1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <limits.h>
#include "class_linker.h"
#include "common_throws.h"
#include "debugger.h"
#include "dex_file-inl.h"
#include "gc/allocator/dlmalloc.h"
#include "gc/space/dlmalloc_space.h"
#include "jni_internal.h"
#include "mirror/class-inl.h"
#include "mirror/object.h"
#include "mirror/object-inl.h"
#include "object_utils.h"
#include "scoped_thread_state_change.h"
#include "thread.h"
#include "thread_list.h"
#include "toStringArray.h"
namespace art {
static jfloat VMRuntime_getTargetHeapUtilization(JNIEnv*, jobject) {
return Runtime::Current()->GetHeap()->GetTargetHeapUtilization();
}
static void VMRuntime_nativeSetTargetHeapUtilization(JNIEnv*, jobject, jfloat target) {
Runtime::Current()->GetHeap()->SetTargetHeapUtilization(target);
}
static void VMRuntime_startJitCompilation(JNIEnv*, jobject) {
}
static void VMRuntime_disableJitCompilation(JNIEnv*, jobject) {
}
static jobject VMRuntime_newNonMovableArray(JNIEnv* env, jobject, jclass javaElementClass, jint length) {
ScopedObjectAccess soa(env);
#ifdef MOVING_GARBAGE_COLLECTOR
// TODO: right now, we don't have a copying collector, so there's no need
// to do anything special here, but we ought to pass the non-movability
// through to the allocator.
UNIMPLEMENTED(FATAL);
#endif
mirror::Class* element_class = soa.Decode<mirror::Class*>(javaElementClass);
if (element_class == NULL) {
ThrowNullPointerException(NULL, "element class == null");
return NULL;
}
if (length < 0) {
ThrowNegativeArraySizeException(length);
return NULL;
}
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
std::string descriptor;
descriptor += "[";
descriptor += ClassHelper(element_class).GetDescriptor();
mirror::Class* array_class = class_linker->FindClass(descriptor.c_str(), NULL);
mirror::Array* result = mirror::Array::Alloc(soa.Self(), array_class, length);
if (result == NULL) {
return NULL;
}
return soa.AddLocalReference<jobject>(result);
}
static jlong VMRuntime_addressOf(JNIEnv* env, jobject, jobject javaArray) {
if (javaArray == NULL) { // Most likely allocation failed
return 0;
}
ScopedObjectAccess soa(env);
mirror::Array* array = soa.Decode<mirror::Array*>(javaArray);
if (!array->IsArrayInstance()) {
ThrowIllegalArgumentException(NULL, "not an array");
return 0;
}
// TODO: we should also check that this is a non-movable array.
return reinterpret_cast<uintptr_t>(array->GetRawData(array->GetClass()->GetComponentSize()));
}
static void VMRuntime_clearGrowthLimit(JNIEnv*, jobject) {
Runtime::Current()->GetHeap()->ClearGrowthLimit();
}
static jboolean VMRuntime_isDebuggerActive(JNIEnv*, jobject) {
return Dbg::IsDebuggerActive();
}
static jobjectArray VMRuntime_properties(JNIEnv* env, jobject) {
return toStringArray(env, Runtime::Current()->GetProperties());
}
// This is for backward compatibility with dalvik which returned the
// meaningless "." when no boot classpath or classpath was
// specified. Unfortunately, some tests were using java.class.path to
// lookup relative file locations, so they are counting on this to be
// ".", presumably some applications or libraries could have as well.
static const char* DefaultToDot(const std::string& class_path) {
return class_path.empty() ? "." : class_path.c_str();
}
static jstring VMRuntime_bootClassPath(JNIEnv* env, jobject) {
return env->NewStringUTF(DefaultToDot(Runtime::Current()->GetBootClassPathString()));
}
static jstring VMRuntime_classPath(JNIEnv* env, jobject) {
return env->NewStringUTF(DefaultToDot(Runtime::Current()->GetClassPathString()));
}
static jstring VMRuntime_vmVersion(JNIEnv* env, jobject) {
return env->NewStringUTF(Runtime::Current()->GetVersion());
}
static jstring VMRuntime_vmLibrary(JNIEnv* env, jobject) {
return env->NewStringUTF(kIsDebugBuild ? "libartd.so" : "libart.so");
}
#if !defined(ART_USE_PORTABLE_COMPILER)
static void DisableCheckJniCallback(Thread* t, void*) {
t->GetJniEnv()->SetCheckJniEnabled(false);
}
#endif
static void VMRuntime_setTargetSdkVersion(JNIEnv* env, jobject, jint targetSdkVersion) {
// This is the target SDK version of the app we're about to run.
// Note that targetSdkVersion may be CUR_DEVELOPMENT (10000).
// Note that targetSdkVersion may be 0, meaning "current".
if (targetSdkVersion > 0 && targetSdkVersion <= 13 /* honeycomb-mr2 */) {
Runtime* runtime = Runtime::Current();
JavaVMExt* vm = runtime->GetJavaVM();
#if !defined(ART_USE_PORTABLE_COMPILER)
if (vm->check_jni) {
LOG(WARNING) << "Turning off CheckJNI so we can turn on JNI app bug workarounds...";
Thread* self = static_cast<JNIEnvExt*>(env)->self;
MutexLock mu(self, *Locks::thread_list_lock_);
vm->SetCheckJniEnabled(false);
runtime->GetThreadList()->ForEach(DisableCheckJniCallback, NULL);
}
LOG(INFO) << "Turning on JNI app bug workarounds for target SDK version "
<< targetSdkVersion << "...";
vm->work_around_app_jni_bugs = true;
#else
UNUSED(env);
LOG(WARNING) << "LLVM does not work-around app jni bugs.";
vm->work_around_app_jni_bugs = false;
#endif
}
}
static void VMRuntime_trimHeap(JNIEnv*, jobject) {
uint64_t start_ns = NanoTime();
// Trim the managed heap.
gc::Heap* heap = Runtime::Current()->GetHeap();
gc::space::DlMallocSpace* alloc_space = heap->GetAllocSpace();
size_t alloc_space_size = alloc_space->Size();
float managed_utilization =
static_cast<float>(alloc_space->GetBytesAllocated()) / alloc_space_size;
size_t managed_reclaimed = heap->Trim();
uint64_t gc_heap_end_ns = NanoTime();
// Trim the native heap.
dlmalloc_trim(0);
size_t native_reclaimed = 0;
dlmalloc_inspect_all(DlmallocMadviseCallback, &native_reclaimed);
uint64_t end_ns = NanoTime();
LOG(INFO) << "Heap trim of managed (duration=" << PrettyDuration(gc_heap_end_ns - start_ns)
<< ", advised=" << PrettySize(managed_reclaimed) << ") and native (duration="
<< PrettyDuration(end_ns - gc_heap_end_ns) << ", advised=" << PrettySize(native_reclaimed)
<< ") heaps. Managed heap utilization of " << static_cast<int>(100 * managed_utilization)
<< "%.";
}
static void VMRuntime_concurrentGC(JNIEnv* env, jobject) {
Thread* self = static_cast<JNIEnvExt*>(env)->self;
Runtime::Current()->GetHeap()->ConcurrentGC(self);
}
static JNINativeMethod gMethods[] = {
NATIVE_METHOD(VMRuntime, addressOf, "(Ljava/lang/Object;)J"),
NATIVE_METHOD(VMRuntime, bootClassPath, "()Ljava/lang/String;"),
NATIVE_METHOD(VMRuntime, classPath, "()Ljava/lang/String;"),
NATIVE_METHOD(VMRuntime, clearGrowthLimit, "()V"),
NATIVE_METHOD(VMRuntime, concurrentGC, "()V"),
NATIVE_METHOD(VMRuntime, disableJitCompilation, "()V"),
NATIVE_METHOD(VMRuntime, getTargetHeapUtilization, "()F"),
NATIVE_METHOD(VMRuntime, isDebuggerActive, "()Z"),
NATIVE_METHOD(VMRuntime, nativeSetTargetHeapUtilization, "(F)V"),
NATIVE_METHOD(VMRuntime, newNonMovableArray, "(Ljava/lang/Class;I)Ljava/lang/Object;"),
NATIVE_METHOD(VMRuntime, properties, "()[Ljava/lang/String;"),
NATIVE_METHOD(VMRuntime, setTargetSdkVersion, "(I)V"),
NATIVE_METHOD(VMRuntime, startJitCompilation, "()V"),
NATIVE_METHOD(VMRuntime, trimHeap, "()V"),
NATIVE_METHOD(VMRuntime, vmVersion, "()Ljava/lang/String;"),
NATIVE_METHOD(VMRuntime, vmLibrary, "()Ljava/lang/String;"),
};
void register_dalvik_system_VMRuntime(JNIEnv* env) {
REGISTER_NATIVE_METHODS("dalvik/system/VMRuntime");
}
} // namespace art
|
