fprof: update to work with new spawned trace event

OTP-13499

1 files changed, 12 insertions, 3 deletions

diff --git a/lib/tools/src/fprof.erl b/lib/tools/src/fprof.erl
index c5c24c8eb3..f9da748fef 100644
--- a/lib/tools/src/fprof.erl
+++ b/lib/tools/src/fprof.erl
@@ -1567,13 +1567,20 @@ trace_handler({trace_ts, Pid, return_to, {_M, _F, Args} = MFArgs, TS} = Trace,
     trace_return_to(Table, Pid, Func, TS),
     TS;
 %%
-%% spawn
+%% spawn, only needed (and reliable) prior to 19.0
 trace_handler({trace_ts, Pid, spawn, Child, MFArgs, TS} = Trace,
 	      Table, _, Dump) ->
     dump_stack(Dump, get(Pid), Trace),
     trace_spawn(Table, Child, MFArgs, TS, Pid),
     TS;
 %%
+%% spawned, added in 19.0
+trace_handler({trace_ts, Pid, spawned, Parent, MFArgs, TS} = Trace,
+	      Table, _, Dump) ->
+    dump_stack(Dump, get(Pid), Trace),
+    trace_spawn(Table, Pid, MFArgs, TS, Parent),
+    TS;
+%%
 %% exit
 trace_handler({trace_ts, Pid, exit, _Reason, TS} = Trace,
 	      Table, _, Dump) ->
@@ -2014,8 +2021,10 @@ trace_spawn(Table, Pid, MFArgs, TS, Parent) ->
 	    ets:insert(Table, #proc{id = Pid, parent = Parent,
 				    spawned_as = MFArgs});
 	_ ->
-	    throw({inconsistent_trace_data, ?MODULE, ?LINE,
-		  [Pid, MFArgs, TS, Parent, Stack]})
+            %% In 19.0 we get both a spawn and spawned event,
+            %% however we do not know the order so we just ignore
+            %% the second event that comes
+	    ok
     end.