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Move OpenBSD-only functions from inf-ptrace to obsd-nat

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All major BSDs implement PT_GET_PROCESS_STATE, but they differ in
details and want to implement follow-fork functionality differently.

gdb/ChangeLog:

	* inf-ptrace.h (follow_fork, insert_fork_catchpoint)
	(remove_fork_catchpoint, post_startup_inferior)
	(post_attach): Move...
	* obsd-nat.h (follow_fork, insert_fork_catchpoint)
	(remove_fork_catchpoint, post_startup_inferior)
	(post_attach): ...here.
	* inf-ptrace.c (follow_fork, insert_fork_catchpoint)
	(remove_fork_catchpoint, post_startup_inferior)
	(post_attach): Move...
	* obsd-nat.c (follow_fork, insert_fork_catchpoint)
	(remove_fork_catchpoint, post_startup_inferior)
	(post_attach): ...here.
This commit is contained in:
Kamil Rytarowski
2020-04-16 17:36:32 +02:00
parent 86e887ae11
commit 7632c6ce2b
5 changed files with 90 additions and 81 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
gdb/ChangeLog
View File

@ -1,3 +1,18 @@
2020-04-24 Kamil Rytarowski <n54@gmx.com>
* inf-ptrace.h (follow_fork, insert_fork_catchpoint)
(remove_fork_catchpoint, post_startup_inferior)
(post_attach): Move...
* obsd-nat.h (follow_fork, insert_fork_catchpoint)
(remove_fork_catchpoint, post_startup_inferior)
(post_attach): ...here.
* inf-ptrace.c (follow_fork, insert_fork_catchpoint)
(remove_fork_catchpoint, post_startup_inferior)
(post_attach): Move...
* obsd-nat.c (follow_fork, insert_fork_catchpoint)
(remove_fork_catchpoint, post_startup_inferior)
(post_attach): ...here.
2020-04-24 Tom Tromey <tromey@adacore.com>
* nat/windows-nat.h (struct windows_thread_info)

70
gdb/inf-ptrace.c
View File

@ -68,42 +68,6 @@ typedef std::unique_ptr<struct target_ops, target_unpusher> target_unpush_up;
inf_ptrace_target::~inf_ptrace_target ()
{}
#ifdef PT_GET_PROCESS_STATE
/* Target hook for follow_fork. On entry and at return inferior_ptid is
the ptid of the followed inferior. */
bool
inf_ptrace_target::follow_fork (bool follow_child, bool detach_fork)
{
if (!follow_child)
{
struct thread_info *tp = inferior_thread ();
pid_t child_pid = tp->pending_follow.value.related_pid.pid ();
/* Breakpoints have already been detached from the child by
infrun.c. */
if (ptrace (PT_DETACH, child_pid, (PTRACE_TYPE_ARG3)1, 0) == -1)
perror_with_name (("ptrace"));
}
return false;
}
int
inf_ptrace_target::insert_fork_catchpoint (int pid)
{
return 0;
}
int
inf_ptrace_target::remove_fork_catchpoint (int pid)
{
return 0;
}
#endif /* PT_GET_PROCESS_STATE */
/* Prepare to be traced. */
@ -159,23 +123,6 @@ inf_ptrace_target::create_inferior (const char *exec_file,
target_post_startup_inferior (ptid);
}
#ifdef PT_GET_PROCESS_STATE
void
inf_ptrace_target::post_startup_inferior (ptid_t pid)
{
ptrace_event_t pe;
/* Set the initial event mask. */
memset (&pe, 0, sizeof pe);
pe.pe_set_event |= PTRACE_FORK;
if (ptrace (PT_SET_EVENT_MASK, pid.pid (),
(PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
perror_with_name (("ptrace"));
}
#endif
/* Clean up a rotting corpse of an inferior after it died. */
void
@ -255,23 +202,6 @@ inf_ptrace_target::attach (const char *args, int from_tty)
unpusher.release ();
}
#ifdef PT_GET_PROCESS_STATE
void
inf_ptrace_target::post_attach (int pid)
{
ptrace_event_t pe;
/* Set the initial event mask. */
memset (&pe, 0, sizeof pe);
pe.pe_set_event |= PTRACE_FORK;
if (ptrace (PT_SET_EVENT_MASK, pid,
(PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
perror_with_name (("ptrace"));
}
#endif
/* Detach from the inferior. If FROM_TTY is non-zero, be chatty about it. */
void

11
gdb/inf-ptrace.h
View File

@ -43,17 +43,6 @@ struct inf_ptrace_target : public inf_child_target
void create_inferior (const char *, const std::string &,
char **, int) override;
#ifdef PT_GET_PROCESS_STATE
bool follow_fork (bool, bool) override;
int insert_fork_catchpoint (int) override;
int remove_fork_catchpoint (int) override;
void post_startup_inferior (ptid_t) override;
void post_attach (int) override;
#endif
void mourn_inferior () override;

63
gdb/obsd-nat.c
View File

@ -161,3 +161,66 @@ obsd_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
}
#endif /* PT_GET_THREAD_FIRST */
#ifdef PT_GET_PROCESS_STATE
void
obsd_nat_target::post_attach (int pid)
{
ptrace_event_t pe;
/* Set the initial event mask. */
memset (&pe, 0, sizeof pe);
pe.pe_set_event |= PTRACE_FORK;
if (ptrace (PT_SET_EVENT_MASK, pid,
(PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
perror_with_name (("ptrace"));
}
void
obsd_nat_target::post_startup_inferior (ptid_t pid)
{
ptrace_event_t pe;
/* Set the initial event mask. */
memset (&pe, 0, sizeof pe);
pe.pe_set_event |= PTRACE_FORK;
if (ptrace (PT_SET_EVENT_MASK, pid.pid (),
(PTRACE_TYPE_ARG3)&pe, sizeof pe) == -1)
perror_with_name (("ptrace"));
}
/* Target hook for follow_fork. On entry and at return inferior_ptid is
the ptid of the followed inferior. */
bool
obsd_nat_target::follow_fork (bool follow_child, bool detach_fork)
{
if (!follow_child)
{
struct thread_info *tp = inferior_thread ();
pid_t child_pid = tp->pending_follow.value.related_pid.pid ();
/* Breakpoints have already been detached from the child by
infrun.c. */
if (ptrace (PT_DETACH, child_pid, (PTRACE_TYPE_ARG3)1, 0) == -1)
perror_with_name (("ptrace"));
}
return false;
}
int
obsd_nat_target::insert_fork_catchpoint (int pid)
{
return 0;
}
int
obsd_nat_target::remove_fork_catchpoint (int pid)
{
return 0;
}
#endif /* PT_GET_PROCESS_STATE */

12
gdb/obsd-nat.h
View File

@ -28,6 +28,18 @@ class obsd_nat_target : public inf_ptrace_target
std::string pid_to_str (ptid_t) override;
void update_thread_list () override;
ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
#ifdef PT_GET_PROCESS_STATE
bool follow_fork (bool, bool) override;
int insert_fork_catchpoint (int) override;
int remove_fork_catchpoint (int) override;
void post_startup_inferior (ptid_t) override;
void post_attach (int) override;
#endif
};
#endif /* obsd-nat.h */