1075 lines
32 KiB
C
1075 lines
32 KiB
C
/* C language support routines for GDB, the GNU debugger.
|
||
|
||
Copyright (C) 1992-2013 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/>. */
|
||
|
||
#include "defs.h"
|
||
#include "symtab.h"
|
||
#include "gdbtypes.h"
|
||
#include "expression.h"
|
||
#include "parser-defs.h"
|
||
#include "language.h"
|
||
#include "varobj.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-abi.h"
|
||
#include "cp-support.h"
|
||
#include "gdb_obstack.h"
|
||
#include <ctype.h>
|
||
#include "exceptions.h"
|
||
#include "gdbcore.h"
|
||
|
||
extern void _initialize_c_language (void);
|
||
|
||
/* Given a C string type, STR_TYPE, return the corresponding target
|
||
character set name. */
|
||
|
||
static const char *
|
||
charset_for_string_type (enum c_string_type str_type,
|
||
struct gdbarch *gdbarch)
|
||
{
|
||
switch (str_type & ~C_CHAR)
|
||
{
|
||
case C_STRING:
|
||
return target_charset (gdbarch);
|
||
case C_WIDE_STRING:
|
||
return target_wide_charset (gdbarch);
|
||
case C_STRING_16:
|
||
/* FIXME: UTF-16 is not always correct. */
|
||
if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
|
||
return "UTF-16BE";
|
||
else
|
||
return "UTF-16LE";
|
||
case C_STRING_32:
|
||
/* FIXME: UTF-32 is not always correct. */
|
||
if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
|
||
return "UTF-32BE";
|
||
else
|
||
return "UTF-32LE";
|
||
}
|
||
internal_error (__FILE__, __LINE__, _("unhandled c_string_type"));
|
||
}
|
||
|
||
/* Classify ELTTYPE according to what kind of character it is. Return
|
||
the enum constant representing the character type. Also set
|
||
*ENCODING to the name of the character set to use when converting
|
||
characters of this type in target BYTE_ORDER to the host character
|
||
set. */
|
||
|
||
static enum c_string_type
|
||
classify_type (struct type *elttype, struct gdbarch *gdbarch,
|
||
const char **encoding)
|
||
{
|
||
enum c_string_type result;
|
||
|
||
/* We loop because ELTTYPE may be a typedef, and we want to
|
||
successively peel each typedef until we reach a type we
|
||
understand. We don't use CHECK_TYPEDEF because that will strip
|
||
all typedefs at once -- but in C, wchar_t is itself a typedef, so
|
||
that would do the wrong thing. */
|
||
while (elttype)
|
||
{
|
||
const char *name = TYPE_NAME (elttype);
|
||
|
||
if (TYPE_CODE (elttype) == TYPE_CODE_CHAR || !name)
|
||
{
|
||
result = C_CHAR;
|
||
goto done;
|
||
}
|
||
|
||
if (!strcmp (name, "wchar_t"))
|
||
{
|
||
result = C_WIDE_CHAR;
|
||
goto done;
|
||
}
|
||
|
||
if (!strcmp (name, "char16_t"))
|
||
{
|
||
result = C_CHAR_16;
|
||
goto done;
|
||
}
|
||
|
||
if (!strcmp (name, "char32_t"))
|
||
{
|
||
result = C_CHAR_32;
|
||
goto done;
|
||
}
|
||
|
||
if (TYPE_CODE (elttype) != TYPE_CODE_TYPEDEF)
|
||
break;
|
||
|
||
/* Call for side effects. */
|
||
check_typedef (elttype);
|
||
|
||
if (TYPE_TARGET_TYPE (elttype))
|
||
elttype = TYPE_TARGET_TYPE (elttype);
|
||
else
|
||
{
|
||
/* Perhaps check_typedef did not update the target type. In
|
||
this case, force the lookup again and hope it works out.
|
||
It never will for C, but it might for C++. */
|
||
CHECK_TYPEDEF (elttype);
|
||
}
|
||
}
|
||
|
||
/* Punt. */
|
||
result = C_CHAR;
|
||
|
||
done:
|
||
if (encoding)
|
||
*encoding = charset_for_string_type (result, gdbarch);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* 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. */
|
||
|
||
void
|
||
c_emit_char (int c, struct type *type,
|
||
struct ui_file *stream, int quoter)
|
||
{
|
||
const char *encoding;
|
||
|
||
classify_type (type, get_type_arch (type), &encoding);
|
||
generic_emit_char (c, type, stream, quoter, encoding);
|
||
}
|
||
|
||
void
|
||
c_printchar (int c, struct type *type, struct ui_file *stream)
|
||
{
|
||
enum c_string_type str_type;
|
||
|
||
str_type = classify_type (type, get_type_arch (type), NULL);
|
||
switch (str_type)
|
||
{
|
||
case C_CHAR:
|
||
break;
|
||
case C_WIDE_CHAR:
|
||
fputc_filtered ('L', stream);
|
||
break;
|
||
case C_CHAR_16:
|
||
fputc_filtered ('u', stream);
|
||
break;
|
||
case C_CHAR_32:
|
||
fputc_filtered ('U', stream);
|
||
break;
|
||
}
|
||
|
||
fputc_filtered ('\'', stream);
|
||
LA_EMIT_CHAR (c, type, 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
|
||
c_printstr (struct ui_file *stream, struct type *type,
|
||
const gdb_byte *string, unsigned int length,
|
||
const char *user_encoding, int force_ellipses,
|
||
const struct value_print_options *options)
|
||
{
|
||
enum c_string_type str_type;
|
||
const char *type_encoding;
|
||
const char *encoding;
|
||
|
||
str_type = (classify_type (type, get_type_arch (type), &type_encoding)
|
||
& ~C_CHAR);
|
||
switch (str_type)
|
||
{
|
||
case C_STRING:
|
||
break;
|
||
case C_WIDE_STRING:
|
||
fputs_filtered ("L", stream);
|
||
break;
|
||
case C_STRING_16:
|
||
fputs_filtered ("u", stream);
|
||
break;
|
||
case C_STRING_32:
|
||
fputs_filtered ("U", stream);
|
||
break;
|
||
}
|
||
|
||
encoding = (user_encoding && *user_encoding) ? user_encoding : type_encoding;
|
||
|
||
generic_printstr (stream, type, string, length, encoding, force_ellipses,
|
||
'"', 1, options);
|
||
}
|
||
|
||
/* Obtain a C string from the inferior storing it in a newly allocated
|
||
buffer in BUFFER, which should be freed by the caller. If the in-
|
||
and out-parameter *LENGTH is specified at -1, the string is read
|
||
until a null character of the appropriate width is found, otherwise
|
||
the string is read to the length of characters specified. The size
|
||
of a character is determined by the length of the target type of
|
||
the pointer or array. If VALUE is an array with a known length,
|
||
the function will not read past the end of the array. On
|
||
completion, *LENGTH will be set to the size of the string read in
|
||
characters. (If a length of -1 is specified, the length returned
|
||
will not include the null character). CHARSET is always set to the
|
||
target charset. */
|
||
|
||
void
|
||
c_get_string (struct value *value, gdb_byte **buffer,
|
||
int *length, struct type **char_type,
|
||
const char **charset)
|
||
{
|
||
int err, width;
|
||
unsigned int fetchlimit;
|
||
struct type *type = check_typedef (value_type (value));
|
||
struct type *element_type = TYPE_TARGET_TYPE (type);
|
||
int req_length = *length;
|
||
enum bfd_endian byte_order
|
||
= gdbarch_byte_order (get_type_arch (type));
|
||
|
||
if (element_type == NULL)
|
||
goto error;
|
||
|
||
if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
|
||
{
|
||
/* If we know the size of the array, we can use it as a limit on
|
||
the number of characters to be fetched. */
|
||
if (TYPE_NFIELDS (type) == 1
|
||
&& TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_RANGE)
|
||
{
|
||
LONGEST low_bound, high_bound;
|
||
|
||
get_discrete_bounds (TYPE_FIELD_TYPE (type, 0),
|
||
&low_bound, &high_bound);
|
||
fetchlimit = high_bound - low_bound + 1;
|
||
}
|
||
else
|
||
fetchlimit = UINT_MAX;
|
||
}
|
||
else if (TYPE_CODE (type) == TYPE_CODE_PTR)
|
||
fetchlimit = UINT_MAX;
|
||
else
|
||
/* We work only with arrays and pointers. */
|
||
goto error;
|
||
|
||
if (! c_textual_element_type (element_type, 0))
|
||
goto error;
|
||
classify_type (element_type, get_type_arch (element_type), charset);
|
||
width = TYPE_LENGTH (element_type);
|
||
|
||
/* If the string lives in GDB's memory instead of the inferior's,
|
||
then we just need to copy it to BUFFER. Also, since such strings
|
||
are arrays with known size, FETCHLIMIT will hold the size of the
|
||
array. */
|
||
if ((VALUE_LVAL (value) == not_lval
|
||
|| VALUE_LVAL (value) == lval_internalvar)
|
||
&& fetchlimit != UINT_MAX)
|
||
{
|
||
int i;
|
||
const gdb_byte *contents = value_contents (value);
|
||
|
||
/* If a length is specified, use that. */
|
||
if (*length >= 0)
|
||
i = *length;
|
||
else
|
||
/* Otherwise, look for a null character. */
|
||
for (i = 0; i < fetchlimit; i++)
|
||
if (extract_unsigned_integer (contents + i * width,
|
||
width, byte_order) == 0)
|
||
break;
|
||
|
||
/* I is now either a user-defined length, the number of non-null
|
||
characters, or FETCHLIMIT. */
|
||
*length = i * width;
|
||
*buffer = xmalloc (*length);
|
||
memcpy (*buffer, contents, *length);
|
||
err = 0;
|
||
}
|
||
else
|
||
{
|
||
CORE_ADDR addr = value_as_address (value);
|
||
|
||
err = read_string (addr, *length, width, fetchlimit,
|
||
byte_order, buffer, length);
|
||
if (err)
|
||
{
|
||
xfree (*buffer);
|
||
memory_error (err, addr);
|
||
}
|
||
}
|
||
|
||
/* If the LENGTH is specified at -1, we want to return the string
|
||
length up to the terminating null character. If an actual length
|
||
was specified, we want to return the length of exactly what was
|
||
read. */
|
||
if (req_length == -1)
|
||
/* If the last character is null, subtract it from LENGTH. */
|
||
if (*length > 0
|
||
&& extract_unsigned_integer (*buffer + *length - width,
|
||
width, byte_order) == 0)
|
||
*length -= width;
|
||
|
||
/* The read_string function will return the number of bytes read.
|
||
If length returned from read_string was > 0, return the number of
|
||
characters read by dividing the number of bytes by width. */
|
||
if (*length != 0)
|
||
*length = *length / width;
|
||
|
||
*char_type = element_type;
|
||
|
||
return;
|
||
|
||
error:
|
||
{
|
||
char *type_str;
|
||
|
||
type_str = type_to_string (type);
|
||
if (type_str)
|
||
{
|
||
make_cleanup (xfree, type_str);
|
||
error (_("Trying to read string with inappropriate type `%s'."),
|
||
type_str);
|
||
}
|
||
else
|
||
error (_("Trying to read string with inappropriate type."));
|
||
}
|
||
}
|
||
|
||
|
||
/* Evaluating C and C++ expressions. */
|
||
|
||
/* Convert a UCN. The digits of the UCN start at P and extend no
|
||
farther than LIMIT. DEST_CHARSET is the name of the character set
|
||
into which the UCN should be converted. The results are written to
|
||
OUTPUT. LENGTH is the maximum length of the UCN, either 4 or 8.
|
||
Returns a pointer to just after the final digit of the UCN. */
|
||
|
||
static char *
|
||
convert_ucn (char *p, char *limit, const char *dest_charset,
|
||
struct obstack *output, int length)
|
||
{
|
||
unsigned long result = 0;
|
||
gdb_byte data[4];
|
||
int i;
|
||
|
||
for (i = 0; i < length && p < limit && isxdigit (*p); ++i, ++p)
|
||
result = (result << 4) + host_hex_value (*p);
|
||
|
||
for (i = 3; i >= 0; --i)
|
||
{
|
||
data[i] = result & 0xff;
|
||
result >>= 8;
|
||
}
|
||
|
||
convert_between_encodings ("UTF-32BE", dest_charset, data,
|
||
4, 4, output, translit_none);
|
||
|
||
return p;
|
||
}
|
||
|
||
/* Emit a character, VALUE, which was specified numerically, to
|
||
OUTPUT. TYPE is the target character type. */
|
||
|
||
static void
|
||
emit_numeric_character (struct type *type, unsigned long value,
|
||
struct obstack *output)
|
||
{
|
||
gdb_byte *buffer;
|
||
|
||
buffer = alloca (TYPE_LENGTH (type));
|
||
pack_long (buffer, type, value);
|
||
obstack_grow (output, buffer, TYPE_LENGTH (type));
|
||
}
|
||
|
||
/* Convert an octal escape sequence. TYPE is the target character
|
||
type. The digits of the escape sequence begin at P and extend no
|
||
farther than LIMIT. The result is written to OUTPUT. Returns a
|
||
pointer to just after the final digit of the escape sequence. */
|
||
|
||
static char *
|
||
convert_octal (struct type *type, char *p,
|
||
char *limit, struct obstack *output)
|
||
{
|
||
int i;
|
||
unsigned long value = 0;
|
||
|
||
for (i = 0;
|
||
i < 3 && p < limit && isdigit (*p) && *p != '8' && *p != '9';
|
||
++i)
|
||
{
|
||
value = 8 * value + host_hex_value (*p);
|
||
++p;
|
||
}
|
||
|
||
emit_numeric_character (type, value, output);
|
||
|
||
return p;
|
||
}
|
||
|
||
/* Convert a hex escape sequence. TYPE is the target character type.
|
||
The digits of the escape sequence begin at P and extend no farther
|
||
than LIMIT. The result is written to OUTPUT. Returns a pointer to
|
||
just after the final digit of the escape sequence. */
|
||
|
||
static char *
|
||
convert_hex (struct type *type, char *p,
|
||
char *limit, struct obstack *output)
|
||
{
|
||
unsigned long value = 0;
|
||
|
||
while (p < limit && isxdigit (*p))
|
||
{
|
||
value = 16 * value + host_hex_value (*p);
|
||
++p;
|
||
}
|
||
|
||
emit_numeric_character (type, value, output);
|
||
|
||
return p;
|
||
}
|
||
|
||
#define ADVANCE \
|
||
do { \
|
||
++p; \
|
||
if (p == limit) \
|
||
error (_("Malformed escape sequence")); \
|
||
} while (0)
|
||
|
||
/* Convert an escape sequence to a target format. TYPE is the target
|
||
character type to use, and DEST_CHARSET is the name of the target
|
||
character set. The backslash of the escape sequence is at *P, and
|
||
the escape sequence will not extend past LIMIT. The results are
|
||
written to OUTPUT. Returns a pointer to just past the final
|
||
character of the escape sequence. */
|
||
|
||
static char *
|
||
convert_escape (struct type *type, const char *dest_charset,
|
||
char *p, char *limit, struct obstack *output)
|
||
{
|
||
/* Skip the backslash. */
|
||
ADVANCE;
|
||
|
||
switch (*p)
|
||
{
|
||
case '\\':
|
||
obstack_1grow (output, '\\');
|
||
++p;
|
||
break;
|
||
|
||
case 'x':
|
||
ADVANCE;
|
||
if (!isxdigit (*p))
|
||
error (_("\\x used with no following hex digits."));
|
||
p = convert_hex (type, p, limit, output);
|
||
break;
|
||
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
p = convert_octal (type, p, limit, output);
|
||
break;
|
||
|
||
case 'u':
|
||
case 'U':
|
||
{
|
||
int length = *p == 'u' ? 4 : 8;
|
||
|
||
ADVANCE;
|
||
if (!isxdigit (*p))
|
||
error (_("\\u used with no following hex digits"));
|
||
p = convert_ucn (p, limit, dest_charset, output, length);
|
||
}
|
||
}
|
||
|
||
return p;
|
||
}
|
||
|
||
/* Given a single string from a (C-specific) OP_STRING list, convert
|
||
it to a target string, handling escape sequences specially. The
|
||
output is written to OUTPUT. DATA is the input string, which has
|
||
length LEN. DEST_CHARSET is the name of the target character set,
|
||
and TYPE is the type of target character to use. */
|
||
|
||
static void
|
||
parse_one_string (struct obstack *output, char *data, int len,
|
||
const char *dest_charset, struct type *type)
|
||
{
|
||
char *limit;
|
||
|
||
limit = data + len;
|
||
|
||
while (data < limit)
|
||
{
|
||
char *p = data;
|
||
|
||
/* Look for next escape, or the end of the input. */
|
||
while (p < limit && *p != '\\')
|
||
++p;
|
||
/* If we saw a run of characters, convert them all. */
|
||
if (p > data)
|
||
convert_between_encodings (host_charset (), dest_charset,
|
||
(gdb_byte *) data, p - data, 1,
|
||
output, translit_none);
|
||
/* If we saw an escape, convert it. */
|
||
if (p < limit)
|
||
p = convert_escape (type, dest_charset, p, limit, output);
|
||
data = p;
|
||
}
|
||
}
|
||
|
||
/* Expression evaluator for the C language family. Most operations
|
||
are delegated to evaluate_subexp_standard; see that function for a
|
||
description of the arguments. */
|
||
|
||
struct value *
|
||
evaluate_subexp_c (struct type *expect_type, struct expression *exp,
|
||
int *pos, enum noside noside)
|
||
{
|
||
enum exp_opcode op = exp->elts[*pos].opcode;
|
||
|
||
switch (op)
|
||
{
|
||
case OP_STRING:
|
||
{
|
||
int oplen, limit;
|
||
struct type *type;
|
||
struct obstack output;
|
||
struct cleanup *cleanup;
|
||
struct value *result;
|
||
enum c_string_type dest_type;
|
||
const char *dest_charset;
|
||
int satisfy_expected = 0;
|
||
|
||
obstack_init (&output);
|
||
cleanup = make_cleanup_obstack_free (&output);
|
||
|
||
++*pos;
|
||
oplen = longest_to_int (exp->elts[*pos].longconst);
|
||
|
||
++*pos;
|
||
limit = *pos + BYTES_TO_EXP_ELEM (oplen + 1);
|
||
dest_type
|
||
= (enum c_string_type) longest_to_int (exp->elts[*pos].longconst);
|
||
switch (dest_type & ~C_CHAR)
|
||
{
|
||
case C_STRING:
|
||
type = language_string_char_type (exp->language_defn,
|
||
exp->gdbarch);
|
||
break;
|
||
case C_WIDE_STRING:
|
||
type = lookup_typename (exp->language_defn, exp->gdbarch,
|
||
"wchar_t", NULL, 0);
|
||
break;
|
||
case C_STRING_16:
|
||
type = lookup_typename (exp->language_defn, exp->gdbarch,
|
||
"char16_t", NULL, 0);
|
||
break;
|
||
case C_STRING_32:
|
||
type = lookup_typename (exp->language_defn, exp->gdbarch,
|
||
"char32_t", NULL, 0);
|
||
break;
|
||
default:
|
||
internal_error (__FILE__, __LINE__, _("unhandled c_string_type"));
|
||
}
|
||
|
||
/* Ensure TYPE_LENGTH is valid for TYPE. */
|
||
check_typedef (type);
|
||
|
||
/* If the caller expects an array of some integral type,
|
||
satisfy them. If something odder is expected, rely on the
|
||
caller to cast. */
|
||
if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_ARRAY)
|
||
{
|
||
struct type *element_type
|
||
= check_typedef (TYPE_TARGET_TYPE (expect_type));
|
||
|
||
if (TYPE_CODE (element_type) == TYPE_CODE_INT
|
||
|| TYPE_CODE (element_type) == TYPE_CODE_CHAR)
|
||
{
|
||
type = element_type;
|
||
satisfy_expected = 1;
|
||
}
|
||
}
|
||
|
||
dest_charset = charset_for_string_type (dest_type, exp->gdbarch);
|
||
|
||
++*pos;
|
||
while (*pos < limit)
|
||
{
|
||
int len;
|
||
|
||
len = longest_to_int (exp->elts[*pos].longconst);
|
||
|
||
++*pos;
|
||
if (noside != EVAL_SKIP)
|
||
parse_one_string (&output, &exp->elts[*pos].string, len,
|
||
dest_charset, type);
|
||
*pos += BYTES_TO_EXP_ELEM (len);
|
||
}
|
||
|
||
/* Skip the trailing length and opcode. */
|
||
*pos += 2;
|
||
|
||
if (noside == EVAL_SKIP)
|
||
{
|
||
/* Return a dummy value of the appropriate type. */
|
||
if (expect_type != NULL)
|
||
result = allocate_value (expect_type);
|
||
else if ((dest_type & C_CHAR) != 0)
|
||
result = allocate_value (type);
|
||
else
|
||
result = value_cstring ("", 0, type);
|
||
do_cleanups (cleanup);
|
||
return result;
|
||
}
|
||
|
||
if ((dest_type & C_CHAR) != 0)
|
||
{
|
||
LONGEST value;
|
||
|
||
if (obstack_object_size (&output) != TYPE_LENGTH (type))
|
||
error (_("Could not convert character "
|
||
"constant to target character set"));
|
||
value = unpack_long (type, (gdb_byte *) obstack_base (&output));
|
||
result = value_from_longest (type, value);
|
||
}
|
||
else
|
||
{
|
||
int i;
|
||
|
||
/* Write the terminating character. */
|
||
for (i = 0; i < TYPE_LENGTH (type); ++i)
|
||
obstack_1grow (&output, 0);
|
||
|
||
if (satisfy_expected)
|
||
{
|
||
LONGEST low_bound, high_bound;
|
||
int element_size = TYPE_LENGTH (type);
|
||
|
||
if (get_discrete_bounds (TYPE_INDEX_TYPE (expect_type),
|
||
&low_bound, &high_bound) < 0)
|
||
{
|
||
low_bound = 0;
|
||
high_bound = (TYPE_LENGTH (expect_type) / element_size) - 1;
|
||
}
|
||
if (obstack_object_size (&output) / element_size
|
||
> (high_bound - low_bound + 1))
|
||
error (_("Too many array elements"));
|
||
|
||
result = allocate_value (expect_type);
|
||
memcpy (value_contents_raw (result), obstack_base (&output),
|
||
obstack_object_size (&output));
|
||
}
|
||
else
|
||
result = value_cstring (obstack_base (&output),
|
||
obstack_object_size (&output),
|
||
type);
|
||
}
|
||
do_cleanups (cleanup);
|
||
return result;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
return evaluate_subexp_standard (expect_type, exp, pos, noside);
|
||
}
|
||
|
||
|
||
|
||
/* Table mapping opcodes into strings for printing operators
|
||
and precedences of the operators. */
|
||
|
||
const struct op_print c_op_print_tab[] =
|
||
{
|
||
{",", 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_PLUS, PREC_PREFIX, 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}
|
||
};
|
||
|
||
enum c_primitive_types {
|
||
c_primitive_type_int,
|
||
c_primitive_type_long,
|
||
c_primitive_type_short,
|
||
c_primitive_type_char,
|
||
c_primitive_type_float,
|
||
c_primitive_type_double,
|
||
c_primitive_type_void,
|
||
c_primitive_type_long_long,
|
||
c_primitive_type_signed_char,
|
||
c_primitive_type_unsigned_char,
|
||
c_primitive_type_unsigned_short,
|
||
c_primitive_type_unsigned_int,
|
||
c_primitive_type_unsigned_long,
|
||
c_primitive_type_unsigned_long_long,
|
||
c_primitive_type_long_double,
|
||
c_primitive_type_complex,
|
||
c_primitive_type_double_complex,
|
||
c_primitive_type_decfloat,
|
||
c_primitive_type_decdouble,
|
||
c_primitive_type_declong,
|
||
nr_c_primitive_types
|
||
};
|
||
|
||
void
|
||
c_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_c_primitive_types + 1,
|
||
struct type *);
|
||
lai->primitive_type_vector [c_primitive_type_int] = builtin->builtin_int;
|
||
lai->primitive_type_vector [c_primitive_type_long] = builtin->builtin_long;
|
||
lai->primitive_type_vector [c_primitive_type_short] = builtin->builtin_short;
|
||
lai->primitive_type_vector [c_primitive_type_char] = builtin->builtin_char;
|
||
lai->primitive_type_vector [c_primitive_type_float] = builtin->builtin_float;
|
||
lai->primitive_type_vector [c_primitive_type_double] = builtin->builtin_double;
|
||
lai->primitive_type_vector [c_primitive_type_void] = builtin->builtin_void;
|
||
lai->primitive_type_vector [c_primitive_type_long_long] = builtin->builtin_long_long;
|
||
lai->primitive_type_vector [c_primitive_type_signed_char] = builtin->builtin_signed_char;
|
||
lai->primitive_type_vector [c_primitive_type_unsigned_char] = builtin->builtin_unsigned_char;
|
||
lai->primitive_type_vector [c_primitive_type_unsigned_short] = builtin->builtin_unsigned_short;
|
||
lai->primitive_type_vector [c_primitive_type_unsigned_int] = builtin->builtin_unsigned_int;
|
||
lai->primitive_type_vector [c_primitive_type_unsigned_long] = builtin->builtin_unsigned_long;
|
||
lai->primitive_type_vector [c_primitive_type_unsigned_long_long] = builtin->builtin_unsigned_long_long;
|
||
lai->primitive_type_vector [c_primitive_type_long_double] = builtin->builtin_long_double;
|
||
lai->primitive_type_vector [c_primitive_type_complex] = builtin->builtin_complex;
|
||
lai->primitive_type_vector [c_primitive_type_double_complex] = builtin->builtin_double_complex;
|
||
lai->primitive_type_vector [c_primitive_type_decfloat] = builtin->builtin_decfloat;
|
||
lai->primitive_type_vector [c_primitive_type_decdouble] = builtin->builtin_decdouble;
|
||
lai->primitive_type_vector [c_primitive_type_declong] = builtin->builtin_declong;
|
||
|
||
lai->bool_type_default = builtin->builtin_int;
|
||
}
|
||
|
||
const struct exp_descriptor exp_descriptor_c =
|
||
{
|
||
print_subexp_standard,
|
||
operator_length_standard,
|
||
operator_check_standard,
|
||
op_name_standard,
|
||
dump_subexp_body_standard,
|
||
evaluate_subexp_c
|
||
};
|
||
|
||
const struct language_defn c_language_defn =
|
||
{
|
||
"c", /* Language name */
|
||
language_c,
|
||
range_check_off,
|
||
case_sensitive_on,
|
||
array_row_major,
|
||
macro_expansion_c,
|
||
&exp_descriptor_c,
|
||
c_parse,
|
||
c_error,
|
||
null_post_parser,
|
||
c_printchar, /* Print a character constant */
|
||
c_printstr, /* Function to print string constant */
|
||
c_emit_char, /* Print a single char */
|
||
c_print_type, /* Print a type using appropriate syntax */
|
||
c_print_typedef, /* Print a typedef using appropriate syntax */
|
||
c_val_print, /* Print a value using appropriate syntax */
|
||
c_value_print, /* Print a top-level value */
|
||
default_read_var_value, /* la_read_var_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 */
|
||
c_op_print_tab, /* expression operators for printing */
|
||
1, /* c-style arrays */
|
||
0, /* String lower bound */
|
||
default_word_break_characters,
|
||
default_make_symbol_completion_list,
|
||
c_language_arch_info,
|
||
default_print_array_index,
|
||
default_pass_by_reference,
|
||
c_get_string,
|
||
NULL, /* la_get_symbol_name_cmp */
|
||
iterate_over_symbols,
|
||
&c_varobj_ops,
|
||
LANG_MAGIC
|
||
};
|
||
|
||
enum cplus_primitive_types {
|
||
cplus_primitive_type_int,
|
||
cplus_primitive_type_long,
|
||
cplus_primitive_type_short,
|
||
cplus_primitive_type_char,
|
||
cplus_primitive_type_float,
|
||
cplus_primitive_type_double,
|
||
cplus_primitive_type_void,
|
||
cplus_primitive_type_long_long,
|
||
cplus_primitive_type_signed_char,
|
||
cplus_primitive_type_unsigned_char,
|
||
cplus_primitive_type_unsigned_short,
|
||
cplus_primitive_type_unsigned_int,
|
||
cplus_primitive_type_unsigned_long,
|
||
cplus_primitive_type_unsigned_long_long,
|
||
cplus_primitive_type_long_double,
|
||
cplus_primitive_type_complex,
|
||
cplus_primitive_type_double_complex,
|
||
cplus_primitive_type_bool,
|
||
cplus_primitive_type_decfloat,
|
||
cplus_primitive_type_decdouble,
|
||
cplus_primitive_type_declong,
|
||
nr_cplus_primitive_types
|
||
};
|
||
|
||
static void
|
||
cplus_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_cplus_primitive_types + 1,
|
||
struct type *);
|
||
lai->primitive_type_vector [cplus_primitive_type_int]
|
||
= builtin->builtin_int;
|
||
lai->primitive_type_vector [cplus_primitive_type_long]
|
||
= builtin->builtin_long;
|
||
lai->primitive_type_vector [cplus_primitive_type_short]
|
||
= builtin->builtin_short;
|
||
lai->primitive_type_vector [cplus_primitive_type_char]
|
||
= builtin->builtin_char;
|
||
lai->primitive_type_vector [cplus_primitive_type_float]
|
||
= builtin->builtin_float;
|
||
lai->primitive_type_vector [cplus_primitive_type_double]
|
||
= builtin->builtin_double;
|
||
lai->primitive_type_vector [cplus_primitive_type_void]
|
||
= builtin->builtin_void;
|
||
lai->primitive_type_vector [cplus_primitive_type_long_long]
|
||
= builtin->builtin_long_long;
|
||
lai->primitive_type_vector [cplus_primitive_type_signed_char]
|
||
= builtin->builtin_signed_char;
|
||
lai->primitive_type_vector [cplus_primitive_type_unsigned_char]
|
||
= builtin->builtin_unsigned_char;
|
||
lai->primitive_type_vector [cplus_primitive_type_unsigned_short]
|
||
= builtin->builtin_unsigned_short;
|
||
lai->primitive_type_vector [cplus_primitive_type_unsigned_int]
|
||
= builtin->builtin_unsigned_int;
|
||
lai->primitive_type_vector [cplus_primitive_type_unsigned_long]
|
||
= builtin->builtin_unsigned_long;
|
||
lai->primitive_type_vector [cplus_primitive_type_unsigned_long_long]
|
||
= builtin->builtin_unsigned_long_long;
|
||
lai->primitive_type_vector [cplus_primitive_type_long_double]
|
||
= builtin->builtin_long_double;
|
||
lai->primitive_type_vector [cplus_primitive_type_complex]
|
||
= builtin->builtin_complex;
|
||
lai->primitive_type_vector [cplus_primitive_type_double_complex]
|
||
= builtin->builtin_double_complex;
|
||
lai->primitive_type_vector [cplus_primitive_type_bool]
|
||
= builtin->builtin_bool;
|
||
lai->primitive_type_vector [cplus_primitive_type_decfloat]
|
||
= builtin->builtin_decfloat;
|
||
lai->primitive_type_vector [cplus_primitive_type_decdouble]
|
||
= builtin->builtin_decdouble;
|
||
lai->primitive_type_vector [cplus_primitive_type_declong]
|
||
= builtin->builtin_declong;
|
||
|
||
lai->bool_type_symbol = "bool";
|
||
lai->bool_type_default = builtin->builtin_bool;
|
||
}
|
||
|
||
const struct language_defn cplus_language_defn =
|
||
{
|
||
"c++", /* Language name */
|
||
language_cplus,
|
||
range_check_off,
|
||
case_sensitive_on,
|
||
array_row_major,
|
||
macro_expansion_c,
|
||
&exp_descriptor_c,
|
||
c_parse,
|
||
c_error,
|
||
null_post_parser,
|
||
c_printchar, /* Print a character constant */
|
||
c_printstr, /* Function to print string constant */
|
||
c_emit_char, /* Print a single char */
|
||
c_print_type, /* Print a type using appropriate syntax */
|
||
c_print_typedef, /* Print a typedef using appropriate syntax */
|
||
c_val_print, /* Print a value using appropriate syntax */
|
||
c_value_print, /* Print a top-level value */
|
||
default_read_var_value, /* la_read_var_value */
|
||
cplus_skip_trampoline, /* Language specific skip_trampoline */
|
||
"this", /* name_of_this */
|
||
cp_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
|
||
cp_lookup_transparent_type, /* lookup_transparent_type */
|
||
gdb_demangle, /* Language specific symbol demangler */
|
||
cp_class_name_from_physname, /* Language specific
|
||
class_name_from_physname */
|
||
c_op_print_tab, /* expression operators for printing */
|
||
1, /* c-style arrays */
|
||
0, /* String lower bound */
|
||
default_word_break_characters,
|
||
default_make_symbol_completion_list,
|
||
cplus_language_arch_info,
|
||
default_print_array_index,
|
||
cp_pass_by_reference,
|
||
c_get_string,
|
||
NULL, /* la_get_symbol_name_cmp */
|
||
iterate_over_symbols,
|
||
&cplus_varobj_ops,
|
||
LANG_MAGIC
|
||
};
|
||
|
||
const struct language_defn asm_language_defn =
|
||
{
|
||
"asm", /* Language name */
|
||
language_asm,
|
||
range_check_off,
|
||
case_sensitive_on,
|
||
array_row_major,
|
||
macro_expansion_c,
|
||
&exp_descriptor_c,
|
||
c_parse,
|
||
c_error,
|
||
null_post_parser,
|
||
c_printchar, /* Print a character constant */
|
||
c_printstr, /* Function to print string constant */
|
||
c_emit_char, /* Print a single char */
|
||
c_print_type, /* Print a type using appropriate syntax */
|
||
c_print_typedef, /* Print a typedef using appropriate syntax */
|
||
c_val_print, /* Print a value using appropriate syntax */
|
||
c_value_print, /* Print a top-level value */
|
||
default_read_var_value, /* la_read_var_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 */
|
||
c_op_print_tab, /* expression operators for printing */
|
||
1, /* c-style arrays */
|
||
0, /* String lower bound */
|
||
default_word_break_characters,
|
||
default_make_symbol_completion_list,
|
||
c_language_arch_info, /* FIXME: la_language_arch_info. */
|
||
default_print_array_index,
|
||
default_pass_by_reference,
|
||
c_get_string,
|
||
NULL, /* la_get_symbol_name_cmp */
|
||
iterate_over_symbols,
|
||
&default_varobj_ops,
|
||
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,
|
||
range_check_off,
|
||
case_sensitive_on,
|
||
array_row_major,
|
||
macro_expansion_c,
|
||
&exp_descriptor_c,
|
||
c_parse,
|
||
c_error,
|
||
null_post_parser,
|
||
c_printchar, /* Print a character constant */
|
||
c_printstr, /* Function to print string constant */
|
||
c_emit_char, /* Print a single char */
|
||
c_print_type, /* Print a type using appropriate syntax */
|
||
c_print_typedef, /* Print a typedef using appropriate syntax */
|
||
c_val_print, /* Print a value using appropriate syntax */
|
||
c_value_print, /* Print a top-level value */
|
||
default_read_var_value, /* la_read_var_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 */
|
||
c_op_print_tab, /* expression operators for printing */
|
||
1, /* c-style arrays */
|
||
0, /* String lower bound */
|
||
default_word_break_characters,
|
||
default_make_symbol_completion_list,
|
||
c_language_arch_info,
|
||
default_print_array_index,
|
||
default_pass_by_reference,
|
||
c_get_string,
|
||
NULL, /* la_get_symbol_name_cmp */
|
||
iterate_over_symbols,
|
||
&default_varobj_ops,
|
||
LANG_MAGIC
|
||
};
|
||
|
||
void
|
||
_initialize_c_language (void)
|
||
{
|
||
add_language (&c_language_defn);
|
||
add_language (&cplus_language_defn);
|
||
add_language (&asm_language_defn);
|
||
add_language (&minimal_language_defn);
|
||
}
|