diff options
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/linux/libc_fatal.c | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/sysdeps/unix/sysv/linux/libc_fatal.c b/sysdeps/unix/sysv/linux/libc_fatal.c index 7287f4ef6c..e1b4c8d314 100644 --- a/sysdeps/unix/sysv/linux/libc_fatal.c +++ b/sysdeps/unix/sysv/linux/libc_fatal.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1993-1995,1997,2000,2002-2005,2009 +/* Copyright (C) 1993-1995,1997,2000,2002-2005,2009,2011 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -20,6 +20,7 @@ #include <atomic.h> #include <errno.h> #include <fcntl.h> +#include <ldsodefs.h> #include <paths.h> #include <stdarg.h> #include <stdbool.h> @@ -28,6 +29,7 @@ #include <string.h> #include <sysdep.h> #include <unistd.h> +#include <sys/mman.h> #include <sys/syslog.h> #include <execinfo.h> @@ -134,18 +136,28 @@ __libc_message (int do_abort, const char *fmt, ...) if (cnt == total) written = true; - char *buf = do_abort ? malloc (total + 1) : NULL; - if (buf != NULL) + if (do_abort) { - char *wp = buf; - 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. */ - char *old = atomic_exchange_acq (&__abort_msg, buf); - free (old); + 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 (__builtin_expect (buf != MAP_FAILED, 1)) + { + 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); + } } } |