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--- binutils.orig/bfd/dwarf2.c 2019-12-03 15:50:43.324118062 +0000
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+++ binutils-2.30/bfd/dwarf2.c 2019-12-03 15:54:32.545489215 +0000
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@@ -2803,8 +2803,8 @@ lookup_symbol_in_variable_table (struct
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static bfd_boolean
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find_abstract_instance_name (struct comp_unit *unit,
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- bfd_byte *orig_info_ptr,
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struct attribute *attr_ptr,
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+ unsigned int recur_count,
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const char **pname,
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bfd_boolean *is_linkage)
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{
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@@ -2817,6 +2817,14 @@ find_abstract_instance_name (struct comp
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struct attribute attr;
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const char *name = NULL;
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+ if (recur_count == 100)
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+ {
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+ _bfd_error_handler
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+ (_("DWARF error: abstract instance recursion detected"));
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+ bfd_set_error (bfd_error_bad_value);
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+ return FALSE;
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+ }
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+
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/* DW_FORM_ref_addr can reference an entry in a different CU. It
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is an offset from the .debug_info section, not the current CU. */
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if (attr_ptr->form == DW_FORM_ref_addr)
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@@ -2934,15 +2942,7 @@ find_abstract_instance_name (struct comp
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info_ptr, info_ptr_end);
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if (info_ptr == NULL)
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break;
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- /* It doesn't ever make sense for DW_AT_specification to
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- refer to the same DIE. Stop simple recursion. */
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- if (info_ptr == orig_info_ptr)
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- {
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- _bfd_error_handler
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- (_("Dwarf Error: Abstract instance recursion detected."));
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- bfd_set_error (bfd_error_bad_value);
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- return FALSE;
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- }
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+
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switch (attr.name)
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{
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case DW_AT_name:
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@@ -2956,7 +2956,7 @@ find_abstract_instance_name (struct comp
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}
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break;
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case DW_AT_specification:
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- if (!find_abstract_instance_name (unit, info_ptr, &attr,
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+ if (!find_abstract_instance_name (unit, &attr, recur_count + 1,
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pname, is_linkage))
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return FALSE;
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break;
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@@ -3162,7 +3162,7 @@ scan_unit_for_symbols (struct comp_unit
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case DW_AT_abstract_origin:
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case DW_AT_specification:
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- if (!find_abstract_instance_name (unit, info_ptr, &attr,
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+ if (!find_abstract_instance_name (unit, &attr, 0,
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&func->name,
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&func->is_linkage))
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goto fail;
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