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implement invokeinterface

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This commit is contained in:
Zack Buhman 2024-12-29 09:38:03 -06:00
parent b6da4ecea7
commit 8768bd516c
5 changed files with 114 additions and 11 deletions
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77
c/class_resolver.c
View File

@ -382,28 +382,87 @@ struct method_info * class_resolver_lookup_method(int methods_hash_table_length,
return (struct method_info *)e->value;
}
struct method_entry class_resolver_lookup_method_from_interfacemethodref_index(int class_hash_table_length,
struct hash_table_entry * class_hash_table,
int32_t interfacemethodref_index,
struct class_entry * objectref_class_entry,
struct class_entry * origin_class_entry)
{
struct constant * interfacemethodref_constant = &origin_class_entry->class_file->constant_pool[interfacemethodref_index - 1];
assert(interfacemethodref_constant->tag == CONSTANT_InterfaceMethodref);
struct constant * nameandtype_constant = &origin_class_entry->class_file->constant_pool[interfacemethodref_constant->interfacemethodref.name_and_type_index - 1];
assert(nameandtype_constant->tag == CONSTANT_NameAndType);
struct constant * method_name_constant = &origin_class_entry->class_file->constant_pool[nameandtype_constant->nameandtype.name_index - 1];
assert(method_name_constant->tag == CONSTANT_Utf8);
struct constant * method_descriptor_constant = &origin_class_entry->class_file->constant_pool[nameandtype_constant->nameandtype.descriptor_index - 1];
assert(method_descriptor_constant->tag == CONSTANT_Utf8);
struct class_entry * class_entry = objectref_class_entry;
while (true) {
struct method_info * method_info = class_resolver_lookup_method(class_entry->methods.length,
class_entry->methods.entry,
method_name_constant->utf8.bytes,
method_name_constant->utf8.length,
method_descriptor_constant->utf8.bytes,
method_descriptor_constant->utf8.length);
if (method_info != nullptr) {
debugf("method resolved:\n");
debugf(" class: ");
debug_print__class_entry__class_name(class_entry);
debugf("\n method: ");
debug_print__method_info__method_name(class_entry, method_info);
debugc('\n');
return (struct method_entry){
.class_entry = class_entry,
.method_info = method_info
};
}
if (class_entry->class_file->super_class == 0)
break;
struct constant * class_constant = &class_entry->class_file->constant_pool[class_entry->class_file->super_class - 1];
assert(class_constant->tag == CONSTANT_Class);
struct constant * class_name_constant = &class_entry->class_file->constant_pool[class_constant->class.name_index - 1];
assert(class_name_constant->tag == CONSTANT_Utf8);
print_utf8_string(class_name_constant);
debugf("\n");
// lookup the method from the superclass
class_entry = class_resolver_lookup_class_from_class_index(class_hash_table_length,
class_hash_table,
class_entry,
class_entry->class_file->super_class);
assert(class_entry != nullptr);
}
assert(!"invokeinterface method does not exist");
}
struct method_entry * class_resolver_lookup_method_from_methodref_index(int class_hash_table_length,
struct hash_table_entry * class_hash_table,
int32_t methodref_index,
struct class_entry * original_class_entry)
struct class_entry * origin_class_entry)
{
if (original_class_entry->attribute_entry[methodref_index - 1].method_entry != nullptr) {
if (origin_class_entry->attribute_entry[methodref_index - 1].method_entry != nullptr) {
debugf("class_resolver_lookup_method_from_methodref_index %d: [cached]\n", methodref_index);
return original_class_entry->attribute_entry[methodref_index - 1].method_entry;
return origin_class_entry->attribute_entry[methodref_index - 1].method_entry;
}
struct constant * methodref_constant = &original_class_entry->class_file->constant_pool[methodref_index - 1];
struct constant * methodref_constant = &origin_class_entry->class_file->constant_pool[methodref_index - 1];
assert(methodref_constant->tag == CONSTANT_Methodref);
struct constant * nameandtype_constant = &original_class_entry->class_file->constant_pool[methodref_constant->methodref.name_and_type_index - 1];
struct constant * nameandtype_constant = &origin_class_entry->class_file->constant_pool[methodref_constant->methodref.name_and_type_index - 1];
assert(nameandtype_constant->tag == CONSTANT_NameAndType);
struct constant * method_name_constant = &original_class_entry->class_file->constant_pool[nameandtype_constant->nameandtype.name_index - 1];
struct constant * method_name_constant = &origin_class_entry->class_file->constant_pool[nameandtype_constant->nameandtype.name_index - 1];
assert(method_name_constant->tag == CONSTANT_Utf8);
struct constant * method_descriptor_constant = &original_class_entry->class_file->constant_pool[nameandtype_constant->nameandtype.descriptor_index - 1];
struct constant * method_descriptor_constant = &origin_class_entry->class_file->constant_pool[nameandtype_constant->nameandtype.descriptor_index - 1];
assert(method_descriptor_constant->tag == CONSTANT_Utf8);
struct class_entry * class_entry = class_resolver_lookup_class_from_class_index(class_hash_table_length,
class_hash_table,
original_class_entry,
origin_class_entry,
methodref_constant->methodref.class_index);
while (true) {
@ -425,7 +484,7 @@ struct method_entry * class_resolver_lookup_method_from_methodref_index(int clas
struct method_entry * method_entry = malloc_class_arena((sizeof (struct method_entry)));
method_entry->class_entry = class_entry;
method_entry->method_info = method_info;
original_class_entry->attribute_entry[methodref_index - 1].method_entry = method_entry;
origin_class_entry->attribute_entry[methodref_index - 1].method_entry = method_entry;
return method_entry;
}

7
c/class_resolver.h
View File

@ -71,10 +71,15 @@ struct method_info * class_resolver_lookup_method(int methods_hash_table_length,
int method_name_length,
const uint8_t * method_descriptor,
int method_descriptor_length);
struct method_entry class_resolver_lookup_method_from_interfacemethodref_index(int class_hash_table_length,
struct hash_table_entry * class_hash_table,
int32_t interfacemethodref_index,
struct class_entry * objectref_class_entry,
struct class_entry * origin_class_entry);
struct method_entry * class_resolver_lookup_method_from_methodref_index(int class_hash_table_length,
struct hash_table_entry * class_hash_table,
int32_t methodref_index,
struct class_entry * original_class_entry);
struct class_entry * origin_class_entry);
struct field_entry * class_resolver_lookup_field(int fields_hash_table_length,
struct hash_table_entry * fields_hash_table,
const uint8_t * field_name,

13
c/execute.c
View File

@ -1117,7 +1117,18 @@ void op_invokedynamic(struct vm * vm, uint32_t index)
void op_invokeinterface(struct vm * vm, uint32_t index, uint32_t count)
{
assert(!"op_invokeinterface");
int32_t * objectref = (int32_t *)operand_stack_peek_u32(vm->current_frame, count);
assert(objectref != nullptr);
struct class_entry * class_entry = (struct class_entry *)objectref[0];
struct method_entry method_entry =
class_resolver_lookup_method_from_interfacemethodref_index(vm->class_hash_table.length,
vm->class_hash_table.entry,
index,
class_entry,
vm->current_frame->class_entry);
vm_special_method_call(vm, method_entry.class_entry, method_entry.method_info);
}
void op_invokespecial(struct vm * vm, uint32_t index)

7
c/frame.h
View File

@ -73,6 +73,13 @@ static inline void operand_stack_push_u32(struct frame * frame, uint32_t value)
frame->operand_stack_ix++;
}
static inline uint32_t operand_stack_peek_u32(struct frame * frame, int index)
{
assert((frame->operand_stack_ix - index) >= 0);
uint32_t value = frame->operand_stack[frame->operand_stack_ix - index];
return value;
}
static inline uint32_t operand_stack_pop_u32(struct frame * frame)
{
frame->operand_stack_ix--;

21
p/InvokeInterfaceTest.java Normal file
View File

@ -0,0 +1,21 @@
package p;
interface Op {
public int op(int a, int b);
}
class Foo implements Op {
public int op(int a, int b) {
return a + b;
}
}
public class InvokeInterfaceTest {
static int test(Op operator) {
return operator.op(5, 10);
}
public static void main() {
test(new Foo());
}
}