YJIT: Fix argument clobbering in some block_arg+rest_param calls (#8647)
Previously, for block argument callsites with some specific argument
count and callee local variable count combinations, YJIT ended up
writing over arguments that are supposed to be collected into a rest
parameter array unmodified.
Detect when clobbering would happen and avoid it. Also, place the block
handler after the stack overflow check, since it writes to new stack
space.
Added by alanwu (Alan Wu) almost 2 years ago
YJIT: Fix argument clobbering in some block_arg+rest_param calls (#8647)
Previously, for block argument callsites with some specific argument
count and callee local variable count combinations, YJIT ended up
writing over arguments that are supposed to be collected into a rest
parameter array unmodified.
Detect when clobbering would happen and avoid it. Also, place the block
handler after the stack overflow check, since it writes to new stack
space.
Reported-by: Takashi Kokubun [email protected]