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Annotation of embedaddon/ntp/ElectricFence/README, revision 1.1.1.1

1.1       misho       1: This is Electric Fence 2.0.5
                      2: 
                      3: Electric Fence is a different kind of malloc() debugger. It uses the virtual
                      4: memory hardware of your system to detect when software overruns the boundaries
                      5: of a malloc() buffer. It will also detect any accesses of memory that has
                      6: been released by free(). Because it uses the VM hardware for detection,
                      7: Electric Fence stops your program on the first instruction that causes
                      8: a bounds violation. It's then trivial to use a debugger to display the
                      9: offending statement.
                     10: 
                     11: This version will run on:
                     12:        Linux kernel version 1.1.83 and above. Earlier kernels have problems
                     13:        with the memory protection implementation.
                     14: 
                     15:        All System V Revision 4 platforms (and possibly earlier revisions)
                     16:        including:
                     17:                Every 386 System V I've heard of.
                     18:                Solaris 2.x
                     19:                SGI IRIX 5.0 (but not 4.x)
                     20: 
                     21:        IBM AIX on the RS/6000.
                     22: 
                     23:        SunOS 4.X (using an ANSI C compiler and probably static linking).
                     24: 
                     25:        HP/UX 9.01, and possibly earlier versions.
                     26: 
                     27:        OSF 1.3 (and possibly earlier versions) on a DECalpha.
                     28: 
                     29: On some of these platforms, you'll have to uncomment lines in the Makefile
                     30: that apply to your particular system.
                     31: 
                     32: If you test Electric Fence on a platform not mentioned here, please send me a
                     33: report.
                     34: 
                     35: It will probably port to any ANSI/POSIX system that provides mmap(), and
                     36: mprotect(), as long as mprotect() has the capability to turn off all access
                     37: to a memory page, and mmap() can use /dev/zero or the MAP_ANONYMOUS flag
                     38: to create virtual memory pages.
                     39: 
                     40: Complete information on the use of Electric Fence is in the manual page
                     41: libefence.3 .
                     42: 
                     43:        Thanks
                     44: 
                     45:        Bruce Perens
                     46:        Bruce@Pixar.com