[RFA] Fix PR python/18984

[Tom Tromey <tom@tromey.com>]

This fixes PR python/18984.

The bug is that gdbpy_solib_name uses GDB_PY_LL_ARG, whereas it should
use GDB_PY_LLU_ARG to avoid overflow.

Built and tested on x86-64 Fedora 23.

2016-05-18  Tom Tromey  <tom@tromey.com>

	PR python/18984:
	* python/python.c (gdbpy_solib_name): Use GDB_PY_LLU_ARG.

2016-05-18  Tom Tromey  <tom@tromey.com>

	PR python/18984:
	* gdb.python/py-shared.exp: Add solib_name test.
---
 gdb/ChangeLog                          | 5 +++++
 gdb/python/python.c                    | 4 ++--
 gdb/testsuite/ChangeLog                | 5 +++++
 gdb/testsuite/gdb.python/py-shared.exp | 4 ++++
 4 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 92024b6..57d9962 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2016-05-18  Tom Tromey  <tom@tromey.com>
 
+	PR python/18984:
+	* python/python.c (gdbpy_solib_name): Use GDB_PY_LLU_ARG.
+
+2016-05-18  Tom Tromey  <tom@tromey.com>
+
 	* rust-lang.c (rust_subscript): Initialize "high".
 
 2016-05-17  Simon Marchi  <simon.marchi@ericsson.com>
diff --git a/gdb/python/python.c b/gdb/python/python.c
index c706644..1f1fece 100644
--- a/gdb/python/python.c
+++ b/gdb/python/python.c
@@ -696,9 +696,9 @@ gdbpy_solib_name (PyObject *self, PyObject *args)
 {
   char *soname;
   PyObject *str_obj;
-  gdb_py_longest pc;
+  gdb_py_ulongest pc;
 
-  if (!PyArg_ParseTuple (args, GDB_PY_LL_ARG, &pc))
+  if (!PyArg_ParseTuple (args, GDB_PY_LLU_ARG, &pc))
     return NULL;
 
   soname = solib_name_from_address (current_program_space, pc);
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index a773c63..ac37598 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2016-05-18  Tom Tromey  <tom@tromey.com>
+
+	PR python/18984:
+	* gdb.python/py-shared.exp: Add solib_name test.
+
 2016-05-18  Simon Marchi  <simon.marchi@ericsson.com>
 
 	* gdb.mi/mi-threads-interrupt.c: New file.
diff --git a/gdb/testsuite/gdb.python/py-shared.exp b/gdb/testsuite/gdb.python/py-shared.exp
index 8673e54..4192354 100644
--- a/gdb/testsuite/gdb.python/py-shared.exp
+++ b/gdb/testsuite/gdb.python/py-shared.exp
@@ -66,3 +66,7 @@ gdb_test "python print (gdb.solib_name(long(func1)))" "py-shared-sl.sl" "test fu
 gdb_test "p &main" "" "main address"
 gdb_py_test_silent_cmd "python main = gdb.history(0)" "Aquire main address" 1
 gdb_test "python print (gdb.solib_name(long(main)))" "None" "test main solib location"
+
+if {[is_lp64_target]} {
+    gdb_test "python print len(\[gdb.solib_name(0xffffffffffffffff)\])" "1"
+}
-- 
2.5.5