2012-02-21 Pedro Alves <palves@redhat.com>

2012-02-21  Pedro Alves  <palves@redhat.com>
	    Tom Tromey  <tromey@redhat.com>

	* lib/gdb.exp: Add description of test prefixes.
	(with_test_prefix): New procedure.
	* gdb.arch/altivec-abi.exp: Use with_test_prefix.
	* gdb.base/attach-pie-misread.exp: Use with_test_prefix.
	* gdb.base/break-interp.exp: Use with_test_prefix.  Use append
	instead of lappend to append to pf_prefix.
	* gdb.base/catch-load.exp: Use with_test_prefix.
	* gdb.base/disp-step-syscall.exp: Use with_test_prefix.
	* gdb.base/jit-so.exp: Use with_test_prefix.
	* gdb.base/jit.exp: Use with_test_prefix.
	* gdb.base/return-nodebug.exp (do_test): Use append instead of
	lappend to append to pf_prefix.
	* gdb.base/sepdebug.exp: Use with_test_prefix.
	* gdb.base/solib-display.exp: Use with_test_prefix.
	* gdb.base/solib-overlap.exp: Use with_test_prefix.
	* gdb.base/watch-cond-infcall.exp: Use with_test_prefix.
	* gdb.base/watchpoint.exp: Use with_test_prefix.
	* gdb.dwarf2/dw2-noloc.exp: Use with_test_prefix.
	* gdb.mi/mi-watch.exp: Use with_test_prefix.
	* gdb.mi/mi2-watch.exp: Use with_test_prefix.
	* gdb.threads/non-ldr-exc-1.exp: Use with_test_prefix.
	* gdb.threads/non-ldr-exc-2.exp: Use with_test_prefix.
	* gdb.threads/non-ldr-exc-3.exp: Use with_test_prefix.
	* gdb.threads/non-ldr-exc-4.exp: Use with_test_prefix.
	* gdb.threads/watchpoint-fork.exp: Use with_test_prefix.  Use
	append instead of lappend to append to pf_prefix.
	* gdb.threads/watchthreads-reorder.exp: Use with_test_prefix.
	* gdb.trace/change-loc.exp: Use with_test_prefix.
	* gdb.trace/pending.exp: Use with_test_prefix.
	* gdb.trace/status-stop.exp: Use with_test_prefix.
	* gdb.trace/strace.exp: Use with_test_prefix.
	* gdb.trace/trace-break.exp: Use with_test_prefix.
	* gdb.trace/unavailable.exp: Use with_test_prefix.  Use append
	instead of lappend to append to pf_prefix.