From 8a1d02aba9f986ca03d854184cd432ee98bcd179 Mon Sep 17 00:00:00 2001
From: aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Thu, 5 Feb 2009 22:05:49 +0000
Subject: [PATCH] Terminate emulation on memory allocation failure (Avi Kivity)

Memory allocation failures are a very rare condition on virtual-memory
hosts.  They are also very difficult to handle correctly (especially in a
hardware emulation context).  Because of this, it is better to gracefully
terminate emulation rather than executing untested or even unwritten recovery
code paths.

This patch changes the qemu memory allocation routines to terminate emulation
if an allocation failure is encountered.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6526 c046a42c-6fe2-441c-8c8c-71466251a162
---
 qemu-malloc.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/qemu-malloc.c b/qemu-malloc.c
index dc74efed17..1d00f26d00 100644
--- a/qemu-malloc.c
+++ b/qemu-malloc.c
@@ -22,6 +22,14 @@
  * THE SOFTWARE.
  */
 #include "qemu-common.h"
+#include <stdlib.h>
+
+static void *oom_check(void *ptr)
+{
+    if (ptr == NULL)
+        exit(13);
+    return ptr;
+}
 
 void *get_mmap_addr(unsigned long size)
 {
@@ -35,20 +43,18 @@ void qemu_free(void *ptr)
 
 void *qemu_malloc(size_t size)
 {
-    return malloc(size);
+    return oom_check(malloc(size));
 }
 
 void *qemu_realloc(void *ptr, size_t size)
 {
-    return realloc(ptr, size);
+    return oom_check(realloc(ptr, size));
 }
 
 void *qemu_mallocz(size_t size)
 {
     void *ptr;
     ptr = qemu_malloc(size);
-    if (!ptr)
-        return NULL;
     memset(ptr, 0, size);
     return ptr;
 }
@@ -58,8 +64,6 @@ char *qemu_strdup(const char *str)
     char *ptr;
     size_t len = strlen(str);
     ptr = qemu_malloc(len + 1);
-    if (!ptr)
-        return NULL;
     memcpy(ptr, str, len + 1);
     return ptr;
 }