gdb/d-lang.c

   1 /* D language support routines for GDB, the GNU debugger.
   2
   3    Copyright (C) 2005-2020 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "symtab.h"
  22 #include "language.h"
  23 #include "varobj.h"
  24 #include "d-lang.h"
  25 #include "c-lang.h"
  26 #include "demangle.h"
  27 #include "cp-support.h"
  28 #include "gdbarch.h"
  29
  30 /* The name of the symbol to use to get the name of the main subprogram.  */
  31 static const char D_MAIN[] = "D main";
  32
  33 /* Function returning the special symbol name used by D for the main
  34    procedure in the main program if it is found in minimal symbol list.
  35    This function tries to find minimal symbols so that it finds them even
  36    if the program was compiled without debugging information.  */
  37
  38 const char *
  39 d_main_name (void)
  40 {
  41   struct bound_minimal_symbol msym;
  42
  43   msym = lookup_minimal_symbol (D_MAIN, NULL, NULL);
  44   if (msym.minsym != NULL)
  45     return D_MAIN;
  46
  47   /* No known entry procedure found, the main program is probably not D.  */
  48   return NULL;
  49 }
  50
  51 /* Implements the la_demangle language_defn routine for language D.  */
  52
  53 char *
  54 d_demangle (const char *symbol, int options)
  55 {
  56   return gdb_demangle (symbol, options | DMGL_DLANG);
  57 }
  58
  59 /* Table mapping opcodes into strings for printing operators
  60    and precedences of the operators.  */
  61 static const struct op_print d_op_print_tab[] =
  62 {
  63   {",", BINOP_COMMA, PREC_COMMA, 0},
  64   {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
  65   {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
  66   {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
  67   {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
  68   {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
  69   {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
  70   {"==", BINOP_EQUAL, PREC_ORDER, 0},
  71   {"!=", BINOP_NOTEQUAL, PREC_ORDER, 0},
  72   {"<=", BINOP_LEQ, PREC_ORDER, 0},
  73   {">=", BINOP_GEQ, PREC_ORDER, 0},
  74   {">", BINOP_GTR, PREC_ORDER, 0},
  75   {"<", BINOP_LESS, PREC_ORDER, 0},
  76   {">>", BINOP_RSH, PREC_SHIFT, 0},
  77   {"<<", BINOP_LSH, PREC_SHIFT, 0},
  78   {"+", BINOP_ADD, PREC_ADD, 0},
  79   {"-", BINOP_SUB, PREC_ADD, 0},
  80   {"~", BINOP_CONCAT, PREC_ADD, 0},
  81   {"*", BINOP_MUL, PREC_MUL, 0},
  82   {"/", BINOP_DIV, PREC_MUL, 0},
  83   {"%", BINOP_REM, PREC_MUL, 0},
  84   {"^^", BINOP_EXP, PREC_REPEAT, 0},
  85   {"@", BINOP_REPEAT, PREC_REPEAT, 0},
  86   {"-", UNOP_NEG, PREC_PREFIX, 0},
  87   {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
  88   {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
  89   {"*", UNOP_IND, PREC_PREFIX, 0},
  90   {"&", UNOP_ADDR, PREC_PREFIX, 0},
  91   {"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
  92   {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
  93   {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
  94   {NULL, OP_NULL, PREC_PREFIX, 0}
  95 };
  96
  97 /* Mapping of all D basic data types into the language vector.  */
  98
  99 enum d_primitive_types {
 100   d_primitive_type_void,
 101   d_primitive_type_bool,
 102   d_primitive_type_byte,
 103   d_primitive_type_ubyte,
 104   d_primitive_type_short,
 105   d_primitive_type_ushort,
 106   d_primitive_type_int,
 107   d_primitive_type_uint,
 108   d_primitive_type_long,
 109   d_primitive_type_ulong,
 110   d_primitive_type_cent,    /* Signed 128 bit integer.  */
 111   d_primitive_type_ucent,   /* Unsigned 128 bit integer.  */
 112   d_primitive_type_float,
 113   d_primitive_type_double,
 114   d_primitive_type_real,
 115   d_primitive_type_ifloat,  /* Imaginary float types.  */
 116   d_primitive_type_idouble,
 117   d_primitive_type_ireal,
 118   d_primitive_type_cfloat,  /* Complex number of two float values.  */
 119   d_primitive_type_cdouble,
 120   d_primitive_type_creal,
 121   d_primitive_type_char,    /* Unsigned character types.  */
 122   d_primitive_type_wchar,
 123   d_primitive_type_dchar,
 124   nr_d_primitive_types
 125 };
 126
 127 static const char *d_extensions[] =
 128 {
 129   ".d", NULL
 130 };
 131
 132 /* Constant data that describes the D language.  */
 133
 134 extern const struct language_data d_language_data =
 135 {
 136   "d",
 137   "D",
 138   language_d,
 139   range_check_off,
 140   case_sensitive_on,
 141   array_row_major,
 142   macro_expansion_no,
 143   d_extensions,
 144   &exp_descriptor_c,
 145   d_parse,
 146   null_post_parser,
 147   c_printchar,                  /* Print a character constant.  */
 148   c_printstr,                   /* Function to print string constant.  */
 149   c_emit_char,                  /* Print a single char.  */
 150   c_print_type,                 /* Print a type using appropriate syntax.  */
 151   c_print_typedef,              /* Print a typedef using appropriate
 152                                    syntax.  */
 153   d_value_print_inner,          /* la_value_print_inner */
 154   c_value_print,                /* Print a top-level value.  */
 155   NULL,                         /* Language specific skip_trampoline.  */
 156   "this",
 157   false,                        /* la_store_sym_names_in_linkage_form_p */
 158   d_lookup_symbol_nonlocal,
 159   d_demangle,                   /* Language specific symbol demangler.  */
 160   NULL,                         /* Language specific
 161                                    class_name_from_physname.  */
 162   d_op_print_tab,               /* Expression operators for printing.  */
 163   1,                            /* C-style arrays.  */
 164   0,                            /* String lower bound.  */
 165   default_word_break_characters,
 166   default_collect_symbol_completion_matches,
 167   c_watch_location_expression,
 168   NULL,                         /* la_get_symbol_name_matcher */
 169   &default_varobj_ops,
 170   NULL,
 171   c_is_string_type_p,
 172   "{...}"                       /* la_struct_too_deep_ellipsis */
 173 };
 174
 175 /* Class representing the D language.  */
 176
 177 class d_language : public language_defn
 178 {
 179 public:
 180   d_language ()
 181     : language_defn (language_d, d_language_data)
 182   { /* Nothing.  */ }
 183
 184   /* See language.h.  */
 185   void language_arch_info (struct gdbarch *gdbarch,
 186                            struct language_arch_info *lai) const override
 187   {
 188     const struct builtin_d_type *builtin = builtin_d_type (gdbarch);
 189
 190     lai->string_char_type = builtin->builtin_char;
 191     lai->primitive_type_vector
 192       = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_d_primitive_types + 1,
 193                                 struct type *);
 194
 195     lai->primitive_type_vector [d_primitive_type_void]
 196       = builtin->builtin_void;
 197     lai->primitive_type_vector [d_primitive_type_bool]
 198       = builtin->builtin_bool;
 199     lai->primitive_type_vector [d_primitive_type_byte]
 200       = builtin->builtin_byte;
 201     lai->primitive_type_vector [d_primitive_type_ubyte]
 202       = builtin->builtin_ubyte;
 203     lai->primitive_type_vector [d_primitive_type_short]
 204       = builtin->builtin_short;
 205     lai->primitive_type_vector [d_primitive_type_ushort]
 206       = builtin->builtin_ushort;
 207     lai->primitive_type_vector [d_primitive_type_int]
 208       = builtin->builtin_int;
 209     lai->primitive_type_vector [d_primitive_type_uint]
 210       = builtin->builtin_uint;
 211     lai->primitive_type_vector [d_primitive_type_long]
 212       = builtin->builtin_long;
 213     lai->primitive_type_vector [d_primitive_type_ulong]
 214       = builtin->builtin_ulong;
 215     lai->primitive_type_vector [d_primitive_type_cent]
 216       = builtin->builtin_cent;
 217     lai->primitive_type_vector [d_primitive_type_ucent]
 218       = builtin->builtin_ucent;
 219     lai->primitive_type_vector [d_primitive_type_float]
 220       = builtin->builtin_float;
 221     lai->primitive_type_vector [d_primitive_type_double]
 222       = builtin->builtin_double;
 223     lai->primitive_type_vector [d_primitive_type_real]
 224       = builtin->builtin_real;
 225     lai->primitive_type_vector [d_primitive_type_ifloat]
 226       = builtin->builtin_ifloat;
 227     lai->primitive_type_vector [d_primitive_type_idouble]
 228       = builtin->builtin_idouble;
 229     lai->primitive_type_vector [d_primitive_type_ireal]
 230       = builtin->builtin_ireal;
 231     lai->primitive_type_vector [d_primitive_type_cfloat]
 232       = builtin->builtin_cfloat;
 233     lai->primitive_type_vector [d_primitive_type_cdouble]
 234       = builtin->builtin_cdouble;
 235     lai->primitive_type_vector [d_primitive_type_creal]
 236       = builtin->builtin_creal;
 237     lai->primitive_type_vector [d_primitive_type_char]
 238       = builtin->builtin_char;
 239     lai->primitive_type_vector [d_primitive_type_wchar]
 240       = builtin->builtin_wchar;
 241     lai->primitive_type_vector [d_primitive_type_dchar]
 242       = builtin->builtin_dchar;
 243
 244     lai->bool_type_symbol = "bool";
 245     lai->bool_type_default = builtin->builtin_bool;
 246   }
 247
 248   /* See language.h.  */
 249   bool sniff_from_mangled_name (const char *mangled,
 250                                 char **demangled) const override
 251   {
 252     *demangled = d_demangle (mangled, 0);
 253     return *demangled != NULL;
 254   }
 255 };
 256
 257 /* Single instance of the D language class.  */
 258
 259 static d_language d_language_defn;
 260
 261 /* Build all D language types for the specified architecture.  */
 262
 263 static void *
 264 build_d_types (struct gdbarch *gdbarch)
 265 {
 266   struct builtin_d_type *builtin_d_type
 267     = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_d_type);
 268
 269   /* Basic types.  */
 270   builtin_d_type->builtin_void
 271     = arch_type (gdbarch, TYPE_CODE_VOID, TARGET_CHAR_BIT, "void");
 272   builtin_d_type->builtin_bool
 273     = arch_boolean_type (gdbarch, 8, 1, "bool");
 274   builtin_d_type->builtin_byte
 275     = arch_integer_type (gdbarch, 8, 0, "byte");
 276   builtin_d_type->builtin_ubyte
 277     = arch_integer_type (gdbarch, 8, 1, "ubyte");
 278   builtin_d_type->builtin_short
 279     = arch_integer_type (gdbarch, 16, 0, "short");
 280   builtin_d_type->builtin_ushort
 281     = arch_integer_type (gdbarch, 16, 1, "ushort");
 282   builtin_d_type->builtin_int
 283     = arch_integer_type (gdbarch, 32, 0, "int");
 284   builtin_d_type->builtin_uint
 285     = arch_integer_type (gdbarch, 32, 1, "uint");
 286   builtin_d_type->builtin_long
 287     = arch_integer_type (gdbarch, 64, 0, "long");
 288   builtin_d_type->builtin_ulong
 289     = arch_integer_type (gdbarch, 64, 1, "ulong");
 290   builtin_d_type->builtin_cent
 291     = arch_integer_type (gdbarch, 128, 0, "cent");
 292   builtin_d_type->builtin_ucent
 293     = arch_integer_type (gdbarch, 128, 1, "ucent");
 294   builtin_d_type->builtin_float
 295     = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
 296                        "float", gdbarch_float_format (gdbarch));
 297   builtin_d_type->builtin_double
 298     = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
 299                        "double", gdbarch_double_format (gdbarch));
 300   builtin_d_type->builtin_real
 301     = arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch),
 302                        "real", gdbarch_long_double_format (gdbarch));
 303
 304   TYPE_INSTANCE_FLAGS (builtin_d_type->builtin_byte)
 305     |= TYPE_INSTANCE_FLAG_NOTTEXT;
 306   TYPE_INSTANCE_FLAGS (builtin_d_type->builtin_ubyte)
 307     |= TYPE_INSTANCE_FLAG_NOTTEXT;
 308
 309   /* Imaginary and complex types.  */
 310   builtin_d_type->builtin_ifloat
 311     = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
 312                        "ifloat", gdbarch_float_format (gdbarch));
 313   builtin_d_type->builtin_idouble
 314     = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
 315                        "idouble", gdbarch_double_format (gdbarch));
 316   builtin_d_type->builtin_ireal
 317     = arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch),
 318                        "ireal", gdbarch_long_double_format (gdbarch));
 319   builtin_d_type->builtin_cfloat
 320     = init_complex_type ("cfloat", builtin_d_type->builtin_float);
 321   builtin_d_type->builtin_cdouble
 322     = init_complex_type ("cdouble", builtin_d_type->builtin_double);
 323   builtin_d_type->builtin_creal
 324     = init_complex_type ("creal", builtin_d_type->builtin_real);
 325
 326   /* Character types.  */
 327   builtin_d_type->builtin_char
 328     = arch_character_type (gdbarch, 8, 1, "char");
 329   builtin_d_type->builtin_wchar
 330     = arch_character_type (gdbarch, 16, 1, "wchar");
 331   builtin_d_type->builtin_dchar
 332     = arch_character_type (gdbarch, 32, 1, "dchar");
 333
 334   return builtin_d_type;
 335 }
 336
 337 static struct gdbarch_data *d_type_data;
 338
 339 /* Return the D type table for the specified architecture.  */
 340
 341 const struct builtin_d_type *
 342 builtin_d_type (struct gdbarch *gdbarch)
 343 {
 344   return (const struct builtin_d_type *) gdbarch_data (gdbarch, d_type_data);
 345 }
 346
 347 void _initialize_d_language ();
 348 void
 349 _initialize_d_language ()
 350 {
 351   d_type_data = gdbarch_data_register_post_init (build_d_types);
 352 }