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 +1,106 @@
+$ javap -c -p -v demo.Generated     (the class GenerateDemo wrote; 25.0.5+8-LTS)
+public class demo.Generated
+  minor version: 0
+  major version: 69
+  flags: (0x0021) ACC_PUBLIC, ACC_SUPER
+  this_class: #2                          // demo/Generated
+  super_class: #6                         // java/lang/Object
+  interfaces: 0, fields: 0, methods: 5, attributes: 0
+Constant pool:
+   #1 = Utf8               demo/Generated
+   #2 = Class              #1             // demo/Generated
+   #3 = Utf8               <init>
+   #4 = Utf8               ()V
+   #5 = Utf8               java/lang/Object
+   #6 = Class              #5             // java/lang/Object
+   #7 = NameAndType        #3:#4          // "<init>":()V
+   #8 = Methodref          #6.#7          // java/lang/Object."<init>":()V
+   #9 = Utf8               add
+  #10 = Utf8               (II)I
+  #11 = Utf8               hello
+  #12 = Utf8               ()Ljava/lang/String;
+  #13 = Utf8               Hello from generated bytecode
+  #14 = String             #13            // Hello from generated bytecode
+  #15 = Utf8               sumTo
+  #16 = Utf8               (I)J
+  #17 = Utf8               classify
+  #18 = Utf8               (I)Ljava/lang/String;
+  #19 = Utf8               negative
+  #20 = String             #19            // negative
+  #21 = Utf8               non-negative
+  #22 = String             #21            // non-negative
+  #23 = Utf8               Code
+  #24 = Utf8               StackMapTable
+  #25 = Utf8               java/lang/String
+  #26 = Class              #25            // java/lang/String
+{
+  public demo.Generated();
+    descriptor: ()V
+    flags: (0x0001) ACC_PUBLIC
+    Code:
+      stack=1, locals=1, args_size=1
+         0: aload_0
+         1: invokespecial #8                  // Method java/lang/Object."<init>":()V
+         4: return
+
+  public static int add(int, int);
+    descriptor: (II)I
+    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
+    Code:
+      stack=2, locals=2, args_size=2
+         0: iload_0
+         1: iload_1
+         2: iadd
+         3: ireturn
+
+  public static java.lang.String hello();
+    descriptor: ()Ljava/lang/String;
+    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
+    Code:
+      stack=1, locals=0, args_size=0
+         0: ldc           #14                 // String Hello from generated bytecode
+         2: areturn
+
+  public static long sumTo(int);
+    descriptor: (I)J
+    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
+    Code:
+      stack=4, locals=4, args_size=1
+         0: lconst_0
+         1: lstore_1
+         2: iconst_1
+         3: istore_3
+         4: iload_3
+         5: iload_0
+         6: if_icmpgt     20
+         9: lload_1
+        10: iload_3
+        11: i2l
+        12: ladd
+        13: lstore_1
+        14: iinc          3, 1
+        17: goto          4
+        20: lload_1
+        21: lreturn
+      StackMapTable: number_of_entries = 2
+        frame_type = 253 /* append */
+          offset_delta = 4
+          locals = [ long, int ]
+        frame_type = 15 /* same */
+
+  public static java.lang.String classify(int);
+    descriptor: (I)Ljava/lang/String;
+    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
+    Code:
+      stack=1, locals=1, args_size=1
+         0: iload_0
+         1: ifge          9
+         4: ldc           #20                 // String negative
+         6: goto          11
+         9: ldc           #22                 // String non-negative
+        11: areturn
+      StackMapTable: number_of_entries = 2
+        frame_type = 9 /* same */
+        frame_type = 65 /* same_locals_1_stack_item */
+          stack = [ class java/lang/String ]
+}