Add classfile-api module: java.lang.classfile (JEP 484) parse, generate, transform with timing instrumentation, ASM 9.11.1 comparison, version limits, JDK 24/25/26 API diff

Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_017ic4b4VQVEJWetTT1dYzyJ
2026-10-29 04:14:57 +00:00
parent eca73ad544
commit 41101bea40
37 changed files with 1763 additions and 0 deletions
@@ -0,0 +1,72 @@
+$ java -cp classes:asm-9.11.1.jar... demo.ParseDemo      (25.0.5+8-LTS)
+== header ==
+bytes            : 1488
+this             : demo/Target
+super            : java/lang/Object
+version          : 69.0  (ClassFile.JAVA_25_VERSION = 69)
+flags            : public,super 
+constant pool    : 69 slots
+
+== fields ==
+final,private name Ljava/lang/String;
+private calls I
+
+== methods ==
+public <init>(Ljava/lang/String;)V
+public,static fib(I)I
+public,static sumTo(I)J
+public greet(Ljava/lang/String;)Ljava/lang/String;
+public pause(J)V
+public,static boom()V
+public,static explode([I)I
+public calls()I
+
+== class elements, in file order (the model is a stream of elements) ==
+  AccessFlags
+  ClassFileVersion
+  Superclass
+  Interfaces
+  field  name
+  field  calls
+  method <init>
+  method fib
+  method sumTo
+  method greet
+  method pause
+  method boom
+  method explode
+  method calls
+  SourceFile=Target.java
+  BoundInnerClassesAttribute
+
+== fib(I)I, instruction by instruction ==
+  ILOAD_0
+  ICONST_2
+  IF_ICMPGE
+  ILOAD_0
+  GOTO
+  ILOAD_0
+  ICONST_1
+  ISUB
+  INVOKESTATIC  demo/Target.fib(I)I
+  ILOAD_0
+  ICONST_2
+  ISUB
+  INVOKESTATIC  demo/Target.fib(I)I
+  IADD
+  IRETURN
+
+== invoke targets in the whole class ==
+  2 x demo/Target.fib
+  1 x indy:makeConcatWithConstants
+  1 x java/lang/IllegalStateException.<init>
+  1 x java/lang/Object.<init>
+  1 x java/lang/Thread.sleep
+
+== a JDK class from the runtime image: java.lang.String ==
+bytes 50116, major 69, methods 171, fields 11, interfaces 5
+PASS Target.class is class-file version 69 (compiled with --release 25)
+PASS Target has 8 methods (constructor + 7)
+PASS fib calls itself twice
+PASS greet() uses invokedynamic string concatenation
+exit=0