| Message ID | 1643645554-28723-4-git-send-email-alan.maguire@oracle.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Delegated to: | BPF |
| Headers | show |
| Series | libbpf: name-based u[ret]probe attach | expand |
| Context | Check | Description |
|---|---|---|
| bpf/vmtest-bpf-next-PR | fail | PR summary |
| netdev/tree_selection | success | Clearly marked for bpf-next |
| netdev/fixes_present | success | Fixes tag not required for -next series |
| netdev/subject_prefix | success | Link |
| netdev/cover_letter | success | Series has a cover letter |
| netdev/patch_count | success | Link |
| netdev/header_inline | success | No static functions without inline keyword in header files |
| netdev/build_32bit | success | Errors and warnings before: 0 this patch: 0 |
| netdev/cc_maintainers | warning | 2 maintainers not CCed: linux-kselftest@vger.kernel.org shuah@kernel.org |
| netdev/build_clang | success | Errors and warnings before: 0 this patch: 0 |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Signed-off-by tag matches author and committer |
| netdev/verify_fixes | success | No Fixes tag |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 0 this patch: 0 |
| netdev/checkpatch | warning | CHECK: Comparison to NULL could be written "!strstr" |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/source_inline | success | Was 0 now: 0 |
| bpf/vmtest-bpf-next | fail | VM_Test |
On Mon, Jan 31, 2022 at 8:13 AM Alan Maguire <alan.maguire@oracle.com> wrote: > > get_lib_path(path_substr) returns full path to a library > containing path_substr (such as "libc-") found via > /proc/self/maps. Caller is responsible for freeing > the returned string. > > Signed-off-by: Alan Maguire <alan.maguire@oracle.com> > --- > tools/testing/selftests/bpf/trace_helpers.c | 17 +++++++++++++++++ > tools/testing/selftests/bpf/trace_helpers.h | 2 ++ > 2 files changed, 19 insertions(+) > > diff --git a/tools/testing/selftests/bpf/trace_helpers.c b/tools/testing/selftests/bpf/trace_helpers.c > index ca6abae..49e5f0d 100644 > --- a/tools/testing/selftests/bpf/trace_helpers.c > +++ b/tools/testing/selftests/bpf/trace_helpers.c > @@ -216,3 +216,20 @@ ssize_t get_rel_offset(uintptr_t addr) > fclose(f); > return -EINVAL; > } > + > +char *get_lib_path(const char *path_substr) > +{ > + char *found = NULL; > + char lib_path[512]; > + FILE *f; > + > + f = fopen("/proc/self/maps", "r"); > + while (fscanf(f, "%*s %*s %*s %*s %*s %[^\n]", lib_path) == 1) { I think it can be followed by " (deleted)", right? Do we want to detect that and do something about it? > + if (strstr(lib_path, path_substr) == NULL) > + continue; > + found = strdup(lib_path); > + break; > + } > + fclose(f); > + return found; > +} > diff --git a/tools/testing/selftests/bpf/trace_helpers.h b/tools/testing/selftests/bpf/trace_helpers.h > index 238a9c9..ff379f6 100644 > --- a/tools/testing/selftests/bpf/trace_helpers.h > +++ b/tools/testing/selftests/bpf/trace_helpers.h > @@ -20,5 +20,7 @@ struct ksym { > > ssize_t get_uprobe_offset(const void *addr); > ssize_t get_rel_offset(uintptr_t addr); > +/* Return allocated string path to library that contains path_substr. */ > +char *get_lib_path(const char *path_substr); > > #endif > -- > 1.8.3.1 >
diff --git a/tools/testing/selftests/bpf/trace_helpers.c b/tools/testing/selftests/bpf/trace_helpers.c index ca6abae..49e5f0d 100644 --- a/tools/testing/selftests/bpf/trace_helpers.c +++ b/tools/testing/selftests/bpf/trace_helpers.c @@ -216,3 +216,20 @@ ssize_t get_rel_offset(uintptr_t addr) fclose(f); return -EINVAL; } + +char *get_lib_path(const char *path_substr) +{ + char *found = NULL; + char lib_path[512]; + FILE *f; + + f = fopen("/proc/self/maps", "r"); + while (fscanf(f, "%*s %*s %*s %*s %*s %[^\n]", lib_path) == 1) { + if (strstr(lib_path, path_substr) == NULL) + continue; + found = strdup(lib_path); + break; + } + fclose(f); + return found; +} diff --git a/tools/testing/selftests/bpf/trace_helpers.h b/tools/testing/selftests/bpf/trace_helpers.h index 238a9c9..ff379f6 100644 --- a/tools/testing/selftests/bpf/trace_helpers.h +++ b/tools/testing/selftests/bpf/trace_helpers.h @@ -20,5 +20,7 @@ struct ksym { ssize_t get_uprobe_offset(const void *addr); ssize_t get_rel_offset(uintptr_t addr); +/* Return allocated string path to library that contains path_substr. */ +char *get_lib_path(const char *path_substr); #endif
get_lib_path(path_substr) returns full path to a library containing path_substr (such as "libc-") found via /proc/self/maps. Caller is responsible for freeing the returned string. Signed-off-by: Alan Maguire <alan.maguire@oracle.com> --- tools/testing/selftests/bpf/trace_helpers.c | 17 +++++++++++++++++ tools/testing/selftests/bpf/trace_helpers.h | 2 ++ 2 files changed, 19 insertions(+)