JVM step by step simulator
Is there a free JVM implementation that allow to see the content of the different parts of the Java Virtual Machine (e.g., callstack, heap) and execute a program step by step?
jvm bytecode
asked Nov 19 at 20:40
Briomkez
16119
add a comment |
Is there a free JVM implementation that allow to see the content of the different parts of the Java Virtual Machine (e.g., callstack, heap) and execute a program step by step?
jvm bytecode
asked Nov 19 at 20:40
Briomkez
16119
add a comment |
Is there a free JVM implementation that allow to see the content of the different parts of the Java Virtual Machine (e.g., callstack, heap) and execute a program step by step?
jvm bytecode
asked Nov 19 at 20:40
Briomkez
16119
Is there a free JVM implementation that allow to see the content of the different parts of the Java Virtual Machine (e.g., callstack, heap) and execute a program step by step?
jvm bytecode
jvm bytecode
asked Nov 19 at 20:40
Briomkez
16119
asked Nov 19 at 20:40
Briomkez
16119
asked Nov 19 at 20:40
Briomkez
16119
asked Nov 19 at 20:40
Briomkez
16119
asked Nov 19 at 20:40
Briomkez
16119
16119
add a comment |
add a comment |
1 Answer
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Once the JIT compiles the bytecode to native code, the VM registers and stack have little meaning.
I would use your debugger to see what the Java program is doing line by line. The bytecode is for a virtual machine, not an actual one and the JVM doesn't have to follow the VM literally, only what the program does.
The JIT can
- use the many registers your CPU has rather than use a pure stack.
- inline code rather than perform method calls.
- remove code which it determines isn't used.
- place objects on the stack.
- not synchronize objects which are only used in a local method.
A good tool to see how the code is translated from byte code to machine code is JITWatch
answered Nov 22 at 17:49
Peter Lawrey
440k55558957
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Once the JIT compiles the bytecode to native code, the VM registers and stack have little meaning.
I would use your debugger to see what the Java program is doing line by line. The bytecode is for a virtual machine, not an actual one and the JVM doesn't have to follow the VM literally, only what the program does.
The JIT can
- use the many registers your CPU has rather than use a pure stack.
- inline code rather than perform method calls.
- remove code which it determines isn't used.
- place objects on the stack.
- not synchronize objects which are only used in a local method.
A good tool to see how the code is translated from byte code to machine code is JITWatch
answered Nov 22 at 17:49
Peter Lawrey
440k55558957
add a comment |
Once the JIT compiles the bytecode to native code, the VM registers and stack have little meaning.
I would use your debugger to see what the Java program is doing line by line. The bytecode is for a virtual machine, not an actual one and the JVM doesn't have to follow the VM literally, only what the program does.
The JIT can
- use the many registers your CPU has rather than use a pure stack.
- inline code rather than perform method calls.
- remove code which it determines isn't used.
- place objects on the stack.
- not synchronize objects which are only used in a local method.
A good tool to see how the code is translated from byte code to machine code is JITWatch
answered Nov 22 at 17:49
Peter Lawrey
440k55558957
add a comment |
Once the JIT compiles the bytecode to native code, the VM registers and stack have little meaning.
I would use your debugger to see what the Java program is doing line by line. The bytecode is for a virtual machine, not an actual one and the JVM doesn't have to follow the VM literally, only what the program does.
The JIT can
- use the many registers your CPU has rather than use a pure stack.
- inline code rather than perform method calls.
- remove code which it determines isn't used.
- place objects on the stack.
- not synchronize objects which are only used in a local method.
A good tool to see how the code is translated from byte code to machine code is JITWatch
answered Nov 22 at 17:49
Peter Lawrey
440k55558957
Once the JIT compiles the bytecode to native code, the VM registers and stack have little meaning.
I would use your debugger to see what the Java program is doing line by line. The bytecode is for a virtual machine, not an actual one and the JVM doesn't have to follow the VM literally, only what the program does.
The JIT can
- use the many registers your CPU has rather than use a pure stack.
- inline code rather than perform method calls.
- remove code which it determines isn't used.
- place objects on the stack.
- not synchronize objects which are only used in a local method.
A good tool to see how the code is translated from byte code to machine code is JITWatch
answered Nov 22 at 17:49
Peter Lawrey
440k55558957
answered Nov 22 at 17:49
Peter Lawrey
440k55558957
answered Nov 22 at 17:49
Peter Lawrey
440k55558957
answered Nov 22 at 17:49
Peter Lawrey
440k55558957
440k55558957
add a comment |
add a comment |
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