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Commit287050d390("tracing: Add TRACE_EVENT_CONDITIONAL()") adds macros to define conditional trace events (TRACE_EVENT_CONDITIONAL) and tracepoints (DECLARE_TRACE_CONDITION), but sets up functionality for direct use only for the former. Add preprocessor bits in define_trace.h to allow usage of DECLARE_TRACE_CONDITION just like DECLARE_TRACE. Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Juri Lelli <juri.lelli@redhat.com> Link: https://lore.kernel.org/20250218123121.253551-2-gmonaco@redhat.com Fixes:287050d390("tracing: Add TRACE_EVENT_CONDITIONAL()") Link: https://lore.kernel.org/linux-trace-kernel/20250128111926.303093-1-gmonaco@redhat.com Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Gabriele Monaco <gmonaco@redhat.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
159 lines
4.6 KiB
C
159 lines
4.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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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, PARAMS(proto), PARAMS(args))
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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, PARAMS(proto), PARAMS(args))
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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, PARAMS(proto), PARAMS(args))
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#undef TRACE_EVENT_SYSCALL
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#define TRACE_EVENT_SYSCALL(name, proto, args, struct, assign, print, reg, unreg) \
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DEFINE_TRACE_SYSCALL(name, reg, unreg, PARAMS(proto), PARAMS(args))
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#undef TRACE_EVENT_NOP
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#define TRACE_EVENT_NOP(name, proto, args, struct, assign, print)
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#undef DEFINE_EVENT_NOP
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#define DEFINE_EVENT_NOP(template, name, proto, args)
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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, PARAMS(proto), PARAMS(args))
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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, PARAMS(proto), PARAMS(args))
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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, PARAMS(proto), PARAMS(args))
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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, PARAMS(proto), PARAMS(args))
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#undef DECLARE_TRACE_CONDITION
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#define DECLARE_TRACE_CONDITION(name, proto, args, cond) \
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DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
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/* If requested, create helpers for calling these tracepoints from Rust. */
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#ifdef CREATE_RUST_TRACE_POINTS
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#undef DEFINE_RUST_DO_TRACE
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#define DEFINE_RUST_DO_TRACE(name, proto, args) \
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__DEFINE_RUST_DO_TRACE(name, PARAMS(proto), PARAMS(args))
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#endif
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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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#undef DECLARE_TRACE_CONDITION
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#define DECLARE_TRACE_CONDITION(name, proto, args, cond)
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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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#include <trace/bpf_probe.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_SYSCALL
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#undef TRACE_EVENT_CONDITION
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#undef TRACE_EVENT_NOP
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#undef DEFINE_EVENT_NOP
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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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#undef DECLARE_TRACE_CONDITION
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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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#ifdef CREATE_RUST_TRACE_POINTS
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# undef DEFINE_RUST_DO_TRACE
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# define DEFINE_RUST_DO_TRACE(name, proto, args)
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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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