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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [gcc/] [java/] [jcf-reader.c] - Rev 856
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/* This file read a Java(TM) .class file. It is not stand-alone: It depends on tons of macros, and the intent is you #include this file after you've defined the macros. Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. Java and all Java-based marks are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries. The Free Software Foundation is independent of Sun Microsystems, Inc. */ #include "jcf.h" #include "zipfile.h" static int get_attribute (JCF *, int, jv_attr_type); static int jcf_parse_preamble (JCF *); static int jcf_parse_constant_pool (JCF *); static void jcf_parse_class (JCF *); static int jcf_parse_fields (JCF *); static int jcf_parse_one_method (JCF *, int); static int jcf_parse_methods (JCF *); static int jcf_parse_final_attributes (JCF *); #ifdef NEED_PEEK_ATTRIBUTE static int peek_attribute (JCF *, int, const char *, int); #endif #ifdef NEED_SKIP_ATTRIBUTE static void skip_attribute (JCF *, int); #endif /* Go through all available attribute (ATTRIBUTE_NUMER) and try to identify PEEKED_NAME. Return 1 if PEEKED_NAME was found, 0 otherwise. JCF is restored to its initial position before returning. */ #ifdef NEED_PEEK_ATTRIBUTE /* Not everyone uses this function */ static int peek_attribute (JCF *jcf, int attribute_number, const char *peeked_name, int peeked_name_length) { int to_return = 0; long absolute_offset = (long)JCF_TELL (jcf); int i; for (i = 0; !to_return && i < attribute_number; i++) { uint16 attribute_name = (JCF_FILL (jcf, 6), JCF_readu2 (jcf)); uint32 attribute_length = JCF_readu4 (jcf); int name_length; const unsigned char *name_data; JCF_FILL (jcf, (long) attribute_length); if (attribute_name <= 0 || attribute_name >= JPOOL_SIZE(jcf) || JPOOL_TAG (jcf, attribute_name) != CONSTANT_Utf8) continue; name_length = JPOOL_UTF_LENGTH (jcf, attribute_name); name_data = JPOOL_UTF_DATA (jcf, attribute_name); if (name_length == peeked_name_length && ! memcmp (name_data, peeked_name, peeked_name_length)) { to_return = 1; break; } JCF_SKIP (jcf, attribute_length); } JCF_SEEK (jcf, absolute_offset); return to_return; } #endif #ifdef NEED_SKIP_ATTRIBUTE /* Not everyone uses this function */ static void skip_attribute (JCF *jcf, int number_of_attribute) { while (number_of_attribute--) { JCF_u4 N; JCF_FILL (jcf, 6); (void) JCF_readu2 (jcf); N = JCF_readu4 (jcf); JCF_SKIP (jcf, N); } } #endif static int get_attribute (JCF *jcf, int index, jv_attr_type attr_type ATTRIBUTE_UNUSED) { uint16 attribute_name = (JCF_FILL (jcf, 6), JCF_readu2 (jcf)); uint32 attribute_length = JCF_readu4 (jcf); uint32 start_pos = JCF_TELL(jcf); int name_length; const unsigned char *name_data; JCF_FILL (jcf, (long) attribute_length); if (attribute_name <= 0 || attribute_name >= JPOOL_SIZE(jcf)) return -2; if (JPOOL_TAG (jcf, attribute_name) != CONSTANT_Utf8) return -2; name_length = JPOOL_UTF_LENGTH (jcf, attribute_name); name_data = JPOOL_UTF_DATA (jcf, attribute_name); #define MATCH_ATTRIBUTE(S) \ (name_length == sizeof (S)-1 && memcmp (name_data, S, sizeof (S)-1) == 0) #ifdef IGNORE_ATTRIBUTE if (IGNORE_ATTRIBUTE (jcf, attribute_name, attribute_length)) { JCF_SKIP (jcf, attribute_length); } else #endif #ifdef HANDLE_SOURCEFILE if (MATCH_ATTRIBUTE ("SourceFile")) { uint16 sourcefile_index = JCF_readu2 (jcf); HANDLE_SOURCEFILE(sourcefile_index); } else #endif #ifdef HANDLE_CONSTANTVALUE if (MATCH_ATTRIBUTE ("ConstantValue")) { uint16 constantvalue_index = JCF_readu2 (jcf); if (constantvalue_index <= 0 || constantvalue_index >= JPOOL_SIZE(jcf)) return -2; HANDLE_CONSTANTVALUE(constantvalue_index); } else #endif #ifdef HANDLE_CODE_ATTRIBUTE if (MATCH_ATTRIBUTE ("Code")) { uint16 j; uint16 max_stack ATTRIBUTE_UNUSED = JCF_readu2 (jcf); uint16 max_locals ATTRIBUTE_UNUSED = JCF_readu2 (jcf); uint32 code_length = JCF_readu4 (jcf); uint16 exception_table_length, attributes_count; if (code_length + 12 > attribute_length) return -1; HANDLE_CODE_ATTRIBUTE(max_stack, max_locals, code_length); JCF_SKIP (jcf, code_length); exception_table_length = JCF_readu2 (jcf); if (code_length + 8 * exception_table_length + 12 > attribute_length) return -1; #ifdef HANDLE_EXCEPTION_TABLE HANDLE_EXCEPTION_TABLE (jcf->read_ptr, exception_table_length); #endif JCF_SKIP (jcf, 2 * 4 * exception_table_length); attributes_count = JCF_readu2 (jcf); for (j = 0; j < attributes_count; j++) { int code = get_attribute (jcf, index, JV_METHOD_ATTR); if (code != 0) return code; } } else #endif /* HANDLE_CODE_ATTRIBUTE */ #ifdef HANDLE_EXCEPTIONS_ATTRIBUTE if (MATCH_ATTRIBUTE ("Exceptions")) { uint16 count = JCF_readu2 (jcf); HANDLE_EXCEPTIONS_ATTRIBUTE (count); } else #endif #ifdef HANDLE_LINENUMBERTABLE_ATTRIBUTE if (MATCH_ATTRIBUTE ("LineNumberTable")) { uint16 count = JCF_readu2 (jcf); HANDLE_LINENUMBERTABLE_ATTRIBUTE (count); } else #endif #ifdef HANDLE_LOCALVARIABLETABLE_ATTRIBUTE if (MATCH_ATTRIBUTE ("LocalVariableTable")) { uint16 count = JCF_readu2 (jcf); HANDLE_LOCALVARIABLETABLE_ATTRIBUTE (count); } else #endif #ifdef HANDLE_LOCALVARIABLETYPETABLE_ATTRIBUTE if (MATCH_ATTRIBUTE ("LocalVariableTypeTable")) { uint16 count = JCF_readu2 (jcf); HANDLE_LOCALVARIABLETYPETABLE_ATTRIBUTE (count); } else #endif #ifdef HANDLE_INNERCLASSES_ATTRIBUTE if (MATCH_ATTRIBUTE ("InnerClasses")) { uint16 count = JCF_readu2 (jcf); HANDLE_INNERCLASSES_ATTRIBUTE (count); } else #endif #ifdef HANDLE_SYNTHETIC_ATTRIBUTE if (MATCH_ATTRIBUTE ("Synthetic")) { HANDLE_SYNTHETIC_ATTRIBUTE (); } else #endif #ifdef HANDLE_GCJCOMPILED_ATTRIBUTE if (MATCH_ATTRIBUTE ("gnu.gcj.gcj-compiled")) { HANDLE_GCJCOMPILED_ATTRIBUTE (); } else #endif #ifdef HANDLE_DEPRECATED_ATTRIBUTE if (MATCH_ATTRIBUTE ("Deprecated")) { HANDLE_DEPRECATED_ATTRIBUTE (); } else #endif #ifdef HANDLE_SOURCEDEBUGEXTENSION_ATTRIBUTE if (MATCH_ATTRIBUTE ("SourceDebugExtension")) /* JSR 45 */ { HANDLE_SOURCEDEBUGEXTENSION_ATTRIBUTE (attribute_length); } else #endif #ifdef HANDLE_ENCLOSINGMETHOD_ATTRIBUTE if (MATCH_ATTRIBUTE ("EnclosingMethod")) { HANDLE_ENCLOSINGMETHOD_ATTRIBUTE (); } else #endif #ifdef HANDLE_SIGNATURE_ATTRIBUTE if (MATCH_ATTRIBUTE ("Signature")) { HANDLE_SIGNATURE_ATTRIBUTE (); } else #endif #ifdef HANDLE_RUNTIMEVISIBLEANNOTATIONS_ATTRIBUTE if (MATCH_ATTRIBUTE ("RuntimeVisibleAnnotations")) { HANDLE_RUNTIMEVISIBLEANNOTATIONS_ATTRIBUTE (); } else #endif #ifdef HANDLE_RUNTIMEINVISIBLEANNOTATIONS_ATTRIBUTE if (MATCH_ATTRIBUTE ("RuntimeInvisibleAnnotations")) { HANDLE_RUNTIMEINVISIBLEANNOTATIONS_ATTRIBUTE (); } else #endif #ifdef HANDLE_RUNTIMEVISIBLEPARAMETERANNOTATIONS_ATTRIBUTE if (MATCH_ATTRIBUTE ("RuntimeVisibleParameterAnnotations")) { HANDLE_RUNTIMEVISIBLEPARAMETERANNOTATIONS_ATTRIBUTE (); } else #endif #ifdef HANDLE_RUNTIMEINVISIBLEPARAMETERANNOTATIONS_ATTRIBUTE if (MATCH_ATTRIBUTE ("RuntimeInvisibleParameterAnnotations")) { HANDLE_RUNTIMEINVISIBLEPARAMETERANNOTATIONS_ATTRIBUTE (); } else #endif #ifdef HANDLE_ANNOTATIONDEFAULT_ATTRIBUTE if (MATCH_ATTRIBUTE ("AnnotationDefault")) { HANDLE_ANNOTATIONDEFAULT_ATTRIBUTE (); } else #endif { #ifdef PROCESS_OTHER_ATTRIBUTE PROCESS_OTHER_ATTRIBUTE(jcf, attribute_name, attribute_length); #else JCF_SKIP (jcf, attribute_length); #endif } if ((long) (start_pos + attribute_length) != JCF_TELL(jcf)) return -1; return 0; } /* Read and handle the pre-amble. */ static int jcf_parse_preamble (JCF* jcf) { uint32 magic = (JCF_FILL (jcf, 8), JCF_readu4 (jcf)); uint16 minor_version ATTRIBUTE_UNUSED = JCF_readu2 (jcf); uint16 major_version ATTRIBUTE_UNUSED = JCF_readu2 (jcf); #ifdef HANDLE_MAGIC HANDLE_MAGIC (magic, minor_version, major_version); #endif if (magic != 0xcafebabe) return -1; else return 0; } /* Read and handle the constant pool. Return 0 if OK. Return -2 if a bad cross-reference (index of other constant) was seen. */ static int jcf_parse_constant_pool (JCF* jcf) { int i, n; JPOOL_SIZE (jcf) = (JCF_FILL (jcf, 2), JCF_readu2 (jcf)); jcf->cpool.tags = GGC_NEWVAR (uint8, JPOOL_SIZE (jcf)); jcf->cpool.data = GGC_NEWVAR (union cpool_entry, sizeof (jword) * JPOOL_SIZE (jcf)); jcf->cpool.tags[0] = 0; #ifdef HANDLE_START_CONSTANT_POOL HANDLE_START_CONSTANT_POOL (JPOOL_SIZE (jcf)); #endif for (i = 1; i < (int) JPOOL_SIZE (jcf); i++) { int constant_kind; /* Make sure at least 9 bytes are available. This is enough for all fixed-sized constant pool entries (so we don't need many more JCF_FILL calls below), but is is small enough that we are guaranteed to not hit EOF (in a valid .class file). */ JCF_FILL (jcf, 9); constant_kind = JCF_readu (jcf); jcf->cpool.tags[i] = constant_kind; switch (constant_kind) { case CONSTANT_String: case CONSTANT_Class: jcf->cpool.data[i].w = JCF_readu2 (jcf); break; case CONSTANT_Fieldref: case CONSTANT_Methodref: case CONSTANT_InterfaceMethodref: case CONSTANT_NameAndType: jcf->cpool.data[i].w = JCF_readu2 (jcf); jcf->cpool.data[i].w |= JCF_readu2 (jcf) << 16; break; case CONSTANT_Integer: case CONSTANT_Float: jcf->cpool.data[i].w = JCF_readu4 (jcf); break; case CONSTANT_Long: case CONSTANT_Double: jcf->cpool.data[i].w = JCF_readu4 (jcf); i++; /* These take up two spots in the constant pool */ jcf->cpool.tags[i] = 0; jcf->cpool.data[i].w = JCF_readu4 (jcf); break; case CONSTANT_Utf8: n = JCF_readu2 (jcf); JCF_FILL (jcf, n); #ifdef HANDLE_CONSTANT_Utf8 HANDLE_CONSTANT_Utf8(jcf, i, n); #else jcf->cpool.data[i].w = JCF_TELL(jcf) - 2; JCF_SKIP (jcf, n); #endif break; default: return i; } } return 0; } /* Read various class flags and numbers. */ static void jcf_parse_class (JCF* jcf) { int i; uint16 interfaces_count; JCF_FILL (jcf, 8); jcf->access_flags = JCF_readu2 (jcf); jcf->this_class = JCF_readu2 (jcf); jcf->super_class = JCF_readu2 (jcf); interfaces_count = JCF_readu2 (jcf); #ifdef HANDLE_CLASS_INFO HANDLE_CLASS_INFO(jcf->access_flags, jcf->this_class, jcf->super_class, interfaces_count); #endif JCF_FILL (jcf, 2 * interfaces_count); /* Read interfaces. */ for (i = 0; i < interfaces_count; i++) { uint16 index ATTRIBUTE_UNUSED = JCF_readu2 (jcf); #ifdef HANDLE_CLASS_INTERFACE HANDLE_CLASS_INTERFACE (index); #endif } } /* Read fields. */ static int jcf_parse_fields (JCF* jcf) { int i, j; uint16 fields_count; JCF_FILL (jcf, 2); fields_count = JCF_readu2 (jcf); #ifdef HANDLE_START_FIELDS HANDLE_START_FIELDS (fields_count); #endif for (i = 0; i < fields_count; i++) { uint16 access_flags = (JCF_FILL (jcf, 8), JCF_readu2 (jcf)); uint16 name_index = JCF_readu2 (jcf); uint16 signature_index = JCF_readu2 (jcf); uint16 attribute_count = JCF_readu2 (jcf); #ifdef HANDLE_START_FIELD HANDLE_START_FIELD (access_flags, name_index, signature_index, attribute_count); #endif for (j = 0; j < attribute_count; j++) { int code = get_attribute (jcf, i, JV_FIELD_ATTR); if (code != 0) return code; } #ifdef HANDLE_END_FIELD HANDLE_END_FIELD (); #endif } #ifdef HANDLE_END_FIELDS HANDLE_END_FIELDS (); #endif return 0; } /* Read methods. */ static int jcf_parse_one_method (JCF* jcf, int index) { int i; uint16 access_flags = (JCF_FILL (jcf, 8), JCF_readu2 (jcf)); uint16 name_index = JCF_readu2 (jcf); uint16 signature_index = JCF_readu2 (jcf); uint16 attribute_count = JCF_readu2 (jcf); #ifdef HANDLE_METHOD HANDLE_METHOD(access_flags, name_index, signature_index, attribute_count); #endif for (i = 0; i < attribute_count; i++) { int code = get_attribute (jcf, index, JV_METHOD_ATTR); if (code != 0) return code; } #ifdef HANDLE_END_METHOD HANDLE_END_METHOD (); #endif return 0; } static int jcf_parse_methods (JCF* jcf) { int i; uint16 methods_count; JCF_FILL (jcf, 2); methods_count = JCF_readu2 (jcf); #ifdef HANDLE_START_METHODS HANDLE_START_METHODS (methods_count); #endif for (i = 0; i < methods_count; i++) { int code = jcf_parse_one_method (jcf, i); if (code != 0) return code; } #ifdef HANDLE_END_METHODS HANDLE_END_METHODS (); #endif return 0; } /* Read attributes. */ static int jcf_parse_final_attributes (JCF *jcf) { int i; uint16 attributes_count = (JCF_FILL (jcf, 2), JCF_readu2 (jcf)); #ifdef START_FINAL_ATTRIBUTES START_FINAL_ATTRIBUTES (attributes_count) #endif for (i = 0; i < attributes_count; i++) { int code = get_attribute (jcf, i, JV_CLASS_ATTR); if (code != 0) return code; } return 0; }
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