1 /* This file read a Java(TM) .class file.
2 It is not stand-alone: It depends on tons of macros, and the
3 intent is you #include this file after you've defined the macros.
5 Copyright (C) 1996 Free Software Foundation, Inc.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA.
22 Java and all Java-based marks are trademarks or registered trademarks
23 of Sun Microsystems, Inc. in the United States and other countries.
24 The Free Software Foundation is independent of Sun Microsystems, Inc. */
30 DEFUN(get_attribute, (jcf),
33 uint16 attribute_name = (JCF_FILL (jcf, 6), JCF_readu2 (jcf));
34 uint32 attribute_length = JCF_readu4 (jcf);
35 uint32 start_pos = JCF_TELL(jcf);
37 unsigned char *name_data;
38 JCF_FILL (jcf, (long) attribute_length);
39 if (attribute_name <= 0 || attribute_name >= JPOOL_SIZE(jcf))
41 if (JPOOL_TAG (jcf, attribute_name) != CONSTANT_Utf8)
43 name_length = JPOOL_UTF_LENGTH (jcf, attribute_name);
44 name_data = JPOOL_UTF_DATA (jcf, attribute_name);
46 #ifdef IGNORE_ATTRIBUTE
47 if (IGNORE_ATTRIBUTE (jcf, attribute_name, attribute_length))
49 JCF_SKIP (jcf, attribute_length);
53 #ifdef HANDLE_SOURCEFILE
54 if (name_length == 10 && memcmp (name_data, "SourceFile", 10) == 0)
56 uint16 sourcefile_index = JCF_readu2 (jcf);
57 HANDLE_SOURCEFILE(sourcefile_index);
61 #ifdef HANDLE_CONSTANTVALUE
62 if (name_length == 13 && memcmp (name_data, "ConstantValue", 13) == 0)
64 uint16 constantvalue_index = JCF_readu2 (jcf);
65 if (constantvalue_index <= 0 || constantvalue_index >= JPOOL_SIZE(jcf))
67 HANDLE_CONSTANTVALUE(constantvalue_index);
71 #ifdef HANDLE_CODE_ATTRIBUTE
72 if (name_length == 4 && memcmp (name_data, "Code", 4) == 0)
75 uint16 max_stack ATTRIBUTE_UNUSED = JCF_readu2 (jcf);
76 uint16 max_locals ATTRIBUTE_UNUSED = JCF_readu2 (jcf);
77 uint32 code_length = JCF_readu4 (jcf);
78 uint16 exception_table_length, attributes_count;
79 if (code_length + 12 > attribute_length)
81 HANDLE_CODE_ATTRIBUTE(max_stack, max_locals, code_length);
82 JCF_SKIP (jcf, code_length);
83 exception_table_length = JCF_readu2 (jcf);
84 if (code_length + 8 * exception_table_length + 12 > attribute_length)
86 #ifdef HANDLE_EXCEPTION_TABLE
87 HANDLE_EXCEPTION_TABLE (jcf->read_ptr, exception_table_length);
89 JCF_SKIP (jcf, 2 * 4 * exception_table_length);
90 attributes_count = JCF_readu2 (jcf);
91 for (j = 0; j < attributes_count; j++)
93 int code = get_attribute (jcf);
99 #endif /* HANDLE_CODE_ATTRIBUTE */
100 #ifdef HANDLE_EXCEPTIONS_ATTRIBUTE
101 if (name_length == 10 && memcmp (name_data, "Exceptions", 10) == 0)
103 uint16 count = JCF_readu2 (jcf);
104 HANDLE_EXCEPTIONS_ATTRIBUTE (count);
108 #ifdef HANDLE_LINENUMBERTABLE_ATTRIBUTE
109 if (name_length == 15 && memcmp (name_data, "LineNumberTable", 15) == 0)
111 uint16 count = JCF_readu2 (jcf);
112 HANDLE_LINENUMBERTABLE_ATTRIBUTE (count);
116 #ifdef HANDLE_LOCALVARIABLETABLE_ATTRIBUTE
117 if (name_length == 18 && memcmp (name_data, "LocalVariableTable", 18) == 0)
119 uint16 count = JCF_readu2 (jcf);
120 HANDLE_LOCALVARIABLETABLE_ATTRIBUTE (count);
125 #ifdef PROCESS_OTHER_ATTRIBUTE
126 PROCESS_OTHER_ATTRIBUTE(jcf, attribute_name, attribute_length);
128 JCF_SKIP (jcf, attribute_length);
131 if ((long) (start_pos + attribute_length) != JCF_TELL(jcf))
136 /* Read and handle the pre-amble. */
138 DEFUN(jcf_parse_preamble, (jcf),
141 uint32 magic = (JCF_FILL (jcf, 8), JCF_readu4 (jcf));
142 uint16 minor_version ATTRIBUTE_UNUSED = JCF_readu2 (jcf);
143 uint16 major_version ATTRIBUTE_UNUSED = JCF_readu2 (jcf);
145 HANDLE_MAGIC (magic, minor_version, major_version);
147 if (magic != 0xcafebabe)
153 /* Read and handle the constant pool.
156 Return -2 if a bad cross-reference (index of other constant) was seen.
159 DEFUN(jcf_parse_constant_pool, (jcf),
163 JPOOL_SIZE (jcf) = (JCF_FILL (jcf, 2), JCF_readu2 (jcf));
164 jcf->cpool.tags = ALLOC (JPOOL_SIZE (jcf));
165 jcf->cpool.data = ALLOC (sizeof (jword) * JPOOL_SIZE (jcf));
166 jcf->cpool.tags[0] = 0;
167 #ifdef HANDLE_START_CONSTANT_POOL
168 HANDLE_START_CONSTANT_POOL (JPOOL_SIZE (jcf));
170 for (i = 1; i < (int) JPOOL_SIZE (jcf); i++)
174 /* Make sure at least 9 bytes are available. This is enough
175 for all fixed-sized constant pool entries (so we don't need many
176 more JCF_FILL calls below), but is is small enough that
177 we are guaranteed to not hit EOF (in a valid .class file). */
179 constant_kind = JCF_readu (jcf);
180 jcf->cpool.tags[i] = constant_kind;
181 switch (constant_kind)
183 case CONSTANT_String:
185 jcf->cpool.data[i] = JCF_readu2 (jcf);
187 case CONSTANT_Fieldref:
188 case CONSTANT_Methodref:
189 case CONSTANT_InterfaceMethodref:
190 case CONSTANT_NameAndType:
191 jcf->cpool.data[i] = JCF_readu2 (jcf);
192 jcf->cpool.data[i] |= JCF_readu2 (jcf) << 16;
194 case CONSTANT_Integer:
196 jcf->cpool.data[i] = JCF_readu4 (jcf);
199 case CONSTANT_Double:
200 jcf->cpool.data[i] = JCF_readu4 (jcf);
201 i++; /* These take up two spots in the constant pool */
202 jcf->cpool.tags[i] = 0;
203 jcf->cpool.data[i] = JCF_readu4 (jcf);
206 n = JCF_readu2 (jcf);
208 #ifdef HANDLE_CONSTANT_Utf8
209 HANDLE_CONSTANT_Utf8(jcf, i, n);
211 jcf->cpool.data[i] = JCF_TELL(jcf) - 2;
222 /* Read various class flags and numbers. */
225 DEFUN(jcf_parse_class, (jcf),
229 uint16 interfaces_count;
231 jcf->access_flags = JCF_readu2 (jcf);
232 jcf->this_class = JCF_readu2 (jcf);
233 jcf->super_class = JCF_readu2 (jcf);
234 interfaces_count = JCF_readu2 (jcf);
236 #ifdef HANDLE_CLASS_INFO
237 HANDLE_CLASS_INFO(jcf->access_flags, jcf->this_class, jcf->super_class, interfaces_count);
240 JCF_FILL (jcf, 2 * interfaces_count);
242 /* Read interfaces. */
243 for (i = 0; i < interfaces_count; i++)
245 uint16 index ATTRIBUTE_UNUSED = JCF_readu2 (jcf);
246 #ifdef HANDLE_CLASS_INTERFACE
247 HANDLE_CLASS_INTERFACE (index);
254 DEFUN(jcf_parse_fields, (jcf),
260 fields_count = JCF_readu2 (jcf);
262 #ifdef HANDLE_START_FIELDS
263 HANDLE_START_FIELDS (fields_count);
265 for (i = 0; i < fields_count; i++)
267 uint16 access_flags = (JCF_FILL (jcf, 8), JCF_readu2 (jcf));
268 uint16 name_index = JCF_readu2 (jcf);
269 uint16 signature_index = JCF_readu2 (jcf);
270 uint16 attribute_count = JCF_readu2 (jcf);
271 #ifdef HANDLE_START_FIELD
272 HANDLE_START_FIELD (access_flags, name_index, signature_index,
275 for (j = 0; j < attribute_count; j++)
277 int code = get_attribute (jcf);
281 #ifdef HANDLE_END_FIELD
285 #ifdef HANDLE_END_FIELDS
286 HANDLE_END_FIELDS ();
294 DEFUN(jcf_parse_one_method, (jcf),
298 uint16 access_flags = (JCF_FILL (jcf, 8), JCF_readu2 (jcf));
299 uint16 name_index = JCF_readu2 (jcf);
300 uint16 signature_index = JCF_readu2 (jcf);
301 uint16 attribute_count = JCF_readu2 (jcf);
303 HANDLE_METHOD(access_flags, name_index, signature_index, attribute_count);
305 for (i = 0; i < attribute_count; i++)
307 int code = get_attribute (jcf);
311 #ifdef HANDLE_END_METHOD
312 HANDLE_END_METHOD ();
318 DEFUN(jcf_parse_methods, (jcf),
322 uint16 methods_count;
324 methods_count = JCF_readu2 (jcf);
325 #ifdef HANDLE_START_METHODS
326 HANDLE_START_METHODS (methods_count);
328 for (i = 0; i < methods_count; i++)
330 int code = jcf_parse_one_method (jcf);
334 #ifdef HANDLE_END_METHODS
335 HANDLE_END_METHODS ();
340 /* Read attributes. */
342 DEFUN(jcf_parse_final_attributes, (jcf),
346 uint16 attributes_count = (JCF_FILL (jcf, 2), JCF_readu2 (jcf));
347 #ifdef START_FINAL_ATTRIBUTES
348 START_FINAL_ATTRIBUTES (attributes_count)
350 for (i = 0; i < attributes_count; i++)
352 int code = get_attribute (jcf);