From 5648976c3c207b0f750a5ce26ba4862c63f6a626 Mon Sep 17 00:00:00 2001 From: 卜部昌平 Date: Wed, 10 Jun 2020 10:19:48 +0900 Subject: vm_call_method: avoid marking on-stack object This callcache is on stack, must not be GCed. However its contents are copied from other materials, which can be an ordinal object. Should set a flag to make sure it is properly skipped by the GC. --- vm_insnhelper.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/vm_insnhelper.c b/vm_insnhelper.c index 65bebd34e8..611739e957 100644 --- a/vm_insnhelper.c +++ b/vm_insnhelper.c @@ -3183,7 +3183,8 @@ vm_call_method(rb_execution_context_t *ec, rb_control_frame_t *cfp, struct rb_ca else { /* caching method info to dummy cc */ VM_ASSERT(vm_cc_cme(cc) != NULL); - const struct rb_callcache cc_on_stack = *cc; + struct rb_callcache cc_on_stack = *cc; + FL_SET_RAW((VALUE)&cc_on_stack, VM_CALLCACHE_UNMARKABLE); struct rb_call_data dummy = { .ci = ci, .cc = &cc_on_stack, -- cgit v1.2.3