Tom Tromey 20a5fcbd5b 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.		2020-09-23 09:39:24 -06:00
..
abbrev.c
abbrev.h
attribute.c
attribute.h
comp-unit.c
comp-unit.h
die.h
dwz.c
dwz.h
expr.c
expr.h
frame-tailcall.c
frame-tailcall.h
frame.c
frame.h
index-cache.c
index-cache.h
index-common.c
index-common.h
index-write.c
index-write.h
leb.c
leb.h
line-header.c
line-header.h
loc.c
loc.h
macro.c
macro.h
read.c	Handle bit offset and bit size in base types	2020-09-23 09:39:24 -06:00
read.h
section.c
section.h
stringify.c
stringify.h