1 /*
2 * Copyright (C) 2011 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 <string_view>
18
19 #include "art_method-inl.h"
20 #include "check_reference_map_visitor.h"
21 #include "jni.h"
22
23 namespace art {
24
25 #define CHECK_REGS_ARE_REFERENCES(...) do { \
26 int t[] = {__VA_ARGS__}; \
27 int t_size = sizeof(t) / sizeof(*t); \
28 CheckReferences( \
29 t, t_size, GetDexPc(), GetNativePcOffset(), /* search_for_valid_sack_map= */ false); \
30 } while (false);
31
32 static int gJava_StackWalk_refmap_calls = 0;
33
34 class TestReferenceMapVisitor : public CheckReferenceMapVisitor {
35 public:
REQUIRES_SHARED(Locks::mutator_lock_)36 explicit TestReferenceMapVisitor(Thread* thread) REQUIRES_SHARED(Locks::mutator_lock_)
37 : CheckReferenceMapVisitor(thread) {}
38
VisitFrame()39 bool VisitFrame() override REQUIRES_SHARED(Locks::mutator_lock_) {
40 if (CheckReferenceMapVisitor::VisitFrame()) {
41 return true;
42 }
43 ArtMethod* m = GetMethod();
44 std::string_view m_name(m->GetName());
45
46 // Given the method name and the number of times the method has been called,
47 // we know the Dex registers with live reference values. Assert that what we
48 // find is what is expected.
49 if (m_name == "$noinline$f") {
50 if (gJava_StackWalk_refmap_calls == 1) {
51 CHECK_EQ(1U, GetDexPc());
52 CHECK_REGS_ARE_REFERENCES(1);
53 } else {
54 CHECK_EQ(gJava_StackWalk_refmap_calls, 2);
55 CHECK_EQ(5U, GetDexPc());
56 CHECK_REGS_ARE_REFERENCES(1);
57 }
58 found_f_ = true;
59 } else if (m_name == "$noinline$g") {
60 if (gJava_StackWalk_refmap_calls == 1) {
61 CHECK_EQ(0xcU, GetDexPc());
62 CHECK_REGS_ARE_REFERENCES(0, 2); // Note that v1 is not in the minimal root set
63 } else {
64 CHECK_EQ(gJava_StackWalk_refmap_calls, 2);
65 CHECK_EQ(0xcU, GetDexPc());
66 CHECK_REGS_ARE_REFERENCES(0, 2);
67 }
68 found_g_ = true;
69 } else if (m_name == "shlemiel") {
70 if (gJava_StackWalk_refmap_calls == 1) {
71 CHECK_EQ(0x380U, GetDexPc());
72 CHECK_REGS_ARE_REFERENCES(2, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 21, 25);
73 } else {
74 CHECK_EQ(gJava_StackWalk_refmap_calls, 2);
75 CHECK_EQ(0x380U, GetDexPc());
76 CHECK_REGS_ARE_REFERENCES(2, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 21, 25);
77 }
78 found_shlemiel_ = true;
79 }
80
81 return true;
82 }
83
~TestReferenceMapVisitor()84 ~TestReferenceMapVisitor() {
85 }
86
87 bool found_f_ = false;
88 bool found_g_ = false;
89 bool found_shlemiel_ = false;
90 };
91
Java_Main_testStackWalk(JNIEnv *,jobject,jint count)92 extern "C" JNIEXPORT jint JNICALL Java_Main_testStackWalk(JNIEnv*, jobject, jint count) {
93 ScopedObjectAccess soa(Thread::Current());
94 CHECK_EQ(count, 0);
95 gJava_StackWalk_refmap_calls++;
96
97 // Visitor
98 TestReferenceMapVisitor mapper(soa.Self());
99 mapper.WalkStack();
100 CHECK(mapper.found_f_);
101 CHECK(mapper.found_g_);
102 CHECK(mapper.found_shlemiel_);
103
104 return count + 1;
105 }
106
107 } // namespace art
108