luciano@canuck.Berkeley.EDU (Luciano Lavagno) (02/26/91)
I noticed that ptrace (ULTRIX V4.1, DEC3100 RISC) now seems to support watchpoints: (1) are such watchpoints implemented efficiently (i.e. through memory protection/fault handling) ? (2) if the answer to (1) is yes, then is there any debugger taking advantage of it ? dbx 2.0 simply chokes on stop <variable> (with a "DBX Fault: Segmentation fault"), while dbx 2.10.1 (from a field test ULTRIX T4.2) uses the old "single stepping" method. Thanks ! Luciano -- +--------------------------+------------------------------------+ |Luciano Lavagno | E-mail: luciano@ic.Berkeley.EDU | |Dept of EECS, Rm. 550-B2 | | |UC Berkeley | Phone: (415) 642-5012 | |Berkeley, CA 94720 (USA) | | +--------------------------+------------------------------------+