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authorArnaldo Carvalho de Melo <acme@redhat.com>2015-08-14 13:16:27 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-08-14 13:16:27 -0300
commit7f4f800131a281a1e1738c0bc45659c1260dc96a (patch)
treec147a2f702b590ada518b33a19fff30482116c83 /tools/perf/builtin-trace.c
parent86a76027457633488b0a83d5e2bb944159885605 (diff)
downloadlinux-7f4f800131a281a1e1738c0bc45659c1260dc96a.tar.gz
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>
Diffstat (limited to 'tools/perf/builtin-trace.c')
-rw-r--r--tools/perf/builtin-trace.c38
1 files changed, 27 insertions, 11 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 489cc118a36a..2f1162daa3c5 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -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;