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Edges, predictions, and GC crashes ...
- From: Ulrich Weigand <uweigand at de dot ibm dot com>
- To: gcc at gcc dot gnu dot org
- Date: Thu, 2 Jun 2005 18:59:36 +0200 (CEST)
- Subject: Edges, predictions, and GC crashes ...
Hello,
I'm seeing compiler crashes during garbage collection when using mudflap.
The problem appears to be that some basic_block_def structures point to
edge_prediction structures which point to edge_def structures that have
already been ggc_free()'d.
Now, looking at remove_edge (cfg.c) is does indeed appear that it is
possible for edges to get deleted without the corresponding prediction
structure being removed as well ...
How is this supposed to work?
Bye,
Ulrich
--
Dr. Ulrich Weigand
Linux on zSeries Development
Ulrich.Weigand@de.ibm.com