alchss problem

["Steve Richter" <srichter@xxxxxxxxxxxxx>]

I have a bug in some code that uses ALCHSS.

 

One pgm uses ALCHSS to allocate entries for a linked list, later on another pgm reads the list entries and is randomly receiving some bad data.  So far 8 hours into the bug hunt and no sign of a culprit.

 

I allocate from the default heap space. The ALCHSS stmt looks like this:

    ALCHSS pData, 0, nSize ;

 

Any known or suspected problems with ALCHSS?

 

The MI manual says the "creation size advisory is 4KB". Most of the allocations I do are much smaller than that (although the ones with the bug are little less than 4096). Any ideas on why the advisory?

 

Any reason to think that ALCHSS is not rock solid? I would guess that ile uses it extensively.

 

A debugger feature plea:  When in debug mode, provide an "AddAddrBkp" cmd. When an address range is referenced in the job being debugged, call a debug handler pgm.  Similar to the action of the breakpoint handing pgm that is called when an instruction is executed.

 

Thanks,

 

Steve Richter