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
|
/*
* 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.
*/
/*
* java.lang.Runtime
*/
#include "Dalvik.h"
#include "native/InternalNativePriv.h"
/*
* public void gc()
*
* Initiate a gc.
*/
static void Dalvik_java_lang_Runtime_gc(const u4* args, JValue* pResult)
{
UNUSED_PARAMETER(args);
dvmCollectGarbage(false);
RETURN_VOID();
}
/*
* private static void nativeExit(int code, boolean isExit)
*
* Runtime.exit() calls this after doing shutdown processing. Runtime.halt()
* uses this as well.
*/
static void Dalvik_java_lang_Runtime_nativeExit(const u4* args,
JValue* pResult)
{
int status = args[0];
bool isExit = (args[1] != 0);
if (isExit && gDvm.exitHook != NULL) {
dvmChangeStatus(NULL, THREAD_NATIVE);
(*gDvm.exitHook)(status); // not expected to return
dvmChangeStatus(NULL, THREAD_RUNNING);
LOGW("JNI exit hook returned\n");
}
LOGD("Calling exit(%d)\n", status);
exit(status);
}
/*
* static boolean nativeLoad(String filename, ClassLoader loader)
*
* Load the specified full path as a dynamic library filled with
* JNI-compatible methods.
*/
static void Dalvik_java_lang_Runtime_nativeLoad(const u4* args,
JValue* pResult)
{
StringObject* fileNameObj = (StringObject*) args[0];
Object* classLoader = (Object*) args[1];
char* fileName;
int result;
if (fileNameObj == NULL)
RETURN_INT(false);
fileName = dvmCreateCstrFromString(fileNameObj);
result = dvmLoadNativeCode(fileName, classLoader);
free(fileName);
RETURN_INT(result);
}
/*
* public void runFinalization(boolean forced)
*
* Requests that the VM runs finalizers for objects on the heap. If the
* parameter forced is true, then the VM needs to ensure finalization.
* Otherwise this only inspires the VM to make a best-effort attempt to
* run finalizers before returning, but it's not guaranteed to actually
* do anything.
*/
static void Dalvik_java_lang_Runtime_runFinalization(const u4* args,
JValue* pResult)
{
bool forced = (args[0] != 0);
dvmWaitForHeapWorkerIdle();
if (forced) {
// TODO(Google) Need to explicitly implement this,
// although dvmWaitForHeapWorkerIdle()
// should usually provide the "forced"
// behavior already.
}
RETURN_VOID();
}
/*
* public void maxMemory()
*
* Returns GC heap max memory in bytes.
*/
static void Dalvik_java_lang_Runtime_maxMemory(const u4* args, JValue* pResult)
{
unsigned int result = gDvm.heapSizeMax;
RETURN_LONG(result);
}
/*
* public void totalMemory()
*
* Returns GC heap total memory in bytes.
*/
static void Dalvik_java_lang_Runtime_totalMemory(const u4* args,
JValue* pResult)
{
int result = dvmGetHeapDebugInfo(kVirtualHeapSize);
RETURN_LONG(result);
}
/*
* public void freeMemory()
*
* Returns GC heap free memory in bytes.
*/
static void Dalvik_java_lang_Runtime_freeMemory(const u4* args,
JValue* pResult)
{
int result = dvmGetHeapDebugInfo(kVirtualHeapSize)
- dvmGetHeapDebugInfo(kVirtualHeapAllocated);
if (result < 0) {
result = 0;
}
RETURN_LONG(result);
}
const DalvikNativeMethod dvm_java_lang_Runtime[] = {
{ "freeMemory", "()J",
Dalvik_java_lang_Runtime_freeMemory },
{ "gc", "()V",
Dalvik_java_lang_Runtime_gc },
{ "maxMemory", "()J",
Dalvik_java_lang_Runtime_maxMemory },
{ "nativeExit", "(IZ)V",
Dalvik_java_lang_Runtime_nativeExit },
{ "nativeLoad", "(Ljava/lang/String;Ljava/lang/ClassLoader;)Z",
Dalvik_java_lang_Runtime_nativeLoad },
{ "runFinalization", "(Z)V",
Dalvik_java_lang_Runtime_runFinalization },
{ "totalMemory", "()J",
Dalvik_java_lang_Runtime_totalMemory },
{ NULL, NULL, NULL },
};
|
