RFR: 8254265: s390 and linux 32 bit builds broken

[Coleen Phillimore]

On Thu, 8 Oct 2020 19:29:49 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> JDK-8253717 missed 2 ocurrances of JavaThread::stack_guard_zone_size() which was moved to class StackOverflow.
> 
> I just verified s390 build. Can anybody check linux 32 bit?

Changes requested by coleenp (Reviewer).

src/hotspot/os_cpu/linux_x86/os_linux_x86.cpp line 863:

> 861:    */
> 862:   char* hint = (char*)(Linux::initial_thread_stack_bottom() -
> 863:                        (StackOverflow::stack_guard_zone_size() + page_size));

Lines 841 and 842 also need to be fixed.  Still testing.

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PR: https://git.openjdk.java.net/jdk/pull/568