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[gdb/symtab] Warn about unresolved DW_AT_upper_bound/DW_AT_count 

This patch generates a warning if DW_AT_upper_bound or DW_AT_count is defined,
but can't be translated.  This is triggered for current gcc in lto mode for
vla test-cases.

Build and reg-tested on x86_64-linux.

2018-07-26  Tom de Vries  <tdevries@suse.de>

	* dwarf2read.c (read_subrange_type): Warn if DW_AT_upper_bound or
	DW_AT_count can't be translated to a dynamic prop.
This commit is contained in:
Tom de Vries 2018-07-18 18:33:07 +02:00
parent 16f808ec99
commit 506f5c41ca
2 changed files with 22 additions and 2 deletions
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5
gdb/ChangeLog
View File

@ -1,3 +1,8 @@
2018-07-26 Tom de Vries <tdevries@suse.de>
* dwarf2read.c (read_subrange_type): Warn if DW_AT_upper_bound or
DW_AT_count can't be translated to a dynamic prop.
2018-07-25 Tom de Vries <tdevries@suse.de>
* dwarf2loc.c (dwarf2_locexpr_baton_eval): Wrap ctx.eval call in

19
gdb/dwarf2read.c
View File

@ -17626,10 +17626,11 @@ read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
sect_offset_str (die->sect_off),
objfile_name (cu->per_cu->dwarf2_per_objfile->objfile));
attr = dwarf2_attr (die, DW_AT_upper_bound, cu);
struct attribute *attr_ub, *attr_count;
attr = attr_ub = dwarf2_attr (die, DW_AT_upper_bound, cu);
if (!attr_to_dynamic_prop (attr, die, cu, &high))
{
attr = dwarf2_attr (die, DW_AT_count, cu);
attr = attr_count = dwarf2_attr (die, DW_AT_count, cu);
if (attr_to_dynamic_prop (attr, die, cu, &high))
{
/* If bounds are constant do the final calculation here. */
@ -17638,6 +17639,20 @@ read_subrange_type (struct die_info *die, struct dwarf2_cu *cu)
else
high_bound_is_count = 1;
}
else
{
if (attr_ub != NULL)
complaint (_("Unresolved DW_AT_upper_bound "
"- DIE at %s [in module %s]"),
sect_offset_str (die->sect_off),
objfile_name (cu->per_cu->dwarf2_per_objfile->objfile));
if (attr_count != NULL)
complaint (_("Unresolved DW_AT_count "
"- DIE at %s [in module %s]"),
sect_offset_str (die->sect_off),
objfile_name (cu->per_cu->dwarf2_per_objfile->objfile));
}
}
/* Dwarf-2 specifications explicitly allows to create subrange types