| /* Support for printing Fortran values for GDB, the GNU debugger. |
| |
| Copyright (C) 1993-2016 Free Software Foundation, Inc. |
| |
| Contributed by Motorola. Adapted from the C definitions by Farooq Butt |
| (fmbutt@engage.sps.mot.com), additionally worked over by Stan Shebs. |
| |
| 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/>. */ |
| |
| #include "defs.h" |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "expression.h" |
| #include "value.h" |
| #include "valprint.h" |
| #include "language.h" |
| #include "f-lang.h" |
| #include "frame.h" |
| #include "gdbcore.h" |
| #include "command.h" |
| #include "block.h" |
| #include "dictionary.h" |
| |
| extern void _initialize_f_valprint (void); |
| static void info_common_command (char *, int); |
| static void f77_get_dynamic_length_of_aggregate (struct type *); |
| |
| int f77_array_offset_tbl[MAX_FORTRAN_DIMS + 1][2]; |
| |
| /* Array which holds offsets to be applied to get a row's elements |
| for a given array. Array also holds the size of each subarray. */ |
| |
| int |
| f77_get_lowerbound (struct type *type) |
| { |
| if (TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type)) |
| error (_("Lower bound may not be '*' in F77")); |
| |
| return TYPE_ARRAY_LOWER_BOUND_VALUE (type); |
| } |
| |
| int |
| f77_get_upperbound (struct type *type) |
| { |
| if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
| { |
| /* We have an assumed size array on our hands. Assume that |
| upper_bound == lower_bound so that we show at least 1 element. |
| If the user wants to see more elements, let him manually ask for 'em |
| and we'll subscript the array and show him. */ |
| |
| return f77_get_lowerbound (type); |
| } |
| |
| return TYPE_ARRAY_UPPER_BOUND_VALUE (type); |
| } |
| |
| /* Obtain F77 adjustable array dimensions. */ |
| |
| static void |
| f77_get_dynamic_length_of_aggregate (struct type *type) |
| { |
| int upper_bound = -1; |
| int lower_bound = 1; |
| |
| /* Recursively go all the way down into a possibly multi-dimensional |
| F77 array and get the bounds. For simple arrays, this is pretty |
| easy but when the bounds are dynamic, we must be very careful |
| to add up all the lengths correctly. Not doing this right |
| will lead to horrendous-looking arrays in parameter lists. |
| |
| This function also works for strings which behave very |
| similarly to arrays. */ |
| |
| if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY |
| || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRING) |
| f77_get_dynamic_length_of_aggregate (TYPE_TARGET_TYPE (type)); |
| |
| /* Recursion ends here, start setting up lengths. */ |
| lower_bound = f77_get_lowerbound (type); |
| upper_bound = f77_get_upperbound (type); |
| |
| /* Patch in a valid length value. */ |
| |
| TYPE_LENGTH (type) = |
| (upper_bound - lower_bound + 1) |
| * TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type))); |
| } |
| |
| /* Actual function which prints out F77 arrays, Valaddr == address in |
| the superior. Address == the address in the inferior. */ |
| |
| static void |
| f77_print_array_1 (int nss, int ndimensions, struct type *type, |
| const gdb_byte *valaddr, |
| int embedded_offset, CORE_ADDR address, |
| struct ui_file *stream, int recurse, |
| const struct value *val, |
| const struct value_print_options *options, |
| int *elts) |
| { |
| struct type *range_type = TYPE_INDEX_TYPE (check_typedef (type)); |
| CORE_ADDR addr = address + embedded_offset; |
| LONGEST lowerbound, upperbound; |
| int i; |
| |
| get_discrete_bounds (range_type, &lowerbound, &upperbound); |
| |
| if (nss != ndimensions) |
| { |
| size_t dim_size = TYPE_LENGTH (TYPE_TARGET_TYPE (type)); |
| size_t offs = 0; |
| |
| for (i = lowerbound; |
| (i < upperbound + 1 && (*elts) < options->print_max); |
| i++) |
| { |
| struct value *subarray = value_from_contents_and_address |
| (TYPE_TARGET_TYPE (type), value_contents_for_printing_const (val) |
| + offs, addr + offs); |
| |
| fprintf_filtered (stream, "( "); |
| f77_print_array_1 (nss + 1, ndimensions, value_type (subarray), |
| value_contents_for_printing (subarray), |
| value_embedded_offset (subarray), |
| value_address (subarray), |
| stream, recurse, subarray, options, elts); |
| offs += dim_size; |
| fprintf_filtered (stream, ") "); |
| } |
| if (*elts >= options->print_max && i < upperbound) |
| fprintf_filtered (stream, "..."); |
| } |
| else |
| { |
| for (i = lowerbound; i < upperbound + 1 && (*elts) < options->print_max; |
| i++, (*elts)++) |
| { |
| struct value *elt = value_subscript ((struct value *)val, i); |
| |
| val_print (value_type (elt), |
| value_embedded_offset (elt), |
| value_address (elt), stream, recurse, |
| elt, options, current_language); |
| |
| if (i != upperbound) |
| fprintf_filtered (stream, ", "); |
| |
| if ((*elts == options->print_max - 1) |
| && (i != upperbound)) |
| fprintf_filtered (stream, "..."); |
| } |
| } |
| } |
| |
| /* This function gets called to print an F77 array, we set up some |
| stuff and then immediately call f77_print_array_1(). */ |
| |
| static void |
| f77_print_array (struct type *type, const gdb_byte *valaddr, |
| int embedded_offset, |
| CORE_ADDR address, struct ui_file *stream, |
| int recurse, |
| const struct value *val, |
| const struct value_print_options *options) |
| { |
| int ndimensions; |
| int elts = 0; |
| |
| ndimensions = calc_f77_array_dims (type); |
| |
| if (ndimensions > MAX_FORTRAN_DIMS || ndimensions < 0) |
| error (_("\ |
| Type node corrupt! F77 arrays cannot have %d subscripts (%d Max)"), |
| ndimensions, MAX_FORTRAN_DIMS); |
| |
| f77_print_array_1 (1, ndimensions, type, valaddr, embedded_offset, |
| address, stream, recurse, val, options, &elts); |
| } |
| |
| |
| /* Decorations for Fortran. */ |
| |
| static const struct generic_val_print_decorations f_decorations = |
| { |
| "(", |
| ",", |
| ")", |
| ".TRUE.", |
| ".FALSE.", |
| "VOID", |
| "{", |
| "}" |
| }; |
| |
| /* See val_print for a description of the various parameters of this |
| function; they are identical. */ |
| |
| void |
| f_val_print (struct type *type, int embedded_offset, |
| CORE_ADDR address, struct ui_file *stream, int recurse, |
| struct value *original_value, |
| const struct value_print_options *options) |
| { |
| struct gdbarch *gdbarch = get_type_arch (type); |
| enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| int printed_field = 0; /* Number of fields printed. */ |
| struct type *elttype; |
| CORE_ADDR addr; |
| int index; |
| const gdb_byte *valaddr =value_contents_for_printing (original_value); |
| |
| type = check_typedef (type); |
| switch (TYPE_CODE (type)) |
| { |
| case TYPE_CODE_STRING: |
| f77_get_dynamic_length_of_aggregate (type); |
| LA_PRINT_STRING (stream, builtin_type (gdbarch)->builtin_char, |
| valaddr + embedded_offset, |
| TYPE_LENGTH (type), NULL, 0, options); |
| break; |
| |
| case TYPE_CODE_ARRAY: |
| if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_CHAR) |
| { |
| fprintf_filtered (stream, "("); |
| f77_print_array (type, valaddr, embedded_offset, |
| address, stream, recurse, original_value, options); |
| fprintf_filtered (stream, ")"); |
| } |
| else |
| { |
| struct type *ch_type = TYPE_TARGET_TYPE (type); |
| |
| f77_get_dynamic_length_of_aggregate (type); |
| LA_PRINT_STRING (stream, ch_type, |
| valaddr + embedded_offset, |
| TYPE_LENGTH (type) / TYPE_LENGTH (ch_type), |
| NULL, 0, options); |
| } |
| break; |
| |
| case TYPE_CODE_PTR: |
| if (options->format && options->format != 's') |
| { |
| val_print_scalar_formatted (type, embedded_offset, |
| original_value, options, 0, stream); |
| break; |
| } |
| else |
| { |
| int want_space = 0; |
| |
| addr = unpack_pointer (type, valaddr + embedded_offset); |
| elttype = check_typedef (TYPE_TARGET_TYPE (type)); |
| |
| if (TYPE_CODE (elttype) == TYPE_CODE_FUNC) |
| { |
| /* Try to print what function it points to. */ |
| print_function_pointer_address (options, gdbarch, addr, stream); |
| return; |
| } |
| |
| if (options->symbol_print) |
| want_space = print_address_demangle (options, gdbarch, addr, |
| stream, demangle); |
| else if (options->addressprint && options->format != 's') |
| { |
| fputs_filtered (paddress (gdbarch, addr), stream); |
| want_space = 1; |
| } |
| |
| /* For a pointer to char or unsigned char, also print the string |
| pointed to, unless pointer is null. */ |
| if (TYPE_LENGTH (elttype) == 1 |
| && TYPE_CODE (elttype) == TYPE_CODE_INT |
| && (options->format == 0 || options->format == 's') |
| && addr != 0) |
| { |
| if (want_space) |
| fputs_filtered (" ", stream); |
| val_print_string (TYPE_TARGET_TYPE (type), NULL, addr, -1, |
| stream, options); |
| } |
| return; |
| } |
| break; |
| |
| case TYPE_CODE_INT: |
| if (options->format || options->output_format) |
| { |
| struct value_print_options opts = *options; |
| |
| opts.format = (options->format ? options->format |
| : options->output_format); |
| val_print_scalar_formatted (type, embedded_offset, |
| original_value, &opts, 0, stream); |
| } |
| else |
| { |
| val_print_type_code_int (type, valaddr + embedded_offset, stream); |
| /* C and C++ has no single byte int type, char is used instead. |
| Since we don't know whether the value is really intended to |
| be used as an integer or a character, print the character |
| equivalent as well. */ |
| if (TYPE_LENGTH (type) == 1) |
| { |
| LONGEST c; |
| |
| fputs_filtered (" ", stream); |
| c = unpack_long (type, valaddr + embedded_offset); |
| LA_PRINT_CHAR ((unsigned char) c, type, stream); |
| } |
| } |
| break; |
| |
| case TYPE_CODE_STRUCT: |
| case TYPE_CODE_UNION: |
| /* Starting from the Fortran 90 standard, Fortran supports derived |
| types. */ |
| fprintf_filtered (stream, "( "); |
| for (index = 0; index < TYPE_NFIELDS (type); index++) |
| { |
| struct value *field = value_field |
| ((struct value *)original_value, index); |
| |
| struct type *field_type = check_typedef (TYPE_FIELD_TYPE (type, index)); |
| |
| |
| if (TYPE_CODE (field_type) != TYPE_CODE_FUNC) |
| { |
| const char *field_name; |
| |
| if (printed_field > 0) |
| fputs_filtered (", ", stream); |
| |
| field_name = TYPE_FIELD_NAME (type, index); |
| if (field_name != NULL) |
| { |
| fputs_filtered (field_name, stream); |
| fputs_filtered (" = ", stream); |
| } |
| |
| val_print (value_type (field), |
| value_embedded_offset (field), |
| value_address (field), stream, recurse + 1, |
| field, options, current_language); |
| |
| ++printed_field; |
| } |
| } |
| fprintf_filtered (stream, " )"); |
| break; |
| |
| case TYPE_CODE_REF: |
| case TYPE_CODE_FUNC: |
| case TYPE_CODE_FLAGS: |
| case TYPE_CODE_FLT: |
| case TYPE_CODE_VOID: |
| case TYPE_CODE_ERROR: |
| case TYPE_CODE_RANGE: |
| case TYPE_CODE_UNDEF: |
| case TYPE_CODE_COMPLEX: |
| case TYPE_CODE_BOOL: |
| case TYPE_CODE_CHAR: |
| default: |
| generic_val_print (type, embedded_offset, address, |
| stream, recurse, original_value, options, |
| &f_decorations); |
| break; |
| } |
| gdb_flush (stream); |
| } |
| |
| static void |
| info_common_command_for_block (const struct block *block, const char *comname, |
| int *any_printed) |
| { |
| struct block_iterator iter; |
| struct symbol *sym; |
| const char *name; |
| struct value_print_options opts; |
| |
| get_user_print_options (&opts); |
| |
| ALL_BLOCK_SYMBOLS (block, iter, sym) |
| if (SYMBOL_DOMAIN (sym) == COMMON_BLOCK_DOMAIN) |
| { |
| const struct common_block *common = SYMBOL_VALUE_COMMON_BLOCK (sym); |
| size_t index; |
| |
| gdb_assert (SYMBOL_CLASS (sym) == LOC_COMMON_BLOCK); |
| |
| if (comname && (!SYMBOL_LINKAGE_NAME (sym) |
| || strcmp (comname, SYMBOL_LINKAGE_NAME (sym)) != 0)) |
| continue; |
| |
| if (*any_printed) |
| putchar_filtered ('\n'); |
| else |
| *any_printed = 1; |
| if (SYMBOL_PRINT_NAME (sym)) |
| printf_filtered (_("Contents of F77 COMMON block '%s':\n"), |
| SYMBOL_PRINT_NAME (sym)); |
| else |
| printf_filtered (_("Contents of blank COMMON block:\n")); |
| |
| for (index = 0; index < common->n_entries; index++) |
| { |
| struct value *val = NULL; |
| |
| printf_filtered ("%s = ", |
| SYMBOL_PRINT_NAME (common->contents[index])); |
| |
| TRY |
| { |
| val = value_of_variable (common->contents[index], block); |
| value_print (val, gdb_stdout, &opts); |
| } |
| |
| CATCH (except, RETURN_MASK_ERROR) |
| { |
| printf_filtered ("<error reading variable: %s>", except.message); |
| } |
| END_CATCH |
| |
| putchar_filtered ('\n'); |
| } |
| } |
| } |
| |
| /* This function is used to print out the values in a given COMMON |
| block. It will always use the most local common block of the |
| given name. */ |
| |
| static void |
| info_common_command (char *comname, int from_tty) |
| { |
| struct frame_info *fi; |
| const struct block *block; |
| int values_printed = 0; |
| |
| /* We have been told to display the contents of F77 COMMON |
| block supposedly visible in this function. Let us |
| first make sure that it is visible and if so, let |
| us display its contents. */ |
| |
| fi = get_selected_frame (_("No frame selected")); |
| |
| /* The following is generally ripped off from stack.c's routine |
| print_frame_info(). */ |
| |
| block = get_frame_block (fi, 0); |
| if (block == NULL) |
| { |
| printf_filtered (_("No symbol table info available.\n")); |
| return; |
| } |
| |
| while (block) |
| { |
| info_common_command_for_block (block, comname, &values_printed); |
| /* After handling the function's top-level block, stop. Don't |
| continue to its superblock, the block of per-file symbols. */ |
| if (BLOCK_FUNCTION (block)) |
| break; |
| block = BLOCK_SUPERBLOCK (block); |
| } |
| |
| if (!values_printed) |
| { |
| if (comname) |
| printf_filtered (_("No common block '%s'.\n"), comname); |
| else |
| printf_filtered (_("No common blocks.\n")); |
| } |
| } |
| |
| void |
| _initialize_f_valprint (void) |
| { |
| add_info ("common", info_common_command, |
| _("Print out the values contained in a Fortran COMMON block.")); |
| } |