mjit.c: disable calling JIT-ed code

when TracePoint is enabled. We're cancelling JIT-ed code execution AFTER
each instruction, but there is no guard before the first insn of method.

To prevent spoiling performance, I don't want to modify the JIT-ed code
to fix this. So this commit replaces `mjit_enabled` check with `mjit_call_p`
check.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63734 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/mjit.c b/mjit.c
index b760691459..5c6cf47cc7 100644
--- a/mjit.c
+++ b/mjit.c
@@ -171,6 +171,9 @@ struct rb_mjit_unit_list {
 
 /* TRUE if MJIT is enabled.  */
 int mjit_enabled = FALSE;
+/* TRUE if JIT-ed code should be called. When `ruby_vm_event_enabled_flags & ISEQ_TRACE_EVENTS`
+   and `mjit_call_p == FALSE`, any JIT-ed code execution is cancelled as soon as possible. */
+int mjit_call_p = FALSE;
 
 /* Priority queue of iseqs waiting for JIT compilation.
    This variable is a pointer to head unit of the queue. */
@@ -1410,6 +1413,7 @@ mjit_init(struct mjit_options *opts)
 
     mjit_opts = *opts;
     mjit_enabled = TRUE;
+    mjit_call_p = TRUE;
 
     /* Normalize options */
     if (mjit_opts.min_calls == 0)
@@ -1549,6 +1553,7 @@ mjit_finish(void)
     xfree(pch_file); pch_file = NULL;
     xfree(header_file); header_file = NULL;
 
+    mjit_call_p = FALSE;
     free_list(&unit_queue);
     free_list(&active_units);
     finish_conts();