--- /dev/null
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2020-2021 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <stdlib.h>
+
+struct no_size
+{
+ int n;
+ int items[];
+};
+
+struct zero_size
+{
+ int n;
+ int items[0];
+};
+
+struct zero_size_only
+{
+ int items[0];
+};
+
+struct no_size *ns;
+struct zero_size *zs;
+struct zero_size_only *zso;
+
+static void
+break_here (void)
+{
+}
+
+int
+main (void)
+{
+ ns = (struct no_size *) malloc (sizeof (*ns) + 3 * sizeof (int));
+ zs = (struct zero_size *) malloc (sizeof (*zs) + 3 * sizeof (int));
+ zso = (struct zero_size_only *) malloc (sizeof (*zso) + 3 * sizeof (int));
+
+ ns->n = 3;
+ ns->items[0] = 101;
+ ns->items[1] = 102;
+ ns->items[2] = 103;
+
+ zs->n = 3;
+ zs->items[0] = 201;
+ zs->items[1] = 202;
+ zs->items[2] = 203;
+
+ zso->items[0] = 301;
+ zso->items[1] = 302;
+ zso->items[2] = 303;
+
+ break_here ();
+
+ return 0;
+}
--- /dev/null
+# Copyright 2020-2021 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+# Test getting the range of flexible array members in Python.
+
+standard_testfile
+
+if { [prepare_for_testing "failed to prepare" \
+ ${testfile} ${srcfile}] } {
+ return
+}
+
+if { ![runto break_here] } {
+ untested "could not run to break_here"
+ return
+}
+
+# The various cases are:
+#
+# - ns: flexible array member with no size
+# - zs: flexible array member with size 0 (GNU C extension that predates the
+# standardization of the feature, but widely supported)
+# - zso: zero-size only, a corner case where the array is the sole member of
+# the structure
+
+gdb_test "python ns = gdb.parse_and_eval('ns').dereference()"
+gdb_test "python zs = gdb.parse_and_eval('zs').dereference()"
+gdb_test "python zso = gdb.parse_and_eval('zso').dereference()"
+
+# Print the whole structure.
+
+gdb_test "python print(ns)" "{n = 3, items = $hex}"
+gdb_test "python print(zs)" "{n = 3, items = $hex}"
+gdb_test "python print(zso)" "{items = $hex}"
+
+# Print all items.
+
+gdb_test "python print(ns\['items'\])" "$hex"
+gdb_test "python print(ns\['items'\]\[0\])" "101"
+gdb_test "python print(ns\['items'\]\[1\])" "102"
+gdb_test "python print(ns\['items'\]\[2\])" "103"
+
+gdb_test "python print(zs\['items'\])" "$hex"
+gdb_test "python print(zs\['items'\]\[0\])" "201"
+gdb_test "python print(zs\['items'\]\[1\])" "202"
+gdb_test "python print(zs\['items'\]\[2\])" "203"
+
+gdb_test "python print(zso\['items'\])" "$hex"
+gdb_test "python print(zso\['items'\]\[0\])" "301"
+gdb_test "python print(zso\['items'\]\[1\])" "302"
+gdb_test "python print(zso\['items'\]\[2\])" "303"
+
+# Check taking the address of array elements (how PR 28675 was originally
+# reported).
+
+gdb_test "python print(ns\['items'\] == ns\['items'\]\[0\].address)" "True"
+gdb_test "python print(ns\['items'\]\[0\].address + 1 == ns\['items'\]\[1\].address)" "True"
+gdb_test "python print(zs\['items'\] == zs\['items'\]\[0\].address)" "True"
+gdb_test "python print(zs\['items'\]\[0\].address + 1 == zs\['items'\]\[1\].address)" "True"
+gdb_test "python print(zso\['items'\] == zso\['items'\]\[0\].address)" "True"
+gdb_test "python print(zso\['items'\]\[0\].address + 1 == zso\['items'\]\[1\].address)" "True"
+
+# Verify the range attribute. It looks a bit inconsistent that the high bound
+# is sometimes 0, sometimes -1, but that's what GDB produces today, so that's
+# what we test.
+
+gdb_test "python print(ns\['items'\].type.range())" "\\(0, 0\\)"
+gdb_test "python print(zs\['items'\].type.range())" "\\(0, -1\\)"
+gdb_test "python print(zso\['items'\].type.range())" "\\(0, -1\\)"
projects / thirdparty / binutils-gdb.git / commitdiff
