thread_sync.c (condvar_ptr): reset fork_gen after forking

normal · tenderlove · commit d2986e0dc41b · 2018-07-24T11:06:00.000-07:00
Otherwise the condition variable waiter list will always
be empty, which is wrong :x

[Bug #14725] [Bug #14634]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63309 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
diff --git a/thread_sync.c b/thread_sync.c
@@ -1295,6 +1295,7 @@ condvar_ptr(VALUE self)
 
     /* forked children can't reach into parent thread stacks */
     if (cv->fork_gen != fork_gen) {
+        cv->fork_gen = fork_gen;
         list_head_init(&cv->waitq);
     }
 

Original file line number	Diff line number	Diff line change
`@@ -1295,6 +1295,7 @@ condvar_ptr(VALUE self)`
`1295`	`1295`
`1296`	`1296`	`/* forked children can't reach into parent thread stacks */`
`1297`	`1297`	`if (cv->fork_gen != fork_gen) {`
	`1298`	`+ cv->fork_gen = fork_gen;`
`1298`	`1299`	`list_head_init(&cv->waitq);`
`1299`	`1300`	`}`
`1300`	`1301`