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[/] [openrisc/] [tags/] [gnu-src/] [gdb-6.8/] [pre-binutils-2.20.1-sync/] [gdb/] [language.c] - Rev 416
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/* Multiple source language support for GDB. Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc. Contributed by the Department of Computer Science at the State University of New York at Buffalo. This file is part of GDB. This program 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 of the License, or (at your option) any later version. This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ /* This file contains functions that return things that are specific to languages. Each function should examine current_language if necessary, and return the appropriate result. */ /* FIXME: Most of these would be better organized as macros which return data out of a "language-specific" struct pointer that is set whenever the working language changes. That would be a lot faster. */ #include "defs.h" #include <ctype.h> #include "gdb_string.h" #include "symtab.h" #include "gdbtypes.h" #include "value.h" #include "gdbcmd.h" #include "expression.h" #include "language.h" #include "target.h" #include "parser-defs.h" #include "jv-lang.h" #include "demangle.h" #include "symfile.h" extern void _initialize_language (void); static void set_case_str (void); static void set_range_str (void); static void set_type_str (void); static void set_lang_str (void); static void unk_lang_error (char *); static int unk_lang_parser (void); static void show_check (char *, int); static void set_check (char *, int); static void set_type_range_case (void); static void unk_lang_emit_char (int c, struct ui_file *stream, int quoter); static void unk_lang_printchar (int c, struct ui_file *stream); static void unk_lang_print_type (struct type *, char *, struct ui_file *, int, int); static int unk_lang_value_print (struct value *, struct ui_file *, int, enum val_prettyprint); static CORE_ADDR unk_lang_trampoline (struct frame_info *, CORE_ADDR pc); /* Forward declaration */ extern const struct language_defn unknown_language_defn; /* The current (default at startup) state of type and range checking. (If the modes are set to "auto", though, these are changed based on the default language at startup, and then again based on the language of the first source file. */ enum range_mode range_mode = range_mode_auto; enum range_check range_check = range_check_off; enum type_mode type_mode = type_mode_auto; enum type_check type_check = type_check_off; enum case_mode case_mode = case_mode_auto; enum case_sensitivity case_sensitivity = case_sensitive_on; /* The current language and language_mode (see language.h) */ const struct language_defn *current_language = &unknown_language_defn; enum language_mode language_mode = language_mode_auto; /* The language that the user expects to be typing in (the language of main(), or the last language we notified them about, or C). */ const struct language_defn *expected_language; /* The list of supported languages. The list itself is malloc'd. */ static const struct language_defn **languages; static unsigned languages_size; static unsigned languages_allocsize; #define DEFAULT_ALLOCSIZE 4 /* The "set language/type/range" commands all put stuff in these buffers. This is to make them work as set/show commands. The user's string is copied here, then the set_* commands look at them and update them to something that looks nice when it is printed out. */ static char *language; static char *type; static char *range; static char *case_sensitive; /* Warning issued when current_language and the language of the current frame do not match. */ char lang_frame_mismatch_warn[] = "Warning: the current language does not match this frame."; /* This page contains the functions corresponding to GDB commands and their helpers. */ /* Show command. Display a warning if the language set does not match the frame. */ static void show_language_command (struct ui_file *file, int from_tty, struct cmd_list_element *c, const char *value) { enum language flang; /* The language of the current frame */ deprecated_show_value_hack (file, from_tty, c, value); flang = get_frame_language (); if (flang != language_unknown && language_mode == language_mode_manual && current_language->la_language != flang) printf_filtered ("%s\n", lang_frame_mismatch_warn); } /* Set command. Change the current working language. */ static void set_language_command (char *ignore, int from_tty, struct cmd_list_element *c) { int i; enum language flang; char *err_lang; if (!language || !language[0]) { printf_unfiltered (_("\ The currently understood settings are:\n\n\ local or auto Automatic setting based on source file\n")); for (i = 0; i < languages_size; ++i) { /* Already dealt with these above. */ if (languages[i]->la_language == language_unknown || languages[i]->la_language == language_auto) continue; /* FIXME: i18n: for now assume that the human-readable name is just a capitalization of the internal name. */ printf_unfiltered ("%-16s Use the %c%s language\n", languages[i]->la_name, /* Capitalize first letter of language name. */ toupper (languages[i]->la_name[0]), languages[i]->la_name + 1); } /* Restore the silly string. */ set_language (current_language->la_language); return; } /* Search the list of languages for a match. */ for (i = 0; i < languages_size; i++) { if (strcmp (languages[i]->la_name, language) == 0) { /* Found it! Go into manual mode, and use this language. */ if (languages[i]->la_language == language_auto) { /* Enter auto mode. Set to the current frame's language, if known, or fallback to the initial language. */ language_mode = language_mode_auto; flang = get_frame_language (); if (flang != language_unknown) set_language (flang); else set_initial_language (); expected_language = current_language; return; } else { /* Enter manual mode. Set the specified language. */ language_mode = language_mode_manual; current_language = languages[i]; set_type_range_case (); set_lang_str (); expected_language = current_language; return; } } } /* Reset the language (esp. the global string "language") to the correct values. */ err_lang = savestring (language, strlen (language)); make_cleanup (xfree, err_lang); /* Free it after error */ set_language (current_language->la_language); error (_("Unknown language `%s'."), err_lang); } /* Show command. Display a warning if the type setting does not match the current language. */ static void show_type_command (struct ui_file *file, int from_tty, struct cmd_list_element *c, const char *value) { deprecated_show_value_hack (file, from_tty, c, value); if (type_check != current_language->la_type_check) printf_unfiltered ( "Warning: the current type check setting does not match the language.\n"); } /* Set command. Change the setting for type checking. */ static void set_type_command (char *ignore, int from_tty, struct cmd_list_element *c) { if (strcmp (type, "on") == 0) { type_check = type_check_on; type_mode = type_mode_manual; } else if (strcmp (type, "warn") == 0) { type_check = type_check_warn; type_mode = type_mode_manual; } else if (strcmp (type, "off") == 0) { type_check = type_check_off; type_mode = type_mode_manual; } else if (strcmp (type, "auto") == 0) { type_mode = type_mode_auto; set_type_range_case (); /* Avoid hitting the set_type_str call below. We did it in set_type_range_case. */ return; } else { warning (_("Unrecognized type check setting: \"%s\""), type); } set_type_str (); show_type_command (NULL, from_tty, NULL, NULL); } /* Show command. Display a warning if the range setting does not match the current language. */ static void show_range_command (struct ui_file *file, int from_tty, struct cmd_list_element *c, const char *value) { deprecated_show_value_hack (file, from_tty, c, value); if (range_check != current_language->la_range_check) printf_unfiltered ( "Warning: the current range check setting does not match the language.\n"); } /* Set command. Change the setting for range checking. */ static void set_range_command (char *ignore, int from_tty, struct cmd_list_element *c) { if (strcmp (range, "on") == 0) { range_check = range_check_on; range_mode = range_mode_manual; } else if (strcmp (range, "warn") == 0) { range_check = range_check_warn; range_mode = range_mode_manual; } else if (strcmp (range, "off") == 0) { range_check = range_check_off; range_mode = range_mode_manual; } else if (strcmp (range, "auto") == 0) { range_mode = range_mode_auto; set_type_range_case (); /* Avoid hitting the set_range_str call below. We did it in set_type_range_case. */ return; } else { warning (_("Unrecognized range check setting: \"%s\""), range); } set_range_str (); show_range_command (NULL, from_tty, NULL, NULL); } /* Show command. Display a warning if the case sensitivity setting does not match the current language. */ static void show_case_command (struct ui_file *file, int from_tty, struct cmd_list_element *c, const char *value) { deprecated_show_value_hack (file, from_tty, c, value); if (case_sensitivity != current_language->la_case_sensitivity) printf_unfiltered( "Warning: the current case sensitivity setting does not match the language.\n"); } /* Set command. Change the setting for case sensitivity. */ static void set_case_command (char *ignore, int from_tty, struct cmd_list_element *c) { if (strcmp (case_sensitive, "on") == 0) { case_sensitivity = case_sensitive_on; case_mode = case_mode_manual; } else if (strcmp (case_sensitive, "off") == 0) { case_sensitivity = case_sensitive_off; case_mode = case_mode_manual; } else if (strcmp (case_sensitive, "auto") == 0) { case_mode = case_mode_auto; set_type_range_case (); /* Avoid hitting the set_case_str call below. We did it in set_type_range_case. */ return; } else { warning (_("Unrecognized case-sensitive setting: \"%s\""), case_sensitive); } set_case_str(); show_case_command (NULL, from_tty, NULL, NULL); } /* Set the status of range and type checking and case sensitivity based on the current modes and the current language. If SHOW is non-zero, then print out the current language, type and range checking status. */ static void set_type_range_case (void) { if (range_mode == range_mode_auto) range_check = current_language->la_range_check; if (type_mode == type_mode_auto) type_check = current_language->la_type_check; if (case_mode == case_mode_auto) case_sensitivity = current_language->la_case_sensitivity; set_type_str (); set_range_str (); set_case_str (); } /* Set current language to (enum language) LANG. Returns previous language. */ enum language set_language (enum language lang) { int i; enum language prev_language; prev_language = current_language->la_language; for (i = 0; i < languages_size; i++) { if (languages[i]->la_language == lang) { current_language = languages[i]; set_type_range_case (); set_lang_str (); break; } } return prev_language; } /* This page contains functions that update the global vars language, type and range. */ static void set_lang_str (void) { char *prefix = ""; if (language) xfree (language); if (language_mode == language_mode_auto) prefix = "auto; currently "; language = concat (prefix, current_language->la_name, (char *)NULL); } static void set_type_str (void) { char *tmp = NULL, *prefix = ""; if (type) xfree (type); if (type_mode == type_mode_auto) prefix = "auto; currently "; switch (type_check) { case type_check_on: tmp = "on"; break; case type_check_off: tmp = "off"; break; case type_check_warn: tmp = "warn"; break; default: error (_("Unrecognized type check setting.")); } type = concat (prefix, tmp, (char *)NULL); } static void set_range_str (void) { char *tmp, *pref = ""; if (range_mode == range_mode_auto) pref = "auto; currently "; switch (range_check) { case range_check_on: tmp = "on"; break; case range_check_off: tmp = "off"; break; case range_check_warn: tmp = "warn"; break; default: error (_("Unrecognized range check setting.")); } if (range) xfree (range); range = concat (pref, tmp, (char *)NULL); } static void set_case_str (void) { char *tmp = NULL, *prefix = ""; if (case_mode==case_mode_auto) prefix = "auto; currently "; switch (case_sensitivity) { case case_sensitive_on: tmp = "on"; break; case case_sensitive_off: tmp = "off"; break; default: error (_("Unrecognized case-sensitive setting.")); } xfree (case_sensitive); case_sensitive = concat (prefix, tmp, (char *)NULL); } /* Print out the current language settings: language, range and type checking. If QUIETLY, print only what has changed. */ void language_info (int quietly) { if (quietly && expected_language == current_language) return; expected_language = current_language; printf_unfiltered (_("Current language: %s\n"), language); show_language_command (NULL, 1, NULL, NULL); if (!quietly) { printf_unfiltered (_("Type checking: %s\n"), type); show_type_command (NULL, 1, NULL, NULL); printf_unfiltered (_("Range checking: %s\n"), range); show_range_command (NULL, 1, NULL, NULL); printf_unfiltered (_("Case sensitivity: %s\n"), case_sensitive); show_case_command (NULL, 1, NULL, NULL); } } /* Return the result of a binary operation. */ #if 0 /* Currently unused */ struct type * binop_result_type (struct value *v1, struct value *v2) { int size, uns; struct type *t1 = check_typedef (VALUE_TYPE (v1)); struct type *t2 = check_typedef (VALUE_TYPE (v2)); int l1 = TYPE_LENGTH (t1); int l2 = TYPE_LENGTH (t2); switch (current_language->la_language) { case language_c: case language_cplus: case language_objc: if (TYPE_CODE (t1) == TYPE_CODE_FLT) return TYPE_CODE (t2) == TYPE_CODE_FLT && l2 > l1 ? VALUE_TYPE (v2) : VALUE_TYPE (v1); else if (TYPE_CODE (t2) == TYPE_CODE_FLT) return TYPE_CODE (t1) == TYPE_CODE_FLT && l1 > l2 ? VALUE_TYPE (v1) : VALUE_TYPE (v2); else if (TYPE_UNSIGNED (t1) && l1 > l2) return VALUE_TYPE (v1); else if (TYPE_UNSIGNED (t2) && l2 > l1) return VALUE_TYPE (v2); else /* Both are signed. Result is the longer type */ return l1 > l2 ? VALUE_TYPE (v1) : VALUE_TYPE (v2); break; case language_m2: /* If we are doing type-checking, l1 should equal l2, so this is not needed. */ return l1 > l2 ? VALUE_TYPE (v1) : VALUE_TYPE (v2); break; } internal_error (__FILE__, __LINE__, _("failed internal consistency check")); return (struct type *) 0; /* For lint */ } #endif /* 0 */ #if 0 /* This page contains functions that are used in type/range checking. They all return zero if the type/range check fails. It is hoped that these will make extending GDB to parse different languages a little easier. These are primarily used in eval.c when evaluating expressions and making sure that their types are correct. Instead of having a mess of conjucted/disjuncted expressions in an "if", the ideas of type can be wrapped up in the following functions. Note that some of them are not currently dependent upon which language is currently being parsed. For example, floats are the same in C and Modula-2 (ie. the only floating point type has TYPE_CODE of TYPE_CODE_FLT), while booleans are different. */ /* Returns non-zero if its argument is a simple type. This is the same for both Modula-2 and for C. In the C case, TYPE_CODE_CHAR will never occur, and thus will never cause the failure of the test. */ int simple_type (struct type *type) { CHECK_TYPEDEF (type); switch (TYPE_CODE (type)) { case TYPE_CODE_INT: case TYPE_CODE_CHAR: case TYPE_CODE_ENUM: case TYPE_CODE_FLT: case TYPE_CODE_RANGE: case TYPE_CODE_BOOL: return 1; default: return 0; } } /* Returns non-zero if its argument is of an ordered type. An ordered type is one in which the elements can be tested for the properties of "greater than", "less than", etc, or for which the operations "increment" or "decrement" make sense. */ int ordered_type (struct type *type) { CHECK_TYPEDEF (type); switch (TYPE_CODE (type)) { case TYPE_CODE_INT: case TYPE_CODE_CHAR: case TYPE_CODE_ENUM: case TYPE_CODE_FLT: case TYPE_CODE_RANGE: return 1; default: return 0; } } /* Returns non-zero if the two types are the same */ int same_type (struct type *arg1, struct type *arg2) { CHECK_TYPEDEF (type); if (structured_type (arg1) ? !structured_type (arg2) : structured_type (arg2)) /* One is structured and one isn't */ return 0; else if (structured_type (arg1) && structured_type (arg2)) return arg1 == arg2; else if (numeric_type (arg1) && numeric_type (arg2)) return (TYPE_CODE (arg2) == TYPE_CODE (arg1)) && (TYPE_UNSIGNED (arg1) == TYPE_UNSIGNED (arg2)) ? 1 : 0; else return arg1 == arg2; } /* Returns non-zero if the type is integral */ int integral_type (struct type *type) { CHECK_TYPEDEF (type); switch (current_language->la_language) { case language_c: case language_cplus: case language_objc: return (TYPE_CODE (type) != TYPE_CODE_INT) && (TYPE_CODE (type) != TYPE_CODE_ENUM) ? 0 : 1; case language_m2: case language_pascal: return TYPE_CODE (type) != TYPE_CODE_INT ? 0 : 1; default: error (_("Language not supported.")); } } /* Returns non-zero if the value is numeric */ int numeric_type (struct type *type) { CHECK_TYPEDEF (type); switch (TYPE_CODE (type)) { case TYPE_CODE_INT: case TYPE_CODE_FLT: return 1; default: return 0; } } /* Returns non-zero if the value is a character type */ int character_type (struct type *type) { CHECK_TYPEDEF (type); switch (current_language->la_language) { case language_m2: case language_pascal: return TYPE_CODE (type) != TYPE_CODE_CHAR ? 0 : 1; case language_c: case language_cplus: case language_objc: return (TYPE_CODE (type) == TYPE_CODE_INT) && TYPE_LENGTH (type) == sizeof (char) ? 1 : 0; default: return (0); } } /* Returns non-zero if the value is a string type */ int string_type (struct type *type) { CHECK_TYPEDEF (type); switch (current_language->la_language) { case language_m2: case language_pascal: return TYPE_CODE (type) != TYPE_CODE_STRING ? 0 : 1; case language_c: case language_cplus: case language_objc: /* C does not have distinct string type. */ return (0); default: return (0); } } /* Returns non-zero if the value is a boolean type */ int boolean_type (struct type *type) { CHECK_TYPEDEF (type); if (TYPE_CODE (type) == TYPE_CODE_BOOL) return 1; switch (current_language->la_language) { case language_c: case language_cplus: case language_objc: /* Might be more cleanly handled by having a TYPE_CODE_INT_NOT_BOOL for (the deleted) CHILL and such languages, or a TYPE_CODE_INT_OR_BOOL for C. */ if (TYPE_CODE (type) == TYPE_CODE_INT) return 1; default: break; } return 0; } /* Returns non-zero if the value is a floating-point type */ int float_type (struct type *type) { CHECK_TYPEDEF (type); return TYPE_CODE (type) == TYPE_CODE_FLT; } /* Returns non-zero if the value is a pointer type */ int pointer_type (struct type *type) { return TYPE_CODE (type) == TYPE_CODE_PTR || TYPE_CODE (type) == TYPE_CODE_REF; } /* Returns non-zero if the value is a structured type */ int structured_type (struct type *type) { CHECK_TYPEDEF (type); switch (current_language->la_language) { case language_c: case language_cplus: case language_objc: return (TYPE_CODE (type) == TYPE_CODE_STRUCT) || (TYPE_CODE (type) == TYPE_CODE_UNION) || (TYPE_CODE (type) == TYPE_CODE_ARRAY); case language_pascal: return (TYPE_CODE(type) == TYPE_CODE_STRUCT) || (TYPE_CODE(type) == TYPE_CODE_UNION) || (TYPE_CODE(type) == TYPE_CODE_SET) || (TYPE_CODE(type) == TYPE_CODE_ARRAY); case language_m2: return (TYPE_CODE (type) == TYPE_CODE_STRUCT) || (TYPE_CODE (type) == TYPE_CODE_SET) || (TYPE_CODE (type) == TYPE_CODE_ARRAY); default: return (0); } } #endif struct type * lang_bool_type (void) { struct symbol *sym; struct type *type; switch (current_language->la_language) { case language_fortran: sym = lookup_symbol ("logical", NULL, VAR_DOMAIN, NULL, NULL); if (sym) { type = SYMBOL_TYPE (sym); if (type && TYPE_CODE (type) == TYPE_CODE_BOOL) return type; } return builtin_type_f_logical_s2; case language_cplus: case language_pascal: case language_ada: if (current_language->la_language==language_cplus) {sym = lookup_symbol ("bool", NULL, VAR_DOMAIN, NULL, NULL);} else {sym = lookup_symbol ("boolean", NULL, VAR_DOMAIN, NULL, NULL);} if (sym) { type = SYMBOL_TYPE (sym); if (type && TYPE_CODE (type) == TYPE_CODE_BOOL) return type; } return builtin_type_bool; case language_java: sym = lookup_symbol ("boolean", NULL, VAR_DOMAIN, NULL, NULL); if (sym) { type = SYMBOL_TYPE (sym); if (type && TYPE_CODE (type) == TYPE_CODE_BOOL) return type; } return java_boolean_type; default: return builtin_type_int; } } /* This page contains functions that return info about (struct value) values used in GDB. */ /* Returns non-zero if the value VAL represents a true value. */ int value_true (struct value *val) { /* It is possible that we should have some sort of error if a non-boolean value is used in this context. Possibly dependent on some kind of "boolean-checking" option like range checking. But it should probably not depend on the language except insofar as is necessary to identify a "boolean" value (i.e. in C using a float, pointer, etc., as a boolean should be an error, probably). */ return !value_logical_not (val); } /* This page contains functions for the printing out of error messages that occur during type- and range- checking. */ /* These are called when a language fails a type- or range-check. The first argument should be a printf()-style format string, and the rest of the arguments should be its arguments. If [type|range]_check is [type|range]_check_on, an error is printed; if [type|range]_check_warn, a warning; otherwise just the message. */ void type_error (const char *string,...) { va_list args; va_start (args, string); switch (type_check) { case type_check_warn: vwarning (string, args); break; case type_check_on: verror (string, args); break; case type_check_off: /* FIXME: cagney/2002-01-30: Should this function print anything when type error is off? */ vfprintf_filtered (gdb_stderr, string, args); fprintf_filtered (gdb_stderr, "\n"); break; default: internal_error (__FILE__, __LINE__, _("bad switch")); } va_end (args); } void range_error (const char *string,...) { va_list args; va_start (args, string); switch (range_check) { case range_check_warn: vwarning (string, args); break; case range_check_on: verror (string, args); break; case range_check_off: /* FIXME: cagney/2002-01-30: Should this function print anything when range error is off? */ vfprintf_filtered (gdb_stderr, string, args); fprintf_filtered (gdb_stderr, "\n"); break; default: internal_error (__FILE__, __LINE__, _("bad switch")); } va_end (args); } /* This page contains miscellaneous functions */ /* Return the language enum for a given language string. */ enum language language_enum (char *str) { int i; for (i = 0; i < languages_size; i++) if (strcmp (languages[i]->la_name, str) == 0) return languages[i]->la_language; return language_unknown; } /* Return the language struct for a given language enum. */ const struct language_defn * language_def (enum language lang) { int i; for (i = 0; i < languages_size; i++) { if (languages[i]->la_language == lang) { return languages[i]; } } return NULL; } /* Return the language as a string */ char * language_str (enum language lang) { int i; for (i = 0; i < languages_size; i++) { if (languages[i]->la_language == lang) { return languages[i]->la_name; } } return "Unknown"; } static void set_check (char *ignore, int from_tty) { printf_unfiltered ( "\"set check\" must be followed by the name of a check subcommand.\n"); help_list (setchecklist, "set check ", -1, gdb_stdout); } static void show_check (char *ignore, int from_tty) { cmd_show_list (showchecklist, from_tty, ""); } /* Add a language to the set of known languages. */ void add_language (const struct language_defn *lang) { if (lang->la_magic != LANG_MAGIC) { fprintf_unfiltered (gdb_stderr, "Magic number of %s language struct wrong\n", lang->la_name); internal_error (__FILE__, __LINE__, _("failed internal consistency check")); } if (!languages) { languages_allocsize = DEFAULT_ALLOCSIZE; languages = (const struct language_defn **) xmalloc (languages_allocsize * sizeof (*languages)); } if (languages_size >= languages_allocsize) { languages_allocsize *= 2; languages = (const struct language_defn **) xrealloc ((char *) languages, languages_allocsize * sizeof (*languages)); } languages[languages_size++] = lang; } /* Iterate through all registered languages looking for and calling any non-NULL struct language_defn.skip_trampoline() functions. Return the result from the first that returns non-zero, or 0 if all `fail'. */ CORE_ADDR skip_language_trampoline (struct frame_info *frame, CORE_ADDR pc) { int i; for (i = 0; i < languages_size; i++) { if (languages[i]->skip_trampoline) { CORE_ADDR real_pc = (languages[i]->skip_trampoline) (frame, pc); if (real_pc) return real_pc; } } return 0; } /* Return demangled language symbol, or NULL. FIXME: Options are only useful for certain languages and ignored by others, so it would be better to remove them here and have a more flexible demangler for the languages that need it. FIXME: Sometimes the demangler is invoked when we don't know the language, so we can't use this everywhere. */ char * language_demangle (const struct language_defn *current_language, const char *mangled, int options) { if (current_language != NULL && current_language->la_demangle) return current_language->la_demangle (mangled, options); return NULL; } /* Return class name from physname or NULL. */ char * language_class_name_from_physname (const struct language_defn *current_language, const char *physname) { if (current_language != NULL && current_language->la_class_name_from_physname) return current_language->la_class_name_from_physname (physname); return NULL; } /* Return non-zero if TYPE should be passed (and returned) by reference at the language level. */ int language_pass_by_reference (struct type *type) { return current_language->la_pass_by_reference (type); } /* Return zero; by default, types are passed by value at the language level. The target ABI may pass or return some structs by reference independent of this. */ int default_pass_by_reference (struct type *type) { return 0; } /* Return the default string containing the list of characters delimiting words. This is a reasonable default value that most languages should be able to use. */ char * default_word_break_characters (void) { return " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-"; } /* Print the index of array elements using the C99 syntax. */ void default_print_array_index (struct value *index_value, struct ui_file *stream, int format, enum val_prettyprint pretty) { fprintf_filtered (stream, "["); LA_VALUE_PRINT (index_value, stream, format, pretty); fprintf_filtered (stream, "] = "); } /* Define the language that is no language. */ static int unk_lang_parser (void) { return 1; } static void unk_lang_error (char *msg) { error (_("Attempted to parse an expression with unknown language")); } static void unk_lang_emit_char (int c, struct ui_file *stream, int quoter) { error (_("internal error - unimplemented function unk_lang_emit_char called.")); } static void unk_lang_printchar (int c, struct ui_file *stream) { error (_("internal error - unimplemented function unk_lang_printchar called.")); } static void unk_lang_printstr (struct ui_file *stream, const gdb_byte *string, unsigned int length, int width, int force_ellipses) { error (_("internal error - unimplemented function unk_lang_printstr called.")); } static void unk_lang_print_type (struct type *type, char *varstring, struct ui_file *stream, int show, int level) { error (_("internal error - unimplemented function unk_lang_print_type called.")); } static int unk_lang_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset, CORE_ADDR address, struct ui_file *stream, int format, int deref_ref, int recurse, enum val_prettyprint pretty) { error (_("internal error - unimplemented function unk_lang_val_print called.")); } static int unk_lang_value_print (struct value *val, struct ui_file *stream, int format, enum val_prettyprint pretty) { error (_("internal error - unimplemented function unk_lang_value_print called.")); } static CORE_ADDR unk_lang_trampoline (struct frame_info *frame, CORE_ADDR pc) { return 0; } /* Unknown languages just use the cplus demangler. */ static char *unk_lang_demangle (const char *mangled, int options) { return cplus_demangle (mangled, options); } static char *unk_lang_class_name (const char *mangled) { return NULL; } static const struct op_print unk_op_print_tab[] = { {NULL, OP_NULL, PREC_NULL, 0} }; static void unknown_language_arch_info (struct gdbarch *gdbarch, struct language_arch_info *lai) { lai->string_char_type = builtin_type (gdbarch)->builtin_char; lai->primitive_type_vector = GDBARCH_OBSTACK_CALLOC (gdbarch, 1, struct type *); } const struct language_defn unknown_language_defn = { "unknown", language_unknown, range_check_off, type_check_off, array_row_major, case_sensitive_on, &exp_descriptor_standard, unk_lang_parser, unk_lang_error, null_post_parser, unk_lang_printchar, /* Print character constant */ unk_lang_printstr, unk_lang_emit_char, unk_lang_print_type, /* Print a type using appropriate syntax */ unk_lang_val_print, /* Print a value using appropriate syntax */ unk_lang_value_print, /* Print a top-level value */ unk_lang_trampoline, /* Language specific skip_trampoline */ value_of_this, /* value_of_this */ basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ basic_lookup_transparent_type,/* lookup_transparent_type */ unk_lang_demangle, /* Language specific symbol demangler */ unk_lang_class_name, /* Language specific class_name_from_physname */ unk_op_print_tab, /* expression operators for printing */ 1, /* c-style arrays */ 0, /* String lower bound */ default_word_break_characters, default_make_symbol_completion_list, unknown_language_arch_info, /* la_language_arch_info. */ default_print_array_index, default_pass_by_reference, LANG_MAGIC }; /* These two structs define fake entries for the "local" and "auto" options. */ const struct language_defn auto_language_defn = { "auto", language_auto, range_check_off, type_check_off, array_row_major, case_sensitive_on, &exp_descriptor_standard, unk_lang_parser, unk_lang_error, null_post_parser, unk_lang_printchar, /* Print character constant */ unk_lang_printstr, unk_lang_emit_char, unk_lang_print_type, /* Print a type using appropriate syntax */ unk_lang_val_print, /* Print a value using appropriate syntax */ unk_lang_value_print, /* Print a top-level value */ unk_lang_trampoline, /* Language specific skip_trampoline */ value_of_this, /* value_of_this */ basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ basic_lookup_transparent_type,/* lookup_transparent_type */ unk_lang_demangle, /* Language specific symbol demangler */ unk_lang_class_name, /* Language specific class_name_from_physname */ unk_op_print_tab, /* expression operators for printing */ 1, /* c-style arrays */ 0, /* String lower bound */ default_word_break_characters, default_make_symbol_completion_list, unknown_language_arch_info, /* la_language_arch_info. */ default_print_array_index, default_pass_by_reference, LANG_MAGIC }; const struct language_defn local_language_defn = { "local", language_auto, range_check_off, type_check_off, case_sensitive_on, array_row_major, &exp_descriptor_standard, unk_lang_parser, unk_lang_error, null_post_parser, unk_lang_printchar, /* Print character constant */ unk_lang_printstr, unk_lang_emit_char, unk_lang_print_type, /* Print a type using appropriate syntax */ unk_lang_val_print, /* Print a value using appropriate syntax */ unk_lang_value_print, /* Print a top-level value */ unk_lang_trampoline, /* Language specific skip_trampoline */ value_of_this, /* value_of_this */ basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ basic_lookup_transparent_type,/* lookup_transparent_type */ unk_lang_demangle, /* Language specific symbol demangler */ unk_lang_class_name, /* Language specific class_name_from_physname */ unk_op_print_tab, /* expression operators for printing */ 1, /* c-style arrays */ 0, /* String lower bound */ default_word_break_characters, default_make_symbol_completion_list, unknown_language_arch_info, /* la_language_arch_info. */ default_print_array_index, default_pass_by_reference, LANG_MAGIC }; /* Per-architecture language information. */ static struct gdbarch_data *language_gdbarch_data; struct language_gdbarch { /* A vector of per-language per-architecture info. Indexed by "enum language". */ struct language_arch_info arch_info[nr_languages]; }; static void * language_gdbarch_post_init (struct gdbarch *gdbarch) { struct language_gdbarch *l; int i; l = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct language_gdbarch); for (i = 0; i < languages_size; i++) { if (languages[i] != NULL && languages[i]->la_language_arch_info != NULL) languages[i]->la_language_arch_info (gdbarch, l->arch_info + languages[i]->la_language); } return l; } struct type * language_string_char_type (const struct language_defn *la, struct gdbarch *gdbarch) { struct language_gdbarch *ld = gdbarch_data (gdbarch, language_gdbarch_data); return ld->arch_info[la->la_language].string_char_type; } struct type * language_lookup_primitive_type_by_name (const struct language_defn *la, struct gdbarch *gdbarch, const char *name) { struct language_gdbarch *ld = gdbarch_data (gdbarch, language_gdbarch_data); struct type *const *p; for (p = ld->arch_info[la->la_language].primitive_type_vector; (*p) != NULL; p++) { if (strcmp (TYPE_NAME (*p), name) == 0) return (*p); } return (NULL); } /* Initialize the language routines */ void _initialize_language (void) { struct cmd_list_element *set, *show; language_gdbarch_data = gdbarch_data_register_post_init (language_gdbarch_post_init); /* GDB commands for language specific stuff */ /* FIXME: cagney/2005-02-20: This should be implemented using an enum. */ add_setshow_string_noescape_cmd ("language", class_support, &language, _("\ Set the current source language."), _("\ Show the current source language."), NULL, set_language_command, show_language_command, &setlist, &showlist); add_prefix_cmd ("check", no_class, set_check, _("Set the status of the type/range checker."), &setchecklist, "set check ", 0, &setlist); add_alias_cmd ("c", "check", no_class, 1, &setlist); add_alias_cmd ("ch", "check", no_class, 1, &setlist); add_prefix_cmd ("check", no_class, show_check, _("Show the status of the type/range checker."), &showchecklist, "show check ", 0, &showlist); add_alias_cmd ("c", "check", no_class, 1, &showlist); add_alias_cmd ("ch", "check", no_class, 1, &showlist); /* FIXME: cagney/2005-02-20: This should be implemented using an enum. */ add_setshow_string_noescape_cmd ("type", class_support, &type, _("\ Set type checking. (on/warn/off/auto)"), _("\ Show type checking. (on/warn/off/auto)"), NULL, set_type_command, show_type_command, &setchecklist, &showchecklist); /* FIXME: cagney/2005-02-20: This should be implemented using an enum. */ add_setshow_string_noescape_cmd ("range", class_support, &range, _("\ Set range checking. (on/warn/off/auto)"), _("\ Show range checking. (on/warn/off/auto)"), NULL, set_range_command, show_range_command, &setchecklist, &showchecklist); /* FIXME: cagney/2005-02-20: This should be implemented using an enum. */ add_setshow_string_noescape_cmd ("case-sensitive", class_support, &case_sensitive, _("\ Set case sensitivity in name search. (on/off/auto)"), _("\ Show case sensitivity in name search. (on/off/auto)"), _("\ For Fortran the default is off; for other languages the default is on."), set_case_command, show_case_command, &setlist, &showlist); add_language (&unknown_language_defn); add_language (&local_language_defn); add_language (&auto_language_defn); language = savestring ("auto", strlen ("auto")); type = savestring ("auto", strlen ("auto")); range = savestring ("auto", strlen ("auto")); case_sensitive = savestring ("auto",strlen ("auto")); /* Have the above take effect */ set_language (language_auto); }
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