BootstrapMethods and printing
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parent
5228c765ef
commit
af118981c4
97
classfile.c
97
classfile.c
@ -63,11 +63,28 @@ stack_frame_type stack_frame_type_enum(u2 frame_type) {
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}
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}
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ATTRIBUTE_TAGS attribute_tag(char* name) {
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for (size_t i = 1; i < ATTRIBUTE_TAGS_END; i++) {
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if (strcmp(ATTRIBUTE_TAGS_STRINGS[i - 1], name) == 0)
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return (ATTRIBUTE_TAGS)i;
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}
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return UNKNOWN;
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}
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char* constant_to_string(ClassFile* cf, cp_info info) {}
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void parse_attribute(ClassFile* cf, attribute_info* base, FILE* file) {
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char* name = (char*)cf->constant_pool[base->attribute_name_index - 1].info.utf8_info.bytes;
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if (strcmp("ConstantValue", name) == 0) {
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base->_tag = attribute_tag(name);
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switch (base->_tag) {
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case UNKNOWN:
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printf("unhandled attribute type: %s\n", name);
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fseek(file, base->attribute_length, SEEK_CUR);
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break;
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case CONSTANT_VALUE:
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read_u2(&(base->info.constant_value_attribute.constantvalue_index), 1, file);
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} else if (strcmp("Code", name) == 0) {
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break;
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case CODE:
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read_u2(&(base->info.code_attribute.max_stack), 2, file);
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read_u4(&(base->info.code_attribute.code_length), 1, file);
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base->info.code_attribute.code = (u1*)malloc(base->info.code_attribute.code_length);
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@ -85,7 +102,8 @@ void parse_attribute(ClassFile* cf, attribute_info* base, FILE* file) {
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read_u4(&(attr->attribute_length), 1, file);
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parse_attribute(cf, attr, file);
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}
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} else if (strcmp("StackMapTable", name) == 0) {
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break;
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case STACK_MAP_TABLE:
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read_u2(&(base->info.stack_map_table_attribute.number_of_entries), 1, file);
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base->info.stack_map_table_attribute.entries = malloc(sizeof(stack_map_frame) * base->info.stack_map_table_attribute.number_of_entries);
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for (u2 i = 0; i < base->info.stack_map_table_attribute.number_of_entries; i++) {
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@ -156,19 +174,36 @@ void parse_attribute(ClassFile* cf, attribute_info* base, FILE* file) {
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break;
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}
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}
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} else if (strcmp("NestHost", name) == 0) {
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break;
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case BOOTSTRAP_METHODS: {
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BootstrapMethods_attribute* attr = &base->info.bootstrap_methods_attribute;
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read_u2(&(attr->num_bootstrap_methods), 1, file);
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attr->bootstrap_methods = malloc(sizeof(BootstrapMethod) * attr->num_bootstrap_methods);
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for (u2 i = 0; i < attr->num_bootstrap_methods; i++) {
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BootstrapMethod* method = &attr->bootstrap_methods[i];
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read_u2(&(method->bootstrap_method_ref), 2, file);
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method->bootstrap_arguments = malloc(sizeof(u2) * method->num_bootstrap_arguments);
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read_u2(method->bootstrap_arguments, method->num_bootstrap_arguments, file);
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}
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break;
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}
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case NEST_HOST:
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read_u2(&(base->info.nest_host_attribute.host_class_index), 1, file);
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} else if (strcmp("NestMembers", name) == 0) {
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break;
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case NEST_MEMBERS:
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read_u2(&(base->info.nest_members_attribute.number_of_classes), 1, file);
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base->info.nest_members_attribute.classes = malloc(sizeof(u2) * base->info.nest_members_attribute.number_of_classes);
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read_u2(base->info.nest_members_attribute.classes, base->info.nest_members_attribute.number_of_classes, file);
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} else if (strcmp("PermittedSubclasses", name) == 0) {
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break;
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case PERMITTED_SUBCLASSES:
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read_u2(&(base->info.permitted_subclasses_attribute.number_of_classes), 1, file);
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base->info.permitted_subclasses_attribute.classes = malloc(sizeof(u2) * base->info.permitted_subclasses_attribute.number_of_classes);
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read_u2(base->info.permitted_subclasses_attribute.classes, base->info.permitted_subclasses_attribute.number_of_classes, file);
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} else {
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printf("unhandled attribute type: %s\n", name);
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fseek(file, base->attribute_length, SEEK_CUR);
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break;
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case ATTRIBUTE_TAGS_END:
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assert(0);
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}
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}
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@ -362,10 +397,12 @@ void ClassFile_info(const ClassFile* cf) {
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case CONSTANT_Long:
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merged = merge_bytes(cf->constant_pool[i].info.long_info.high_bytes, cf->constant_pool[i].info.long_info.low_bytes);
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printf("\t%ld\n", *(long*)&merged);
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i++;
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break;
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case CONSTANT_Double:
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merged = merge_bytes(cf->constant_pool[i].info.double_info.high_bytes, cf->constant_pool[i].info.double_info.low_bytes);
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printf("\t%lf\n", *(double*)&merged);
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i++;
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break;
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case CONSTANT_Class:
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printf("\t#%hu\t\t\t// %s\n", cf->constant_pool[i].info.class_info.name_index,
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@ -393,9 +430,51 @@ void ClassFile_info(const ClassFile* cf) {
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}
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}
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// class
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char* this_name = (char*)cf->constant_pool[cf->constant_pool[cf->this_class - 1].info.class_info.name_index - 1].info.utf8_info.bytes;
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char* super_name =
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cf->super_class != 0 ? (char*)cf->constant_pool[cf->constant_pool[cf->super_class - 1].info.class_info.name_index - 1].info.utf8_info.bytes : NULL;
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char* type = (cf->access_flags & ACC_INTERFACE ? "interface" : (cf->access_flags & ACC_ENUM ? "enum" : (cf->access_flags & ACC_MODULE ? "module" : "class")));
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printf("%s%s%s%s %s%s%s ", cf->access_flags & ACC_PUBLIC ? "public " : "", cf->access_flags & ACC_FINAL ? "final " : "",
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cf->access_flags & ACC_ABSTRACT ? "abstract " : "", type, this_name, super_name ? " extends " : "", super_name ? super_name : "");
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// interfaces
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if (cf->interfaces_count > 0)
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printf("implements ");
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for (u2 i = 0; i < cf->interfaces_count; i++) {
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printf("%s ", cf->constant_pool[cf->interfaces[i] - 1].info.utf8_info.bytes);
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}
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printf("{\n");
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// fields
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for (u2 i = 0; i < cf->fields_count; i++) {
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u2 flags = cf->fields[i].access_flags;
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char* access = flags & ACC_PUBLIC ? "public" : flags & ACC_PRIVATE ? "private" : flags & ACC_PROTECTED ? "protected" : "";
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char* descriptor = (char*)cf->constant_pool[cf->fields[i].descriptor_index - 1].info.utf8_info.bytes;
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char* name = (char*)cf->constant_pool[cf->fields[i].name_index - 1].info.utf8_info.bytes;
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printf("\t%s %s%s%s%s %s", access, flags & ACC_STATIC ? "static " : "", flags & ACC_FINAL ? "final " : "", flags & ACC_VOLATLE ? "volatile " : "",
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descriptor, name);
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for (u2 j = 0; j < cf->fields[i].attributes_count; j++) {
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switch (cf->fields[i].attributes[j]._tag) {
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case CONSTANT_VALUE:
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break;
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case BOOTSTRAP_METHODS:
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break;
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case NEST_HOST:
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break;
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case NEST_MEMBERS:
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break;
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case PERMITTED_SUBCLASSES:
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break;
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default:
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break;
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}
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}
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printf(";\n");
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}
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// methods
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}
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25
classfile.h
25
classfile.h
@ -261,12 +261,14 @@ typedef struct {
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} StackMapTable_attribute;
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typedef struct {
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u2 num_bootstrap_methods;
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struct {
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u2 bootstrap_method_ref;
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u2 num_bootstrap_arguments;
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u2* bootstrap_arguments;
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} * bootstrap_methods;
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} BootstrapMethod;
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typedef struct {
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u2 num_bootstrap_methods;
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BootstrapMethod* bootstrap_methods;
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} BootstrapMethods_attribute;
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typedef struct {
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@ -283,9 +285,26 @@ typedef struct {
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u2* classes;
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} PermittedSubclasses_attribute;
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typedef enum {
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UNKNOWN,
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CONSTANT_VALUE,
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CODE,
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STACK_MAP_TABLE,
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BOOTSTRAP_METHODS,
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NEST_HOST,
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NEST_MEMBERS,
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PERMITTED_SUBCLASSES,
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ATTRIBUTE_TAGS_END
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} ATTRIBUTE_TAGS;
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static const char* ATTRIBUTE_TAGS_STRINGS[] = {
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"ConstantValue", "Code", "StackMapTable", "BootstrapMethods", "NestHost", "NestMembers", "PermittedSubclasses",
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};
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typedef struct {
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u2 attribute_name_index;
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u4 attribute_length;
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ATTRIBUTE_TAGS _tag;
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union {
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ConstantValue_attribute constant_value_attribute;
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Code_attribute code_attribute;
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