* thread.c (double2timeval): convert the infinity to TIME_MAX to avoid

  SEGV by Thread.new {}.join(Float::INFINITY) on
  Debian GNU/Linux (amd64).



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39939 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 3 deletions

diff --git a/thread.c b/thread.c
index e9fe8a7ddf..189a563c44 100644
--- a/thread.c
+++ b/thread.c
@@ -73,6 +73,9 @@
 #define THREAD_DEBUG 0
 #endif
 
+#define TIMET_MAX (~(time_t)0 <= 0 ? (time_t)((~(unsigned_time_t)0) >> 1) : (time_t)(~(unsigned_time_t)0))
+#define TIMET_MIN (~(time_t)0 <= 0 ? (time_t)(((unsigned_time_t)1) << (sizeof(time_t) * CHAR_BIT - 1)) : (time_t)0)
+
 VALUE rb_cMutex;
 VALUE rb_cThreadShield;
 
@@ -916,6 +919,12 @@ double2timeval(double d)
 {
     struct timeval time;
 
+    if (isinf(d)) {
+        time.tv_sec = TIMET_MAX;
+        time.tv_usec = 0;
+        return time;
+    }
+
     time.tv_sec = (int)d;
     time.tv_usec = (int)((d - (int)d) * 1e6);
     if (time.tv_usec < 0) {
@@ -3551,9 +3560,6 @@ rb_thread_fd_select(int max, rb_fdset_t * read, rb_fdset_t * write, rb_fdset_t *
 #define POLLOUT_SET (POLLWRBAND | POLLWRNORM | POLLOUT | POLLERR)
 #define POLLEX_SET (POLLPRI)
 
-#define TIMET_MAX (~(time_t)0 <= 0 ? (time_t)((~(unsigned_time_t)0) >> 1) : (time_t)(~(unsigned_time_t)0))
-#define TIMET_MIN (~(time_t)0 <= 0 ? (time_t)(((unsigned_time_t)1) << (sizeof(time_t) * CHAR_BIT - 1)) : (time_t)0)
-
 #ifndef HAVE_PPOLL
 /* TODO: don't ignore sigmask */
 int