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perf probe: Support distro-style debuginfo for uprobe

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Support distro-style debuginfo supported by dso for setting uprobes.
Note that this tries to find a debuginfo file based on the real path of
the target binary. If the debuginfo is not correctly installed on the
system, this can not find it.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: "David A. Long" <dave.long@linaro.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20140206053227.29635.54434.stgit@kbuild-fedora.yrl.intra.hitachi.co.jp
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Masami Hiramatsu 2014-02-06 05:32:27 +00:00 committed by Arnaldo Carvalho de Melo
parent eb948e5083
commit a15ad2f536
3 changed files with 43 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
tools/perf/util/probe-event.c
View File

@ -256,17 +256,14 @@ static void clear_probe_trace_events(struct probe_trace_event *tevs, int ntevs)
}
#ifdef HAVE_DWARF_SUPPORT
/* Open new debuginfo of given module */
static struct debuginfo *open_debuginfo(const char *module)
{
const char *path;
const char *path = module;
/* A file path -- this is an offline module */
if (module && strchr(module, '/'))
path = module;
else {
if (!module || !strchr(module, '/')) {
path = kernel_get_module_path(module);
if (!path) {
pr_err("Failed to find path of %s module.\n",
module ?: "kernel");

41
tools/perf/util/probe-finder.c
View File

@ -34,6 +34,7 @@
#include <linux/bitops.h>
#include "event.h"
#include "dso.h"
#include "debug.h"
#include "intlist.h"
#include "util.h"
@ -89,7 +90,7 @@ error:
return -ENOENT;
}
struct debuginfo *debuginfo__new(const char *path)
static struct debuginfo *__debuginfo__new(const char *path)
{
struct debuginfo *dbg = zalloc(sizeof(*dbg));
if (!dbg)
@ -97,10 +98,46 @@ struct debuginfo *debuginfo__new(const char *path)
if (debuginfo__init_offline_dwarf(dbg, path) < 0)
zfree(&dbg);
if (dbg)
pr_debug("Open Debuginfo file: %s\n", path);
return dbg;
}
enum dso_binary_type distro_dwarf_types[] = {
DSO_BINARY_TYPE__FEDORA_DEBUGINFO,
DSO_BINARY_TYPE__UBUNTU_DEBUGINFO,
DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO,
DSO_BINARY_TYPE__BUILDID_DEBUGINFO,
DSO_BINARY_TYPE__NOT_FOUND,
};
struct debuginfo *debuginfo__new(const char *path)
{
enum dso_binary_type *type;
char buf[PATH_MAX], nil = '\0';
struct dso *dso;
struct debuginfo *dinfo = NULL;
/* Try to open distro debuginfo files */
dso = dso__new(path);
if (!dso)
goto out;
for (type = distro_dwarf_types;
!dinfo && *type != DSO_BINARY_TYPE__NOT_FOUND;
type++) {
if (dso__read_binary_type_filename(dso, *type, &nil,
buf, PATH_MAX) < 0)
continue;
dinfo = __debuginfo__new(buf);
}
dso__delete(dso);
out:
/* if failed to open all distro debuginfo, open given binary */
return dinfo ? : __debuginfo__new(path);
}
void debuginfo__delete(struct debuginfo *dbg)
{
if (dbg) {

1
tools/perf/util/probe-finder.h
View File

@ -30,6 +30,7 @@ struct debuginfo {
Dwarf_Addr bias;
};
/* This also tries to open distro debuginfo */
extern struct debuginfo *debuginfo__new(const char *path);
extern void debuginfo__delete(struct debuginfo *dbg);