K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2018-04-24T05:20:16.571263Z
K 7
svn:log
V 835
Extend support for ptrace() tests using breakpoints.

- Use a single list of platforms to define HAVE_BREAKPOINT for platforms
  that expose a functional breakpoint() inline to userland.  Replace
  existing lists of platform tests with HAVE_BREAKPOINT instead.
- Add support for advancing PC past a breakpoint inserted via breakpoint()
  to support the existing ptrace__PT_CONTINUE_different_thread test on
  non-x86 platforms (x86 advances the PC past the breakpoint instruction,
  but other platforms do not).  This is implemented by defining a new
  SKIP_BREAK macro which accepts a pointer to a 'struct reg' as its sole
  argument and modifies the contents to advance the PC.  The intention is
  to use it in between PT_GETREGS and PT_SETREGS.

Tested on:	amd64, i386, mips (after adding a breakpoint() to mips)
MFC after:	1 month

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