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