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 "jni.h"
18
19 #include "base/logging.h"
20 #include "dex_file-inl.h"
21 #include "jni_internal.h"
22 #include "mirror/class-inl.h"
23 #include "nth_caller_visitor.h"
24 #include "oat_file.h"
25 #include "runtime.h"
26 #include "scoped_thread_state_change-inl.h"
27 #include "stack.h"
28 #include "thread-inl.h"
29
30 namespace art {
31
32 static bool asserts_enabled = true;
33
34 // public static native void disableStackFrameAsserts();
35 // Note: to globally disable asserts in unsupported configurations.
36
Java_Main_disableStackFrameAsserts(JNIEnv * env ATTRIBUTE_UNUSED,jclass cls ATTRIBUTE_UNUSED)37 extern "C" JNIEXPORT void JNICALL Java_Main_disableStackFrameAsserts(JNIEnv* env ATTRIBUTE_UNUSED,
38 jclass cls ATTRIBUTE_UNUSED) {
39 asserts_enabled = false;
40 }
41
IsInterpreted(JNIEnv * env,jclass,size_t level)42 static jboolean IsInterpreted(JNIEnv* env, jclass, size_t level) {
43 ScopedObjectAccess soa(env);
44 NthCallerVisitor caller(soa.Self(), level, false);
45 caller.WalkStack();
46 CHECK(caller.caller != nullptr);
47 return caller.GetCurrentShadowFrame() != nullptr ? JNI_TRUE : JNI_FALSE;
48 }
49
50 // public static native boolean isInterpreted();
51
Java_Main_isInterpreted(JNIEnv * env,jclass klass)52 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpreted(JNIEnv* env, jclass klass) {
53 return IsInterpreted(env, klass, 1);
54 }
55
56 // public static native boolean isInterpreted(int depth);
57
Java_Main_isInterpretedAt(JNIEnv * env,jclass klass,jint depth)58 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpretedAt(JNIEnv* env,
59 jclass klass,
60 jint depth) {
61 return IsInterpreted(env, klass, depth);
62 }
63
64
65 // public static native boolean isInterpretedFunction(String smali);
66
67 // TODO Remove 'allow_runtime_frames' option once we have deoptimization through runtime frames.
68 struct MethodIsInterpretedVisitor : public StackVisitor {
69 public:
MethodIsInterpretedVisitorart::MethodIsInterpretedVisitor70 MethodIsInterpretedVisitor(Thread* thread, ArtMethod* goal, bool require_deoptable)
71 : StackVisitor(thread, nullptr, StackVisitor::StackWalkKind::kIncludeInlinedFrames),
72 goal_(goal),
73 method_is_interpreted_(true),
74 method_found_(false),
75 prev_was_runtime_(true),
76 require_deoptable_(require_deoptable) {}
77
VisitFrameart::MethodIsInterpretedVisitor78 virtual bool VisitFrame() OVERRIDE REQUIRES_SHARED(Locks::mutator_lock_) {
79 if (goal_ == GetMethod()) {
80 method_is_interpreted_ = (require_deoptable_ && prev_was_runtime_) || IsShadowFrame();
81 method_found_ = true;
82 return false;
83 }
84 prev_was_runtime_ = GetMethod()->IsRuntimeMethod();
85 return true;
86 }
87
IsInterpretedart::MethodIsInterpretedVisitor88 bool IsInterpreted() {
89 return method_is_interpreted_;
90 }
91
IsFoundart::MethodIsInterpretedVisitor92 bool IsFound() {
93 return method_found_;
94 }
95
96 private:
97 const ArtMethod* goal_;
98 bool method_is_interpreted_;
99 bool method_found_;
100 bool prev_was_runtime_;
101 bool require_deoptable_;
102 };
103
104 // TODO Remove 'require_deoptimizable' option once we have deoptimization through runtime frames.
Java_Main_isInterpretedFunction(JNIEnv * env,jclass klass ATTRIBUTE_UNUSED,jobject method,jboolean require_deoptimizable)105 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isInterpretedFunction(
106 JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jobject method, jboolean require_deoptimizable) {
107 // Return false if this seems to not be an ART runtime.
108 if (Runtime::Current() == nullptr) {
109 return JNI_FALSE;
110 }
111 if (method == nullptr) {
112 env->ThrowNew(env->FindClass("java/lang/NullPointerException"), "method is null!");
113 return JNI_FALSE;
114 }
115 jmethodID id = env->FromReflectedMethod(method);
116 if (id == nullptr) {
117 env->ThrowNew(env->FindClass("java/lang/Error"), "Unable to interpret method argument!");
118 return JNI_FALSE;
119 }
120 bool result;
121 bool found;
122 {
123 ScopedObjectAccess soa(env);
124 ArtMethod* goal = jni::DecodeArtMethod(id);
125 MethodIsInterpretedVisitor v(soa.Self(), goal, require_deoptimizable);
126 v.WalkStack();
127 bool enters_interpreter = Runtime::Current()->GetClassLinker()->IsQuickToInterpreterBridge(
128 goal->GetEntryPointFromQuickCompiledCode());
129 result = (v.IsInterpreted() || enters_interpreter);
130 found = v.IsFound();
131 }
132 if (!found) {
133 env->ThrowNew(env->FindClass("java/lang/Error"), "Unable to find given method in stack!");
134 return JNI_FALSE;
135 }
136 return result;
137 }
138
139 // public static native void assertIsInterpreted();
140
Java_Main_assertIsInterpreted(JNIEnv * env,jclass klass)141 extern "C" JNIEXPORT void JNICALL Java_Main_assertIsInterpreted(JNIEnv* env, jclass klass) {
142 if (asserts_enabled) {
143 CHECK(Java_Main_isInterpreted(env, klass));
144 }
145 }
146
IsManaged(JNIEnv * env,jclass,size_t level)147 static jboolean IsManaged(JNIEnv* env, jclass, size_t level) {
148 ScopedObjectAccess soa(env);
149 NthCallerVisitor caller(soa.Self(), level, false);
150 caller.WalkStack();
151 CHECK(caller.caller != nullptr);
152 return caller.GetCurrentShadowFrame() != nullptr ? JNI_FALSE : JNI_TRUE;
153 }
154
155 // public static native boolean isManaged();
156
Java_Main_isManaged(JNIEnv * env,jclass cls)157 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isManaged(JNIEnv* env, jclass cls) {
158 return IsManaged(env, cls, 1);
159 }
160
161 // public static native void assertIsManaged();
162
Java_Main_assertIsManaged(JNIEnv * env,jclass cls)163 extern "C" JNIEXPORT void JNICALL Java_Main_assertIsManaged(JNIEnv* env, jclass cls) {
164 if (asserts_enabled) {
165 CHECK(Java_Main_isManaged(env, cls));
166 }
167 }
168
169 // public static native boolean isCallerInterpreted();
170
Java_Main_isCallerInterpreted(JNIEnv * env,jclass klass)171 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isCallerInterpreted(JNIEnv* env, jclass klass) {
172 return IsInterpreted(env, klass, 2);
173 }
174
175 // public static native void assertCallerIsInterpreted();
176
Java_Main_assertCallerIsInterpreted(JNIEnv * env,jclass klass)177 extern "C" JNIEXPORT void JNICALL Java_Main_assertCallerIsInterpreted(JNIEnv* env, jclass klass) {
178 if (asserts_enabled) {
179 CHECK(Java_Main_isCallerInterpreted(env, klass));
180 }
181 }
182
183 // public static native boolean isCallerManaged();
184
Java_Main_isCallerManaged(JNIEnv * env,jclass cls)185 extern "C" JNIEXPORT jboolean JNICALL Java_Main_isCallerManaged(JNIEnv* env, jclass cls) {
186 return IsManaged(env, cls, 2);
187 }
188
189 // public static native void assertCallerIsManaged();
190
Java_Main_assertCallerIsManaged(JNIEnv * env,jclass cls)191 extern "C" JNIEXPORT void JNICALL Java_Main_assertCallerIsManaged(JNIEnv* env, jclass cls) {
192 if (asserts_enabled) {
193 CHECK(Java_Main_isCallerManaged(env, cls));
194 }
195 }
196
197 } // namespace art
198