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some pointers to keep those Arc struct alive, so Drop doesnt get called

impl Drop for VM

res; op res, y -> res. Instead, I used to generate: op x, y -> x; mov x
-> res

(for easy debugging)

fail)

internally they do nothing (gc doesnt move in zebu atm)

need to put HeapDump as data section in asm

info

Currently a treadmill for the whole space will be created, this takes huge amount of time
and even if treadmill space is not used, it needs to be traversed in every gc. Going to
change this tomorrow

make tracing able to trace freelist space (may have degraded
performance, gonna need to tune gc performance later)

1. see vm/vm_options.rs for usage and default values
2. added mu_fastimpl_new_with_opts under vm/api/api_impl/muvm.rs

(for blocks created during instruction selection)

FIXME: GC settings such as heap size, n_gcthreads, should be properly serialized