diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | thread_pthread.c | 37 |
2 files changed, 44 insertions, 0 deletions
@@ -1,3 +1,10 @@ +Sat Jan 31 12:06:23 2015 Scott Francis <scott.francis@shopify.com> + + * thread_pthread.c (reserve_stack): fix intermittent SIGBUS on + Linux, by reserving the stack virtual address space at process + start up so that it will not clash with the heap space. + [Fix GH-822] + Fri Jan 30 17:28:29 2015 gogotanaka <mail@tanakakazuki.com> * math.c (num2dbl_with_to_f): make faster when Bignum passed by diff --git a/thread_pthread.c b/thread_pthread.c index 3ef316c639..20dc03cc14 100644 --- a/thread_pthread.c +++ b/thread_pthread.c @@ -653,6 +653,42 @@ space_size(size_t stack_size) } } +#ifdef __linux__ +static __attribute__((noinline)) void +reserve_stack(volatile char *limit, size_t size) +{ +# ifdef C_ALLOCA +# error needs alloca() +# endif + struct rlimit rl; + volatile char buf[0x100]; + STACK_GROW_DIR_DETECTION; + + if (!getrlimit(RLIMIT_STACK, &rl) && rl.rlim_cur == RLIM_INFINITY) + return; + + size -= sizeof(buf); /* margin */ + if (IS_STACK_DIR_UPPER()) { + const volatile char *end = buf + sizeof(buf); + limit += size; + if (limit > end) { + size = limit - end; + limit = alloca(size); + limit[size-1] = 0; + } + } + else { + limit -= size; + if (buf > limit) { + limit = alloca(buf - limit); + limit[0] = 0; + } + } +} +#else +# define reserve_stack(limit, size) ((void)(limit), (void)(size)) +#endif + #undef ruby_init_stack /* Set stack bottom of Ruby implementation. * @@ -674,6 +710,7 @@ ruby_init_stack(volatile VALUE *addr if (get_main_stack(&stackaddr, &size) == 0) { native_main_thread.stack_maxsize = size; native_main_thread.stack_start = stackaddr; + reserve_stack(stackaddr, size); return; } } |