PR python/17698 - add Breakpoint.pending

This patch adds a "pending" attribute to gdb.Breakpoint.

Built and regtested on x86-64 Fedora 23.

2016-07-13  Tom Tromey  <tom@tromey.com>

	PR python/17698:
	* NEWS: Update.
	* python/py-breakpoint.c (bppy_get_pending): New function.
	(breakpoint_object_getset): Add entry for "pending".
	* breakpoint.h (pending_breakpoint_p): Declare.
	* breakpoint.c (pending_breakpoint_p): New function.

2016-07-13  Tom Tromey  <tom@tromey.com>

	PR python/17698:
	* python.texi (Breakpoints In Python): Document
	Breakpoint.pending.

2016-07-13  Tom Tromey  <tom@tromey.com>

	PR python/17698:
	* gdb.python/py-breakpoint.exp (test_bkpt_basic): Add "pending"
	test.
	(test_watchpoints): Likewise.
	(test_bkpt_pending): New proc.

gdb/ChangeLog

@@ -1,3 +1,12 @@
+2016-07-13  Tom Tromey  <tom@tromey.com>
+
+	PR python/17698:
+	* NEWS: Update.
+	* python/py-breakpoint.c (bppy_get_pending): New function.
+	(breakpoint_object_getset): Add entry for "pending".
+	* breakpoint.h (pending_breakpoint_p): Declare.
+	* breakpoint.c (pending_breakpoint_p): New function.
+
 2016-07-13  Tom Tromey  <tom@tromey.com>
 
 	* python/py-breakpoint.c (bppy_get_visibility)

gdb/NEWS

@@ -80,6 +80,11 @@ new-ui INTERP TTY
   Start a new user interface instance running INTERP as interpreter,
   using the TTY file for input/output.
 
+* Python Scripting
+
+  ** gdb.Breakpoint objects have a new attribute "pending", which
+     indicates whether the breakpoint is pending.
+
 * Support for tracepoints and fast tracepoints on s390-linux and s390x-linux
   was added in GDBserver, including JIT compiling fast tracepoint's
   conditional expression bytecode into native code.

gdb/breakpoint.c

@@ -6815,6 +6815,14 @@ user_breakpoint_p (struct breakpoint *b)
   return b->number > 0;
 }
 
+/* See breakpoint.h.  */
+
+int
+pending_breakpoint_p (struct breakpoint *b)
+{
+  return b->loc == NULL;
+}
+
 /* Print information on user settable breakpoint (watchpoint, etc)
    number BNUM.  If BNUM is -1 print all user-settable breakpoints.
    If ALLFLAG is non-zero, include non-user-settable breakpoints.  If

gdb/breakpoint.h

@@ -1618,6 +1618,9 @@ extern int pc_at_non_inline_function (struct address_space *aspace,
 
 extern int user_breakpoint_p (struct breakpoint *);
 
+/* Return true if this breakpoint is pending, false if not.  */
+extern int pending_breakpoint_p (struct breakpoint *);
+
 /* Attempt to determine architecture of location identified by SAL.  */
 extern struct gdbarch *get_sal_arch (struct symtab_and_line sal);
 

gdb/doc/ChangeLog

@@ -1,3 +1,9 @@
+2016-07-13  Tom Tromey  <tom@tromey.com>
+
+	PR python/17698:
+	* python.texi (Breakpoints In Python): Document
+	Breakpoint.pending.
+
 2016-07-13  Tom Tromey  <tom@tromey.com>
 
 	* python.texi (Breakpoints In Python): Move table of types and

gdb/doc/python.texi

@@ -4685,6 +4685,12 @@ first command is @code{silent}.  This is not reported by the
 @code{silent} attribute.
 @end defvar
 
+@defvar Breakpoint.pending
+This attribute is @code{True} if the breakpoint is pending, and
+@code{False} otherwise.  @xref{Set Breaks}.  This attribute is
+read-only.
+@end defvar
+
 @anchor{python_breakpoint_thread}
 @defvar Breakpoint.thread
 If the breakpoint is thread-specific, this attribute holds the

gdb/python/py-breakpoint.c

@@ -563,6 +563,24 @@ bppy_get_temporary (PyObject *self, void *closure)
   Py_RETURN_FALSE;
 }
 
+/* Python function to determine if the breakpoint is a pending
+   breakpoint.  */
+
+static PyObject *
+bppy_get_pending (PyObject *self, void *closure)
+{
+  gdbpy_breakpoint_object *self_bp = (gdbpy_breakpoint_object *) self;
+
+  BPPY_REQUIRE_VALID (self_bp);
+
+  if (is_watchpoint (self_bp->bp))
+    Py_RETURN_FALSE;
+  if (pending_breakpoint_p (self_bp->bp))
+    Py_RETURN_TRUE;
+
+  Py_RETURN_FALSE;
+}
+
 /* Python function to get the breakpoint's number.  */
 static PyObject *
 bppy_get_number (PyObject *self, void *closure)
@@ -1054,6 +1072,8 @@ or None if no condition set."},
     "Whether the breakpoint is visible to the user."},
   { "temporary", bppy_get_temporary, NULL,
     "Whether this breakpoint is a temporary breakpoint."},
+  { "pending", bppy_get_pending, NULL,
+    "Whether this breakpoint is a pending breakpoint."},
   { NULL }  /* Sentinel.  */
 };
 

gdb/testsuite/ChangeLog

@@ -1,3 +1,11 @@
+2016-07-13  Tom Tromey  <tom@tromey.com>
+
+	PR python/17698:
+	* gdb.python/py-breakpoint.exp (test_bkpt_basic): Add "pending"
+	test.
+	(test_watchpoints): Likewise.
+	(test_bkpt_pending): New proc.
+
 2016-07-13  Tom Tromey  <tom@tromey.com>
 
 	PR cli/18053:

gdb/testsuite/gdb.python/py-breakpoint.exp

@@ -49,6 +49,8 @@ proc test_bkpt_basic { } {
 	    "<gdb.Breakpoint object at $hex>" "Check obj exists @main"
 	gdb_test "python print (blist\[0\].location)" \
 	    "main." "Check breakpoint location @main"
+	gdb_test "python print (blist\[0\].pending)" "False" \
+	    "Check pending status of main breakpoint"
 
 	set mult_line [gdb_get_line_number "Break at multiply."]
 	gdb_breakpoint ${mult_line}
@@ -267,6 +269,7 @@ proc test_watchpoints { } {
 
 	gdb_py_test_silent_cmd  "python wp1 = gdb.Breakpoint (\"result\", type=gdb.BP_WATCHPOINT, wp_class=gdb.WP_WRITE )" \
 	    "Set watchpoint" 0
+	gdb_test "python print (wp1.pending)" "False"
 	gdb_test "continue" \
 	    ".*\[Ww\]atchpoint.*result.*Old value = 0.*New value = 25.*main.*" \
 	    "Test watchpoint write"
@@ -497,6 +500,13 @@ proc test_bkpt_address {} {
 	".*Breakpoint ($decimal)+ at .*$srcfile, line ($decimal)+\."
 }
 
+proc test_bkpt_pending {} {
+    delete_breakpoints
+    gdb_breakpoint "nosuchfunction" allow-pending
+    gdb_test "python print (gdb.breakpoints()\[0\].pending)" "True" \
+	"Check pending status of pending breakpoint"
+}
+
 test_bkpt_basic
 test_bkpt_deletion
 test_bkpt_cond_and_cmds
@@ -506,3 +516,4 @@ test_bkpt_internal
 test_bkpt_eval_funcs
 test_bkpt_temporary
 test_bkpt_address
+test_bkpt_pending