The SourceDebugExtension attribute is an optional attribute in the
attributes
table of the ClassFile structure. There can be no more than one
SourceDebugExtension attribute in the attributes table of a given
ClassFile structure.
The SourceDebugExtension attribute has the following format:
SourceDebugExtension_attribute {
u2 attribute_name_index;
u4 attribute_length;
u1 debug_extension[attribute_length];
}
The items of the SourceDebugExtension_attribute structure are as follows:
attribute_name_index
- The value of the
attribute_name_index item must be a valid index into the
constant_pool table. The constant_pool entry at that index must be a
CONSTANT_Utf8_info structure representing the string
"SourceDebugExtension".
attribute_length
- The value of the
attribute_length item indicates the length of
the attribute, excluding the initial six bytes. The value of the
attribute_length item is thus the number of bytes in
the debug_extension[] item.
debug_extension[]
- The
debug_extension array holds a string, which must be
in UTF-8 format. There is no terminating zero byte.
The string in the debug_extension item will be interpreted as
extended debugging information. The content of this string has no semantic
effect on the Java Virtual Machine.
|
