/**
* Tries to open socket to Zygote process if not already open. If already open, does nothing. May
* block and retry.
*/
private static ZygoteState openZygoteSocketIfNeeded(String abi) throws ZygoteStartFailedEx {
if (primaryZygoteState == null || primaryZygoteState.isClosed()) {
primaryZygoteState = ZygoteState.connect(ZYGOTE_SOCKET, getNumTries(primaryZygoteState));
}
if (primaryZygoteState.matches(abi)) {
return primaryZygoteState;
}
// TODO: Get rid of this. This is a temporary workaround until all the
// compilation related pieces for the dual zygote stack are ready.
// b/3647418.
if (System.getenv("ANDROID_SOCKET_" + SECONDARY_ZYGOTE_SOCKET) == null) {
Log.e(LOG_TAG, "Forcing app to primary zygote, secondary unavailable (ABI= " + abi + ")");
// Should be :
// throw new ZygoteStartFailedEx("Unsupported zygote ABI: " + abi);
return primaryZygoteState;
}
// The primary zygote didn't match. Try the secondary.
if (secondaryZygoteState == null || secondaryZygoteState.isClosed()) {
secondaryZygoteState =
ZygoteState.connect(SECONDARY_ZYGOTE_SOCKET, getNumTries(secondaryZygoteState));
}
if (secondaryZygoteState.matches(abi)) {
return secondaryZygoteState;
}
throw new ZygoteStartFailedEx("Unsupported zygote ABI: " + abi);
}
/**
* Sends an argument list to the zygote process, which starts a new child and returns the child's
* pid. Please note: the present implementation replaces newlines in the argument list with
* spaces.
*
* @throws ZygoteStartFailedEx if process start failed for any reason
*/
private static ProcessStartResult zygoteSendArgsAndGetResult(
ZygoteState zygoteState, ArrayList<String> args) throws ZygoteStartFailedEx {
try {
/**
* See com.android.internal.os.ZygoteInit.readArgumentList() Presently the wire format to the
* zygote process is: a) a count of arguments (argc, in essence) b) a number of
* newline-separated argument strings equal to count
*
* <p>After the zygote process reads these it will write the pid of the child or -1 on
* failure, followed by boolean to indicate whether a wrapper process was used.
*/
final BufferedWriter writer = zygoteState.writer;
final DataInputStream inputStream = zygoteState.inputStream;
writer.write(Integer.toString(args.size()));
writer.newLine();
int sz = args.size();
for (int i = 0; i < sz; i++) {
String arg = args.get(i);
if (arg.indexOf('\n') >= 0) {
throw new ZygoteStartFailedEx("embedded newlines not allowed");
}
writer.write(arg);
writer.newLine();
}
writer.flush();
// Should there be a timeout on this?
ProcessStartResult result = new ProcessStartResult();
result.pid = inputStream.readInt();
if (result.pid < 0) {
throw new ZygoteStartFailedEx("fork() failed");
}
result.usingWrapper = inputStream.readBoolean();
return result;
} catch (IOException ex) {
zygoteState.close();
throw new ZygoteStartFailedEx(ex);
}
}
/**
* Tries to open socket to Zygote process if not already open. If already open, does nothing. May
* block and retry.
*/
private static ZygoteState openZygoteSocketIfNeeded(String abi) throws ZygoteStartFailedEx {
if (primaryZygoteState == null || primaryZygoteState.isClosed()) {
primaryZygoteState = ZygoteState.connect(ZYGOTE_SOCKET, getNumTries(primaryZygoteState));
}
if (primaryZygoteState.matches(abi)) {
return primaryZygoteState;
}
// The primary zygote didn't match. Try the secondary.
if (secondaryZygoteState == null || secondaryZygoteState.isClosed()) {
secondaryZygoteState =
ZygoteState.connect(SECONDARY_ZYGOTE_SOCKET, getNumTries(secondaryZygoteState));
}
if (secondaryZygoteState.matches(abi)) {
return secondaryZygoteState;
}
throw new ZygoteStartFailedEx("Unsupported zygote ABI: " + abi);
}
