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[Emacs-diffs] Changes to emacs/src/alloc.c
From: |
Jan Djärv |
Subject: |
[Emacs-diffs] Changes to emacs/src/alloc.c |
Date: |
Sat, 25 Dec 2004 05:44:38 -0500 |
Index: emacs/src/alloc.c
diff -c emacs/src/alloc.c:1.358 emacs/src/alloc.c:1.359
*** emacs/src/alloc.c:1.358 Sat Dec 25 10:13:57 2004
--- emacs/src/alloc.c Sat Dec 25 10:31:36 2004
***************
*** 601,622 ****
((unsigned)(ptr[-4]) << 24))
! /* The call depth in overrun_check functions. Realloc may call both malloc
! and free. If realloc calls malloc, this may happen:
! overrun_check_realloc()
! -> malloc -> (via hook)_-> emacs_blocked_malloc
! -> overrun_check_malloc
! call malloc (hooks are NULL, so real malloc is called).
! malloc returns 10000.
! add overhead, return 10016.
! <- (back in overrun_check_realloc)
add overhead again, return 10032
(time passes).
! overrun_check_free(10032)
! decrease overhed
! free(10016) <- crash, because 10000 is the original pointer. */
static int check_depth;
--- 601,624 ----
((unsigned)(ptr[-4]) << 24))
! /* The call depth in overrun_check functions. For example, this might happen:
! xmalloc()
! overrun_check_malloc()
! -> malloc -> (via hook)_-> emacs_blocked_malloc
! -> overrun_check_malloc
! call malloc (hooks are NULL, so real malloc is called).
! malloc returns 10000.
! add overhead, return 10016.
! <- (back in overrun_check_malloc)
add overhead again, return 10032
+ xmalloc returns 10032.
(time passes).
! xfree(10032)
! overrun_check_free(10032)
! decrease overhed
! free(10016) <- crash, because 10000 is the original pointer. */
static int check_depth;
- [Emacs-diffs] Changes to emacs/src/alloc.c, Kim F . Storm, 2004/12/01
- [Emacs-diffs] Changes to emacs/src/alloc.c, Jan Djärv, 2004/12/07
- [Emacs-diffs] Changes to emacs/src/alloc.c, Jan Djärv, 2004/12/07
- [Emacs-diffs] Changes to emacs/src/alloc.c, Jan Djärv, 2004/12/15
- [Emacs-diffs] Changes to emacs/src/alloc.c, Richard M . Stallman, 2004/12/21
- [Emacs-diffs] Changes to emacs/src/alloc.c,
Jan Djärv <=
- [Emacs-diffs] Changes to emacs/src/alloc.c, Jan Djärv, 2004/12/25