summaryrefslogtreecommitdiff
path: root/gdb/c-lang.c
diff options
context:
space:
mode:
authorStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
committerStan Shebs <shebs@apple.com>1999-04-16 01:35:26 +0000
commit14cd51f7793a9ce07bc435069f57269450141363 (patch)
tree280a2da48f771d61be5b451ddbacdf9ef8e9ad13 /gdb/c-lang.c
downloadgdb-14cd51f7793a9ce07bc435069f57269450141363.tar.gz
Initial revision
Diffstat (limited to 'gdb/c-lang.c')
-rw-r--r--gdb/c-lang.c527
1 files changed, 527 insertions, 0 deletions
diff --git a/gdb/c-lang.c b/gdb/c-lang.c
new file mode 100644
index 00000000000..e7aa05574ca
--- /dev/null
+++ b/gdb/c-lang.c
@@ -0,0 +1,527 @@
+/* C language support routines for GDB, the GNU debugger.
+ Copyright 1992, 1993, 1994 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 2 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, 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"
+
+static void c_emit_char PARAMS ((int c, GDB_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 (c, stream, quoter)
+ register int c;
+ GDB_FILE *stream;
+ int quoter;
+{
+ c &= 0xFF; /* Avoid sign bit follies */
+
+ if (PRINT_LITERAL_FORM (c))
+ {
+ if (c == '\\' || c == quoter)
+ {
+ fputs_filtered ("\\", stream);
+ }
+ fprintf_filtered (stream, "%c", c);
+ }
+ else
+ {
+ switch (c)
+ {
+ case '\n':
+ fputs_filtered ("\\n", stream);
+ break;
+ case '\b':
+ fputs_filtered ("\\b", stream);
+ break;
+ case '\t':
+ fputs_filtered ("\\t", stream);
+ break;
+ case '\f':
+ fputs_filtered ("\\f", stream);
+ break;
+ case '\r':
+ fputs_filtered ("\\r", stream);
+ break;
+ case '\033':
+ fputs_filtered ("\\e", stream);
+ break;
+ case '\007':
+ fputs_filtered ("\\a", stream);
+ break;
+ default:
+ fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
+ break;
+ }
+ }
+}
+
+void
+c_printchar (c, stream)
+ int c;
+ GDB_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
+c_printstr (stream, string, length, width, force_ellipses)
+ GDB_FILE *stream;
+ char *string;
+ unsigned int length;
+ int width;
+ int force_ellipses;
+{
+ register unsigned int i;
+ unsigned int things_printed = 0;
+ int in_quotes = 0;
+ int need_comma = 0;
+ extern int inspect_it;
+ extern int repeat_count_threshold;
+ extern int print_max;
+
+ /* 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
+ 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)
+ == 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 *
+c_create_fundamental_type (objfile, typeid)
+ struct objfile *objfile;
+ int typeid;
+{
+ register struct type *type = NULL;
+
+ switch (typeid)
+ {
+ 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,
+ 0, "char", objfile);
+ TYPE_FLAGS (type) |= TYPE_FLAG_NOSIGN;
+ 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_TEMPLATE_ARG:
+ type = init_type (TYPE_CODE_TEMPLATE_ARG,
+ 0,
+ 0, "<template arg>", objfile);
+
+ break;
+ }
+ return (type);
+}
+
+
+/* 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_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},
+ /* C++ */
+ {"::", BINOP_SCOPE, PREC_PREFIX, 0},
+ {NULL, 0, 0, 0}
+};
+
+struct type ** CONST_PTR (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
+};
+
+const struct language_defn c_language_defn = {
+ "c", /* Language name */
+ language_c,
+ c_builtin_types,
+ range_check_off,
+ type_check_off,
+ c_parse,
+ c_error,
+ evaluate_subexp_standard,
+ 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 */
+ {"", "", "", ""}, /* 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 */
+ LANG_MAGIC
+};
+
+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
+};
+
+const struct language_defn cplus_language_defn = {
+ "c++", /* Language name */
+ language_cplus,
+ cplus_builtin_types,
+ range_check_off,
+ type_check_off,
+ c_parse,
+ c_error,
+ evaluate_subexp_standard,
+ 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 */
+ {"", "", "", ""}, /* 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 */
+ LANG_MAGIC
+};
+
+const struct language_defn asm_language_defn = {
+ "asm", /* Language name */
+ language_asm,
+ c_builtin_types,
+ range_check_off,
+ type_check_off,
+ c_parse,
+ c_error,
+ evaluate_subexp_standard,
+ 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 */
+ {"", "", "", ""}, /* 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 */
+ LANG_MAGIC
+};
+
+void
+_initialize_c_language ()
+{
+ add_language (&c_language_defn);
+ add_language (&cplus_language_defn);
+ add_language (&asm_language_defn);
+}