• Jakob Kummerow's avatar
    [bigint] Encapsulate internals in MutableBigInt · 977da550
    Jakob Kummerow authored
    This CL creates the invariant that the BigInt class treats
    BigInt objects as immutable. Writing to new BigInt objects
    as part of their construction is done by the MutableBigInt
    helper class, which in turn is hidden as an implementation
    detail in bigint.cc.
    As a side effect, this refactoring enforces right-trimming
    checks for all newly created BigInts, and ensures that all
    BigInt allocations possibly exceeding kMaxLength check for
    this case and throw a RangeError instead of crashing.
    
    Bug: v8:6791
    Tbr: mlippautz@chromium.org
    Change-Id: Id239746108e6b076b47a03ba37462001eb501507
    Reviewed-on: https://chromium-review.googlesource.com/742329
    Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
    Reviewed-by: 's avatarGeorg Neis <neis@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#49462}
    977da550
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