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Andrew Burgess d0c1dcb58e gdb/python: fix FinishBreakpoint.return_value for tail call functions 
The FinishBreakpoint.return_value attribute will not be populated
correctly for tail call functions.

In bpfinishpy_init (python/py-finishbreakpoint.c) we use the function
get_frame_pc_if_available to return an address, and then use this
address to lookup a function symbol.

The problem is that, for tail call functions, the address returned by
get_frame_pc_if_available can be outside the bounds of the function,
as a result GDB might find no function symbol at all, or might find
the wrong function symbol, if the tail call function is immediately
adjacent to the next function.

Fix this by using get_frame_address_in_block_if_available instead.
For tail call functions this will return an address within the bounds
of the function, which means that GDB should find the correct function
symbol, and from this the correct return type.

I've extended the existing FinishBreakpoint with tail call test case
to include printing the return value, this test fails without this
patch, but now works.

Approved-By: Tom Tromey <tom@tromey.com>
2026-03-05 17:45:27 +00:00
..
lib/gdb Update black to 26.1.0 2026-01-23 06:45:46 -07:00
py-all-events.def gdb/python: new selected_context event 2026-03-05 09:42:18 +00:00
py-arch.c Return gdbpy_ref<> from gdbarch_to_arch_object 2026-02-23 05:29:12 -07:00
py-auto-load.c Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-block.c Return gdbpy_ref<> from block_to_block_object 2026-02-23 05:29:11 -07:00
py-bpevent.c Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-breakpoint.c gdb: cast all Python extension objects passed to gdbpy_ref_policy to PyObject* 2026-01-29 16:46:14 +00:00
py-cmd.c gdb: cast all Python extension objects passed to gdbpy_ref_policy to PyObject* 2026-01-29 16:46:14 +00:00
py-color.c Use ref_ptr upcasts in Python code 2026-03-04 10:09:33 -07:00
py-color.h Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-connection.c Use ref_ptr upcasts in Python code 2026-03-04 10:09:33 -07:00
py-continueevent.c Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-corefile.c gdb: cast all Python extension objects passed to gdbpy_ref_policy to PyObject* 2026-01-29 16:46:14 +00:00
py-dap.c Rewrite output redirection and logging 2026-02-09 08:15:44 -07:00
py-disasm.c Use the "O!" format more in the Python code 2026-02-27 12:01:56 -07:00
py-event-types.def gdb/python: new selected_context event 2026-03-05 09:42:18 +00:00
py-event.c Use ref_ptr upcasts in Python code 2026-03-04 10:09:33 -07:00
py-event.h gdb: new setters and getters for __dict__, and attributes 2026-01-29 16:46:14 +00:00
py-events.h gdb: cast all Python extension objects passed to gdbpy_ref_policy to PyObject* 2026-01-29 16:46:14 +00:00
py-evtregistry.c Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-evts.c Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-exitedevent.c Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-finishbreakpoint.c gdb/python: fix FinishBreakpoint.return_value for tail call functions 2026-03-05 17:45:27 +00:00
py-frame.c Use ref_ptr upcasts in Python code 2026-03-04 10:09:33 -07:00
py-framefilter.c Return gdbpy_ref<> from frame_info_to_frame_object 2026-02-23 05:29:12 -07:00
py-function.c gdb: switch tuple object helpers to Python limited API equivalents 2026-03-04 15:38:11 +00:00
py-gdb-readline.c Python limited API: migrate Py_CompileStringExFlags and PyRun_SimpleString 2026-01-28 09:41:25 +00:00
py-inferior.c gdb/python: new selected_context event 2026-03-05 09:42:18 +00:00
py-infevents.c Return gdbpy_ref<> from frame_info_to_frame_object 2026-02-23 05:29:12 -07:00
py-infthread.c gdb: switch tuple object helpers to Python limited API equivalents 2026-03-04 15:38:11 +00:00
py-instruction.c gdb: make remaining Python extension objects inherit from PyObject 2026-01-29 16:46:14 +00:00
py-instruction.h Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-lazy-string.c Return gdbpy_ref<> from type_to_type_object 2026-02-23 05:29:12 -07:00
py-linetable.c Return gdbpy_ref<> from symtab_to_linetable_object 2026-02-23 05:29:12 -07:00
py-membuf.c gdb: cast all Python extension objects passed to gdbpy_ref_policy to PyObject* 2026-01-29 16:46:14 +00:00
py-mi.c gdb: switch sequence protocol helpers to Python limited API equivalents 2026-02-27 11:38:57 +00:00
py-micmd.c gdb: cast all Python extension objects passed to gdbpy_ref_policy to PyObject* 2026-01-29 16:46:14 +00:00
py-newobjfileevent.c Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-objfile.c gdb/python: remove some unreachable Py_RETURN_NONE 2026-02-23 08:21:46 -05:00
py-param.c gdb: make remaining Python extension objects inherit from PyObject 2026-01-29 16:46:14 +00:00
py-prettyprint.c gdb: switch bytes object helpers to Python limited API equivalents 2026-03-04 15:38:28 +00:00
py-progspace.c Return gdbpy_ref<> from block_to_block_object 2026-02-23 05:29:11 -07:00
py-record-btrace.c Use the "O!" format more in the Python code 2026-02-27 12:01:56 -07:00
py-record-btrace.h Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-record-full.c Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-record-full.h Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-record.c gdb: make remaining Python extension objects inherit from PyObject 2026-01-29 16:46:14 +00:00
py-record.h gdb: make remaining Python extension objects inherit from PyObject 2026-01-29 16:46:14 +00:00
py-ref.h Don't use template for gdbpy_ref_policy 2026-03-04 10:07:33 -07:00
py-registers.c Use ref_ptr upcasts in Python code 2026-03-04 10:09:33 -07:00
py-signalevent.c Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-stopevent.c Return gdbpy_ref<> from value_to_value_object 2026-02-23 05:29:11 -07:00
py-stopevent.h Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-style.c gdb: make remaining Python extension objects inherit from PyObject 2026-01-29 16:46:14 +00:00
py-symbol.c gdb: switch tuple object helpers to Python limited API equivalents 2026-03-04 15:38:11 +00:00
py-symtab.c gdb/python: introduce gdb.Symtab.source_lines method 2026-03-05 10:17:08 +00:00
py-threadevent.c Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-tui.c gdb: cast all Python extension objects passed to gdbpy_ref_policy to PyObject* 2026-01-29 16:46:14 +00:00
py-type.c gdb: switch tuple object helpers to Python limited API equivalents 2026-03-04 15:38:11 +00:00
py-uiout.h Remove m_applied_style from ui_file 2026-02-09 08:15:29 -07:00
py-unwind.c gdb: switch tuple object helpers to Python limited API equivalents 2026-03-04 15:38:11 +00:00
py-utils.c gdb/python: introduce gdb.Symtab.source_lines method 2026-03-05 10:17:08 +00:00
py-value.c Return gdbpy_ref<> from type_to_type_object 2026-02-23 05:29:12 -07:00
py-varobj.c Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00
py-xmethods.c gdb: switch tuple object helpers to Python limited API equivalents 2026-03-04 15:38:11 +00:00
python-config.py Run isort 2024-04-02 11:21:39 -06:00
python-internal.h gdb/python: introduce gdb.Symtab.source_lines method 2026-03-05 10:17:08 +00:00
python.c gdb: switch tuple object helpers to Python limited API equivalents 2026-03-04 15:38:11 +00:00
python.h Update copyright dates to include 2026 2026-01-05 13:16:46 -07:00