Upgrade to ASM master

spring-core/src/main/java/org/springframework/asm/ClassReader.java

@@ -313,7 +313,7 @@ public class ClassReader {
     if (inputStream == null) {
       throw new IOException("Class not found");
     }
-    int bufferSize = calculateBufferSize(inputStream);
+    int bufferSize = computeBufferSize(inputStream);
     try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
       byte[] data = new byte[bufferSize];
       int bytesRead;
@@ -336,13 +336,12 @@ public class ClassReader {
     }
   }
 
-  private static int calculateBufferSize(final InputStream inputStream) throws IOException {
+  private static int computeBufferSize(final InputStream inputStream) throws IOException {
     int expectedLength = inputStream.available();
     /*
-     * Some implementations can return 0 while holding available data
+     * Some implementations can return 0 while holding available data (e.g. new
-     * (e.g. new FileInputStream("/proc/a_file"))
+     * FileInputStream("/proc/a_file")). Also in some pathological cases a very small number might
-     * Also in some pathological cases a very small number might be returned,
+     * be returned, and in this case we use a default size.
-     * and in this case we use default size
      */
     if (expectedLength < 256) {
       return INPUT_STREAM_DATA_CHUNK_SIZE;

spring-core/src/main/java/org/springframework/asm/ClassWriter.java

@@ -65,6 +65,12 @@ public class ClassWriter extends ClassVisitor {
    */
   public static final int COMPUTE_FRAMES = 2;
 
+  /**
+   * The flags passed to the constructor. Must be zero or more of {@link #COMPUTE_MAXS} and {@link
+   * #COMPUTE_FRAMES}.
+   */
+  private final int flags;
+
   // Note: fields are ordered as in the ClassFile structure, and those related to attributes are
   // ordered as in Section 4.7 of the JVMS.
 
@@ -248,23 +254,39 @@ public class ClassWriter extends ClassVisitor {
    * @param classReader the {@link ClassReader} used to read the original class. It will be used to
    *     copy the entire constant pool and bootstrap methods from the original class and also to
    *     copy other fragments of original bytecode where applicable.
-   * @param flags option flags that can be used to modify the default behavior of this class.Must be
+   * @param flags option flags that can be used to modify the default behavior of this class. Must
-   *     zero or more of {@link #COMPUTE_MAXS} and {@link #COMPUTE_FRAMES}. <i>These option flags do
+   *     be zero or more of {@link #COMPUTE_MAXS} and {@link #COMPUTE_FRAMES}. <i>These option flags
-   *     not affect methods that are copied as is in the new class. This means that neither the
+   *     do not affect methods that are copied as is in the new class. This means that neither the
    *     maximum stack size nor the stack frames will be computed for these methods</i>.
    */
   public ClassWriter(final ClassReader classReader, final int flags) {
     super(/* latest api = */ Opcodes.ASM9);
+    this.flags = flags;
     symbolTable = classReader == null ? new SymbolTable(this) : new SymbolTable(this, classReader);
     if ((flags & COMPUTE_FRAMES) != 0) {
-      this.compute = MethodWriter.COMPUTE_ALL_FRAMES;
+      compute = MethodWriter.COMPUTE_ALL_FRAMES;
     } else if ((flags & COMPUTE_MAXS) != 0) {
-      this.compute = MethodWriter.COMPUTE_MAX_STACK_AND_LOCAL;
+      compute = MethodWriter.COMPUTE_MAX_STACK_AND_LOCAL;
     } else {
-      this.compute = MethodWriter.COMPUTE_NOTHING;
+      compute = MethodWriter.COMPUTE_NOTHING;
     }
   }
 
+  // -----------------------------------------------------------------------------------------------
+  // Accessors
+  // -----------------------------------------------------------------------------------------------
+
+  /**
+   * Returns true if all the given flags were passed to the constructor.
+   *
+   * @param flags some option flags. Must be zero or more of {@link #COMPUTE_MAXS} and {@link
+   *     #COMPUTE_FRAMES}.
+   * @return true if all the given flags, or more, were passed to the constructor.
+   */
+  public boolean hasFlags(final int flags) {
+    return (this.flags & flags) == flags;
+  }
+
   // -----------------------------------------------------------------------------------------------
   // Implementation of the ClassVisitor abstract class
   // -----------------------------------------------------------------------------------------------