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perf trace: Move vfs_getname storage to per thread area 

We were storing the vfs_getname payload (i.e. ptr->string) into
the trace wide storage area (struct trace), so that we could use the
last payload when setting up the fd->pathname per thread tables, oops,
not a good idea for multi cpu tracing sessions...

Fix it by moving it to the per thread area (struct thread_trace).

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-3j05ttqyaem7kh7oubvr1keo@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2015-08-14 13:16:27 -03:00
parent 86a7602745
commit 7f4f800131
1 changed files with 27 additions and 11 deletions
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38
tools/perf/builtin-trace.c
View File

@ -1315,7 +1315,10 @@ struct thread_trace {
double runtime_ms;
struct {
unsigned long ptr;
int entry_str_pos;
short int entry_str_pos;
bool pending_open;
unsigned int namelen;
char *name;
} filename;
struct {
int max;
@ -1391,7 +1394,6 @@ struct trace {
size_t nr;
int *entries;
} ev_qualifier_ids;
const char *last_vfs_getname;
struct intlist *tid_list;
struct intlist *pid_list;
struct {
@ -1966,8 +1968,11 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
trace__fprintf_entry_head(trace, thread, 1, sample->time, trace->output);
fprintf(trace->output, "%-70s\n", ttrace->entry_str);
}
} else
} else {
ttrace->entry_pending = true;
/* See trace__vfs_getname & trace__sys_exit */
ttrace->filename.pending_open = false;
}
if (trace->current != thread) {
thread__put(trace->current);
@ -2003,9 +2008,9 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
ret = perf_evsel__sc_tp_uint(evsel, ret, sample);
if (id == trace->audit.open_id && ret >= 0 && trace->last_vfs_getname) {
trace__set_fd_pathname(thread, ret, trace->last_vfs_getname);
trace->last_vfs_getname = NULL;
if (id == trace->audit.open_id && ret >= 0 && ttrace->filename.pending_open) {
trace__set_fd_pathname(thread, ret, ttrace->filename.name);
ttrace->filename.pending_open = false;
++trace->stats.vfs_getname;
}
@ -2065,9 +2070,7 @@ static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel,
size_t filename_len, entry_str_len, to_move;
ssize_t remaining_space;
char *pos;
const char *filename;
trace->last_vfs_getname = perf_evsel__rawptr(evsel, sample, "pathname");
const char *filename = perf_evsel__rawptr(evsel, sample, "pathname");
if (!thread)
goto out;
@ -2076,6 +2079,21 @@ static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel,
if (!ttrace)
goto out;
filename_len = strlen(filename);
if (ttrace->filename.namelen < filename_len) {
char *f = realloc(ttrace->filename.name, filename_len + 1);
if (f == NULL)
goto out;
ttrace->filename.namelen = filename_len;
ttrace->filename.name = f;
}
strcpy(ttrace->filename.name, filename);
ttrace->filename.pending_open = true;
if (!ttrace->filename.ptr)
goto out;
@ -2084,8 +2102,6 @@ static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel,
if (remaining_space <= 0)
goto out;
filename = trace->last_vfs_getname;
filename_len = strlen(filename);
if (filename_len > (size_t)remaining_space) {
filename += filename_len - remaining_space;
filename_len = remaining_space;