binutils-gdb/gdb/p-lang.c

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/* Pascal language support routines for GDB, the GNU debugger.
Copyright (C) 2000, 2002, 2003, 2004, 2005, 2007, 2008
2007-01-09 18:59:20 +01:00
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 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/>. */
/* This file is derived from c-lang.c */
#include "defs.h"
#include "gdb_string.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "parser-defs.h"
#include "language.h"
#include "p-lang.h"
#include "valprint.h"
#include "value.h"
#include <ctype.h>
extern void _initialize_pascal_language (void);
/* All GPC versions until now (2007-09-27) also define a symbol called
'_p_initialize'. Check for the presence of this symbol first. */
static const char GPC_P_INITIALIZE[] = "_p_initialize";
/* The name of the symbol that GPC uses as the name of the main
procedure (since version 20050212). */
static const char GPC_MAIN_PROGRAM_NAME_1[] = "_p__M0_main_program";
/* Older versions of GPC (versions older than 20050212) were using
a different name for the main procedure. */
static const char GPC_MAIN_PROGRAM_NAME_2[] = "pascal_main_program";
/* Function returning the special symbol name used
by GPC for the main procedure in the main program
if it is found in minimal symbol list.
This function tries to find minimal symbols generated by GPC
so that it finds the even if the program was compiled
without debugging information.
According to information supplied by Waldeck Hebisch,
this should work for all versions posterior to June 2000. */
const char *
pascal_main_name (void)
{
struct minimal_symbol *msym;
msym = lookup_minimal_symbol (GPC_P_INITIALIZE, NULL, NULL);
/* If '_p_initialize' was not found, the main program is likely not
written in Pascal. */
if (msym == NULL)
return NULL;
msym = lookup_minimal_symbol (GPC_MAIN_PROGRAM_NAME_1, NULL, NULL);
if (msym != NULL)
{
return GPC_MAIN_PROGRAM_NAME_1;
}
msym = lookup_minimal_symbol (GPC_MAIN_PROGRAM_NAME_2, NULL, NULL);
if (msym != NULL)
{
return GPC_MAIN_PROGRAM_NAME_2;
}
/* No known entry procedure found, the main program is probably
not compiled with GPC. */
return NULL;
}
/* Determines if type TYPE is a pascal string type.
Returns 1 if the type is a known pascal type
This function is used by p-valprint.c code to allow better string display.
If it is a pascal string type, then it also sets info needed
to get the length and the data of the string
length_pos, length_size and string_pos are given in bytes.
char_size gives the element size in bytes.
FIXME: if the position or the size of these fields
are not multiple of TARGET_CHAR_BIT then the results are wrong
but this does not happen for Free Pascal nor for GPC. */
int
is_pascal_string_type (struct type *type,int *length_pos,
int *length_size, int *string_pos, int *char_size,
char **arrayname)
{
if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
{
/* Old Borland type pascal strings from Free Pascal Compiler. */
/* Two fields: length and st. */
if (TYPE_NFIELDS (type) == 2
&& strcmp (TYPE_FIELDS (type)[0].name, "length") == 0
&& strcmp (TYPE_FIELDS (type)[1].name, "st") == 0)
{
if (length_pos)
*length_pos = TYPE_FIELD_BITPOS (type, 0) / TARGET_CHAR_BIT;
if (length_size)
*length_size = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0));
if (string_pos)
*string_pos = TYPE_FIELD_BITPOS (type, 1) / TARGET_CHAR_BIT;
if (char_size)
*char_size = 1;
if (arrayname)
*arrayname = TYPE_FIELDS (type)[1].name;
return 2;
};
/* GNU pascal strings. */
/* Three fields: Capacity, length and schema$ or _p_schema. */
if (TYPE_NFIELDS (type) == 3
&& strcmp (TYPE_FIELDS (type)[0].name, "Capacity") == 0
&& strcmp (TYPE_FIELDS (type)[1].name, "length") == 0)
{
if (length_pos)
*length_pos = TYPE_FIELD_BITPOS (type, 1) / TARGET_CHAR_BIT;
if (length_size)
*length_size = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 1));
if (string_pos)
*string_pos = TYPE_FIELD_BITPOS (type, 2) / TARGET_CHAR_BIT;
/* FIXME: how can I detect wide chars in GPC ?? */
if (char_size)
*char_size = 1;
if (arrayname)
*arrayname = TYPE_FIELDS (type)[2].name;
return 3;
};
}
return 0;
}
static void pascal_one_char (int, struct ui_file *, int *);
/* Print the character C on STREAM as part of the contents of a literal
string.
In_quotes is reset to 0 if a char is written with #4 notation */
static void
pascal_one_char (int c, struct ui_file *stream, int *in_quotes)
{
c &= 0xFF; /* Avoid sign bit follies */
if ((c == '\'') || (PRINT_LITERAL_FORM (c)))
{
if (!(*in_quotes))
fputs_filtered ("'", stream);
*in_quotes = 1;
if (c == '\'')
{
fputs_filtered ("''", stream);
}
else
fprintf_filtered (stream, "%c", c);
}
else
{
if (*in_quotes)
fputs_filtered ("'", stream);
*in_quotes = 0;
fprintf_filtered (stream, "#%d", (unsigned int) c);
}
}
static void pascal_emit_char (int c, struct ui_file *stream, int quoter);
/* 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. */
static void
pascal_emit_char (int c, struct ui_file *stream, int quoter)
{
int in_quotes = 0;
pascal_one_char (c, stream, &in_quotes);
if (in_quotes)
fputs_filtered ("'", stream);
}
void
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pascal_printchar (int c, struct ui_file *stream)
{
int in_quotes = 0;
pascal_one_char (c, stream, &in_quotes);
if (in_quotes)
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. */
void
pascal_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 the string was not truncated due to `set print elements', and
the last byte of it is a null, we don't print that, in traditional C
style. */
if ((!force_ellipses) && length > 0 && string[length - 1] == '\0')
length--;
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_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;
}
pascal_printchar (string[i], stream);
fprintf_filtered (stream, " <repeats %u times>", reps);
i = rep1 - 1;
things_printed += repeat_count_threshold;
need_comma = 1;
}
else
{
int c = string[i];
if ((!in_quotes) && (PRINT_LITERAL_FORM (c)))
{
if (inspect_it)
fputs_filtered ("\\'", stream);
else
fputs_filtered ("'", stream);
in_quotes = 1;
}
pascal_one_char (c, stream, &in_quotes);
++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);
}
/* Table mapping opcodes into strings for printing operators
and precedences of the operators. */
const struct op_print pascal_op_print_tab[] =
{
{",", BINOP_COMMA, PREC_COMMA, 0},
{":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
{"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
{"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
{"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
{"=", 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},
{"shr", BINOP_RSH, PREC_SHIFT, 0},
{"shl", BINOP_LSH, PREC_SHIFT, 0},
{"+", BINOP_ADD, PREC_ADD, 0},
{"-", BINOP_SUB, PREC_ADD, 0},
{"*", BINOP_MUL, PREC_MUL, 0},
{"/", BINOP_DIV, PREC_MUL, 0},
{"div", BINOP_INTDIV, PREC_MUL, 0},
{"mod", BINOP_REM, PREC_MUL, 0},
{"@", BINOP_REPEAT, PREC_REPEAT, 0},
{"-", UNOP_NEG, PREC_PREFIX, 0},
{"not", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
{"^", UNOP_IND, PREC_SUFFIX, 1},
{"@", UNOP_ADDR, PREC_PREFIX, 0},
{"sizeof", UNOP_SIZEOF, PREC_PREFIX, 0},
{NULL, 0, 0, 0}
};
enum pascal_primitive_types {
pascal_primitive_type_int,
pascal_primitive_type_long,
pascal_primitive_type_short,
pascal_primitive_type_char,
pascal_primitive_type_float,
pascal_primitive_type_double,
pascal_primitive_type_void,
pascal_primitive_type_long_long,
pascal_primitive_type_signed_char,
pascal_primitive_type_unsigned_char,
pascal_primitive_type_unsigned_short,
pascal_primitive_type_unsigned_int,
pascal_primitive_type_unsigned_long,
pascal_primitive_type_unsigned_long_long,
pascal_primitive_type_long_double,
pascal_primitive_type_complex,
pascal_primitive_type_double_complex,
nr_pascal_primitive_types
};
static void
pascal_language_arch_info (struct gdbarch *gdbarch,
struct language_arch_info *lai)
{
const struct builtin_type *builtin = builtin_type (gdbarch);
lai->string_char_type = builtin->builtin_char;
lai->primitive_type_vector
= GDBARCH_OBSTACK_CALLOC (gdbarch, nr_pascal_primitive_types + 1,
struct type *);
lai->primitive_type_vector [pascal_primitive_type_int]
= builtin->builtin_int;
lai->primitive_type_vector [pascal_primitive_type_long]
= builtin->builtin_long;
lai->primitive_type_vector [pascal_primitive_type_short]
= builtin->builtin_short;
lai->primitive_type_vector [pascal_primitive_type_char]
= builtin->builtin_char;
lai->primitive_type_vector [pascal_primitive_type_float]
= builtin->builtin_float;
lai->primitive_type_vector [pascal_primitive_type_double]
= builtin->builtin_double;
lai->primitive_type_vector [pascal_primitive_type_void]
= builtin->builtin_void;
lai->primitive_type_vector [pascal_primitive_type_long_long]
= builtin->builtin_long_long;
lai->primitive_type_vector [pascal_primitive_type_signed_char]
= builtin->builtin_signed_char;
lai->primitive_type_vector [pascal_primitive_type_unsigned_char]
= builtin->builtin_unsigned_char;
lai->primitive_type_vector [pascal_primitive_type_unsigned_short]
= builtin->builtin_unsigned_short;
lai->primitive_type_vector [pascal_primitive_type_unsigned_int]
= builtin->builtin_unsigned_int;
lai->primitive_type_vector [pascal_primitive_type_unsigned_long]
= builtin->builtin_unsigned_long;
lai->primitive_type_vector [pascal_primitive_type_unsigned_long_long]
= builtin->builtin_unsigned_long_long;
lai->primitive_type_vector [pascal_primitive_type_long_double]
= builtin->builtin_long_double;
lai->primitive_type_vector [pascal_primitive_type_complex]
= builtin->builtin_complex;
lai->primitive_type_vector [pascal_primitive_type_double_complex]
= builtin->builtin_double_complex;
}
const struct language_defn pascal_language_defn =
{
"pascal", /* Language name */
language_pascal,
range_check_on,
type_check_on,
case_sensitive_on,
array_row_major,
* parser-defs.h (struct exp_descriptor): New definition, containing language-specific info for printing, prefixifying, dumping, and evaluating expressions. (exp_descriptor_standard): Declare new variable. (print_subexp): Make global and declare here (from expprint.c). (dump_subexp): Ditto. (dump_subexp_body_standard): Declare. (operator_length_standard): Declare. (op_name_standard): Declare. (print_subexp): Declare. (print_subexp_standard): Declare. * language.h (struct language_defn): Add la_exp_desc field to hold pointer to table for language-specific operators. Remove evaluate_exp field, which is now in struct exp_descriptor. * parse.c (operator_length): Move most code to new operator_length_standard function. Use language-specific information. (operator_length_standard): New function taking most code from operator_length. (exp_descriptor_standard): New constant. * expression.h (enum exp_opcode): Add definitions of OP_EXTENDED0 and OP_EXTENDED_LAST. * expprint.c (print_subexp): Use language-specific print_subexp. Make global; remove static declaration. Move most code to print_subexp_standard. (print_subexp_standard): New function, containing code formerly in print_subexp. (op_name): Add expression to argument signature. Use langauge-specific op_name. Move most code to op_name_standard. (op_name_standard): New function, containing code formerly in op_name. (dump_subexp): Use new version of op_name function. Use language-specific dump_subexp_body, and move most existing code to dump_subexp_body_standard. (dump_raw_expression): Use new op_name interface. (dump_subexp_body): Move most code to dump_subexp_body_standard. (dump_subexp_body_standard): New function, containing code formerly in dump_subexp_body. * language.c (unknown_language): Add default la_exp_desc field and remove evaluate_exp field. (auto_language): Ditto. (local_language): Ditto. * f-lang.c (f_language_defn): Ditto. * c-lang.c (c_language_defn): Ditto. (cplus_language_defn): Ditto. (asm_language_defn): Ditto. (minimal_language_defn): Ditto. * p-lang.c (pascal_language_defn): Ditto. * m2-lang.c (m2_language_defn): Ditto. * objc-lang.c (objc_language_defn): Ditto. * jv-lang.c (exp_descriptor_java): New variable, containing Java-specific expression evaluator. (java_language_defn): Add la_exp_desc field and remove evaluate_exp field. * scm-lang.c (exp_descriptor_scm): New variable, containing Scheme-specific expression evaluator. (scm_language_defn): Add la_exp_desc field and remove evaluate_exp field. * objc-lang.c (print_object_command): Take evaluate_exp from the la_exp_desc field. * Makefile.in (eval.o): Add dependency on parser-defs.h. * eval.c: Include parser-defs.h for the full declaration of la_exp_desc's type. (evaluate_subexp): Get evaluate_exp out of la_exp_desc field.
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&exp_descriptor_standard,
pascal_parse,
pascal_error,
null_post_parser,
pascal_printchar, /* Print a character constant */
pascal_printstr, /* Function to print string constant */
pascal_emit_char, /* Print a single char */
pascal_print_type, /* Print a type using appropriate syntax */
pascal_val_print, /* Print a value using appropriate syntax */
pascal_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
2004-01-23 David Carlton <carlton@kealia.com> Partial workaround for PR c++/1511: * cp-namespace.c: Include frame.h. (cp_lookup_transparent_type): New (cp_lookup_transparent_type_loop): New. * cp-support.h: Declare cp_lookup_transparent_type. * symtab.c (basic_lookup_transparent_type): Renamed from lookup_transparent_type. (lookup_transparent_type): Replace old body by a call to current_language->la_lookup_transparent_type. * symtab.h: Update copyright. Declare basic_lookup_transparent_type. * language.h: Update copyright. (struct language_defn): Add la_lookup_transparent_type. * language.c: Update copyright. (unknown_language_defn): Add basic_lookup_transparent_type. (auto_language_defn): Add basic_lookup_transparent_type. (local_language_defn): Add basic_lookup_transparent_type. * ada-lang.c: Update copyright. (ada_language_defn): Add basic_lookup_transparent_type. * c-lang.c: Update copyright. (c_language_defn): Add basic_lookup_transparent_type. (cplus_language_defn): Add basic_lookup_transparent_type. (asm_language_defn): Add basic_lookup_transparent_type. (minimal_language_defn): Add basic_lookup_transparent_type. * f-lang.c: Update copyright. (f_language_defn): Add basic_lookup_transparent_type. * jv-lang.c: Update copyright. (java_language_defn): Add basic_lookup_transparent_type. * m2-lang.c: Update copyright. (m2_language_defn): Add basic_lookup_transparent_type. * objc-lang.c: Update copyright. (objc_language_defn): Add basic_lookup_transparent_type. * p-lang.c: Update copyright. (p_language_defn): Add basic_lookup_transparent_type. * scm-lang.c: Update copyright. (scm_language_defn): Add basic_lookup_transparent_type. * Makefile.in (cp-namespace.o): Depend on frame.h. 2004-01-23 David Carlton <carlton@kealia.com> * gdb.cp/rtti.exp: Don't include full path in ${srcfile}. Add test for cp_lookup_transparent_type. * gdb.cp/rtti1.cc: Update copyright. Add n2::func and refer_to; call them.
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basic_lookup_transparent_type,/* lookup_transparent_type */
NULL, /* Language specific symbol demangler */
NULL, /* Language specific class_name_from_physname */
pascal_op_print_tab, /* expression operators for printing */
1, /* c-style arrays */
0, /* String lower bound */
default_word_break_characters,
pascal_language_arch_info,
2005-10-03 Joel Brobecker <brobecker@adacore.com> * language.h (language_defn): New field la_print_array_index. (LA_PRINT_ARRAY_INDEX): New macro. (default_print_array_index): Add declaration. * language.c (default_print_array_index): new function. (unknown_language): Add value for new field. (auto_language): Likewise. (local_language): Likewise. * ada-lang.c (ada_print_array_index): New function. (ada_language_defn): Add value for new field. * c-lang.c (c_language_defn): Likewise. (cpluc_language_defn): Likewise. (asm_language_defn): Likewise. (minimal_language_defn): Likewise. * f-lang.c (f_language_defn): Likewise. * jv-lang.c (java_language_defn): Likewise. * m2-lang.c (m2_language_defn): Likewise. * objc-lang.c (objc_language_defn): Likewise. * p-lang.c (pascal_language_defn): Likewise. * scm-lang.c (scm_language_defn): Likewise. * valprint.h (print_array_indexes_p): Add declaration. (get_array_low_bound): Add declaration. (maybe_print_array_index): Add declaration. * valprint.c (print_array_indexes): New static variable. (show_print_array_indexes): New function. (print_array_indexes_p): New function. (get_array_low_bound): New function. (maybe_print_array_index): New function. (val_print_array_elements): Print the index of each element if requested by the user. (_initialize_valprint): Add new array-indexes "set/show print" command. * ada-valprint.c (print_optional_low_bound): Replace extracted code by call to ada_get_array_low_bound_and_type(). Stop printing the low bound if indexes will be printed for all elements of the array. (val_print_packed_array_elements): Print the index of each element of the array if necessary.
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default_print_array_index,
default_pass_by_reference,
LANG_MAGIC
};
void
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_initialize_pascal_language (void)
{
add_language (&pascal_language_defn);
}