From 272bb05cc59ccfbb15f9e496d4d2ec243e08473c Mon Sep 17 00:00:00 2001 From: John Baldwin Date: Tue, 21 Jul 2020 17:28:16 -0700 Subject: [PATCH] Add a new gdbarch hook to report additional signal information. This is a more general version of the existing handle_segmentation_fault hook that is able to report information for an arbitrary signal, not just SIGSEGV. gdb/ChangeLog: * gdbarch.c: Regenerate. * gdbarch.h: Regenerate. * gdbarch.sh (report_signal_info): New method. * infrun.c (print_signal_received_reason): Invoke gdbarch report_signal_info hook if present. --- gdb/ChangeLog | 8 ++++++++ gdb/gdbarch.c | 32 ++++++++++++++++++++++++++++++++ gdb/gdbarch.h | 10 ++++++++++ gdb/gdbarch.sh | 5 +++++ gdb/infrun.c | 5 +++++ 5 files changed, 60 insertions(+) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 31307e6ff2b..afdaa749f1e 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,11 @@ +2020-07-21 John Baldwin + + * gdbarch.c: Regenerate. + * gdbarch.h: Regenerate. + * gdbarch.sh (report_signal_info): New method. + * infrun.c (print_signal_received_reason): Invoke gdbarch + report_signal_info hook if present. + 2020-07-21 Andrew Burgess * python/py-registers.c : Add 'unordered_map' include. diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c index 21ee840e88f..d393e7a7345 100644 --- a/gdb/gdbarch.c +++ b/gdb/gdbarch.c @@ -192,6 +192,7 @@ struct gdbarch gdbarch_ax_pseudo_register_collect_ftype *ax_pseudo_register_collect; gdbarch_ax_pseudo_register_push_stack_ftype *ax_pseudo_register_push_stack; gdbarch_handle_segmentation_fault_ftype *handle_segmentation_fault; + gdbarch_report_signal_info_ftype *report_signal_info; int sp_regnum; int pc_regnum; int ps_regnum; @@ -556,6 +557,7 @@ verify_gdbarch (struct gdbarch *gdbarch) /* Skip verify of ax_pseudo_register_collect, has predicate. */ /* Skip verify of ax_pseudo_register_push_stack, has predicate. */ /* Skip verify of handle_segmentation_fault, has predicate. */ + /* Skip verify of report_signal_info, has predicate. */ /* Skip verify of sp_regnum, invalid_p == 0 */ /* Skip verify of pc_regnum, invalid_p == 0 */ /* Skip verify of ps_regnum, invalid_p == 0 */ @@ -1320,6 +1322,12 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file) fprintf_unfiltered (file, "gdbarch_dump: remote_register_number = <%s>\n", host_address_to_string (gdbarch->remote_register_number)); + fprintf_unfiltered (file, + "gdbarch_dump: gdbarch_report_signal_info_p() = %d\n", + gdbarch_report_signal_info_p (gdbarch)); + fprintf_unfiltered (file, + "gdbarch_dump: report_signal_info = <%s>\n", + host_address_to_string (gdbarch->report_signal_info)); fprintf_unfiltered (file, "gdbarch_dump: return_in_first_hidden_param_p = <%s>\n", host_address_to_string (gdbarch->return_in_first_hidden_param_p)); @@ -2113,6 +2121,30 @@ set_gdbarch_handle_segmentation_fault (struct gdbarch *gdbarch, gdbarch->handle_segmentation_fault = handle_segmentation_fault; } +int +gdbarch_report_signal_info_p (struct gdbarch *gdbarch) +{ + gdb_assert (gdbarch != NULL); + return gdbarch->report_signal_info != NULL; +} + +void +gdbarch_report_signal_info (struct gdbarch *gdbarch, struct ui_out *uiout, enum gdb_signal siggnal) +{ + gdb_assert (gdbarch != NULL); + gdb_assert (gdbarch->report_signal_info != NULL); + if (gdbarch_debug >= 2) + fprintf_unfiltered (gdb_stdlog, "gdbarch_report_signal_info called\n"); + gdbarch->report_signal_info (gdbarch, uiout, siggnal); +} + +void +set_gdbarch_report_signal_info (struct gdbarch *gdbarch, + gdbarch_report_signal_info_ftype report_signal_info) +{ + gdbarch->report_signal_info = report_signal_info; +} + int gdbarch_sp_regnum (struct gdbarch *gdbarch) { diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h index 0940156aeb8..9414407b04d 100644 --- a/gdb/gdbarch.h +++ b/gdb/gdbarch.h @@ -332,6 +332,16 @@ typedef void (gdbarch_handle_segmentation_fault_ftype) (struct gdbarch *gdbarch, extern void gdbarch_handle_segmentation_fault (struct gdbarch *gdbarch, struct ui_out *uiout); extern void set_gdbarch_handle_segmentation_fault (struct gdbarch *gdbarch, gdbarch_handle_segmentation_fault_ftype *handle_segmentation_fault); +/* Some architectures can display additional information for specific + signals. + UIOUT is the output stream where the handler will place information. */ + +extern int gdbarch_report_signal_info_p (struct gdbarch *gdbarch); + +typedef void (gdbarch_report_signal_info_ftype) (struct gdbarch *gdbarch, struct ui_out *uiout, enum gdb_signal siggnal); +extern void gdbarch_report_signal_info (struct gdbarch *gdbarch, struct ui_out *uiout, enum gdb_signal siggnal); +extern void set_gdbarch_report_signal_info (struct gdbarch *gdbarch, gdbarch_report_signal_info_ftype *report_signal_info); + /* GDB's standard (or well known) register numbers. These can map onto a real register or a pseudo (computed) register or not be defined at all (-1). diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh index 41e7b8d5cc3..1601879532f 100755 --- a/gdb/gdbarch.sh +++ b/gdb/gdbarch.sh @@ -420,6 +420,11 @@ M;int;ax_pseudo_register_push_stack;struct agent_expr *ax, int reg;ax, reg # UIOUT is the output stream where the handler will place information. M;void;handle_segmentation_fault;struct ui_out *uiout;uiout +# Some architectures can display additional information for specific +# signals. +# UIOUT is the output stream where the handler will place information. +M;void;report_signal_info;struct ui_out *uiout, enum gdb_signal siggnal;uiout, siggnal + # GDB's standard (or well known) register numbers. These can map onto # a real register or a pseudo (computed) register or not be defined at # all (-1). diff --git a/gdb/infrun.c b/gdb/infrun.c index 31266109a6d..e58b623954d 100644 --- a/gdb/infrun.c +++ b/gdb/infrun.c @@ -8299,6 +8299,11 @@ print_signal_received_reason (struct ui_out *uiout, enum gdb_signal siggnal) annotate_signal_string (); uiout->field_string ("signal-meaning", gdb_signal_to_string (siggnal)); + struct regcache *regcache = get_current_regcache (); + struct gdbarch *gdbarch = regcache->arch (); + if (gdbarch_report_signal_info_p (gdbarch)) + gdbarch_report_signal_info (gdbarch, uiout, siggnal); + if (siggnal == GDB_SIGNAL_SEGV) handle_segmentation_fault (uiout); -- 2.30.2