gdb/guile: allow for catchpoint type breakpoints in guile

This commit adds initial support for catchpoints to the guile
breakpoint API.

This commit adds a BP_CATCHPOINT constant which corresponds to
GDB's internal bp_catchpoint.  The new constant is documented in the
manual.

The user can't create breakpoints with type BP_CATCHPOINT after this
commit, but breakpoints that already exist, obtained with
the (breakpoints) function, can now have this type.

gdb/ChangeLog:

	* guile/scm-breakpoint.c (bpscm_type_to_string): Handle
	bp_catchpoint.
	(bpscm_want_scm_wrapper_p): Likewise.
	(gdbscm_make_breakpoint): Likewise.
	(breakpoint_integer_constants): Likewise.

gdb/doc/ChangeLog:

	* guile.texinfo (Breakpoints In Guile): Add BP_CATCHPOINT
	description.

gdb/testsuite/ChangeLog:

	* gdb.guile/scm-breakpoint.exp (test_catchpoints): New proc.

gdb/testsuite/gdb.guile/scm-breakpoint.exp

@@ -519,10 +519,47 @@ proc_with_prefix test_bkpt_probe {} {
 	"register probe breakpoint"
 }
 
+proc_with_prefix test_catchpoints {} {
+    global srcfile testfile
+    global gdb_prompt decimal
+
+    # Start with a fresh gdb.
+    clean_restart ${testfile}
+
+    if ![gdb_guile_runto_main] {
+	return
+    }
+
+    # Try to create a catchpoint, currently this isn't supported via
+    # the guile api.
+    gdb_test "guile (define cp (make-breakpoint \"syscall\" #:type BP_CATCHPOINT))" \
+	"ERROR: In procedure gdbscm_make_breakpoint: unsupported breakpoint type in position 3: \"BP_CATCHPOINT\"\r\n.*" \
+	"create a catchpoint via the api"
+
+    # Setup a catchpoint.
+    set num "XXX"
+    gdb_test_multiple "catch syscall" "" {
+	-re "The feature \'catch syscall\' is not supported.*\r\n$gdb_prompt $" {
+	    unsupported "catch syscall isn't supported"
+	    return -1
+	}
+	-re "Catchpoint ($decimal) \\(any syscall\\)\r\n$gdb_prompt $" {
+	    set num $expect_out(1,string)
+	    pass $gdb_test_name
+	}
+    }
+
+    # Look for the catchpoint in the breakpoint list.
+    gdb_test "guile (for-each (lambda (b) (if (= (breakpoint-type b) BP_CATCHPOINT) (begin (display b) (newline)))) (breakpoints))" \
+	"#<gdb:breakpoint #${num} BP_CATCHPOINT enabled noisy hit:0 ignore:0>" \
+	"look for BP_CATCHPOINT in breakpoint list"
+}
+
 test_bkpt_basic
 test_bkpt_deletion
 test_bkpt_cond_and_cmds
 test_bkpt_invisible
+test_catchpoints
 test_watchpoints
 test_bkpt_internal
 test_bkpt_eval_funcs