JDK-8243209 : Generate JVMFlag hashtable with constexpr
- Type: Enhancement
- Component: hotspot
- Sub-Component: runtime
- Affected Version: 15
- Priority: P4
- Status: Resolved
- Resolution: Duplicate
- Submitted: 2020-04-20
- Updated: 2020-09-02
- Resolved: 2020-08-23
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| JDK 16 |
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16Resolved  |
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Description
Currently when a VM parameter such as -XX:+UseCompressedOops is processed by arguments.cpp, we have to linearly search for the JVMFlag structure corresponding to this flag. We should build a hashtable so we can search the JVMFlags quickly. To avoid start-up cost, the hashtable should be built with constexpr. For a prototype, see http://cr.openjdk.java.net/~iklam/design/jvm_flags_overhaul/design-10/ at build time so we can quickly search for the flag.
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