/* Parser for Java(TM) .class files. Copyright (C) 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 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 2, 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 COPYING. If not, write to the Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 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. */ /* Written by Per Bothner */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "tree.h" #include "real.h" #include "obstack.h" #include "flags.h" #include "java-except.h" #include "input.h" #include "java-tree.h" #include "toplev.h" #include "parse.h" #include "ggc.h" #include "debug.h" #include "assert.h" #include "tm_p.h" #include "cgraph.h" #ifdef HAVE_LOCALE_H #include #endif #ifdef HAVE_LANGINFO_CODESET #include #endif /* A CONSTANT_Utf8 element is converted to an IDENTIFIER_NODE at parse time. */ #define JPOOL_UTF(JCF, INDEX) CPOOL_UTF(&(JCF)->cpool, INDEX) #define JPOOL_UTF_LENGTH(JCF, INDEX) IDENTIFIER_LENGTH (JPOOL_UTF (JCF, INDEX)) #define JPOOL_UTF_DATA(JCF, INDEX) \ ((const unsigned char *) IDENTIFIER_POINTER (JPOOL_UTF (JCF, INDEX))) #define HANDLE_CONSTANT_Utf8(JCF, INDEX, LENGTH) \ do { \ unsigned char save; unsigned char *text; \ JCF_FILL (JCF, (LENGTH)+1); /* Make sure we read 1 byte beyond string. */ \ text = (JCF)->read_ptr; \ save = text[LENGTH]; \ text[LENGTH] = 0; \ (JCF)->cpool.data[INDEX].t = get_identifier ((const char *) text); \ text[LENGTH] = save; \ JCF_SKIP (JCF, LENGTH); } while (0) #include "jcf.h" extern struct obstack temporary_obstack; static GTY(()) tree parse_roots[3]; /* The FIELD_DECL for the current field. */ #define current_field parse_roots[0] /* The METHOD_DECL for the current method. */ #define current_method parse_roots[1] /* A list of TRANSLATION_UNIT_DECLs for the files to be compiled. */ #define current_file_list parse_roots[2] /* Line 0 in current file, if compiling from bytecode. */ static location_t file_start_location; /* The Java archive that provides main_class; the main input file. */ static GTY(()) struct JCF * main_jcf; static struct ZipFile *localToFile; /* Declarations of some functions used here. */ static void handle_innerclass_attribute (int count, JCF *); static tree give_name_to_class (JCF *jcf, int index); static char *compute_class_name (struct ZipDirectory *zdir); static int classify_zip_file (struct ZipDirectory *zdir); static void parse_zip_file_entries (void); static void process_zip_dir (FILE *); static void parse_source_file_1 (tree, const char *, FILE *); static void parse_source_file_2 (void); static void parse_source_file_3 (void); static void parse_class_file (void); static void handle_deprecated (void); static void set_source_filename (JCF *, int); static void jcf_parse (struct JCF*); static void load_inner_classes (tree); /* Handle "Deprecated" attribute. */ static void handle_deprecated (void) { if (current_field != NULL_TREE) FIELD_DEPRECATED (current_field) = 1; else if (current_method != NULL_TREE) METHOD_DEPRECATED (current_method) = 1; else if (current_class != NULL_TREE) CLASS_DEPRECATED (TYPE_NAME (current_class)) = 1; else { /* Shouldn't happen. */ gcc_unreachable (); } } /* Handle "SourceFile" attribute. */ static void set_source_filename (JCF *jcf, int index) { tree sfname_id = get_name_constant (jcf, index); const char *sfname = IDENTIFIER_POINTER (sfname_id); const char *old_filename = input_filename; int new_len = IDENTIFIER_LENGTH (sfname_id); if (old_filename != NULL) { int old_len = strlen (old_filename); /* Use the current input_filename (derived from the class name) if it has a directory prefix, but otherwise matches sfname. */ if (old_len > new_len && strcmp (sfname, old_filename + old_len - new_len) == 0 && (old_filename[old_len - new_len - 1] == '/' || old_filename[old_len - new_len - 1] == '\\')) { #ifndef USE_MAPPED_LOCATION DECL_SOURCE_LOCATION (TYPE_NAME (current_class)) = input_location; file_start_location = input_location; #endif return; } } if (strchr (sfname, '/') == NULL && strchr (sfname, '\\') == NULL) { const char *class_name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (current_class))); char *dot = strrchr (class_name, '.'); if (dot != NULL) { /* Length of prefix, not counting final dot. */ int i = dot - class_name; /* Concatenate current package prefix with new sfname. */ char *buf = XNEWVEC (char, i + new_len + 2); /* Space for '.' and '\0'. */ strcpy (buf + i + 1, sfname); /* Copy package from class_name, replacing '.' by DIR_SEPARATOR. Note we start at the end with the final package dot. */ for (; i >= 0; i--) { char c = class_name[i]; if (c == '.') c = DIR_SEPARATOR; buf[i] = c; } sfname_id = get_identifier (buf); free (buf); sfname = IDENTIFIER_POINTER (sfname_id); } } #ifdef USE_MAPPED_LOCATION line_table.maps[line_table.used-1].to_file = sfname; #else input_filename = sfname; DECL_SOURCE_LOCATION (TYPE_NAME (current_class)) = input_location; file_start_location = input_location; #endif if (current_class == main_class) main_input_filename = sfname; } #define HANDLE_SOURCEFILE(INDEX) set_source_filename (jcf, INDEX) #define HANDLE_CLASS_INFO(ACCESS_FLAGS, THIS, SUPER, INTERFACES_COUNT) \ { tree super_class = SUPER==0 ? NULL_TREE : get_class_constant (jcf, SUPER); \ output_class = current_class = give_name_to_class (jcf, THIS); \ set_super_info (ACCESS_FLAGS, current_class, super_class, INTERFACES_COUNT);} #define HANDLE_CLASS_INTERFACE(INDEX) \ add_interface (current_class, get_class_constant (jcf, INDEX)) #define HANDLE_START_FIELD(ACCESS_FLAGS, NAME, SIGNATURE, ATTRIBUTE_COUNT) \ { int sig_index = SIGNATURE; \ current_field = add_field (current_class, get_name_constant (jcf, NAME), \ parse_signature (jcf, sig_index), ACCESS_FLAGS); \ set_java_signature (TREE_TYPE (current_field), JPOOL_UTF (jcf, sig_index)); \ if ((ACCESS_FLAGS) & ACC_FINAL) \ MAYBE_CREATE_VAR_LANG_DECL_SPECIFIC (current_field); \ } #define HANDLE_END_FIELDS() \ (current_field = NULL_TREE) #define HANDLE_CONSTANTVALUE(INDEX) \ { tree constant; int index = INDEX; \ if (! flag_emit_class_files && JPOOL_TAG (jcf, index) == CONSTANT_String) { \ tree name = get_name_constant (jcf, JPOOL_USHORT1 (jcf, index)); \ constant = build_utf8_ref (name); \ } \ else \ constant = get_constant (jcf, index); \ set_constant_value (current_field, constant); } #define HANDLE_METHOD(ACCESS_FLAGS, NAME, SIGNATURE, ATTRIBUTE_COUNT) \ (current_method = add_method (current_class, ACCESS_FLAGS, \ get_name_constant (jcf, NAME), \ get_name_constant (jcf, SIGNATURE)), \ DECL_LOCALVARIABLES_OFFSET (current_method) = 0, \ DECL_LINENUMBERS_OFFSET (current_method) = 0) #define HANDLE_END_METHODS() \ { current_method = NULL_TREE; } #define HANDLE_CODE_ATTRIBUTE(MAX_STACK, MAX_LOCALS, CODE_LENGTH) \ { DECL_MAX_STACK (current_method) = (MAX_STACK); \ DECL_MAX_LOCALS (current_method) = (MAX_LOCALS); \ DECL_CODE_LENGTH (current_method) = (CODE_LENGTH); \ DECL_CODE_OFFSET (current_method) = JCF_TELL (jcf); } #define HANDLE_LOCALVARIABLETABLE_ATTRIBUTE(COUNT) \ { int n = (COUNT); \ DECL_LOCALVARIABLES_OFFSET (current_method) = JCF_TELL (jcf) - 2; \ JCF_SKIP (jcf, n * 10); } #define HANDLE_LINENUMBERTABLE_ATTRIBUTE(COUNT) \ { int n = (COUNT); \ DECL_LINENUMBERS_OFFSET (current_method) = JCF_TELL (jcf) - 2; \ JCF_SKIP (jcf, n * 4); } #define HANDLE_EXCEPTIONS_ATTRIBUTE(COUNT) \ { \ int n = COUNT; \ tree list = DECL_FUNCTION_THROWS (current_method); \ while (--n >= 0) \ { \ tree thrown_class = get_class_constant (jcf, JCF_readu2 (jcf)); \ list = tree_cons (NULL_TREE, thrown_class, list); \ } \ DECL_FUNCTION_THROWS (current_method) = nreverse (list); \ } #define HANDLE_DEPRECATED_ATTRIBUTE() handle_deprecated () /* Link seen inner classes to their outer context and register the inner class to its outer context. They will be later loaded. */ #define HANDLE_INNERCLASSES_ATTRIBUTE(COUNT) \ handle_innerclass_attribute (COUNT, jcf) #define HANDLE_SYNTHETIC_ATTRIBUTE() \ { \ /* Irrelevant decls should have been nullified by the END macros. \ We only handle the `Synthetic' attribute on method DECLs. \ DECL_ARTIFICIAL on fields is used for something else (See \ PUSH_FIELD in java-tree.h) */ \ if (current_method) \ DECL_ARTIFICIAL (current_method) = 1; \ } #define HANDLE_GCJCOMPILED_ATTRIBUTE() \ { \ if (current_class == object_type_node) \ jcf->right_zip = 1; \ } #include "jcf-reader.c" tree parse_signature (JCF *jcf, int sig_index) { gcc_assert (sig_index > 0 && sig_index < JPOOL_SIZE (jcf) && JPOOL_TAG (jcf, sig_index) == CONSTANT_Utf8); return parse_signature_string (JPOOL_UTF_DATA (jcf, sig_index), JPOOL_UTF_LENGTH (jcf, sig_index)); } tree get_constant (JCF *jcf, int index) { tree value; int tag; if (index <= 0 || index >= JPOOL_SIZE(jcf)) goto bad; tag = JPOOL_TAG (jcf, index); if ((tag & CONSTANT_ResolvedFlag) || tag == CONSTANT_Utf8) return jcf->cpool.data[index].t; switch (tag) { case CONSTANT_Integer: { jint num = JPOOL_INT(jcf, index); value = build_int_cst (int_type_node, num); break; } case CONSTANT_Long: { unsigned HOST_WIDE_INT num = JPOOL_UINT (jcf, index); unsigned HOST_WIDE_INT lo; HOST_WIDE_INT hi; lshift_double (num, 0, 32, 64, &lo, &hi, 0); num = JPOOL_UINT (jcf, index+1); add_double (lo, hi, num, 0, &lo, &hi); value = build_int_cst_wide (long_type_node, lo, hi); value = force_fit_type (value, 0, false, false); break; } case CONSTANT_Float: { jint num = JPOOL_INT(jcf, index); long buf = num; REAL_VALUE_TYPE d; real_from_target_fmt (&d, &buf, &ieee_single_format); value = build_real (float_type_node, d); break; } case CONSTANT_Double: { long buf[2], lo, hi; REAL_VALUE_TYPE d; hi = JPOOL_UINT (jcf, index); lo = JPOOL_UINT (jcf, index+1); if (FLOAT_WORDS_BIG_ENDIAN) buf[0] = hi, buf[1] = lo; else buf[0] = lo, buf[1] = hi; real_from_target_fmt (&d, buf, &ieee_double_format); value = build_real (double_type_node, d); break; } case CONSTANT_String: { tree name = get_name_constant (jcf, JPOOL_USHORT1 (jcf, index)); const char *utf8_ptr = IDENTIFIER_POINTER (name); int utf8_len = IDENTIFIER_LENGTH (name); const unsigned char *utf8; int i; /* Check for a malformed Utf8 string. */ utf8 = (const unsigned char *) utf8_ptr; i = utf8_len; while (i > 0) { int char_len = UT8_CHAR_LENGTH (*utf8); if (char_len < 0 || char_len > 3 || char_len > i) fatal_error ("bad string constant"); utf8 += char_len; i -= char_len; } /* Allocate a new string value. */ value = build_string (utf8_len, utf8_ptr); TREE_TYPE (value) = build_pointer_type (string_type_node); } break; default: goto bad; } JPOOL_TAG (jcf, index) = tag | CONSTANT_ResolvedFlag; jcf->cpool.data[index].t = value; return value; bad: internal_error ("bad value constant type %d, index %d", JPOOL_TAG (jcf, index), index); } tree get_name_constant (JCF *jcf, int index) { tree name = get_constant (jcf, index); gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE); return name; } /* Handle reading innerclass attributes. If a nonzero entry (denoting a non anonymous entry) is found, We augment the inner class list of the outer context with the newly resolved innerclass. */ static void handle_innerclass_attribute (int count, JCF *jcf) { int c = (count); while (c--) { /* Read inner_class_info_index. This may be 0 */ int icii = JCF_readu2 (jcf); /* Read outer_class_info_index. If the innerclasses attribute entry isn't a member (like an inner class) the value is 0. */ int ocii = JCF_readu2 (jcf); /* Read inner_name_index. If the class we're dealing with is an anonymous class, it must be 0. */ int ini = JCF_readu2 (jcf); /* Read the access flag. */ int acc = JCF_readu2 (jcf); /* If icii is 0, don't try to read the class. */ if (icii >= 0) { tree class = get_class_constant (jcf, icii); tree decl = TYPE_NAME (class); /* Skip reading further if ocii is null */ if (DECL_P (decl) && !CLASS_COMPLETE_P (decl) && ocii) { tree outer = TYPE_NAME (get_class_constant (jcf, ocii)); tree alias = (ini ? get_name_constant (jcf, ini) : NULL_TREE); set_class_decl_access_flags (acc, decl); DECL_CONTEXT (decl) = outer; DECL_INNER_CLASS_LIST (outer) = tree_cons (decl, alias, DECL_INNER_CLASS_LIST (outer)); CLASS_COMPLETE_P (decl) = 1; } } } } static tree give_name_to_class (JCF *jcf, int i) { gcc_assert (i > 0 && i < JPOOL_SIZE (jcf) && JPOOL_TAG (jcf, i) == CONSTANT_Class); { tree package_name = NULL_TREE, tmp; tree this_class; int j = JPOOL_USHORT1 (jcf, i); /* verify_constant_pool confirmed that j is a CONSTANT_Utf8. */ tree class_name = unmangle_classname ((const char *) JPOOL_UTF_DATA (jcf, j), JPOOL_UTF_LENGTH (jcf, j)); this_class = lookup_class (class_name); #ifdef USE_MAPPED_LOCATION { tree source_name = identifier_subst (class_name, "", '.', '/', ".java"); const char *sfname = IDENTIFIER_POINTER (source_name); linemap_add (&line_table, LC_ENTER, false, sfname, 0); input_location = linemap_line_start (&line_table, 0, 1); file_start_location = input_location; DECL_SOURCE_LOCATION (TYPE_NAME (this_class)) = input_location; if (main_input_filename == NULL && jcf == main_jcf) main_input_filename = sfname; } #else input_location = DECL_SOURCE_LOCATION (TYPE_NAME (this_class)); if (main_input_filename == NULL && jcf == main_jcf) main_input_filename = input_filename; #endif jcf->cpool.data[i].t = this_class; JPOOL_TAG (jcf, i) = CONSTANT_ResolvedClass; split_qualified_name (&package_name, &tmp, DECL_NAME (TYPE_NAME (this_class))); TYPE_PACKAGE (this_class) = package_name; return this_class; } } /* Get the class of the CONSTANT_Class whose constant pool index is I. */ tree get_class_constant (JCF *jcf, int i) { tree type; gcc_assert (i > 0 && i < JPOOL_SIZE (jcf) && (JPOOL_TAG (jcf, i) & ~CONSTANT_ResolvedFlag) == CONSTANT_Class); if (JPOOL_TAG (jcf, i) != CONSTANT_ResolvedClass) { int name_index = JPOOL_USHORT1 (jcf, i); /* verify_constant_pool confirmed that name_index is a CONSTANT_Utf8. */ const char *name = (const char *) JPOOL_UTF_DATA (jcf, name_index); int nlength = JPOOL_UTF_LENGTH (jcf, name_index); if (name[0] == '[') /* Handle array "classes". */ type = TREE_TYPE (parse_signature_string ((const unsigned char *) name, nlength)); else { tree cname = unmangle_classname (name, nlength); type = lookup_class (cname); } jcf->cpool.data[i].t = type; JPOOL_TAG (jcf, i) = CONSTANT_ResolvedClass; } else type = jcf->cpool.data[i].t; return type; } /* Read a class with the fully qualified-name NAME. Return 1 iff we read the requested file. (It is still possible we failed if the file did not define the class it is supposed to.) */ int read_class (tree name) { JCF this_jcf, *jcf; tree icv, class = NULL_TREE; tree save_current_class = current_class; tree save_output_class = output_class; location_t save_location = input_location; JCF *save_current_jcf = current_jcf; if ((icv = IDENTIFIER_CLASS_VALUE (name)) != NULL_TREE) { class = TREE_TYPE (icv); jcf = TYPE_JCF (class); } else jcf = NULL; if (jcf == NULL) { const char* path_name; this_jcf.zipd = NULL; jcf = &this_jcf; path_name = find_class (IDENTIFIER_POINTER (name), IDENTIFIER_LENGTH (name), &this_jcf, 1); if (path_name == 0) return 0; else free((char *) path_name); } current_jcf = jcf; if (current_jcf->java_source) { const char *filename = current_jcf->filename; char *real_path; tree given_file, real_file; FILE *finput; int generate; java_parser_context_save_global (); java_push_parser_context (); given_file = get_identifier (filename); filename = IDENTIFIER_POINTER (given_file); real_path = lrealpath (filename); real_file = get_identifier (real_path); free (real_path); generate = IS_A_COMMAND_LINE_FILENAME_P (given_file); output_class = current_class = NULL_TREE; current_function_decl = NULL_TREE; if (! HAS_BEEN_ALREADY_PARSED_P (real_file)) { if (! (finput = fopen (filename, "r"))) fatal_error ("can't reopen %s: %m", filename); parse_source_file_1 (real_file, filename, finput); parse_source_file_2 (); parse_source_file_3 (); if (fclose (finput)) fatal_error ("can't close %s: %m", input_filename); #ifdef USE_MAPPED_LOCATION linemap_add (&line_table, LC_LEAVE, false, NULL, 0); #endif } JCF_FINISH (current_jcf); java_pop_parser_context (generate); java_parser_context_restore_global (); } else { if (class == NULL_TREE || ! CLASS_PARSED_P (class)) { java_parser_context_save_global (); java_push_parser_context (); output_class = current_class = class; ctxp->save_location = input_location; if (JCF_SEEN_IN_ZIP (current_jcf)) read_zip_member(current_jcf, current_jcf->zipd, current_jcf->zipd->zipf); jcf_parse (current_jcf); /* Parsing might change the class, in which case we have to put it back where we found it. */ if (current_class != class && icv != NULL_TREE) TREE_TYPE (icv) = current_class; class = current_class; java_pop_parser_context (0); java_parser_context_restore_global (); } layout_class (class); load_inner_classes (class); } output_class = save_output_class; current_class = save_current_class; input_location = save_location; current_jcf = save_current_jcf; return 1; } /* Load CLASS_OR_NAME. CLASS_OR_NAME can be a mere identifier if called from the parser, otherwise it's a RECORD_TYPE node. If VERBOSE is 1, print error message on failure to load a class. */ void load_class (tree class_or_name, int verbose) { tree name, saved; int class_loaded = 0; tree class_decl = NULL_TREE; bool is_compiled_class = false; /* We've already failed, don't try again. */ if (TREE_CODE (class_or_name) == RECORD_TYPE && TYPE_DUMMY (class_or_name)) return; /* class_or_name can be the name of the class we want to load */ if (TREE_CODE (class_or_name) == IDENTIFIER_NODE) name = class_or_name; /* In some cases, it's a dependency that we process earlier that we though */ else if (TREE_CODE (class_or_name) == TREE_LIST) name = TYPE_NAME (TREE_PURPOSE (class_or_name)); /* Or it's a type in the making */ else name = DECL_NAME (TYPE_NAME (class_or_name)); class_decl = IDENTIFIER_CLASS_VALUE (name); if (class_decl != NULL_TREE) { tree type = TREE_TYPE (class_decl); is_compiled_class = ((TYPE_JCF (type) && JCF_SEEN_IN_ZIP (TYPE_JCF (type))) || CLASS_FROM_CURRENTLY_COMPILED_P (type)); } /* If the class is from source code, then it must already be loaded. */ class_decl = IDENTIFIER_CLASS_VALUE (name); if (class_decl && CLASS_FROM_SOURCE_P (TREE_TYPE (class_decl))) return; saved = name; /* If flag_verify_invocations is unset, we don't try to load a class unless we're looking for Object (which is fixed by the ABI) or it's a class that we're going to compile. */ if (flag_verify_invocations || class_or_name == object_type_node || is_compiled_class || TREE_CODE (class_or_name) == IDENTIFIER_NODE) { while (1) { char *separator; /* We've already loaded it. */ if (IDENTIFIER_CLASS_VALUE (name) != NULL_TREE) { tree tmp_decl = IDENTIFIER_CLASS_VALUE (name); if (CLASS_PARSED_P (TREE_TYPE (tmp_decl))) break; } if (read_class (name)) break; /* We failed loading name. Now consider that we might be looking for an inner class. */ if ((separator = strrchr (IDENTIFIER_POINTER (name), '$')) || (separator = strrchr (IDENTIFIER_POINTER (name), '.'))) { int c = *separator; *separator = '\0'; name = get_identifier (IDENTIFIER_POINTER (name)); *separator = c; } /* Otherwise, we failed, we bail. */ else break; } { /* have we found the class we're looking for? */ tree type_decl = IDENTIFIER_CLASS_VALUE (saved); tree type = type_decl ? TREE_TYPE (type_decl) : NULL; class_loaded = type && CLASS_PARSED_P (type); } } if (!class_loaded) { if (flag_verify_invocations || ! flag_indirect_dispatch || flag_emit_class_files) { if (verbose) error ("cannot find file for class %s", IDENTIFIER_POINTER (saved)); } else if (verbose) { /* This is just a diagnostic during testing, not a real problem. */ if (!quiet_flag) warning (0, "cannot find file for class %s", IDENTIFIER_POINTER (saved)); /* Fake it. */ if (TREE_CODE (class_or_name) == RECORD_TYPE) { set_super_info (0, class_or_name, object_type_node, 0); TYPE_DUMMY (class_or_name) = 1; /* We won't be able to output any debug info for this class. */ DECL_IGNORED_P (TYPE_NAME (class_or_name)) = 1; } } } } /* Parse the .class file JCF. */ static void jcf_parse (JCF* jcf) { int i, code; if (jcf_parse_preamble (jcf) != 0) fatal_error ("not a valid Java .class file"); code = jcf_parse_constant_pool (jcf); if (code != 0) fatal_error ("error while parsing constant pool"); code = verify_constant_pool (jcf); if (code > 0) fatal_error ("error in constant pool entry #%d\n", code); jcf_parse_class (jcf); if (main_class == NULL_TREE) main_class = current_class; if (! quiet_flag && TYPE_NAME (current_class)) fprintf (stderr, " %s %s", (jcf->access_flags & ACC_INTERFACE) ? "interface" : "class", IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (current_class)))); if (CLASS_PARSED_P (current_class)) { /* FIXME - where was first time */ fatal_error ("reading class %s for the second time from %s", IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (current_class))), jcf->filename); } CLASS_PARSED_P (current_class) = 1; for (i = 1; i < JPOOL_SIZE(jcf); i++) { switch (JPOOL_TAG (jcf, i)) { case CONSTANT_Class: get_class_constant (jcf, i); break; } } code = jcf_parse_fields (jcf); if (code != 0) fatal_error ("error while parsing fields"); code = jcf_parse_methods (jcf); if (code != 0) fatal_error ("error while parsing methods"); code = jcf_parse_final_attributes (jcf); if (code != 0) fatal_error ("error while parsing final attributes"); #ifdef USE_MAPPED_LOCATION linemap_add (&line_table, LC_LEAVE, false, NULL, 0); #endif /* The fields of class_type_node are already in correct order. */ if (current_class != class_type_node && current_class != object_type_node) TYPE_FIELDS (current_class) = nreverse (TYPE_FIELDS (current_class)); if (current_class == object_type_node) { layout_class_methods (object_type_node); /* If we don't have the right archive, emit a verbose warning. If we're generating bytecode, emit the warning only if -fforce-classes-archive-check was specified. */ if (!jcf->right_zip && (!flag_emit_class_files || flag_force_classes_archive_check)) fatal_error ("the % that was found in %qs didn't have the special zero-length % attribute. This generally means that your classpath is incorrectly set. Use % to see the info page describing how to set the classpath", jcf->filename); } else all_class_list = tree_cons (NULL_TREE, TYPE_NAME (current_class), all_class_list ); } /* If we came across inner classes, load them now. */ static void load_inner_classes (tree cur_class) { tree current; for (current = DECL_INNER_CLASS_LIST (TYPE_NAME (cur_class)); current; current = TREE_CHAIN (current)) { tree name = DECL_NAME (TREE_PURPOSE (current)); tree decl = IDENTIFIER_GLOBAL_VALUE (name); if (decl && ! CLASS_LOADED_P (TREE_TYPE (decl)) && !CLASS_BEING_LAIDOUT (TREE_TYPE (decl))) load_class (name, 1); } } static void duplicate_class_warning (const char *filename) { location_t warn_loc; #ifdef USE_MAPPED_LOCATION linemap_add (&line_table, LC_RENAME, 0, filename, 0); warn_loc = linemap_line_start (&line_table, 0, 1); #else warn_loc.file = filename; warn_loc.line = 0; #endif warning (0, "%Hduplicate class will only be compiled once", &warn_loc); } static void parse_class_file (void) { tree method; location_t save_location = input_location; java_layout_seen_class_methods (); input_location = DECL_SOURCE_LOCATION (TYPE_NAME (current_class)); file_start_location = input_location; (*debug_hooks->start_source_file) (input_line, input_filename); gen_indirect_dispatch_tables (current_class); java_mark_class_local (current_class); for (method = TYPE_METHODS (current_class); method != NULL_TREE; method = TREE_CHAIN (method)) { JCF *jcf = current_jcf; if (METHOD_ABSTRACT (method) || METHOD_DUMMY (method)) continue; if (METHOD_NATIVE (method)) { tree arg; int decl_max_locals; if (! flag_jni) continue; /* We need to compute the DECL_MAX_LOCALS. We need to take the wide types into account too. */ for (arg = TYPE_ARG_TYPES (TREE_TYPE (method)), decl_max_locals = 0; arg != end_params_node; arg = TREE_CHAIN (arg), decl_max_locals += 1) { if (TREE_VALUE (arg) && TYPE_IS_WIDE (TREE_VALUE (arg))) decl_max_locals += 1; } DECL_MAX_LOCALS (method) = decl_max_locals; start_java_method (method); give_name_to_locals (jcf); *get_stmts () = build_jni_stub (method); end_java_method (); continue; } if (DECL_CODE_OFFSET (method) == 0) { current_function_decl = method; error ("missing Code attribute"); continue; } input_location = DECL_SOURCE_LOCATION (TYPE_NAME (current_class)); if (DECL_LINENUMBERS_OFFSET (method)) { int i; int min_line = 0; unsigned char *ptr; JCF_SEEK (jcf, DECL_LINENUMBERS_OFFSET (method)); linenumber_count = i = JCF_readu2 (jcf); linenumber_table = ptr = jcf->read_ptr; for (ptr += 2; --i >= 0; ptr += 4) { int line = GET_u2 (ptr); /* Set initial input_line to smallest linenumber. * Needs to be set before init_function_start. */ if (min_line == 0 || line < min_line) min_line = line; } #ifdef USE_MAPPED_LOCATION if (min_line != 0) input_location = linemap_line_start (&line_table, min_line, 1); #else if (min_line != 0) input_line = min_line; #endif } else { linenumber_table = NULL; linenumber_count = 0; } start_java_method (method); note_instructions (jcf, method); give_name_to_locals (jcf); /* Bump up start_label_pc_this_method so we get a unique label number and reset highest_label_pc_this_method. */ if (highest_label_pc_this_method >= 0) { /* We adjust to the next multiple of 1000. This is just a frill so the last 3 digits of the label number match the bytecode offset, which might make debugging marginally more convenient. */ start_label_pc_this_method = ((((start_label_pc_this_method + highest_label_pc_this_method) / 1000) + 1) * 1000); highest_label_pc_this_method = -1; } /* Convert bytecode to trees. */ expand_byte_code (jcf, method); end_java_method (); } if (flag_emit_class_files) write_classfile (current_class); finish_class (); (*debug_hooks->end_source_file) (LOCATION_LINE (save_location)); input_location = save_location; } /* Parse a source file, as pointed by the current value of INPUT_FILENAME. */ static void parse_source_file_1 (tree real_file, const char *filename, FILE *finput) { int save_error_count = java_error_count; /* Mark the file as parsed. */ HAS_BEEN_ALREADY_PARSED_P (real_file) = 1; lang_init_source (1); /* Error msgs have no method prototypes */ /* There's no point in trying to find the current encoding unless we are going to do something intelligent with it -- hence the test for iconv. */ #if defined (HAVE_LOCALE_H) && defined (HAVE_ICONV) && defined (HAVE_LANGINFO_CODESET) setlocale (LC_CTYPE, ""); if (current_encoding == NULL) current_encoding = nl_langinfo (CODESET); #endif if (current_encoding == NULL || *current_encoding == '\0') current_encoding = DEFAULT_ENCODING; #ifdef USE_MAPPED_LOCATION linemap_add (&line_table, LC_ENTER, false, filename, 0); input_location = linemap_line_start (&line_table, 0, 125); #else input_filename = filename; input_line = 0; #endif ctxp->file_start_location = input_location; ctxp->filename = filename; jcf_dependency_add_file (input_filename, 0); /* Initialize the parser */ java_init_lex (finput, current_encoding); java_parse_abort_on_error (); java_parse (); /* Parse and build partial tree nodes. */ java_parse_abort_on_error (); } /* Process a parsed source file, resolving names etc. */ static void parse_source_file_2 (void) { int save_error_count = java_error_count; flag_verify_invocations = true; java_complete_class (); /* Parse unsatisfied class decl. */ java_parse_abort_on_error (); } static void parse_source_file_3 (void) { int save_error_count = java_error_count; java_check_circular_reference (); /* Check on circular references */ java_parse_abort_on_error (); java_fix_constructors (); /* Fix the constructors */ java_parse_abort_on_error (); java_reorder_fields (); /* Reorder the fields */ } void add_predefined_file (tree name) { predef_filenames = tree_cons (NULL_TREE, name, predef_filenames); } int predefined_filename_p (tree node) { tree iter; for (iter = predef_filenames; iter != NULL_TREE; iter = TREE_CHAIN (iter)) { if (TREE_VALUE (iter) == node) return 1; } return 0; } /* Generate a function that does all static initialization for this translation unit. */ static void java_emit_static_constructor (void) { tree body = NULL; emit_register_classes (&body); write_resource_constructor (&body); if (body) cgraph_build_static_cdtor ('I', body, DEFAULT_INIT_PRIORITY); } void java_parse_file (int set_yydebug ATTRIBUTE_UNUSED) { int filename_count = 0; location_t save_location = input_location; char *file_list = NULL, *list, *next; tree node; FILE *finput = NULL; int in_quotes = 0; if (flag_filelist_file) { int avail = 2000; finput = fopen (main_input_filename, "r"); if (finput == NULL) fatal_error ("can't open %s: %m", input_filename); list = XNEWVEC (char, avail); next = list; for (;;) { int count; if (avail < 500) { count = next - list; avail = 2 * (count + avail); list = xrealloc (list, avail); next = list + count; avail = avail - count; } /* Subtract to to guarantee space for final '\0'. */ count = fread (next, 1, avail - 1, finput); if (count == 0) { if (! feof (finput)) fatal_error ("error closing %s: %m", input_filename); *next = '\0'; break; } avail -= count; next += count; } fclose (finput); finput = NULL; file_list = list; } else list = (char *) main_input_filename; while (list) { for (next = list; ; ) { char ch = *next; if (flag_filelist_file && ! in_quotes && (ch == '\n' || ch == '\r' || ch == '\t' || ch == ' ' || ch == '&') /* FIXME */) { if (next == list) { next++; list = next; continue; } else { *next++ = '\0'; break; } } if (flag_filelist_file && ch == '"') { in_quotes = ! in_quotes; *next++ = '\0'; if (in_quotes) list = next; else break; } if (ch == '\0') { next = NULL; break; } next++; } if (list[0]) { node = get_identifier (list); filename_count++; /* Exclude file that we see twice on the command line. */ if (IS_A_COMMAND_LINE_FILENAME_P (node)) duplicate_class_warning (IDENTIFIER_POINTER (node)); else { tree file_decl = build_decl (TRANSLATION_UNIT_DECL, node, NULL); TREE_CHAIN (file_decl) = current_file_list; current_file_list = file_decl; IS_A_COMMAND_LINE_FILENAME_P (node) = 1; } } list = next; } if (file_list != NULL) free (file_list); if (filename_count == 0) warning (0, "no input file specified"); if (resource_name) { const char *resource_filename; /* Only one resource file may be compiled at a time. */ assert (TREE_CHAIN (current_file_list) == NULL); resource_filename = IDENTIFIER_POINTER (DECL_NAME (current_file_list)); compile_resource_file (resource_name, resource_filename); goto finish; } current_jcf = main_jcf; current_file_list = nreverse (current_file_list); for (node = current_file_list; node; node = TREE_CHAIN (node)) { unsigned char magic_string[4]; char *real_path; uint32 magic = 0; tree name = DECL_NAME (node); tree real_file; const char *filename = IDENTIFIER_POINTER (name); /* Skip already parsed files */ real_path = lrealpath (filename); real_file = get_identifier (real_path); free (real_path); if (HAS_BEEN_ALREADY_PARSED_P (real_file)) continue; /* Close previous descriptor, if any */ if (finput && fclose (finput)) fatal_error ("can't close input file %s: %m", main_input_filename); finput = fopen (filename, "rb"); if (finput == NULL) fatal_error ("can't open %s: %m", filename); #ifdef IO_BUFFER_SIZE setvbuf (finput, xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE); #endif /* Figure what kind of file we're dealing with */ if (fread (magic_string, 1, 4, finput) == 4) { fseek (finput, 0L, SEEK_SET); magic = GET_u4 (magic_string); } if (magic == 0xcafebabe) { CLASS_FILE_P (node) = 1; current_jcf = ggc_alloc (sizeof (JCF)); JCF_ZERO (current_jcf); current_jcf->read_state = finput; current_jcf->filbuf = jcf_filbuf_from_stdio; jcf_parse (current_jcf); DECL_SOURCE_LOCATION (node) = file_start_location; TYPE_JCF (current_class) = current_jcf; if (CLASS_FROM_CURRENTLY_COMPILED_P (current_class)) { /* We've already compiled this class. */ duplicate_class_warning (filename); continue; } CLASS_FROM_CURRENTLY_COMPILED_P (current_class) = 1; TREE_TYPE (node) = current_class; } else if (magic == (JCF_u4)ZIPMAGIC) { main_jcf = ggc_alloc (sizeof (JCF)); JCF_ZERO (main_jcf); main_jcf->read_state = finput; main_jcf->filbuf = jcf_filbuf_from_stdio; #ifdef USE_MAPPED_LOCATION linemap_add (&line_table, LC_ENTER, false, filename, 0); input_location = linemap_line_start (&line_table, 0, 1); #endif if (open_in_zip (main_jcf, filename, NULL, 0) < 0) fatal_error ("bad zip/jar file %s", filename); localToFile = SeenZipFiles; /* Register all the classes defined there. */ process_zip_dir (main_jcf->read_state); #ifdef USE_MAPPED_LOCATION linemap_add (&line_table, LC_LEAVE, false, NULL, 0); #endif parse_zip_file_entries (); } else { java_push_parser_context (); java_parser_context_save_global (); parse_source_file_1 (real_file, filename, finput); java_parser_context_restore_global (); java_pop_parser_context (1); #ifdef USE_MAPPED_LOCATION linemap_add (&line_table, LC_LEAVE, false, NULL, 0); #endif } } for (ctxp = ctxp_for_generation; ctxp; ctxp = ctxp->next) { input_location = ctxp->file_start_location; parse_source_file_2 (); } for (ctxp = ctxp_for_generation; ctxp; ctxp = ctxp->next) { input_location = ctxp->file_start_location; parse_source_file_3 (); } for (node = current_file_list; node; node = TREE_CHAIN (node)) { input_location = DECL_SOURCE_LOCATION (node); if (CLASS_FILE_P (node)) { /* FIXME: These two flags really should be independent. We should be able to compile fully binary compatible, but with flag_verify_invocations on. */ flag_verify_invocations = ! flag_indirect_dispatch; output_class = current_class = TREE_TYPE (node); current_jcf = TYPE_JCF (current_class); layout_class (current_class); load_inner_classes (current_class); parse_class_file (); JCF_FINISH (current_jcf); } } input_location = save_location; java_expand_classes (); if (java_report_errors () || flag_syntax_only) return; /* Expand all classes compiled from source. */ java_finish_classes (); finish: /* Arrange for any necessary initialization to happen. */ java_emit_static_constructor (); /* Only finalize the compilation unit after we've told cgraph which functions have their addresses stored. */ cgraph_finalize_compilation_unit (); cgraph_optimize (); } /* Return the name of the class corresponding to the name of the file in this zip entry. The result is newly allocated using ALLOC. */ static char * compute_class_name (struct ZipDirectory *zdir) { char *class_name_in_zip_dir = ZIPDIR_FILENAME (zdir); char *class_name; int i; int filename_length = zdir->filename_length; while (filename_length > 2 && strncmp (class_name_in_zip_dir, "./", 2) == 0) { class_name_in_zip_dir += 2; filename_length -= 2; } filename_length -= strlen (".class"); class_name = XNEWVEC (char, filename_length + 1); memcpy (class_name, class_name_in_zip_dir, filename_length); class_name [filename_length] = '\0'; for (i = 0; i < filename_length; i++) if (class_name[i] == '/') class_name[i] = '.'; return class_name; } /* Return 0 if we should skip this entry, 1 if it is a .class file, 2 if it is a property file of some sort. */ static int classify_zip_file (struct ZipDirectory *zdir) { char *class_name_in_zip_dir = ZIPDIR_FILENAME (zdir); if (zdir->filename_length > 6 && !strncmp (&class_name_in_zip_dir[zdir->filename_length - 6], ".class", 6)) return 1; /* For now we drop the manifest, but not other information. */ if (zdir->filename_length == 20 && !strncmp (class_name_in_zip_dir, "META-INF/MANIFEST.MF", 20)) return 0; /* Drop directory entries. */ if (zdir->filename_length > 0 && class_name_in_zip_dir[zdir->filename_length - 1] == '/') return 0; return 2; } /* Process all class entries found in the zip file. */ static void parse_zip_file_entries (void) { struct ZipDirectory *zdir; int i; for (i = 0, zdir = (ZipDirectory *)localToFile->central_directory; i < localToFile->count; i++, zdir = ZIPDIR_NEXT (zdir)) { tree class; switch (classify_zip_file (zdir)) { case 0: continue; case 1: { char *class_name = compute_class_name (zdir); class = lookup_class (get_identifier (class_name)); FREE (class_name); current_jcf = TYPE_JCF (class); output_class = current_class = class; if (CLASS_FROM_CURRENTLY_COMPILED_P (current_class)) { /* We've already compiled this class. */ duplicate_class_warning (current_jcf->filename); break; } CLASS_FROM_CURRENTLY_COMPILED_P (current_class) = 1; /* This is a dummy class, and now we're compiling it for real. */ gcc_assert (! TYPE_DUMMY (class)); /* This is for a corner case where we have a superclass but no superclass fields. This can happen if we earlier failed to lay out this class because its superclass was still in the process of being laid out; this occurs when we have recursive class dependencies via inner classes. Setting TYPE_SIZE to null here causes CLASS_LOADED_P to return false, so layout_class() will be called again. */ if (TYPE_SIZE (class) && CLASSTYPE_SUPER (class) && integer_zerop (TYPE_SIZE (class))) TYPE_SIZE (class) = NULL_TREE; if (! CLASS_LOADED_P (class)) { if (! CLASS_PARSED_P (class)) { read_zip_member (current_jcf, zdir, localToFile); jcf_parse (current_jcf); } layout_class (current_class); load_inner_classes (current_class); } if (TYPE_SIZE (current_class) != error_mark_node) { parse_class_file (); free (current_jcf->buffer); /* No longer necessary */ /* Note: there is a way to free this buffer right after a class seen in a zip file has been parsed. The idea is the set its jcf in such a way that buffer will be reallocated the time the code for the class will be generated. FIXME. */ } } break; case 2: { char *file_name, *class_name_in_zip_dir, *buffer; JCF *jcf; file_name = XNEWVEC (char, zdir->filename_length + 1); class_name_in_zip_dir = ZIPDIR_FILENAME (zdir); strncpy (file_name, class_name_in_zip_dir, zdir->filename_length); file_name[zdir->filename_length] = '\0'; jcf = XNEW (JCF); JCF_ZERO (jcf); jcf->read_state = finput; jcf->filbuf = jcf_filbuf_from_stdio; jcf->java_source = 0; jcf->classname = NULL; jcf->filename = file_name; jcf->zipd = zdir; if (read_zip_member (jcf, zdir, localToFile) < 0) fatal_error ("error while reading %s from zip file", file_name); buffer = XNEWVEC (char, zdir->filename_length + 1 + (jcf->buffer_end - jcf->buffer)); strcpy (buffer, file_name); /* This is not a typo: we overwrite the trailing \0 of the file name; this is just how the data is laid out. */ memcpy (buffer + zdir->filename_length, jcf->buffer, jcf->buffer_end - jcf->buffer); compile_resource_data (file_name, buffer, jcf->buffer_end - jcf->buffer); JCF_FINISH (jcf); free (jcf); free (buffer); } break; default: gcc_unreachable (); } } } /* Read all the entries of the zip file, creates a class and a JCF. Sets the jcf up for further processing and link it to the created class. */ static void process_zip_dir (FILE *finput) { int i; ZipDirectory *zdir; for (i = 0, zdir = (ZipDirectory *)localToFile->central_directory; i < localToFile->count; i++, zdir = ZIPDIR_NEXT (zdir)) { char *class_name, *file_name, *class_name_in_zip_dir; tree class; JCF *jcf; class_name_in_zip_dir = ZIPDIR_FILENAME (zdir); /* Here we skip non-class files; we handle them later. */ if (classify_zip_file (zdir) != 1) continue; class_name = compute_class_name (zdir); file_name = XNEWVEC (char, zdir->filename_length+1); jcf = ggc_alloc (sizeof (JCF)); JCF_ZERO (jcf); strncpy (file_name, class_name_in_zip_dir, zdir->filename_length); file_name [zdir->filename_length] = '\0'; class = lookup_class (get_identifier (class_name)); jcf->read_state = finput; jcf->filbuf = jcf_filbuf_from_stdio; jcf->java_source = 0; jcf->classname = class_name; jcf->filename = file_name; jcf->zipd = zdir; TYPE_JCF (class) = jcf; } } /* Initialization. */ void init_jcf_parse (void) { init_src_parse (); } #include "gt-java-jcf-parse.h"