[binutils-gdb] Some get_last_target_status tweaks
Pedro Alves
palves@sourceware.org
Fri Jan 10 20:09:00 GMT 2020
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=ab1ddbcf110a3f1ad45e3a346d2da98ffb833dec
commit ab1ddbcf110a3f1ad45e3a346d2da98ffb833dec
Author: Pedro Alves <palves@redhat.com>
Date: Fri Jan 10 20:05:49 2020 +0000
Some get_last_target_status tweaks
- Make get_last_target_status arguments optional. A following patch
will add another argument to get_last_target_status (the event's
target), and passing nullptr when we don't care for some piece of
info is handier than creating dummy local variables.
- Declare nullify_last_target_wait_ptid in a header, and remove the
local extern declaration from linux-fork.c.
gdb/ChangeLog:
2020-01-10 Pedro Alves <palves@redhat.com>
* break-catch-sig.c (signal_catchpoint_print_it): Don't pass a
ptid to get_last_target_status.
* break-catch-syscall.c (print_it_catch_syscall): Don't pass a
ptid to get_last_target_status.
* infcmd.c (continue_command): Don't pass a target_waitstatus to
get_last_target_status.
(info_program_command): Don't pass a target_waitstatus to
get_last_target_status.
* infrun.c (init_wait_for_inferior): Use
nullify_last_target_wait_ptid.
(get_last_target_status): Handle nullptr arguments.
(nullify_last_target_wait_ptid): Clear target_last_waitstatus.
(print_stop_event): Don't pass a ptid to get_last_target_status.
(normal_stop): Don't pass a ptid to get_last_target_status.
* infrun.h (get_last_target_status, set_last_target_status): Move
comments here and update.
(nullify_last_target_wait_ptid): Declare.
* linux-fork.c (fork_load_infrun_state): Remove local extern
declaration of nullify_last_target_wait_ptid.
* linux-nat.c (get_detach_signal): Don't pass a target_waitstatus
to get_last_target_status.
Diff:
---
gdb/ChangeLog | 24 ++++++++++++++++++++++++
gdb/break-catch-sig.c | 3 +--
gdb/break-catch-syscall.c | 3 +--
gdb/infcmd.c | 9 ++-------
gdb/infrun.c | 28 +++++++++++++---------------
gdb/infrun.h | 9 +++++++++
gdb/linux-fork.c | 1 -
gdb/linux-nat.c | 3 +--
8 files changed, 51 insertions(+), 29 deletions(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index a733f0d..2d18e3e 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,29 @@
2020-01-10 Pedro Alves <palves@redhat.com>
+ * break-catch-sig.c (signal_catchpoint_print_it): Don't pass a
+ ptid to get_last_target_status.
+ * break-catch-syscall.c (print_it_catch_syscall): Don't pass a
+ ptid to get_last_target_status.
+ * infcmd.c (continue_command): Don't pass a target_waitstatus to
+ get_last_target_status.
+ (info_program_command): Don't pass a target_waitstatus to
+ get_last_target_status.
+ * infrun.c (init_wait_for_inferior): Use
+ nullify_last_target_wait_ptid.
+ (get_last_target_status): Handle nullptr arguments.
+ (nullify_last_target_wait_ptid): Clear target_last_waitstatus.
+ (print_stop_event): Don't pass a ptid to get_last_target_status.
+ (normal_stop): Don't pass a ptid to get_last_target_status.
+ * infrun.h (get_last_target_status, set_last_target_status): Move
+ comments here and update.
+ (nullify_last_target_wait_ptid): Declare.
+ * linux-fork.c (fork_load_infrun_state): Remove local extern
+ declaration of nullify_last_target_wait_ptid.
+ * linux-nat.c (get_detach_signal): Don't pass a target_waitstatus
+ to get_last_target_status.
+
+2020-01-10 Pedro Alves <palves@redhat.com>
+
* gdbthread.h (scoped_restore_current_thread)
<dont_restore, restore, m_dont_restore>: Declare.
* thread.c (thread_alive): Add assertion. Return bool.
diff --git a/gdb/break-catch-sig.c b/gdb/break-catch-sig.c
index a9ec583..9970efa 100644
--- a/gdb/break-catch-sig.c
+++ b/gdb/break-catch-sig.c
@@ -181,12 +181,11 @@ static enum print_stop_action
signal_catchpoint_print_it (bpstat bs)
{
struct breakpoint *b = bs->breakpoint_at;
- ptid_t ptid;
struct target_waitstatus last;
const char *signal_name;
struct ui_out *uiout = current_uiout;
- get_last_target_status (&ptid, &last);
+ get_last_target_status (nullptr, &last);
signal_name = signal_to_name_or_int (last.value.sig);
diff --git a/gdb/break-catch-syscall.c b/gdb/break-catch-syscall.c
index 97eb100..e51777c 100644
--- a/gdb/break-catch-syscall.c
+++ b/gdb/break-catch-syscall.c
@@ -182,12 +182,11 @@ print_it_catch_syscall (bpstat bs)
syscall is. It can be in the TARGET_WAITKIND_SYSCALL_ENTRY
or TARGET_WAITKIND_SYSCALL_RETURN, and depending on it we
must print "called syscall" or "returned from syscall". */
- ptid_t ptid;
struct target_waitstatus last;
struct syscall s;
struct gdbarch *gdbarch = bs->bp_location_at->gdbarch;
- get_last_target_status (&ptid, &last);
+ get_last_target_status (nullptr, &last);
get_syscall_by_number (gdbarch, last.value.syscall_number, &s);
diff --git a/gdb/infcmd.c b/gdb/infcmd.c
index aea977f..99823a8 100644
--- a/gdb/infcmd.c
+++ b/gdb/infcmd.c
@@ -851,9 +851,8 @@ continue_command (const char *args, int from_tty)
else
{
ptid_t last_ptid;
- struct target_waitstatus ws;
- get_last_target_status (&last_ptid, &ws);
+ get_last_target_status (&last_ptid, nullptr);
tp = find_thread_ptid (last_ptid);
}
if (tp != NULL)
@@ -1993,11 +1992,7 @@ info_program_command (const char *args, int from_tty)
if (non_stop)
ptid = inferior_ptid;
else
- {
- struct target_waitstatus ws;
-
- get_last_target_status (&ptid, &ws);
- }
+ get_last_target_status (&ptid, nullptr);
if (ptid == null_ptid || ptid == minus_one_ptid)
error (_("No selected thread."));
diff --git a/gdb/infrun.c b/gdb/infrun.c
index 2fa5cd8..bcfb178 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -78,8 +78,6 @@ static void follow_inferior_reset_breakpoints (void);
static int currently_stepping (struct thread_info *tp);
-void nullify_last_target_wait_ptid (void);
-
static void insert_hp_step_resume_breakpoint_at_frame (struct frame_info *);
static void insert_step_resume_breakpoint_at_caller (struct frame_info *);
@@ -3103,7 +3101,7 @@ init_wait_for_inferior (void)
clear_proceed_status (0);
- target_last_wait_ptid = minus_one_ptid;
+ nullify_last_target_wait_ptid ();
previous_inferior_ptid = inferior_ptid;
}
@@ -3847,7 +3845,7 @@ init_thread_stepping_state (struct thread_info *tss)
tss->step_after_step_resume_breakpoint = 0;
}
-/* Set the cached copy of the last ptid/waitstatus. */
+/* See infrun.h. */
void
set_last_target_status (ptid_t ptid, struct target_waitstatus status)
@@ -3856,22 +3854,24 @@ set_last_target_status (ptid_t ptid, struct target_waitstatus status)
target_last_waitstatus = status;
}
-/* Return the cached copy of the last pid/waitstatus returned by
- target_wait()/deprecated_target_wait_hook(). The data is actually
- cached by handle_inferior_event(), which gets called immediately
- after target_wait()/deprecated_target_wait_hook(). */
+/* See infrun.h. */
void
-get_last_target_status (ptid_t *ptidp, struct target_waitstatus *status)
+get_last_target_status (ptid_t *ptid, struct target_waitstatus *status)
{
- *ptidp = target_last_wait_ptid;
- *status = target_last_waitstatus;
+ if (ptid != nullptr)
+ *ptid = target_last_wait_ptid;
+ if (status != nullptr)
+ *status = target_last_waitstatus;
}
+/* See infrun.h. */
+
void
nullify_last_target_wait_ptid (void)
{
target_last_wait_ptid = minus_one_ptid;
+ target_last_waitstatus = {};
}
/* Switch thread contexts. */
@@ -7876,10 +7876,9 @@ void
print_stop_event (struct ui_out *uiout, bool displays)
{
struct target_waitstatus last;
- ptid_t last_ptid;
struct thread_info *tp;
- get_last_target_status (&last_ptid, &last);
+ get_last_target_status (nullptr, &last);
{
scoped_restore save_uiout = make_scoped_restore (¤t_uiout, uiout);
@@ -7998,9 +7997,8 @@ int
normal_stop (void)
{
struct target_waitstatus last;
- ptid_t last_ptid;
- get_last_target_status (&last_ptid, &last);
+ get_last_target_status (nullptr, &last);
new_stop_id ();
diff --git a/gdb/infrun.h b/gdb/infrun.h
index 9125141..4dd995d 100644
--- a/gdb/infrun.h
+++ b/gdb/infrun.h
@@ -101,12 +101,21 @@ extern void wait_for_inferior (void);
target, false otherwise. */
extern int normal_stop (void);
+/* Return the cached copy of the last ptid/waitstatus returned
+ by target_wait()/deprecated_target_wait_hook(). The data is
+ actually cached by handle_inferior_event(), which gets called
+ immediately after target_wait()/deprecated_target_wait_hook(). */
extern void get_last_target_status (ptid_t *ptid,
struct target_waitstatus *status);
+/* Set the cached copy of the last ptid/waitstatus. */
extern void set_last_target_status (ptid_t ptid,
struct target_waitstatus status);
+/* Clear the cached copy of the last ptid/waitstatus returned by
+ target_wait(). */
+extern void nullify_last_target_wait_ptid ();
+
/* Stop all threads. Only returns after everything is halted. */
extern void stop_all_threads (void);
diff --git a/gdb/linux-fork.c b/gdb/linux-fork.c
index dd925ea..b15bd3b 100644
--- a/gdb/linux-fork.c
+++ b/gdb/linux-fork.c
@@ -215,7 +215,6 @@ call_lseek (int fd, off_t offset, int whence)
static void
fork_load_infrun_state (struct fork_info *fp)
{
- extern void nullify_last_target_wait_ptid ();
int i;
linux_nat_switch_fork (fp->ptid);
diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
index 4484fa5..a01839c 100644
--- a/gdb/linux-nat.c
+++ b/gdb/linux-nat.c
@@ -1315,10 +1315,9 @@ get_detach_signal (struct lwp_info *lp)
}
else if (!target_is_non_stop_p ())
{
- struct target_waitstatus last;
ptid_t last_ptid;
- get_last_target_status (&last_ptid, &last);
+ get_last_target_status (&last_ptid, nullptr);
if (lp->ptid.lwp () == last_ptid.lwp ())
signo = tp->suspend.stop_signal;
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