subprojects: Prepare for release

Expose Device.override_option() for overriding backend-specific
options on a device.

Overrides apply when establishing a host session. If one already
exists, changes take effect on the next connection.

examples/child_gating.py

@@ -44,11 +44,11 @@ class Application:
         print("✔ create_script()")
         script = session.create_script(
             """\
-Interceptor.attach(Module.getExportByName(null, 'open'), {
-  onEnter: function (args) {
+Interceptor.attach(Module.getGlobalExportByName('open'), {
+  onEnter(args) {
     send({
       type: 'open',
-      path: Memory.readUtf8String(args[0])
+      path: args[0].readUtf8String()
     });
   }
 });

examples/spawn_gating.py

@@ -0,0 +1,80 @@
+import threading
+
+from frida_tools.application import Reactor
+
+import frida
+
+
+class Application:
+    def __init__(self):
+        self._stop_requested = threading.Event()
+        self._reactor = Reactor(run_until_return=lambda reactor: self._stop_requested.wait())
+
+        self._device = frida.get_usb_device()
+        self._sessions = set()
+        self._sessions_lock = threading.Lock()
+
+        self._device.on("spawn-added", lambda spawn: self._reactor.schedule(lambda: self._on_spawn_added(spawn)))
+        self._device.on("spawn-removed", lambda spawn: self._reactor.schedule(lambda: self._on_spawn_removed(spawn)))
+
+    def run(self):
+        self._reactor.schedule(lambda: self._start())
+        self._reactor.run()
+
+    def _start(self):
+        self._device.enable_spawn_gating()
+
+    def _instrument(self, pid):
+        print(f"✔ attach(pid={pid})")
+        session = self._device.attach(pid)
+        session.on("detached", lambda reason: self._reactor.schedule(lambda: self._on_detached(pid, session, reason)))
+        print("✔ create_script()")
+        script = session.create_script(
+            """\
+const puts = new NativeFunction(Module.getGlobalExportByName('puts'), 'int', ['pointer']);
+puts(Memory.allocUtf8String('Hello from Frida agent'));
+Interceptor.attach(Module.getGlobalExportByName('open'), {
+  onEnter(args) {
+    send({
+      type: 'open',
+      path: args[0].readUtf8String()
+    });
+  }
+});
+"""
+        )
+        script.on("message", lambda message, data: self._reactor.schedule(lambda: self._on_message(pid, message)))
+        print("✔ load()")
+        script.load()
+        print(f"✔ resume(pid={pid})")
+        self._device.resume(pid)
+        with self._sessions_lock:
+            self._sessions.add(session)
+
+    def _on_spawn_added(self, spawn):
+        print(f"⚡ spawn_added: {spawn}")
+        t = threading.Thread(target=self._handle_spawn, args=(spawn,))
+        t.start()
+
+    def _handle_spawn(self, spawn):
+        if "/bin/ls" in spawn.identifier:
+            self._instrument(spawn.pid)
+        else:
+            pid = spawn.pid
+            print(f"✔ resume(pid={pid})")
+            self._device.resume(pid)
+
+    def _on_spawn_removed(self, spawn):
+        print(f"⚡ spawn_removed: {spawn}")
+
+    def _on_detached(self, pid, session, reason):
+        print(f"⚡ detached: pid={pid}, reason='{reason}'")
+        with self._sessions_lock:
+            self._sessions.remove(session)
+
+    def _on_message(self, pid, message):
+        print(f"⚡ message: pid={pid}, payload={message['payload']}")
+
+
+app = Application()
+app.run()

frida/_frida/extension.c

@@ -404,6 +404,7 @@ static void PyDevice_init_from_handle (PyDevice * self, FridaDevice * handle);
 static void PyDevice_dealloc (PyDevice * self);
 static PyObject * PyDevice_repr (PyDevice * self);
 static PyObject * PyDevice_is_lost (PyDevice * self);
+static PyObject * PyDevice_override_option (PyDevice * self, PyObject * args, PyObject * kw);
 static PyObject * PyDevice_query_system_parameters (PyDevice * self);
 static PyObject * PyDevice_get_frontmost_application (PyDevice * self, PyObject * args, PyObject * kw);
 static PyObject * PyDevice_enumerate_applications (PyDevice * self, PyObject * args, PyObject * kw);
@@ -620,6 +621,7 @@ static PyMethodDef PyDeviceManager_methods[] =
 static PyMethodDef PyDevice_methods[] =
 {
   { "is_lost", (PyCFunction) PyDevice_is_lost, METH_NOARGS, "Query whether the device has been lost." },
+  { "override_option", (PyCFunction) PyDevice_override_option, METH_VARARGS | METH_KEYWORDS, "Override a backend-specific option." },
   { "query_system_parameters", (PyCFunction) PyDevice_query_system_parameters, METH_NOARGS, "Returns a dictionary of information about the host system." },
   { "get_frontmost_application", (PyCFunction) PyDevice_get_frontmost_application, METH_VARARGS | METH_KEYWORDS, "Get details about the frontmost application." },
   { "enumerate_applications", (PyCFunction) PyDevice_enumerate_applications, METH_VARARGS | METH_KEYWORDS, "Enumerate applications." },
@@ -2521,6 +2523,33 @@ PyDevice_is_lost (PyDevice * self)
   return PyBool_FromLong (is_lost);
 }
 
+static PyObject *
+PyDevice_override_option (PyDevice * self, PyObject * args, PyObject * kw)
+{
+  static char * keywords[] = { "name", "value", NULL };
+  const char * name;
+  PyObject * value;
+  GVariant * raw_value;
+  GError * error = NULL;
+
+  if (!PyArg_ParseTupleAndKeywords (args, kw, "sO", keywords, &name, &value))
+    return NULL;
+
+  if (!PyGObject_unmarshal_variant (value, &raw_value))
+    return NULL;
+
+  Py_BEGIN_ALLOW_THREADS
+  frida_device_override_option (PY_GOBJECT_HANDLE (self), name, raw_value, &error);
+  Py_END_ALLOW_THREADS
+
+  g_variant_unref (raw_value);
+
+  if (error != NULL)
+    return PyFrida_raise (error);
+
+  PyFrida_RETURN_NONE;
+}
+
 static PyObject *
 PyDevice_query_system_parameters (PyDevice * self)
 {

frida/core.py

@@ -883,6 +883,14 @@ class Device:
 
         return self._impl.is_lost()
 
+    @cancellable
+    def override_option(self, name: str, value: Any) -> None:
+        """
+        Override a backend-specific option
+        """
+
+        self._impl.override_option(name, value)
+
     @cancellable
     def query_system_parameters(self) -> Dict[str, Any]:
         """

subprojects/frida-core.wrap

@@ -1,6 +1,6 @@
 [wrap-git]
 url = https://github.com/frida/frida-core.git
-revision = 17.8.1
+revision = 17.9.1
 depth = 1
 
 [provide]