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author卜部昌平 <shyouhei@ruby-lang.org>2020-06-10 10:19:48 +0900
committer卜部昌平 <shyouhei@ruby-lang.org>2020-06-10 10:22:39 +0900
commit5648976c3c207b0f750a5ce26ba4862c63f6a626 (patch)
treed82bf56dd8ddd8b1db725f4a30810661eb6121f9
parent8bee9e5cd5e806f94fa727fa58a85effae908c57 (diff)
downloadruby-5648976c3c207b0f750a5ce26ba4862c63f6a626.tar.gz
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.
-rw-r--r--vm_insnhelper.c3
1 files changed, 2 insertions, 1 deletions
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,