXPORT jint JNICALL Java_Main_doNativeCallRef(JNIEnv*, jobject value) {
71  ScopedObjectAccess soa(Thread::Current());
72  std::unique_ptr<Context> context(Context::Create());
73  TestVisitor visitor(soa.Self(), context.get(), soa.Decode<mirror::Object*>(value));
74  visitor.WalkStack();
75  return visitor.found_method_index_;
76}
77
78extern "C" JNIEXPORT jint JNICALL Java_Main_doStaticNativeCallRef(JNIEnv*, jclass) {
79  ScopedObjectAccess soa(Thread::Current());
80  std::unique_ptr<Context> context(Context::Create());
81  TestVisitor visitor(soa.Self(), context.get(), nullptr);
82  visitor.WalkStack();
83  return visitor.found_method_index_;
84}
85
86}  // namespace
87
88}  // namespace art
89