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authorSimon Marchi <simon.marchi@polymtl.ca>2021-06-29 12:05:03 -0400
committerSimon Marchi <simon.marchi@polymtl.ca>2021-06-29 12:05:03 -0400
commita154d838a70e96d888620c072e2d6ea8bdf044ca (patch)
treee6e92b666415df522f365f6673357193c0e50f12 /gdb/riscv-tdep.c
parenta05a883fbaba69d0f80806e46a9457727fcbe74c (diff)
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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/riscv-tdep.c')
-rw-r--r--gdb/riscv-tdep.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/gdb/riscv-tdep.c b/gdb/riscv-tdep.c
index d942b05..19e2616 100644
--- a/gdb/riscv-tdep.c
+++ b/gdb/riscv-tdep.c
@@ -3320,6 +3320,7 @@ riscv_frame_prev_register (struct frame_info *this_frame,
static const struct frame_unwind riscv_frame_unwind =
{
+ /*.name =*/ "riscv prologue",
/*.type =*/ NORMAL_FRAME,
/*.stop_reason =*/ default_frame_unwind_stop_reason,
/*.this_id =*/ riscv_frame_this_id,