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_dl_exception_create_format: Support %x/%lx/%zx

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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.
This commit is contained in:
H.J. Lu 2018-11-29 14:15:01 -08:00
parent 3a67e81d75
commit a5275ba537
4 changed files with 153 additions and 1 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2018-11-29 H.J. Lu <hongjiu.lu@intel.com>
Adhemerval Zanella <adhemerval.zanella@linaro.org>
* 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.
2018-11-29 Charles-Antoine Couret <charles-antoine.couret@essensium.com>
* argp/argp-fmtstream.c (__argp_fmtstream_update): Use [_LIBC]

3
elf/Makefile
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@ -192,7 +192,8 @@ tests += restest1 preloadtest loadfail multiload origtest resolvfail \
tests-internal += loadtest unload unload2 circleload1 \
neededtest neededtest2 neededtest3 neededtest4 \
tst-tls3 tst-tls6 tst-tls7 tst-tls8 tst-dlmopen2 \
tst-ptrguard1 tst-stackguard1 tst-libc_dlvsym
tst-ptrguard1 tst-stackguard1 tst-libc_dlvsym \
tst-create_format1
ifeq ($(build-hardcoded-path-in-tests),yes)
tests += tst-dlopen-aout
tst-dlopen-aout-no-pie = yes

40
elf/dl-exception.c
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@ -111,6 +111,20 @@ _dl_exception_create_format (struct dl_exception *exception, const char *objname
case 's':
length += strlen (va_arg (ap, const char *));
break;
/* Recognize the l modifier. It is only important on some
platforms where long and int have a different size. We
can use the same code for size_t. */
case 'l':
case 'z':
if (p[1] == 'x')
{
length += LONG_WIDTH / 4;
++p;
break;
}
case 'x':
length += INT_WIDTH / 4;
break;
default:
/* Assumed to be '%'. */
++length;
@ -167,6 +181,32 @@ _dl_exception_create_format (struct dl_exception *exception, const char *objname
*wptr = '%';
++wptr;
break;
case 'x':
{
unsigned long int num = va_arg (ap, unsigned int);
char *start = wptr;
wptr += INT_WIDTH / 4;
char *cp = _itoa (num, wptr, 16, 0);
/* Pad to the full width with 0. */
while (cp != start)
*--cp = '0';
}
break;
case 'l':
case 'z':
if (p[1] == 'x')
{
unsigned long int num = va_arg (ap, unsigned long int);
char *start = wptr;
wptr += LONG_WIDTH / 4;
char *cp = _itoa (num, wptr, 16, 0);
/* Pad to the full width with 0. */
while (cp != start)
*--cp = '0';
++p;
break;
}
/* FALLTHROUGH */
default:
_dl_fatal_printf ("Fatal error:"
" invalid format in exception string\n");

103
elf/tst-create_format1.c Normal file
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@ -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>