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commit cca9684f2d7a74fc0b28bfb1859955e0e28d7b4b
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Aug 3 11:41:53 2022 +0200
stdio: Clean up __libc_message after unconditional abort
Since commit ec2c1fcefb200c6cb7e09553f3c6af8815013d83 ("malloc:
Abort on heap corruption, without a backtrace [BZ #21754]"),
__libc_message always terminates the process. Since commit
a289ea09ea843ced6e5277c2f2e63c357bc7f9a3 ("Do not print backtraces
on fatal glibc errors"), the backtrace facility has been removed.
Therefore, remove enum __libc_message_action and the action
argument of __libc_message, and mark __libc_message as _No_return.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
diff --git a/debug/fortify_fail.c b/debug/fortify_fail.c
index 9fa07af4867c2bd1..1b490d9da78b8d0d 100644
--- a/debug/fortify_fail.c
+++ b/debug/fortify_fail.c
@@ -21,8 +21,6 @@ void
__attribute__ ((noreturn))
__fortify_fail (const char *msg)
{
- /* The loop is added only to keep gcc happy. */
- while (1)
- __libc_message (do_abort, "*** %s ***: terminated\n", msg);
+ __libc_message ("*** %s ***: terminated\n", msg);
}
libc_hidden_def (__fortify_fail)
diff --git a/include/stdio.h b/include/stdio.h
index 23b7fd288cdaba66..3d4544575318a934 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -143,18 +143,11 @@ extern int __gen_tempname (char *__tmpl, int __suffixlen, int __flags,
# define __GT_DIR 1 /* create a directory */
# define __GT_NOCREATE 2 /* just find a name not currently in use */
-enum __libc_message_action
-{
- do_message = 0, /* Print message. */
- do_abort = 1 << 0, /* Abort. */
-};
-
/* Print out MESSAGE (which should end with a newline) on the error output
and abort. */
extern void __libc_fatal (const char *__message)
__attribute__ ((__noreturn__));
-extern void __libc_message (enum __libc_message_action action,
- const char *__fnt, ...) attribute_hidden;
+_Noreturn void __libc_message (const char *__fnt, ...) attribute_hidden;
extern void __fortify_fail (const char *msg) __attribute__ ((__noreturn__));
libc_hidden_proto (__fortify_fail)
diff --git a/malloc/malloc.c b/malloc/malloc.c
index d31e985ecce968fe..918e7936f1983437 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -298,8 +298,7 @@ _Noreturn static void
__malloc_assert (const char *assertion, const char *file, unsigned int line,
const char *function)
{
- __libc_message (do_abort, "\
-Fatal glibc error: malloc assertion failure in %s: %s\n",
+ __libc_message ("Fatal glibc error: malloc assertion failure in %s: %s\n",
function, assertion);
__builtin_unreachable ();
}
@@ -5528,7 +5527,7 @@ static void
malloc_printerr (const char *str)
{
#if IS_IN (libc)
- __libc_message (do_abort, "%s\n", str);
+ __libc_message ("%s\n", str);
#else
__libc_fatal (str);
#endif
diff --git a/sysdeps/posix/libc_fatal.c b/sysdeps/posix/libc_fatal.c
index 6d24bee6134856d1..1feacfbeba765035 100644
--- a/sysdeps/posix/libc_fatal.c
+++ b/sysdeps/posix/libc_fatal.c
@@ -54,7 +54,7 @@ struct str_list
/* Abort with an error message. */
void
-__libc_message (enum __libc_message_action action, const char *fmt, ...)
+__libc_message (const char *fmt, ...)
{
va_list ap;
int fd = -1;
@@ -123,36 +123,31 @@ __libc_message (enum __libc_message_action action, const char *fmt, ...)
WRITEV_FOR_FATAL (fd, iov, nlist, total);
- if ((action & do_abort))
+ total = (total + 1 + GLRO(dl_pagesize) - 1) & ~(GLRO(dl_pagesize) - 1);
+ struct abort_msg_s *buf = __mmap (NULL, total,
+ PROT_READ | PROT_WRITE,
+ MAP_ANON | MAP_PRIVATE, -1, 0);
+ if (__glibc_likely (buf != MAP_FAILED))
{
- total = ((total + 1 + GLRO(dl_pagesize) - 1)
- & ~(GLRO(dl_pagesize) - 1));
- struct abort_msg_s *buf = __mmap (NULL, total,
- PROT_READ | PROT_WRITE,
- MAP_ANON | MAP_PRIVATE, -1, 0);
- if (__glibc_likely (buf != MAP_FAILED))
- {
- buf->size = total;
- char *wp = buf->msg;
- for (int cnt = 0; cnt < nlist; ++cnt)
- wp = mempcpy (wp, iov[cnt].iov_base, iov[cnt].iov_len);
- *wp = '\0';
-
- /* We have to free the old buffer since the application might
- catch the SIGABRT signal. */
- struct abort_msg_s *old = atomic_exchange_acq (&__abort_msg,
- buf);
- if (old != NULL)
- __munmap (old, old->size);
- }
+ buf->size = total;
+ char *wp = buf->msg;
+ for (int cnt = 0; cnt < nlist; ++cnt)
+ wp = mempcpy (wp, iov[cnt].iov_base, iov[cnt].iov_len);
+ *wp = '\0';
+
+ /* We have to free the old buffer since the application might
+ catch the SIGABRT signal. */
+ struct abort_msg_s *old = atomic_exchange_acq (&__abort_msg,
+ buf);
+ if (old != NULL)
+ __munmap (old, old->size);
}
}
va_end (ap);
- if ((action & do_abort))
- /* Kill the application. */
- abort ();
+ /* Kill the application. */
+ abort ();
}
@@ -161,6 +156,6 @@ __libc_fatal (const char *message)
{
/* The loop is added only to keep gcc happy. */
while (1)
- __libc_message (do_abort, "%s", message);
+ __libc_message ("%s", message);
}
libc_hidden_def (__libc_fatal)