/* Java(TM) language-specific utility routines. Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. This file is part of GNU CC. GNU CC 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. GNU CC 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 GNU CC; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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. */ /* Hacked by Per Bothner February 1996. */ #include "config.h" #include "system.h" #include "tree.h" #include "input.h" #include "rtl.h" #include "expr.h" #include "java-tree.h" #include "jcf.h" #include "toplev.h" #include "flags.h" #include "xref.h" #include "ggc.h" #include "diagnostic.h" struct string_option { const char *string; int *variable; int on_value; }; static void java_init PARAMS ((void)); static void java_init_options PARAMS ((void)); static int java_decode_option PARAMS ((int, char **)); static void put_decl_string PARAMS ((const char *, int)); static void put_decl_node PARAMS ((tree)); static void java_dummy_print PARAMS ((diagnostic_context *, const char *)); static void lang_print_error PARAMS ((diagnostic_context *, const char *)); static int process_option_with_no PARAMS ((char *, struct string_option *, int)); #ifndef TARGET_OBJECT_SUFFIX # define TARGET_OBJECT_SUFFIX ".o" #endif /* Table indexed by tree code giving a string containing a character classifying the tree code. Possibilities are t, d, s, c, r, <, 1 and 2. See java/java-tree.def for details. */ #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE, char java_tree_code_type[] = { 'x', #include "java-tree.def" }; #undef DEFTREECODE /* Table indexed by tree code giving number of expression operands beyond the fixed part of the node structure. Not used for types or decls. */ #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH, int java_tree_code_length[] = { 0, #include "java-tree.def" }; #undef DEFTREECODE /* Names of tree components. Used for printing out the tree and error messages. */ #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME, const char *java_tree_code_name[] = { "@@dummy", #include "java-tree.def" }; #undef DEFTREECODE int compiling_from_source; const char * const language_string = "GNU Java"; int flag_emit_class_files = 0; /* Nonzero if input file is a file with a list of filenames to compile. */ int flag_filelist_file = 0; /* When non zero, we emit xref strings. Values of the flag for xref backends are defined in xref_flag_table, xref.c. */ int flag_emit_xref = 0; /* When non zero, -Wall was turned on. */ int flag_wall = 0; /* When non zero, check for redundant modifier uses. */ int flag_redundant = 0; /* When non zero, call a library routine to do integer divisions. */ int flag_use_divide_subroutine = 1; /* When non zero, generate code for the Boehm GC. */ int flag_use_boehm_gc = 0; /* When non zero, assume the runtime uses a hash table to map an object to its synchronization structure. */ int flag_hash_synchronization; /* When non zero, assume all native functions are implemented with JNI, not CNI. */ int flag_jni = 0; /* When non zero, warn when source file is newer than matching class file. */ int flag_newer = 1; /* When non zero, generate checks for references to NULL. */ int flag_check_references = 0; /* The encoding of the source file. */ const char *current_encoding = NULL; /* When non zero, report the now deprecated empty statements. */ int flag_extraneous_semicolon; /* When non zero, always check for a non gcj generated classes archive. */ int flag_force_classes_archive_check; /* Table of language-dependent -f options. STRING is the option name. VARIABLE is the address of the variable. ON_VALUE is the value to store in VARIABLE if `-fSTRING' is seen as an option. (If `-fno-STRING' is seen as an option, the opposite value is stored.) */ static struct string_option lang_f_options[] = { {"emit-class-file", &flag_emit_class_files, 1}, {"emit-class-files", &flag_emit_class_files, 1}, {"filelist-file", &flag_filelist_file, 1}, {"use-divide-subroutine", &flag_use_divide_subroutine, 1}, {"use-boehm-gc", &flag_use_boehm_gc, 1}, {"hash-synchronization", &flag_hash_synchronization, 1}, {"jni", &flag_jni, 1}, {"check-references", &flag_check_references, 1}, {"force-classes-archive-check", &flag_force_classes_archive_check, 1} }; static struct string_option lang_W_options[] = { { "redundant-modifiers", &flag_redundant, 1 }, { "extraneous-semicolon", &flag_extraneous_semicolon, 1 }, { "out-of-date", &flag_newer, 1 } }; JCF *current_jcf; /* Variable controlling how dependency tracking is enabled in init_parse. */ static int dependency_tracking = 0; /* Flag values for DEPENDENCY_TRACKING. */ #define DEPEND_SET_FILE 1 #define DEPEND_ENABLE 2 #define DEPEND_TARGET_SET 4 #define DEPEND_FILE_ALREADY_SET 8 /* Each front end provides its own. */ struct lang_hooks lang_hooks = {java_init, NULL, /* java_finish */ java_init_options, java_decode_option, NULL /* post_options */}; /* Process an option that can accept a `no-' form. Return 1 if option found, 0 otherwise. */ static int process_option_with_no (p, table, table_size) char *p; struct string_option *table; int table_size; { int j; for (j = 0; j < table_size; j++) { if (!strcmp (p, table[j].string)) { *table[j].variable = table[j].on_value; return 1; } if (p[0] == 'n' && p[1] == 'o' && p[2] == '-' && ! strcmp (p+3, table[j].string)) { *table[j].variable = ! table[j].on_value; return 1; } } return 0; } /* * process java-specific compiler command-line options * return 0, but do not complain if the option is not recognised. */ static int java_decode_option (argc, argv) int argc __attribute__ ((__unused__)); char **argv; { char *p = argv[0]; #define CLARG "-fassume-compiled=" if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0) { add_assume_compiled (p + sizeof (CLARG) - 1, 0); return 1; } #undef CLARG #define CLARG "-fno-assume-compiled=" if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0) { add_assume_compiled (p + sizeof (CLARG) - 1, 1); return 1; } #undef CLARG #define CLARG "-fassume-compiled" if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0) { add_assume_compiled ("", 0); return 1; } #undef CLARG #define CLARG "-fno-assume-compiled" if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0) { add_assume_compiled ("", 1); return 1; } #undef CLARG #define CLARG "-fclasspath=" if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0) { jcf_path_classpath_arg (p + sizeof (CLARG) - 1); return 1; } #undef CLARG #define CLARG "-fCLASSPATH=" if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0) { jcf_path_CLASSPATH_arg (p + sizeof (CLARG) - 1); return 1; } #undef CLARG else if (strncmp (p, "-I", 2) == 0) { jcf_path_include_arg (p + 2); return 1; } #define ARG "-foutput-class-dir=" if (strncmp (p, ARG, sizeof (ARG) - 1) == 0) { jcf_write_base_directory = p + sizeof (ARG) - 1; return 1; } #undef ARG #define ARG "-fencoding=" if (strncmp (p, ARG, sizeof (ARG) - 1) == 0) { current_encoding = p + sizeof (ARG) - 1; return 1; } #undef ARG if (p[0] == '-' && p[1] == 'f') { /* Some kind of -f option. P's value is the option sans `-f'. Search for it in the table of options. */ p += 2; return process_option_with_no (p, lang_f_options, ARRAY_SIZE (lang_f_options)); } if (strcmp (p, "-Wall") == 0) { flag_wall = 1; flag_redundant = 1; flag_extraneous_semicolon = 1; /* When -Wall given, enable -Wunused. We do this because the C compiler does it, and people expect it. */ set_Wunused (1); return 1; } if (p[0] == '-' && p[1] == 'W') { /* Skip `-W' and see if we accept the option or its `no-' form. */ p += 2; return process_option_with_no (p, lang_W_options, ARRAY_SIZE (lang_W_options)); } if (strcmp (p, "-MD") == 0) { jcf_dependency_init (1); dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE; return 1; } else if (strcmp (p, "-MMD") == 0) { jcf_dependency_init (0); dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE; return 1; } else if (strcmp (p, "-M") == 0) { jcf_dependency_init (1); dependency_tracking |= DEPEND_ENABLE; return 1; } else if (strcmp (p, "-MM") == 0) { jcf_dependency_init (0); dependency_tracking |= DEPEND_ENABLE; return 1; } else if (strcmp (p, "-MP") == 0) { jcf_dependency_print_dummies (); return 1; } else if (strcmp (p, "-MT") == 0) { jcf_dependency_set_target (argv[1]); dependency_tracking |= DEPEND_TARGET_SET; return 2; } else if (strcmp (p, "-MF") == 0) { jcf_dependency_set_dep_file (argv[1]); dependency_tracking |= DEPEND_FILE_ALREADY_SET; return 2; } return 0; } /* Global open file. */ FILE *finput; const char * init_parse (filename) const char *filename; { /* Open input file. */ if (filename == 0 || !strcmp (filename, "-")) { finput = stdin; filename = "stdin"; if (dependency_tracking) error ("can't do dependency tracking with input from stdin"); } else { if (dependency_tracking) { char *dot; /* If the target is set and the output filename is set, then there's no processing to do here. Otherwise we must compute one or the other. */ if (! ((dependency_tracking & DEPEND_TARGET_SET) && (dependency_tracking & DEPEND_FILE_ALREADY_SET))) { dot = strrchr (filename, '.'); if (dot == NULL) error ("couldn't determine target name for dependency tracking"); else { char *buf = (char *) xmalloc (dot - filename + 3 + sizeof (TARGET_OBJECT_SUFFIX)); strncpy (buf, filename, dot - filename); /* If emitting class files, we might have multiple targets. The class generation code takes care of registering them. Otherwise we compute the target name here. */ if ((dependency_tracking & DEPEND_TARGET_SET)) ; /* Nothing. */ else if (flag_emit_class_files) jcf_dependency_set_target (NULL); else { strcpy (buf + (dot - filename), TARGET_OBJECT_SUFFIX); jcf_dependency_set_target (buf); } if ((dependency_tracking & DEPEND_FILE_ALREADY_SET)) ; /* Nothing. */ else if ((dependency_tracking & DEPEND_SET_FILE)) { strcpy (buf + (dot - filename), ".d"); jcf_dependency_set_dep_file (buf); } else jcf_dependency_set_dep_file ("-"); free (buf); } } } } init_lex (); return filename; } void finish_parse () { jcf_dependency_write (); } /* Buffer used by lang_printable_name. */ static char *decl_buf = NULL; /* Allocated size of decl_buf. */ static int decl_buflen = 0; /* Length of used part of decl_buf; position for next character. */ static int decl_bufpos = 0; /* Append the string STR to decl_buf. It length is given by LEN; -1 means the string is nul-terminated. */ static void put_decl_string (str, len) const char *str; int len; { if (len < 0) len = strlen (str); if (decl_bufpos + len >= decl_buflen) { if (decl_buf == NULL) { decl_buflen = len + 100; decl_buf = (char *) xmalloc (decl_buflen); } else { decl_buflen *= 2; decl_buf = (char *) xrealloc (decl_buf, decl_buflen); } } strcpy (decl_buf + decl_bufpos, str); decl_bufpos += len; } /* Append to decl_buf a printable name for NODE. */ static void put_decl_node (node) tree node; { int was_pointer = 0; if (TREE_CODE (node) == POINTER_TYPE) { node = TREE_TYPE (node); was_pointer = 1; } if (TREE_CODE_CLASS (TREE_CODE (node)) == 'd' && DECL_NAME (node) != NULL_TREE) { /* We want to print the type the DECL belongs to. We don't do that when we handle constructors. */ if (TREE_CODE (node) == FUNCTION_DECL && ! DECL_CONSTRUCTOR_P (node) && ! DECL_ARTIFICIAL (node) && DECL_CONTEXT (node)) { put_decl_node (TYPE_NAME (DECL_CONTEXT (node))); put_decl_string (".", 1); } if (! DECL_CONSTRUCTOR_P (node)) put_decl_node (DECL_NAME (node)); if (TREE_CODE (node) == FUNCTION_DECL && TREE_TYPE (node) != NULL_TREE) { int i = 0; tree args = TYPE_ARG_TYPES (TREE_TYPE (node)); if (TREE_CODE (TREE_TYPE (node)) == METHOD_TYPE) args = TREE_CHAIN (args); put_decl_string ("(", 1); for ( ; args != end_params_node; args = TREE_CHAIN (args), i++) { if (i > 0) put_decl_string (",", 1); put_decl_node (TREE_VALUE (args)); } put_decl_string (")", 1); } } else if (TREE_CODE_CLASS (TREE_CODE (node)) == 't' && TYPE_NAME (node) != NULL_TREE) { if (TREE_CODE (node) == RECORD_TYPE && TYPE_ARRAY_P (node)) { put_decl_node (TYPE_ARRAY_ELEMENT (node)); put_decl_string("[]", 2); } else if (node == promoted_byte_type_node) put_decl_string ("byte", 4); else if (node == promoted_short_type_node) put_decl_string ("short", 5); else if (node == promoted_char_type_node) put_decl_string ("char", 4); else if (node == promoted_boolean_type_node) put_decl_string ("boolean", 7); else if (node == void_type_node && was_pointer) put_decl_string ("null", 4); else put_decl_node (TYPE_NAME (node)); } else if (TREE_CODE (node) == IDENTIFIER_NODE) put_decl_string (IDENTIFIER_POINTER (node), IDENTIFIER_LENGTH (node)); else put_decl_string ("", -1); } /* Return a user-friendly name for DECL. The resulting string is only valid until the next call. The value of the hook decl_printable_name is this function, which is also called directly by lang_print_error. */ const char * lang_printable_name (decl, v) tree decl; int v __attribute__ ((__unused__)); { decl_bufpos = 0; put_decl_node (decl); put_decl_string ("", 1); return decl_buf; } /* Does the same thing that lang_printable_name, but add a leading space to the DECL name string -- With Leading Space. */ const char * lang_printable_name_wls (decl, v) tree decl; int v __attribute__ ((__unused__)); { decl_bufpos = 1; put_decl_node (decl); put_decl_string ("", 1); decl_buf [0] = ' '; return decl_buf; } /* Print on stderr the current class and method context. This function is the value of the hook print_error_function, called from toplev.c. */ static void lang_print_error (context, file) diagnostic_context *context __attribute__((__unused__)); const char *file; { static tree last_error_function_context = NULL_TREE; static tree last_error_function = NULL; static int initialized_p; /* Register LAST_ERROR_FUNCTION_CONTEXT and LAST_ERROR_FUNCTION with the garbage collector. */ if (!initialized_p) { ggc_add_tree_root (&last_error_function_context, 1); ggc_add_tree_root (&last_error_function, 1); initialized_p = 1; } if (current_function_decl != NULL && DECL_CONTEXT (current_function_decl) != last_error_function_context) { if (file) fprintf (stderr, "%s: ", file); last_error_function_context = DECL_CONTEXT (current_function_decl); fprintf (stderr, "In class `%s':\n", lang_printable_name (last_error_function_context, 0)); } if (last_error_function != current_function_decl) { if (file) fprintf (stderr, "%s: ", file); if (current_function_decl == NULL) fprintf (stderr, "At top level:\n"); else { const char *name = lang_printable_name (current_function_decl, 2); fprintf (stderr, "In method `%s':\n", name); } last_error_function = current_function_decl; } } static void java_init () { #if 0 extern int flag_minimal_debug; flag_minimal_debug = 0; #endif jcf_path_init (); jcf_path_seal (); decl_printable_name = lang_printable_name; print_error_function = lang_print_error; lang_expand_expr = java_lang_expand_expr; /* Append to Gcc tree node definition arrays */ memcpy (tree_code_type + (int) LAST_AND_UNUSED_TREE_CODE, java_tree_code_type, (int)LAST_JAVA_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE); memcpy (tree_code_length + (int) LAST_AND_UNUSED_TREE_CODE, java_tree_code_length, (LAST_JAVA_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (int)); memcpy (tree_code_name + (int) LAST_AND_UNUSED_TREE_CODE, java_tree_code_name, (LAST_JAVA_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (char *)); using_eh_for_cleanups (); } /* This doesn't do anything on purpose. It's used to satisfy the print_error_function hook we don't print error messages with bogus function prototypes. */ static void java_dummy_print (c, s) diagnostic_context *c __attribute__ ((__unused__)); const char *s __attribute__ ((__unused__)); { } /* Called to install the PRINT_ERROR_FUNCTION hook differently according to LEVEL. LEVEL is 1 during early parsing, when function prototypes aren't fully resolved. print_error_function is set so it doesn't print incomplete function prototypes. When LEVEL is 2, function prototypes are fully resolved and can be printed when reporting errors. */ void lang_init_source (level) int level; { if (level == 1) print_error_function = java_dummy_print; else print_error_function = lang_print_error; } static void java_init_options () { flag_bounds_check = 1; flag_exceptions = 1; flag_non_call_exceptions = 1; } const char * lang_identify () { return "Java"; } /* Hooks for print_node. */ void print_lang_decl (file, node, indent) FILE *file __attribute ((__unused__)); tree node __attribute ((__unused__)); int indent __attribute ((__unused__)); { } void print_lang_type (file, node, indent) FILE *file __attribute ((__unused__)); tree node __attribute ((__unused__)); int indent __attribute ((__unused__)); { } void print_lang_identifier (file, node, indent) FILE *file __attribute ((__unused__)); tree node __attribute ((__unused__)); int indent __attribute ((__unused__)); { } void print_lang_statistics () { } /* used by print-tree.c */ void lang_print_xnode (file, node, indent) FILE *file __attribute ((__unused__)); tree node __attribute ((__unused__)); int indent __attribute ((__unused__)); { } /* Return the typed-based alias set for T, which may be an expression or a type. Return -1 if we don't do anything special. */ HOST_WIDE_INT lang_get_alias_set (t) tree t ATTRIBUTE_UNUSED; { return -1; }