From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 6ED73302177; Tue, 2 Dec 2025 08:16:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764663408; cv=none; b=Qp9btFid6RsXAYzktQllYYkqhXqulHViW/CC5s0+pVyQ+dZlTYNjHUy4Jfm/yFIFwcAFqv0JKIunREp/ug92G8dpq4D+l4ZNWEs8zoHvF1kRRm4EVenJSRRmyTot8TAxU8GpAjmfpdOSuSf2Mkpt8wA86WCRyxFQABZBp4BGlNg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764663408; c=relaxed/simple; bh=6AHEiPJOEAyaqlW9GQvpF6pPbppvNp0fzLe1GEZEqfE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XR6IlSn4eCipN3UWHuQZPM4XITqLgHRN5UO6fCLqG2+CPBiVq5iYbhz3d2U5qbU2XVuSx6Mmv5Sgn/AwprlzmrCaQrfQkvQtz5fFoQXRpKyCwgtCfN899GGpf+QjGVL3YUungBtGzEhI6F5cTbZByJaCdrY/NjpP9u6yWY1x+SY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Zls31T/N; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Zls31T/N" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 015B4C19424; Tue, 2 Dec 2025 08:16:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764663408; bh=6AHEiPJOEAyaqlW9GQvpF6pPbppvNp0fzLe1GEZEqfE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Zls31T/NVzmjBzBSl0KjoxmgO2f2TyAKP0m8n9xfVzMtu9Lk5Nm2L7oI7LpzS1VJd dTOF8JLAG9AgbIYO+9FI3wz4d019QgoIPsT7u7l7VImiYlAf4uaJyAqCwgYBnSAQ/3 ceLMGLP/wpDqixut3fBXruXolITLV/MHi5GKA93TiN/S/+7dpSHD06WSpfRTV4ayRD o2N6rhxtoK3TuZL8iz85rvaoPHPHYftnVV5Ryp/gsWN06SRixeBiKmOyoOgmfBMZKz vDWtcE2dZTscQOBtCU2bgyp6Nvwspi+0Hq4QuPYKlu6ykHjAzH3hX324XLqO1vPQAN w/uHYxcqdWCyg== From: Namhyung Kim To: Arnaldo Carvalho de Melo , Ian Rogers , James Clark Cc: Jiri Olsa , Adrian Hunter , Peter Zijlstra , Ingo Molnar , LKML , linux-perf-users@vger.kernel.org Subject: [PATCH 4/5] perf tools: Use machine->root_dir to find /proc/kallsyms Date: Tue, 2 Dec 2025 00:16:44 -0800 Message-ID: <20251202081645.931527-5-namhyung@kernel.org> X-Mailer: git-send-email 2.52.0.158.g65b55ccf14-goog In-Reply-To: <20251202081645.931527-1-namhyung@kernel.org> References: <20251202081645.931527-1-namhyung@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This is for test functions to find the kallsyms correctly. It can find the machine from the kernel maps and use its root_dir. This is helpful to setup fake /proc directory for testing. Signed-off-by: Namhyung Kim --- tools/perf/util/symbol.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index b533fbf17a8b19a3..e90ecfd286043aa4 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -2002,6 +2002,7 @@ static char *dso__find_kallsyms(struct dso *dso, struct map *map) char sbuild_id[SBUILD_ID_SIZE]; bool is_host = false; char path[PATH_MAX]; + struct kmap *kmap = map__kmap(map); if (!dso__has_build_id(dso)) { /* @@ -2038,8 +2039,13 @@ static char *dso__find_kallsyms(struct dso *dso, struct map *map) return strdup(path); /* Use current /proc/kallsyms if possible */ - if (is_host) { proc_kallsyms: + if (kmap && kmap->kmaps) { + struct machine *machine = maps__machine(kmap->kmaps); + + scnprintf(path, sizeof(path), "%s/proc/kallsyms", machine->root_dir); + return strdup(path); + } else if (is_host) { return strdup("/proc/kallsyms"); } -- 2.52.0.158.g65b55ccf14-goog