1 /*
2 * Main entry of app process.
3 *
4 * Starts the interpreted runtime, then starts up the application.
5 *
6 */
7
8 #define LOG_TAG "appproc"
9
10 #include <binder/IPCThreadState.h>
11 #include <binder/ProcessState.h>
12 #include <utils/Log.h>
13 #include <cutils/process_name.h>
14 #include <cutils/memory.h>
15 #include <android_runtime/AndroidRuntime.h>
16
17 #include <stdio.h>
18 #include <unistd.h>
19
20 namespace android {
21
app_usage()22 void app_usage()
23 {
24 fprintf(stderr,
25 "Usage: app_process [java-options] cmd-dir start-class-name [options]\n");
26 }
27
app_init(const char * className,int argc,const char * const argv[])28 status_t app_init(const char* className, int argc, const char* const argv[])
29 {
30 LOGV("Entered app_init()!\n");
31
32 AndroidRuntime* jr = AndroidRuntime::getRuntime();
33 jr->callMain(className, argc, argv);
34
35 LOGV("Exiting app_init()!\n");
36 return NO_ERROR;
37 }
38
39 class AppRuntime : public AndroidRuntime
40 {
41 public:
AppRuntime()42 AppRuntime()
43 : mParentDir(NULL)
44 , mClassName(NULL)
45 , mArgC(0)
46 , mArgV(NULL)
47 {
48 }
49
50 #if 0
51 // this appears to be unused
52 const char* getParentDir() const
53 {
54 return mParentDir;
55 }
56 #endif
57
getClassName() const58 const char* getClassName() const
59 {
60 return mClassName;
61 }
62
onStarted()63 virtual void onStarted()
64 {
65 sp<ProcessState> proc = ProcessState::self();
66 if (proc->supportsProcesses()) {
67 LOGV("App process: starting thread pool.\n");
68 proc->startThreadPool();
69 }
70
71 app_init(mClassName, mArgC, mArgV);
72
73 if (ProcessState::self()->supportsProcesses()) {
74 IPCThreadState::self()->stopProcess();
75 }
76 }
77
onZygoteInit()78 virtual void onZygoteInit()
79 {
80 sp<ProcessState> proc = ProcessState::self();
81 if (proc->supportsProcesses()) {
82 LOGV("App process: starting thread pool.\n");
83 proc->startThreadPool();
84 }
85 }
86
onExit(int code)87 virtual void onExit(int code)
88 {
89 if (mClassName == NULL) {
90 // if zygote
91 if (ProcessState::self()->supportsProcesses()) {
92 IPCThreadState::self()->stopProcess();
93 }
94 }
95
96 AndroidRuntime::onExit(code);
97 }
98
99
100 const char* mParentDir;
101 const char* mClassName;
102 int mArgC;
103 const char* const* mArgV;
104 };
105
106 }
107
108 using namespace android;
109
110 /*
111 * sets argv0 to as much of newArgv0 as will fit
112 */
setArgv0(const char * argv0,const char * newArgv0)113 static void setArgv0(const char *argv0, const char *newArgv0)
114 {
115 strlcpy(const_cast<char *>(argv0), newArgv0, strlen(argv0));
116 }
117
main(int argc,const char * const argv[])118 int main(int argc, const char* const argv[])
119 {
120 // These are global variables in ProcessState.cpp
121 mArgC = argc;
122 mArgV = argv;
123
124 mArgLen = 0;
125 for (int i=0; i<argc; i++) {
126 mArgLen += strlen(argv[i]) + 1;
127 }
128 mArgLen--;
129
130 AppRuntime runtime;
131 const char *arg;
132 const char *argv0;
133
134 argv0 = argv[0];
135
136 // Process command line arguments
137 // ignore argv[0]
138 argc--;
139 argv++;
140
141 // Everything up to '--' or first non '-' arg goes to the vm
142
143 int i = runtime.addVmArguments(argc, argv);
144
145 // Next arg is parent directory
146 if (i < argc) {
147 runtime.mParentDir = argv[i++];
148 }
149
150 // Next arg is startup classname or "--zygote"
151 if (i < argc) {
152 arg = argv[i++];
153 if (0 == strcmp("--zygote", arg)) {
154 bool startSystemServer = (i < argc) ?
155 strcmp(argv[i], "--start-system-server") == 0 : false;
156 setArgv0(argv0, "zygote");
157 set_process_name("zygote");
158 runtime.start("com.android.internal.os.ZygoteInit",
159 startSystemServer);
160 } else {
161 set_process_name(argv0);
162
163 runtime.mClassName = arg;
164
165 // Remainder of args get passed to startup class main()
166 runtime.mArgC = argc-i;
167 runtime.mArgV = argv+i;
168
169 LOGV("App process is starting with pid=%d, class=%s.\n",
170 getpid(), runtime.getClassName());
171 runtime.start();
172 }
173 } else {
174 LOG_ALWAYS_FATAL("app_process: no class name or --zygote supplied.");
175 fprintf(stderr, "Error: no class name or --zygote supplied.\n");
176 app_usage();
177 return 10;
178 }
179
180 }
181