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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/i386-tdep.c | |
| parent | a05a883fbaba69d0f80806e46a9457727fcbe74c (diff) | |
| download | gdb-a154d838a70e96d888620c072e2d6ea8bdf044ca.zip gdb-a154d838a70e96d888620c072e2d6ea8bdf044ca.tar.gz 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/i386-tdep.c')
| -rw-r--r-- | gdb/i386-tdep.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c index 973085e..e436437 100644 --- a/gdb/i386-tdep.c +++ b/gdb/i386-tdep.c @@ -2196,6 +2196,7 @@ i386_frame_prev_register (struct frame_info *this_frame, void **this_cache, static const struct frame_unwind i386_frame_unwind = { + "i386 prologue", NORMAL_FRAME, i386_frame_unwind_stop_reason, i386_frame_this_id, @@ -2317,6 +2318,7 @@ i386_epilogue_frame_prev_register (struct frame_info *this_frame, static const struct frame_unwind i386_epilogue_frame_unwind = { + "i386 epilogue", NORMAL_FRAME, i386_epilogue_frame_unwind_stop_reason, i386_epilogue_frame_this_id, @@ -2398,6 +2400,7 @@ i386_stack_tramp_frame_sniffer (const struct frame_unwind *self, static const struct frame_unwind i386_stack_tramp_frame_unwind = { + "i386 stack tramp", NORMAL_FRAME, i386_epilogue_frame_unwind_stop_reason, i386_epilogue_frame_this_id, @@ -2545,6 +2548,7 @@ i386_sigtramp_frame_sniffer (const struct frame_unwind *self, static const struct frame_unwind i386_sigtramp_frame_unwind = { + "i386 sigtramp", SIGTRAMP_FRAME, i386_sigtramp_frame_unwind_stop_reason, i386_sigtramp_frame_this_id, |