_dl_exception_create_format: Support %x/%lx/%zx

Add support for %x, %lx and %zx to _dl_exception_create_format and pad
to the full width with 0.

	* elf/Makefile (tests-internal): Add tst-create_format1.
	* elf/dl-exception.c (_dl_exception_create_format): Support
	%x, %lx and %zx.
	* elf/tst-create_format1.c: New file.

1 files changed, 103 insertions, 0 deletions

diff --git a/elf/tst-create_format1.c b/elf/tst-create_format1.c
new file mode 100644
index 0000000000..8b9edfdc69
--- /dev/null
+++ b/elf/tst-create_format1.c
@@ -0,0 +1,103 @@
+/* Check _dl_exception_create_format.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <ldsodefs.h>
+#include <array_length.h>
+
+#include <support/check.h>
+#include <support/xunistd.h>
+#include <support/capture_subprocess.h>
+
+#define TEST(es, objn, fmt, ...)					\
+  ({									\
+     struct dl_exception exception;					\
+     _dl_exception_create_format (&exception, objn, fmt, __VA_ARGS__);	\
+     TEST_COMPARE_STRING (exception.objname, objn == NULL ? "" : objn);	\
+     TEST_COMPARE_STRING (exception.errstring, es);			\
+     _dl_exception_free (&exception);					\
+   })
+
+static void
+do_test_invalid_conversion (void *closure)
+{
+  TEST ("(null)", NULL, "%p", NULL);
+}
+
+/* Exit status after abnormal termination.  */
+static int invalid_status;
+
+static void
+init_invalid_status (void)
+{
+  pid_t pid = xfork ();
+  if (pid == 0)
+    _exit (127);
+  xwaitpid (pid, &invalid_status, 0);
+  if (WIFEXITED (invalid_status))
+    invalid_status = WEXITSTATUS (invalid_status);
+}
+
+static int
+do_test (void)
+{
+  init_invalid_status ();
+
+  TEST ("test",      NULL,   "%s",      "test");
+  TEST ("test-test", NULL,   "%s-test", "test");
+  TEST ("test",      "test", "%s",      "test");
+  TEST ("test-test", "test", "%s-test", "test");
+
+  TEST ("test%",      NULL,   "%s%%",      "test");
+  TEST ("test%-test", NULL,   "%s%%-test", "test");
+  TEST ("test%",      "test", "%s%%",      "test");
+  TEST ("test%-test", "test", "%s%%-test", "test");
+
+  TEST ("0000007b",      NULL,   "%x",      123);
+  TEST ("0000007b-test", NULL,   "%x-test", 123);
+  TEST ("0000007b",      "test", "%x",      123);
+  TEST ("0000007b-test", "test", "%x-test", 123);
+
+#define TEST_LONG(es, objn, fmt, ...)				\
+  ({								\
+     if (sizeof (int) == sizeof (long int))			\
+       TEST (es, objn, fmt, __VA_ARGS__);			\
+     else							\
+       TEST ("ffffffff" es, objn, fmt, __VA_ARGS__);		\
+   })
+
+  TEST_LONG ("fffffffd",      NULL,   "%lx",      (long int)~2ul);
+  TEST_LONG ("fffffffd-test", NULL,   "%lx-test", (long int)~2ul);
+  TEST_LONG ("fffffffd",      "test", "%lx",      (long int)~2ul);
+  TEST_LONG ("fffffffd-test", "test", "%lx-test", (long int)~2ul);
+
+  TEST_LONG ("fffffffe",      NULL,   "%zx",      (size_t)~1ul);
+  TEST_LONG ("fffffffe-test", NULL,   "%zx-test", (size_t)~1ul);
+  TEST_LONG ("fffffffe",      "test", "%zx",      (size_t)~1ul);
+  TEST_LONG ("fffffffe-test", "test", "%zx-test", (size_t)~1ul);
+
+  struct support_capture_subprocess result;
+  result = support_capture_subprocess (do_test_invalid_conversion, NULL);
+  support_capture_subprocess_check (&result, "dl-exception",
+				    invalid_status, sc_allow_stderr);
+  TEST_COMPARE_STRING (result.err.buffer,
+		       "Fatal error: invalid format in exception string\n");
+
+  return 0;
+}
+
+#include <support/test-driver.c>