--- binutils.orig/bfd/dwarf2.c 2019-11-13 11:49:52.211121564 +0000
+++ binutils-2.33.1/bfd/dwarf2.c 2019-11-13 11:53:26.991423055 +0000
@@ -2813,8 +2813,8 @@ static bfd_boolean comp_unit_maybe_decod
static bfd_boolean
find_abstract_instance (struct comp_unit * unit,
- bfd_byte * orig_info_ptr,
struct attribute * attr_ptr,
+ unsigned int recur_count,
const char ** pname,
bfd_boolean * is_linkage,
char ** filename_ptr,
@@ -2829,6 +2829,14 @@ find_abstract_instance (struct comp_unit
struct attribute attr;
const char *name = NULL;
+ if (recur_count == 100)
+ {
+ _bfd_error_handler
+ (_("DWARF error: abstract instance recursion detected"));
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
/* DW_FORM_ref_addr can reference an entry in a different CU. It
is an offset from the .debug_info section, not the current CU. */
if (attr_ptr->form == DW_FORM_ref_addr)
@@ -2962,15 +2970,7 @@ find_abstract_instance (struct comp_unit
info_ptr, info_ptr_end);
if (info_ptr == NULL)
break;
- /* It doesn't ever make sense for DW_AT_specification to
- refer to the same DIE. Stop simple recursion. */
- if (info_ptr == orig_info_ptr)
- {
- _bfd_error_handler
- (_("DWARF error: abstract instance recursion detected"));
- bfd_set_error (bfd_error_bad_value);
- return FALSE;
- }
+
switch (attr.name)
{
case DW_AT_name:
@@ -2984,7 +2984,7 @@ find_abstract_instance (struct comp_unit
}
break;
case DW_AT_specification:
- if (!find_abstract_instance (unit, info_ptr, &attr,
+ if (!find_abstract_instance (unit, &attr, recur_count + 1,
&name, is_linkage,
filename_ptr, linenumber_ptr))
return FALSE;
@@ -3200,7 +3200,7 @@ scan_unit_for_symbols (struct comp_unit
case DW_AT_abstract_origin:
case DW_AT_specification:
- if (!find_abstract_instance (unit, info_ptr, &attr,
+ if (!find_abstract_instance (unit, &attr, 0,
&func->name,
&func->is_linkage,
&func->file,