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| author | Tom Tromey <tom@tromey.com> | 2020-09-23 09:39:24 -0600 |
|---|---|---|
| committer | Tom Tromey <tom@tromey.com> | 2020-09-23 09:39:24 -0600 |
| commit | 20a5fcbd5b28cca88511ac5a9ad5e54251e8fa6d (patch) | |
| tree | 5443c2824f7d53f50d8d280f64d19f398f523f65 /gdb/ChangeLog | |
| parent | bac51ab78d4bee5273c7d6306ff6d41545fd5628 (diff) | |
| download | gdb-20a5fcbd5b28cca88511ac5a9ad5e54251e8fa6d.zip gdb-20a5fcbd5b28cca88511ac5a9ad5e54251e8fa6d.tar.gz gdb-20a5fcbd5b28cca88511ac5a9ad5e54251e8fa6d.tar.bz2 | |
Handle bit offset and bit size in base types
PR symtab/25470 points out that the Zig programming language allows
integers of various bit sizes (including zero), not just sizes that
are a multiple of 8.
This is supported in DWARF by applying both a byte size and a
DW_AT_bit_size.
This patch adds support for this feature to integer and boolean types.
Other base types are not handled -- for floating-point types, this
didn't seem to make sense, and for character types I didn't see much
need. (These can be added later if desired.)
I've also added support for DW_AT_data_bit_offset at the same time. I
don't know whether the Zig compiler requires this, but it was
described in the same section in the DWARF standard and was easy to
add.
A new test case is supplied, using the DWARF assembler.
gdb/ChangeLog
2020-09-23 Tom Tromey <tom@tromey.com>
PR symtab/25470:
* value.c (unpack_long, pack_long, pack_unsigned_long): Handle bit
offset and bit size.
* printcmd.c (print_scalar_formatted): Handle zero-length
integer.
(print_scalar_formatted): Use bit_size_differs_p.
* gdbtypes.h (enum type_specific_kind) <TYPE_SPECIFIC_INT>: New
constant.
(union type_specific): <int_stuff>: New member.
(struct type) <bit_size_differs_p, bit_size, bit_offset>: New
methods.
* gdbtypes.c (init_integer_type, init_boolean_type): Initialize
TYPE_SPECIFIC_FIELD.
(recursive_dump_type, copy_type_recursive): Update.
* dwarf2/read.c (read_base_type): Handle DW_AT_bit_size and
DW_AT_data_bit_offset.
gdb/testsuite/ChangeLog
2020-09-23 Tom Tromey <tom@tromey.com>
* gdb.dwarf2/intbits.exp: New file.
* gdb.dwarf2/intbits.c: New file.
Diffstat (limited to 'gdb/ChangeLog')
| -rw-r--r-- | gdb/ChangeLog | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 7b9b7d4..241f3e7 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,24 @@ 2020-09-23 Tom Tromey <tom@tromey.com> + PR symtab/25470: + * value.c (unpack_long, pack_long, pack_unsigned_long): Handle bit + offset and bit size. + * printcmd.c (print_scalar_formatted): Handle zero-length + integer. + (print_scalar_formatted): Use bit_size_differs_p. + * gdbtypes.h (enum type_specific_kind) <TYPE_SPECIFIC_INT>: New + constant. + (union type_specific): <int_stuff>: New member. + (struct type) <bit_size_differs_p, bit_size, bit_offset>: New + methods. + * gdbtypes.c (init_integer_type, init_boolean_type): Initialize + TYPE_SPECIFIC_FIELD. + (recursive_dump_type, copy_type_recursive): Update. + * dwarf2/read.c (read_base_type): Handle DW_AT_bit_size and + DW_AT_data_bit_offset. + +2020-09-23 Tom Tromey <tom@tromey.com> + * utils.h (class gdb_argv): Add move operators. <append>: New methods. * compile/compile.c (build_argc_argv): Remove. |