summaryrefslogtreecommitdiff
path: root/tools
diff options
context:
space:
mode:
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/dso.c15
-rw-r--r--tools/perf/util/dsos.c13
-rw-r--r--tools/perf/util/symbol.c10
-rw-r--r--tools/perf/util/util.c31
-rw-r--r--tools/perf/util/util.h2
5 files changed, 69 insertions, 2 deletions
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 9cc8a1772b4b..5ac13958d1bd 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -508,8 +508,19 @@ static int __open_dso(struct dso *dso, struct machine *machine)
root_dir, name, PATH_MAX))
goto out;
- if (!is_regular_file(name))
- goto out;
+ if (!is_regular_file(name)) {
+ char *new_name;
+
+ if (errno != ENOENT || dso->nsinfo == NULL)
+ goto out;
+
+ new_name = filename_with_chroot(dso->nsinfo->pid, name);
+ if (!new_name)
+ goto out;
+
+ free(name);
+ name = new_name;
+ }
if (dso__needs_decompress(dso)) {
char newpath[KMOD_DECOMP_LEN];
diff --git a/tools/perf/util/dsos.c b/tools/perf/util/dsos.c
index 183a81d5b2f9..b97366f77bbf 100644
--- a/tools/perf/util/dsos.c
+++ b/tools/perf/util/dsos.c
@@ -2,12 +2,15 @@
#include "debug.h"
#include "dsos.h"
#include "dso.h"
+#include "util.h"
#include "vdso.h"
#include "namespaces.h"
+#include <errno.h>
#include <libgen.h>
#include <stdlib.h>
#include <string.h>
#include <symbol.h> // filename__read_build_id
+#include <unistd.h>
static int __dso_id__cmp(struct dso_id *a, struct dso_id *b)
{
@@ -76,6 +79,16 @@ bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
if (filename__read_build_id(pos->long_name, &pos->bid) > 0) {
have_build_id = true;
pos->has_build_id = true;
+ } else if (errno == ENOENT && pos->nsinfo) {
+ char *new_name = filename_with_chroot(pos->nsinfo->pid,
+ pos->long_name);
+
+ if (new_name && filename__read_build_id(new_name,
+ &pos->bid) > 0) {
+ have_build_id = true;
+ pos->has_build_id = true;
+ }
+ free(new_name);
}
nsinfo__mountns_exit(&nsc);
}
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index b2ed3140a1fa..34302c61d36b 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1864,6 +1864,16 @@ int dso__load(struct dso *dso, struct map *map)
nsinfo__mountns_exit(&nsc);
is_reg = is_regular_file(name);
+ if (!is_reg && errno == ENOENT && dso->nsinfo) {
+ char *new_name = filename_with_chroot(dso->nsinfo->pid,
+ name);
+ if (new_name) {
+ is_reg = is_regular_file(new_name);
+ strlcpy(name, new_name, PATH_MAX);
+ free(new_name);
+ }
+ }
+
#ifdef HAVE_LIBBFD_SUPPORT
if (is_reg)
bfdrc = dso__load_bfd_symbols(dso, name);
diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
index fb4f6616b5fa..f8571a66d063 100644
--- a/tools/perf/util/util.c
+++ b/tools/perf/util/util.c
@@ -431,3 +431,34 @@ void perf_debuginfod_setup(struct perf_debuginfod *di)
pr_debug("DEBUGINFOD_URLS=%s\n", getenv("DEBUGINFOD_URLS"));
}
+
+/*
+ * Return a new filename prepended with task's root directory if it's in
+ * a chroot. Callers should free the returned string.
+ */
+char *filename_with_chroot(int pid, const char *filename)
+{
+ char buf[PATH_MAX];
+ char proc_root[32];
+ char *new_name = NULL;
+ int ret;
+
+ scnprintf(proc_root, sizeof(proc_root), "/proc/%d/root", pid);
+ ret = readlink(proc_root, buf, sizeof(buf) - 1);
+ if (ret <= 0)
+ return NULL;
+
+ /* readlink(2) does not append a null byte to buf */
+ buf[ret] = '\0';
+
+ if (!strcmp(buf, "/"))
+ return NULL;
+
+ if (strstr(buf, "(deleted)"))
+ return NULL;
+
+ if (asprintf(&new_name, "%s/%s", buf, filename) < 0)
+ return NULL;
+
+ return new_name;
+}
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index 7b625cbd2dd8..0f78f1e7782d 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -77,4 +77,6 @@ struct perf_debuginfod {
bool set;
};
void perf_debuginfod_setup(struct perf_debuginfod *di);
+
+char *filename_with_chroot(int pid, const char *filename);
#endif /* GIT_COMPAT_UTIL_H */