binutils-gdb/gdb/c-lang.c

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/* C language support routines for GDB, the GNU debugger.
Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002
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Free Software Foundation, Inc.
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This file is part of GDB.
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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.
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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.
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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 "expression.h"
#include "parser-defs.h"
#include "language.h"
#include "c-lang.h"
#include "valprint.h"
#include "macroscope.h"
#include "gdb_assert.h"
#include "charset.h"
#include "gdb_string.h"
#include "demangle.h"
#include "cp-support.h"
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extern void _initialize_c_language (void);
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static void c_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
c_emit_char (int c, struct ui_file *stream, int quoter)
{
const char *escape;
int host_char;
c &= 0xFF; /* Avoid sign bit follies */
escape = c_target_char_has_backslash_escape (c);
if (escape)
{
if (quoter == '"' && strcmp (escape, "0") == 0)
/* Print nulls embedded in double quoted strings as \000 to
prevent ambiguity. */
fprintf_filtered (stream, "\\000");
else
fprintf_filtered (stream, "\\%s", escape);
}
else if (target_char_to_host (c, &host_char)
&& host_char_print_literally (host_char))
{
if (host_char == '\\' || host_char == quoter)
fputs_filtered ("\\", stream);
fprintf_filtered (stream, "%c", host_char);
}
else
fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
}
void
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c_printchar (int c, struct ui_file *stream)
{
fputc_filtered ('\'', stream);
LA_EMIT_CHAR (c, stream, '\'');
fputc_filtered ('\'', stream);
}
/* Print the character string STRING, printing at most LENGTH characters.
LENGTH is -1 if the string is nul terminated. Each character is WIDTH bytes
long. 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
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c_printstr (struct ui_file *stream, char *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
&& (extract_unsigned_integer (string + (length - 1) * width, width)
== '\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
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to see whether it is repeated. */
unsigned int rep1;
/* Number of repetitions we have detected so far. */
unsigned int reps;
unsigned long current_char;
QUIT;
if (need_comma)
{
fputs_filtered (", ", stream);
need_comma = 0;
}
current_char = extract_unsigned_integer (string + i * width, width);
rep1 = i + 1;
reps = 1;
while (rep1 < length
&& extract_unsigned_integer (string + rep1 * width, width)
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== current_char)
{
++rep1;
++reps;
}
if (reps > repeat_count_threshold)
{
if (in_quotes)
{
if (inspect_it)
fputs_filtered ("\\\", ", stream);
else
fputs_filtered ("\", ", stream);
in_quotes = 0;
}
LA_PRINT_CHAR (current_char, 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 (current_char, 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);
}
/* Create a fundamental C type using default reasonable for the current
target machine.
Some object/debugging file formats (DWARF version 1, COFF, etc) do not
define fundamental types such as "int" or "double". Others (stabs or
DWARF version 2, etc) do define fundamental types. For the formats which
don't provide fundamental types, gdb can create such types using this
function.
FIXME: Some compilers distinguish explicitly signed integral types
(signed short, signed int, signed long) from "regular" integral types
(short, int, long) in the debugging information. There is some dis-
agreement as to how useful this feature is. In particular, gcc does
not support this. Also, only some debugging formats allow the
distinction to be passed on to a debugger. For now, we always just
use "short", "int", or "long" as the type name, for both the implicit
and explicitly signed types. This also makes life easier for the
gdb test suite since we don't have to account for the differences
in output depending upon what the compiler and debugging format
support. We will probably have to re-examine the issue when gdb
starts taking it's fundamental type information directly from the
debugging information supplied by the compiler. fnf@cygnus.com */
struct type *
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c_create_fundamental_type (struct objfile *objfile, int typeid)
{
struct type *type = NULL;
switch (typeid)
{
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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,
TARGET_INT_BIT / TARGET_CHAR_BIT,
0, "<?type?>", objfile);
warning ("internal error: no C/C++ fundamental type %d", typeid);
break;
case FT_VOID:
type = init_type (TYPE_CODE_VOID,
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
0, "void", objfile);
break;
case FT_BOOLEAN:
type = init_type (TYPE_CODE_BOOL,
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
0, "bool", objfile);
break;
case FT_CHAR:
type = init_type (TYPE_CODE_INT,
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_NOSIGN, "char", objfile);
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break;
case FT_SIGNED_CHAR:
type = init_type (TYPE_CODE_INT,
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
0, "signed char", objfile);
break;
case FT_UNSIGNED_CHAR:
type = init_type (TYPE_CODE_INT,
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED, "unsigned char", objfile);
break;
case FT_SHORT:
type = init_type (TYPE_CODE_INT,
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
0, "short", objfile);
break;
case FT_SIGNED_SHORT:
type = init_type (TYPE_CODE_INT,
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
0, "short", objfile); /* FIXME-fnf */
break;
case FT_UNSIGNED_SHORT:
type = init_type (TYPE_CODE_INT,
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
break;
case FT_INTEGER:
type = init_type (TYPE_CODE_INT,
TARGET_INT_BIT / TARGET_CHAR_BIT,
0, "int", objfile);
break;
case FT_SIGNED_INTEGER:
type = init_type (TYPE_CODE_INT,
TARGET_INT_BIT / TARGET_CHAR_BIT,
0, "int", objfile); /* FIXME -fnf */
break;
case FT_UNSIGNED_INTEGER:
type = init_type (TYPE_CODE_INT,
TARGET_INT_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED, "unsigned int", objfile);
break;
case FT_LONG:
type = init_type (TYPE_CODE_INT,
TARGET_LONG_BIT / TARGET_CHAR_BIT,
0, "long", objfile);
break;
case FT_SIGNED_LONG:
type = init_type (TYPE_CODE_INT,
TARGET_LONG_BIT / TARGET_CHAR_BIT,
0, "long", objfile); /* FIXME -fnf */
break;
case FT_UNSIGNED_LONG:
type = init_type (TYPE_CODE_INT,
TARGET_LONG_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
break;
case FT_LONG_LONG:
type = init_type (TYPE_CODE_INT,
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
0, "long long", objfile);
break;
case FT_SIGNED_LONG_LONG:
type = init_type (TYPE_CODE_INT,
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
0, "signed long long", objfile);
break;
case FT_UNSIGNED_LONG_LONG:
type = init_type (TYPE_CODE_INT,
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
break;
case FT_FLOAT:
type = init_type (TYPE_CODE_FLT,
TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
0, "float", objfile);
break;
case FT_DBL_PREC_FLOAT:
type = init_type (TYPE_CODE_FLT,
TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
0, "double", objfile);
break;
case FT_EXT_PREC_FLOAT:
type = init_type (TYPE_CODE_FLT,
TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
0, "long double", objfile);
break;
case FT_COMPLEX:
type = init_type (TYPE_CODE_FLT,
2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
0, "complex float", objfile);
TYPE_TARGET_TYPE (type)
= init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
0, "float", objfile);
break;
case FT_DBL_PREC_COMPLEX:
type = init_type (TYPE_CODE_FLT,
2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
0, "complex double", objfile);
TYPE_TARGET_TYPE (type)
= init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
0, "double", objfile);
break;
case FT_EXT_PREC_COMPLEX:
type = init_type (TYPE_CODE_FLT,
2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
0, "complex long double", objfile);
TYPE_TARGET_TYPE (type)
= init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
0, "long double", objfile);
break;
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case FT_TEMPLATE_ARG:
type = init_type (TYPE_CODE_TEMPLATE_ARG,
0,
0, "<template arg>", objfile);
break;
}
return (type);
}
/* Preprocessing and parsing C and C++ expressions. */
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/* When we find that lexptr (the global var defined in parse.c) is
pointing at a macro invocation, we expand the invocation, and call
scan_macro_expansion to save the old lexptr here and point lexptr
into the expanded text. When we reach the end of that, we call
end_macro_expansion to pop back to the value we saved here. The
macro expansion code promises to return only fully-expanded text,
so we don't need to "push" more than one level.
This is disgusting, of course. It would be cleaner to do all macro
expansion beforehand, and then hand that to lexptr. But we don't
really know where the expression ends. Remember, in a command like
(gdb) break *ADDRESS if CONDITION
we evaluate ADDRESS in the scope of the current frame, but we
evaluate CONDITION in the scope of the breakpoint's location. So
it's simply wrong to try to macro-expand the whole thing at once. */
static char *macro_original_text;
static char *macro_expanded_text;
void
scan_macro_expansion (char *expansion)
{
/* We'd better not be trying to push the stack twice. */
gdb_assert (! macro_original_text);
gdb_assert (! macro_expanded_text);
/* Save the old lexptr value, so we can return to it when we're done
parsing the expanded text. */
macro_original_text = lexptr;
lexptr = expansion;
/* Save the expanded text, so we can free it when we're finished. */
macro_expanded_text = expansion;
}
int
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scanning_macro_expansion (void)
{
return macro_original_text != 0;
}
void
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finished_macro_expansion (void)
{
/* There'd better be something to pop back to, and we better have
saved a pointer to the start of the expanded text. */
gdb_assert (macro_original_text);
gdb_assert (macro_expanded_text);
/* Pop back to the original text. */
lexptr = macro_original_text;
macro_original_text = 0;
/* Free the expanded text. */
xfree (macro_expanded_text);
macro_expanded_text = 0;
}
static void
scan_macro_cleanup (void *dummy)
{
if (macro_original_text)
finished_macro_expansion ();
}
/* We set these global variables before calling c_parse, to tell it
how it to find macro definitions for the expression at hand. */
macro_lookup_ftype *expression_macro_lookup_func;
void *expression_macro_lookup_baton;
static struct macro_definition *
null_macro_lookup (const char *name, void *baton)
{
return 0;
}
static int
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c_preprocess_and_parse (void)
{
/* Set up a lookup function for the macro expander. */
struct macro_scope *scope = 0;
struct cleanup *back_to = make_cleanup (free_current_contents, &scope);
if (expression_context_block)
scope = sal_macro_scope (find_pc_line (expression_context_pc, 0));
else
scope = default_macro_scope ();
if (scope)
{
expression_macro_lookup_func = standard_macro_lookup;
expression_macro_lookup_baton = (void *) scope;
}
else
{
expression_macro_lookup_func = null_macro_lookup;
expression_macro_lookup_baton = 0;
}
gdb_assert (! macro_original_text);
make_cleanup (scan_macro_cleanup, 0);
{
int result = c_parse ();
do_cleanups (back_to);
return result;
}
}
/* Table mapping opcodes into strings for printing operators
and precedences of the operators. */
const struct op_print c_op_print_tab[] =
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{
{",", BINOP_COMMA, PREC_COMMA, 0},
{"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
{"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
{"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
{"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
{"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
{"&", 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},
{">>", BINOP_RSH, PREC_SHIFT, 0},
{"<<", 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},
{"%", BINOP_REM, PREC_MUL, 0},
{"@", BINOP_REPEAT, PREC_REPEAT, 0},
{"-", UNOP_NEG, PREC_PREFIX, 0},
{"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
{"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
{"*", UNOP_IND, PREC_PREFIX, 0},
{"&", UNOP_ADDR, PREC_PREFIX, 0},
{"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
{"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
{"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
{NULL, 0, 0, 0}
};
struct type **const (c_builtin_types[]) =
{
&builtin_type_int,
&builtin_type_long,
&builtin_type_short,
&builtin_type_char,
&builtin_type_float,
&builtin_type_double,
&builtin_type_void,
&builtin_type_long_long,
&builtin_type_signed_char,
&builtin_type_unsigned_char,
&builtin_type_unsigned_short,
&builtin_type_unsigned_int,
&builtin_type_unsigned_long,
&builtin_type_unsigned_long_long,
&builtin_type_long_double,
&builtin_type_complex,
&builtin_type_double_complex,
0
};
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const struct language_defn c_language_defn =
{
"c", /* Language name */
language_c,
c_builtin_types,
range_check_off,
type_check_off,
case_sensitive_on,
* 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,
c_preprocess_and_parse,
c_error,
c_printchar, /* Print a character constant */
c_printstr, /* Function to print string constant */
c_emit_char, /* Print a single char */
c_create_fundamental_type, /* Create fundamental type in this language */
c_print_type, /* Print a type using appropriate syntax */
c_val_print, /* Print a value using appropriate syntax */
c_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
NULL, /* value_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
NULL, /* Language specific symbol demangler */
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{"", "", "", ""}, /* Binary format info */
{"0%lo", "0", "o", ""}, /* Octal format info */
{"%ld", "", "d", ""}, /* Decimal format info */
{"0x%lx", "0x", "x", ""}, /* Hex format info */
c_op_print_tab, /* expression operators for printing */
1, /* c-style arrays */
0, /* String lower bound */
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&builtin_type_char, /* Type of string elements */
default_word_break_characters,
LANG_MAGIC
};
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struct type **const (cplus_builtin_types[]) =
{
&builtin_type_int,
&builtin_type_long,
&builtin_type_short,
&builtin_type_char,
&builtin_type_float,
&builtin_type_double,
&builtin_type_void,
&builtin_type_long_long,
&builtin_type_signed_char,
&builtin_type_unsigned_char,
&builtin_type_unsigned_short,
&builtin_type_unsigned_int,
&builtin_type_unsigned_long,
&builtin_type_unsigned_long_long,
&builtin_type_long_double,
&builtin_type_complex,
&builtin_type_double_complex,
&builtin_type_bool,
0
};
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const struct language_defn cplus_language_defn =
{
"c++", /* Language name */
language_cplus,
cplus_builtin_types,
range_check_off,
type_check_off,
case_sensitive_on,
* 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,
c_preprocess_and_parse,
c_error,
c_printchar, /* Print a character constant */
c_printstr, /* Function to print string constant */
c_emit_char, /* Print a single char */
c_create_fundamental_type, /* Create fundamental type in this language */
c_print_type, /* Print a type using appropriate syntax */
c_val_print, /* Print a value using appropriate syntax */
c_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
cp_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
cplus_demangle, /* Language specific symbol demangler */
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{"", "", "", ""}, /* Binary format info */
{"0%lo", "0", "o", ""}, /* Octal format info */
{"%ld", "", "d", ""}, /* Decimal format info */
{"0x%lx", "0x", "x", ""}, /* Hex format info */
c_op_print_tab, /* expression operators for printing */
1, /* c-style arrays */
0, /* String lower bound */
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&builtin_type_char, /* Type of string elements */
default_word_break_characters,
LANG_MAGIC
};
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const struct language_defn asm_language_defn =
{
"asm", /* Language name */
language_asm,
c_builtin_types,
range_check_off,
type_check_off,
case_sensitive_on,
* 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,
c_preprocess_and_parse,
c_error,
c_printchar, /* Print a character constant */
c_printstr, /* Function to print string constant */
c_emit_char, /* Print a single char */
c_create_fundamental_type, /* Create fundamental type in this language */
c_print_type, /* Print a type using appropriate syntax */
c_val_print, /* Print a value using appropriate syntax */
c_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
NULL, /* value_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
NULL, /* Language specific symbol demangler */
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{"", "", "", ""}, /* Binary format info */
{"0%lo", "0", "o", ""}, /* Octal format info */
{"%ld", "", "d", ""}, /* Decimal format info */
{"0x%lx", "0x", "x", ""}, /* Hex format info */
c_op_print_tab, /* expression operators for printing */
1, /* c-style arrays */
0, /* String lower bound */
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&builtin_type_char, /* Type of string elements */
default_word_break_characters,
LANG_MAGIC
};
/* The following language_defn does not represent a real language.
It just provides a minimal support a-la-C that should allow users
to do some simple operations when debugging applications that use
a language currently not supported by GDB. */
const struct language_defn minimal_language_defn =
{
"minimal", /* Language name */
language_minimal,
c_builtin_types,
range_check_off,
type_check_off,
case_sensitive_on,
* 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,
c_preprocess_and_parse,
c_error,
c_printchar, /* Print a character constant */
c_printstr, /* Function to print string constant */
c_emit_char, /* Print a single char */
c_create_fundamental_type, /* Create fundamental type in this language */
c_print_type, /* Print a type using appropriate syntax */
c_val_print, /* Print a value using appropriate syntax */
c_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
NULL, /* value_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
NULL, /* Language specific symbol demangler */
{"", "", "", ""}, /* Binary format info */
{"0%lo", "0", "o", ""}, /* Octal format info */
{"%ld", "", "d", ""}, /* Decimal format info */
{"0x%lx", "0x", "x", ""}, /* Hex format info */
c_op_print_tab, /* expression operators for printing */
1, /* c-style arrays */
0, /* String lower bound */
&builtin_type_char, /* Type of string elements */
default_word_break_characters,
LANG_MAGIC
};
void
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_initialize_c_language (void)
{
add_language (&c_language_defn);
add_language (&cplus_language_defn);
add_language (&asm_language_defn);
add_language (&minimal_language_defn);
}