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-rw-r--r--ChangeLog16
-rw-r--r--debug/chk_fail.c14
-rw-r--r--debug/test-strcpy_chk.c49
-rw-r--r--debug/tst-chk1.c13
-rw-r--r--include/stdio.h2
-rw-r--r--malloc/malloc.c48
6 files changed, 78 insertions, 64 deletions
diff --git a/ChangeLog b/ChangeLog
index b62c2e1..1888ce0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2004-11-12 Ulrich Drepper <drepper@redhat.com>
+
+ * sysdeps/unix/sysv/linux/libc_fatal.c: Add new function __libc_message
+ which performs the printing and simple format string handling. The
+ string is written to tty, stderr, syslog in this order, stopping after
+ the first successful output.
+ (__libc_fatal): Call __libc_message.
+ * include/stdio.h: Declare __libc_message.
+ * malloc/malloc.c (malloc_printerr): Use __libc_message.
+ * debug/chk_fail.c: Also print message with __libc_message.
+ * debug/test-strcpy_chk.c: Ensure that debug messages are not printed
+ to the terminal or stderr.
+ * debug/tst-chk1.c: Likewise.
+
+ * posix/Makefile: Remove gpl2lgpl variable.
+
2004-11-12 Martin Schwidefsky <schwidefsky@de.ibm.com>
* elf/elf.h: Add 20 bit relocations R_390_*20.
diff --git a/debug/chk_fail.c b/debug/chk_fail.c
index 48848fb..dc1c3d7 100644
--- a/debug/chk_fail.c
+++ b/debug/chk_fail.c
@@ -1,3 +1,4 @@
+
/* Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
@@ -16,23 +17,14 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
+#include <stdio.h>
#include <stdlib.h>
-#include <unistd.h>
-#include <abort-instr.h>
void
__attribute__ ((noreturn))
__chk_fail (void)
{
- while (1)
- {
- /* This will leave a nice backtrace. */
- abort ();
-#ifdef ABORT_INSTRUCTION
- ABORT_INSTRUCTION;
-#endif
- _exit (127);
- }
+ __libc_fatal ("*** buffer overflow detected ***\n");
}
libc_hidden_def (__chk_fail)
diff --git a/debug/test-strcpy_chk.c b/debug/test-strcpy_chk.c
index 4c61f4f..ac9f944 100644
--- a/debug/test-strcpy_chk.c
+++ b/debug/test-strcpy_chk.c
@@ -46,6 +46,8 @@ simple_strcpy_chk (char *dst, const char *src, size_t len)
}
#endif
+#include <fcntl.h>
+#include <paths.h>
#include <setjmp.h>
#include <signal.h>
@@ -80,8 +82,8 @@ do_one_test (impl_t *impl, char *dst, const char *src,
if (setjmp (chk_fail_buf) == 0)
{
res = CALL (impl, dst, src, dlen);
- error (0, 0, "Function %s (%zd; %zd) did not __chk_fail",
- impl->name, len, dlen);
+ printf ("*** Function %s (%zd; %zd) did not __chk_fail\n",
+ impl->name, len, dlen);
chk_fail_ok = 0;
ret = 1;
}
@@ -92,16 +94,16 @@ do_one_test (impl_t *impl, char *dst, const char *src,
if (res != STRCPY_RESULT (dst, len))
{
- error (0, 0, "Wrong result in function %s %p %p", impl->name,
- res, STRCPY_RESULT (dst, len));
+ printf ("Wrong result in function %s %p %p\n", impl->name,
+ res, STRCPY_RESULT (dst, len));
ret = 1;
return;
}
if (strcmp (dst, src) != 0)
{
- error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
- impl->name, dst, src);
+ printf ("Wrong result in function %s dst \"%s\" src \"%s\"\n",
+ impl->name, dst, src);
ret = 1;
return;
}
@@ -232,7 +234,7 @@ do_random_tests (void)
if (setjmp (chk_fail_buf) == 0)
{
res = CALL (impl, p2 + align2, p1 + align1, dlen);
- error (0, 0, "Iteration %zd - did not __chk_fail", n);
+ printf ("Iteration %zd - did not __chk_fail\n", n);
chk_fail_ok = 0;
ret = 1;
}
@@ -243,17 +245,19 @@ do_random_tests (void)
res = CALL (impl, p2 + align2, p1 + align1, dlen);
if (res != STRCPY_RESULT (p2 + align2, len))
{
- error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
- n, impl->name, align1, align2, len, res,
- STRCPY_RESULT (p2 + align2, len));
+ printf ("\
+Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p\n",
+ n, impl->name, align1, align2, len, res,
+ STRCPY_RESULT (p2 + align2, len));
ret = 1;
}
for (j = 0; j < align2 + 64; ++j)
{
if (p2[j - 64] != '\1')
{
- error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
- n, impl->name, align1, align2, len);
+ printf ("\
+Iteration %zd - garbage before, %s (%zd, %zd, %zd)\n",
+ n, impl->name, align1, align2, len);
ret = 1;
break;
}
@@ -262,16 +266,18 @@ do_random_tests (void)
{
if (p2[j] != '\1')
{
- error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
- n, impl->name, align1, align2, len);
+ printf ("\
+Iteration %zd - garbage after, %s (%zd, %zd, %zd)\n",
+ n, impl->name, align1, align2, len);
ret = 1;
break;
}
}
if (memcmp (p1 + align1, p2 + align2, len + 1))
{
- error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
- n, impl->name, align1, align2, len);
+ printf ("\
+Iteration %zd - different strings, %s (%zd, %zd, %zd)\n",
+ n, impl->name, align1, align2, len);
ret = 1;
}
}
@@ -290,6 +296,17 @@ test_main (void)
sigaction (SIGABRT, &sa, NULL);
+ /* Avoid all the buffer overflow messages on stderr. */
+ int fd = open (_PATH_DEVNULL, O_WRONLY);
+ if (fd == -1)
+ close (STDERR_FILENO);
+ else
+ {
+ dup2 (fd, STDERR_FILENO);
+ close (fd);
+ }
+ setenv ("LIBC_FATAL_STDERR_", "1", 1);
+
test_init ();
printf ("%23s", "");
diff --git a/debug/tst-chk1.c b/debug/tst-chk1.c
index fb2074d..37320c3 100644
--- a/debug/tst-chk1.c
+++ b/debug/tst-chk1.c
@@ -17,6 +17,8 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
+#include <fcntl.h>
+#include <paths.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
@@ -106,6 +108,17 @@ do_test (void)
sigaction (SIGABRT, &sa, NULL);
+ /* Avoid all the buffer overflow messages on stderr. */
+ int fd = open (_PATH_DEVNULL, O_WRONLY);
+ if (fd == -1)
+ close (STDERR_FILENO);
+ else
+ {
+ dup2 (fd, STDERR_FILENO);
+ close (fd);
+ }
+ setenv ("LIBC_FATAL_STDERR_", "1", 1);
+
struct A { char buf1[9]; char buf2[1]; } a;
printf ("Test checking routines at fortify level %d\n",
diff --git a/include/stdio.h b/include/stdio.h
index 05a91b4..ad8f157 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -62,6 +62,8 @@ extern int __gen_tempname (char *__tmpl, int __kind);
/* Print out MESSAGE on the error output and abort. */
extern void __libc_fatal (__const char *__message)
__attribute__ ((__noreturn__));
+extern void __libc_message (int do_abort, __const char *__fnt, ...)
+ __attribute__ ((__noreturn__));
/* Acquire ownership of STREAM. */
extern void __flockfile (FILE *__stream);
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 6d6294c..3f4fd77 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -5474,45 +5474,19 @@ malloc_printerr(int action, const char *str, void *ptr)
{
if (action & 1)
{
- /* output string will be ": ADDR ***\n" */
- static const char suffix[] = " ***\n";
- static const char prefix[] = ": 0x";
- char buf[sizeof (prefix) - 1 + sizeof (void *) * 2 + sizeof (suffix)];
- char *cp;
- if (action & 4)
- cp = memcpy (&buf[sizeof (buf) - 2], "\n", 2);
- else
- {
- cp = memcpy (&buf[sizeof (buf) - sizeof (suffix)], suffix,
- sizeof (suffix));
- cp = _itoa_word ((unsigned long int) ptr, cp, 16, 0);
- while (cp > &buf[sizeof (prefix) - 1])
- *--cp = '0';
- cp = memcpy (buf, prefix, sizeof (prefix) - 1);
- }
+ char buf[2 * sizeof (uintptr_t) + 1];
- struct iovec iov[3];
- int n = 0;
- if ((action & 4) == 0)
- {
- iov[0].iov_base = (char *) "*** glibc detected *** ";
- iov[0].iov_len = strlen (iov[0].iov_base);
- ++n;
- }
- iov[n].iov_base = (char *) str;
- iov[n].iov_len = strlen (str);
- ++n;
- iov[n].iov_base = cp;
- iov[n].iov_len = &buf[sizeof (buf) - 1] - cp;
- ++n;
- if (TEMP_FAILURE_RETRY (__writev (STDERR_FILENO, iov, n)) == -1
- && errno == EBADF)
- /* Standard error is not opened. Try using syslog. */
- syslog (LOG_ERR, "%s%s%s", (char *) iov[0].iov_base,
- (char *) iov[1].iov_base,
- n == 3 ? (const char *) iov[2].iov_base : "");
+ buf[sizeof (buf) - 1] = '\0';
+ char *cp = _itoa_word ((uintptr_t) ptr, &buf[sizeof (buf) - 1], 16, 0);
+ while (cp > buf)
+ *--cp = '0';
+
+ __libc_message (action & 2,
+ action & 4
+ ? "%s\n" : "*** glibc detected *** %s: 0x%s ***\n",
+ str, cp);
}
- if (action & 2)
+ else if (action & 2)
abort ();
}
generated by cgit v1.1 at 2024-12-02 19:13:52 +0000