[Bug go/60931] New: libgo has issues when page size is not 4k

anton at samba dot org gcc-bugzilla@gcc.gnu.org
Wed Apr 23 07:06:00 GMT 2014


            Bug ID: 60931
           Summary: libgo has issues when page size is not 4k
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: go
          Assignee: ian at airs dot com
          Reporter: anton at samba dot org

Created attachment 32659
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=32659&action=edit
Bump page size to 64kB

We are seeing random failures with go programs on a 64kB page size ppc64 box.
It looks like garbage collection issues - sometimes we SEGV in timer code,
sometimes we SEGV in the code that wraps a kernel read syscall. If I prevent
the garbage collector from running, the programs work.

The libgo malloc hard codes the page size so I wrote a quick hack to bump this
(and a few other dependent variables). This makes the problem go away, but we
will need to come up with a better way to do this at runtime.

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