mirror of
https://github.com/raspberrypi/linux.git
synced 2025-12-27 04:22:58 +00:00
ad37bcd965
Make it possible to have Rust code call into tracepoints defined by C code. It is still required that the tracepoint is declared in a C header, and that this header is included in the input to bindgen. Instead of calling __DO_TRACE directly, the exported rust_do_trace_ function calls an inline helper function. This is because the `cond` argument does not exist at the callsite of DEFINE_RUST_DO_TRACE. __DECLARE_TRACE always emits an inline static and an extern declaration that is only used when CREATE_RUST_TRACE_POINTS is set. These should not end up in the final binary so it is not a problem that they sometimes are emitted without a user. Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Josh Poimboeuf <jpoimboe@kernel.org> Cc: Jason Baron <jbaron@akamai.com> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Wedson Almeida Filho <wedsonaf@gmail.com> Cc: " =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= " <bjorn3_gh@protonmail.com> Cc: Benno Lossin <benno.lossin@proton.me> Cc: Andreas Hindborg <a.hindborg@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Sean Christopherson <seanjc@google.com> Cc: Uros Bizjak <ubizjak@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Marc Zyngier <maz@kernel.org> Cc: Oliver Upton <oliver.upton@linux.dev> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Fuad Tabba <tabba@google.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Anup Patel <apatel@ventanamicro.com> Cc: Andrew Jones <ajones@ventanamicro.com> Cc: Alexandre Ghiti <alexghiti@rivosinc.com> Cc: Conor Dooley <conor.dooley@microchip.com> Cc: Samuel Holland <samuel.holland@sifive.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: WANG Xuerui <kernel@xen0n.name> Cc: Bibo Mao <maobibo@loongson.cn> Cc: Tiezhu Yang <yangtiezhu@loongson.cn> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Tianrui Zhao <zhaotianrui@loongson.cn> Link: https://lore.kernel.org/20241030-tracepoint-v12-2-eec7f0f8ad22@google.com Reviewed-by: Carlos Llamas <cmllamas@google.com> Reviewed-by: Gary Guo <gary@garyguo.net> Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Alice Ryhl <aliceryhl@google.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
153 lines
4.4 KiB
C
153 lines
4.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Trace files that want to automate creation of all tracepoints defined
|
|
* in their file should include this file. The following are macros that the
|
|
* trace file may define:
|
|
*
|
|
* TRACE_SYSTEM defines the system the tracepoint is for
|
|
*
|
|
* TRACE_INCLUDE_FILE if the file name is something other than TRACE_SYSTEM.h
|
|
* This macro may be defined to tell define_trace.h what file to include.
|
|
* Note, leave off the ".h".
|
|
*
|
|
* TRACE_INCLUDE_PATH if the path is something other than core kernel include/trace
|
|
* then this macro can define the path to use. Note, the path is relative to
|
|
* define_trace.h, not the file including it. Full path names for out of tree
|
|
* modules must be used.
|
|
*/
|
|
|
|
#ifdef CREATE_TRACE_POINTS
|
|
|
|
/* Prevent recursion */
|
|
#undef CREATE_TRACE_POINTS
|
|
|
|
#include <linux/stringify.h>
|
|
|
|
#undef TRACE_EVENT
|
|
#define TRACE_EVENT(name, proto, args, tstruct, assign, print) \
|
|
DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
|
|
|
|
#undef TRACE_EVENT_CONDITION
|
|
#define TRACE_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \
|
|
TRACE_EVENT(name, \
|
|
PARAMS(proto), \
|
|
PARAMS(args), \
|
|
PARAMS(tstruct), \
|
|
PARAMS(assign), \
|
|
PARAMS(print))
|
|
|
|
#undef TRACE_EVENT_FN
|
|
#define TRACE_EVENT_FN(name, proto, args, tstruct, \
|
|
assign, print, reg, unreg) \
|
|
DEFINE_TRACE_FN(name, reg, unreg, PARAMS(proto), PARAMS(args))
|
|
|
|
#undef TRACE_EVENT_FN_COND
|
|
#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct, \
|
|
assign, print, reg, unreg) \
|
|
DEFINE_TRACE_FN(name, reg, unreg, PARAMS(proto), PARAMS(args))
|
|
|
|
#undef TRACE_EVENT_SYSCALL
|
|
#define TRACE_EVENT_SYSCALL(name, proto, args, struct, assign, print, reg, unreg) \
|
|
DEFINE_TRACE_FN(name, reg, unreg, PARAMS(proto), PARAMS(args))
|
|
|
|
#undef TRACE_EVENT_NOP
|
|
#define TRACE_EVENT_NOP(name, proto, args, struct, assign, print)
|
|
|
|
#undef DEFINE_EVENT_NOP
|
|
#define DEFINE_EVENT_NOP(template, name, proto, args)
|
|
|
|
#undef DEFINE_EVENT
|
|
#define DEFINE_EVENT(template, name, proto, args) \
|
|
DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
|
|
|
|
#undef DEFINE_EVENT_FN
|
|
#define DEFINE_EVENT_FN(template, name, proto, args, reg, unreg) \
|
|
DEFINE_TRACE_FN(name, reg, unreg, PARAMS(proto), PARAMS(args))
|
|
|
|
#undef DEFINE_EVENT_PRINT
|
|
#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
|
|
DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
|
|
|
|
#undef DEFINE_EVENT_CONDITION
|
|
#define DEFINE_EVENT_CONDITION(template, name, proto, args, cond) \
|
|
DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
|
|
|
|
#undef DECLARE_TRACE
|
|
#define DECLARE_TRACE(name, proto, args) \
|
|
DEFINE_TRACE(name, PARAMS(proto), PARAMS(args))
|
|
|
|
/* If requested, create helpers for calling these tracepoints from Rust. */
|
|
#ifdef CREATE_RUST_TRACE_POINTS
|
|
#undef DEFINE_RUST_DO_TRACE
|
|
#define DEFINE_RUST_DO_TRACE(name, proto, args) \
|
|
__DEFINE_RUST_DO_TRACE(name, PARAMS(proto), PARAMS(args))
|
|
#endif
|
|
|
|
#undef TRACE_INCLUDE
|
|
#undef __TRACE_INCLUDE
|
|
|
|
#ifndef TRACE_INCLUDE_FILE
|
|
# define TRACE_INCLUDE_FILE TRACE_SYSTEM
|
|
# define UNDEF_TRACE_INCLUDE_FILE
|
|
#endif
|
|
|
|
#ifndef TRACE_INCLUDE_PATH
|
|
# define __TRACE_INCLUDE(system) <trace/events/system.h>
|
|
# define UNDEF_TRACE_INCLUDE_PATH
|
|
#else
|
|
# define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h)
|
|
#endif
|
|
|
|
# define TRACE_INCLUDE(system) __TRACE_INCLUDE(system)
|
|
|
|
/* Let the trace headers be reread */
|
|
#define TRACE_HEADER_MULTI_READ
|
|
|
|
#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
|
|
|
|
/* Make all open coded DECLARE_TRACE nops */
|
|
#undef DECLARE_TRACE
|
|
#define DECLARE_TRACE(name, proto, args)
|
|
|
|
#ifdef TRACEPOINTS_ENABLED
|
|
#include <trace/trace_events.h>
|
|
#include <trace/perf.h>
|
|
#include <trace/bpf_probe.h>
|
|
#endif
|
|
|
|
#undef TRACE_EVENT
|
|
#undef TRACE_EVENT_FN
|
|
#undef TRACE_EVENT_FN_COND
|
|
#undef TRACE_EVENT_SYSCALL
|
|
#undef TRACE_EVENT_CONDITION
|
|
#undef TRACE_EVENT_NOP
|
|
#undef DEFINE_EVENT_NOP
|
|
#undef DECLARE_EVENT_CLASS
|
|
#undef DEFINE_EVENT
|
|
#undef DEFINE_EVENT_FN
|
|
#undef DEFINE_EVENT_PRINT
|
|
#undef DEFINE_EVENT_CONDITION
|
|
#undef TRACE_HEADER_MULTI_READ
|
|
#undef DECLARE_TRACE
|
|
|
|
/* Only undef what we defined in this file */
|
|
#ifdef UNDEF_TRACE_INCLUDE_FILE
|
|
# undef TRACE_INCLUDE_FILE
|
|
# undef UNDEF_TRACE_INCLUDE_FILE
|
|
#endif
|
|
|
|
#ifdef UNDEF_TRACE_INCLUDE_PATH
|
|
# undef TRACE_INCLUDE_PATH
|
|
# undef UNDEF_TRACE_INCLUDE_PATH
|
|
#endif
|
|
|
|
#ifdef CREATE_RUST_TRACE_POINTS
|
|
# undef DEFINE_RUST_DO_TRACE
|
|
# define DEFINE_RUST_DO_TRACE(name, proto, args)
|
|
#endif
|
|
|
|
/* We may be processing more files */
|
|
#define CREATE_TRACE_POINTS
|
|
|
|
#endif /* CREATE_TRACE_POINTS */
|