From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-180.mta0.migadu.com (out-180.mta0.migadu.com [91.218.175.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F3D8B13FEE for ; Fri, 19 Dec 2025 00:32:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.180 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766104355; cv=none; b=dhI4w2LP5SmrCgekZSYW8KqFgMl9VPygqiJ2zjdDr+BgMSOMXrbaMJhhTBmXgdv8c0r+3Z3VVuX+yf4PgN8Codw92q7UqU0cN1vus1q7JpdqeiPbFoVXHYSyC1t6/M+UEoWsMD+tC+bbJkSOBQ1BkifsKif3N60FrVKvKcuuUQk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766104355; c=relaxed/simple; bh=314A5Tj3+5f5HtyrFVZSBb6TJbogsocJkhmlAGdVqtA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=i+VE/e4twb5mZR1FkB7oFOJgFgVH40Iqdh+uMc5W7JyT8F6E1IBr/O7w5kecgwvXMGO6gyxVr6iwDDoLXah934Z+kMup5dKZFy8Q4H5/hTxhq/HSPcreF5efeHEusz+GSqVEndMtNwRahhrL8E/tr+plw1n57IMOl6PuwGfQI40= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=abn/ceQJ; arc=none smtp.client-ip=91.218.175.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="abn/ceQJ" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1766104346; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=KntbnHhIoFklWUgq4SsR9FNc6jQvPv1wzXNXP/Xkbr8=; b=abn/ceQJHXJU04Gjq0RtdA/ero3HO8to6j+99x9L2jqt2AdIU6YL85125SAbzXUkWcV6Qb Ikaw+8ye8b0RdvaEgMUzXfS2f50VPlZX3zyE9f6rtnygXxMlLnsJmdGpsicZYa9lmlJwlE Y5HoG2tWQcH5CvPTUST3T1q1fFTPzYw= From: Ihor Solodrai To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Andrew Morton , Nathan Chancellor , Nicolas Schier , Jonathan Corbet , Tejun Heo , David Vernet , Andrea Righi , Changwoo Min , Shuah Khan , Nick Desaulniers , Bill Wendling , Justin Stitt , Alan Maguire , Donglin Peng Cc: bpf@vger.kernel.org, dwarves@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org, sched-ext@lists.linux.dev Subject: [PATCH bpf-next v5 2/8] resolve_btfids: Factor out load_btf() Date: Thu, 18 Dec 2025 16:31:41 -0800 Message-ID: <20251219003147.587098-3-ihor.solodrai@linux.dev> In-Reply-To: <20251219003147.587098-1-ihor.solodrai@linux.dev> References: <20251219003147.587098-1-ihor.solodrai@linux.dev> Precedence: bulk X-Mailing-List: dwarves@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Increase the lifetime of parsed BTF in resolve_btfids by factoring load_btf() routine out of symbols_resolve() and storing the base_btf and btf pointers in the struct object. Acked-by: Eduard Zingerman Signed-off-by: Ihor Solodrai --- tools/bpf/resolve_btfids/main.c | 47 ++++++++++++++++++++++++--------- 1 file changed, 34 insertions(+), 13 deletions(-) diff --git a/tools/bpf/resolve_btfids/main.c b/tools/bpf/resolve_btfids/main.c index 164f0c941f04..b4caae1170dd 100644 --- a/tools/bpf/resolve_btfids/main.c +++ b/tools/bpf/resolve_btfids/main.c @@ -116,6 +116,9 @@ struct object { const char *btf_path; const char *base_btf_path; + struct btf *btf; + struct btf *base_btf; + struct { int fd; Elf *elf; @@ -529,16 +532,10 @@ static int symbols_collect(struct object *obj) return 0; } -static int symbols_resolve(struct object *obj) +static int load_btf(struct object *obj) { - int nr_typedefs = obj->nr_typedefs; - int nr_structs = obj->nr_structs; - int nr_unions = obj->nr_unions; - int nr_funcs = obj->nr_funcs; - struct btf *base_btf = NULL; - int err, type_id; - struct btf *btf; - __u32 nr_types; + struct btf *base_btf = NULL, *btf = NULL; + int err; if (obj->base_btf_path) { base_btf = btf__parse(obj->base_btf_path, NULL); @@ -546,7 +543,7 @@ static int symbols_resolve(struct object *obj) if (err) { pr_err("FAILED: load base BTF from %s: %s\n", obj->base_btf_path, strerror(-err)); - return -1; + goto out_err; } } @@ -555,9 +552,30 @@ static int symbols_resolve(struct object *obj) if (err) { pr_err("FAILED: load BTF from %s: %s\n", obj->btf_path ?: obj->path, strerror(-err)); - goto out; + goto out_err; } + obj->base_btf = base_btf; + obj->btf = btf; + + return 0; + +out_err: + btf__free(base_btf); + btf__free(btf); + return err; +} + +static int symbols_resolve(struct object *obj) +{ + int nr_typedefs = obj->nr_typedefs; + int nr_structs = obj->nr_structs; + int nr_unions = obj->nr_unions; + int nr_funcs = obj->nr_funcs; + struct btf *btf = obj->btf; + int err, type_id; + __u32 nr_types; + err = -1; nr_types = btf__type_cnt(btf); @@ -615,8 +633,6 @@ static int symbols_resolve(struct object *obj) err = 0; out: - btf__free(base_btf); - btf__free(btf); return err; } @@ -824,6 +840,9 @@ int main(int argc, const char **argv) if (symbols_collect(&obj)) goto out; + if (load_btf(&obj)) + goto out; + if (symbols_resolve(&obj)) goto out; @@ -833,6 +852,8 @@ int main(int argc, const char **argv) if (!(fatal_warnings && warnings)) err = 0; out: + btf__free(obj.base_btf); + btf__free(obj.btf); if (obj.efile.elf) { elf_end(obj.efile.elf); close(obj.efile.fd); -- 2.52.0