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| author | Simon Marchi <simon.marchi@polymtl.ca> | 2021-06-29 12:05:14 -0400 |
|---|---|---|
| committer | Simon Marchi <simon.marchi@polymtl.ca> | 2021-06-29 12:05:14 -0400 |
| commit | fe67a58f98232db44e620cd2bb450fca47635104 (patch) | |
| tree | 9d6772585c9bba60dcda35b110ff360c763b119e /gdb/breakpoint.h | |
| parent | a154d838a70e96d888620c072e2d6ea8bdf044ca (diff) | |
| download | binutils-gdb-fe67a58f98232db44e620cd2bb450fca47635104.tar.gz | |
gdb: introduce FRAME_SCOPED_DEBUG_ENTER_EXIT
Introduce FRAME_SCOPED_DEBUG_ENTER_EXIT and use it to print enter/exit
messages in important frame-related functions. I think this helps
understand which lower-level operations are done as part of which
higher-level operation. And it helps visually skip over a higher-level
operation you are not interested in.
Here's an example, combined with some py-unwind messages:
[frame] frame_unwind_find_by_frame: enter
[frame] frame_unwind_find_by_frame: this_frame=0
[frame] frame_unwind_try_unwinder: trying unwinder "dummy"
[frame] frame_unwind_try_unwinder: no
[frame] frame_unwind_try_unwinder: trying unwinder "dwarf2 tailcall"
[frame] frame_unwind_try_unwinder: no
[frame] frame_unwind_try_unwinder: trying unwinder "inline"
[frame] frame_unwind_try_unwinder: no
[frame] frame_unwind_try_unwinder: trying unwinder "jit"
[frame] frame_unwind_try_unwinder: no
[frame] frame_unwind_try_unwinder: trying unwinder "python"
[py-unwind] pyuw_sniffer: enter
[frame] frame_unwind_register_value: enter
[frame] frame_unwind_register_value: frame=-1, regnum=7(rsp)
[frame] frame_unwind_register_value: -> register=7 bytes=[40ddffffff7f0000]
[frame] frame_unwind_register_value: exit
[py-unwind] pyuw_sniffer: frame=0, sp=0x7fffffffdd40, pc=0x5555555551ec
[frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_unwind_register_value: enter
[frame] frame_unwind_register_value: frame=-1, regnum=6(rbp)
[frame] frame_unwind_register_value: -> register=6 bytes=[50ddffffff7f0000]
[frame] frame_unwind_register_value: exit
[frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] get_prev_frame: enter
[frame] get_prev_frame_always_1: enter
[frame] get_prev_frame_always_1: this_frame=-1
[frame] get_prev_frame_always_1: -> {level=0,type=NORMAL_FRAME,unwind=0x5588ee3d17c0,pc=0x5555555551ec,id=<not computed>,func=<unknown>} // cached
[frame] get_prev_frame_always_1: exit
[frame] get_prev_frame: exit
[frame] value_fetch_lazy_register: (frame=0, regnum=6(rbp), ...) -> register=6 bytes=[50ddffffff7f0000]
[frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_unwind_register_value: enter
[frame] frame_unwind_register_value: frame=-1, regnum=7(rsp)
[frame] frame_unwind_register_value: -> register=7 bytes=[40ddffffff7f0000]
[frame] frame_unwind_register_value: exit
[frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] get_prev_frame: enter
[frame] get_prev_frame_always_1: enter
[frame] get_prev_frame_always_1: this_frame=-1
[frame] get_prev_frame_always_1: -> {level=0,type=NORMAL_FRAME,unwind=0x5588ee3d1824,pc=0x5555555551ec,id=<not computed>,func=<unknown>} // cached
[frame] get_prev_frame_always_1: exit
[frame] get_prev_frame: exit
[frame] value_fetch_lazy_register: (frame=0, regnum=7(rsp), ...) -> register=7 bytes=[40ddffffff7f0000]
[frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_unwind_register_value: enter
[frame] frame_unwind_register_value: frame=-1, regnum=16(rip)
[frame] frame_unwind_register_value: -> register=16 bytes=[ec51555555550000]
[frame] frame_unwind_register_value: exit
[frame] frame_id_p: l={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] frame_id_eq: l={stack=<sentinel>,!code,special=0x0000000000000000}, r={stack=<sentinel>,!code,special=0x0000000000000000} -> 1
[frame] get_prev_frame: enter
[frame] get_prev_frame_always_1: enter
[frame] get_prev_frame_always_1: this_frame=-1
[frame] get_prev_frame_always_1: -> {level=0,type=NORMAL_FRAME,unwind=0x5588ee3d1888,pc=0x5555555551ec,id=<not computed>,func=<unknown>} // cached
[frame] get_prev_frame_always_1: exit
[frame] get_prev_frame: exit
[frame] value_fetch_lazy_register: (frame=0, regnum=16(rip), ...) -> register=16 bytes=[ec51555555550000]
[py-unwind] pyuw_sniffer: frame claimed by unwinder test unwinder
[py-unwind] pyuw_sniffer: exit
[frame] frame_unwind_try_unwinder: yes
[frame] frame_unwind_find_by_frame: exit
gdb/ChangeLog:
* frame.h (FRAME_SCOPED_DEBUG_ENTER_EXIT): New.
* frame.c (compute_frame_id, get_prev_frame_always_1,
get_prev_frame): Use FRAME_SCOPED_DEBUG_ENTER_EXIT.
* frame-unwind.c (frame_unwind_find_by_frame): Likewise.
(frame_unwind_register_value): Likewise.
Change-Id: I45b69b4ed962e70572bc55b8adfb211483c1eeed
Diffstat (limited to 'gdb/breakpoint.h')
0 files changed, 0 insertions, 0 deletions