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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org> To: gdb-prs@sourceware.org Subject: [Bug symtab/25470] Assertion hit in maybe_negate_by_bytes Date: Wed, 23 Sep 2020 15:51:02 +0000 [thread overview] Message-ID: <bug-25470-4717-fzSKNz7wb1@http.sourceware.org/bugzilla/> (raw) In-Reply-To: <bug-25470-4717@http.sourceware.org/bugzilla/> https://sourceware.org/bugzilla/show_bug.cgi?id=25470 --- Comment #12 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Tom Tromey <tromey@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=20a5fcbd5b28cca88511ac5a9ad5e54251e8fa6d commit 20a5fcbd5b28cca88511ac5a9ad5e54251e8fa6d Author: Tom Tromey <tom@tromey.com> Date: Wed Sep 23 09:39:24 2020 -0600 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. -- You are receiving this mail because: You are on the CC list for the bug.
next prev parent reply other threads:[~2020-09-23 15:51 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <bug-25470-4717@http.sourceware.org/bugzilla/> 2020-08-09 21:11 ` [Bug varobj/25470] " tromey at sourceware dot org 2020-08-14 7:22 ` tromey at sourceware dot org 2020-08-17 1:54 ` [Bug symtab/25470] " tromey at sourceware dot org 2020-08-17 2:11 ` tromey at sourceware dot org 2020-09-23 15:51 ` cvs-commit at gcc dot gnu.org [this message] 2020-09-23 15:52 ` tromey at sourceware dot org 2020-10-08 17:54 ` tromey at sourceware dot org
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