/* Fortran language support routines for GDB, the GNU debugger. Copyright (C) 1993-1996, 1998-2005, 2007-2012 Free Software Foundation, Inc. Contributed by Motorola. Adapted from the C parser by Farooq Butt (fmbutt@engage.sps.mot.com). 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 . */ #include "defs.h" #include "gdb_string.h" #include "symtab.h" #include "gdbtypes.h" #include "expression.h" #include "parser-defs.h" #include "language.h" #include "f-lang.h" #include "valprint.h" #include "value.h" #include "cp-support.h" #include "charset.h" #include "c-lang.h" /* Following is dubious stuff that had been in the xcoff reader. */ struct saved_fcn { long line_offset; /* Line offset for function. */ struct saved_fcn *next; }; struct saved_bf_symnum { long symnum_fcn; /* Symnum of function (i.e. .function directive). */ long symnum_bf; /* Symnum of .bf for this function. */ struct saved_bf_symnum *next; }; typedef struct saved_fcn SAVED_FUNCTION, *SAVED_FUNCTION_PTR; typedef struct saved_bf_symnum SAVED_BF, *SAVED_BF_PTR; /* Local functions */ extern void _initialize_f_language (void); #if 0 static void clear_function_list (void); static long get_bf_for_fcn (long); static void clear_bf_list (void); static void patch_all_commons_by_name (char *, CORE_ADDR, int); static SAVED_F77_COMMON_PTR find_first_common_named (char *); static void add_common_entry (struct symbol *); static void add_common_block (char *, CORE_ADDR, int, char *); static SAVED_FUNCTION *allocate_saved_function_node (void); static SAVED_BF_PTR allocate_saved_bf_node (void); static COMMON_ENTRY_PTR allocate_common_entry_node (void); static SAVED_F77_COMMON_PTR allocate_saved_f77_common_node (void); static void patch_common_entries (SAVED_F77_COMMON_PTR, CORE_ADDR, int); #endif static void f_printchar (int c, struct type *type, struct ui_file * stream); static void f_emit_char (int c, struct type *type, struct ui_file * stream, int quoter); /* Return the encoding that should be used for the character type TYPE. */ static const char * f_get_encoding (struct type *type) { const char *encoding; switch (TYPE_LENGTH (type)) { case 1: encoding = target_charset (get_type_arch (type)); break; case 4: if (gdbarch_byte_order (get_type_arch (type)) == BFD_ENDIAN_BIG) encoding = "UTF-32BE"; else encoding = "UTF-32LE"; break; default: error (_("unrecognized character type")); } return encoding; } /* Print the character C on STREAM as part of the contents of a literal string whose delimiter is QUOTER. Note that that format for printing characters and strings is language specific. FIXME: This is a copy of the same function from c-exp.y. It should be replaced with a true F77 version. */ static void f_emit_char (int c, struct type *type, struct ui_file *stream, int quoter) { const char *encoding = f_get_encoding (type); generic_emit_char (c, type, stream, quoter, encoding); } /* Implementation of la_printchar. */ static void f_printchar (int c, struct type *type, struct ui_file *stream) { fputs_filtered ("'", stream); LA_EMIT_CHAR (c, type, stream, '\''); fputs_filtered ("'", stream); } /* Print the character string STRING, printing at most LENGTH characters. Printing stops early if the number hits print_max; repeat counts are printed as appropriate. Print ellipses at the end if we had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. FIXME: This is a copy of the same function from c-exp.y. It should be replaced with a true F77 version. */ static void f_printstr (struct ui_file *stream, struct type *type, const gdb_byte *string, unsigned int length, const char *encoding, int force_ellipses, const struct value_print_options *options) { const char *type_encoding = f_get_encoding (type); if (TYPE_LENGTH (type) == 4) fputs_filtered ("4_", stream); if (!encoding || !*encoding) encoding = type_encoding; generic_printstr (stream, type, string, length, encoding, force_ellipses, '\'', 0, options); } /* Table of operators and their precedences for printing expressions. */ static const struct op_print f_op_print_tab[] = { {"+", BINOP_ADD, PREC_ADD, 0}, {"+", UNOP_PLUS, PREC_PREFIX, 0}, {"-", BINOP_SUB, PREC_ADD, 0}, {"-", UNOP_NEG, PREC_PREFIX, 0}, {"*", BINOP_MUL, PREC_MUL, 0}, {"/", BINOP_DIV, PREC_MUL, 0}, {"DIV", BINOP_INTDIV, PREC_MUL, 0}, {"MOD", BINOP_REM, PREC_MUL, 0}, {"=", BINOP_ASSIGN, PREC_ASSIGN, 1}, {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0}, {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0}, {".LE.", BINOP_LEQ, PREC_ORDER, 0}, {".GE.", BINOP_GEQ, PREC_ORDER, 0}, {".GT.", BINOP_GTR, PREC_ORDER, 0}, {".LT.", BINOP_LESS, PREC_ORDER, 0}, {"**", UNOP_IND, PREC_PREFIX, 0}, {"@", BINOP_REPEAT, PREC_REPEAT, 0}, {NULL, 0, 0, 0} }; enum f_primitive_types { f_primitive_type_character, f_primitive_type_logical, f_primitive_type_logical_s1, f_primitive_type_logical_s2, f_primitive_type_logical_s8, f_primitive_type_integer, f_primitive_type_integer_s2, f_primitive_type_real, f_primitive_type_real_s8, f_primitive_type_real_s16, f_primitive_type_complex_s8, f_primitive_type_complex_s16, f_primitive_type_void, nr_f_primitive_types }; static void f_language_arch_info (struct gdbarch *gdbarch, struct language_arch_info *lai) { const struct builtin_f_type *builtin = builtin_f_type (gdbarch); lai->string_char_type = builtin->builtin_character; lai->primitive_type_vector = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_f_primitive_types + 1, struct type *); lai->primitive_type_vector [f_primitive_type_character] = builtin->builtin_character; lai->primitive_type_vector [f_primitive_type_logical] = builtin->builtin_logical; lai->primitive_type_vector [f_primitive_type_logical_s1] = builtin->builtin_logical_s1; lai->primitive_type_vector [f_primitive_type_logical_s2] = builtin->builtin_logical_s2; lai->primitive_type_vector [f_primitive_type_logical_s8] = builtin->builtin_logical_s8; lai->primitive_type_vector [f_primitive_type_real] = builtin->builtin_real; lai->primitive_type_vector [f_primitive_type_real_s8] = builtin->builtin_real_s8; lai->primitive_type_vector [f_primitive_type_real_s16] = builtin->builtin_real_s16; lai->primitive_type_vector [f_primitive_type_complex_s8] = builtin->builtin_complex_s8; lai->primitive_type_vector [f_primitive_type_complex_s16] = builtin->builtin_complex_s16; lai->primitive_type_vector [f_primitive_type_void] = builtin->builtin_void; lai->bool_type_symbol = "logical"; lai->bool_type_default = builtin->builtin_logical_s2; } /* Remove the modules separator :: from the default break list. */ static char * f_word_break_characters (void) { static char *retval; if (!retval) { char *s; retval = xstrdup (default_word_break_characters ()); s = strchr (retval, ':'); if (s) { char *last_char = &s[strlen (s) - 1]; *s = *last_char; *last_char = 0; } } return retval; } /* Consider the modules separator :: as a valid symbol name character class. */ static VEC (char_ptr) * f_make_symbol_completion_list (char *text, char *word) { return default_make_symbol_completion_list_break_on (text, word, ":"); } const struct language_defn f_language_defn = { "fortran", language_fortran, range_check_on, type_check_on, case_sensitive_off, array_column_major, macro_expansion_no, &exp_descriptor_standard, f_parse, /* parser */ f_error, /* parser error function */ null_post_parser, f_printchar, /* Print character constant */ f_printstr, /* function to print string constant */ f_emit_char, /* Function to print a single character */ f_print_type, /* Print a type using appropriate syntax */ default_print_typedef, /* Print a typedef using appropriate syntax */ f_val_print, /* Print a value using appropriate syntax */ c_value_print, /* FIXME */ default_read_var_value, /* la_read_var_value */ NULL, /* Language specific skip_trampoline */ NULL, /* name_of_this */ cp_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */ basic_lookup_transparent_type,/* lookup_transparent_type */ NULL, /* Language specific symbol demangler */ NULL, /* Language specific class_name_from_physname */ f_op_print_tab, /* expression operators for printing */ 0, /* arrays are first-class (not c-style) */ 1, /* String lower bound */ f_word_break_characters, f_make_symbol_completion_list, f_language_arch_info, default_print_array_index, default_pass_by_reference, default_get_string, NULL, /* la_get_symbol_name_cmp */ iterate_over_symbols, LANG_MAGIC }; static void * build_fortran_types (struct gdbarch *gdbarch) { struct builtin_f_type *builtin_f_type = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type); builtin_f_type->builtin_void = arch_type (gdbarch, TYPE_CODE_VOID, 1, "VOID"); builtin_f_type->builtin_character = arch_integer_type (gdbarch, TARGET_CHAR_BIT, 0, "character"); builtin_f_type->builtin_logical_s1 = arch_boolean_type (gdbarch, TARGET_CHAR_BIT, 1, "logical*1"); builtin_f_type->builtin_integer_s2 = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch), 0, "integer*2"); builtin_f_type->builtin_logical_s2 = arch_boolean_type (gdbarch, gdbarch_short_bit (gdbarch), 1, "logical*2"); builtin_f_type->builtin_logical_s8 = arch_boolean_type (gdbarch, gdbarch_long_long_bit (gdbarch), 1, "logical*8"); builtin_f_type->builtin_integer = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 0, "integer"); builtin_f_type->builtin_logical = arch_boolean_type (gdbarch, gdbarch_int_bit (gdbarch), 1, "logical*4"); builtin_f_type->builtin_real = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch), "real", NULL); builtin_f_type->builtin_real_s8 = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch), "real*8", NULL); builtin_f_type->builtin_real_s16 = arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch), "real*16", NULL); builtin_f_type->builtin_complex_s8 = arch_complex_type (gdbarch, "complex*8", builtin_f_type->builtin_real); builtin_f_type->builtin_complex_s16 = arch_complex_type (gdbarch, "complex*16", builtin_f_type->builtin_real_s8); builtin_f_type->builtin_complex_s32 = arch_complex_type (gdbarch, "complex*32", builtin_f_type->builtin_real_s16); return builtin_f_type; } static struct gdbarch_data *f_type_data; const struct builtin_f_type * builtin_f_type (struct gdbarch *gdbarch) { return gdbarch_data (gdbarch, f_type_data); } void _initialize_f_language (void) { f_type_data = gdbarch_data_register_post_init (build_fortran_types); add_language (&f_language_defn); } #if 0 static SAVED_BF_PTR allocate_saved_bf_node (void) { SAVED_BF_PTR new; new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF)); return (new); } static SAVED_FUNCTION * allocate_saved_function_node (void) { SAVED_FUNCTION *new; new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION)); return (new); } static SAVED_F77_COMMON_PTR allocate_saved_f77_common_node (void) { SAVED_F77_COMMON_PTR new; new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON)); return (new); } static COMMON_ENTRY_PTR allocate_common_entry_node (void) { COMMON_ENTRY_PTR new; new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY)); return (new); } #endif SAVED_F77_COMMON_PTR head_common_list = NULL; /* Ptr to 1st saved COMMON */ SAVED_F77_COMMON_PTR tail_common_list = NULL; /* Ptr to last saved COMMON */ SAVED_F77_COMMON_PTR current_common = NULL; /* Ptr to current COMMON */ #if 0 static SAVED_BF_PTR saved_bf_list = NULL; /* Ptr to (.bf,function) list */ static SAVED_BF_PTR saved_bf_list_end = NULL; /* Ptr to above list's end */ static SAVED_BF_PTR current_head_bf_list = NULL; /* Current head of above list. */ static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use in macros. */ /* The following function simply enters a given common block onto the global common block chain. */ static void add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab) { SAVED_F77_COMMON_PTR tmp; char *c, *local_copy_func_stab; /* If the COMMON block we are trying to add has a blank name (i.e. "#BLNK_COM") then we set it to __BLANK because the darn "#" character makes GDB's input parser have fits. */ if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0 || strcmp (name, BLANK_COMMON_NAME_MF77) == 0) { xfree (name); name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1); strcpy (name, BLANK_COMMON_NAME_LOCAL); } tmp = allocate_saved_f77_common_node (); local_copy_func_stab = xmalloc (strlen (func_stab) + 1); strcpy (local_copy_func_stab, func_stab); tmp->name = xmalloc (strlen (name) + 1); /* local_copy_func_stab is a stabstring, let us first extract the function name from the stab by NULLing out the ':' character. */ c = NULL; c = strchr (local_copy_func_stab, ':'); if (c) *c = '\0'; else error (_("Malformed function STAB found in add_common_block()")); tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1); strcpy (tmp->owning_function, local_copy_func_stab); strcpy (tmp->name, name); tmp->offset = offset; tmp->next = NULL; tmp->entries = NULL; tmp->secnum = secnum; current_common = tmp; if (head_common_list == NULL) { head_common_list = tail_common_list = tmp; } else { tail_common_list->next = tmp; tail_common_list = tmp; } } #endif /* The following function simply enters a given common entry onto the "current_common" block that has been saved away. */ #if 0 static void add_common_entry (struct symbol *entry_sym_ptr) { COMMON_ENTRY_PTR tmp; /* The order of this list is important, since we expect the entries to appear in decl. order when we later issue "info common" calls. */ tmp = allocate_common_entry_node (); tmp->next = NULL; tmp->symbol = entry_sym_ptr; if (current_common == NULL) error (_("Attempt to add COMMON entry with no block open!")); else { if (current_common->entries == NULL) { current_common->entries = tmp; current_common->end_of_entries = tmp; } else { current_common->end_of_entries->next = tmp; current_common->end_of_entries = tmp; } } } #endif /* This routine finds the first encountred COMMON block named "name". */ #if 0 static SAVED_F77_COMMON_PTR find_first_common_named (char *name) { SAVED_F77_COMMON_PTR tmp; tmp = head_common_list; while (tmp != NULL) { if (strcmp (tmp->name, name) == 0) return (tmp); else tmp = tmp->next; } return (NULL); } #endif /* This routine finds the first encountred COMMON block named "name" that belongs to function funcname. */ SAVED_F77_COMMON_PTR find_common_for_function (const char *name, const char *funcname) { SAVED_F77_COMMON_PTR tmp; tmp = head_common_list; while (tmp != NULL) { if (strcmp (tmp->name, name) == 0 && strcmp (tmp->owning_function, funcname) == 0) return (tmp); else tmp = tmp->next; } return (NULL); } #if 0 /* The following function is called to patch up the offsets for the statics contained in the COMMON block named "name." */ static void patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum) { COMMON_ENTRY_PTR entry; blk->offset = offset; /* Keep this around for future use. */ entry = blk->entries; while (entry != NULL) { SYMBOL_VALUE (entry->symbol) += offset; SYMBOL_SECTION (entry->symbol) = secnum; entry = entry->next; } blk->secnum = secnum; } /* Patch all commons named "name" that need patching.Since COMMON blocks occur with relative infrequency, we simply do a linear scan on the name. Eventually, the best way to do this will be a hashed-lookup. Secnum is the section number for the .bss section (which is where common data lives). */ static void patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum) { SAVED_F77_COMMON_PTR tmp; /* For blank common blocks, change the canonical reprsentation of a blank name */ if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0 || strcmp (name, BLANK_COMMON_NAME_MF77) == 0) { xfree (name); name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1); strcpy (name, BLANK_COMMON_NAME_LOCAL); } tmp = head_common_list; while (tmp != NULL) { if (COMMON_NEEDS_PATCHING (tmp)) if (strcmp (tmp->name, name) == 0) patch_common_entries (tmp, offset, secnum); tmp = tmp->next; } } #endif /* This macro adds the symbol-number for the start of the function (the symbol number of the .bf) referenced by symnum_fcn to a list. This list, in reality should be a FIFO queue but since #line pragmas sometimes cause line ranges to get messed up we simply create a linear list. This list can then be searched first by a queueing algorithm and upon failure fall back to a linear scan. */ #if 0 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \ \ if (saved_bf_list == NULL) \ { \ tmp_bf_ptr = allocate_saved_bf_node(); \ \ tmp_bf_ptr->symnum_bf = (bf_sym); \ tmp_bf_ptr->symnum_fcn = (fcn_sym); \ tmp_bf_ptr->next = NULL; \ \ current_head_bf_list = saved_bf_list = tmp_bf_ptr; \ saved_bf_list_end = tmp_bf_ptr; \ } \ else \ { \ tmp_bf_ptr = allocate_saved_bf_node(); \ \ tmp_bf_ptr->symnum_bf = (bf_sym); \ tmp_bf_ptr->symnum_fcn = (fcn_sym); \ tmp_bf_ptr->next = NULL; \ \ saved_bf_list_end->next = tmp_bf_ptr; \ saved_bf_list_end = tmp_bf_ptr; \ } #endif /* This function frees the entire (.bf,function) list. */ #if 0 static void clear_bf_list (void) { SAVED_BF_PTR tmp = saved_bf_list; SAVED_BF_PTR next = NULL; while (tmp != NULL) { next = tmp->next; xfree (tmp); tmp = next; } saved_bf_list = NULL; } #endif int global_remote_debug; #if 0 static long get_bf_for_fcn (long the_function) { SAVED_BF_PTR tmp; int nprobes = 0; /* First use a simple queuing algorithm (i.e. look and see if the item at the head of the queue is the one you want). */ if (saved_bf_list == NULL) internal_error (__FILE__, __LINE__, _("cannot get .bf node off empty list")); if (current_head_bf_list != NULL) if (current_head_bf_list->symnum_fcn == the_function) { if (global_remote_debug) fprintf_unfiltered (gdb_stderr, "*"); tmp = current_head_bf_list; current_head_bf_list = current_head_bf_list->next; return (tmp->symnum_bf); } /* If the above did not work (probably because #line directives were used in the sourcefile and they messed up our internal tables) we now do the ugly linear scan. */ if (global_remote_debug) fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n"); nprobes = 0; tmp = saved_bf_list; while (tmp != NULL) { nprobes++; if (tmp->symnum_fcn == the_function) { if (global_remote_debug) fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes); current_head_bf_list = tmp->next; return (tmp->symnum_bf); } tmp = tmp->next; } return (-1); } static SAVED_FUNCTION_PTR saved_function_list = NULL; static SAVED_FUNCTION_PTR saved_function_list_end = NULL; static void clear_function_list (void) { SAVED_FUNCTION_PTR tmp = saved_function_list; SAVED_FUNCTION_PTR next = NULL; while (tmp != NULL) { next = tmp->next; xfree (tmp); tmp = next; } saved_function_list = NULL; } #endif