Throw an exception on a failed new in frida ASan, instead of just returning null (#512)

libafl_frida/src/asan/hook_funcs.rs

@@ -54,7 +54,19 @@ impl AsanRuntime {
     #[allow(non_snake_case)]
     #[inline]
     pub fn hook__Znwm(&mut self, size: usize) -> *mut c_void {
-        unsafe { self.allocator_mut().alloc(size, 8) }
+        let result = unsafe { self.allocator_mut().alloc(size, 8) };
+        if result.is_null() {
+            extern "C" {
+                fn _ZSt17__throw_bad_allocv();
+            }
+
+            unsafe {
+                _ZSt17__throw_bad_allocv();
+            }
+            0xabcdef as *mut c_void
+        } else {
+            result
+        }
     }
 
     #[allow(non_snake_case)]
@@ -70,7 +82,17 @@ impl AsanRuntime {
     #[allow(non_snake_case)]
     #[inline]
     pub fn hook__ZnwmSt11align_val_t(&mut self, size: usize, alignment: usize) -> *mut c_void {
-        unsafe { self.allocator_mut().alloc(size, alignment) }
+        let result = unsafe { self.allocator_mut().alloc(size, alignment) };
+        if result.is_null() {
+            extern "C" {
+                fn _ZSt17__throw_bad_allocv();
+            }
+
+            unsafe {
+                _ZSt17__throw_bad_allocv();
+            }
+        }
+        result
     }
 
     #[allow(non_snake_case)]