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-rw-r--r--tools/perf/Documentation/perf-probe.txt6
-rw-r--r--tools/perf/builtin-probe.c3
-rw-r--r--tools/perf/util/probe-event.c52
3 files changed, 49 insertions, 12 deletions
diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index 02bafce4b341..2780d9ce48bf 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -34,9 +34,11 @@ OPTIONS
Specify vmlinux path which has debuginfo (Dwarf binary).
-m::
---module=MODNAME::
+--module=MODNAME|PATH::
Specify module name in which perf-probe searches probe points
- or lines.
+ or lines. If a path of module file is passed, perf-probe
+ treat it as an offline module (this means you can add a probe on
+ a module which has not been loaded yet).
-s::
--source=PATH::
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 2c0e64d0b4aa..5f2a5c7046df 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -242,7 +242,8 @@ static const struct option options[] = {
OPT_STRING('s', "source", &symbol_conf.source_prefix,
"directory", "path to kernel source"),
OPT_STRING('m', "module", &params.target_module,
- "modname", "target module name"),
+ "modname|path",
+ "target module name (for online) or path (for offline)"),
#endif
OPT__DRY_RUN(&probe_event_dry_run),
OPT_INTEGER('\0', "max-probes", &params.max_probe_points,
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index ee3f41eec5c1..b82d54fa2c56 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -117,6 +117,10 @@ static struct map *kernel_get_module_map(const char *module)
struct rb_node *nd;
struct map_groups *grp = &machine.kmaps;
+ /* A file path -- this is an offline module */
+ if (module && strchr(module, '/'))
+ return machine__new_module(&machine, 0, module);
+
if (!module)
module = "kernel";
@@ -173,12 +177,19 @@ const char *kernel_get_module_path(const char *module)
/* Open new debuginfo of given module */
static struct debuginfo *open_debuginfo(const char *module)
{
- const char *path = kernel_get_module_path(module);
+ const char *path;
- if (!path) {
- pr_err("Failed to find path of %s module.\n",
- module ?: "kernel");
- return NULL;
+ /* A file path -- this is an offline module */
+ if (module && strchr(module, '/'))
+ path = module;
+ else {
+ path = kernel_get_module_path(module);
+
+ if (!path) {
+ pr_err("Failed to find path of %s module.\n",
+ module ?: "kernel");
+ return NULL;
+ }
}
return debuginfo__new(path);
}
@@ -229,13 +240,36 @@ static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
static int add_module_to_probe_trace_events(struct probe_trace_event *tevs,
int ntevs, const char *module)
{
- int i;
+ int i, ret = 0;
+ char *tmp;
+
+ if (!module)
+ return 0;
+
+ tmp = strrchr(module, '/');
+ if (tmp) {
+ /* This is a module path -- get the module name */
+ module = strdup(tmp + 1);
+ if (!module)
+ return -ENOMEM;
+ tmp = strchr(module, '.');
+ if (tmp)
+ *tmp = '\0';
+ tmp = (char *)module; /* For free() */
+ }
+
for (i = 0; i < ntevs; i++) {
tevs[i].point.module = strdup(module);
- if (!tevs[i].point.module)
- return -ENOMEM;
+ if (!tevs[i].point.module) {
+ ret = -ENOMEM;
+ break;
+ }
}
- return 0;
+
+ if (tmp)
+ free(tmp);
+
+ return ret;
}
/* Try to find perf_probe_event with debuginfo */