diff options
Diffstat (limited to 'src/sysdep.c')
| -rw-r--r-- | src/sysdep.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/sysdep.c b/src/sysdep.c index b2aecc0ddac..1f7f02cb003 100644 --- a/src/sysdep.c +++ b/src/sysdep.c @@ -1792,7 +1792,15 @@ handle_arith_signal (int sig) /* Alternate stack used by SIGSEGV handler below. */ -static unsigned char sigsegv_stack[SIGSTKSZ]; +/* Storage for the alternate signal stack. + 64 KiB is not too large for Emacs, and is large enough + for all known platforms. Smaller sizes may run into trouble. + For example, libsigsegv 2.6 through 2.8 have a bug where some + architectures use more than the Linux default of an 8 KiB alternate + stack when deciding if a fault was caused by stack overflow. */ +static max_align_t sigsegv_stack[(64 * 1024 + + sizeof (max_align_t) - 1) + / sizeof (max_align_t)]; /* Return true if SIGINFO indicates a stack overflow. */ |