mirror of
https://github.com/torvalds/linux.git
synced 2024-12-07 19:41:31 +00:00
843ff37bb5
Teach perf how to resolve symbols from binaries that are in a different mount namespace from the tool. This allows perf to generate meaningful stack traces even if the binary resides in a different mount namespace from the tool. Signed-off-by: Krister Johansen <kjlx@templeofstupid.com> Tested-by: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/1499305693-1599-2-git-send-email-kjlx@templeofstupid.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License, version 2, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Copyright (C) 2017 Hari Bathini, IBM Corporation
|
|
*/
|
|
|
|
#ifndef __PERF_NAMESPACES_H
|
|
#define __PERF_NAMESPACES_H
|
|
|
|
#include "../perf.h"
|
|
#include <linux/list.h>
|
|
#include <linux/refcount.h>
|
|
|
|
struct namespaces_event;
|
|
|
|
struct namespaces {
|
|
struct list_head list;
|
|
u64 end_time;
|
|
struct perf_ns_link_info link_info[];
|
|
};
|
|
|
|
struct namespaces *namespaces__new(struct namespaces_event *event);
|
|
void namespaces__free(struct namespaces *namespaces);
|
|
|
|
struct nsinfo {
|
|
pid_t pid;
|
|
bool need_setns;
|
|
char *mntns_path;
|
|
refcount_t refcnt;
|
|
};
|
|
|
|
struct nscookie {
|
|
int oldns;
|
|
int newns;
|
|
};
|
|
|
|
void nsinfo__init(struct nsinfo *nsi);
|
|
struct nsinfo *nsinfo__new(pid_t pid);
|
|
void nsinfo__delete(struct nsinfo *nsi);
|
|
|
|
struct nsinfo *nsinfo__get(struct nsinfo *nsi);
|
|
void nsinfo__put(struct nsinfo *nsi);
|
|
|
|
void nsinfo__mountns_enter(struct nsinfo *nsi, struct nscookie *nc);
|
|
void nsinfo__mountns_exit(struct nscookie *nc);
|
|
|
|
static inline void __nsinfo__zput(struct nsinfo **nsip)
|
|
{
|
|
if (nsip) {
|
|
nsinfo__put(*nsip);
|
|
*nsip = NULL;
|
|
}
|
|
}
|
|
|
|
#define nsinfo__zput(nsi) __nsinfo__zput(&nsi)
|
|
|
|
#endif /* __PERF_NAMESPACES_H */
|