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| author | Simon Marchi <simon.marchi@polymtl.ca> | 2021-06-29 12:05:03 -0400 |
|---|---|---|
| committer | Simon Marchi <simon.marchi@polymtl.ca> | 2021-06-29 12:05:03 -0400 |
| commit | a154d838a70e96d888620c072e2d6ea8bdf044ca (patch) | |
| tree | e6e92b666415df522f365f6673357193c0e50f12 /gdb/alpha-tdep.c | |
| parent | a05a883fbaba69d0f80806e46a9457727fcbe74c (diff) | |
| download | fsf-binutils-gdb-a154d838a70e96d888620c072e2d6ea8bdf044ca.zip fsf-binutils-gdb-a154d838a70e96d888620c072e2d6ea8bdf044ca.tar.gz fsf-binutils-gdb-a154d838a70e96d888620c072e2d6ea8bdf044ca.tar.bz2 | |
gdb: add names to unwinders, add debug messages when looking for unwinder
I wrote this while debugging a problem where the expected unwinder for a
frame wasn't used. It adds messages to show which unwinders are
considered for a frame, why they are not selected (if an exception is
thrown), and finally which unwinder is selected in the end.
To be able to show a meaningful, human-readable name for the unwinders,
add a "name" field to struct frame_unwind, and update all instances to
include a name.
Here's an example of the output:
[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"
[frame] frame_unwind_try_unwinder: no
[frame] frame_unwind_try_unwinder: trying unwinder "amd64 epilogue"
[frame] frame_unwind_try_unwinder: no
[frame] frame_unwind_try_unwinder: trying unwinder "i386 epilogue"
[frame] frame_unwind_try_unwinder: no
[frame] frame_unwind_try_unwinder: trying unwinder "dwarf2"
[frame] frame_unwind_try_unwinder: yes
gdb/ChangeLog:
* frame-unwind.h (struct frame_unwind) <name>: New. Update
instances everywhere to include this field.
* frame-unwind.c (frame_unwind_try_unwinder,
frame_unwind_find_by_frame): Add debug messages.
Change-Id: I813f17777422425f0d08b22499817b23922e8ddb
Diffstat (limited to 'gdb/alpha-tdep.c')
| -rw-r--r-- | gdb/alpha-tdep.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/gdb/alpha-tdep.c b/gdb/alpha-tdep.c index 90ff813..7538c56 100644 --- a/gdb/alpha-tdep.c +++ b/gdb/alpha-tdep.c @@ -1012,7 +1012,9 @@ alpha_sigtramp_frame_sniffer (const struct frame_unwind *self, return 0; } -static const struct frame_unwind alpha_sigtramp_frame_unwind = { +static const struct frame_unwind alpha_sigtramp_frame_unwind = +{ + "alpha sigtramp", SIGTRAMP_FRAME, default_frame_unwind_stop_reason, alpha_sigtramp_frame_this_id, @@ -1429,7 +1431,9 @@ alpha_heuristic_frame_prev_register (struct frame_info *this_frame, return trad_frame_get_prev_register (this_frame, info->saved_regs, regnum); } -static const struct frame_unwind alpha_heuristic_frame_unwind = { +static const struct frame_unwind alpha_heuristic_frame_unwind = +{ + "alpha prologue", NORMAL_FRAME, default_frame_unwind_stop_reason, alpha_heuristic_frame_this_id, |