[8u] RFR + RFA 8211926: Catastrophic size_t underflow in BitMap::*_large methods

[Hohensee, Paul]

The 8u patch looks good to me, as in, inspection says it does the same thing in 8u as in 11u.

Paul

On 2/6/19, 8:41 AM, "jdk8u-dev on behalf of Aleksey Shipilev" <jdk8u-dev-bounces at openjdk.java.net on behalf of shade at redhat.com> wrote:

    Please review and approve the backport of catastrophic underflow fix in BitMap:
    
      Original Bug:
          URL: https://bugs.openjdk.java.net/browse/JDK-8211926
          Reporter: Aleksey Shipilev
          Assignee: Aleksey Shipilev
          Priority: P4
          Components: hotspot
    
      Original Fix:
            12: JDK-8211926, http://hg.openjdk.java.net/jdk/jdk/rev/e5534cc91a10, 88 day(s) ago
    
      Backports and Forwardports:
            11: 11.0.3, JDK-8214860, http://hg.openjdk.java.net/jdk-updates/jdk11u/rev/6c90d1d1a03b, 63
    day(s) ago
             8: MISSING
    
    8u fix does not apply cleanly, because Bitmap is cleaned up a bit in subsequent releases. There is
    also no support for gtest, which means we cannot backport the relevant regression test. Instead, we
    have to rely on assert to fire if code is broken. 8u webrev:
      http://cr.openjdk.java.net/~shade/8211926/webrev.8u.01/
    
    Testing: Linux x86_64 build and all jtreg tests (with some unrelated failures)
    
    Thanks,
    -Aleksey