Hi Ben, I didn't have a chance to debug the scripts yet, but just in case you missed my last email with examples of repeatable blocks and sequences - do you think we still need to analyze further, will the scripts tell more about the heap?
Thanks, Oleg On Thu, Feb 28, 2019 at 10:14 PM Ben Pfaff <b...@ovn.org> wrote: > On Tue, Feb 26, 2019 at 01:41:45PM +0400, Oleg Bondarev wrote: > > Hi, > > > > thanks for the scripts, so here's the output for a 24G core dump: > > https://pastebin.com/hWa3R9Fx > > there's 271 entries of 4MB - does it seem something we should take a > closer > > look at? > > I think that this output really just indicates that the script failed. > It analyzed a lot of regions but didn't output anything useful. If it > had worked properly, it would have told us a lot about data blocks that > had been allocated and freed. > > The next step would have to be to debug the script. It definitely > worked for me before, because I have fixed at least 3 or 4 bugs based on > it, but it also definitely is a quick hack and not something that I can > stand behind. I'm not sure how to debug it at a distance. It has a > large comment that describes what it's trying to do. Maybe that would > help you, if you want to try to debug it yourself. I guess it's also > possible that glibc has changed its malloc implementation; if so, then > it would probably be necessary to start over and build a new script. >
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