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8256157: Improve bytecode assembly

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Reviewed-by: jlahoda, rhalade, mschoene
This commit is contained in:
Vicente Romero 2021-01-26 21:44:10 +00:00 committed by Henry Jen
parent 9b177a7486
commit 7ad6c23c32
1 changed files with 6 additions and 0 deletions
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6
src/java.base/share/classes/jdk/internal/org/objectweb/asm/ClassReader.java
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@ -538,6 +538,9 @@ public class ClassReader {
} else if (Constants.SYNTHETIC.equals(attributeName)) { } else if (Constants.SYNTHETIC.equals(attributeName)) {
accessFlags |= Opcodes.ACC_SYNTHETIC; accessFlags |= Opcodes.ACC_SYNTHETIC;
} else if (Constants.SOURCE_DEBUG_EXTENSION.equals(attributeName)) { } else if (Constants.SOURCE_DEBUG_EXTENSION.equals(attributeName)) {
if (attributeLength > classFileBuffer.length - currentAttributeOffset) {
throw new IllegalArgumentException();
}
sourceDebugExtension = sourceDebugExtension =
readUtf(currentAttributeOffset, attributeLength, new char[attributeLength]); readUtf(currentAttributeOffset, attributeLength, new char[attributeLength]);
} else if (Constants.RUNTIME_INVISIBLE_ANNOTATIONS.equals(attributeName)) { } else if (Constants.RUNTIME_INVISIBLE_ANNOTATIONS.equals(attributeName)) {
@ -1548,6 +1551,9 @@ public class ClassReader {
final int maxLocals = readUnsignedShort(currentOffset + 2); final int maxLocals = readUnsignedShort(currentOffset + 2);
final int codeLength = readInt(currentOffset + 4); final int codeLength = readInt(currentOffset + 4);
currentOffset += 8; currentOffset += 8;
if (codeLength > classFileBuffer.length - currentOffset) {
throw new IllegalArgumentException();
}
// Read the bytecode 'code' array to create a label for each referenced instruction. // Read the bytecode 'code' array to create a label for each referenced instruction.
final int bytecodeStartOffset = currentOffset; final int bytecodeStartOffset = currentOffset;