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* signal.c (rb_sigaltstack_size): new. calculate stack size for

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sigsegv handler. enlarge value when x86 or x86_64 on Linux.
  Linux has very small MINSIGSTKSZ size (2048 bytes) and
  our sigsegv routine need 5KiB at least. [Bug #7141]
* internal.h: add declaration of rb_sigaltstack_size().
* vm_core.h: remove ALT_STACK_SIZE definition.

* signal.c (rb_register_sigaltstack): replace ALT_STACK_SIZE with
  rb_sigaltstack_size();
* gc.c (Init_heap): ditto.
* vm.c (th_init): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38409 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
kosaki 2012-12-15 14:20:12 +00:00
parent cbe5f8820b
commit aff9dff46d
6 changed files with 39 additions and 9 deletions
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14
ChangeLog
View file

@ -1,3 +1,17 @@
Sat Dec 15 23:08:56 2012 KOSAKI Motohiro <kosaki.motohiro@gmail.com>
* signal.c (rb_sigaltstack_size): new. calculate stack size for
sigsegv handler. enlarge value when x86 or x86_64 on Linux.
Linux has very small MINSIGSTKSZ size (2048 bytes) and
our sigsegv routine need 5KiB at least. [Bug #7141]
* internal.h: add declaration of rb_sigaltstack_size().
* vm_core.h: remove ALT_STACK_SIZE definition.
* signal.c (rb_register_sigaltstack): replace ALT_STACK_SIZE with
rb_sigaltstack_size();
* gc.c (Init_heap): ditto.
* vm.c (th_init): ditto.
Sat Dec 15 18:24:21 2012 Tadayoshi Funaba <tadf@dotrb.org>
* rational.c (f_round_common): should check overflow.

2
gc.c
View file

@ -574,7 +574,7 @@ init_heap(rb_objspace_t *objspace)
/* altstack of another threads are allocated in another place */
rb_thread_t *th = GET_THREAD();
void *tmp = th->altstack;
th->altstack = malloc(ALT_STACK_SIZE);
th->altstack = malloc(rb_sigaltstack_size());
free(tmp); /* free previously allocated area */
}
#endif

1
internal.h
View file

@ -252,6 +252,7 @@ VALUE rb_reg_check_preprocess(VALUE);
/* signal.c */
int rb_get_next_signal(void);
int rb_sigaltstack_size(void);
/* strftime.c */
#ifdef RUBY_ENCODING_H

23
signal.c
View file

@ -447,6 +447,27 @@ typedef RETSIGTYPE ruby_sigaction_t(int);
#endif
#ifdef USE_SIGALTSTACK
int rb_sigaltstack_size(void)
{
/* XXX: BSD_vfprintf() uses >1500KiB stack and x86-64 need >5KiB stack. */
int size = 8192;
#ifdef MINSIGSTKSZ
if (size < MINSIGSTKSZ)
size = MINSIGSTKSZ;
#endif
#if defined(HAVE_SYSCONF) && defined(_SC_PAGE_SIZE)
{
int pagesize;
pagesize = sysconf(_SC_PAGE_SIZE);
if (size < pagesize)
size = pagesize;
}
#endif
return size;
}
/* alternate stack for SIGSEGV */
void
rb_register_sigaltstack(rb_thread_t *th)
@ -457,7 +478,7 @@ rb_register_sigaltstack(rb_thread_t *th)
rb_bug("rb_register_sigaltstack: th->altstack not initialized\n");
newSS.ss_sp = th->altstack;
newSS.ss_size = ALT_STACK_SIZE;
newSS.ss_size = rb_sigaltstack_size();
newSS.ss_flags = 0;
sigaltstack(&newSS, &oldSS); /* ignore error. */

2
vm.c
View file

@ -1834,7 +1834,7 @@ th_init(rb_thread_t *th, VALUE self)
/* allocate thread stack */
#ifdef USE_SIGALTSTACK
/* altstack of main thread is reallocated in another place */
th->altstack = malloc(ALT_STACK_SIZE);
th->altstack = malloc(rb_sigaltstack_size());
#endif
th->stack_size = RUBY_VM_THREAD_STACK_SIZE;
th->stack = thread_recycle_stack(th->stack_size);

6
vm_core.h
View file

@ -456,12 +456,6 @@ struct rb_unblock_callback {
struct rb_mutex_struct;
#ifdef MINSIGSTKSZ
#define ALT_STACK_SIZE (MINSIGSTKSZ*2)
#else
#define ALT_STACK_SIZE (4*1024)
#endif
struct rb_thread_struct;
typedef struct rb_thread_list_struct{
struct rb_thread_list_struct *next;