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Diffstat (limited to 'gdb/ch-lang.c')
| -rw-r--r-- | gdb/ch-lang.c | 675 |
1 files changed, 675 insertions, 0 deletions
diff --git a/gdb/ch-lang.c b/gdb/ch-lang.c new file mode 100644 index 0000000..c54e8bb --- /dev/null +++ b/gdb/ch-lang.c @@ -0,0 +1,675 @@ +/* Chill language support routines for GDB, the GNU debugger. + Copyright 1992, 1995, 1996 Free Software Foundation, Inc. + +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 2 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, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "symtab.h" +#include "gdbtypes.h" +#include "value.h" +#include "expression.h" +#include "parser-defs.h" +#include "language.h" +#include "ch-lang.h" + +static value_ptr +evaluate_subexp_chill PARAMS ((struct type *, struct expression *, int *, enum noside)); + +static value_ptr +value_chill_max_min PARAMS ((enum exp_opcode, value_ptr)); + +static value_ptr +value_chill_card PARAMS ((value_ptr)); + +static value_ptr + value_chill_length PARAMS ((value_ptr)); + +static struct type * +chill_create_fundamental_type PARAMS ((struct objfile *, int)); + +static void +chill_printstr PARAMS ((GDB_FILE *stream, char *string, unsigned int length, int width, int force_ellipses)); + +static void +chill_printchar PARAMS ((int, GDB_FILE *)); + +/* For now, Chill uses a simple mangling algorithm whereby you simply + discard everything after the occurance of two successive CPLUS_MARKER + characters to derive the demangled form. */ + +char * +chill_demangle (mangled) + const char *mangled; +{ + const char *joiner = NULL; + char *demangled; + const char *cp = mangled; + + while (*cp) + { + if (is_cplus_marker (*cp)) + { + joiner = cp; + break; + } + cp++; + } + if (joiner != NULL && *(joiner + 1) == *joiner) + { + demangled = savestring (mangled, joiner - mangled); + } + else + { + demangled = NULL; + } + return (demangled); +} + +static void +chill_printchar (c, stream) + register int c; + GDB_FILE *stream; +{ + c &= 0xFF; /* Avoid sign bit follies */ + + if (PRINT_LITERAL_FORM (c)) + { + if (c == '\'' || c == '^') + fprintf_filtered (stream, "'%c%c'", c, c); + else + fprintf_filtered (stream, "'%c'", c); + } + else + { + fprintf_filtered (stream, "'^(%u)'", (unsigned int) c); + } +} + +/* 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. + Note that gdb maintains the length of strings without counting the + terminating null byte, while chill strings are typically written with + an explicit null byte. So we always assume an implied null byte + until gdb is able to maintain non-null terminated strings as well + as null terminated strings (FIXME). + */ + +static void +chill_printstr (stream, string, length, width, force_ellipses) + GDB_FILE *stream; + char *string; + unsigned int length; + int width; + int force_ellipses; +{ + register unsigned int i; + unsigned int things_printed = 0; + int in_literal_form = 0; + int in_control_form = 0; + int need_slashslash = 0; + unsigned int c; + extern int repeat_count_threshold; + extern int print_max; + + if (length == 0) + { + fputs_filtered ("\"\"", stream); + return; + } + + for (i = 0; i < length && things_printed < print_max; ++i) + { + /* Position of the character we are examining + to see whether it is repeated. */ + unsigned int rep1; + /* Number of repetitions we have detected so far. */ + unsigned int reps; + + QUIT; + + if (need_slashslash) + { + fputs_filtered ("//", stream); + need_slashslash = 0; + } + + rep1 = i + 1; + reps = 1; + while (rep1 < length && string[rep1] == string[i]) + { + ++rep1; + ++reps; + } + + c = string[i]; + if (reps > repeat_count_threshold) + { + if (in_control_form || in_literal_form) + { + if (in_control_form) + fputs_filtered (")", stream); + fputs_filtered ("\"//", stream); + in_control_form = in_literal_form = 0; + } + chill_printchar (c, stream); + fprintf_filtered (stream, "<repeats %u times>", reps); + i = rep1 - 1; + things_printed += repeat_count_threshold; + need_slashslash = 1; + } + else + { + if (! in_literal_form && ! in_control_form) + fputs_filtered ("\"", stream); + if (PRINT_LITERAL_FORM (c)) + { + if (!in_literal_form) + { + if (in_control_form) + { + fputs_filtered (")", stream); + in_control_form = 0; + } + in_literal_form = 1; + } + fprintf_filtered (stream, "%c", c); + if (c == '"' || c == '^') + /* duplicate this one as must be done at input */ + fprintf_filtered (stream, "%c", c); + } + else + { + if (!in_control_form) + { + if (in_literal_form) + { + in_literal_form = 0; + } + fputs_filtered ("^(", stream); + in_control_form = 1; + } + else + fprintf_filtered (stream, ","); + c = c & 0xff; + fprintf_filtered (stream, "%u", (unsigned int) c); + } + ++things_printed; + } + } + + /* Terminate the quotes if necessary. */ + if (in_control_form) + { + fputs_filtered (")", stream); + } + if (in_literal_form || in_control_form) + { + fputs_filtered ("\"", stream); + } + if (force_ellipses || (i < length)) + { + fputs_filtered ("...", stream); + } +} + +static struct type * +chill_create_fundamental_type (objfile, typeid) + struct objfile *objfile; + int typeid; +{ + register struct type *type = NULL; + + switch (typeid) + { + default: + /* FIXME: For now, if we are asked to produce a type not in this + language, create the equivalent of a C integer type with the + name "<?type?>". When all the dust settles from the type + reconstruction work, this should probably become an error. */ + type = init_type (TYPE_CODE_INT, 2, 0, "<?type?>", objfile); + warning ("internal error: no chill fundamental type %d", typeid); + break; + case FT_VOID: + /* FIXME: Currently the GNU Chill compiler emits some DWARF entries for + typedefs, unrelated to anything directly in the code being compiled, + that have some FT_VOID types. Just fake it for now. */ + type = init_type (TYPE_CODE_VOID, 0, 0, "<?VOID?>", objfile); + break; + case FT_BOOLEAN: + type = init_type (TYPE_CODE_BOOL, 1, TYPE_FLAG_UNSIGNED, "BOOL", objfile); + break; + case FT_CHAR: + type = init_type (TYPE_CODE_CHAR, 1, TYPE_FLAG_UNSIGNED, "CHAR", objfile); + break; + case FT_SIGNED_CHAR: + type = init_type (TYPE_CODE_INT, 1, 0, "BYTE", objfile); + break; + case FT_UNSIGNED_CHAR: + type = init_type (TYPE_CODE_INT, 1, TYPE_FLAG_UNSIGNED, "UBYTE", objfile); + break; + case FT_SHORT: /* Chill ints are 2 bytes */ + type = init_type (TYPE_CODE_INT, 2, 0, "INT", objfile); + break; + case FT_UNSIGNED_SHORT: /* Chill ints are 2 bytes */ + type = init_type (TYPE_CODE_INT, 2, TYPE_FLAG_UNSIGNED, "UINT", objfile); + break; + case FT_INTEGER: /* FIXME? */ + case FT_SIGNED_INTEGER: /* FIXME? */ + case FT_LONG: /* Chill longs are 4 bytes */ + case FT_SIGNED_LONG: /* Chill longs are 4 bytes */ + type = init_type (TYPE_CODE_INT, 4, 0, "LONG", objfile); + break; + case FT_UNSIGNED_INTEGER: /* FIXME? */ + case FT_UNSIGNED_LONG: /* Chill longs are 4 bytes */ + type = init_type (TYPE_CODE_INT, 4, TYPE_FLAG_UNSIGNED, "ULONG", objfile); + break; + case FT_FLOAT: + type = init_type (TYPE_CODE_FLT, 4, 0, "REAL", objfile); + break; + case FT_DBL_PREC_FLOAT: + type = init_type (TYPE_CODE_FLT, 8, 0, "LONG_REAL", objfile); + break; + } + return (type); +} + + +/* Table of operators and their precedences for printing expressions. */ + +static const struct op_print chill_op_print_tab[] = { + {"AND", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0}, + {"OR", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0}, + {"NOT", UNOP_LOGICAL_NOT, PREC_PREFIX, 0}, + {"MOD", BINOP_MOD, PREC_MUL, 0}, + {"REM", BINOP_REM, PREC_MUL, 0}, + {"SIZE",UNOP_SIZEOF, PREC_BUILTIN_FUNCTION, 0}, + {"LOWER",UNOP_LOWER, PREC_BUILTIN_FUNCTION, 0}, + {"UPPER",UNOP_UPPER, PREC_BUILTIN_FUNCTION, 0}, + {"CARD",UNOP_CARD, PREC_BUILTIN_FUNCTION, 0}, + {"MAX",UNOP_CHMAX, PREC_BUILTIN_FUNCTION, 0}, + {"MIN",UNOP_CHMIN, PREC_BUILTIN_FUNCTION, 0}, + {":=", BINOP_ASSIGN, PREC_ASSIGN, 1}, + {"=", BINOP_EQUAL, PREC_EQUAL, 0}, + {"/=", BINOP_NOTEQUAL, PREC_EQUAL, 0}, + {"<=", BINOP_LEQ, PREC_ORDER, 0}, + {">=", BINOP_GEQ, PREC_ORDER, 0}, + {">", BINOP_GTR, PREC_ORDER, 0}, + {"<", BINOP_LESS, PREC_ORDER, 0}, + {"+", BINOP_ADD, PREC_ADD, 0}, + {"-", BINOP_SUB, PREC_ADD, 0}, + {"*", BINOP_MUL, PREC_MUL, 0}, + {"/", BINOP_DIV, PREC_MUL, 0}, + {"//", BINOP_CONCAT, PREC_PREFIX, 0}, /* FIXME: precedence? */ + {"-", UNOP_NEG, PREC_PREFIX, 0}, + {"->", UNOP_IND, PREC_SUFFIX, 1}, + {"->", UNOP_ADDR, PREC_PREFIX, 0}, + {":", BINOP_RANGE, PREC_ASSIGN, 0}, + {NULL, 0, 0, 0} +}; + +/* The built-in types of Chill. */ + +struct type *builtin_type_chill_bool; +struct type *builtin_type_chill_char; +struct type *builtin_type_chill_long; +struct type *builtin_type_chill_ulong; +struct type *builtin_type_chill_real; + +struct type ** CONST_PTR (chill_builtin_types[]) = +{ + &builtin_type_chill_bool, + &builtin_type_chill_char, + &builtin_type_chill_long, + &builtin_type_chill_ulong, + &builtin_type_chill_real, + 0 +}; + +/* Calculate LOWER or UPPER of TYPE. + Returns the result as an integer. + *RESULT_TYPE is the appropriate type for the result. */ + +LONGEST +type_lower_upper (op, type, result_type) + enum exp_opcode op; /* Either UNOP_LOWER or UNOP_UPPER */ + struct type *type; + struct type **result_type; +{ + LONGEST low, high; + *result_type = type; + CHECK_TYPEDEF (type); + switch (TYPE_CODE (type)) + { + case TYPE_CODE_STRUCT: + *result_type = builtin_type_int; + if (chill_varying_type (type)) + return type_lower_upper (op, TYPE_FIELD_TYPE (type, 1), result_type); + break; + case TYPE_CODE_ARRAY: + case TYPE_CODE_BITSTRING: + case TYPE_CODE_STRING: + type = TYPE_FIELD_TYPE (type, 0); /* Get index type */ + + /* ... fall through ... */ + case TYPE_CODE_RANGE: + *result_type = TYPE_TARGET_TYPE (type); + return op == UNOP_LOWER ? TYPE_LOW_BOUND (type) : TYPE_HIGH_BOUND (type); + + case TYPE_CODE_ENUM: + case TYPE_CODE_BOOL: + case TYPE_CODE_INT: + case TYPE_CODE_CHAR: + if (get_discrete_bounds (type, &low, &high) >= 0) + { + *result_type = type; + return op == UNOP_LOWER ? low : high; + } + break; + case TYPE_CODE_UNDEF: + case TYPE_CODE_PTR: + case TYPE_CODE_UNION: + case TYPE_CODE_FUNC: + case TYPE_CODE_FLT: + case TYPE_CODE_VOID: + case TYPE_CODE_SET: + case TYPE_CODE_ERROR: + case TYPE_CODE_MEMBER: + case TYPE_CODE_METHOD: + case TYPE_CODE_REF: + case TYPE_CODE_COMPLEX: + default: + break; + } + error ("unknown mode for LOWER/UPPER builtin"); +} + +static value_ptr +value_chill_length (val) + value_ptr val; +{ + LONGEST tmp; + struct type *type = VALUE_TYPE (val); + struct type *ttype; + CHECK_TYPEDEF (type); + switch (TYPE_CODE (type)) + { + case TYPE_CODE_ARRAY: + case TYPE_CODE_BITSTRING: + case TYPE_CODE_STRING: + tmp = type_lower_upper (UNOP_UPPER, type, &ttype) + - type_lower_upper (UNOP_LOWER, type, &ttype) + 1; + break; + case TYPE_CODE_STRUCT: + if (chill_varying_type (type)) + { + tmp = unpack_long (TYPE_FIELD_TYPE (type, 0), VALUE_CONTENTS (val)); + break; + } + /* ... else fall through ... */ + default: + error ("bad argument to LENGTH builtin"); + } + return value_from_longest (builtin_type_int, tmp); +} + +static value_ptr +value_chill_card (val) + value_ptr val; +{ + LONGEST tmp = 0; + struct type *type = VALUE_TYPE (val); + CHECK_TYPEDEF (type); + + if (TYPE_CODE (type) == TYPE_CODE_SET) + { + struct type *range_type = TYPE_INDEX_TYPE (type); + LONGEST lower_bound, upper_bound; + int i; + + get_discrete_bounds (range_type, &lower_bound, &upper_bound); + for (i = lower_bound; i <= upper_bound; i++) + if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0) + tmp++; + } + else + error ("bad argument to CARD builtin"); + + return value_from_longest (builtin_type_int, tmp); +} + +static value_ptr +value_chill_max_min (op, val) + enum exp_opcode op; + value_ptr val; +{ + LONGEST tmp = 0; + struct type *type = VALUE_TYPE (val); + struct type *elttype; + CHECK_TYPEDEF (type); + + if (TYPE_CODE (type) == TYPE_CODE_SET) + { + LONGEST lower_bound, upper_bound; + int i, empty = 1; + + elttype = TYPE_INDEX_TYPE (type); + CHECK_TYPEDEF (elttype); + get_discrete_bounds (elttype, &lower_bound, &upper_bound); + + if (op == UNOP_CHMAX) + { + for (i = upper_bound; i >= lower_bound; i--) + { + if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0) + { + tmp = i; + empty = 0; + break; + } + } + } + else + { + for (i = lower_bound; i <= upper_bound; i++) + { + if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0) + { + tmp = i; + empty = 0; + break; + } + } + } + if (empty) + error ("%s for empty powerset", op == UNOP_CHMAX ? "MAX" : "MIN"); + } + else + error ("bad argument to %s builtin", op == UNOP_CHMAX ? "MAX" : "MIN"); + + return value_from_longest (TYPE_CODE (elttype) == TYPE_CODE_RANGE + ? TYPE_TARGET_TYPE (elttype) + : elttype, + tmp); +} + +static value_ptr +evaluate_subexp_chill (expect_type, exp, pos, noside) + struct type *expect_type; + register struct expression *exp; + register int *pos; + enum noside noside; +{ + int pc = *pos; + struct type *type; + int tem, nargs; + value_ptr arg1; + value_ptr *argvec; + enum exp_opcode op = exp->elts[*pos].opcode; + switch (op) + { + case MULTI_SUBSCRIPT: + if (noside == EVAL_SKIP) + break; + (*pos) += 3; + nargs = longest_to_int (exp->elts[pc + 1].longconst); + arg1 = evaluate_subexp_with_coercion (exp, pos, noside); + type = check_typedef (VALUE_TYPE (arg1)); + + if (nargs == 1 && TYPE_CODE (type) == TYPE_CODE_INT) + { + /* Looks like string repetition. */ + value_ptr string = evaluate_subexp_with_coercion (exp, pos, noside); + return value_concat (arg1, string); + } + + switch (TYPE_CODE (type)) + { + case TYPE_CODE_PTR: + type = check_typedef (TYPE_TARGET_TYPE (type)); + if (!type || TYPE_CODE (type) != TYPE_CODE_FUNC) + error ("reference value used as function"); + /* ... fall through ... */ + case TYPE_CODE_FUNC: + /* It's a function call. */ + if (noside == EVAL_AVOID_SIDE_EFFECTS) + break; + + /* Allocate arg vector, including space for the function to be + called in argvec[0] and a terminating NULL */ + argvec = (value_ptr *) alloca (sizeof (value_ptr) * (nargs + 2)); + argvec[0] = arg1; + tem = 1; + for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++) + { + argvec[tem] + = evaluate_subexp_chill (TYPE_FIELD_TYPE (type, tem-1), + exp, pos, noside); + } + for (; tem <= nargs; tem++) + argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside); + argvec[tem] = 0; /* signal end of arglist */ + + return call_function_by_hand (argvec[0], nargs, argvec + 1); + default: + break; + } + + while (nargs-- > 0) + { + value_ptr index = evaluate_subexp_with_coercion (exp, pos, noside); + arg1 = value_subscript (arg1, index); + } + return (arg1); + + case UNOP_LOWER: + case UNOP_UPPER: + (*pos)++; + if (noside == EVAL_SKIP) + { + (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, EVAL_SKIP); + goto nosideret; + } + arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, + EVAL_AVOID_SIDE_EFFECTS); + tem = type_lower_upper (op, VALUE_TYPE (arg1), &type); + return value_from_longest (type, tem); + + case UNOP_LENGTH: + (*pos)++; + arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside); + return value_chill_length (arg1); + + case UNOP_CARD: + (*pos)++; + arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside); + return value_chill_card (arg1); + + case UNOP_CHMAX: + case UNOP_CHMIN: + (*pos)++; + arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside); + return value_chill_max_min (op, arg1); + + case BINOP_COMMA: + error ("',' operator used in invalid context"); + + default: + break; + } + + return evaluate_subexp_standard (expect_type, exp, pos, noside); + nosideret: + return value_from_longest (builtin_type_long, (LONGEST) 1); +} + +const struct language_defn chill_language_defn = { + "chill", + language_chill, + chill_builtin_types, + range_check_on, + type_check_on, + chill_parse, /* parser */ + chill_error, /* parser error function */ + evaluate_subexp_chill, + chill_printchar, /* print a character constant */ + chill_printstr, /* function to print a string constant */ + NULL, /* Function to print a single char */ + chill_create_fundamental_type,/* Create fundamental type in this language */ + chill_print_type, /* Print a type using appropriate syntax */ + chill_val_print, /* Print a value using appropriate syntax */ + chill_value_print, /* Print a top-levl value */ + {"", "B'", "", ""}, /* Binary format info */ + {"O'%lo", "O'", "o", ""}, /* Octal format info */ + {"D'%ld", "D'", "d", ""}, /* Decimal format info */ + {"H'%lx", "H'", "x", ""}, /* Hex format info */ + chill_op_print_tab, /* expression operators for printing */ + 0, /* arrays are first-class (not c-style) */ + 0, /* String lower bound */ + &builtin_type_chill_char, /* Type of string elements */ + LANG_MAGIC +}; + +/* Initialization for Chill */ + +void +_initialize_chill_language () +{ + builtin_type_chill_bool = + init_type (TYPE_CODE_BOOL, TARGET_CHAR_BIT / TARGET_CHAR_BIT, + TYPE_FLAG_UNSIGNED, + "BOOL", (struct objfile *) NULL); + builtin_type_chill_char = + init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT, + TYPE_FLAG_UNSIGNED, + "CHAR", (struct objfile *) NULL); + builtin_type_chill_long = + init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT, + 0, + "LONG", (struct objfile *) NULL); + builtin_type_chill_ulong = + init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT, + TYPE_FLAG_UNSIGNED, + "ULONG", (struct objfile *) NULL); + builtin_type_chill_real = + init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT, + 0, + "LONG_REAL", (struct objfile *) NULL); + + add_language (&chill_language_defn); +} |