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authorRoland McGrath <roland@redhat.com>2008-07-25 19:45:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-26 12:00:09 -0700
commit445a91d2fe3667fb8fc251433645f686933cf56a (patch)
tree496f0715ba3079f3bf98e9808480fe7f25872b16 /include
parent35de254dc60f91004b3b5ebb1fc7b2c3093d6032 (diff)
downloadop-kernel-dev-445a91d2fe3667fb8fc251433645f686933cf56a.zip
op-kernel-dev-445a91d2fe3667fb8fc251433645f686933cf56a.tar.gz
tracehook: tracehook_consider_fatal_signal
This defines tracehook_consider_fatal_signal() has a fine-grained hook for deciding to skip the special cases for a fatal signal, as ptrace does. There is no change, only cleanup. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Reviewed-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/tracehook.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h
index 8cffd34..8b4c15e 100644
--- a/include/linux/tracehook.h
+++ b/include/linux/tracehook.h
@@ -331,4 +331,25 @@ static inline int tracehook_consider_ignored_signal(struct task_struct *task,
return (task_ptrace(task) & PT_PTRACED) != 0;
}
+/**
+ * tracehook_consider_fatal_signal - suppress special handling of fatal signal
+ * @task: task receiving the signal
+ * @sig: signal number being sent
+ * @handler: %SIG_DFL or %SIG_IGN
+ *
+ * Return nonzero to prevent special handling of this termination signal.
+ * Normally @handler is %SIG_DFL. It can be %SIG_IGN if @sig is ignored,
+ * in which case force_sig() is about to reset it to %SIG_DFL.
+ * When this returns zero, this signal might cause a quick termination
+ * that does not give the debugger a chance to intercept the signal.
+ *
+ * Called with or without @task->sighand->siglock held.
+ */
+static inline int tracehook_consider_fatal_signal(struct task_struct *task,
+ int sig,
+ void __user *handler)
+{
+ return (task_ptrace(task) & PT_PTRACED) != 0;
+}
+
#endif /* <linux/tracehook.h> */
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