Re: [Qemu-devel] [PATCH] oslib: make error handling more reasonable

["Daniel P. Berrange" <berrange@redhat.com>]

On Fri, Feb 10, 2012 at 10:34:13PM +0800, Zhi Yong Wu wrote:
> From: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
> 
> Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
> ---
>  oslib-posix.c |    4 ++--
>  oslib-win32.c |    4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/oslib-posix.c b/oslib-posix.c
> index b6a3c7f..f978d56 100644
> --- a/oslib-posix.c
> +++ b/oslib-posix.c
> @@ -80,7 +80,7 @@ void *qemu_oom_check(void *ptr)
>  {
>      if (ptr == NULL) {
>          fprintf(stderr, "Failed to allocate memory: %s\n", strerror(errno));
> -        abort();
> +        exit(EXIT_FAILURE);

exit() will call any atexit()/on_exit() handlers, as well as trying
to flush I/O streams. Any of these actions may require further
memory allocations, which will likely fail, or worse cause this
code to re-enter itself if an atexit() handler calls qemu_malloc

The only option other than abort(), is to use  _Exit() which
doesn't try to run cleanup handlers.

Daniel
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