From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f73.google.com (mail-wr1-f73.google.com [209.85.221.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9B4F8289816 for ; Tue, 6 May 2025 16:48:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746550135; cv=none; b=RYLbGTNJm95B/1VTeEqk4VBCQVMci5nEHXoCkDWe3cgKsLjnSuc5qZgMCoTduqd7H37ldnrYX6ugTpKmIZt2e0h8fp5INEVldtQFeQ6zSNkQHpieZmQeB+RFs/JSoyQr6vXFtKPrCbDO2VsLr5HZ8OGz3NDxPTSlZ+6P0pin4gs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746550135; c=relaxed/simple; bh=y8rcnohCNx6fnvmwXaaVmdXgnbol8xb6JsiUxsOpG8A=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=AvcdD/kcDoLyR/e25s+Lay0K1ZsE++vLyhLJo/hZY6vsjWNJ74H4N8mNoqPss7QamXcH6bJdN3WFHmmoaNcn6JzsLDgoJxIVPlQaKha29uqp+b+wbbBp3u70SqgVMXEyNMAoswPRsYdSUlfjz5DC8YXdYM7oMI/PewFXVOmBjiY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=17ozlMEZ; arc=none smtp.client-ip=209.85.221.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--vdonnefort.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="17ozlMEZ" Received: by mail-wr1-f73.google.com with SMTP id ffacd0b85a97d-3912fc9861cso1594854f8f.1 for ; Tue, 06 May 2025 09:48:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1746550131; x=1747154931; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=UccoAy7t6DYOqtAFght6GRLYbDtLDUJp2RBCqm6XV8E=; b=17ozlMEZFLaOtjn4OBIh/yMTAwYJB+jQfwRv+tNEwlnsgkmPAxfIphIKHxX1lYMZU5 bI5IO/37262GSLeeVWaS+z7R37JkSImNWzl48AxSeuM8Jqoaa+lHRUzyOg3x3qyy+ZSx nDtDXdjjzFsLPtZDC7Hu2ri2SOb9stBPenCjcPuP8YwThBzSI56d74TZ9Bdmr5Yajcam DMHaI9lK6u1WNwMrNRZgx7htZXKP/I8B/57jxt2JSsVk0gRuDwMZjtrmKAKlbmwBkgE+ bdhkKtRBoWqal1GTy40J/ydNXSI33YMoLVIURpeaRqerSV781/Wju381eE+MDbRIj+RS fQvA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746550131; x=1747154931; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=UccoAy7t6DYOqtAFght6GRLYbDtLDUJp2RBCqm6XV8E=; b=fQVNqgWpfqcy1Rn+ioIb/JVK2Vhe7AqP8KwdKFP3IsYUmNm1Od8TjSuXJX+bf2QoJQ Pw3YJVu24NMjMW6lnq7UvncYIjCN7HlM9S7y1hYFcMCJgv7I4qaOOZ9nhVDnhSl4y7B0 +RrCSZWEWlyS64GaB9H2khyMfMjod85BXaR+AWEkq3s0CKPcxQHts6+UclG4zBkPcuED cULb696gdVgTUeyVE2VysYNFCXUY9WP2afD/h0nw47EncWIWtM2KIq5ufzWxVEqMfMOE 69F2qmvz/OghLGkuUFf+95ImekxiqHxisYUd/vxRk/GwL3a1uC36lwQ5kmKQg4c2wiWv byxQ== X-Forwarded-Encrypted: i=1; AJvYcCWMwe4EFaqWUTmZpfnVZUN8DM4Xa4Wr/xeGomWI86YCgANF6Z3EcamLm2UuSb4rmc/uFACoGJKItdIo5sa4KrzguN0=@vger.kernel.org X-Gm-Message-State: AOJu0YzZ598mys/HRBwK7X2W7YdD1ODWdXk+GevBSUuicGTh9HHRZnje Q+ANQhPKYlKsnz7eQLYSFjOZWu+amZm8lxprNzLt73SOtymxIwyRPwlDTEIhf6Ys4KXGDxjomX0 TmC4uowjK2YeH5KD2RA== X-Google-Smtp-Source: AGHT+IEM95jiwlSfZQ54wnNuqC2fl6D7aBnxwDMPr9V7cIV+4uN83c8dv1x96zRkvBxrXCRdBy2/bVIFl9Y7AHEs X-Received: from wmbek12.prod.google.com ([2002:a05:600c:3ecc:b0:440:5e01:286b]) (user=vdonnefort job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6000:2a6:b0:3a0:86b0:5f63 with SMTP id ffacd0b85a97d-3a0b49e5583mr173846f8f.34.1746550131142; Tue, 06 May 2025 09:48:51 -0700 (PDT) Date: Tue, 6 May 2025 17:48:03 +0100 In-Reply-To: <20250506164820.515876-1-vdonnefort@google.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250506164820.515876-1-vdonnefort@google.com> X-Mailer: git-send-email 2.49.0.967.g6a0df3ecc3-goog Message-ID: <20250506164820.515876-8-vdonnefort@google.com> Subject: [PATCH v4 07/24] tracing: Add helpers to create trace remote events From: Vincent Donnefort To: rostedt@goodmis.org, mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-trace-kernel@vger.kernel.org, maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, jstultz@google.com, qperret@google.com, will@kernel.org, kernel-team@android.com, linux-kernel@vger.kernel.org, Vincent Donnefort Content-Type: text/plain; charset="UTF-8" Declaring remote events can be cumbersome let's add a set of macros to simplify developers life. The declaration of a remote event is very similar to kernel's events: REMOTE_EVENT(name, id, RE_STRUCT( re_field(u64 foo) ), RE_PRINTK("foo=%llu", __entry->foo) ) Signed-off-by: Vincent Donnefort diff --git a/include/linux/trace_remote_event.h b/include/linux/trace_remote_event.h index 621c5dff0664..d00e85d2a633 100644 --- a/include/linux/trace_remote_event.h +++ b/include/linux/trace_remote_event.h @@ -5,6 +5,7 @@ struct trace_remote; struct trace_event_fields; +struct trace_seq; struct remote_event_hdr { unsigned short id; @@ -20,4 +21,13 @@ struct remote_event { char *print_fmt; void (*print)(void *evt, struct trace_seq *seq); }; + +#define RE_STRUCT(__args...) __args +#define re_field(__type, __field) __type __field; + +#define REMOTE_EVENT_FORMAT(__name, __struct) \ + struct remote_event_format_##__name { \ + struct remote_event_hdr hdr; \ + __struct \ + } #endif diff --git a/include/trace/define_remote_events.h b/include/trace/define_remote_events.h new file mode 100644 index 000000000000..03c9f5515c5a --- /dev/null +++ b/include/trace/define_remote_events.h @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include +#include +#include +#include + +#define REMOTE_EVENT_INCLUDE(__file) __stringify(../../__file) + +#ifdef REMOTE_EVENT_SECTION +# define __REMOTE_EVENT_SECTION(__name) __used __section(REMOTE_EVENT_SECTION"."#__name) +#else +# define __REMOTE_EVENT_SECTION(__name) +#endif + +#define __REMOTE_PRINTK_COUNT_ARGS(_0, _1, _2, _n, __args...) _n +#define REMOTE_PRINTK_COUNT_ARGS(__args...) __REMOTE_PRINTK_COUNT_ARGS(, ##__args, 2, 1, 0) + +#define __remote_printk0() \ + trace_seq_putc(seq, '\n') + +#define __remote_printk1(__fmt) \ + trace_seq_puts(seq, " " __fmt "\n") \ + +#define __remote_printk2(__fmt, __args...) \ +do { \ + trace_seq_putc(seq, ' '); \ + trace_seq_printf(seq, __fmt, __args); \ + trace_seq_putc(seq, '\n'); \ +} while (0) + +/* Apply the appropriate trace_seq sequence according to the number of arguments */ +#define remote_printk(__args...) \ + CONCATENATE(__remote_printk, REMOTE_PRINTK_COUNT_ARGS(__args))(__args) + +#define RE_PRINTK(__args...) __args + +#define REMOTE_EVENT(__name, __id, __struct, __printk) \ + REMOTE_EVENT_FORMAT(__name, __struct); \ + static void remote_event_print_##__name(void *evt, struct trace_seq *seq) \ + { \ + struct remote_event_format_##__name __maybe_unused *__entry = evt; \ + trace_seq_puts(seq, #__name); \ + remote_printk(__printk); \ + } +#include REMOTE_EVENT_INCLUDE(REMOTE_EVENT_INCLUDE_FILE) + +#undef REMOTE_EVENT +#undef RE_PRINTK +#undef re_field +#define re_field(__type, __field) \ + { \ + .type = #__type, .name = #__field, \ + .size = sizeof(__type), .align = __alignof__(__type), \ + .is_signed = is_signed_type(__type), \ + }, +#define __entry REC +#define RE_PRINTK(__fmt, __args...) "\"" __fmt "\", " __stringify(__args) +#define REMOTE_EVENT(__name, __id, __struct, __printk) \ + static struct trace_event_fields remote_event_fields_##__name[] = { \ + __struct \ + {} \ + }; \ + static char remote_event_print_fmt_##__name[] = __printk; \ + static struct remote_event __REMOTE_EVENT_SECTION(__name) \ + remote_event_##__name = { \ + .name = #__name, \ + .id = __id, \ + .fields = remote_event_fields_##__name, \ + .print_fmt = remote_event_print_fmt_##__name, \ + .print = remote_event_print_##__name, \ + } +#include REMOTE_EVENT_INCLUDE(REMOTE_EVENT_INCLUDE_FILE) -- 2.49.0.967.g6a0df3ecc3-goog