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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-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: B009980002 X-Stat-Signature: 4yz3fhmpna1bm47iordnm1s8xq78j4s7 X-Rspam-User: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-HE-Tag: 1793309187-837029 X-HE-Meta: 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 /cmK+O+4 19DO59G0ZvDy0tA7q5U/v5gDPbjjLemdwrBsbfL2qPbPNU+zHn/gHS5kpHrUtXS0mSY+Y7jqPYQbSAG9axGC67uEGBXIZkWn4o5+ZnZ1VgXYATYI6ySaxJa1uVfy7/s9zSLVPk76jhLdIZko4rcnKVUvjhJ5JqfqugRZgfIKMGv7lDSH47Lkclj8cHyCWE/bokBLLPdgR2z0jMysyyePrg4GwPlok6FvzzC/TyNtNW4ikiZS/JWwSMNR8dSXTzCFc4qTh+xRWZZrwwCASU5q5iXgxiY03SpeXtRp0xMChCJOPo3Rhl3WuOeB0+pbd+JWse6ThupLuAUbCxHHkJgCFQzlVQRJA6hEeo0p//IoG6GhWCCs= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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