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authorTom Tromey <tom@tromey.com>2015-04-29 09:44:24 -0600
committerTom Tromey <tom@tromey.com>2017-02-14 10:38:56 -0700
commit3f77c7691fc5ff92eef90f39bb972f25c7422fb0 (patch)
tree99e0da3d325474407055aee6a389eacec702623e /gdb
parent075beec08ae857d918890c30d290863abb3f7f57 (diff)
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PR python/13598 - add before_prompt event
This adds an event that is emitted just before GDB presents a prompt to the user. This provides Python code a way to react to whatever changes might have been made by the previous command. For example, in my GUI I use this to track changes to the selected frame and reflect them in the UI. Built and regtested on x86-64 Fedora 23. gdb/ChangeLog 2017-02-14 Tom Tromey <tom@tromey.com> PR python/13598: * python/python.c (gdbpy_before_prompt_hook): Emit before_prompt event. * python/py-evts.c (gdbpy_initialize_py_events): Add before_prompt registry. * python/py-events.h (events_object) <before_prompt>: New field. gdb/doc/ChangeLog 2017-02-14 Tom Tromey <tom@tromey.com> PR python/13598: * python.texi (Events In Python): Document events.before_prompt. gdb/testsuite/ChangeLog 2017-02-14 Tom Tromey <tom@tromey.com> PR python/13598: * gdb.python/py-events.exp: Add before_prompt event tests.
Diffstat (limited to 'gdb')
-rw-r--r--gdb/ChangeLog9
-rw-r--r--gdb/doc/ChangeLog5
-rw-r--r--gdb/doc/python.texi4
-rw-r--r--gdb/python/py-events.h1
-rw-r--r--gdb/python/py-evts.c3
-rw-r--r--gdb/python/python.c5
-rw-r--r--gdb/testsuite/ChangeLog5
-rw-r--r--gdb/testsuite/gdb.python/py-events.exp25
8 files changed, 57 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index ae33435..2cd6ac9 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,12 @@
+2017-02-14 Tom Tromey <tom@tromey.com>
+
+ PR python/13598:
+ * python/python.c (gdbpy_before_prompt_hook): Emit before_prompt
+ event.
+ * python/py-evts.c (gdbpy_initialize_py_events): Add
+ before_prompt registry.
+ * python/py-events.h (events_object) <before_prompt>: New field.
+
2017-02-14 Markus Metzger <markus.t.metzger@intel.com>
* btrace.c (ftrace_new_switch): Preserve up link and flags.
diff --git a/gdb/doc/ChangeLog b/gdb/doc/ChangeLog
index 7f125bc..0b6139d 100644
--- a/gdb/doc/ChangeLog
+++ b/gdb/doc/ChangeLog
@@ -1,3 +1,8 @@
+2017-02-14 Tom Tromey <tom@tromey.com>
+
+ PR python/13598:
+ * python.texi (Events In Python): Document events.before_prompt.
+
2017-02-13 Luis Machado <lgustavo@codesourcery.com>
* gdb.texinfo (Target Commands): Document the optional offset
diff --git a/gdb/doc/python.texi b/gdb/doc/python.texi
index d1cbadb..c3ea203 100644
--- a/gdb/doc/python.texi
+++ b/gdb/doc/python.texi
@@ -2981,6 +2981,10 @@ emitted, the @code{gdb.Breakpoint} object will already be in its
invalid state; that is, the @code{is_valid} method will return
@code{False}.
+@item events.before_prompt
+This event carries no payload. It is emitted each time @value{GDBN}
+presents a prompt to the user.
+
@end table
@node Threads In Python
diff --git a/gdb/python/py-events.h b/gdb/python/py-events.h
index 98eb609..348dabc 100644
--- a/gdb/python/py-events.h
+++ b/gdb/python/py-events.h
@@ -53,6 +53,7 @@ typedef struct
eventregistry_object *breakpoint_created;
eventregistry_object *breakpoint_deleted;
eventregistry_object *breakpoint_modified;
+ eventregistry_object *before_prompt;
PyObject *module;
diff --git a/gdb/python/py-evts.c b/gdb/python/py-evts.c
index dc7117f..4766bd6 100644
--- a/gdb/python/py-evts.c
+++ b/gdb/python/py-evts.c
@@ -100,6 +100,9 @@ gdbpy_initialize_py_events (void)
"breakpoint_modified") < 0)
return -1;
+ if (add_new_registry (&gdb_py_events.before_prompt, "before_prompt") < 0)
+ return -1;
+
if (gdb_pymodule_addobject (gdb_module,
"events",
(PyObject *) gdb_py_events.module) < 0)
diff --git a/gdb/python/python.c b/gdb/python/python.c
index f878f9a..73fb3d0 100644
--- a/gdb/python/python.c
+++ b/gdb/python/python.c
@@ -100,6 +100,7 @@ const struct extension_language_defn extension_language_python =
#include "interps.h"
#include "event-top.h"
#include "py-ref.h"
+#include "py-event.h"
/* True if Python has been successfully initialized, false
otherwise. */
@@ -969,6 +970,10 @@ gdbpy_before_prompt_hook (const struct extension_language_defn *extlang,
gdbpy_enter enter_py (get_current_arch (), current_language);
+ if (!evregpy_no_listeners_p (gdb_py_events.before_prompt)
+ && evpy_emit_event (NULL, gdb_py_events.before_prompt) < 0)
+ return EXT_LANG_RC_ERROR;
+
if (gdb_python_module
&& PyObject_HasAttrString (gdb_python_module, "prompt_hook"))
{
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index a54eb67..a67a69c 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-02-14 Tom Tromey <tom@tromey.com>
+
+ PR python/13598:
+ * gdb.python/py-events.exp: Add before_prompt event tests.
+
2017-02-14 Andreas Arnez <arnez@linux.vnet.ibm.com>
* gdb.dwarf2/implptrpiece.exp: Fix check for big-endian targets.
diff --git a/gdb/testsuite/gdb.python/py-events.exp b/gdb/testsuite/gdb.python/py-events.exp
index 16ea110..8ec2dd1 100644
--- a/gdb/testsuite/gdb.python/py-events.exp
+++ b/gdb/testsuite/gdb.python/py-events.exp
@@ -210,3 +210,28 @@ gdb_test "continue" ".*event type: continue.*
.*exit code: 12.*
.*exit inf: 2.*
dir ok: True.*" "Inferior 2 terminated."
+
+
+# Test before_prompt event.
+gdb_py_test_multiple "define new user command" \
+ "define xxz" "End with a line saying just .end.." \
+ "set variable \$x = 72" "" \
+ "set variable \$y = 93" "" \
+ "end" ""
+
+gdb_py_test_multiple "add before_prompt listener" \
+ "python" "" \
+ "count = 0" "" \
+ "def listener():" "" \
+ " global count" "" \
+ " count = count + 1" "" \
+ "gdb.events.before_prompt.connect(listener)" "" \
+ "end" ""
+
+gdb_test_no_output "set variable \$x = 32" "do something"
+# Result is due to one emitted before "set var" and one emitted before
+# this command.
+gdb_test "python print(count)" 2 "check for before_prompt event"
+
+gdb_test_no_output "xxz" "run a canned sequence"
+gdb_test "python print(count)" 4 "check for before_prompt event"