Janitorial format

BCC-Examples/sync_perf_output.py

@@ -68,8 +68,6 @@ def callback(cpu, event):
 
 perf = b["events"].open_perf_buffer(callback, struct_name="data_t")
 print("Starting to poll... (Ctrl+C to stop)")
-print("Try running: fork() or clone() system calls to trigger events")
-
 try:
     while True:
         b["events"].poll(1000)

pythonbpf/helper/helper_utils.py

@@ -287,7 +287,10 @@ def get_char_array_ptr_and_size(buf_arg, builder, local_sym_tab, struct_sym_tab)
 
         field_type = struct_info.field_type(field_name)
         if not _is_char_array(field_type):
-            raise ValueError("Expected char array field")
+            logger.info(
+                "Field is not a char array, falling back to int or ptr detection"
+            )
+            return None, 0
 
         struct_ptr = local_sym_tab[var_name].var
         field_ptr = struct_info.gep(builder, struct_ptr, field_name)

pythonbpf/helper/printk_formatter.py

@@ -220,11 +220,12 @@ def _prepare_expr_args(expr, func, module, builder, local_sym_tab, struct_sym_ta
     """Evaluate and prepare an expression to use as an arg for bpf_printk."""
 
     # Special case: struct field char array needs pointer to first element
-    char_array_ptr, _ = get_char_array_ptr_and_size(
-        expr, builder, local_sym_tab, struct_sym_tab
-    )
-    if char_array_ptr:
-        return char_array_ptr
+    if isinstance(expr, ast.Attribute):
+        char_array_ptr, _ = get_char_array_ptr_and_size(
+            expr, builder, local_sym_tab, struct_sym_tab
+        )
+        if char_array_ptr:
+            return char_array_ptr
 
     # Regular expression evaluation
     val, _ = eval_expr(func, module, builder, expr, local_sym_tab, None, struct_sym_tab)