From d7de8e3ce962db7df6f4107101a87f53129e98eb Mon Sep 17 00:00:00 2001
From: Tom Tromey <tromey@redhat.com>
Date: Thu, 20 Sep 2012 20:54:11 +0000
Subject: [PATCH] 	* NEWS: Update. 	* python/python.c
 (finalize_python): New function. 	(_initialize_python): Make a final
 cleanup. testsuite 	* gdb.python/python.exp: Test atexit.register.

---
 gdb/ChangeLog                       |  6 ++++++
 gdb/NEWS                            |  2 ++
 gdb/python/python.c                 | 19 +++++++++++++++++++
 gdb/testsuite/ChangeLog             |  4 ++++
 gdb/testsuite/gdb.python/python.exp | 18 ++++++++++++++++++
 5 files changed, 49 insertions(+)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d36c95e..b11ac7c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2012-09-20  Tom Tromey  <tromey@redhat.com>
+
+	* NEWS: Update.
+	* python/python.c (finalize_python): New function.
+	(_initialize_python): Make a final cleanup.
+
 2012-09-19  Doug Evans  <dje@google.com>
 
 	* buildsym.h (param_symbols): Delete, unused.
diff --git a/gdb/NEWS b/gdb/NEWS
index 365b2d4..86f57d8 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -7,6 +7,8 @@
 
   ** Vectors can be created with gdb.Type.vector.
 
+  ** Python's atexit.register now works in GDB.
+
 * New Python-based convenience functions:
 
   ** $_memeq(buf1, buf2, length)
diff --git a/gdb/python/python.c b/gdb/python/python.c
index 3cfb284..c66dc60 100644
--- a/gdb/python/python.c
+++ b/gdb/python/python.c
@@ -1266,6 +1266,24 @@ user_show_python (char *args, int from_tty)
 
 /* Initialize the Python code.  */
 
+/* This is installed as a final cleanup and cleans up the
+   interpreter.  This lets Python's 'atexit' work.  */
+
+static void
+finalize_python (void *ignore)
+{
+  /* We don't use ensure_python_env here because if we ever ran the
+     cleanup, gdb would crash -- because the cleanup calls into the
+     Python interpreter, which we are about to destroy.  It seems
+     clearer to make the needed calls explicitly here than to create a
+     cleanup and then mysteriously discard it.  */
+  PyGILState_Ensure ();
+  python_gdbarch = target_gdbarch;
+  python_language = current_language;
+
+  Py_Finalize ();
+}
+
 /* Provide a prototype to silence -Wmissing-prototypes.  */
 extern initialize_file_ftype _initialize_python;
 
@@ -1427,6 +1445,7 @@ message == an error message without a stack will be printed."),
   PyThreadState_Swap (NULL);
   PyEval_ReleaseLock ();
 
+  make_final_cleanup (finalize_python, NULL);
 #endif /* HAVE_PYTHON */
 }
 
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index b7e0f0b..789b49d 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2012-09-20  Tom Tromey  <tromey@redhat.com>
+
+	* gdb.python/python.exp: Test atexit.register.
+
 2012-09-20  Doug Evans  <dje@google.com>
 
 	* boards/dwarf4-gdb-index.exp: New file.
diff --git a/gdb/testsuite/gdb.python/python.exp b/gdb/testsuite/gdb.python/python.exp
index 9f29e3a..6f0ce1c 100644
--- a/gdb/testsuite/gdb.python/python.exp
+++ b/gdb/testsuite/gdb.python/python.exp
@@ -141,6 +141,24 @@ gdb_test "python print a" ".*aliases -- Aliases of other commands.*" "verify hel
 gdb_py_test_silent_cmd "python nothread = gdb.selected_thread()" "Attempt to aquire thread with no inferior" 1
 gdb_test "python print nothread == None" "True" "Ensure that no threads are returned"
 
+gdb_py_test_multiple "register atexit function" \
+    "python" "" \
+    "import atexit" "" \
+    "def printit(arg):" "" \
+    "  print arg" "" \
+    "atexit.register(printit, 'good bye world')" "" \
+    "end" ""
+
+send_gdb "quit\n"
+gdb_expect {
+    -re "good bye world" {
+	pass "atexit handling"
+    }
+    default {
+	fail "atexit handling"
+    }
+}
+
 # Start with a fresh gdb.
 clean_restart ${testfile}
 
-- 
2.7.4