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
|
/*
* Main entry of app process.
*
* Starts the interpreted runtime, then starts up the application.
*
*/
#define LOG_TAG "appproc"
#include <binder/IPCThreadState.h>
#include <binder/ProcessState.h>
#include <utils/Log.h>
#include <cutils/process_name.h>
#include <cutils/memory.h>
#include <android_runtime/AndroidRuntime.h>
#include <stdio.h>
#include <unistd.h>
namespace android {
void app_usage()
{
fprintf(stderr,
"Usage: app_process [java-options] cmd-dir start-class-name [options]\n");
}
class AppRuntime : public AndroidRuntime
{
public:
AppRuntime()
: mParentDir(NULL)
, mClassName(NULL)
, mClass(NULL)
, mArgC(0)
, mArgV(NULL)
{
}
#if 0
// this appears to be unused
const char* getParentDir() const
{
return mParentDir;
}
#endif
const char* getClassName() const
{
return mClassName;
}
virtual void onVmCreated(JNIEnv* env)
{
if (mClassName == NULL) {
return; // Zygote. Nothing to do here.
}
/*
* This is a little awkward because the JNI FindClass call uses the
* class loader associated with the native method we're executing in.
* If called in onStarted (from RuntimeInit.finishInit because we're
* launching "am", for example), FindClass would see that we're calling
* from a boot class' native method, and so wouldn't look for the class
* we're trying to look up in CLASSPATH. Unfortunately it needs to,
* because the "am" classes are not boot classes.
*
* The easiest fix is to call FindClass here, early on before we start
* executing boot class Java code and thereby deny ourselves access to
* non-boot classes.
*/
char* slashClassName = toSlashClassName(mClassName);
mClass = env->FindClass(slashClassName);
if (mClass == NULL) {
ALOGE("ERROR: could not find class '%s'\n", mClassName);
}
free(slashClassName);
mClass = reinterpret_cast<jclass>(env->NewGlobalRef(mClass));
}
virtual void onStarted()
{
sp<ProcessState> proc = ProcessState::self();
ALOGV("App process: starting thread pool.\n");
proc->startThreadPool();
AndroidRuntime* ar = AndroidRuntime::getRuntime();
ar->callMain(mClassName, mClass, mArgC, mArgV);
IPCThreadState::self()->stopProcess();
}
virtual void onZygoteInit()
{
sp<ProcessState> proc = ProcessState::self();
ALOGV("App process: starting thread pool.\n");
proc->startThreadPool();
}
virtual void onExit(int code)
{
if (mClassName == NULL) {
// if zygote
IPCThreadState::self()->stopProcess();
}
AndroidRuntime::onExit(code);
}
const char* mParentDir;
const char* mClassName;
jclass mClass;
int mArgC;
const char* const* mArgV;
};
}
using namespace android;
/*
* sets argv0 to as much of newArgv0 as will fit
*/
static void setArgv0(const char *argv0, const char *newArgv0)
{
strlcpy(const_cast<char *>(argv0), newArgv0, strlen(argv0));
}
int main(int argc, const char* const argv[])
{
// These are global variables in ProcessState.cpp
mArgC = argc;
mArgV = argv;
mArgLen = 0;
for (int i=0; i<argc; i++) {
mArgLen += strlen(argv[i]) + 1;
}
mArgLen--;
AppRuntime runtime;
const char* argv0 = argv[0];
// Process command line arguments
// ignore argv[0]
argc--;
argv++;
// Everything up to '--' or first non '-' arg goes to the vm
int i = runtime.addVmArguments(argc, argv);
// Parse runtime arguments. Stop at first unrecognized option.
bool zygote = false;
bool startSystemServer = false;
bool application = false;
const char* parentDir = NULL;
const char* niceName = NULL;
const char* className = NULL;
while (i < argc) {
const char* arg = argv[i++];
if (!parentDir) {
parentDir = arg;
} else if (strcmp(arg, "--zygote") == 0) {
zygote = true;
niceName = "zygote";
} else if (strcmp(arg, "--start-system-server") == 0) {
startSystemServer = true;
} else if (strcmp(arg, "--application") == 0) {
application = true;
} else if (strncmp(arg, "--nice-name=", 12) == 0) {
niceName = arg + 12;
} else {
className = arg;
break;
}
}
if (niceName && *niceName) {
setArgv0(argv0, niceName);
set_process_name(niceName);
}
runtime.mParentDir = parentDir;
if (zygote) {
runtime.start("com.android.internal.os.ZygoteInit",
startSystemServer ? "start-system-server" : "");
} else if (className) {
// Remainder of args get passed to startup class main()
runtime.mClassName = className;
runtime.mArgC = argc - i;
runtime.mArgV = argv + i;
runtime.start("com.android.internal.os.RuntimeInit",
application ? "application" : "tool");
} else {
fprintf(stderr, "Error: no class name or --zygote supplied.\n");
app_usage();
LOG_ALWAYS_FATAL("app_process: no class name or --zygote supplied.");
return 10;
}
}
|
