interceptor: Add with_lock_held() and is_locked()

gum/guminterceptor.c

@@ -1,6 +1,7 @@
 /*
  * Copyright (C) 2008-2022 Ole André Vadla Ravnås <[email protected]>
  * Copyright (C) 2008 Christian Berentsen <[email protected]>
+ * Copyright (C) 2024 Francesco Tamagni <[email protected]>
  *
  * Licence: wxWindows Library Licence, Version 3.1
  */
@@ -809,6 +810,26 @@ gum_interceptor_restore (GumInvocationState * state)
   g_array_set_size (stack, old_depth);
 }
 
+void
+gum_interceptor_with_lock_held (GumInterceptor * self,
+                                GumInterceptorLockedFunc func,
+                                gpointer user_data)
+{
+  GUM_INTERCEPTOR_LOCK (self);
+  func (user_data);
+  GUM_INTERCEPTOR_UNLOCK (self);
+}
+
+gboolean
+gum_interceptor_is_locked (GumInterceptor * self)
+{
+  if (!g_rec_mutex_trylock (&self->mutex))
+    return TRUE;
+
+  GUM_INTERCEPTOR_UNLOCK (self);
+  return FALSE;
+}
+
 gpointer
 _gum_interceptor_peek_top_caller_return_address (void)
 {

gum/guminterceptor.h

@@ -1,6 +1,7 @@
 /*
  * Copyright (C) 2008-2022 Ole André Vadla Ravnås <[email protected]>
  * Copyright (C) 2008 Christian Berentsen <[email protected]>
+ * Copyright (C) 2024 Francesco Tamagni <[email protected]>
  *
  * Licence: wxWindows Library Licence, Version 3.1
  */
@@ -19,6 +20,7 @@ GUM_DECLARE_FINAL_TYPE (GumInterceptor, gum_interceptor, GUM, INTERCEPTOR,
 
 typedef GArray GumInvocationStack;
 typedef guint GumInvocationState;
+typedef void (* GumInterceptorLockedFunc) (gpointer user_data);
 
 typedef enum
 {
@@ -76,6 +78,10 @@ GUM_API gpointer gum_invocation_stack_translate (GumInvocationStack * self,
 GUM_API void gum_interceptor_save (GumInvocationState * state);
 GUM_API void gum_interceptor_restore (GumInvocationState * state);
 
+GUM_API void gum_interceptor_with_lock_held (GumInterceptor * self,
+    GumInterceptorLockedFunc func, gpointer user_data);
+GUM_API gboolean gum_interceptor_is_locked (GumInterceptor * self);
+
 G_END_DECLS
 
 #endif

vapi/frida-gum-1.0.vapi

@@ -154,6 +154,11 @@ namespace Gum {
 
 		public void ignore_other_threads ();
 		public void unignore_other_threads ();
+
+		public void with_lock_held (Gum.Interceptor.LockedFunc func);
+		public bool is_locked ();
+
+		public delegate void LockedFunc ();
 	}
 
 	[CCode (type_cname = "GumInvocationListenerInterface")]