Tom Tromey 692252c4b0 Handle dynamic DW_AT_data_bit_offset ...

In Ada, a field can have a dynamic bit offset in its enclosing record.

In DWARF 3, this was handled using a dynamic
DW_AT_data_member_location, combined with a DW_AT_bit_offset -- this
combination worked out ok because in practice GNAT only needs a
dynamic byte offset with a fixed offset within the byte.

However, this approach was deprecated in DWARF 4 and then removed in
DWARF 5.  No replacement approach was given, meaning that in strict
mode there is no way to express this.

This is a DWARF bug, see

    https://dwarfstd.org/issues/250501.1.html

In a discussion on the DWARF mailing list, a couple people mentioned
that compilers could use the obvious extension of a dynamic
DW_AT_data_bit_offset.  I've implemented this for LLVM:

    https://github.com/llvm/llvm-project/pull/141106

In preparation for that landing, this patch implements support for
this construct in gdb.

New in v2: renamed some constants and added a helper method, per
Simon's review.

New in v3: more renamings.

Approved-By: Simon Marchi <simon.marchi@efficios.com>

2025-06-03 07:17:53 -06:00

..

lib/gdb

Fix DAP defer_stop_events implementation

2025-06-02 11:46:53 -06:00

py-all-events.def

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py-arch.c

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py-auto-load.c

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py-block.c

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py-bpevent.c

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py-breakpoint.c

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py-cmd.c

gdb/python/guile: check for invalid prefixes in Command/Parameter creation

2025-05-13 14:22:22 +01:00

py-color.c

gdb/python/guile: check if styling is disabled in Color.escape_sequence

2025-05-06 11:24:28 +01:00

py-color.h

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py-connection.c

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py-continueevent.c

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py-dap.c

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py-disasm.c

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py-event-types.def

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py-event.c

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py-event.h

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py-events.h

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py-evtregistry.c

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py-evts.c

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py-exitedevent.c

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py-finishbreakpoint.c

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py-frame.c

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py-framefilter.c

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py-function.c

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py-gdb-readline.c

Require Python 3.4

2025-05-30 07:09:53 -06:00

py-inferior.c

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py-infevents.c

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py-infthread.c

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py-instruction.c

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py-instruction.h

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py-lazy-string.c

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py-linetable.c

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py-membuf.c

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py-mi.c

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py-micmd.c

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py-newobjfileevent.c

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py-objfile.c

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py-param.c

gdb/python: allow empty gdb.Parameter.__doc__ string

2025-05-13 14:33:20 +01:00

py-prettyprint.c

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py-progspace.c

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py-record-btrace.c

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py-record-btrace.h

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py-record-full.c

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py-record-full.h

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py-record.c

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py-record.h

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py-ref.h

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py-registers.c

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py-signalevent.c

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py-stopevent.c

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py-stopevent.h

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py-symbol.c

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py-symtab.c

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py-threadevent.c

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py-tui.c

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py-type.c

Handle dynamic DW_AT_data_bit_offset

2025-06-03 07:17:53 -06:00

py-uiout.h

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py-unwind.c

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py-utils.c

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py-value.c

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py-varobj.c

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py-xmethods.c

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python-config.py

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python-internal.h

Require Python 3.4

2025-05-30 07:09:53 -06:00

python.c

gdb: rename ldirname to gdb_ldirname

2025-05-15 10:20:53 +02:00

python.h

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