perf probe: Fix use of kernel image path given by 'k' option

Users were not being able to have the explicitely specified vmlinux
pathname used, instead a search on the vmlinux path was always being
made.

Reported-by: Francis Moreau <francis.moro@gmail.com>
Acked-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: 2nddept-manager@sdl.hitachi.co.jp
Cc: Francis Moreau <francis.moro@gmail.com>
Cc: Franck Bui-Huu <vagabon.xyz@gmail.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
LPU-Reference: <m3hbelydz8.fsf_-_@gmail.com>
Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 2e000c0..add163c 100644 (file)
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -249,6 +249,11 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
             !params.show_lines))
                usage_with_options(probe_usage, options);
 
+       /*
+        * Only consider the user's kernel image path if given.
+        */
+       symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
+
        if (params.list_events) {
                if (params.mod_events) {
                        pr_err("  Error: Don't use --list with --add/--del.\n");

diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 3b6a529..b71acd6 100644 (file)
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -114,6 +114,8 @@ static struct symbol *__find_kernel_function_by_name(const char *name,
 const char *kernel_get_module_path(const char *module)
 {
        struct dso *dso;
+       struct map *map;
+       const char *vmlinux_name;
 
        if (module) {
                list_for_each_entry(dso, &machine.kernel_dsos, node) {
@@ -123,10 +125,17 @@ const char *kernel_get_module_path(const char *module)
                }
                pr_debug("Failed to find module %s.\n", module);
                return NULL;
+       }
+
+       map = machine.vmlinux_maps[MAP__FUNCTION];
+       dso = map->dso;
+
+       vmlinux_name = symbol_conf.vmlinux_name;
+       if (vmlinux_name) {
+               if (dso__load_vmlinux(dso, map, vmlinux_name, NULL) <= 0)
+                       return NULL;
        } else {
-               dso = machine.vmlinux_maps[MAP__FUNCTION]->dso;
-               if (dso__load_vmlinux_path(dso,
-                        machine.vmlinux_maps[MAP__FUNCTION], NULL) < 0) {
+               if (dso__load_vmlinux_path(dso, map, NULL) < 0) {
                        pr_debug("Failed to load kernel map.\n");
                        return NULL;
                }

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index d628c8d..439ab94 100644 (file)
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1780,8 +1780,8 @@ out_failure:
        return -1;
 }
 
-static int dso__load_vmlinux(struct dso *self, struct map *map,
-                            const char *vmlinux, symbol_filter_t filter)
+int dso__load_vmlinux(struct dso *self, struct map *map,
+                     const char *vmlinux, symbol_filter_t filter)
 {
        int err = -1, fd;
 

diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 038f220..6c6eafd 100644 (file)
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -166,6 +166,8 @@ void dso__sort_by_name(struct dso *self, enum map_type type);
 struct dso *__dsos__findnew(struct list_head *head, const char *name);
 
 int dso__load(struct dso *self, struct map *map, symbol_filter_t filter);
+int dso__load_vmlinux(struct dso *self, struct map *map,
+                     const char *vmlinux, symbol_filter_t filter);
 int dso__load_vmlinux_path(struct dso *self, struct map *map,
                           symbol_filter_t filter);
 int dso__load_kallsyms(struct dso *self, const char *filename, struct map *map,