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authornobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2018-05-07 23:14:07 (GMT)
committernobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2018-05-07 23:14:07 (GMT)
commitcd36bea5684b065827060e07cc3d6e33987d61c1 (patch)
treec06ac368eafc6516075e75d9532a5a692083ad24 /cont.c
parent6c62356e5a7a48aea74b06573ba56c5c3e333d80 (diff)
cont.c: refined error message
* cont.c (fiber_machine_stack_alloc): refined the error message on failure at setting a guard page. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63351 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'cont.c')
-rw-r--r--cont.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/cont.c b/cont.c
index a748b4e..096873f 100644
--- a/cont.c
+++ b/cont.c
@@ -769,6 +769,8 @@ fiber_entry(void *arg)
#define FIBER_STACK_FLAGS (MAP_PRIVATE | MAP_ANON)
#endif
+#define ERRNOMSG strerror(errno)
+
static char*
fiber_machine_stack_alloc(size_t size)
{
@@ -793,13 +795,13 @@ fiber_machine_stack_alloc(size_t size)
errno = 0;
ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, FIBER_STACK_FLAGS, -1, 0);
if (ptr == MAP_FAILED) {
- rb_raise(rb_eFiberError, "can't alloc machine stack to fiber: %s", strerror(errno));
+ rb_raise(rb_eFiberError, "can't alloc machine stack to fiber: %s", ERRNOMSG);
}
/* guard page setup */
page = ptr + STACK_DIR_UPPER(size - RB_PAGE_SIZE, 0);
if (mprotect(page, RB_PAGE_SIZE, PROT_NONE) < 0) {
- rb_raise(rb_eFiberError, "mprotect failed");
+ rb_raise(rb_eFiberError, "can't set a guard page: %s", ERRNOMSG);
}
}