Mps br/padding: more diagnostic for how padding survives a collection.

More diag:
  - new traceSetSignalEmergency;
  - new AMCFix_amcSegCreateNailboard and AMCHeaderFix_amcSegCreateNailboard
    (note: the other, unreported, route to becoming boarded is because of a (mutator) buffer);
  - in traces: show SegBase and zone;
   - in TraceStart: show genZoneSets;
   - in amcReclaimNailed: show cbpip and cbpad.
 zcoll.c:
   - sizemethod 1 to Make command: occasionally makes >1MiB objects;
   - declare root_table all MPS_RANK_AMBIG.

Copied from Perforce
 Change: 167726
 ServerID: perforce.ravenbrook.com

1 files changed, 3 insertions, 0 deletions

diff --git a/mps/code/trace.c b/mps/code/trace.c
index 3958232dfec..1082eaefe78 100644
--- a/mps/code/trace.c
+++ b/mps/code/trace.c
@@ -308,6 +308,9 @@ static void traceSetSignalEmergency(TraceSet ts, Arena arena)
   TraceId ti;
   Trace trace;
 
+  DIAG_SINGLEF(( "traceSetSignalEmergency",
+    "traceSet: $B", ts, NULL ));
+
   TRACE_SET_ITER(ti, trace, ts, arena)
     trace->emergency = TRUE;
   TRACE_SET_ITER_END(ti, trace, ts, arena);