[PATCH 03/31] tracehooks: add utrace hooks
Add the necessary utrace hooks in the tracehooks which were not
removed yet.
Signed-off-by: Oleg Nesterov <oleg(a)redhat.com>
---
include/linux/tracehook.h | 22 +++++++++++++++++++++-
1 files changed, 21 insertions(+), 1 deletions(-)
diff --git a/include/linux/tracehook.h b/include/linux/tracehook.h
index a71a292..8cc28bc 100644
--- a/include/linux/tracehook.h
+++ b/include/linux/tracehook.h
@@ -49,6 +49,7 @@
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/security.h>
+#include <linux/utrace.h>
struct linux_binprm;
/*
@@ -96,6 +97,9 @@ static inline void ptrace_report_syscall(struct pt_regs *regs)
static inline __must_check int tracehook_report_syscall_entry(
struct pt_regs *regs)
{
+ if ((task_utrace_flags(current) & UTRACE_EVENT(SYSCALL_ENTRY)) &&
+ utrace_report_syscall_entry(regs))
+ return 1;
ptrace_report_syscall(regs);
return 0;
}
@@ -119,6 +123,9 @@ static inline __must_check int tracehook_report_syscall_entry(
*/
static inline void tracehook_report_syscall_exit(struct pt_regs *regs, int step)
{
+ if (task_utrace_flags(current) & UTRACE_EVENT(SYSCALL_EXIT))
+ utrace_report_syscall_exit(regs);
+
if (step) {
siginfo_t info;
user_single_step_siginfo(current, regs, &info);
@@ -148,6 +155,8 @@ static inline void tracehook_signal_handler(int sig, siginfo_t *info,
const struct k_sigaction *ka,
struct pt_regs *regs, int stepping)
{
+ if (task_utrace_flags(current))
+ utrace_signal_handler(current, stepping);
if (stepping)
ptrace_notify(SIGTRAP);
}
@@ -179,10 +188,21 @@ static inline void set_notify_resume(struct task_struct *task)
* asynchronously, this will be called again before we return to
* user mode.
*
- * Called without locks.
+ * Called without locks. However, on some machines this may be
+ * called with interrupts disabled.
*/
static inline void tracehook_notify_resume(struct pt_regs *regs)
{
+ struct task_struct *task = current;
+ /*
+ * Prevent the following store/load from getting ahead of the
+ * caller which clears TIF_NOTIFY_RESUME. This pairs with the
+ * implicit mb() before setting TIF_NOTIFY_RESUME in
+ * set_notify_resume().
+ */
+ smp_mb();
+ if (task_utrace_flags(task))
+ utrace_resume(task, regs);
}
#endif /* TIF_NOTIFY_RESUME */
--
1.5.5.1