From: Todd Kjos tkjos@google.com
aosp inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I7YFU9
Reference: https://android.googlesource.com/kernel/common/+/51681321c0ef
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In upstream commit d9a1be1be331 ("tracepoints: Do not punish non static call users"), tracepoint macros were refactored to optimize for static_call() cases. Since the Android-specific restricted vendor hook mechanism leverages tracehooks, this required equivalent refactoring in include/trace/hooks/vendor_hooks.h
Fixes: d9a1be1be331 ("tracepoints: Do not punish non static call users") Signed-off-by: Todd Kjos tkjos@google.com Change-Id: I2e01b34606e6ff0e577b76b57c47f601c32f626b Signed-off-by: Greg Kroah-Hartman gregkh@google.com Signed-off-by: Yu Liao liaoyu15@huawei.com --- include/trace/hooks/vendor_hooks.h | 34 ++++++++++++++++++------------ 1 file changed, 20 insertions(+), 14 deletions(-)
diff --git a/include/trace/hooks/vendor_hooks.h b/include/trace/hooks/vendor_hooks.h index ef8c95aaebf0..3661e5056519 100644 --- a/include/trace/hooks/vendor_hooks.h +++ b/include/trace/hooks/vendor_hooks.h @@ -53,32 +53,39 @@ #undef TRACE_HEADER_MULTI_READ #else /* TRACE_HEADER_MULTI_READ */
-#define DO_HOOK(name, proto, args, cond) \ +#ifdef CONFIG_HAVE_STATIC_CALL +#define __DO_RESTRICTED_HOOK_CALL(name, args) \ do { \ struct tracepoint_func *it_func_ptr; \ void *__data; \ - \ - if (!(cond)) \ - return; \ - \ it_func_ptr = (&__tracepoint_##name)->funcs; \ if (it_func_ptr) { \ __data = (it_func_ptr)->data; \ - __DO_TRACE_CALL(name)(args); \ + static_call(tp_func_##name)(__data, args); \ } \ } while (0) +#else +#define __DO_RESTRICTED_HOOK_CALL(name, args) __traceiter_##name(NULL, args) +#endif + +#define DO_RESTRICTED_HOOK(name, args, cond) \ + do { \ + if (!(cond)) \ + return; \ + \ + __DO_RESTRICTED_HOOK_CALL(name, TP_ARGS(args)); \ + } while (0)
-#define __DECLARE_HOOK(name, proto, args, cond, data_proto, data_args) \ +#define __DECLARE_RESTRICTED_HOOK(name, proto, args, cond, data_proto) \ extern int __traceiter_##name(data_proto); \ DECLARE_STATIC_CALL(tp_func_##name, __traceiter_##name); \ extern struct tracepoint __tracepoint_##name; \ static inline void trace_##name(proto) \ { \ if (static_key_false(&__tracepoint_##name.key)) \ - DO_HOOK(name, \ - TP_PROTO(data_proto), \ - TP_ARGS(data_args), \ - TP_CONDITION(cond)); \ + DO_RESTRICTED_HOOK(name, \ + TP_ARGS(args), \ + TP_CONDITION(cond)); \ } \ static inline bool \ trace_##name##_enabled(void) \ @@ -98,10 +105,9 @@
#undef DECLARE_RESTRICTED_HOOK #define DECLARE_RESTRICTED_HOOK(name, proto, args, cond) \ - __DECLARE_HOOK(name, PARAMS(proto), PARAMS(args), \ + __DECLARE_RESTRICTED_HOOK(name, PARAMS(proto), PARAMS(args), \ cond, \ - PARAMS(void *__data, proto), \ - PARAMS(__data, args)) + PARAMS(void *__data, proto))
#endif /* TRACE_HEADER_MULTI_READ */