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=1793309187; b=XwMH22EP3M+IgqRa7hUfIu/vi4qrDwIYPaSDKGI8XynRld2KZFs/iaGgHe+ShfgPpsEB 4cr3qi9SSHZc3DMmMDQtov0V4Pz84c8rNKDO5GUtxxzjUiHJMNKZTmTc/8sFjAEiNzE0O tRErpYyRhgsDj6D8zgU+MyDiIML55zE6kq1CmHTddACk+2WiYTYpvlpWfvruibNAtSfDX SWDgi9TELN1ZJ0o8f2FgzANOIvYrqQGF71m18ElEghtq8mXCCgSwWcp6H8guzxqk+CDuk X/xk8R/nGgzWjL0mvlNMPI8zSoJu8A/1jMPE2TSF29dThC+TusmtKJqIXrCQEan1KsQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793309187; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=N9mCBJUUCqs6IT2F5T2oWyZqbwvi6Ucfb+HOwsiw6Ho=; b=QBlJnCKmlewy+lJvJHhEHkPJTVZZVURFXKuDU5Hzjwzjbu7QQOY8vceep/vaJ322JxnI CyhZGSADdnSsanLrUlpIhd4jYCYQv0ToQwQtRIz6V4KbR5ppHVbO7KMymKcGoNu/Y9LaE clFjX++9kj0oV1lSdk3aY+BL6F6/hSaThueN5o0jL2bhwug2jwkQ8Ty/WcMJ3LnLC+Zpb zA9OurHoio/JyYZnm925QdSEFjFPypVH13GDmpZQDWxyLVDkjxPDJVqhVsv9V9H1HOBE0 T0CsvupPT6jPlCLN/B6pLPDPijYrg1OvDHlyu4thiM+bwZqzTBZs9F8SGGM6fgJQA0g== 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="aeK2et/i"; 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 59061606A31A for ; Thu, 29 Oct 2026 21:26:27 +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=aeK2et/i Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0D4471F01816; Thu, 29 Oct 2026 21:26:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793309186; bh=N9mCBJUUCqs6IT2F5T2oWyZqbwvi6Ucfb+HOwsiw6Ho=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=aeK2et/ioxvUdQdQI8JkeqiV15qJC8AdzGa7lYdRlpe2+NjG0LieAd699w0CLASvl QzmbRNotAYc0wp4mLn6SpbwpXcT/uD3gy9/Gs+oFl0za96lCAZ/Q6TA9qFI+fuLua9 aBuKPBOh5jpPx0LkBeaUz3MpRh4dGOkZ/NnTSrFslgrU9Uh3kYnBuKcvFi2yJwG1TA Y27GoHTapanIpRQce38JH+qYs2ulBMK309Y5nb/IXLfkQpVXAS9ILaSVu7rnV/kDFa 5uSvDy4VZqiwLgekenCa6aaq25z/xNuy3rT/JHZagEhJySY/O3GTovibuBeLTfkJTx V6UvWlqo+FTzw== 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: [PATCH bpf-next 3/8] selftests/bpf: Add get_procmap_info helper Date: Thu, 29 Oct 2026 22:25:46 +0100 Message-ID: <20261029212551.56964-4-jolsa@kernel.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261029212551.56964-1-jolsa@kernel.org> References: <20261029212551.56964-1-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); -- 2.54.0