1 /*
2 * Copyright (C) 2017 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 "common_runtime_test.h"
18
19 #include "class_linker.h"
20 #include "handle_scope-inl.h"
21 #include "mirror/object-inl.h"
22 #include "mirror/object_array-inl.h"
23 #include "mirror/string.h"
24 #include "runtime.h"
25 #include "scoped_thread_state_change-inl.h"
26 #include "verification.h"
27
28 namespace art {
29 namespace gc {
30
31 class VerificationTest : public CommonRuntimeTest {
32 protected:
VerificationTest()33 VerificationTest() {}
34
35 template <class T>
AllocObjectArray(Thread * self,size_t length)36 mirror::ObjectArray<T>* AllocObjectArray(Thread* self, size_t length)
37 REQUIRES_SHARED(Locks::mutator_lock_) {
38 ClassLinker* const class_linker = Runtime::Current()->GetClassLinker();
39 return mirror::ObjectArray<T>::Alloc(
40 self,
41 class_linker->GetClassRoot(ClassLinker::ClassRoot::kObjectArrayClass),
42 length);
43 }
44 };
45
TEST_F(VerificationTest,IsValidHeapObjectAddress)46 TEST_F(VerificationTest, IsValidHeapObjectAddress) {
47 ScopedObjectAccess soa(Thread::Current());
48 const Verification* const v = Runtime::Current()->GetHeap()->GetVerification();
49 EXPECT_FALSE(v->IsValidHeapObjectAddress(reinterpret_cast<const void*>(1)));
50 EXPECT_FALSE(v->IsValidHeapObjectAddress(reinterpret_cast<const void*>(4)));
51 EXPECT_FALSE(v->IsValidHeapObjectAddress(nullptr));
52 VariableSizedHandleScope hs(soa.Self());
53 Handle<mirror::String> string(
54 hs.NewHandle(mirror::String::AllocFromModifiedUtf8(soa.Self(), "test")));
55 EXPECT_TRUE(v->IsValidHeapObjectAddress(string.Get()));
56 EXPECT_TRUE(v->IsValidHeapObjectAddress(string->GetClass()));
57 const uintptr_t uint_klass = reinterpret_cast<uintptr_t>(string->GetClass());
58 // Not actually a valid object but the verification can't know that. Guaranteed to be inside a
59 // heap space.
60 EXPECT_TRUE(v->IsValidHeapObjectAddress(
61 reinterpret_cast<const void*>(uint_klass + kObjectAlignment)));
62 EXPECT_FALSE(v->IsValidHeapObjectAddress(
63 reinterpret_cast<const void*>(&uint_klass)));
64 }
65
TEST_F(VerificationTest,IsValidClass)66 TEST_F(VerificationTest, IsValidClass) {
67 ScopedObjectAccess soa(Thread::Current());
68 VariableSizedHandleScope hs(soa.Self());
69 Handle<mirror::String> string(
70 hs.NewHandle(mirror::String::AllocFromModifiedUtf8(soa.Self(), "test")));
71 const Verification* const v = Runtime::Current()->GetHeap()->GetVerification();
72 EXPECT_FALSE(v->IsValidClass(reinterpret_cast<const void*>(1)));
73 EXPECT_FALSE(v->IsValidClass(reinterpret_cast<const void*>(4)));
74 EXPECT_FALSE(v->IsValidClass(nullptr));
75 EXPECT_FALSE(v->IsValidClass(string.Get()));
76 EXPECT_TRUE(v->IsValidClass(string->GetClass()));
77 const uintptr_t uint_klass = reinterpret_cast<uintptr_t>(string->GetClass());
78 EXPECT_FALSE(v->IsValidClass(reinterpret_cast<const void*>(uint_klass - kObjectAlignment)));
79 EXPECT_FALSE(v->IsValidClass(reinterpret_cast<const void*>(&uint_klass)));
80 }
81
TEST_F(VerificationTest,DumpObjectInfo)82 TEST_F(VerificationTest, DumpObjectInfo) {
83 ScopedLogSeverity sls(LogSeverity::INFO);
84 ScopedObjectAccess soa(Thread::Current());
85 Runtime* const runtime = Runtime::Current();
86 VariableSizedHandleScope hs(soa.Self());
87 Handle<mirror::String> string(
88 hs.NewHandle(mirror::String::AllocFromModifiedUtf8(soa.Self(), "obj")));
89 Handle<mirror::ObjectArray<mirror::Object>> arr(
90 hs.NewHandle(AllocObjectArray<mirror::Object>(soa.Self(), 256)));
91 const Verification* const v = runtime->GetHeap()->GetVerification();
92 LOG(INFO) << v->DumpObjectInfo(reinterpret_cast<const void*>(1), "obj");
93 LOG(INFO) << v->DumpObjectInfo(reinterpret_cast<const void*>(4), "obj");
94 LOG(INFO) << v->DumpObjectInfo(nullptr, "obj");
95 LOG(INFO) << v->DumpObjectInfo(string.Get(), "test");
96 LOG(INFO) << v->DumpObjectInfo(string->GetClass(), "obj");
97 const uintptr_t uint_klass = reinterpret_cast<uintptr_t>(string->GetClass());
98 LOG(INFO) << v->DumpObjectInfo(reinterpret_cast<const void*>(uint_klass - kObjectAlignment),
99 "obj");
100 LOG(INFO) << v->DumpObjectInfo(reinterpret_cast<const void*>(&uint_klass), "obj");
101 LOG(INFO) << v->DumpObjectInfo(arr.Get(), "arr");
102 }
103
TEST_F(VerificationTest,LogHeapCorruption)104 TEST_F(VerificationTest, LogHeapCorruption) {
105 ScopedLogSeverity sls(LogSeverity::INFO);
106 ScopedObjectAccess soa(Thread::Current());
107 Runtime* const runtime = Runtime::Current();
108 VariableSizedHandleScope hs(soa.Self());
109 Handle<mirror::String> string(
110 hs.NewHandle(mirror::String::AllocFromModifiedUtf8(soa.Self(), "obj")));
111 using ObjArray = mirror::ObjectArray<mirror::Object>;
112 Handle<ObjArray> arr(
113 hs.NewHandle(AllocObjectArray<mirror::Object>(soa.Self(), 256)));
114 const Verification* const v = runtime->GetHeap()->GetVerification();
115 arr->Set(0, string.Get());
116 // Test normal cases.
117 v->LogHeapCorruption(arr.Get(), ObjArray::DataOffset(kHeapReferenceSize), string.Get(), false);
118 v->LogHeapCorruption(string.Get(), mirror::Object::ClassOffset(), string->GetClass(), false);
119 // Test null holder cases.
120 v->LogHeapCorruption(nullptr, MemberOffset(0), string.Get(), false);
121 v->LogHeapCorruption(nullptr, MemberOffset(0), arr.Get(), false);
122 }
123
124 } // namespace gc
125 } // namespace art
126