From patchwork Mon Sep 23 18:18:53 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 13809907 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (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 A866F1A2645 for ; Mon, 23 Sep 2024 18:19:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727115561; cv=none; b=t8suptoN2bfnWbyr3dGWpv5tMgoh6IhpO5QTf+i3qmIqvQw7/ARC3SMWP0PlNCkI6QJsM0iOCKRNFelfW0puApMtwzvISRcHF0ZbrdTuCRMUJL90Em1Tic82CesV0d2ZDWbmdYQ/GlITytKKDt9zX7AfcXyLi/TodjEBxKZ77D8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727115561; c=relaxed/simple; bh=ymRviO+a5cEV3+mp0Yi0XXSwQOhrRgtOy5SB1olfBDk=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=RPBbaz30dsUiJmvE7gqHVTtk8EL/aNkAH89tUFiO2BgSKW7ubohT6La42puKQ0fregOwJKQ1Ni1RF4g8EqWxhGT842RoApLUczJH3v8mvVrJVH4U56oXBNqKiLPQS16wfSozx+JxQIujAVxiAxuJcg/FV0NQKPi/tELOgltkVMg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--samitolvanen.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=tHUwiCD7; arc=none smtp.client-ip=209.85.128.202 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--samitolvanen.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="tHUwiCD7" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-6ddbcc96984so72918057b3.2 for ; Mon, 23 Sep 2024 11:19:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1727115559; x=1727720359; 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=Lx1zf/KMHWOofjasnauK3EaDfAHFjR3zRo1FGvEVy2g=; b=tHUwiCD7xkxmNWqmgwZfzAY5cBaOsRgxASBDefcrjBHFNKiAZWuinqTkSSdkcqFZZS Q0PdVF6byByl3XHfK7L/3ZITUUcrlfcfLtvPbJ+QcqpGnyp0oTpSaTQa3PvKj/zlN9bE njtr/0SB330F4ZFr1k5xU/+SxcRZTulPPAhUo8AI8DllKcZeKfdFnFd7XJYtUh2/1Jmu Gug+I9SNW0KyfHtVBaLDJFm8Dt2LUWgQuIAVihvJ1//ZCaz1o31NG146Z5u//31rNiZ8 U91zXfQ95RgszL17HF9w+VGKwvnxBfZywLZiQFuLONGXDzG5Jv3lTkWEbXWp3HYtaFCR BrWQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727115559; x=1727720359; 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=Lx1zf/KMHWOofjasnauK3EaDfAHFjR3zRo1FGvEVy2g=; b=DJv7rEi68AX17Cb6+EH2vmzRbmsdMTwM6vDrvvQVM/FB/K7Poz+Hh1oSAskhF7RZ4G 0565lHMRgGhxwocpiW9gx4Nfp0NysRoWCDmjuclTuyvnPEGMg39kU5IECYMVQ+4D5juh jzXZM70853KqDftga016hyPjpDY6Dzh4fOrhfLx/SC/opW89RUF3FvjX0WSDEbEJj/Tr NFo23jRY7MSTKbEZbT3tYmhg3QlzmSKqD7gOiOH/Uk7jkCaqvBeVwzd4vQVdoK7WJHoJ dqFgDgJlnDr5VtLXwErsT8JNR8P+EHdhVjrCJ7cNT089UkK+ei8qoVhJgm1YhBPF/6A3 C2/g== X-Forwarded-Encrypted: i=1; AJvYcCXKLIF2V5Cauh87KurPgZIObDzakdPDceDQ/YtzYCRRdaWJcVaw60ZtpXnEPB8G/h2QYWOcnqzp4r01Lkc=@vger.kernel.org X-Gm-Message-State: AOJu0YxaWzaIM8P5aY9Zcdu+bpomCZPHL+KQZiwddf1iSOSFsvDG4GB/ tKVrdWY6pc6y3JphQZNEiH4E3SDY8oEDZ8kndTeEI93CUI+sMgNbztCNcH+0x3sYBYo6LRtF4xD Dd1tFPGu7OmWtVaQmNPcF+/SbbA== X-Google-Smtp-Source: AGHT+IHIiX0oEVv8/+fATBQ7LD6NBHYzwVtHhVQ0EnnibVqWRuZ/lhL988HpQao5hS9ju6/+Oj1BAws9oo3moFSvy2g= X-Received: from samitolvanen.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:4f92]) (user=samitolvanen job=sendgmr) by 2002:a25:8751:0:b0:e1a:9ed2:67f4 with SMTP id 3f1490d57ef6-e2250c24608mr11792276.2.1727115558693; Mon, 23 Sep 2024 11:19:18 -0700 (PDT) Date: Mon, 23 Sep 2024 18:18:53 +0000 In-Reply-To: <20240923181846.549877-22-samitolvanen@google.com> Precedence: bulk X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240923181846.549877-22-samitolvanen@google.com> X-Developer-Key: i=samitolvanen@google.com; a=openpgp; fpr=35CCFB63B283D6D3AEB783944CB5F6848BBC56EE X-Developer-Signature: v=1; a=openpgp-sha256; l=5378; i=samitolvanen@google.com; h=from:subject; bh=ymRviO+a5cEV3+mp0Yi0XXSwQOhrRgtOy5SB1olfBDk=; b=owGbwMvMwCEWxa662nLh8irG02pJDGkfN3KWySrN/VU7q2rOIjXj7Oglc7pCZk/zeRy/PyuQd aJd5xb9jlIWBjEOBlkxRZaWr6u37v7ulPrqc5EEzBxWJpAhDFycAjCRS4qMDJuXfn3a9lyv8tyO F2syzn/t/leU3GiRriDUXj+H+RCXbT8jw5eunhVXuc68t3im9O2d8YfpHO79rwy3ys/Y1XPotYH FLQ4A X-Mailer: git-send-email 2.46.0.792.g87dc391469-goog Message-ID: <20240923181846.549877-29-samitolvanen@google.com> Subject: [PATCH v3 07/20] gendwarfksyms: Expand type modifiers and typedefs From: Sami Tolvanen To: Masahiro Yamada , Luis Chamberlain , Miguel Ojeda , Greg Kroah-Hartman Cc: Matthew Maurer , Alex Gaynor , Wedson Almeida Filho , Gary Guo , Petr Pavlu , Neal Gompa , Hector Martin , Janne Grunau , Miroslav Benes , Asahi Linux , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-modules@vger.kernel.org, rust-for-linux@vger.kernel.org, Sami Tolvanen Add support for expanding DWARF type modifiers, such as pointers, const values etc., and typedefs. These types all have DW_AT_type attribute pointing to the underlying type, and thus produce similar output. Also add linebreaks and indentation to debugging output to make it more readable. Signed-off-by: Sami Tolvanen Reviewed-by: Petr Pavlu --- scripts/gendwarfksyms/die.c | 12 +++++ scripts/gendwarfksyms/dwarf.c | 67 +++++++++++++++++++++++++++ scripts/gendwarfksyms/gendwarfksyms.h | 5 ++ 3 files changed, 84 insertions(+) diff --git a/scripts/gendwarfksyms/die.c b/scripts/gendwarfksyms/die.c index 28d89fce89fc..2829387fd815 100644 --- a/scripts/gendwarfksyms/die.c +++ b/scripts/gendwarfksyms/die.c @@ -130,6 +130,18 @@ void die_map_add_string(struct die *cd, const char *str) df->type = FRAGMENT_STRING; } +void die_map_add_linebreak(struct die *cd, int linebreak) +{ + struct die_fragment *df; + + if (!cd) + return; + + df = append_item(cd); + df->data.linebreak = linebreak; + df->type = FRAGMENT_LINEBREAK; +} + void die_map_add_die(struct die *cd, struct die *child) { struct die_fragment *df; diff --git a/scripts/gendwarfksyms/dwarf.c b/scripts/gendwarfksyms/dwarf.c index f0c881bef026..50ef58591c83 100644 --- a/scripts/gendwarfksyms/dwarf.c +++ b/scripts/gendwarfksyms/dwarf.c @@ -6,6 +6,17 @@ #include #include "gendwarfksyms.h" +static bool do_linebreak; +static int indentation_level; + +/* Line breaks and indentation for pretty-printing */ +static void process_linebreak(struct die *cache, int n) +{ + indentation_level += n; + do_linebreak = true; + die_map_add_linebreak(cache, n); +} + #define DEFINE_GET_ATTR(attr, type) \ static bool get_##attr##_attr(Dwarf_Die *die, unsigned int id, \ type *value) \ @@ -75,6 +86,12 @@ static void process(struct die *cache, const char *s) { s = s ?: ""; + if (dump_dies && do_linebreak) { + fputs("\n", stderr); + for (int i = 0; i < indentation_level; i++) + fputs(" ", stderr); + do_linebreak = false; + } if (dump_dies) fputs(s, stderr); @@ -236,6 +253,40 @@ static void process_type_attr(struct state *state, struct die *cache, process(cache, "base_type void"); } +/* Container types with DW_AT_type */ +static void __process_type(struct state *state, struct die *cache, + Dwarf_Die *die, const char *type) +{ + process(cache, type); + process_fqn(cache, die); + process(cache, " {"); + process_linebreak(cache, 1); + process_type_attr(state, cache, die); + process_linebreak(cache, -1); + process(cache, "}"); + process_byte_size_attr(cache, die); + process_alignment_attr(cache, die); +} + +#define DEFINE_PROCESS_TYPE(type) \ + static void process_##type##_type(struct state *state, \ + struct die *cache, Dwarf_Die *die) \ + { \ + __process_type(state, cache, die, #type "_type"); \ + } + +DEFINE_PROCESS_TYPE(atomic) +DEFINE_PROCESS_TYPE(const) +DEFINE_PROCESS_TYPE(immutable) +DEFINE_PROCESS_TYPE(packed) +DEFINE_PROCESS_TYPE(pointer) +DEFINE_PROCESS_TYPE(reference) +DEFINE_PROCESS_TYPE(restrict) +DEFINE_PROCESS_TYPE(rvalue_reference) +DEFINE_PROCESS_TYPE(shared) +DEFINE_PROCESS_TYPE(volatile) +DEFINE_PROCESS_TYPE(typedef) + static void process_base_type(struct state *state, struct die *cache, Dwarf_Die *die) { @@ -257,6 +308,9 @@ static void process_cached(struct state *state, struct die *cache, case FRAGMENT_STRING: process(NULL, df->data.str); break; + case FRAGMENT_LINEBREAK: + process_linebreak(NULL, df->data.linebreak); + break; case FRAGMENT_DIE: if (!dwarf_die_addr_die(dwarf_cu_getdwarf(die->cu), (void *)df->data.addr, &child)) @@ -292,7 +346,20 @@ static int process_type(struct state *state, struct die *parent, Dwarf_Die *die) } switch (tag) { + /* Type modifiers */ + PROCESS_TYPE(atomic) + PROCESS_TYPE(const) + PROCESS_TYPE(immutable) + PROCESS_TYPE(packed) + PROCESS_TYPE(pointer) + PROCESS_TYPE(reference) + PROCESS_TYPE(restrict) + PROCESS_TYPE(rvalue_reference) + PROCESS_TYPE(shared) + PROCESS_TYPE(volatile) + /* Other types */ PROCESS_TYPE(base) + PROCESS_TYPE(typedef) default: debug("unimplemented type: %x", tag); break; diff --git a/scripts/gendwarfksyms/gendwarfksyms.h b/scripts/gendwarfksyms/gendwarfksyms.h index 7df270429c21..81b8989efa22 100644 --- a/scripts/gendwarfksyms/gendwarfksyms.h +++ b/scripts/gendwarfksyms/gendwarfksyms.h @@ -62,6 +62,9 @@ extern int dump_dies; /* Error == negative values */ #define checkp(expr) __check(expr, __res < 0) +/* Consistent aliases (DW_TAG__type) for DWARF tags */ +#define DW_TAG_typedef_type DW_TAG_typedef + /* * symbols.c */ @@ -102,6 +105,7 @@ enum die_state { enum die_fragment_type { FRAGMENT_EMPTY, FRAGMENT_STRING, + FRAGMENT_LINEBREAK, FRAGMENT_DIE }; @@ -109,6 +113,7 @@ struct die_fragment { enum die_fragment_type type; union { char *str; + int linebreak; uintptr_t addr; } data; struct list_head list;