From nobody Mon Nov 25 05:27:01 2024 Received: from mail-pl1-f201.google.com (mail-pl1-f201.google.com [209.85.214.201]) (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 3848C2281DF for ; Wed, 30 Oct 2024 17:01:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730307702; cv=none; b=bXKp/A6xQ7ZPjoEgTx47ZBT5xhgjUaMsWY+LWiLxoTvuHr3gKk1nmhY99ReUw544ghO4p7goSCpZD6DvYE/YHUifRGlAAta65nmhdU+O2AZu6OIB5c2EWojXElG6lK1UyZsdUGnSlEcG0kK+9HjpfmmW28DpnR+/bLezuG069Hg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730307702; c=relaxed/simple; bh=mwWMNU2YcOhr0uFI+51PcwEaKxoErJNFG8RSdI3GyaI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=iwjMuQKjv++bCBRNqeglMdCM70TDDaTI4vnvlE3DlJMoRfy/rZZ/0F18Dqe1F1vg3xgkSTyrX2Wp8YuoZWvhEK3AYwpPSZ6VeDsI5pgdm0SxrsjNnOGShAnykFBiYTuFr0eCC+L0oBNkMWbd7dOYzyY1/5nFrjci4Q4OAUcpYcI= 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=pScU+KVl; arc=none smtp.client-ip=209.85.214.201 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="pScU+KVl" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-210d5ea3cf5so466605ad.0 for ; Wed, 30 Oct 2024 10:01:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1730307698; x=1730912498; 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=sA10Y5O0VeoF6NX2oUMu+UfElR16HMwN4YXMGfeWCvo=; b=pScU+KVlK4TZMBUVAMMKIVMK44aVh6SHr7sm8m/W17DXhyK3qB58KYyuNVb018HtyO j8ynhBlrkGHtgRwouAyhEW+F8RhWaqz9IhIJjoiCB4O+AqO+EryfW8SV8SduKIFdSdMD hE9ltCDSG4pCwck6z+Kf4z8fOIK77/+DL+G+YLU9F9xyRKc8wOy4Cd7THQp0UPqL0fN7 oqVj9MWErgDqHke96DX/BkXKAVKugilAsvecOL1wRIcmsqiogMvshazxoX6Vs/hGbstC H1WQfe/UrsNoko/NSL0KE5jOXd2GcIVR8+V/DdZkB9Wu1+KVbo9eBTPq00UwtYUuoX+x RlFw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730307698; x=1730912498; 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=sA10Y5O0VeoF6NX2oUMu+UfElR16HMwN4YXMGfeWCvo=; b=EtGaL0A1beETzpx7Psi09/hS3S5e5kj8fgfa735AFB2BSaVeeiflV1JT56kthR3d8G rw1liFBKrzCDbL9hhLIuWvn4w0MuKxSoMm+E7Ug146R0DWNKu+1UlekifvhSF+RoINcb jJK1HumXko0KEpUaWx5usbM5BS6IXiliDrZisa1skWaSlaRBSOkAEfgEu35ex14RQ3Lb dNcQs9ileSeQNF6+NJi/jfEila1CYFPeoOipzE7iVE+gfWTMi15jlkobzW//b5yjk2U2 0SHCp//wQEX2ckMTVeNWeALQEQfYaezOYR6LFMgYjyU2WBmC3N8icJ8K/f3tGZ/PlZG2 YA4Q== X-Forwarded-Encrypted: i=1; AJvYcCVNY+CgebRrHvFURCbz3II9zGct8X9Uqbj0VktdNqCi/7SN0frVa4excVBYaD9g5TX1aYxI82At1i9mhzo=@vger.kernel.org X-Gm-Message-State: AOJu0YyWNk7INm+ZzwIjmRtefPegoSFCK4I5hyiF/uCT1wnV9SvPtU2p kW58UdRYaNUP1Qyu2yaHBEAzAPj+5ZRsvcHpk/JIxnKHPi5UI7A1IN2QYf01avWDSV+34fNmK+r NZaDQDPFVmIMgDtqw/Vjsz2Rjlg== X-Google-Smtp-Source: AGHT+IG4JNTCL/rKlMHYwVUsCFpKVEhAyTJnyFjPHQL5iwahzfc1ADuW63mglV/seguu8/QoGZ+s8gv8P546lgZucxc= X-Received: from samitolvanen.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:4f92]) (user=samitolvanen job=sendgmr) by 2002:a17:902:f292:b0:1fb:f1f:19ea with SMTP id d9443c01a7336-210f8f70c30mr44045ad.1.1730307698500; Wed, 30 Oct 2024 10:01:38 -0700 (PDT) Date: Wed, 30 Oct 2024 17:01:16 +0000 In-Reply-To: <20241030170106.1501763-21-samitolvanen@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241030170106.1501763-21-samitolvanen@google.com> X-Developer-Key: i=samitolvanen@google.com; a=openpgp; fpr=35CCFB63B283D6D3AEB783944CB5F6848BBC56EE X-Developer-Signature: v=1; a=openpgp-sha256; l=8520; i=samitolvanen@google.com; h=from:subject; bh=mwWMNU2YcOhr0uFI+51PcwEaKxoErJNFG8RSdI3GyaI=; b=owGbwMvMwCEWxa662nLh8irG02pJDOlKaeGvxWzVNzEKZ7GyHjB2WMX/ZM1Pda3521YeSJLxP B9wWJWzo5SFQYyDQVZMkaXl6+qtu787pb76XCQBM4eVCWQIAxenAExk8nNGhktpgT6qu11Pvi70 Od33QONdxBl+zpOdjNP6FKMuico5r2P4xTSh40IOx/vqbC7f0jBhhj7BjXlC90xbr1dvYeT17H7 FDQA= X-Mailer: git-send-email 2.47.0.163.g1226f6d8fa-goog Message-ID: <20241030170106.1501763-30-samitolvanen@google.com> Subject: [PATCH v5 09/19] gendwarfksyms: Expand structure types From: Sami Tolvanen To: Masahiro Yamada , Luis Chamberlain , Miguel Ojeda , Greg Kroah-Hartman Cc: Matthew Maurer , Alex Gaynor , Gary Guo , Petr Pavlu , Daniel Gomez , Neal Gompa , Hector Martin , Janne Grunau , Miroslav Benes , Asahi Linux , Sedat Dilek , linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-modules@vger.kernel.org, rust-for-linux@vger.kernel.org, Sami Tolvanen Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Recursively expand DWARF structure types, i.e. structs, unions, and enums. Also include relevant DWARF attributes in type strings to encode structure layout, for example. Example output with --dump-dies: subprogram ( formal_parameter structure_type &str { member pointer_type { base_type u8 byte_size(1) encoding(7) } data_ptr data_member_location(0) , member base_type usize byte_size(8) encoding(7) length data_member_lo= cation(8) } byte_size(16) alignment(8) msg ) -> base_type void Signed-off-by: Sami Tolvanen Acked-by: Neal Gompa Reviewed-by: Petr Pavlu --- scripts/gendwarfksyms/dwarf.c | 138 +++++++++++++++++++++++++- scripts/gendwarfksyms/gendwarfksyms.h | 5 + 2 files changed, 141 insertions(+), 2 deletions(-) diff --git a/scripts/gendwarfksyms/dwarf.c b/scripts/gendwarfksyms/dwarf.c index ade9b3b7b119..98191ca7cef0 100644 --- a/scripts/gendwarfksyms/dwarf.c +++ b/scripts/gendwarfksyms/dwarf.c @@ -207,9 +207,14 @@ static void process_fqn(struct die *cache, Dwarf_Die *= die) value); \ } =20 +DEFINE_PROCESS_UDATA_ATTRIBUTE(accessibility) DEFINE_PROCESS_UDATA_ATTRIBUTE(alignment) +DEFINE_PROCESS_UDATA_ATTRIBUTE(bit_size) DEFINE_PROCESS_UDATA_ATTRIBUTE(byte_size) DEFINE_PROCESS_UDATA_ATTRIBUTE(encoding) +DEFINE_PROCESS_UDATA_ATTRIBUTE(data_bit_offset) +DEFINE_PROCESS_UDATA_ATTRIBUTE(data_member_location) +DEFINE_PROCESS_UDATA_ATTRIBUTE(discr_value) =20 /* Match functions -- die_match_callback_t */ #define DEFINE_MATCH(type) \ @@ -218,7 +223,9 @@ DEFINE_PROCESS_UDATA_ATTRIBUTE(encoding) return dwarf_tag(die) =3D=3D DW_TAG_##type##_type; \ } =20 +DEFINE_MATCH(enumerator) DEFINE_MATCH(formal_parameter) +DEFINE_MATCH(member) DEFINE_MATCH(subrange) =20 bool match_all(Dwarf_Die *die) @@ -297,6 +304,10 @@ static void __process_list_type(struct state *state, s= truct die *cache, process(cache, " "); process(cache, name); } + process_accessibility_attr(cache, die); + process_bit_size_attr(cache, die); + process_data_bit_offset_attr(cache, die); + process_data_member_location_attr(cache, die); } =20 #define DEFINE_PROCESS_LIST_TYPE(type) = \ @@ -307,6 +318,7 @@ static void __process_list_type(struct state *state, st= ruct die *cache, } =20 DEFINE_PROCESS_LIST_TYPE(formal_parameter) +DEFINE_PROCESS_LIST_TYPE(member) =20 /* Container types with DW_AT_type */ static void __process_type(struct state *state, struct die *cache, @@ -339,6 +351,7 @@ DEFINE_PROCESS_TYPE(reference) DEFINE_PROCESS_TYPE(restrict) DEFINE_PROCESS_TYPE(rvalue_reference) DEFINE_PROCESS_TYPE(shared) +DEFINE_PROCESS_TYPE(template_type_parameter) DEFINE_PROCESS_TYPE(volatile) DEFINE_PROCESS_TYPE(typedef) =20 @@ -392,6 +405,107 @@ static void process_subroutine_type(struct state *sta= te, struct die *cache, __process_subroutine_type(state, cache, die, "subroutine_type"); } =20 +static void process_variant_type(struct state *state, struct die *cache, + Dwarf_Die *die) +{ + process_list_comma(state, cache); + process(cache, "variant {"); + process_linebreak(cache, 1); + check(process_die_container(state, cache, die, process_type, + match_member_type)); + process_linebreak(cache, -1); + process(cache, "}"); + process_discr_value_attr(cache, die); +} + +static void process_variant_part_type(struct state *state, struct die *cac= he, + Dwarf_Die *die) +{ + process_list_comma(state, cache); + process(cache, "variant_part {"); + process_linebreak(cache, 1); + check(process_die_container(state, cache, die, process_type, + match_all)); + process_linebreak(cache, -1); + process(cache, "}"); +} + +static int ___process_structure_type(struct state *state, struct die *cach= e, + Dwarf_Die *die) +{ + switch (dwarf_tag(die)) { + case DW_TAG_member: + case DW_TAG_variant_part: + return check(process_type(state, cache, die)); + case DW_TAG_class_type: + case DW_TAG_enumeration_type: + case DW_TAG_structure_type: + case DW_TAG_template_type_parameter: + case DW_TAG_union_type: + case DW_TAG_subprogram: + /* Skip non-member types, including member functions */ + return 0; + default: + error("unexpected structure_type child: %x", dwarf_tag(die)); + } +} + +static void __process_structure_type(struct state *state, struct die *cach= e, + Dwarf_Die *die, const char *type, + die_callback_t process_func, + die_match_callback_t match_func) +{ + process(cache, type); + process_fqn(cache, die); + process(cache, " {"); + process_linebreak(cache, 1); + + check(process_die_container(state, cache, die, process_func, + match_func)); + + process_linebreak(cache, -1); + process(cache, "}"); + + process_byte_size_attr(cache, die); + process_alignment_attr(cache, die); +} + +#define DEFINE_PROCESS_STRUCTURE_TYPE(structure) \ + static void process_##structure##_type( \ + struct state *state, struct die *cache, Dwarf_Die *die) \ + { \ + __process_structure_type(state, cache, die, \ + #structure "_type", \ + ___process_structure_type, \ + match_all); \ + } + +DEFINE_PROCESS_STRUCTURE_TYPE(class) +DEFINE_PROCESS_STRUCTURE_TYPE(structure) +DEFINE_PROCESS_STRUCTURE_TYPE(union) + +static void process_enumerator_type(struct state *state, struct die *cache, + Dwarf_Die *die) +{ + Dwarf_Word value; + + process_list_comma(state, cache); + process(cache, "enumerator"); + process_fqn(cache, die); + + if (get_udata_attr(die, DW_AT_const_value, &value)) { + process(cache, " =3D "); + process_fmt(cache, "%" PRIu64, value); + } +} + +static void process_enumeration_type(struct state *state, struct die *cach= e, + Dwarf_Die *die) +{ + __process_structure_type(state, cache, die, "enumeration_type", + process_type, match_enumerator_type); +} + static void process_base_type(struct state *state, struct die *cache, Dwarf_Die *die) { @@ -402,6 +516,16 @@ static void process_base_type(struct state *state, str= uct die *cache, process_alignment_attr(cache, die); } =20 +static void process_unspecified_type(struct state *state, struct die *cach= e, + Dwarf_Die *die) +{ + /* + * These can be emitted for stand-alone assembly code, which means we + * might run into them in vmlinux.o. + */ + process(cache, "unspecified_type"); +} + static void process_cached(struct state *state, struct die *cache, Dwarf_Die *die) { @@ -462,17 +586,27 @@ static int process_type(struct state *state, struct d= ie *parent, Dwarf_Die *die) PROCESS_TYPE(rvalue_reference) PROCESS_TYPE(shared) PROCESS_TYPE(volatile) + /* Container types */ + PROCESS_TYPE(class) + PROCESS_TYPE(structure) + PROCESS_TYPE(union) + PROCESS_TYPE(enumeration) /* Subtypes */ + PROCESS_TYPE(enumerator) PROCESS_TYPE(formal_parameter) + PROCESS_TYPE(member) PROCESS_TYPE(subrange) + PROCESS_TYPE(template_type_parameter) + PROCESS_TYPE(variant) + PROCESS_TYPE(variant_part) /* Other types */ PROCESS_TYPE(array) PROCESS_TYPE(base) PROCESS_TYPE(subroutine) PROCESS_TYPE(typedef) + PROCESS_TYPE(unspecified) default: - debug("unimplemented type: %x", tag); - break; + error("unexpected type: %x", tag); } =20 /* Update cache state and append to the parent (if any) */ diff --git a/scripts/gendwarfksyms/gendwarfksyms.h b/scripts/gendwarfksyms/= gendwarfksyms.h index d01fc1488f76..8e087a5d58e2 100644 --- a/scripts/gendwarfksyms/gendwarfksyms.h +++ b/scripts/gendwarfksyms/gendwarfksyms.h @@ -63,8 +63,13 @@ extern int dump_dies; #define checkp(expr) __check(expr, __res < 0) =20 /* Consistent aliases (DW_TAG__type) for DWARF tags */ +#define DW_TAG_enumerator_type DW_TAG_enumerator #define DW_TAG_formal_parameter_type DW_TAG_formal_parameter +#define DW_TAG_member_type DW_TAG_member +#define DW_TAG_template_type_parameter_type DW_TAG_template_type_parameter #define DW_TAG_typedef_type DW_TAG_typedef +#define DW_TAG_variant_part_type DW_TAG_variant_part +#define DW_TAG_variant_type DW_TAG_variant =20 /* * symbols.c --=20 2.47.0.163.g1226f6d8fa-goog