From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793692791; b=VIa2/t4XxjTBZZ5rrExMwSVVME36VsTUzu81gJgFUnFG+85J+f5VQLQdzdQVIgyFIGR/ y1hb/hbVlFIcVxUcR4qwqJKaBEqQ7iFbw6at5Akx/sIhoMPl94tJ5dkBoz6f96iKoSSUy udxb/Mbchs8KWSJNEKuu/PmyUpQJBY34OaZ0aoxumOPwmDR3f90CFOw2Y6iJJ9kdNBbIS FQcIM06bGLC1xbv79LDRBTtT37ojQO5Hv1Jg2VzhRTZ8G0QXZi4rAw2ZI4vf2/sk1RV0A uWC5CMll0NqHv1x2DsfXmwViTfojGOs+Hkw/mo/10lZaF25mLtL4upYpSgZ9prpN1XA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793692791; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=tjipW30n5WfXiCHIuo/tN0yoEdsPNYs9uCjpwtKDyuw=; b=BSVObdXJgrvWt8BmTOdc4tHbvlL1nF1auWpVQ5545Ebi8yqDeSSc9UchyXrrUOi3lzTb ggjwjXaB33CewKG9nyPyxHDN0MVLDFchM/Lc2q8LTYgVskTqYoOB0Dv2RXvbOGnbVDkbe L5HaZbSM1Nkv7tsBXmioDy689Iuia3ihtQwwumH5p1WSTjUeuhDJBXRUgRjN2DYWaZpO6 nbyxMHswqMDL/G6ZLDvpWQnstGGJ+WT/CSKe8140hq78pkQTbQoT26qoJZPHRz83OTX9F ivmYqBQVKM0NCbH87QfCeDOvUVAdiVSzxdqklo2C374FSmF+aoAO/2aR5z7PDk9NMgw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=SHFeiPcQ; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 11B6E606A329 for ; Tue, 3 Nov 2026 07:59:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=SHFeiPcQ Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4BF501F000C1; Tue, 3 Nov 2026 07:59:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793692790; bh=tjipW30n5WfXiCHIuo/tN0yoEdsPNYs9uCjpwtKDyuw=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=SHFeiPcQQW/94MTxexMAYrUW9Dyut4aq1JgGRW7bzCtKowXs88bTOQLOOwkAmjREi +Ot1cEToqtExLUQonQP5Sorjb9jMK0QkuyD8VClVuA3Gz1IRmteHZT4vpvZ8Tdc++H hdJSQMYfoH9YqsmH1n1DTUjSsO+eQANHI1op1JmW97+y6eD3pzABQEVaXQRRkwc/xg +sNhns7OeXVPbXrsmVir2YaI039WN5gedz2vPSrupYJLMMEVGBvSpkbIjX8zJ1QWzI p3IRoPcf8dxWG/a3YM5+baiH89cWQ1LALEk91SN2dUZE0DivZyx36nwdW3VioRp/eW vO1AwEOp+7ZWg== From: Jiri Olsa To: Alexei Starovoitov , Daniel Borkmann Cc: bpf@vger.kernel.org, linux-mm@kvack.org, Andrii Nakryiko , Eduard Zingerman , Kumar Kartikeya Dwivedi , Lorenzo Stoakes , John Fastabend , Federico Di Pierro Subject: [PATCHv2 bpf-next 3/8] selftests/bpf: Add get_procmap_info helper Date: Tue, 3 Nov 2026 08:59:10 +0100 Message-ID: <20261103075916.100050-4-jolsa@kernel.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261103075916.100050-1-jolsa@kernel.org> References: <20261103075916.100050-1-jolsa@kernel.org> X-Mailing-List: bpf@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Adding get_procmap_info that queries the current process VMA range and permissions through PROCMAP_QUERY. Extend procmap_query to return the VMA end address and update its callers. I don't think we need the search fallback, the PROCMAP api is merged for some time now. Assisted-by: Codex:GPT-6 Signed-off-by: Jiri Olsa --- tools/testing/selftests/bpf/trace_helpers.c | 38 ++++++++++++++++++--- tools/testing/selftests/bpf/trace_helpers.h | 1 + 2 files changed, 34 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/bpf/trace_helpers.c b/tools/testing/selftests/bpf/trace_helpers.c index 6d7a4b8c4ab8..d2b2ff0ec2a4 100644 --- a/tools/testing/selftests/bpf/trace_helpers.c +++ b/tools/testing/selftests/bpf/trace_helpers.c @@ -286,7 +286,8 @@ unsigned long long module_get_base_addr_sec(const char *module, const char *sec) #ifdef PROCMAP_QUERY int env_verbosity __weak = 0; -static int procmap_query(int fd, const void *addr, __u32 query_flags, size_t *start, size_t *offset, int *flags) +static int procmap_query(int fd, const void *addr, __u32 query_flags, + size_t *start, size_t *end, size_t *offset, int *flags) { char path_buf[PATH_MAX], build_id_buf[20]; struct procmap_query q; @@ -325,6 +326,7 @@ static int procmap_query(int fd, const void *addr, __u32 query_flags, size_t *st } *start = q.vma_start; + *end = q.vma_end; *offset = q.vma_offset; *flags = q.vma_flags; return 0; @@ -333,13 +335,37 @@ static int procmap_query(int fd, const void *addr, __u32 query_flags, size_t *st # ifndef PROCMAP_QUERY_VMA_EXECUTABLE # define PROCMAP_QUERY_VMA_EXECUTABLE 0x04 # endif - -static int procmap_query(int fd, const void *addr, __u32 query_flags, size_t *start, size_t *offset, int *flags) +static int procmap_query(int fd, const void *addr, __u32 query_flags, + size_t *start, size_t *end, size_t *offset, int *flags) { return -EOPNOTSUPP; } #endif +int get_procmap_info(const void *addr, size_t *start, size_t *end, char perms[5]) +{ + FILE *f; + size_t offset; + int flags, err; + + f = fopen("/proc/self/maps", "r"); + if (!f) + return -errno; + + err = procmap_query(fileno(f), addr, 0, start, end, &offset, &flags); +#ifdef PROCMAP_QUERY + if (!err && perms) { + snprintf(perms, 5, "%c%c%c%c", + (flags & PROCMAP_QUERY_VMA_READABLE) ? 'r' : '-', + (flags & PROCMAP_QUERY_VMA_WRITABLE) ? 'w' : '-', + (flags & PROCMAP_QUERY_VMA_EXECUTABLE) ? 'x' : '-', + (flags & PROCMAP_QUERY_VMA_SHARED) ? 's' : 'p'); + } +#endif + fclose(f); + return err; +} + ssize_t get_uprobe_offset(const void *addr) { size_t start, base, end; @@ -352,7 +378,8 @@ ssize_t get_uprobe_offset(const void *addr) return -errno; /* requested executable VMA only */ - err = procmap_query(fileno(f), addr, PROCMAP_QUERY_VMA_EXECUTABLE, &start, &base, &flags); + err = procmap_query(fileno(f), addr, PROCMAP_QUERY_VMA_EXECUTABLE, + &start, &end, &base, &flags); if (err == -EOPNOTSUPP) { bool found = false; @@ -418,7 +445,8 @@ ssize_t get_rel_offset(uintptr_t addr) if (!f) return -errno; - err = procmap_query(fileno(f), (const void *)addr, 0, &start, &offset, &flags); + err = procmap_query(fileno(f), (const void *)addr, 0, + &start, &end, &offset, &flags); if (err == 0) { fclose(f); return (size_t)addr - start + offset; diff --git a/tools/testing/selftests/bpf/trace_helpers.h b/tools/testing/selftests/bpf/trace_helpers.h index 0f8d99746084..85b8f8e30232 100644 --- a/tools/testing/selftests/bpf/trace_helpers.h +++ b/tools/testing/selftests/bpf/trace_helpers.h @@ -59,6 +59,7 @@ int read_trace_pipe_iter(void (*cb)(const char *str, void *data), ssize_t get_uprobe_offset(const void *addr); ssize_t get_rel_offset(uintptr_t addr); +int get_procmap_info(const void *addr, size_t *start, size_t *end, char perms[5]); int read_build_id(const char *path, char *build_id, size_t size); -- 2.43.0