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perf trace beauty: Implement pid_fd beautifier

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One that given a pid and a fd, will try to get the path for that fd.
Will be used in the upcoming kcmp's KCMP_FILE beautifier.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andrey Vagin <avagin@openvz.org>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-7ketygp2dvs9h13wuakfncws@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2017-10-31 11:30:09 -03:00
parent 735e215e95
commit 0a2f7540ab
2 changed files with 20 additions and 0 deletions
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17
tools/perf/builtin-trace.c
View File

@ -988,6 +988,23 @@ size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg)
return printed;
}
size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size)
{
size_t printed = scnprintf(bf, size, "%d", fd);
struct thread *thread = machine__find_thread(trace->host, pid, pid);
if (thread) {
const char *path = thread__fd_path(thread, fd, trace);
if (path)
printed += scnprintf(bf + printed, size - printed, "<%s>", path);
thread__put(thread);
}
return printed;
}
static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size,
struct syscall_arg *arg)
{

3
tools/perf/trace/beauty/beauty.h
View File

@ -3,6 +3,7 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <sys/types.h>
struct strarray {
int offset;
@ -26,6 +27,8 @@ size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const cha
struct trace;
struct thread;
size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size);
/**
* @val: value of syscall argument being formatted
* @args: All the args, use syscall_args__val(arg, nth) to access one