Move immutable nmethod's data from CodeCache to C heap. It includes `dependencies, nul_chk_table, handler_table, scopes_pcs, scopes_data, speculations, jvmci_data`. It amounts for about 30% (optimized VM) of space in CodeCache.
Use HotSpot's `os::malloc()` to allocate memory in C heap for immutable nmethod's data. Bail out compilation if allocation failed. Shuffle fields order and change some fields size from 4 to 2 bytes to avoid nmethod's header size increase. Tested tier1-5, stress,xcomp ------------- Commit messages: - 8331087: Move immutable nmethod data from CodeCache Changes: https://git.openjdk.org/jdk/pull/18984/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18984&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8331087 Stats: 290 lines in 7 files changed: 149 ins; 31 del; 110 mod Patch: https://git.openjdk.org/jdk/pull/18984.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/18984/head:pull/18984 PR: https://git.openjdk.org/jdk/pull/18984
