8370500: Change windows x64 implementation of os::current_stack_pointer()

[fisk]

The current implementation of os::current_stack_pointer() on windows x64 uses a code stub to read the stack pointer. This means that os::current_stack_pointer() may not be called early on in the bootstrapping. This prevents unhandled oops from being enabled early on.

However, there is an MSVC intrinsic that provides the same functionality without the need to use stubs: _AddressOfReturnAddress() from intrin.h
By changing this implementation on windows x64, we should be able to call os::current_stack_pointer() early on as it is seemingly the only implementation with such a bootstrapping dependency.

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Issue

• JDK-8370500: Change windows x64 implementation of os::current_stack_pointer() (Enhancement - P4)

Reviewers

• Axel Boldt-Christmas (@xmas92 - Reviewer)

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8370500: Change windows x64 implementation of os::current_stack_pointer()

Reviewed-by: aboldtch

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At the time when this comment was updated there had been 73 new commits pushed to the master branch:

• 87645af: 8370389: JavaFrameAnchor on s390 has unnecessary barriers
• 5862358: 8370013: Refactor Double.toHexString to eliminate regex and StringBuilder
• d720a84: 8343220: Add test cases to AppContentTest jpackage test
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[mlbridge]

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[xmas92]

Sounds resonable.