524 lines
18 KiB
C
524 lines
18 KiB
C
/* C language support routines for GDB, the GNU debugger.
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Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002, 2003,
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2004, 2005, 2007, 2008, 2009 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
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "parser-defs.h"
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#include "language.h"
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#include "c-lang.h"
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#include "valprint.h"
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#include "macroscope.h"
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#include "gdb_assert.h"
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#include "charset.h"
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#include "gdb_string.h"
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#include "demangle.h"
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#include "cp-abi.h"
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#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);
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/* Print the character C on STREAM as part of the contents of a literal
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string whose delimiter is QUOTER. Note that that format for printing
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characters and strings is language specific. */
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static void
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c_emit_char (int c, struct ui_file *stream, int quoter)
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{
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const char *escape;
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int host_char;
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c &= 0xFF; /* Avoid sign bit follies */
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escape = c_target_char_has_backslash_escape (c);
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if (escape)
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{
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if (quoter == '"' && strcmp (escape, "0") == 0)
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/* Print nulls embedded in double quoted strings as \000 to
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prevent ambiguity. */
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fprintf_filtered (stream, "\\000");
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else
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fprintf_filtered (stream, "\\%s", escape);
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}
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else if (target_char_to_host (c, &host_char)
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&& host_char_print_literally (host_char))
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{
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if (host_char == '\\' || host_char == quoter)
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fputs_filtered ("\\", stream);
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fprintf_filtered (stream, "%c", host_char);
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}
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else
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fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
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}
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void
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c_printchar (int c, struct ui_file *stream)
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{
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fputc_filtered ('\'', stream);
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LA_EMIT_CHAR (c, stream, '\'');
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fputc_filtered ('\'', stream);
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}
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/* Print the character string STRING, printing at most LENGTH characters.
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LENGTH is -1 if the string is nul terminated. Each character is WIDTH bytes
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long. Printing stops early if the number hits print_max; repeat counts are
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printed as appropriate. Print ellipses at the end if we had to stop before
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printing LENGTH characters, or if FORCE_ELLIPSES. */
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void
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c_printstr (struct ui_file *stream, const gdb_byte *string,
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unsigned int length, int width, int force_ellipses,
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const struct value_print_options *options)
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{
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unsigned int i;
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unsigned int things_printed = 0;
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int in_quotes = 0;
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int need_comma = 0;
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/* If the string was not truncated due to `set print elements', and
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the last byte of it is a null, we don't print that, in traditional C
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style. */
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if (!force_ellipses
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&& length > 0
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&& (extract_unsigned_integer (string + (length - 1) * width, width)
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== '\0'))
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length--;
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if (length == 0)
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{
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fputs_filtered ("\"\"", stream);
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return;
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}
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for (i = 0; i < length && things_printed < options->print_max; ++i)
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{
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/* Position of the character we are examining
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to see whether it is repeated. */
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unsigned int rep1;
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/* Number of repetitions we have detected so far. */
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unsigned int reps;
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unsigned long current_char;
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QUIT;
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if (need_comma)
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{
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fputs_filtered (", ", stream);
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need_comma = 0;
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}
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current_char = extract_unsigned_integer (string + i * width, width);
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rep1 = i + 1;
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reps = 1;
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while (rep1 < length
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&& extract_unsigned_integer (string + rep1 * width, width)
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== current_char)
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{
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++rep1;
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++reps;
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}
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if (reps > options->repeat_count_threshold)
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{
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if (in_quotes)
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{
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if (options->inspect_it)
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fputs_filtered ("\\\", ", stream);
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else
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fputs_filtered ("\", ", stream);
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in_quotes = 0;
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}
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LA_PRINT_CHAR (current_char, stream);
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fprintf_filtered (stream, _(" <repeats %u times>"), reps);
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i = rep1 - 1;
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things_printed += options->repeat_count_threshold;
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need_comma = 1;
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}
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else
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{
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if (!in_quotes)
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{
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if (options->inspect_it)
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fputs_filtered ("\\\"", stream);
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else
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fputs_filtered ("\"", stream);
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in_quotes = 1;
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}
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LA_EMIT_CHAR (current_char, stream, '"');
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++things_printed;
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}
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}
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/* Terminate the quotes if necessary. */
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if (in_quotes)
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{
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if (options->inspect_it)
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fputs_filtered ("\\\"", stream);
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else
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fputs_filtered ("\"", stream);
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}
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if (force_ellipses || i < length)
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fputs_filtered ("...", stream);
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}
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/* Preprocessing and parsing C and C++ expressions. */
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/* Table mapping opcodes into strings for printing operators
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and precedences of the operators. */
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const struct op_print c_op_print_tab[] =
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{
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{",", BINOP_COMMA, PREC_COMMA, 0},
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{"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
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{"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
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{"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
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{"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
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{"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
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{"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
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{"==", BINOP_EQUAL, PREC_EQUAL, 0},
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{"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
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{"<=", BINOP_LEQ, PREC_ORDER, 0},
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{">=", BINOP_GEQ, PREC_ORDER, 0},
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{">", BINOP_GTR, PREC_ORDER, 0},
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{"<", BINOP_LESS, PREC_ORDER, 0},
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{">>", BINOP_RSH, PREC_SHIFT, 0},
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{"<<", BINOP_LSH, PREC_SHIFT, 0},
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{"+", BINOP_ADD, PREC_ADD, 0},
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{"-", BINOP_SUB, PREC_ADD, 0},
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{"*", BINOP_MUL, PREC_MUL, 0},
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{"/", BINOP_DIV, PREC_MUL, 0},
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{"%", BINOP_REM, PREC_MUL, 0},
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{"@", BINOP_REPEAT, PREC_REPEAT, 0},
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{"-", UNOP_NEG, PREC_PREFIX, 0},
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{"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
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{"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
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{"*", UNOP_IND, PREC_PREFIX, 0},
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{"&", UNOP_ADDR, PREC_PREFIX, 0},
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{"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
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{"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
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{"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
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{NULL, 0, 0, 0}
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};
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enum c_primitive_types {
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c_primitive_type_int,
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c_primitive_type_long,
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c_primitive_type_short,
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c_primitive_type_char,
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c_primitive_type_float,
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c_primitive_type_double,
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c_primitive_type_void,
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c_primitive_type_long_long,
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c_primitive_type_signed_char,
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c_primitive_type_unsigned_char,
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c_primitive_type_unsigned_short,
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c_primitive_type_unsigned_int,
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c_primitive_type_unsigned_long,
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c_primitive_type_unsigned_long_long,
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c_primitive_type_long_double,
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c_primitive_type_complex,
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c_primitive_type_double_complex,
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c_primitive_type_decfloat,
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c_primitive_type_decdouble,
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c_primitive_type_declong,
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nr_c_primitive_types
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};
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void
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c_language_arch_info (struct gdbarch *gdbarch,
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struct language_arch_info *lai)
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{
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const struct builtin_type *builtin = builtin_type (gdbarch);
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lai->string_char_type = builtin->builtin_char;
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lai->primitive_type_vector
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= GDBARCH_OBSTACK_CALLOC (gdbarch, nr_c_primitive_types + 1,
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struct type *);
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lai->primitive_type_vector [c_primitive_type_int] = builtin->builtin_int;
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lai->primitive_type_vector [c_primitive_type_long] = builtin->builtin_long;
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lai->primitive_type_vector [c_primitive_type_short] = builtin->builtin_short;
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lai->primitive_type_vector [c_primitive_type_char] = builtin->builtin_char;
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lai->primitive_type_vector [c_primitive_type_float] = builtin->builtin_float;
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lai->primitive_type_vector [c_primitive_type_double] = builtin->builtin_double;
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lai->primitive_type_vector [c_primitive_type_void] = builtin->builtin_void;
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lai->primitive_type_vector [c_primitive_type_long_long] = builtin->builtin_long_long;
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lai->primitive_type_vector [c_primitive_type_signed_char] = builtin->builtin_signed_char;
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lai->primitive_type_vector [c_primitive_type_unsigned_char] = builtin->builtin_unsigned_char;
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lai->primitive_type_vector [c_primitive_type_unsigned_short] = builtin->builtin_unsigned_short;
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lai->primitive_type_vector [c_primitive_type_unsigned_int] = builtin->builtin_unsigned_int;
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lai->primitive_type_vector [c_primitive_type_unsigned_long] = builtin->builtin_unsigned_long;
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lai->primitive_type_vector [c_primitive_type_unsigned_long_long] = builtin->builtin_unsigned_long_long;
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lai->primitive_type_vector [c_primitive_type_long_double] = builtin->builtin_long_double;
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lai->primitive_type_vector [c_primitive_type_complex] = builtin->builtin_complex;
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lai->primitive_type_vector [c_primitive_type_double_complex] = builtin->builtin_double_complex;
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lai->primitive_type_vector [c_primitive_type_decfloat] = builtin->builtin_decfloat;
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lai->primitive_type_vector [c_primitive_type_decdouble] = builtin->builtin_decdouble;
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lai->primitive_type_vector [c_primitive_type_declong] = builtin->builtin_declong;
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lai->bool_type_default = builtin->builtin_int;
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}
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const struct language_defn c_language_defn =
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{
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"c", /* Language name */
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language_c,
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range_check_off,
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type_check_off,
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case_sensitive_on,
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array_row_major,
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macro_expansion_c,
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&exp_descriptor_standard,
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c_parse,
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c_error,
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null_post_parser,
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c_printchar, /* Print a character constant */
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c_printstr, /* Function to print string constant */
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c_emit_char, /* Print a single char */
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c_print_type, /* Print a type using appropriate syntax */
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c_print_typedef, /* Print a typedef using appropriate syntax */
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c_val_print, /* Print a value using appropriate syntax */
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c_value_print, /* Print a top-level value */
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NULL, /* Language specific skip_trampoline */
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NULL, /* name_of_this */
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basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
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basic_lookup_transparent_type,/* lookup_transparent_type */
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NULL, /* Language specific symbol demangler */
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NULL, /* Language specific class_name_from_physname */
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c_op_print_tab, /* expression operators for printing */
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1, /* c-style arrays */
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0, /* String lower bound */
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default_word_break_characters,
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default_make_symbol_completion_list,
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c_language_arch_info,
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default_print_array_index,
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default_pass_by_reference,
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LANG_MAGIC
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};
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enum cplus_primitive_types {
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cplus_primitive_type_int,
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cplus_primitive_type_long,
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cplus_primitive_type_short,
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cplus_primitive_type_char,
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cplus_primitive_type_float,
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cplus_primitive_type_double,
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cplus_primitive_type_void,
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cplus_primitive_type_long_long,
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cplus_primitive_type_signed_char,
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cplus_primitive_type_unsigned_char,
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cplus_primitive_type_unsigned_short,
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cplus_primitive_type_unsigned_int,
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cplus_primitive_type_unsigned_long,
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cplus_primitive_type_unsigned_long_long,
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cplus_primitive_type_long_double,
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cplus_primitive_type_complex,
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cplus_primitive_type_double_complex,
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cplus_primitive_type_bool,
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cplus_primitive_type_decfloat,
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cplus_primitive_type_decdouble,
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cplus_primitive_type_declong,
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nr_cplus_primitive_types
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};
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static void
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cplus_language_arch_info (struct gdbarch *gdbarch,
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struct language_arch_info *lai)
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{
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const struct builtin_type *builtin = builtin_type (gdbarch);
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lai->string_char_type = builtin->builtin_char;
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lai->primitive_type_vector
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= GDBARCH_OBSTACK_CALLOC (gdbarch, nr_cplus_primitive_types + 1,
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struct type *);
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lai->primitive_type_vector [cplus_primitive_type_int]
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= builtin->builtin_int;
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lai->primitive_type_vector [cplus_primitive_type_long]
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= builtin->builtin_long;
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lai->primitive_type_vector [cplus_primitive_type_short]
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= builtin->builtin_short;
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lai->primitive_type_vector [cplus_primitive_type_char]
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= builtin->builtin_char;
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lai->primitive_type_vector [cplus_primitive_type_float]
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= builtin->builtin_float;
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lai->primitive_type_vector [cplus_primitive_type_double]
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= builtin->builtin_double;
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lai->primitive_type_vector [cplus_primitive_type_void]
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= builtin->builtin_void;
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lai->primitive_type_vector [cplus_primitive_type_long_long]
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= builtin->builtin_long_long;
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lai->primitive_type_vector [cplus_primitive_type_signed_char]
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= builtin->builtin_signed_char;
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lai->primitive_type_vector [cplus_primitive_type_unsigned_char]
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= builtin->builtin_unsigned_char;
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lai->primitive_type_vector [cplus_primitive_type_unsigned_short]
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= builtin->builtin_unsigned_short;
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lai->primitive_type_vector [cplus_primitive_type_unsigned_int]
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= builtin->builtin_unsigned_int;
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lai->primitive_type_vector [cplus_primitive_type_unsigned_long]
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= builtin->builtin_unsigned_long;
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lai->primitive_type_vector [cplus_primitive_type_unsigned_long_long]
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= builtin->builtin_unsigned_long_long;
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lai->primitive_type_vector [cplus_primitive_type_long_double]
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= builtin->builtin_long_double;
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lai->primitive_type_vector [cplus_primitive_type_complex]
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= builtin->builtin_complex;
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lai->primitive_type_vector [cplus_primitive_type_double_complex]
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= builtin->builtin_double_complex;
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lai->primitive_type_vector [cplus_primitive_type_bool]
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= builtin->builtin_bool;
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lai->primitive_type_vector [cplus_primitive_type_decfloat]
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= builtin->builtin_decfloat;
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lai->primitive_type_vector [cplus_primitive_type_decdouble]
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= builtin->builtin_decdouble;
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lai->primitive_type_vector [cplus_primitive_type_declong]
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= builtin->builtin_declong;
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lai->bool_type_symbol = "bool";
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lai->bool_type_default = builtin->builtin_bool;
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}
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const struct language_defn cplus_language_defn =
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{
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"c++", /* Language name */
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language_cplus,
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range_check_off,
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type_check_off,
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case_sensitive_on,
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array_row_major,
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macro_expansion_c,
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&exp_descriptor_standard,
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c_parse,
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c_error,
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null_post_parser,
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c_printchar, /* Print a character constant */
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c_printstr, /* Function to print string constant */
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c_emit_char, /* Print a single char */
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c_print_type, /* Print a type using appropriate syntax */
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c_print_typedef, /* Print a typedef using appropriate syntax */
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c_val_print, /* Print a value using appropriate syntax */
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c_value_print, /* Print a top-level value */
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cplus_skip_trampoline, /* Language specific skip_trampoline */
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"this", /* name_of_this */
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cp_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
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cp_lookup_transparent_type, /* lookup_transparent_type */
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cplus_demangle, /* Language specific symbol demangler */
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cp_class_name_from_physname, /* Language specific class_name_from_physname */
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c_op_print_tab, /* expression operators for printing */
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1, /* c-style arrays */
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0, /* String lower bound */
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default_word_break_characters,
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default_make_symbol_completion_list,
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cplus_language_arch_info,
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default_print_array_index,
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cp_pass_by_reference,
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LANG_MAGIC
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};
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const struct language_defn asm_language_defn =
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{
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"asm", /* Language name */
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language_asm,
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range_check_off,
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type_check_off,
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case_sensitive_on,
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array_row_major,
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macro_expansion_c,
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&exp_descriptor_standard,
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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 */
|
||
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,
|
||
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,
|
||
type_check_off,
|
||
case_sensitive_on,
|
||
array_row_major,
|
||
macro_expansion_c,
|
||
&exp_descriptor_standard,
|
||
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 */
|
||
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,
|
||
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);
|
||
}
|