6430a94ead
perf buildid-cache --add <binary> scans given binary and add
the SDT events to probe cache. "sdt_" prefix is appended for
all SDT providers to avoid event-name clash with other pre-defined
events. It is possible to use the cached SDT events as other cached
events, via perf probe --add "sdt_<provider>:<event>=<event>".
e.g.
----
# perf buildid-cache --add /lib/libc-2.17.so
# perf probe --cache --list | head -n 5
/usr/lib/libc-2.17.so (a6fb821bdf53660eb2c29f778757aef294d3d392):
sdt_libc:setjmp=setjmp
sdt_libc:longjmp=longjmp
sdt_libc:longjmp_target=longjmp_target
sdt_libc:memory_heap_new=memory_heap_new
# perf probe -x /usr/lib/libc-2.17.so \
-a sdt_libc:memory_heap_new=memory_heap_new
Added new event:
sdt_libc:memory_heap_new (on memory_heap_new
in /usr/lib/libc-2.17.so)
You can now use it in all perf tools, such as:
perf record -e sdt_libc:memory_heap_new -aR sleep 1
# perf probe -l
sdt_libc:memory_heap_new (on new_heap+183 in /usr/lib/libc-2.17.so)
----
Note that SDT event entries in probe-cache file is somewhat different
from normal cached events. Normal one starts with "#", but SDTs are
starting with "%".
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Hemant Kumar <hemant@linux.vnet.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/146736025058.27797.13043265488541434502.stgit@devbox
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
#ifndef __PROBE_FILE_H
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#define __PROBE_FILE_H
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#include "strlist.h"
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#include "strfilter.h"
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#include "probe-event.h"
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/* Cache of probe definitions */
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struct probe_cache_entry {
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struct list_head node;
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bool sdt;
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struct perf_probe_event pev;
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char *spev;
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struct strlist *tevlist;
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};
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struct probe_cache {
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int fd;
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struct list_head entries;
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};
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#define PF_FL_UPROBE 1
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#define PF_FL_RW 2
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int probe_file__open(int flag);
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int probe_file__open_both(int *kfd, int *ufd, int flag);
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struct strlist *probe_file__get_namelist(int fd);
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struct strlist *probe_file__get_rawlist(int fd);
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int probe_file__add_event(int fd, struct probe_trace_event *tev);
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int probe_file__del_events(int fd, struct strfilter *filter);
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int probe_file__get_events(int fd, struct strfilter *filter,
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struct strlist *plist);
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int probe_file__del_strlist(int fd, struct strlist *namelist);
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struct probe_cache *probe_cache__new(const char *target);
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int probe_cache__add_entry(struct probe_cache *pcache,
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struct perf_probe_event *pev,
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struct probe_trace_event *tevs, int ntevs);
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int probe_cache__scan_sdt(struct probe_cache *pcache, const char *pathname);
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int probe_cache__commit(struct probe_cache *pcache);
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void probe_cache__purge(struct probe_cache *pcache);
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void probe_cache__delete(struct probe_cache *pcache);
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int probe_cache__filter_purge(struct probe_cache *pcache,
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struct strfilter *filter);
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struct probe_cache_entry *probe_cache__find(struct probe_cache *pcache,
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struct perf_probe_event *pev);
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struct probe_cache_entry *probe_cache__find_by_name(struct probe_cache *pcache,
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const char *group, const char *event);
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int probe_cache__show_all_caches(struct strfilter *filter);
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#endif
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