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asmhatre
2026-11-06 21:43:48 +05:30
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@@ -75,6 +75,7 @@ These modules keep only sources, a `run.sh` and their transcripts (`output/`). T
| [`kdf/`](kdf) | Key Derivation Function API in Java (JEP 510): HKDF Explained with Real Examples | `javax.crypto.KDF` final in JDK 25, `HKDF-SHA256/384/512`, extract vs expand, RFC 5869 vectors asserted, a hand-written HKDF and 300 generated cases compared with Python `cryptography` and `openssl kdf`, per-tenant keys with length-prefixed `info`, and the mistakes reproduced (same `info`, ambiguous concatenation, PIN through HKDF vs PBKDF2) |
| [`classfile-api/`](classfile-api) | The Java ClassFile API (JEP 484): Read, Generate and Transform Bytecode Without ASM | `java.lang.classfile` final since JDK 24: `parse` and `ClassModel` traversal, `ClassFile.build` with `defineClass` and `defineHiddenClass`, five deliberately broken classes (including swapped exception-table labels that `verify()` misses), timing inserted with `ClassTransform`/`MethodTransform`/`CodeTransform`, the same three jobs in ASM 9.11.1 asserted equal, class-file version limits, a JDK 24/25/26 API diff and a look inside `spring-core` 7.0.10 |
| [`jextract/`](jextract) | Calling C from Java with jextract and the FFM API: A Real Library, No JNI | jextract (early-access build for JDK 25) bindings for SQLite 3.45.1, the four arena kinds used wrongly on purpose, `C_POINTER` vs `ADDRESS` (zero-length pointers, and a `SIGSEGV` from `getString` on a NULL pointer), `sqlite3_open` out-parameter, return codes to exceptions, a `sqlite3_exec` upcall (and the JVM exit when it throws), the JDK 25 native-access warning and `--illegal-native-access=deny`, and a JMH comparison of FFM, hand-written JNI and plain Java |
| [`unsafe-migration/`](unsafe-migration) | sun.misc.Unsafe Memory Access Is Going Away: Find and Fix It in Your Dependencies (JEP 471 / 498) | what `--sun-misc-unsafe-memory-access` allow/warn/debug/deny do on JDK 25 (and 21, 26, 27), `javac` removal warnings, jdeps and a bytecode scan of 17 real jars, Netty and Guava at run time, a CAS field to `VarHandle`, an off-heap array to `MemorySegment`, a before/after equivalence check |
## Captured output (`docs/output/`)