Bug ID: JDK-8154379 MIN_STACK_SHADOW_PAGES should equal DEFAULT_STACK_SHADOW

JDK-8154379 : MIN_STACK_SHADOW_PAGES should equal DEFAULT_STACK_SHADOW_PAGES on aarch64

Type: Bug
Component: hotspot
Sub-Component: runtime
Affected Version: 9

Priority: P3
Status: Resolved
Resolution: Fixed
CPU: arm

Submitted: 2016-04-15
Updated: 2016-05-26
Resolved: 2016-04-25

Versions (Unresolved/Resolved/Fixed)

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Resolved: Release in which this issue/RFE has been resolved.
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JDK 9
9 b120Fixed

Related Reports

Relates :	JDK-8078556 - Runtime: implement ranges (optionally constraints) for those flags that have them missing
Relates :	JDK-8140582 - aarch64: jvm fails to initialise after 8078556
Relates :	JDK-8139864 - Improve handling of stack protection zones.

Description

After the fix for JDK-8139864, the fixes for JDK-8140582 and JDK-8143153 are no longer needed. The following can once again be used for MIN_STACK_SHADOW_PAGES:

#define MIN_STACK_SHADOW_PAGES DEFAULT_STACK_SHADOW_PAGES

Not that this is also a correctness issue. By having MIN_STACK_SHADOW_PAGES be less than DEFAULT_STACK_SHADOW_PAGES as it currently is, there is the potential for the user to set StackShadowPages to a size that will result in overwriting the end of the stack.