Implemented more opcodes and unsafe stuff
This commit is contained in:
parent
dfb6060df9
commit
d38d5b2897
5 changed files with 340 additions and 84 deletions
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@ -1,3 +1,5 @@
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use crate::classfile::FieldInfo;
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use crate::classstore::ClassStore;
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use crate::stackframe::StackFrame;
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use crate::heap_area::ObjectReference;
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use crate::heap_area::FieldValue;
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@ -344,9 +346,204 @@ impl JavaLangStringUTF16 {
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}
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}
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struct JavaLangSystem {}
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impl JavaLangSystem {
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pub fn arraycopy(jvm: &mut JVM) -> Result<JVMCallbackOperation, Error> {
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let frame = {
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let frame_index = jvm.stack_frames.len() - 1;
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&mut jvm.stack_frames[frame_index]
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};
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let src = frame.load_local_reference(0).unwrap();
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let src_pos = frame.load_local_int(1).unwrap();
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let dest = frame.load_local_reference(2).unwrap();
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let dest_pos = frame.load_local_int(3).unwrap();
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let length = frame.load_local_int(4).unwrap();
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for i in 0..length {
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let src_value = jvm.heap_area.object_area.get_array_element(src, src_pos + i);
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jvm.heap_area.object_area.set_array_element(dest, (dest_pos + i) as usize, src_value);
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}
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Ok(JVMCallbackOperation::PopFrame())
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}
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}
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struct JavaLangThrowable {}
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impl JavaLangThrowable {
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}
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struct JdkInternalMiscUnsafe {}
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impl JdkInternalMiscUnsafe {
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fn class_field_at_offset(class_index: usize, class_store: &ClassStore, offset: i64) -> Result<&FieldInfo, Error> {
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let mut offset_counter = offset;
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match ClassFieldIterator::new(class_index, class_store)
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.take_while(|f| {
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let result = offset_counter >= 0;
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offset_counter -= f.descriptor.storage_size() as i64;
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result
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})
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.last() {
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Some(f) => Ok(f),
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None => Err(Error::RunTimeError(format!("Couldn't find int field at offset {offset} in class {}", class_store.class_name_from_index(class_index).unwrap())))
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}
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}
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fn array_class_reference_index_scale(class_reference: ObjectReference, jvm: &JVM) -> i32 {
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let class_class_index = jvm.class_store.class_idx_from_name(&String::from("java/lang/Class")).unwrap();
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let component_class_reference = match jvm.heap_area.object_area.get_object_field(class_reference, "componentType", class_class_index, &jvm.class_store).unwrap() {
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FieldValue::Reference(r) => r,
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_ => unreachable!(),
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};
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if component_class_reference == jvm.class_store.primitive_classes.boolean_class {
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1
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} else if component_class_reference == jvm.class_store.primitive_classes.byte_class {
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1
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} else if component_class_reference == jvm.class_store.primitive_classes.short_class {
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2
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} else if component_class_reference == jvm.class_store.primitive_classes.char_class {
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2
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} else if component_class_reference == jvm.class_store.primitive_classes.int_class {
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4
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} else if component_class_reference == jvm.class_store.primitive_classes.float_class {
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4
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} else if component_class_reference == jvm.class_store.primitive_classes.double_class {
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8
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} else if component_class_reference == jvm.class_store.primitive_classes.long_class {
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8
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} else {
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std::mem::size_of::<usize>() as i32
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}
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}
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pub fn compare_and_set_reference(jvm: &mut JVM) -> Result<JVMCallbackOperation, Error> {
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let frame = {
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let frame_index = jvm.stack_frames.len() - 1;
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&mut jvm.stack_frames[frame_index]
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};
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let object = frame.load_local_reference(1).unwrap();
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let offset = frame.load_local_long(2).unwrap();
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let expected = frame.load_local_reference(4).unwrap();
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let replacement = frame.load_local_reference(5).unwrap();
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if jvm.heap_area.object_area.is_array_reference(object) {
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let class_reference = jvm.heap_area.object_area.get_reference_class_ref(object, &jvm.class_store);
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let scale = JdkInternalMiscUnsafe::array_class_reference_index_scale(class_reference, jvm);
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let index = offset / (scale as i64);
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let value = jvm.heap_area.object_area.get_array_element(object, index as i32);
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let success = if value.expect_reference() == expected {
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jvm.heap_area.object_area.set_array_element(object, index as usize, replacement.into());
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true
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} else {
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false
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};
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Ok(JVMCallbackOperation::ReturnFrame(FieldValue::Boolean(success)))
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} else {
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todo!()
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}
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}
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pub fn put_reference_volatile(jvm: &mut JVM) -> Result<JVMCallbackOperation, Error> {
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let frame = {
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let frame_index = jvm.stack_frames.len() - 1;
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&mut jvm.stack_frames[frame_index]
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};
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let object = frame.load_local_reference(1).unwrap();
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let offset = frame.load_local_long(2).unwrap();
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let replacement = frame.load_local_reference(4).unwrap();
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if jvm.heap_area.object_area.is_array_reference(object) {
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let class_reference = jvm.heap_area.object_area.get_reference_class_ref(object, &jvm.class_store);
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let scale = JdkInternalMiscUnsafe::array_class_reference_index_scale(class_reference, jvm);
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let index = offset / (scale as i64);
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jvm.heap_area.object_area.set_array_element(object, index as usize, replacement.into());
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Ok(JVMCallbackOperation::PopFrame())
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} else {
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todo!()
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}
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}
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pub fn get_reference_volatile(jvm: &mut JVM) -> Result<JVMCallbackOperation, Error> {
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let frame = {
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let frame_index = jvm.stack_frames.len() - 1;
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&mut jvm.stack_frames[frame_index]
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};
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let object = frame.load_local_reference(1).unwrap();
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let offset = frame.load_local_long(2).unwrap();
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if jvm.heap_area.object_area.is_array_reference(object) {
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let class_reference = jvm.heap_area.object_area.get_reference_class_ref(object, &jvm.class_store);
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let scale = JdkInternalMiscUnsafe::array_class_reference_index_scale(class_reference, jvm);
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let index = offset / (scale as i64);
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let value = jvm.heap_area.object_area.get_array_element(object, index as i32);
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Ok(JVMCallbackOperation::ReturnFrame(value))
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} else {
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let object_class_descriptor = jvm.heap_area.object_area.get_reference_native_class_name(object, &jvm.class_store);
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let object_class_index = jvm.class_store.class_index_for_type(AbstractTypeDescription::parse_full(object_class_descriptor).unwrap()).unwrap();
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let field = JdkInternalMiscUnsafe::class_field_at_offset(object_class_index, &jvm.class_store, offset)?;
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// TODO: Type checking
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let value = jvm.heap_area.object_area.get_object_field(
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object,
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&field.name,
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object_class_index,
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&jvm.class_store
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)?;
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Ok(JVMCallbackOperation::ReturnFrame(value))
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}
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}
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pub fn compare_and_set_long(jvm: &mut JVM) -> Result<JVMCallbackOperation, Error> {
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let frame = {
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let frame_index = jvm.stack_frames.len() - 1;
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&mut jvm.stack_frames[frame_index]
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};
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let object = frame.load_local_reference(1).unwrap();
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let offset = frame.load_local_long(2).unwrap();
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let expected = frame.load_local_long(4).unwrap();
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let replacement = frame.load_local_long(6).unwrap();
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let object_class_descriptor = jvm.heap_area.object_area.get_reference_native_class_name(object, &jvm.class_store);
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let object_class_index = jvm.class_store.class_index_for_type(AbstractTypeDescription::parse_full(object_class_descriptor).unwrap()).unwrap();
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let field = JdkInternalMiscUnsafe::class_field_at_offset(object_class_index, &jvm.class_store, offset)?;
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// TODO: Type checking
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let function_result = if jvm.heap_area.object_area.get_object_field(object, &field.name, object_class_index, &jvm.class_store)? == FieldValue::Long(expected) {
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jvm.heap_area.object_area.set_object_field(
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object,
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&field.name,
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FieldValue::Long(replacement),
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object_class_index,
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&jvm.class_store
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)?;
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true
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} else {
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false
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};
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Ok(JVMCallbackOperation::ReturnFrame(FieldValue::Boolean(function_result)))
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}
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pub fn compare_and_set_int(jvm: &mut JVM) -> Result<JVMCallbackOperation, Error> {
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let frame = {
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let frame_index = jvm.stack_frames.len() - 1;
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@ -361,19 +558,9 @@ impl JdkInternalMiscUnsafe {
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let object_class_descriptor = jvm.heap_area.object_area.get_reference_native_class_name(object, &jvm.class_store);
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let object_class_index = jvm.class_store.class_index_for_type(AbstractTypeDescription::parse_full(object_class_descriptor).unwrap()).unwrap();
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let mut offset_counter = offset;
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let field = match ClassFieldIterator::new(object_class_index, &jvm.class_store)
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.take_while(|f| {
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let result = offset_counter >= 0;
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offset_counter -= f.descriptor.storage_size() as i64;
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result
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})
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.last() {
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Some(f) => f,
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None => return Err(Error::RunTimeError(format!("Couldn't find int field at offset {offset} in class {object_class_descriptor}")))
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};
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let field = JdkInternalMiscUnsafe::class_field_at_offset(object_class_index, &jvm.class_store, offset)?;
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// TODO: Type checking
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let function_result = if jvm.heap_area.object_area.get_object_field(object, &field.name, object_class_index, &jvm.class_store)? == FieldValue::Int(expected) {
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jvm.heap_area.object_area.set_object_field(
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object,
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@ -419,33 +606,10 @@ impl JdkInternalMiscUnsafe {
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};
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let class = jvm.class_store.class_file_from_idx(frame.class_index).unwrap();
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let method = & class.methods[frame.method_index as usize];
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let class_class_index = jvm.class_store.class_idx_from_name(&String::from("java/lang/Class")).unwrap();
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let class_reference = wrap_stackframe_error(class, method, frame.load_local_reference(1))?;
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let component_class_reference = match jvm.heap_area.object_area.get_object_field(class_reference, "componentType", class_class_index, &jvm.class_store).unwrap() {
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FieldValue::Reference(r) => r,
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_ => unreachable!(),
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};
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let index_scale: i32 = if component_class_reference == jvm.class_store.primitive_classes.boolean_class {
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1
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} else if component_class_reference == jvm.class_store.primitive_classes.byte_class {
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1
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} else if component_class_reference == jvm.class_store.primitive_classes.short_class {
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2
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} else if component_class_reference == jvm.class_store.primitive_classes.char_class {
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2
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} else if component_class_reference == jvm.class_store.primitive_classes.int_class {
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4
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} else if component_class_reference == jvm.class_store.primitive_classes.float_class {
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4
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} else if component_class_reference == jvm.class_store.primitive_classes.double_class {
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8
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} else if component_class_reference == jvm.class_store.primitive_classes.long_class {
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8
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} else {
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std::mem::size_of::<usize>() as i32
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};
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let index_scale = JdkInternalMiscUnsafe::array_class_reference_index_scale(class_reference, jvm);
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Ok(JVMCallbackOperation::ReturnFrame(FieldValue::Int(index_scale)))
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}
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@ -507,13 +671,16 @@ impl JdkInternalUtilSystemPropsRaw {
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// command-line configured properties, should return at least java.home
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pub fn vm_properties(jvm: &mut JVM) -> Result<JVMCallbackOperation, Error> {
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let native_array = vec![
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("java.home", "./"),
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("java.home", "./"), // TODO
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("stdout.encoding", "UTF-8"),
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("java.io.tmpdir", "/tmp"),
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("user.language", "en"),
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("user.script", ""),
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("user.country", "US"),
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("user.variant", ""),
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("user.dir", "./"),
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("user.home", "./"), // TODO
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("user.name", "java"), // TODO
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("sun.nio.MaxDirectMemorySize", "9223372036854775807"),
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("sun.nio.PageAlignDirectMemory", "false"),
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];
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@ -1121,7 +1288,7 @@ pub fn function_for(class_name: &str, m: &crate::classfile::MethodInfo) -> Resul
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]),
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return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Void()},
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},
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todo_call
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JavaLangSystem::arraycopy
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),
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(
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@ -1450,7 +1617,7 @@ pub fn function_for(class_name: &str, m: &crate::classfile::MethodInfo) -> Resul
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]),
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return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Boolean() },
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},
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todo_call
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JdkInternalMiscUnsafe::compare_and_set_long
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),
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(
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@ -1465,7 +1632,7 @@ pub fn function_for(class_name: &str, m: &crate::classfile::MethodInfo) -> Resul
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]),
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return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Boolean() },
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},
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todo_call
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JdkInternalMiscUnsafe::compare_and_set_reference
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),
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(
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@ -1772,7 +1939,7 @@ pub fn function_for(class_name: &str, m: &crate::classfile::MethodInfo) -> Resul
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]),
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return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Classname(String::from("java/lang/Object"))},
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},
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todo_call
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JdkInternalMiscUnsafe::get_reference_volatile
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),
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(
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@ -2215,7 +2382,7 @@ pub fn function_for(class_name: &str, m: &crate::classfile::MethodInfo) -> Resul
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]),
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return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Void() },
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},
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todo_call
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JdkInternalMiscUnsafe::put_reference_volatile
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),
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(
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@ -2684,6 +2851,18 @@ pub fn function_for(class_name: &str, m: &crate::classfile::MethodInfo) -> Resul
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},
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todo_call
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),
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(
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"java/lang/Throwable",
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"fillInStackTrace",
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MethodDescriptor {
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argument_types: Box::new([
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AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Int()}
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]),
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return_type: AbstractTypeDescription { array_level: 0, kind: AbstractTypeKind::Classname("java/lang/Throwable".to_string())},
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},
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JavaLangThrowable::fill_in_stacktrace()
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),
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];
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for (classname, methodname, methoddescriptor, binding) in native_mappings {
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