diff options
| -rw-r--r-- | tools/perf/builtin-probe.c | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c index 0584b7a..6b0e4cf 100644 --- a/tools/perf/builtin-probe.c +++ b/tools/perf/builtin-probe.c @@ -59,6 +59,7 @@ static struct { struct strlist *dellist; struct symbol_conf conf; struct perf_session *psession; + struct map *kmap; } session; @@ -115,22 +116,26 @@ static int opt_del_probe_event(const struct option *opt __used, return 0; } +/* Currently just checking function name from symbol map */ +static void evaluate_probe_point(struct probe_point *pp) +{ + struct symbol *sym; + sym = map__find_symbol_by_name(session.kmap, pp->function, + session.psession, NULL); + if (!sym) + die("Kernel symbol \'%s\' not found - probe not added.", + pp->function); +} + #ifndef NO_LIBDWARF static int open_vmlinux(void) { - struct map *kmap; - kmap = map_groups__find_by_name(&session.psession->kmaps, - MAP__FUNCTION, "[kernel.kallsyms]"); - if (!kmap) { - pr_debug("Could not find kernel map.\n"); - return -ENOENT; - } - if (map__load(kmap, session.psession, NULL) < 0) { + if (map__load(session.kmap, session.psession, NULL) < 0) { pr_debug("Failed to load kernel map.\n"); return -EINVAL; } - pr_debug("Try to open %s\n", kmap->dso->long_name); - return open(kmap->dso->long_name, O_RDONLY); + pr_debug("Try to open %s\n", session.kmap->dso->long_name); + return open(session.kmap->dso->long_name, O_RDONLY); } #endif @@ -219,6 +224,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) } /* Initialize symbol maps for vmlinux */ + session.conf.sort_by_name = true; if (session.conf.vmlinux_name == NULL) session.conf.try_vmlinux_path = true; if (symbol__init(&session.conf) < 0) @@ -227,6 +233,11 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used) &session.conf); if (session.psession == NULL) die("Failed to init perf_session."); + session.kmap = map_groups__find_by_name(&session.psession->kmaps, + MAP__FUNCTION, + "[kernel.kallsyms]"); + if (!session.kmap) + die("Could not find kernel map.\n"); if (session.need_dwarf) #ifdef NO_LIBDWARF @@ -277,6 +288,7 @@ end_dwarf: if (pp->found) /* This probe is already found. */ continue; + evaluate_probe_point(pp); ret = synthesize_trace_kprobe_event(pp); if (ret == -E2BIG) die("probe point definition becomes too long."); |