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| author | Andreas Arnez <arnez@linux.vnet.ibm.com> | 2016-11-24 17:48:03 +0100 |
|---|---|---|
| committer | Andreas Arnez <arnez@linux.vnet.ibm.com> | 2016-11-24 17:48:03 +0100 |
| commit | da5b30da2d1167591aa8d71b543f97bfdc2ec2a2 (patch) | |
| tree | 02b8642e03532bfd81e14658ccf016b1e2dfa428 /gdb/dwarf2read.c | |
| parent | 1dcb9720d62cd053a72c31881b7724ce9f74332c (diff) | |
| download | gdb-da5b30da2d1167591aa8d71b543f97bfdc2ec2a2.zip gdb-da5b30da2d1167591aa8d71b543f97bfdc2ec2a2.tar.gz gdb-da5b30da2d1167591aa8d71b543f97bfdc2ec2a2.tar.bz2 | |
Fix PR12616 - gdb does not implement DW_AT_data_bit_offset
The DW_AT_data_bit_offset attribute was introduced by DWARF V4 and
allows specifying the offset of a data member within its containing
entity. But although the new attribute was intended to replace
DW_AT_bit_offset for this purpose, GDB ignores it, and thus GCC still
emits DW_AT_bit_offset instead. See also
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71669.
This change fixes GDB's lack of support for DW_AT_data_bit_offset and
adds an appropriate test case.
gdb/ChangeLog:
PR gdb/12616
* dwarf2read.c (dwarf2_add_field): Handle the DWARF V4 attribute
DW_AT_data_bit_offset.
gdb/testsuite/ChangeLog:
PR gdb/12616
* gdb.dwarf2/nonvar-access.exp: New testcase. Check that GDB
respects the DW_AT_data_bit_offset attribute.
Diffstat (limited to 'gdb/dwarf2read.c')
| -rw-r--r-- | gdb/dwarf2read.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c index 1ad6b00..558159a 100644 --- a/gdb/dwarf2read.c +++ b/gdb/dwarf2read.c @@ -12584,6 +12584,10 @@ dwarf2_add_field (struct field_info *fip, struct die_info *die, - bit_offset - FIELD_BITSIZE (*fp))); } } + attr = dwarf2_attr (die, DW_AT_data_bit_offset, cu); + if (attr != NULL) + SET_FIELD_BITPOS (*fp, (FIELD_BITPOS (*fp) + + dwarf2_get_attr_constant_value (attr, 0))); /* Get name of field. */ fieldname = dwarf2_name (die, cu); |