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src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.replacements/src/org/graalvm/compiler/replacements/classfile/Classfile.java

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rev 48343 : imported patch JDK-8173382-classfile-version


  30 
  31 import org.graalvm.compiler.replacements.classfile.ClassfileConstant.Utf8;
  32 
  33 import jdk.vm.ci.meta.ResolvedJavaMethod;
  34 import jdk.vm.ci.meta.ResolvedJavaType;
  35 
  36 /**
  37  * Container for objects representing the {@code Code} attributes parsed from a class file.
  38  *
  39  * @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.3">Code
  40  *      attributes</a>
  41  * @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4">Constant
  42  *      Pool</a>
  43  */
  44 public class Classfile {
  45 
  46     private final ResolvedJavaType type;
  47     private final List<ClassfileBytecode> codeAttributes;
  48 
  49     private static final int MAJOR_VERSION_JAVA_MIN = 51;
  50     private static final int MAJOR_VERSION_JAVA_MAX = 54;
  51     private static final int MAGIC = 0xCAFEBABE;
  52 
  53     /**
  54      * Creates a {@link Classfile} by parsing the class file bytes for {@code type} loadable from
  55      * {@code context}.
  56      *
  57      * @throws NoClassDefFoundError if there is an IO error while parsing the class file
  58      */
  59     public Classfile(ResolvedJavaType type, DataInputStream stream, ClassfileBytecodeProvider context) throws IOException {
  60         this.type = type;
  61 
  62         // magic
  63         int magic = stream.readInt();
  64         assert magic == MAGIC;
  65 
  66         int minor = stream.readUnsignedShort();
  67         int major = stream.readUnsignedShort();
  68         if (major < MAJOR_VERSION_JAVA_MIN || major > MAJOR_VERSION_JAVA_MAX) {
  69             throw new UnsupportedClassVersionError("Unsupported class file version: " + major + "." + minor);
  70         }




  30 
  31 import org.graalvm.compiler.replacements.classfile.ClassfileConstant.Utf8;
  32 
  33 import jdk.vm.ci.meta.ResolvedJavaMethod;
  34 import jdk.vm.ci.meta.ResolvedJavaType;
  35 
  36 /**
  37  * Container for objects representing the {@code Code} attributes parsed from a class file.
  38  *
  39  * @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.3">Code
  40  *      attributes</a>
  41  * @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4">Constant
  42  *      Pool</a>
  43  */
  44 public class Classfile {
  45 
  46     private final ResolvedJavaType type;
  47     private final List<ClassfileBytecode> codeAttributes;
  48 
  49     private static final int MAJOR_VERSION_JAVA_MIN = 51;
  50     private static final int MAJOR_VERSION_JAVA_MAX = 55;
  51     private static final int MAGIC = 0xCAFEBABE;
  52 
  53     /**
  54      * Creates a {@link Classfile} by parsing the class file bytes for {@code type} loadable from
  55      * {@code context}.
  56      *
  57      * @throws NoClassDefFoundError if there is an IO error while parsing the class file
  58      */
  59     public Classfile(ResolvedJavaType type, DataInputStream stream, ClassfileBytecodeProvider context) throws IOException {
  60         this.type = type;
  61 
  62         // magic
  63         int magic = stream.readInt();
  64         assert magic == MAGIC;
  65 
  66         int minor = stream.readUnsignedShort();
  67         int major = stream.readUnsignedShort();
  68         if (major < MAJOR_VERSION_JAVA_MIN || major > MAJOR_VERSION_JAVA_MAX) {
  69             throw new UnsupportedClassVersionError("Unsupported class file version: " + major + "." + minor);
  70         }


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