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ANDROID: Add vendor hooks to signal.

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Add vendor hook to get signal for vendor-specific tuning.

Bug: 184898838

Signed-off-by: Zhuguangqing <zhuguangqing@xiaomi.com>
Change-Id: I83a28b0a6eb413976f4c57f2314d008ad792fa0d
This commit is contained in:
Zhuguangqing
2021-03-10 14:56:02 +08:00
committed by Guangqing Zhu
parent 128b8a7ad2
commit d623f1ff72
3 changed files with 22 additions and 1 deletions
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2
drivers/android/vendor_hooks.c
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@@ -49,6 +49,7 @@
#include <trace/hooks/memory.h> #include <trace/hooks/memory.h>
#include <trace/hooks/typec.h> #include <trace/hooks/typec.h>
#include <trace/hooks/gpiolib.h> #include <trace/hooks/gpiolib.h>
#include <trace/hooks/signal.h>
/* /*
* Export tracepoints that act as a bare tracehook (ie: have no trace event * Export tracepoints that act as a bare tracehook (ie: have no trace event
@@ -73,6 +74,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_transaction_init);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_set_priority); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_set_priority);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_restore_priority); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_restore_priority);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_wakeup_ilocked); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_wakeup_ilocked);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_do_send_sig_info);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_init); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_init);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_wake); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_wake);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_write_finished); EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_write_finished);

17
include/trace/hooks/signal.h Normal file
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@@ -0,0 +1,17 @@
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM signal
#undef TRACE_INCLUDE_PATH
#define TRACE_INCLUDE_PATH trace/hooks
#if !defined(_TRACE_HOOK_SIGNAL_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_HOOK_SIGNAL_H
#include <linux/tracepoint.h>
#include <trace/hooks/vendor_hooks.h>
struct task_struct;
DECLARE_HOOK(android_vh_do_send_sig_info,
TP_PROTO(int sig, struct task_struct *killer, struct task_struct *dst),
TP_ARGS(sig, killer, dst));
#endif /* _TRACE_HOOK_SIGNAL_H */
/* This part must be outside protection */
#include <trace/define_trace.h>

4
kernel/signal.c
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@@ -57,6 +57,8 @@
#include <asm/siginfo.h> #include <asm/siginfo.h>
#include <asm/cacheflush.h> #include <asm/cacheflush.h>
#undef CREATE_TRACE_POINTS
#include <trace/hooks/signal.h>
/* /*
* SLAB caches for signal bits. * SLAB caches for signal bits.
*/ */
@@ -1299,7 +1301,7 @@ int do_send_sig_info(int sig, struct kernel_siginfo *info, struct task_struct *p
{ {
unsigned long flags; unsigned long flags;
int ret = -ESRCH; int ret = -ESRCH;
trace_android_vh_do_send_sig_info(sig, current, p);
if (lock_task_sighand(p, &flags)) { if (lock_task_sighand(p, &flags)) {
ret = send_signal(sig, info, p, type); ret = send_signal(sig, info, p, type);
unlock_task_sighand(p, &flags); unlock_task_sighand(p, &flags);