1 /*
2 * Copyright (C) 2008 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 <dlfcn.h>
18 #include <limits.h>
19 #include <unistd.h>
20
21 #include "gc/heap.h"
22 #include "jni_internal.h"
23 #include "mirror/class_loader.h"
24 #include "runtime.h"
25 #include "scoped_thread_state_change.h"
26 #include "ScopedUtfChars.h"
27
28 namespace art {
29
Runtime_gc(JNIEnv *,jclass)30 static void Runtime_gc(JNIEnv*, jclass) {
31 if (Runtime::Current()->IsExplicitGcDisabled()) {
32 LOG(INFO) << "Explicit GC skipped.";
33 return;
34 }
35 Runtime::Current()->GetHeap()->CollectGarbage(false);
36 }
37
Runtime_nativeExit(JNIEnv *,jclass,jint status)38 static void Runtime_nativeExit(JNIEnv*, jclass, jint status) {
39 Runtime::Current()->CallExitHook(status);
40 exit(status);
41 }
42
Runtime_nativeLoad(JNIEnv * env,jclass,jstring javaFilename,jobject javaLoader,jstring javaLdLibraryPath)43 static jstring Runtime_nativeLoad(JNIEnv* env, jclass, jstring javaFilename, jobject javaLoader, jstring javaLdLibraryPath) {
44 ScopedObjectAccess soa(env);
45 ScopedUtfChars filename(env, javaFilename);
46 if (filename.c_str() == NULL) {
47 return NULL;
48 }
49
50 if (javaLdLibraryPath != NULL) {
51 ScopedUtfChars ldLibraryPath(env, javaLdLibraryPath);
52 if (ldLibraryPath.c_str() == NULL) {
53 return NULL;
54 }
55 void* sym = dlsym(RTLD_DEFAULT, "android_update_LD_LIBRARY_PATH");
56 if (sym != NULL) {
57 typedef void (*Fn)(const char*);
58 Fn android_update_LD_LIBRARY_PATH = reinterpret_cast<Fn>(sym);
59 (*android_update_LD_LIBRARY_PATH)(ldLibraryPath.c_str());
60 } else {
61 LOG(ERROR) << "android_update_LD_LIBRARY_PATH not found; .so dependencies will not work!";
62 }
63 }
64
65 mirror::ClassLoader* classLoader = soa.Decode<mirror::ClassLoader*>(javaLoader);
66 std::string detail;
67 JavaVMExt* vm = Runtime::Current()->GetJavaVM();
68 bool success = vm->LoadNativeLibrary(filename.c_str(), classLoader, detail);
69 if (success) {
70 return NULL;
71 }
72
73 // Don't let a pending exception from JNI_OnLoad cause a CheckJNI issue with NewStringUTF.
74 env->ExceptionClear();
75 return env->NewStringUTF(detail.c_str());
76 }
77
Runtime_maxMemory(JNIEnv *,jclass)78 static jlong Runtime_maxMemory(JNIEnv*, jclass) {
79 return Runtime::Current()->GetHeap()->GetMaxMemory();
80 }
81
Runtime_totalMemory(JNIEnv *,jclass)82 static jlong Runtime_totalMemory(JNIEnv*, jclass) {
83 return Runtime::Current()->GetHeap()->GetTotalMemory();
84 }
85
Runtime_freeMemory(JNIEnv *,jclass)86 static jlong Runtime_freeMemory(JNIEnv*, jclass) {
87 return Runtime::Current()->GetHeap()->GetFreeMemory();
88 }
89
90 static JNINativeMethod gMethods[] = {
91 NATIVE_METHOD(Runtime, freeMemory, "()J"),
92 NATIVE_METHOD(Runtime, gc, "()V"),
93 NATIVE_METHOD(Runtime, maxMemory, "()J"),
94 NATIVE_METHOD(Runtime, nativeExit, "(I)V"),
95 NATIVE_METHOD(Runtime, nativeLoad, "(Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/String;"),
96 NATIVE_METHOD(Runtime, totalMemory, "()J"),
97 };
98
register_java_lang_Runtime(JNIEnv * env)99 void register_java_lang_Runtime(JNIEnv* env) {
100 REGISTER_NATIVE_METHODS("java/lang/Runtime");
101 }
102
103 } // namespace art
104