How to force gcc to blackhole registers so that things maybe garbage collected?

[Hamad Ahmed]

How do I do that?

Hamad

> On May 18, 2019, at 15:24, Andrew Haley <aph@redhat.com> wrote:
> 
>> On 5/17/19 4:04 PM, Andrew Haley wrote:
>> Its not the collector’s imprecision that’s the problem here. Boehm
>> GC is conservative i.e.  if an integer in the memory looks like a
>> pointer to memory then that memory is leaked. The problem here is
>> that gcc leaves dead pointers in registers and doesn’t overwrite
>> them if there isn’t a lot of register pressure.
> 
> I have a suggestion: try writing a function in assembly language that
> clears all call-clobbered registers. I reckon this will solve 75% of
> your problem.
> 
> -- 
> Andrew Haley
> Java Platform Lead Engineer
> Red Hat UK Ltd. <https://www.redhat.com>
> https://keybase.io/andrewhaley
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