Messages in this thread Patch in this message | | | Date | Fri, 12 Jun 2009 17:24:49 -0400 | From | Jason Baron <> | Subject | [PATCH 3/7] add syscall tracepoints |
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Introduce a new 'DECLARE_TRACE_REG()' macro, so that tracepoints can associate an external register/unregister function.
Signed-off-by: Jason Baron <jbaron@redhat.com>
--- include/linux/tracepoint.h | 27 +++++++++++++++++++++++---- 1 files changed, 23 insertions(+), 4 deletions(-)
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index 14df7e6..9a3660b 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -61,7 +61,7 @@ struct tracepoint { * not add unwanted padding between the beginning of the section and the * structure. Force alignment to the same alignment as the section start. */ -#define DECLARE_TRACE(name, proto, args) \ +#define DECLARE_TRACE_REG(name, proto, args, reg, unreg) \ extern struct tracepoint __tracepoint_##name; \ static inline void trace_##name(proto) \ { \ @@ -71,13 +71,29 @@ struct tracepoint { } \ static inline int register_trace_##name(void (*probe)(proto)) \ { \ - return tracepoint_probe_register(#name, (void *)probe); \ + int ret; \ + void (*func)(void) = (void (*)(void))reg; \ + \ + ret = tracepoint_probe_register(#name, (void *)probe); \ + if (func && !ret) \ + func(); \ + return ret; \ } \ static inline int unregister_trace_##name(void (*probe)(proto)) \ { \ - return tracepoint_probe_unregister(#name, (void *)probe);\ + int ret; \ + void (*func)(void) = (void (*)(void))unreg; \ + \ + ret = tracepoint_probe_unregister(#name, (void *)probe);\ + if (func && !ret) \ + func(); \ + return ret; \ } + +#define DECLARE_TRACE(name, proto, args) \ + DECLARE_TRACE_REG(name, TP_PROTO(proto), TP_ARGS(args), 0, 0); + #define DEFINE_TRACE(name) \ static const char __tpstrtab_##name[] \ __attribute__((section("__tracepoints_strings"))) = #name; \ @@ -94,7 +110,7 @@ extern void tracepoint_update_probe_range(struct tracepoint *begin, struct tracepoint *end); #else /* !CONFIG_TRACEPOINTS */ -#define DECLARE_TRACE(name, proto, args) \ +#define DECLARE_TRACE_REG(name, proto, args, reg, unreg) \ static inline void _do_trace_##name(struct tracepoint *tp, proto) \ { } \ static inline void trace_##name(proto) \ @@ -108,6 +124,9 @@ extern void tracepoint_update_probe_range(struct tracepoint *begin, return -ENOSYS; \ } +#define DECLARE_TRACE(name, proto, args) \ + DECLARE_TRACE_REG(name, TP_PROTO(proto), TP_ARGS(args), 0, 0); + #define DEFINE_TRACE(name) #define EXPORT_TRACEPOINT_SYMBOL_GPL(name) #define EXPORT_TRACEPOINT_SYMBOL(name) -- 1.6.0.6
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