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Elliott Hughesbf86d042011-08-31 17:53:14 -07001/*
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
Elliott Hughesc8fece32013-01-02 11:27:23 -080017#include <dlfcn.h>
Elliott Hughesbf86d042011-08-31 17:53:14 -070018#include <limits.h>
Elliott Hugheseac76672012-05-24 21:56:51 -070019#include <unistd.h>
Elliott Hughesbf86d042011-08-31 17:53:14 -070020
Ian Rogers1d54e732013-05-02 21:10:01 -070021#include "gc/heap.h"
Elliott Hughesbf86d042011-08-31 17:53:14 -070022#include "jni_internal.h"
Ian Rogers2dd0e2c2013-01-24 12:42:14 -080023#include "mirror/class_loader.h"
Elliott Hughesbf86d042011-08-31 17:53:14 -070024#include "runtime.h"
Ian Rogers00f7d0e2012-07-19 15:28:27 -070025#include "scoped_thread_state_change.h"
Elliott Hughesbf86d042011-08-31 17:53:14 -070026#include "ScopedUtfChars.h"
Mathieu Chartierc645f1d2014-03-06 18:11:53 -080027#include "sirt_ref-inl.h"
Elliott Hughesbf86d042011-08-31 17:53:14 -070028
29namespace art {
30
Ian Rogers00f7d0e2012-07-19 15:28:27 -070031static void Runtime_gc(JNIEnv*, jclass) {
Anwar Ghuloum87183592013-08-14 12:12:19 -070032 if (Runtime::Current()->IsExplicitGcDisabled()) {
33 LOG(INFO) << "Explicit GC skipped.";
34 return;
35 }
Elliott Hughesb3bd5f02012-03-08 21:05:27 -080036 Runtime::Current()->GetHeap()->CollectGarbage(false);
Elliott Hughesbf86d042011-08-31 17:53:14 -070037}
38
Elliott Hughes28c7bfd2012-06-01 12:45:40 -070039static void Runtime_nativeExit(JNIEnv*, jclass, jint status) {
40 Runtime::Current()->CallExitHook(status);
Elliott Hughesbf86d042011-08-31 17:53:14 -070041 exit(status);
42}
43
Elliott Hughesc8fece32013-01-02 11:27:23 -080044static jstring Runtime_nativeLoad(JNIEnv* env, jclass, jstring javaFilename, jobject javaLoader, jstring javaLdLibraryPath) {
Elliott Hughesbf86d042011-08-31 17:53:14 -070045 ScopedUtfChars filename(env, javaFilename);
46 if (filename.c_str() == NULL) {
47 return NULL;
48 }
49
Elliott Hughesc8fece32013-01-02 11:27:23 -080050 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
Elliott Hughesbf86d042011-08-31 17:53:14 -070065 std::string detail;
Ian Rogers1eb512d2013-10-18 15:42:20 -070066 {
67 ScopedObjectAccess soa(env);
Mathieu Chartier055d46c2014-02-06 11:22:17 -080068 SirtRef<mirror::ClassLoader> classLoader(soa.Self(),
69 soa.Decode<mirror::ClassLoader*>(javaLoader));
Ian Rogers1eb512d2013-10-18 15:42:20 -070070 JavaVMExt* vm = Runtime::Current()->GetJavaVM();
71 bool success = vm->LoadNativeLibrary(filename.c_str(), classLoader, &detail);
72 if (success) {
73 return nullptr;
74 }
Elliott Hughesbf86d042011-08-31 17:53:14 -070075 }
76
Brian Carlstrom75fe90c2013-06-26 22:26:16 -070077 // Don't let a pending exception from JNI_OnLoad cause a CheckJNI issue with NewStringUTF.
78 env->ExceptionClear();
Elliott Hughesbf86d042011-08-31 17:53:14 -070079 return env->NewStringUTF(detail.c_str());
80}
81
Elliott Hughes1bac54f2012-03-16 12:48:31 -070082static jlong Runtime_maxMemory(JNIEnv*, jclass) {
Elliott Hughesb3bd5f02012-03-08 21:05:27 -080083 return Runtime::Current()->GetHeap()->GetMaxMemory();
Elliott Hughesbf86d042011-08-31 17:53:14 -070084}
85
Elliott Hughes1bac54f2012-03-16 12:48:31 -070086static jlong Runtime_totalMemory(JNIEnv*, jclass) {
Elliott Hughesb3bd5f02012-03-08 21:05:27 -080087 return Runtime::Current()->GetHeap()->GetTotalMemory();
Elliott Hughesbf86d042011-08-31 17:53:14 -070088}
89
Elliott Hughes1bac54f2012-03-16 12:48:31 -070090static jlong Runtime_freeMemory(JNIEnv*, jclass) {
Elliott Hughesb3bd5f02012-03-08 21:05:27 -080091 return Runtime::Current()->GetHeap()->GetFreeMemory();
Elliott Hughesbf86d042011-08-31 17:53:14 -070092}
93
94static JNINativeMethod gMethods[] = {
Elliott Hugheseac76672012-05-24 21:56:51 -070095 NATIVE_METHOD(Runtime, freeMemory, "()J"),
96 NATIVE_METHOD(Runtime, gc, "()V"),
97 NATIVE_METHOD(Runtime, maxMemory, "()J"),
Elliott Hughes28c7bfd2012-06-01 12:45:40 -070098 NATIVE_METHOD(Runtime, nativeExit, "(I)V"),
Elliott Hughesc8fece32013-01-02 11:27:23 -080099 NATIVE_METHOD(Runtime, nativeLoad, "(Ljava/lang/String;Ljava/lang/ClassLoader;Ljava/lang/String;)Ljava/lang/String;"),
Elliott Hugheseac76672012-05-24 21:56:51 -0700100 NATIVE_METHOD(Runtime, totalMemory, "()J"),
Elliott Hughesbf86d042011-08-31 17:53:14 -0700101};
102
Elliott Hughesbf86d042011-08-31 17:53:14 -0700103void register_java_lang_Runtime(JNIEnv* env) {
Elliott Hugheseac76672012-05-24 21:56:51 -0700104 REGISTER_NATIVE_METHODS("java/lang/Runtime");
Elliott Hughesbf86d042011-08-31 17:53:14 -0700105}
106
107} // namespace art