Guard callinfo
Callinfo was being written in to an array and the GC would not see the
reference on the stack. `new_insn_send` creates a new callinfo object,
then it calls `new_insn_core`. `new_insn_core` allocates a new INSN
linked list item, which can end up calling `xmalloc` which will trigger
a GC:
https://github.com/ruby/ruby/blob/70cd351c7c71c48ee18d7c01e851a89614086f8f/compile.c#L968-L969
Since the callinfo object isn't on the stack, the GC won't see it, and
it can get collected. This patch just refactors `new_insn_send` to keep
the object on the stack
Co-authored-by: John Hawthorn <john@hawthorn.email>
---
compile.c | 7 +++++--
test/ruby/test_gc.rb | 10 ++++++++++
2 files changed, 15 insertions(+), 2 deletions(-)
Fix WB for callinfo
The WB for callinfo needs to be executed *after* the reference is
written. Otherwise we get a WB miss.
---
compile.c | 1 +
1 file changed, 1 insertion(+)
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