Implemented VM.initalize and LoadConstant64

src/jvm.rs

@@ -1045,11 +1045,26 @@ impl JVM {
                 }
 
                 Instruction::InstanceOf(classref_index) => {
-                    // TODO: Class loading checks
                     let class_name = class.gather_class(classref_index)?;
-                    let object = wrap_stackframe_error(class, method, frame.operand_stack.pop_reference(0))?;
+                    let object = wrap_stackframe_error(class, method, frame.operand_stack.peek_reference(0))?;
                     let native_class_name = self.heap_area.object_area.get_reference_native_class_name(object, &self.class_store);
 
+                    if class_name.starts_with("[") {
+                        // TODO: Create array class on demand
+                    } else {
+                        if ! self.class_store.have_class(class_name) {
+                            frame.instruction_pointer -= offset as u32;
+                            return Ok(JVMCallbackOperation::LoadClass(class_name.to_string()));
+                        }
+                        if ! self.class_store.was_init(class_name).unwrap() {
+                            frame.instruction_pointer -= offset as u32;
+                            return Ok(JVMCallbackOperation::InitClass(class_name.to_string()));
+                        }
+                    }
+
+                    frame.operand_stack.pop_reference(0).unwrap();
+
+
                     let instruction_result = if class_name == native_class_name {
                         1
                     } else {
@@ -1449,6 +1464,20 @@ impl JVM {
                     }
                 }
 
+                Instruction::LoadConstant64(wide_index) => {
+                    match class.pool_entry(wide_index).unwrap() {
+                        ConstantPoolInfo::Long(long_data) => {
+                            let long_value = long_data.value;
+
+                            wrap_stackframe_error(class, method, frame.operand_stack.push_long(long_value))?;
+                        }
+                        _ => {
+                            println!("{:?}", class.pool_entry(wide_index).unwrap());
+                            todo!()
+                        }
+                    }
+                }
+
                 Instruction::LoadLocalFloat(index) => {
                     load_local_float(class, method, frame, index as usize)?;
                 }
@@ -1749,6 +1778,12 @@ impl JVM {
                             FieldValue::Int(int_value)
                         }
 
+                        (0, AbstractTypeKind::Long()) => {
+                            let long_value = wrap_stackframe_error(class, method, frame.operand_stack.pop_long(0))?;
+
+                            FieldValue::Long(long_value)
+                        }
+
                         (0..=255, AbstractTypeKind::Classname(_field_type_name)) => {
                             let ref_value = wrap_stackframe_error(class, method, frame.operand_stack.pop_reference(0))?;
 

src/native_methods.rs

@@ -395,22 +395,42 @@ impl JdkInternalUtilSystemPropsRaw {
 
     // command-line configured properties, should return at least java.home
     pub fn vm_properties(jvm: &mut JVM) -> Result<JVMCallbackOperation, Error> {
-        let array_length = 4;
+        let native_array = vec![
+            ("java.home", "./"),
+            ("stdout.encoding", "UTF-8"),
+            ("java.io.tmpdir", "/tmp"),
+            ("user.language", "en"),
+            ("user.script", ""),
+            ("user.country", "US"),
+            ("user.variant", ""),
+        ]; 
+        // TODO: Cross-Platform tmpdir
+        // TODO: locale detection
+        let array_length = native_array.len() * 2 + 2;
         let array_reference = jvm.heap_area.make_empty_array(&jvm.class_store, AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Classname("java/lang/String".into()) }, array_length);
 
-        {
-            // TODO: Actual java home path
-            let java_home_key_reference   = jvm.heap_area.make_handmade_string(&String::from("java.home"), &jvm.class_store);
-            let java_home_value_reference = jvm.heap_area.make_handmade_string(&String::from("./"), &jvm.class_store);
+        for (index, (key, value)) in native_array.iter().enumerate() {
+            let key_string: String = key.to_string();
+            let value_string: String = value.to_string();
+            let key_reference   = jvm.heap_area.make_handmade_string(&key_string, &jvm.class_store);
+            let value_reference = jvm.heap_area.make_handmade_string(&value_string, &jvm.class_store);
 
-            jvm.heap_area.object_area.set_array_element(array_reference, 0, java_home_key_reference.into());
-            jvm.heap_area.object_area.set_array_element(array_reference, 1, java_home_value_reference.into());
+            jvm.heap_area.object_area.set_array_element(array_reference, index * 2    , key_reference.into());
+            jvm.heap_area.object_area.set_array_element(array_reference, index * 2 + 1, value_reference.into());
         }
 
         Ok(JVMCallbackOperation::ReturnFrame(StackValue::Reference(array_reference)))
     }
 }
 
+pub struct JdkInternalMiscVM {}
+
+impl JdkInternalMiscVM {
+    pub fn initialize(jvm: &mut JVM) -> Result<JVMCallbackOperation, Error> {
+        Ok(JVMCallbackOperation::PopFrame())
+    }
+}
+
 
 pub fn function_for(class_name: &str, m: &crate::classfile::MethodInfo) -> Result<NativeMethodCallable, Error> {
     let method_name: &str = &m.name;
@@ -2548,6 +2568,119 @@ pub fn function_for(class_name: &str, m: &crate::classfile::MethodInfo) -> Resul
             Ok(todo_call)
         }
 
+        ("jdk/internal/misc/VM", "getgid") => {
+            let expected_descriptor = MethodDescriptor {
+                argument_types: Box::new([
+                ]),
+                return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Long()},
+            };
+
+            if m.descriptor != expected_descriptor {
+                return Err(Error::RunTimeError(format!("Native descriptor mismatch for method '{class_name}.{method_name}': found '{}' but expected '{}'", m.descriptor.source_string(), expected_descriptor.source_string())));
+            }
+
+            Ok(todo_call)
+        }
+
+        ("jdk/internal/misc/VM", "getegid") => {
+            let expected_descriptor = MethodDescriptor {
+                argument_types: Box::new([
+                ]),
+                return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Long()},
+            };
+
+            if m.descriptor != expected_descriptor {
+                return Err(Error::RunTimeError(format!("Native descriptor mismatch for method '{class_name}.{method_name}': found '{}' but expected '{}'", m.descriptor.source_string(), expected_descriptor.source_string())));
+            }
+
+            Ok(todo_call)
+        }
+
+        ("jdk/internal/misc/VM", "geteuid") => {
+            let expected_descriptor = MethodDescriptor {
+                argument_types: Box::new([
+                ]),
+                return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Long()},
+            };
+
+            if m.descriptor != expected_descriptor {
+                return Err(Error::RunTimeError(format!("Native descriptor mismatch for method '{class_name}.{method_name}': found '{}' but expected '{}'", m.descriptor.source_string(), expected_descriptor.source_string())));
+            }
+
+            Ok(todo_call)
+        }
+
+        ("jdk/internal/misc/VM", "getuid") => {
+            let expected_descriptor = MethodDescriptor {
+                argument_types: Box::new([
+                ]),
+                return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Long()},
+            };
+
+            if m.descriptor != expected_descriptor {
+                return Err(Error::RunTimeError(format!("Native descriptor mismatch for method '{class_name}.{method_name}': found '{}' but expected '{}'", m.descriptor.source_string(), expected_descriptor.source_string())));
+            }
+
+            Ok(todo_call)
+        }
+
+        ("jdk/internal/misc/VM", "getNanoTimeAdjustment") => {
+            let expected_descriptor = MethodDescriptor {
+                argument_types: Box::new([
+                    AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Long()},
+                ]),
+                return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Long()},
+            };
+
+            if m.descriptor != expected_descriptor {
+                return Err(Error::RunTimeError(format!("Native descriptor mismatch for method '{class_name}.{method_name}': found '{}' but expected '{}'", m.descriptor.source_string(), expected_descriptor.source_string())));
+            }
+
+            Ok(todo_call)
+        }
+
+        ("jdk/internal/misc/VM", "getRuntimeArguments") => {
+            let expected_descriptor = MethodDescriptor {
+                argument_types: Box::new([
+                ]),
+                return_type: AbstractTypeDescription { array_level: 1, kind: AbstractTypeKind::Classname("java/lang/String".to_string())},
+            };
+
+            if m.descriptor != expected_descriptor {
+                return Err(Error::RunTimeError(format!("Native descriptor mismatch for method '{class_name}.{method_name}': found '{}' but expected '{}'", m.descriptor.source_string(), expected_descriptor.source_string())));
+            }
+
+            Ok(todo_call)
+        }
+
+        ("jdk/internal/misc/VM", "initialize") => {
+            let expected_descriptor = MethodDescriptor {
+                argument_types: Box::new([
+                ]),
+                return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Void()},
+            };
+
+            if m.descriptor != expected_descriptor {
+                return Err(Error::RunTimeError(format!("Native descriptor mismatch for method '{class_name}.{method_name}': found '{}' but expected '{}'", m.descriptor.source_string(), expected_descriptor.source_string())));
+            }
+
+            Ok(JdkInternalMiscVM::initialize)
+        }
+
+        ("jdk/internal/misc/VM", "latestUserDefinedLoader0") => {
+            let expected_descriptor = MethodDescriptor {
+                argument_types: Box::new([
+                ]),
+                return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Classname("java/lang/ClassLoader".to_string())},
+            };
+
+            if m.descriptor != expected_descriptor {
+                return Err(Error::RunTimeError(format!("Native descriptor mismatch for method '{class_name}.{method_name}': found '{}' but expected '{}'", m.descriptor.source_string(), expected_descriptor.source_string())));
+            }
+
+            Ok(todo_call)
+        }
+
         ("jdk/internal/util/SystemProps$Raw", "platformProperties") => {
             let expected_descriptor = MethodDescriptor {
                 argument_types: Box::new([

src/stackframe.rs

@@ -50,6 +50,17 @@ impl OperandStack {
         Ok(())
     }
 
+    pub fn push_long(&mut self, long: i64) -> Result<(), Error> {
+        let long_bytes: [u8; 8] = long.to_be_bytes();
+
+        let long0_bytes = u32::from_be_bytes([long_bytes[0], long_bytes[1], long_bytes[2], long_bytes[3]]);
+        self.push(StackValue::Long0(long0_bytes))?;
+        let long1_bytes = u32::from_be_bytes([long_bytes[4], long_bytes[5], long_bytes[6], long_bytes[7]]);
+        self.push(StackValue::Long1(long1_bytes))?;
+
+        Ok(())
+    }
+
     pub fn push_field_value(&mut self, value: FieldValue) -> Result<(), Error> {
         match value {
             FieldValue::Reference(r) => {
@@ -187,6 +198,15 @@ impl OperandStack {
         }
     }
 
+    pub fn peek_reference(&mut self, index: usize) -> Result<ObjectReference, Error> {
+        let absolute_index = self.depth as usize - 1 - index;
+        let value = self.stack[absolute_index];
+        match value {
+            StackValue::Reference(o) => Ok(o),
+            _ => Err(Error::LocalError(format!("Mismatched type at index {} of the function operand stack, expected Reference but found '{:?}'", index, value)))
+        }
+    }
+
     pub fn pop_returnaddress(&mut self, index: usize) -> Result<u32, Error> {
         let absolute_index = self.depth as usize - 1 - index;
         let value = self.stack[absolute_index];
@@ -253,14 +273,17 @@ impl OperandStack {
         }
     }
 
-    pub fn pop_long(&mut self, index: usize) -> Result<u64, Error> {
+    pub fn pop_long(&mut self, index: usize) -> Result<i64, Error> {
         let absolute_index = self.depth as usize - 1 - index;
-        let higher_bytes = self.stack[absolute_index];
-        let lower_bytes  = self.stack[absolute_index + 1];
+        let lower_bytes    = self.stack[absolute_index];
+        let higher_bytes   = self.stack[absolute_index - 1];
         self.depth -= 2;
         match (higher_bytes, lower_bytes) {
             (StackValue::Long0(hi), StackValue::Long1(lo)) => {
-                Ok(((hi as u64) << 32) | lo as u64)
+                let concat_u64 = ((hi as u64) << 32) | lo as u64;
+                let concat_array = concat_u64.to_ne_bytes();
+                let long_value = i64::from_ne_bytes(concat_array);
+                Ok(long_value)
             },
             _ => Err(Error::LocalError(format!("Mismatched types at index {} of the function operand stack, expected (Long0, Long1) but found '{:?}'", index, (higher_bytes, lower_bytes))))
         }