[jdk15u-dev] RFR: 8257794: Zero: assert(istate->_stack_limit == istate->_thread->last_Java_sp() + 1) failed: wrong on Linux/x86_32

[Andrew John Hughes]

Hi all,

This pull request contains a backport of commit [df55ecd8](https://github.com/openjdk/jdk/commit/df55ecd83c70e8962e9037671cd13b104d3e5620) from the [openjdk/jdk](https://git.openjdk.java.net/jdk) repository.

The commit being backported was authored by Jie Fu on 9 Dec 2020 and was reviewed by Aleksey Shipilev.

The fix has already been backported to 11u so it makes sense to also fix it in 15u. This unbreaks the slowdebug Zero build on x86_32.

Thanks!

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Commit messages:
 - Backport df55ecd83c70e8962e9037671cd13b104d3e5620

Changes: https://git.openjdk.java.net/jdk15u-dev/pull/194/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=194&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8257794
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk15u-dev/pull/194.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk15u-dev pull/194/head:pull/194

PR: https://git.openjdk.java.net/jdk15u-dev/pull/194