raydac / j-j-jvm Goto Github PK
View Code? Open in Web Editor NEWJVM bytecode interpreter written in Java
License: Apache License 2.0
j-j-jvm's Issues
I did something similar
Hi! I also developed an JVM with java, wich can run itself. Once compiled to a "java.jar" file, you can write:
java -jar java.jar -jar java.jar MainClass. I'll look above your code, maybe i'll get some inspirations.
Here is my raw byte code interpreter:
https://gitlab.com/neoexpert/jvm/blob/master/jvm/src/main/java/com/neoexpert/jvm/executor/RawByteCodeExecutor.java
Enumeration support
Hi,
Enumerations are not supported. Attached test fails.
Could you please suggest how to fix?
Thank you in advance
enumeration.zip
Clone fails with java.lang.IllegalAccessException
Hi, nice work with your interpreter! I was having problems with some code that clones an array so I added something to your test like this:
--- a/jdwp/java/src/test/java/com/igormaznitsa/jjjvm/JJJVMInterpreterTest.java
+++ b/jdwp/java/src/test/java/com/igormaznitsa/jjjvm/JJJVMInterpreterTest.java
@@ -2583,6 +2583,7 @@ public class JJJVMInterpreterTest extends TestHelper implements JSEProviderImpl.
+ " int index = 0;"
+ " for(int x=0; x<array.length; x++){"
+ " int [] fill = array[x];"
+ + " int [] bill = (int [])fill.clone();"
+ " for(int y=0; y< fill.length; y++){"
+ " fill[y] = index++;"
+ " }"
but that causes failures:
10:02:11.986 [main] ERROR com.igormaznitsa.jjjvm.JJJVMInterpreter - caught
java.lang.IllegalAccessException: Class com.igormaznitsa.jjjvm.impl.jse.JSEProviderImpl can not access a member of class java.lang.Object with modifiers "protected native"
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:102) ~[?:1.8.0-internal]
at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:296) ~[?:1.8.0-internal]
at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:288) ~[?:1.8.0-internal]
at java.lang.reflect.Method.invoke(Method.java:491) ~[?:1.8.0-internal]
at com.igormaznitsa.jjjvm.impl.jse.JSEProviderImpl.invoke(JSEProviderImpl.java:217) ~[classes/:?]
at com.igormaznitsa.jjjvm.JJJVMInterpreter._invoke(JJJVMInterpreter.java:1516) [classes/:?]
at com.igormaznitsa.jjjvm.JJJVMInterpreter.invoke(JJJVMInterpreter.java:81) [classes/:?]
at com.igormaznitsa.jjjvm.utils.TestHelper.executeTestMethod(TestHelper.java:188) [test-classes/:?]
at com.igormaznitsa.jjjvm.JJJVMInterpreterTest.testIntegration_FillMultidimensionalArray_Int(JJJVMInterpreterTest.java:2594) [test-classes/:?]
and
testIntegration_FillMultidimensionalArray_Int(com.igormaznitsa.jjjvm.JJJVMInterpreterTest) Time elapsed: 0.905 sec <<< ERROR!
java.lang.IllegalAccessException: Class com.igormaznitsa.jjjvm.impl.jse.JSEProviderImpl can not access a member of class java.lang.Object with modifiers "protected native"
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:102)
at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:296)
at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:288)
at java.lang.reflect.Method.invoke(Method.java:491)
at com.igormaznitsa.jjjvm.impl.jse.JSEProviderImpl.invoke(JSEProviderImpl.java:217)
at com.igormaznitsa.jjjvm.JJJVMInterpreter._invoke(JJJVMInterpreter.java:1516)
at com.igormaznitsa.jjjvm.JJJVMInterpreter.invoke(JJJVMInterpreter.java:81)
at com.igormaznitsa.jjjvm.utils.TestHelper.executeTestMethod(TestHelper.java:188)
at com.igormaznitsa.jjjvm.JJJVMInterpreterTest.testIntegration_FillMultidimensionalArray_Int(JJJVMInterpreterTest.java:2594)
How easy do you think that is to fix?
Iterable does not work
Hi,
Excellent project. Unfortunately, following code fails on the cycle:
List<String> list = Collections.EMPTY_LIST;
for (String element: list) {
}
Output:
java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.Integer
at com.igormaznitsa.jjjvm.JJJVMInterpreter._invoke(JJJVMInterpreter.java:1063)
at com.igormaznitsa.jjjvm.JJJVMInterpreter.invoke(JJJVMInterpreter.java:77)
at com.igormaznitsa.jjjvm.impl.JJJVMClassMethodImpl.invoke(JJJVMClassMethodImpl.java:111)
Could you please have a look?
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