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systemtap
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stp_tracepoint.h
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/* SystemTap tracepoint interface header * Copyright (C) 2014 Red Hat Inc. * * This file is part of systemtap, and is free software. You can * redistribute it and/or modify it under the terms of the GNU General * Public License (GPL); either version 2, or (at your option) any * later version. */ #ifndef _STP_TRACEPOINT_H_ #define _STP_TRACEPOINT_H_ #include <linux/tracepoint.h> #define intptr_t long /* Starting in 2.6.35, at the same time NOARGS was added, the callback * always has a void* as the first parameter. PR11599 */ #ifdef DECLARE_TRACE_NOARGS #define STAPCONF_TRACEPOINT_HAS_DATA #endif #ifdef STAPCONF_TRACEPOINT_HAS_DATA #define STP_TRACE_ENTER(fn, args...) \ void fn (void *__data __attribute__ ((unused)), ##args) #define STP_TRACE_ENTER_NOARGS(fn) STP_TRACE_ENTER(fn) #ifdef STAPCONF_TRACEPOINT_STRINGS #define STP_TRACE_REGISTER(name, fn) register_trace_##name(fn, NULL) #define STP_TRACE_UNREGISTER(name, fn) unregister_trace_##name(fn, NULL) #else /* STAPCONF_TRACEPOINT_STRINGS */ #define STAP_NEED_TRACEPOINTS 1 int stp_tracepoint_probe_register(const char *name, void *probe, void *data); int stp_tracepoint_probe_unregister(const char *name, void *probe, void *data); /* Type-checked wrappers to make sure the fn signature is correct. */ #define STP_TRACE_REGISTER(name, fn) ({ \ check_trace_callback_type_##name(fn); \ stp_tracepoint_probe_register(#name, (void*)fn, NULL); \ }) #define STP_TRACE_UNREGISTER(name, fn) ({ \ check_trace_callback_type_##name(fn); \ stp_tracepoint_probe_unregister(#name, (void*)fn, NULL); \ }) #endif /* STAPCONF_TRACEPOINT_STRINGS */ #else /* STAPCONF_TRACEPOINT_HAS_DATA */ #define STP_TRACE_ENTER(fn, args...) void fn (args) #define STP_TRACE_ENTER_NOARGS(fn) STP_TRACE_ENTER(fn, void) #define STP_TRACE_REGISTER(name, fn) register_trace_##name(fn) #define STP_TRACE_UNREGISTER(name, fn) unregister_trace_##name(fn) #endif /* STAPCONF_TRACEPOINT_HAS_DATA */ #define STP_TRACE_ENTER_REAL(fn, args...) void fn (args) #define STP_TRACE_ENTER_REAL_NOARGS(fn) STP_TRACE_ENTER_REAL(fn, void) #endif /* _STP_TRACEPOINT_H_ */