Revert "vm_trace: implement postponed_jobs as st_table"

This reverts commit 5a1dfb04bc2b09fcf8f3427cac72d0ce52a45eb2 (r63451)

And mark the functions as async-signal-safe while we're at it to
prevent future developers from making the same mistake as I did :x

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65316 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 1 deletions

diff --git a/vm_core.h b/vm_core.h
index 61279689e6..818a6f9707 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -630,7 +630,8 @@ typedef struct rb_vm_struct {
     struct st_table *ensure_rollback_table;
 
     /* postponed_job */
-    struct st_table *postponed_jobs;
+    struct rb_postponed_job_struct *postponed_job_buffer;
+    int postponed_job_index;
 
     int src_encoding_index;