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perf db-export: Add calls parent_id to enable creation of call trees

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The call_path can be used to find the parent symbol for a call but not
the exact parent call. To do that add parent_id to the call_return
export. This enables the creation of a call tree from the exported data.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: https://lkml.kernel.org/n/tip-6j7tzdxo67cox6kan7k22oo6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter
2019-02-28 15:00:24 +02:00
committed by Arnaldo Carvalho de Melo
parent 076333870c
commit f435887ec0
5 changed files with 35 additions and 13 deletions
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15
tools/perf/util/db-export.c
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@@ -510,18 +510,23 @@ int db_export__call_path(struct db_export *dbe, struct call_path *cp)
return 0;
}
int db_export__call_return(struct db_export *dbe, struct call_return *cr)
int db_export__call_return(struct db_export *dbe, struct call_return *cr,
u64 *parent_db_id)
{
int err;
if (cr->db_id)
return 0;
err = db_export__call_path(dbe, cr->cp);
if (err)
return err;
cr->db_id = ++dbe->call_return_last_db_id;
if (!cr->db_id)
cr->db_id = ++dbe->call_return_last_db_id;
if (parent_db_id) {
if (!*parent_db_id)
*parent_db_id = ++dbe->call_return_last_db_id;
cr->parent_db_id = *parent_db_id;
}
if (dbe->export_call_return)
return dbe->export_call_return(dbe, cr);