From nobody Mon Nov 25 04:23:56 2024 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (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 6A69D1DE3B6 for ; Thu, 21 Nov 2024 20:42:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732221772; cv=none; b=HbgoimcNbHStQilvlOS0KQqIOZfv1R5AEtYDFwwl6esiBsIc2O/6Oa+nlIfBY5O8z52ETJOrpWsgAo+OSj1QshPmr426wyGqYKmXFGHdhjiqhoTjd7j8U2Rz+zUZ63Zc4/OkJzuvDRCVGhE212RB8eVMN4Rqu6FY27m1n7UWTYA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732221772; c=relaxed/simple; bh=EpEiwt7t8/l21Jj3miJP0gC9vVnTUFc+quBwCd1Ktlw=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=lZJGwAsA8QPrxsYdPoJhcPPFnMXW88eThkL4ZoInFsPIkB6gIb4pQ3FkNJDg/xYP+pX3S/XhfewB3iSaVNT9GBTcSfnHA909ll7u+Cat8ZGWlgqH7xZD4R84zR/qFBLTUgOXxuu99p46S19DVS78DN4zptvvKRBuDSch8JY0kgE= 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=17jb6RIl; arc=none smtp.client-ip=209.85.128.201 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="17jb6RIl" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-6ee7ccc0286so22458847b3.2 for ; Thu, 21 Nov 2024 12:42:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1732221769; x=1732826569; 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=+FP9o/YfL4D1uYj1bzcTvHkYKEts/YT26fpG2G23v2E=; b=17jb6RIlr1ofR2WLf12OSGGCNUEgJQbvpLbaru9hJcpDyTT083lj1KdzzRHoBpt/5h mLnElzH8TpNuJRbKBVa4zoYr5eyjz5tsQUNoqMGFNquhdeGGmlNDMYeIj7Pn6m7VQY65 xzwv/8AnQdcAB9V/GnQN1g8tPmDDMx2+61Xu3egChwdFP21QxX4G1wwr7zT+wsgQ+HY4 286EYRpw+5Wjj9SJHtrdXVgFIsViXS0X3KwagTbQFKv81Ns2lrQmgCf0ZvSGWbfpoTU3 5mZN9MGfETtJRVCzlBDx+bk3SIzi5mQDbER1CK1x+jquH6BVCeXHem6IkFNjFxyTseVl AMPw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732221769; x=1732826569; 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=+FP9o/YfL4D1uYj1bzcTvHkYKEts/YT26fpG2G23v2E=; b=rciur2mjgMdWGxBe1ENOzf57FlnGiFbIPJg2dMq0bsef3w4r0Ddt8AD756b8ckuV7n sRzeh7YisGiBKLCgOqosqBHX+AawiJKSeyUqyrea+PsCZ3awlvoSWnRECgoryIdmY3YW dGNUjm50b+Bn3/KjnFwzLsCpkdAl0IkKk4/rkerZr69PEpxvDRmywpebgOldMewXR/n4 jEgIxr8PaThXkAxRIpkzfQLlTOO4AXla3Gm+V869uZqR5BlIy3iS512RqpPXntRsk/PZ 0JRSPk/Divmm5PgFocpB/3+dQOjlF8Px2XWIVssLue2Sk+HP5WH6HtOd82RKN8gq3Tue UToQ== X-Forwarded-Encrypted: i=1; AJvYcCWW2Su/VBQrfdpFFh69A0jU2GuVs6B/HwsBqNpxO/MUCEKpxCWrBk5C0drOQkp3FX34xHUnT2Rva2UvYY4=@vger.kernel.org X-Gm-Message-State: AOJu0YzsTX/lg4SAxPWRccr8nKbaT9H99Rp6UqqwvsB4YPk3XzvAj3rw CKAw7nAacpz2/FQ4mkH6uC/K5gQUeC67UV9t8k27kRZ88PqMfwCt4BPok2O42SgENHZDZF7gKMO l7UkVJBNOvj5moV0KMPYAwukz2A== X-Google-Smtp-Source: AGHT+IG4g8PJ8qDS8zrUZBIJ1tgSXB0jAGKPKnAwvcXPyRB1CTbmME2/hkupudXyRd8g1ALcyVsXWApn4i0ip7pp+eY= X-Received: from samitolvanen.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:4f92]) (user=samitolvanen job=sendgmr) by 2002:a05:690c:67c1:b0:6e3:d670:f62a with SMTP id 00721157ae682-6eee0a1c484mr57817b3.3.1732221769533; Thu, 21 Nov 2024 12:42:49 -0800 (PST) Date: Thu, 21 Nov 2024 20:42:29 +0000 In-Reply-To: <20241121204220.2378181-20-samitolvanen@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241121204220.2378181-20-samitolvanen@google.com> X-Developer-Key: i=samitolvanen@google.com; a=openpgp; fpr=35CCFB63B283D6D3AEB783944CB5F6848BBC56EE X-Developer-Signature: v=1; a=openpgp-sha256; l=8481; i=samitolvanen@google.com; h=from:subject; bh=EpEiwt7t8/l21Jj3miJP0gC9vVnTUFc+quBwCd1Ktlw=; b=owGbwMvMwCEWxa662nLh8irG02pJDOn2sw3tdHvFJjmG71xjoH1xx+alB08c7Hob/SOn4EJwV mq1GM+6jlIWBjEOBlkxRZaWr6u37v7ulPrqc5EEzBxWJpAhDFycAjARtn+MDL+5dppzlvHopWi9 /Nm+T0aYZ8HJ27Ha1rUsrGxdFinOWQz/XSdsiQj+1NR0Zanbk00PDpypPlEprnNliuUBRcXA6Nb tbAA= X-Mailer: git-send-email 2.47.0.371.ga323438b13-goog Message-ID: <20241121204220.2378181-28-samitolvanen@google.com> Subject: [PATCH v6 08/18] 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 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 39bdc9e121b5..2646e11595ab 100644 --- a/scripts/gendwarfksyms/gendwarfksyms.h +++ b/scripts/gendwarfksyms/gendwarfksyms.h @@ -65,8 +65,13 @@ 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 2.47.0.371.ga323438b13-goog