/* Modula 2 language support routines for GDB, the GNU debugger.
- Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2002, 2003, 2004,
- 2005, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 1992-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "expression.h"
#include "parser-defs.h"
#include "language.h"
+#include "varobj.h"
#include "m2-lang.h"
#include "c-lang.h"
#include "valprint.h"
+#include "gdbarch.h"
-extern void _initialize_m2_language (void);
-static void m2_printchar (int, struct ui_file *);
-static void m2_emit_char (int, struct ui_file *, int);
-
-/* 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 Modula version. */
-
-static void
-m2_emit_char (int c, struct ui_file *stream, int quoter)
-{
-
- c &= 0xFF; /* Avoid sign bit follies */
-
- if (PRINT_LITERAL_FORM (c))
- {
- if (c == '\\' || c == quoter)
- {
- fputs_filtered ("\\", stream);
- }
- fprintf_filtered (stream, "%c", c);
- }
- else
- {
- switch (c)
- {
- case '\n':
- fputs_filtered ("\\n", stream);
- break;
- case '\b':
- fputs_filtered ("\\b", stream);
- break;
- case '\t':
- fputs_filtered ("\\t", stream);
- break;
- case '\f':
- fputs_filtered ("\\f", stream);
- break;
- case '\r':
- fputs_filtered ("\\r", stream);
- break;
- case '\033':
- fputs_filtered ("\\e", stream);
- break;
- case '\007':
- fputs_filtered ("\\a", stream);
- break;
- default:
- fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
- break;
- }
- }
-}
+static void m2_printchar (int, struct type *, struct ui_file *);
/* FIXME: This is a copy of the same function from c-exp.y. It should
be replaced with a true Modula version. */
static void
-m2_printchar (int c, struct ui_file *stream)
+m2_printchar (int c, struct type *type, struct ui_file *stream)
{
fputs_filtered ("'", stream);
- LA_EMIT_CHAR (c, 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 Modula version. */
-
-static void
-m2_printstr (struct ui_file *stream, const gdb_byte *string,
- unsigned int length, int width, int force_ellipses)
-{
- unsigned int i;
- unsigned int things_printed = 0;
- int in_quotes = 0;
- int need_comma = 0;
-
- if (length == 0)
- {
- fputs_filtered ("\"\"", gdb_stdout);
- 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_comma)
- {
- fputs_filtered (", ", stream);
- need_comma = 0;
- }
-
- rep1 = i + 1;
- reps = 1;
- while (rep1 < length && string[rep1] == string[i])
- {
- ++rep1;
- ++reps;
- }
-
- if (reps > repeat_count_threshold)
- {
- if (in_quotes)
- {
- if (inspect_it)
- fputs_filtered ("\\\", ", stream);
- else
- fputs_filtered ("\", ", stream);
- in_quotes = 0;
- }
- m2_printchar (string[i], stream);
- fprintf_filtered (stream, " <repeats %u times>", reps);
- i = rep1 - 1;
- things_printed += repeat_count_threshold;
- need_comma = 1;
- }
- else
- {
- if (!in_quotes)
- {
- if (inspect_it)
- fputs_filtered ("\\\"", stream);
- else
- fputs_filtered ("\"", stream);
- in_quotes = 1;
- }
- LA_EMIT_CHAR (string[i], stream, '"');
- ++things_printed;
- }
- }
-
- /* Terminate the quotes if necessary. */
- if (in_quotes)
- {
- if (inspect_it)
- fputs_filtered ("\\\"", stream);
- else
- fputs_filtered ("\"", stream);
- }
-
- if (force_ellipses || i < length)
- fputs_filtered ("...", stream);
-}
-
static struct value *
evaluate_subexp_modula2 (struct type *expect_type, struct expression *exp,
int *pos, enum noside noside)
struct value *arg1;
struct value *arg2;
struct type *type;
+
switch (op)
{
case UNOP_HIGH:
if (m2_is_unbounded_array (type))
{
struct value *temp = arg1;
- type = TYPE_FIELD_TYPE (type, 1);
+
+ type = type->field (1).type ();
/* i18n: Do not translate the "_m2_high" part! */
arg1 = value_struct_elt (&temp, NULL, "_m2_high", NULL,
_("unbounded structure "
if (m2_is_unbounded_array (type))
{
struct value *temp = arg1;
- type = TYPE_FIELD_TYPE (type, 0);
- if (type == NULL || (TYPE_CODE (type) != TYPE_CODE_PTR)) {
- warning (_("internal error: unbounded array structure is unknown"));
- return evaluate_subexp_standard (expect_type, exp, pos, noside);
- }
+ type = type->field (0).type ();
+ if (type == NULL || (type->code () != TYPE_CODE_PTR))
+ {
+ warning (_("internal error: unbounded "
+ "array structure is unknown"));
+ return evaluate_subexp_standard (expect_type, exp, pos, noside);
+ }
/* i18n: Do not translate the "_m2_contents" part! */
arg1 = value_struct_elt (&temp, NULL, "_m2_contents", NULL,
_("unbounded structure "
if (value_type (arg1) != type)
arg1 = value_cast (type, arg1);
- type = check_typedef (value_type (arg1));
- return value_ind (value_ptradd (arg1, arg2));
+ check_typedef (value_type (arg1));
+ return value_ind (value_ptradd (arg1, value_as_long (arg2)));
}
else
- if (TYPE_CODE (type) != TYPE_CODE_ARRAY)
+ if (type->code () != TYPE_CODE_ARRAY)
{
- if (TYPE_NAME (type))
+ if (type->name ())
error (_("cannot subscript something of type `%s'"),
- TYPE_NAME (type));
+ type->name ());
else
error (_("cannot subscript requested type"));
}
if (noside == EVAL_AVOID_SIDE_EFFECTS)
return value_zero (TYPE_TARGET_TYPE (type), VALUE_LVAL (arg1));
else
- return value_subscript (arg1, arg2);
+ return value_subscript (arg1, value_as_long (arg2));
default:
return evaluate_subexp_standard (expect_type, exp, pos, noside);
}
nosideret:
- return value_from_longest (builtin_type_int8, (LONGEST) 1);
+ return value_from_longest (builtin_type (exp->gdbarch)->builtin_int, 1);
}
\f
{"MIN", UNOP_MIN, PREC_BUILTIN_FUNCTION, 0},
{"ODD", UNOP_ODD, PREC_BUILTIN_FUNCTION, 0},
{"TRUNC", UNOP_TRUNC, PREC_BUILTIN_FUNCTION, 0},
- {NULL, 0, 0, 0}
+ {NULL, OP_NULL, PREC_BUILTIN_FUNCTION, 0}
};
\f
/* The built-in types of Modula-2. */
nr_m2_primitive_types
};
-static void
-m2_language_arch_info (struct gdbarch *gdbarch,
- struct language_arch_info *lai)
-{
- const struct builtin_m2_type *builtin = builtin_m2_type (gdbarch);
-
- lai->string_char_type = builtin->builtin_char;
- lai->primitive_type_vector
- = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_m2_primitive_types + 1,
- struct type *);
-
- lai->primitive_type_vector [m2_primitive_type_char]
- = builtin->builtin_char;
- lai->primitive_type_vector [m2_primitive_type_int]
- = builtin->builtin_int;
- lai->primitive_type_vector [m2_primitive_type_card]
- = builtin->builtin_card;
- lai->primitive_type_vector [m2_primitive_type_real]
- = builtin->builtin_real;
- lai->primitive_type_vector [m2_primitive_type_bool]
- = builtin->builtin_bool;
-
- lai->bool_type_symbol = "BOOLEAN";
- lai->bool_type_default = builtin->builtin_bool;
-}
-
const struct exp_descriptor exp_descriptor_modula2 =
{
print_subexp_standard,
operator_length_standard,
+ operator_check_standard,
op_name_standard,
dump_subexp_body_standard,
evaluate_subexp_modula2
};
-const struct language_defn m2_language_defn =
+/* Constant data describing the M2 language. */
+
+extern const struct language_data m2_language_data =
{
"modula-2",
+ "Modula-2",
language_m2,
range_check_on,
- type_check_on,
case_sensitive_on,
array_row_major,
+ macro_expansion_no,
+ NULL,
&exp_descriptor_modula2,
- m2_parse, /* parser */
- m2_error, /* parser error function */
- null_post_parser,
- m2_printchar, /* Print character constant */
- m2_printstr, /* function to print string constant */
- m2_emit_char, /* Function to print a single character */
- m2_print_type, /* Print a type using appropriate syntax */
- m2_val_print, /* Print a value using appropriate syntax */
- c_value_print, /* Print a top-level value */
- NULL, /* Language specific skip_trampoline */
NULL, /* name_of_this */
- basic_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 */
+ false, /* la_store_sym_names_in_linkage_form_p */
m2_op_print_tab, /* expression operators for printing */
0, /* arrays are first-class (not c-style) */
0, /* String lower bound */
- default_word_break_characters,
- default_make_symbol_completion_list,
- m2_language_arch_info,
- default_print_array_index,
- default_pass_by_reference,
- LANG_MAGIC
+ &default_varobj_ops,
+ "{...}" /* la_struct_too_deep_ellipsis */
};
+/* Class representing the M2 language. */
+
+class m2_language : public language_defn
+{
+public:
+ m2_language ()
+ : language_defn (language_m2, m2_language_data)
+ { /* Nothing. */ }
+
+ /* See language.h. */
+ void language_arch_info (struct gdbarch *gdbarch,
+ struct language_arch_info *lai) const override
+ {
+ const struct builtin_m2_type *builtin = builtin_m2_type (gdbarch);
+
+ lai->string_char_type = builtin->builtin_char;
+ lai->primitive_type_vector
+ = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_m2_primitive_types + 1,
+ struct type *);
+
+ lai->primitive_type_vector [m2_primitive_type_char]
+ = builtin->builtin_char;
+ lai->primitive_type_vector [m2_primitive_type_int]
+ = builtin->builtin_int;
+ lai->primitive_type_vector [m2_primitive_type_card]
+ = builtin->builtin_card;
+ lai->primitive_type_vector [m2_primitive_type_real]
+ = builtin->builtin_real;
+ lai->primitive_type_vector [m2_primitive_type_bool]
+ = builtin->builtin_bool;
+
+ lai->bool_type_symbol = "BOOLEAN";
+ lai->bool_type_default = builtin->builtin_bool;
+ }
+
+ /* See language.h. */
+
+ void print_type (struct type *type, const char *varstring,
+ struct ui_file *stream, int show, int level,
+ const struct type_print_options *flags) const override
+ {
+ m2_print_type (type, varstring, stream, show, level, flags);
+ }
+
+ /* See language.h. */
+
+ void value_print_inner
+ (struct value *val, struct ui_file *stream, int recurse,
+ const struct value_print_options *options) const override
+ {
+ return m2_value_print_inner (val, stream, recurse, options);
+ }
+
+ /* See language.h. */
+
+ int parser (struct parser_state *ps) const override
+ {
+ return m2_parse (ps);
+ }
+
+ /* See language.h. */
+
+ void emitchar (int ch, struct type *chtype,
+ struct ui_file *stream, int quoter) const override
+ {
+ ch &= 0xFF; /* Avoid sign bit follies. */
+
+ if (PRINT_LITERAL_FORM (ch))
+ {
+ if (ch == '\\' || ch == quoter)
+ fputs_filtered ("\\", stream);
+ fprintf_filtered (stream, "%c", ch);
+ }
+ else
+ {
+ switch (ch)
+ {
+ case '\n':
+ fputs_filtered ("\\n", stream);
+ break;
+ case '\b':
+ fputs_filtered ("\\b", stream);
+ break;
+ case '\t':
+ fputs_filtered ("\\t", stream);
+ break;
+ case '\f':
+ fputs_filtered ("\\f", stream);
+ break;
+ case '\r':
+ fputs_filtered ("\\r", stream);
+ break;
+ case '\033':
+ fputs_filtered ("\\e", stream);
+ break;
+ case '\007':
+ fputs_filtered ("\\a", stream);
+ break;
+ default:
+ fprintf_filtered (stream, "\\%.3o", (unsigned int) ch);
+ break;
+ }
+ }
+ }
+
+ /* See language.h. */
+
+ void printchar (int ch, struct type *chtype,
+ struct ui_file *stream) const override
+ {
+ m2_printchar (ch, chtype, stream);
+ }
+
+ /* See language.h. */
+
+ void printstr (struct ui_file *stream, struct type *elttype,
+ const gdb_byte *string, unsigned int length,
+ const char *encoding, int force_ellipses,
+ const struct value_print_options *options) const override
+ {
+ unsigned int i;
+ unsigned int things_printed = 0;
+ int in_quotes = 0;
+ int need_comma = 0;
+
+ if (length == 0)
+ {
+ fputs_filtered ("\"\"", gdb_stdout);
+ return;
+ }
+
+ for (i = 0; i < length && things_printed < options->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_comma)
+ {
+ fputs_filtered (", ", stream);
+ need_comma = 0;
+ }
+
+ rep1 = i + 1;
+ reps = 1;
+ while (rep1 < length && string[rep1] == string[i])
+ {
+ ++rep1;
+ ++reps;
+ }
+
+ if (reps > options->repeat_count_threshold)
+ {
+ if (in_quotes)
+ {
+ fputs_filtered ("\", ", stream);
+ in_quotes = 0;
+ }
+ m2_printchar (string[i], elttype, stream);
+ fprintf_filtered (stream, " <repeats %u times>", reps);
+ i = rep1 - 1;
+ things_printed += options->repeat_count_threshold;
+ need_comma = 1;
+ }
+ else
+ {
+ if (!in_quotes)
+ {
+ fputs_filtered ("\"", stream);
+ in_quotes = 1;
+ }
+ LA_EMIT_CHAR (string[i], elttype, stream, '"');
+ ++things_printed;
+ }
+ }
+
+ /* Terminate the quotes if necessary. */
+ if (in_quotes)
+ fputs_filtered ("\"", stream);
+
+ if (force_ellipses || i < length)
+ fputs_filtered ("...", stream);
+ }
+
+ /* See language.h. */
+
+ void print_typedef (struct type *type, struct symbol *new_symbol,
+ struct ui_file *stream) const override
+ {
+ m2_print_typedef (type, new_symbol, stream);
+ }
+
+ /* See language.h. */
+
+ bool is_string_type_p (struct type *type) const override
+ {
+ type = check_typedef (type);
+ if (type->code () == TYPE_CODE_ARRAY
+ && TYPE_LENGTH (type) > 0
+ && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
+ {
+ struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
+
+ if (TYPE_LENGTH (elttype) == 1
+ && (elttype->code () == TYPE_CODE_INT
+ || elttype->code () == TYPE_CODE_CHAR))
+ return true;
+ }
+
+ return false;
+ }
+};
+
+/* Single instance of the M2 language. */
+
+static m2_language m2_language_defn;
+
static void *
build_m2_types (struct gdbarch *gdbarch)
{
= GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_m2_type);
/* Modula-2 "pervasive" types. NOTE: these can be redefined!!! */
- builtin_m2_type->builtin_int =
- init_type (TYPE_CODE_INT,
- gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
- 0, "INTEGER", (struct objfile *) NULL);
- builtin_m2_type->builtin_card =
- init_type (TYPE_CODE_INT,
- gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
- TYPE_FLAG_UNSIGNED,
- "CARDINAL", (struct objfile *) NULL);
- builtin_m2_type->builtin_real =
- init_type (TYPE_CODE_FLT,
- gdbarch_float_bit (gdbarch) / TARGET_CHAR_BIT,
- 0,
- "REAL", (struct objfile *) NULL);
- builtin_m2_type->builtin_char =
- init_type (TYPE_CODE_CHAR, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
- TYPE_FLAG_UNSIGNED,
- "CHAR", (struct objfile *) NULL);
- builtin_m2_type->builtin_bool =
- init_type (TYPE_CODE_BOOL,
- gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT,
- TYPE_FLAG_UNSIGNED,
- "BOOLEAN", (struct objfile *) NULL);
+ builtin_m2_type->builtin_int
+ = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 0, "INTEGER");
+ builtin_m2_type->builtin_card
+ = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 1, "CARDINAL");
+ builtin_m2_type->builtin_real
+ = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch), "REAL",
+ gdbarch_float_format (gdbarch));
+ builtin_m2_type->builtin_char
+ = arch_character_type (gdbarch, TARGET_CHAR_BIT, 1, "CHAR");
+ builtin_m2_type->builtin_bool
+ = arch_boolean_type (gdbarch, gdbarch_int_bit (gdbarch), 1, "BOOLEAN");
return builtin_m2_type;
}
const struct builtin_m2_type *
builtin_m2_type (struct gdbarch *gdbarch)
{
- return gdbarch_data (gdbarch, m2_type_data);
+ return (const struct builtin_m2_type *) gdbarch_data (gdbarch, m2_type_data);
}
/* Initialization for Modula-2 */
+void _initialize_m2_language ();
void
-_initialize_m2_language (void)
+_initialize_m2_language ()
{
m2_type_data = gdbarch_data_register_post_init (build_m2_types);
-
- add_language (&m2_language_defn);
}
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