[Lldb-commits] [PATCH] Fixes for 32-bit linux ptrace and RegisterContext issues

Matthew Gardiner mg11 at csr.com
Thu Feb 27 22:31:20 PST 2014

Todd Fiala wrote:
> > +        case eTypeUInt64:   return m_data.uint32;
> On the surface this line looks a little suspect but I need to see it in context.
Agreed. It's not a really good fix. And it probably breaks a design goal in the RegisterValue. My motivation for making the change was merely that the initialization "zero_bits" writes to dr6/7 of 
IsWatchpointHit/Vacant were assigned as 64 bits, as in:

RegisterValue zero_bits = RegisterValue(uint64_t(0));

but in the business end (ProcessMonitor)

#if __WORDSIZE == 32
     buf = (void*) m_value.GetAsUInt32();
     buf = (void*) m_value.GetAsUInt64();

these returned as ffffffff (fail_value) due (what I perceive to be) the design goal of RegisterValue (i.e. that switch/case statement).

Better fix is possibly somewhere in RegisterContextPOSIXProcessMonitor?

Anyway, I'll look at the r202428 and see if the issue persists.


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