use unconditional branch to stack overflow thunk on ARM64 #400
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On ARM64, conditional branches to immediate offsets can span no more than 2^19 instructions. In the case of the stack overflow check, which wants to do a conditional branch from every non-leaf method to a handler, this can be a problem, especially when compiled code grows large as with a bootimage=true build against the OpenJDK class library. Therefore, we use an unconditional branch to reach the handler on this platform.
joshuawarner32
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Jan 21, 2015
use unconditional branch to stack overflow thunk on ARM64
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On ARM64, conditional branches to immediate offsets can span no more
than 2^19 instructions. In the case of the stack overflow check,
which wants to do a conditional branch from every non-leaf method to a
handler, this can be a problem, especially when compiled code grows
large as with a bootimage=true build against the OpenJDK class
library. Therefore, we use an unconditional branch to reach the
handler on this platform.