2701121b8f
TRACE_EVENT_FN can't be used in some circumstances like invoking trace functions from offlined CPU due to RCU usage. This patch adds the TRACE_EVENT_FN_COND macro to make such trace points conditional. Link: http://lkml.kernel.org/r/1450124286-4822-1-git-send-email-kda@linux-powerpc.org Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/*
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* Trace files that want to automate creation of all tracepoints defined
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* in their file should include this file. The following are macros that the
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* trace file may define:
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*
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* TRACE_SYSTEM defines the system the tracepoint is for
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*
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* TRACE_INCLUDE_FILE if the file name is something other than TRACE_SYSTEM.h
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* This macro may be defined to tell define_trace.h what file to include.
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* Note, leave off the ".h".
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*
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* TRACE_INCLUDE_PATH if the path is something other than core kernel include/trace
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* then this macro can define the path to use. Note, the path is relative to
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* define_trace.h, not the file including it. Full path names for out of tree
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* modules must be used.
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*/
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#ifdef CREATE_TRACE_POINTS
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/* Prevent recursion */
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#undef CREATE_TRACE_POINTS
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#include <linux/stringify.h>
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#undef TRACE_EVENT
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#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
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DEFINE_TRACE(name)
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#undef TRACE_EVENT_CONDITION
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#define TRACE_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \
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TRACE_EVENT(name, \
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PARAMS(proto), \
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PARAMS(args), \
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PARAMS(tstruct), \
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PARAMS(assign), \
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PARAMS(print))
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#undef TRACE_EVENT_FN
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#define TRACE_EVENT_FN(name, proto, args, tstruct, \
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assign, print, reg, unreg) \
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DEFINE_TRACE_FN(name, reg, unreg)
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#undef TRACE_EVENT_FN_COND
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#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \
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assign, print, reg, unreg) \
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DEFINE_TRACE_FN(name, reg, unreg)
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#undef DEFINE_EVENT
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#define DEFINE_EVENT(template, name, proto, args) \
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DEFINE_TRACE(name)
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#undef DEFINE_EVENT_FN
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#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
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DEFINE_TRACE_FN(name, reg, unreg)
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#undef DEFINE_EVENT_PRINT
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#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
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DEFINE_TRACE(name)
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#undef DEFINE_EVENT_CONDITION
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#define DEFINE_EVENT_CONDITION(template, name, proto, args, cond) \
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DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
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#undef DECLARE_TRACE
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#define DECLARE_TRACE(name, proto, args) \
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DEFINE_TRACE(name)
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#undef TRACE_INCLUDE
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#undef __TRACE_INCLUDE
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#ifndef TRACE_INCLUDE_FILE
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# define TRACE_INCLUDE_FILE TRACE_SYSTEM
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# define UNDEF_TRACE_INCLUDE_FILE
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#endif
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#ifndef TRACE_INCLUDE_PATH
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# define __TRACE_INCLUDE(system) <trace/events/system.h>
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# define UNDEF_TRACE_INCLUDE_PATH
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#else
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# define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
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#endif
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# define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
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/* Let the trace headers be reread */
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#define TRACE_HEADER_MULTI_READ
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#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
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/* Make all open coded DECLARE_TRACE nops */
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#undef DECLARE_TRACE
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#define DECLARE_TRACE(name, proto, args)
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#ifdef TRACEPOINTS_ENABLED
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#include <trace/trace_events.h>
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#include <trace/perf.h>
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#endif
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#undef TRACE_EVENT
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#undef TRACE_EVENT_FN
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#undef TRACE_EVENT_FN_COND
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#undef TRACE_EVENT_CONDITION
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#undef DECLARE_EVENT_CLASS
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#undef DEFINE_EVENT
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#undef DEFINE_EVENT_FN
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#undef DEFINE_EVENT_PRINT
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#undef DEFINE_EVENT_CONDITION
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#undef TRACE_HEADER_MULTI_READ
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#undef DECLARE_TRACE
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/* Only undef what we defined in this file */
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#ifdef UNDEF_TRACE_INCLUDE_FILE
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# undef TRACE_INCLUDE_FILE
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# undef UNDEF_TRACE_INCLUDE_FILE
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#endif
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#ifdef UNDEF_TRACE_INCLUDE_PATH
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# undef TRACE_INCLUDE_PATH
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# undef UNDEF_TRACE_INCLUDE_PATH
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#endif
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/* We may be processing more files */
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#define CREATE_TRACE_POINTS
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#endif /* CREATE_TRACE_POINTS */
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