Currently PcDescCache (32 bytes: PcDesc* _pc_descs[4]) is allocated in `nmethod` header.
Investigate possibility to move it to C heap similar to ExceptionCache to reduce size of `nmethod` header and remove WXWrite transition when we update the cache in `PcDescCache::add_pc_desc()`
Main concern is performance because we will add one pointer load to each query.
Investigate possibility to move it to C heap similar to ExceptionCache to reduce size of `nmethod` header and remove WXWrite transition when we update the cache in `PcDescCache::add_pc_desc()`
Main concern is performance because we will add one pointer load to each query.
- relates to
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JDK-8345784 SIGSEGV on macOS in PcDescContainer::find_pc_desc_internal
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- Closed
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JDK-8331087 Move immutable nmethod data from CodeCache
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- Resolved
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- Closed
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- Resolved
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- Resolved
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(2 links to)