* [PATCH, applied] fix comparing array subrange DIEs
@ 2023-01-01 17:34 Dodji Seketeli
0 siblings, 0 replies; only message in thread
From: Dodji Seketeli @ 2023-01-01 17:34 UTC (permalink / raw)
To: libabigail
Hello,
When looking at something else in the DWARF reader, I noticed that the
DIE comparison algorithm for DW_TAG_subprogram DIEs was not taking
into account non-set DW_AT_upper_bound attributes.
Fixed thus.
* src/abg-dwarf-reader.cc (compare_dies): For DW_TAG_subprogram,
non-set DW_AT_{lower,upper}_bound is not the same as when they are
set to zero.
Signed-off-by: Dodji Seketeli <dodji@redhat.com>
---
src/abg-dwarf-reader.cc | 21 ++++++++++++++++++---
1 file changed, 18 insertions(+), 3 deletions(-)
diff --git a/src/abg-dwarf-reader.cc b/src/abg-dwarf-reader.cc
index d2848a30..e3a1348d 100644
--- a/src/abg-dwarf-reader.cc
+++ b/src/abg-dwarf-reader.cc
@@ -10933,8 +10933,14 @@ compare_dies(const reader& rdr,
{
uint64_t l_lower_bound = 0, r_lower_bound = 0,
l_upper_bound = 0, r_upper_bound = 0;
- die_unsigned_constant_attribute(l, DW_AT_lower_bound, l_lower_bound);
- die_unsigned_constant_attribute(r, DW_AT_lower_bound, r_lower_bound);
+ bool l_lower_bound_set = false, r_lower_bound_set = false,
+ l_upper_bound_set = false, r_upper_bound_set = false;
+
+ l_lower_bound_set =
+ die_unsigned_constant_attribute(l, DW_AT_lower_bound, l_lower_bound);
+ r_lower_bound_set =
+ die_unsigned_constant_attribute(r, DW_AT_lower_bound, r_lower_bound);
+
if (!die_unsigned_constant_attribute(l, DW_AT_upper_bound,
l_upper_bound))
{
@@ -10942,10 +10948,14 @@ compare_dies(const reader& rdr,
if (die_unsigned_constant_attribute(l, DW_AT_count, l_count))
{
l_upper_bound = l_lower_bound + l_count;
+ l_upper_bound_set = true;
if (l_upper_bound)
--l_upper_bound;
}
}
+ else
+ l_upper_bound_set = true;
+
if (!die_unsigned_constant_attribute(r, DW_AT_upper_bound,
r_upper_bound))
{
@@ -10953,12 +10963,17 @@ compare_dies(const reader& rdr,
if (die_unsigned_constant_attribute(l, DW_AT_count, r_count))
{
r_upper_bound = r_lower_bound + r_count;
+ r_upper_bound_set = true;
if (r_upper_bound)
--r_upper_bound;
}
}
+ else
+ r_upper_bound_set = true;
- if ((l_lower_bound != r_lower_bound)
+ if ((l_lower_bound_set != r_lower_bound_set)
+ || (l_upper_bound_set != r_upper_bound_set)
+ || (l_lower_bound != r_lower_bound)
|| (l_upper_bound != r_upper_bound))
SET_RESULT_TO_FALSE(result, l, r);
}
--
2.39.0
--
Dodji
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