gdb/

	Make core files the process_stratum.
	* corefile.c (core_target): New variable.
	(core_file_command): Remove variable t, use core_target.
	* corelow.c (core_ops): Make it static.
	(init_core_ops): Change to process_stratum.  Initialize CORE_TARGET.
	* defs.h (make_cleanup_unpush_target): New prototype.
	* gdbarch.h: Regenerate.
	* gdbarch.sh (core_pid_to_str): Remove core_stratum from its comment.
	* gdbcore.h (core_target): New declaration.
	* inf-ptrace.c (inf_ptrace_create_inferior, inf_ptrace_attach): New
	variables ops_already_pushed and back_to.  Use push_target,
	make_cleanup_unpush_target and discard_cleanups calls.
	* record.c (record_open): Replace core_stratum by a core_bfd check.
	* target.c (target_is_pushed): New function.
	(find_core_target): Remove.
	* target.h (enum strata) <core_stratum>: Remove.
	(target_is_pushed): New declaration.
	(find_core_target): Remove declaration.
	* tracepoint.c (init_tfile_ops) <to_stratum>: Remove comment.
	* utils.c (do_unpush_target, make_cleanup_unpush_target): New functions.

gdb/doc/
	Make core files the process_stratum.
	* gdb.texinfo (Active Targets): Remove core_stratum.  Include
	record_stratum example.

gdb/testsuite/
	Make core files the process_stratum.
	* gdb.base/corefile.exp (run: load core again)
	(run: sanity check we see the core file, run: with core)
	(run: core file is cleared, attach: load core again)
	(attach: sanity check we see the core file, attach: with core)
	(attach: core file is cleared): New tests.
	* gdb.base/coremaker.c (main): New parameters.  Implement "sleep" argv.

1 files changed, 18 insertions, 0 deletions

diff --git a/gdb/utils.c b/gdb/utils.c
index a8beb37..0eaa050 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -352,6 +352,24 @@ make_cleanup_restore_integer (int *variable)
 			   xfree);
 }
 
+/* Helper for make_cleanup_unpush_target.  */
+
+static void
+do_unpush_target (void *arg)
+{
+  struct target_ops *ops = arg;
+
+  unpush_target (ops);
+}
+
+/* Return a new cleanup that unpushes OPS.  */
+
+struct cleanup *
+make_cleanup_unpush_target (struct target_ops *ops)
+{
+  return make_my_cleanup (&cleanup_chain, do_unpush_target, ops);
+}
+
 struct cleanup *
 make_my_cleanup2 (struct cleanup **pmy_chain, make_cleanup_ftype *function,
 		  void *arg,  void (*free_arg) (void *))