introduce __uc_malloc, so that users can intercept libc internal OOM.

1 files changed, 7 insertions, 0 deletions

diff --git a/include/malloc.h b/include/malloc.h
index 354f153d4..05eac9fdd 100644
--- a/include/malloc.h
+++ b/include/malloc.h
@@ -183,6 +183,13 @@ extern int mallopt __MALLOC_P ((int __param, int __val));
 
 #endif /* __MALLOC_STANDARD__ */
 
+/* uClibc may use malloc internally in situations where user can not be
+ * notified about out-of-memory condition. In this situation uClibc will
+ * call __uc_malloc_failed if it is non-NULL, and retry allocation
+ * if it returns. If __uc_malloc_failed is NULL, uclubc will _exit(1).
+ * NB: do not use stdio in __uc_malloc_failed handler! */
+extern void *__uc_malloc(size_t size);
+extern void (*__uc_malloc_failed)(size_t size);
 
 #ifdef __cplusplus
 } /* end of extern "C" */