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-rw-r--r--gdb/objc-lang.c1905
1 files changed, 1905 insertions, 0 deletions
diff --git a/gdb/objc-lang.c b/gdb/objc-lang.c
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--- /dev/null
+++ b/gdb/objc-lang.c
@@ -0,0 +1,1905 @@
+/* Objective C language support routines for GDB, the GNU debugger.
+ Copyright 1996 NeXT Software, 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 "objc-lang.h"
+#include "complaints.h"
+#include "value.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "string.h" /* for strchr */
+#include "target.h" /* for target_has_execution */
+#include "gdbcore.h"
+#include "gdbcmd.h"
+#include "frame.h"
+#include "gdb_regex.h"
+#include "regcache.h"
+
+#include <ctype.h>
+
+struct objc_object {
+ CORE_ADDR isa;
+};
+
+struct objc_class {
+ CORE_ADDR isa;
+ CORE_ADDR super_class;
+ CORE_ADDR name;
+ long version;
+ long info;
+ long instance_size;
+ CORE_ADDR ivars;
+ CORE_ADDR methods;
+ CORE_ADDR cache;
+ CORE_ADDR protocols;
+};
+
+struct objc_super {
+ CORE_ADDR receiver;
+ CORE_ADDR class;
+};
+
+struct objc_method {
+ CORE_ADDR name;
+ CORE_ADDR types;
+ CORE_ADDR imp;
+};
+
+/* Complaints about ObjC classes, selectors, etc. */
+
+static struct complaint noclass_lookup_complaint =
+ {"no way to lookup Objective-C classes", 0, 0};
+
+static struct complaint nosel_lookup_complaint =
+ {"no way to lookup Objective-C selectors", 0, 0};
+
+
+#if (!defined __GNUC__ || __GNUC__ < 2 || __GNUC_MINOR__ < (defined __cplusplus ? 6 : 4))
+#define __CHECK_FUNCTION ((__const char *) 0)
+#else
+#define __CHECK_FUNCTION __PRETTY_FUNCTION__
+#endif
+
+#define CHECK(expression) \
+ ((void) ((expression) ? 0 : gdb_check (#expression, __FILE__, __LINE__, \
+ __CHECK_FUNCTION)))
+
+#define CHECK_FATAL(expression) \
+ ((void) ((expression) ? 0 : gdb_check_fatal (#expression, __FILE__, \
+ __LINE__, __CHECK_FUNCTION)))
+
+void
+gdb_check (const char *str, const char *file, unsigned int line,
+ const char *func)
+{
+ error ("assertion failure on line %u of \"%s\" in function \"%s\": %s\n",
+ line, file, func, str);
+}
+
+void
+gdb_check_fatal (const char *str, const char *file, unsigned int line,
+ const char *func)
+{
+ internal_error (file, line,
+ "assertion failure in function \"%s\": %s\n", func, str);
+}
+
+/* Lookup a structure type named "struct NAME",
+ visible in lexical block BLOCK.
+ If NOERR is nonzero, return zero if NAME is not suitably defined. */
+
+struct symbol *
+lookup_struct_typedef (char *name, struct block *block, int noerr)
+{
+ register struct symbol *sym;
+
+ sym = lookup_symbol (name, block, STRUCT_NAMESPACE, 0, (struct symtab **) NULL);
+
+ if (sym == NULL)
+ {
+ if (noerr)
+ return 0;
+ else
+ error ("No struct type named %s.", name);
+ }
+ if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT)
+ {
+ if (noerr)
+ return 0;
+ else
+ error ("This context has class, union or enum %s, not a struct.", name);
+ }
+ return sym;
+}
+
+CORE_ADDR
+lookup_objc_class (char *classname)
+{
+ struct value * function, *classval;
+
+ if (! target_has_execution)
+ {
+ /* can't call into inferior to lookup class */
+ return 0;
+ }
+
+ if (lookup_minimal_symbol("objc_lookUpClass", 0, 0))
+ function = find_function_in_inferior("objc_lookUpClass");
+ else if (lookup_minimal_symbol ("objc_lookup_class", 0, 0))
+ function = find_function_in_inferior("objc_lookup_class");
+ else
+ {
+ complain (&noclass_lookup_complaint, 0);
+ return 0;
+ }
+
+ classval = value_string (classname, strlen (classname) + 1);
+ classval = value_coerce_array (classval);
+ return (CORE_ADDR) value_as_long (call_function_by_hand (function,
+ 1, &classval));
+}
+
+int
+lookup_child_selector (char *selname)
+{
+ struct value * function, *selstring;
+
+ if (! target_has_execution)
+ {
+ /* can't call into inferior to lookup selector */
+ return 0;
+ }
+
+ if (lookup_minimal_symbol("sel_getUid", 0, 0))
+ function = find_function_in_inferior("sel_getUid");
+ else if (lookup_minimal_symbol ("sel_get_any_uid", 0, 0))
+ function = find_function_in_inferior("sel_get_any_uid");
+ else
+ {
+ complain (&nosel_lookup_complaint, 0);
+ return 0;
+ }
+
+ selstring = value_coerce_array (value_string (selname, strlen (selname) + 1));
+ return value_as_long (call_function_by_hand (function, 1, &selstring));
+}
+
+struct value *
+value_nsstring (char *ptr, int len)
+{
+ struct value *stringValue[3];
+ struct value *function, *nsstringValue;
+ struct symbol *sym;
+ struct type *type;
+
+ if (!target_has_execution)
+ return 0; /* can't call into inferior to create NSString */
+
+ if (!(sym = lookup_struct_typedef("NSString", 0, 1)) &&
+ !(sym = lookup_struct_typedef("NXString", 0, 1)))
+ type = lookup_pointer_type(builtin_type_void);
+ else
+ type = lookup_pointer_type(SYMBOL_TYPE (sym));
+
+ stringValue[2] = value_string(ptr, len);
+ stringValue[2] = value_coerce_array(stringValue[2]);
+ /* _NSNewStringFromCString replaces "istr" after Lantern2A */
+ if (lookup_minimal_symbol("_NSNewStringFromCString", 0, 0))
+ {
+ function = find_function_in_inferior("_NSNewStringFromCString");
+ nsstringValue = call_function_by_hand(function, 1, &stringValue[2]);
+ }
+ else if (lookup_minimal_symbol("istr", 0, 0))
+ {
+ function = find_function_in_inferior("istr");
+ nsstringValue = call_function_by_hand(function, 1, &stringValue[2]);
+ }
+ else if (lookup_minimal_symbol("+[NSString stringWithCString:]", 0, 0))
+ {
+ function = find_function_in_inferior("+[NSString stringWithCString:]");
+ stringValue[0] = value_from_longest
+ (builtin_type_long, lookup_objc_class ("NSString"));
+ stringValue[1] = value_from_longest
+ (builtin_type_long, lookup_child_selector ("stringWithCString:"));
+ nsstringValue = call_function_by_hand(function, 3, &stringValue[0]);
+ }
+ else
+ error ("NSString: internal error -- no way to create new NSString");
+
+ VALUE_TYPE(nsstringValue) = type;
+ return nsstringValue;
+}
+
+/* Objective C name demangling */
+
+char *
+objc_demangle (const char *mangled)
+{
+ char *demangled, *cp;
+
+ if (mangled[0] == '_' &&
+ (mangled[1] == 'i' || mangled[1] == 'c') &&
+ mangled[2] == '_')
+ {
+ cp = demangled = xmalloc(strlen(mangled) + 2);
+
+ if (mangled[1] == 'i')
+ *cp++ = '-'; /* for instance method */
+ else
+ *cp++ = '+'; /* for class method */
+
+ *cp++ = '['; /* opening left brace */
+ strcpy(cp, mangled+3); /* tack on the rest of the mangled name */
+
+ while (*cp && *cp == '_')
+ cp++; /* skip any initial underbars in class name */
+
+ if (!(cp = strchr(cp, '_'))) /* find first non-initial underbar */
+ {
+ free(demangled); /* not mangled name */
+ return NULL;
+ }
+ if (cp[1] == '_') { /* easy case: no category name */
+ *cp++ = ' '; /* replace two '_' with one ' ' */
+ strcpy(cp, mangled + (cp - demangled) + 2);
+ }
+ else {
+ *cp++ = '('; /* less easy case: category name */
+ if (!(cp = strchr(cp, '_')))
+ {
+ free(demangled); /* not mangled name */
+ return NULL;
+ }
+ *cp++ = ')';
+ *cp++ = ' '; /* overwriting 1st char of method name... */
+ strcpy(cp, mangled + (cp - demangled)); /* get it back */
+ }
+
+ while (*cp && *cp == '_')
+ cp++; /* skip any initial underbars in method name */
+
+ for (; *cp; cp++)
+ if (*cp == '_')
+ *cp = ':'; /* replace remaining '_' with ':' */
+
+ *cp++ = ']'; /* closing right brace */
+ *cp++ = 0; /* string terminator */
+ return demangled;
+ }
+ else
+ return NULL; /* not an objc mangled name */
+}
+
+/* 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
+objc_emit_char (register int c, struct ui_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;
+ }
+ }
+}
+
+static void
+objc_printchar (int c, struct ui_file *stream)
+{
+ fputs_filtered ("'", stream);
+ objc_emit_char (c, stream, '\'');
+ fputs_filtered ("'", stream);
+}
+
+/* Print the character string STRING, printing at most LENGTH characters.
+ Printing stops early if the number hits print_max; repeat counts
+ are printed as appropriate. Print ellipses at the end if we
+ had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. */
+
+static void
+objc_printstr (struct ui_file *stream, char *string, unsigned int length,
+ 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 && string[length-1] == '\0')
+ length--;
+
+ if (length == 0)
+ {
+ fputs_filtered ("\"\"", stream);
+ return;
+ }
+
+ for (i = 0; i < length && things_printed < print_max; ++i)
+ {
+ /* Position of the character we are examining
+ to see whether it is repeated. */
+ unsigned int rep1;
+ /* Number of repetitions we have detected so far. */
+ unsigned int reps;
+
+ QUIT;
+
+ if (need_comma)
+ {
+ fputs_filtered (", ", stream);
+ need_comma = 0;
+ }
+
+ rep1 = i + 1;
+ reps = 1;
+ while (rep1 < length && string[rep1] == string[i])
+ {
+ ++rep1;
+ ++reps;
+ }
+
+ if (reps > repeat_count_threshold)
+ {
+ if (in_quotes)
+ {
+ if (inspect_it)
+ fputs_filtered ("\\\", ", stream);
+ else
+ fputs_filtered ("\", ", stream);
+ in_quotes = 0;
+ }
+ objc_printchar (string[i], 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;
+ }
+ objc_emit_char (string[i], 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 */
+
+static struct type *
+objc_create_fundamental_type (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_CHAR:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+ 0, "char", objfile);
+ 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;
+ }
+ return (type);
+}
+
+
+/* Table mapping opcodes into strings for printing operators
+ and precedences of the operators. */
+
+static const struct op_print objc_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},
+ {NULL, 0, 0, 0}
+};
+
+struct type ** const (objc_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 objc_language_defn = {
+ "objective-c", /* Language name */
+ language_objc,
+ objc_builtin_types,
+ range_check_off,
+ type_check_off,
+ case_sensitive_on,
+ objc_parse,
+ objc_error,
+ evaluate_subexp_standard,
+ objc_printchar, /* Print a character constant */
+ objc_printstr, /* Function to print string constant */
+ objc_emit_char,
+ objc_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 */
+ objc_op_print_tab, /* expression operators for printing */
+ 1, /* c-style arrays */
+ 0, /* String lower bound */
+ &builtin_type_char, /* Type of string elements */
+ LANG_MAGIC
+};
+
+/*
+ * ObjC:
+ * Following functions help construct Objective C message calls
+ */
+
+struct selname /* for parsing Objective C */
+ {
+ struct selname *next;
+ char *msglist_sel;
+ int msglist_len;
+ };
+
+static int msglist_len;
+static struct selname *selname_chain;
+static char *msglist_sel;
+
+void
+start_msglist(void)
+{
+ register struct selname *new =
+ (struct selname *) xmalloc (sizeof (struct selname));
+
+ new->next = selname_chain;
+ new->msglist_len = msglist_len;
+ new->msglist_sel = msglist_sel;
+ msglist_len = 0;
+ msglist_sel = (char *)xmalloc(1);
+ *msglist_sel = 0;
+ selname_chain = new;
+}
+
+void
+add_msglist(struct stoken *str, int addcolon)
+{
+ char *s, *p;
+ int len, plen;
+
+ if (str == 0) { /* unnamed arg, or... */
+ if (addcolon == 0) { /* variable number of args */
+ msglist_len++;
+ return;
+ }
+ p = "";
+ plen = 0;
+ } else {
+ p = str->ptr;
+ plen = str->length;
+ }
+ len = plen + strlen(msglist_sel) + 2;
+ s = (char *)xmalloc(len);
+ strcpy(s, msglist_sel);
+ strncat(s, p, plen);
+ free(msglist_sel);
+ msglist_sel = s;
+ if (addcolon) {
+ s[len-2] = ':';
+ s[len-1] = 0;
+ msglist_len++;
+ } else
+ s[len-2] = '\0';
+}
+
+int
+end_msglist(void)
+{
+ register int val = msglist_len;
+ register struct selname *sel = selname_chain;
+ register char *p = msglist_sel;
+ int selid;
+
+ selname_chain = sel->next;
+ msglist_len = sel->msglist_len;
+ msglist_sel = sel->msglist_sel;
+ selid = lookup_child_selector(p);
+ if (!selid)
+ error("Can't find selector \"%s\"", p);
+ write_exp_elt_longcst (selid);
+ free(p);
+ write_exp_elt_longcst (val);/* Number of args */
+ free(sel);
+
+ return val;
+}
+
+/*
+ * Function: specialcmp (char *a, char *b)
+ *
+ * Special strcmp: treats ']' and ' ' as end-of-string.
+ * Used for qsorting lists of objc methods (either by class or selector)
+ */
+
+int specialcmp(char *a, char *b)
+{
+ while (*a && *a != ' ' && *a != ']' && *b && *b != ' ' && *b != ']')
+ {
+ if (*a != *b)
+ return *a - *b;
+ a++, b++;
+ }
+ if (*a && *a != ' ' && *a != ']')
+ return 1; /* a is longer therefore greater */
+ if (*b && *b != ' ' && *b != ']')
+ return -1; /* a is shorter therefore lesser */
+ return 0; /* a and b are identical */
+}
+
+/*
+ * Function: compare_selectors (void *, void *)
+ *
+ * Comparison function for use with qsort. Arguments are symbols or msymbols
+ * Compares selector part of objc method name alphabetically.
+ */
+
+static int
+compare_selectors (a, b)
+ void *a;
+ void *b;
+{
+ char *aname, *bname;
+
+ if ((aname = SYMBOL_SOURCE_NAME (*(struct symbol **) a)) == NULL ||
+ (bname = SYMBOL_SOURCE_NAME (*(struct symbol **) b)) == NULL)
+ error ("internal: compare_selectors(1)");
+
+ if ((aname = strchr(aname, ' ')) == NULL ||
+ (bname = strchr(bname, ' ')) == NULL)
+ error ("internal: compare_selectors(2)");
+
+ return specialcmp (aname+1, bname+1);
+}
+
+/*
+ * Function: selectors_info (regexp, from_tty)
+ *
+ * Implements the "Info selectors" command. Takes an optional regexp arg.
+ * Lists all objective c selectors that match the regexp. Works by
+ * grepping thru all symbols for objective c methods. Output list is
+ * sorted and uniqued.
+ */
+
+static void
+selectors_info (char *regexp, int from_tty)
+{
+ struct objfile *objfile;
+ struct minimal_symbol *msymbol;
+ char *name;
+ char *val;
+ int matches = 0;
+ int maxlen = 0;
+ int ix;
+ char myregexp[2048];
+ char asel[256];
+ struct symbol **sym_arr;
+ int plusminus = 0;
+
+ if (regexp == NULL)
+ strcpy(myregexp, ".*]"); /* null input, match all objc methods */
+ else
+ {
+ if (*regexp == '+' || *regexp == '-') /* if regexp starts with +/- */
+ { /* user wants only class methods or only instance methods */
+ plusminus = *regexp++;
+ while (*regexp == ' ' || *regexp == '\t')
+ regexp++;
+ }
+ if (*regexp == '\0')
+ strcpy(myregexp, ".*]");
+ else
+ {
+ strcpy(myregexp, regexp);
+ if (myregexp[strlen(myregexp) - 1] == '$') /* end of selector */
+ myregexp[strlen(myregexp) - 1] = ']'; /* end of method name */
+ else
+ strcat(myregexp, ".*]");
+ }
+ }
+
+ if (regexp != NULL)
+ if (0 != (val = re_comp (myregexp)))
+ error ("Invalid regexp (%s): %s", val, regexp);
+
+ /* first time thru is JUST to get max length and count */
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (msymbol)) == NULL)
+ name = SYMBOL_NAME (msymbol);
+ if (name &&
+ (name[0] == '-' || name[0] == '+') &&
+ name[1] == '[') /* got a method name */
+ {
+ if (plusminus && name[0] != plusminus)
+ continue; /* filter for class/instance methods */
+ name = (char *) strchr(name+2, ' '); /* find selector part */
+ if (regexp == NULL || re_exec(++name) != 0)
+ {
+ char *mystart = name;
+ char *myend = (char *) strchr(mystart, ']');
+
+ if (myend && (myend - mystart > maxlen))
+ maxlen = myend - mystart; /* get longest selector */
+ matches++;
+ }
+ }
+ }
+ if (matches)
+ {
+ printf_filtered ("Selectors matching \"%s\":\n\n",
+ regexp ? regexp : "*");
+
+ sym_arr = alloca (matches * sizeof (struct symbol *));
+ matches = 0;
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (msymbol)) == NULL)
+ name = SYMBOL_NAME (msymbol);
+ if (name &&
+ (name[0] == '-' || name[0] == '+') &&
+ name[1] == '[') /* got a method name */
+ {
+ if (plusminus && name[0] != plusminus)
+ continue; /* filter for class/instance methods */
+ name = (char *) strchr(name+2, ' '); /* find selector part */
+ if (regexp == NULL || re_exec(++name) != 0)
+ sym_arr[matches++] = (struct symbol *) msymbol;
+ }
+ }
+
+ qsort (sym_arr, matches, sizeof (struct minimal_symbol *),
+ compare_selectors);
+ asel[0] = 0; /* to prevent compare on first iteration */
+ for (ix = 0; ix < matches; ix++) /* now do the output */
+ {
+ char *p = asel;
+
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (sym_arr[ix])) == NULL)
+ name = SYMBOL_NAME (sym_arr[ix]);
+ name = strchr (name, ' ') + 1;
+ if (p[0] && specialcmp(name, p) == 0)
+ continue; /* seen this one already (not unique) */
+
+ while (*name && *name != ']') /* copy selector part */
+ *p++ = *name++;
+ *p++ = '\0';
+ puts_filtered_tabular(asel, maxlen + 1, 0); /* print in columns */
+ }
+ begin_line();
+ }
+ else
+ printf_filtered ("No selectors matching \"%s\"\n", regexp ? regexp : "*");
+}
+
+/*
+ * Function: compare_classes (void *, void *)
+ *
+ * Comparison function for use with qsort. Arguments are symbols or msymbols
+ * Compares class part of objc method name alphabetically.
+ */
+
+static int
+compare_classes (a, b)
+ void *a;
+ void *b;
+{
+ char *aname, *bname;
+
+ if ((aname = SYMBOL_SOURCE_NAME (*(struct symbol **) a)) == NULL ||
+ (bname = SYMBOL_SOURCE_NAME (*(struct symbol **) b)) == NULL)
+ error ("internal: compare_classes(1)");
+
+ return specialcmp (aname+1, bname+1);
+}
+
+/*
+ * Function: classes_info(regexp, from_tty)
+ *
+ * Implements the "info classes" command for objective c classes.
+ * Lists all objective c classes that match the optional regexp.
+ * Works by grepping thru the list of objective c methods.
+ * List will be sorted and uniqued (since one class may have many methods).
+ * BUGS: will not list a class that has no methods.
+ */
+
+static void
+classes_info (char *regexp, int from_tty)
+{
+ struct objfile *objfile;
+ struct minimal_symbol *msymbol;
+ char *name;
+ char *val;
+ int matches = 0;
+ int maxlen = 0;
+ int ix;
+ char myregexp[2048];
+ char aclass[256];
+ struct symbol **sym_arr;
+
+ if (regexp == NULL)
+ strcpy(myregexp, ".* "); /* null input: match all objc classes */
+ else
+ {
+ strcpy(myregexp, regexp);
+ if (myregexp[strlen(myregexp) - 1] == '$')
+ /* in the method name, the end of the class name is marked by ' ' */
+ myregexp[strlen(myregexp) - 1] = ' ';
+ else
+ strcat(myregexp, ".* ");
+ }
+
+ if (regexp != NULL)
+ if (0 != (val = re_comp (myregexp)))
+ error ("Invalid regexp (%s): %s", val, regexp);
+
+ /* first time thru is JUST to get max length and count */
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (msymbol)) == NULL)
+ name = SYMBOL_NAME (msymbol);
+ if (name &&
+ (name[0] == '-' || name[0] == '+') &&
+ name[1] == '[') /* got a method name */
+ if (regexp == NULL || re_exec(name+2) != 0)
+ {
+ char *mystart = name + 2; /* compute length of classname part */
+ char *myend = (char *) strchr(mystart, ' ');
+
+ if (myend && (myend - mystart > maxlen))
+ maxlen = myend - mystart;
+ matches++;
+ }
+ }
+ if (matches)
+ {
+ printf_filtered ("Classes matching \"%s\":\n\n",
+ regexp ? regexp : "*");
+ sym_arr = alloca (matches * sizeof (struct symbol *));
+ matches = 0;
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (msymbol)) == NULL)
+ name = SYMBOL_NAME (msymbol);
+ if (name &&
+ (name[0] == '-' || name[0] == '+') &&
+ name[1] == '[') /* got a method name */
+ if (regexp == NULL || re_exec(name+2) != 0)
+ sym_arr[matches++] = (struct symbol *) msymbol;
+ }
+
+ qsort (sym_arr, matches, sizeof (struct minimal_symbol *),
+ compare_classes);
+ aclass[0] = 0; /* to prevent compare on first iteration */
+ for (ix = 0; ix < matches; ix++) /* now do the output */
+ {
+ char *p = aclass;
+
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (sym_arr[ix])) == NULL)
+ name = SYMBOL_NAME (sym_arr[ix]);
+ name += 2;
+ if (p[0] && specialcmp(name, p) == 0)
+ continue; /* seen this one already (not unique) */
+
+ while (*name && *name != ' ') /* copy class part of method name */
+ *p++ = *name++;
+ *p++ = '\0';
+ puts_filtered_tabular(aclass, maxlen + 1, 0); /* print in columns */
+ }
+ begin_line();
+ }
+ else
+ printf_filtered ("No classes matching \"%s\"\n", regexp ? regexp : "*");
+}
+
+/*
+ * Function: find_imps (char *selector, struct symbol **sym_arr)
+ *
+ * Input: a string representing a selector
+ * a pointer to an array of symbol pointers
+ * possibly a pointer to a symbol found by the caller.
+ *
+ * Output: number of methods that implement that selector.
+ * Side effects: The array of symbol pointers is filled with matching syms.
+ *
+ * By analogy with function "find_methods" (symtab.c), builds a list of
+ * symbols matching the ambiguous input, so that "decode_line_2" (symtab.c)
+ * can list them and ask the user to choose one or more. In this case the
+ * matches are objective c methods ("implementations") matching an objective
+ * c selector.
+ *
+ * Note that it is possible for a normal (c-style) function to have the
+ * same name as an objective c selector. To prevent the selector from
+ * eclipsing the function, we allow the caller (decode_line_1) to search
+ * for such a function first, and if it finds one, pass it in to us. We
+ * will then integrate it into the list. We also search for one here,
+ * among the minsyms.
+ *
+ * NOTE: if NUM_DEBUGGABLE is non-zero, the sym_arr will be
+ * divided into two parts: debuggable (struct symbol) syms,
+ * and non_debuggable (struct minimal_symbol) syms.
+ * The debuggable ones will come first, before NUM_DEBUGGABLE
+ * (which will thus be the index of the first non-debuggable one).
+ */
+
+/*
+ * Function: total_number_of_imps (char *selector);
+ *
+ * Input: a string representing a selector
+ * Output: number of methods that implement that selector.
+ *
+ * By analogy with function "total_number_of_methods", this allows
+ * decode_line_1 (symtab.c) to detect if there are objective c methods
+ * matching the input, and to allocate an array of pointers to them
+ * which can be manipulated by "decode_line_2" (also in symtab.c)
+ */
+
+char *
+parse_selector (char *method, char **selector)
+{
+ char *s1 = NULL;
+ char *s2 = NULL;
+ int found_quote = 0;
+
+ char *nselector = NULL;
+
+ CHECK (selector != NULL);
+
+ s1 = method;
+
+ while (isspace (*s1))
+ s1++;
+ if (*s1 == '\'')
+ {
+ found_quote = 1;
+ s1++;
+ }
+ while (isspace (*s1))
+ s1++;
+
+ nselector = s1;
+ s2 = s1;
+
+ for (;;) {
+ if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':'))
+ *s1++ = *s2;
+ else if (isspace (*s2))
+ ;
+ else if ((*s2 == '\0') || (*s2 == '\''))
+ break;
+ else
+ return NULL;
+ s2++;
+ }
+ *s1++ = '\0';
+
+ while (isspace (*s2))
+ s2++;
+ if (found_quote)
+ {
+ if (*s2 == '\'')
+ s2++;
+ while (isspace (*s2))
+ s2++;
+ }
+
+ if (selector != NULL)
+ *selector = nselector;
+
+ return s2;
+}
+
+char *
+parse_method (char *method, char *type, char **class, char **category,
+ char **selector)
+{
+ char *s1 = NULL;
+ char *s2 = NULL;
+ int found_quote = 0;
+
+ char ntype = '\0';
+ char *nclass = NULL;
+ char *ncategory = NULL;
+ char *nselector = NULL;
+
+ CHECK (type != NULL);
+ CHECK (class != NULL);
+ CHECK (category != NULL);
+ CHECK (selector != NULL);
+
+ s1 = method;
+
+ while (isspace (*s1))
+ s1++;
+ if (*s1 == '\'')
+ {
+ found_quote = 1;
+ s1++;
+ }
+ while (isspace (*s1))
+ s1++;
+
+ if ((s1[0] == '+') || (s1[0] == '-'))
+ ntype = *s1++;
+
+ while (isspace (*s1))
+ s1++;
+
+ if (*s1 != '[')
+ return NULL;
+ s1++;
+
+ nclass = s1;
+ while (isalnum (*s1) || (*s1 == '_'))
+ s1++;
+
+ s2 = s1;
+ while (isspace (*s2))
+ s2++;
+
+ if (*s2 == '(')
+ {
+ s2++;
+ while (isspace (*s2))
+ s2++;
+ ncategory = s2;
+ while (isalnum (*s2) || (*s2 == '_'))
+ s2++;
+ *s2++ = '\0';
+ }
+
+ /* truncate the class name now that we're not using the open paren */
+ *s1++ = '\0';
+
+ nselector = s2;
+ s1 = s2;
+
+ for (;;) {
+ if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':'))
+ *s1++ = *s2;
+ else if (isspace (*s2))
+ ;
+ else if (*s2 == ']')
+ break;
+ else
+ return NULL;
+ s2++;
+ }
+ *s1++ = '\0';
+ s2++;
+
+ while (isspace (*s2))
+ s2++;
+ if (found_quote)
+ {
+ if (*s2 != '\'')
+ return NULL;
+ s2++;
+ while (isspace (*s2))
+ s2++;
+ }
+
+ if (type != NULL)
+ *type = ntype;
+ if (class != NULL)
+ *class = nclass;
+ if (category != NULL)
+ *category = ncategory;
+ if (selector != NULL)
+ *selector = nselector;
+
+ return s2;
+}
+
+void
+find_methods (struct symtab *symtab,
+ char type, const char *class, const char *category,
+ const char *selector,
+ struct symbol **syms, unsigned int *nsym, unsigned int *ndebug)
+{
+ struct objfile *objfile = NULL;
+ struct minimal_symbol *msymbol = NULL;
+ struct block *block = NULL;
+ struct symbol *sym = NULL;
+
+ char *symname = NULL;
+
+ char ntype = '\0';
+ char *nclass = NULL;
+ char *ncategory = NULL;
+ char *nselector = NULL;
+
+ unsigned int csym = 0;
+ unsigned int cdebug = 0;
+
+ static char *tmp = NULL;
+ static unsigned int tmplen = 0;
+
+ CHECK (nsym != NULL);
+ CHECK (ndebug != NULL);
+
+ if (symtab)
+ block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), STATIC_BLOCK);
+
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ QUIT;
+
+ if ((msymbol->type != mst_text) && (msymbol->type != mst_file_text))
+ /* not a function or method */
+ continue;
+
+ if (symtab)
+ if ((SYMBOL_VALUE_ADDRESS (msymbol) < block->startaddr) ||
+ (SYMBOL_VALUE_ADDRESS (msymbol) >= block->endaddr))
+ /* not in the specified symtab */
+ continue;
+
+ symname = SYMBOL_DEMANGLED_NAME (msymbol);
+ if (symname == NULL)
+ symname = SYMBOL_NAME (msymbol);
+ if (symname == NULL)
+ continue;
+
+ if ((symname[0] != '-' && symname[0] != '+') || (symname[1] != '['))
+ /* not a method name */
+ continue;
+
+ while ((strlen (symname) + 1) >= tmplen)
+ {
+ tmplen = (tmplen == 0) ? 1024 : tmplen * 2;
+ tmp = xrealloc (tmp, tmplen);
+ }
+ strcpy (tmp, symname);
+
+ if (parse_method (tmp, &ntype, &nclass, &ncategory, &nselector) == NULL)
+ continue;
+
+ if ((type != '\0') && (ntype != type))
+ continue;
+
+ if ((class != NULL) && ((nclass == NULL) || (strcmp (class, nclass) != 0)))
+ continue;
+
+ if ((category != NULL) && ((ncategory == NULL) || (strcmp (category, ncategory) != 0)))
+ continue;
+
+ if ((selector != NULL) && ((nselector == NULL) || (strcmp (selector, nselector) != 0)))
+ continue;
+
+ sym = find_pc_function (SYMBOL_VALUE_ADDRESS (msymbol));
+ if (sym != NULL)
+ {
+ const char *newsymname = SYMBOL_DEMANGLED_NAME (sym);
+
+ if (newsymname == NULL)
+ newsymname = SYMBOL_NAME (sym);
+ if (strcmp (symname, newsymname) == 0)
+ {
+ /* found a high-level method sym: swap it into the
+ lower part of sym_arr (below num_debuggable) */
+ if (syms != NULL)
+ {
+ syms[csym] = syms[cdebug];
+ syms[cdebug] = sym;
+ }
+ csym++;
+ cdebug++;
+ }
+ else
+ {
+ warning ("debugging symbol \"%s\" does not match minimal symbol (\"%s\"); ignoring",
+ newsymname, symname);
+ if (syms != NULL)
+ syms[csym] = (struct symbol *) msymbol;
+ csym++;
+ }
+ }
+ else
+ {
+ /* found a non-debuggable method symbol */
+ if (syms != NULL)
+ syms[csym] = (struct symbol *) msymbol;
+ csym++;
+ }
+ }
+
+ if (nsym != NULL)
+ *nsym = csym;
+ if (ndebug != NULL)
+ *ndebug = cdebug;
+}
+
+char *find_imps (struct symtab *symtab, struct block *block,
+ char *method, struct symbol **syms, unsigned int *nsym,
+ unsigned int *ndebug)
+{
+ char type = '\0';
+ char *class = NULL;
+ char *category = NULL;
+ char *selector = NULL;
+
+ unsigned int csym = 0;
+ unsigned int cdebug = 0;
+
+ unsigned int ncsym = 0;
+ unsigned int ncdebug = 0;
+
+ char *buf = NULL;
+ char *tmp = NULL;
+
+ CHECK (nsym != NULL);
+ CHECK (ndebug != NULL);
+
+ if (nsym != NULL)
+ *nsym = 0;
+ if (ndebug != NULL)
+ *ndebug = 0;
+
+ buf = (char *) alloca (strlen (method) + 1);
+ strcpy (buf, method);
+ tmp = parse_method (buf, &type, &class, &category, &selector);
+
+ if (tmp == NULL) {
+
+ struct symtab *sym_symtab = NULL;
+ struct symbol *sym = NULL;
+ struct minimal_symbol *msym = NULL;
+
+ strcpy (buf, method);
+ tmp = parse_selector (buf, &selector);
+
+ if (tmp == NULL)
+ return NULL;
+
+ sym = lookup_symbol (selector, block, VAR_NAMESPACE, 0, &sym_symtab);
+ if (sym != NULL)
+ {
+ if (syms)
+ syms[csym] = sym;
+ csym++;
+ cdebug++;
+ }
+
+ if (sym == NULL)
+ msym = lookup_minimal_symbol (selector, 0, 0);
+
+ if (msym != NULL)
+ {
+ if (syms)
+ syms[csym] = msym;
+ csym++;
+ }
+ }
+
+ if (syms != NULL)
+ find_methods (symtab, type, class, category, selector, syms + csym, &ncsym, &ncdebug);
+ else
+ find_methods (symtab, type, class, category, selector, NULL, &ncsym, &ncdebug);
+
+ /* If we didn't find any methods, just return. */
+ if (ncsym == 0 && ncdebug == 0)
+ return method;
+
+ /* Take debug symbols from the second batch of symbols and swap them
+ * with debug symbols from the first batch. Repeat until either the
+ * second section is out of debug symbols or the first section is
+ * full of debug symbols. Either way we have all debug symbols
+ * packed to the beginning of the buffer. */
+
+ if (syms != NULL)
+ {
+ while ((cdebug < csym) && (ncdebug > 0))
+ {
+ struct symbol *s = NULL;
+
+ unsigned int i = cdebug; /* first non-debugging symbol */
+ unsigned int j = csym + ncdebug -1; /* last of second batch of debug symbols */
+
+ s = syms[j];
+ syms[j] = syms[i];
+ syms[i] = s;
+
+ /* We've moved a symbol from the second debug section to the first one. */
+ cdebug++;
+ ncdebug--;
+ }
+ }
+
+ csym += ncsym;
+ cdebug += ncdebug;
+
+ if (nsym != NULL)
+ *nsym = csym;
+ if (ndebug != NULL)
+ *ndebug = cdebug;
+
+ if (syms == NULL)
+ return method + (tmp - buf);
+
+ if (csym > 1)
+ {
+ /* sort debuggable symbols */
+ if (cdebug > 1)
+ qsort (syms, cdebug, sizeof (struct minimal_symbol *), compare_classes);
+
+ /* sort minimal_symbols */
+ if ((csym - cdebug) > 1)
+ qsort (&syms[cdebug], csym - cdebug, sizeof (struct minimal_symbol *), compare_classes);
+ }
+ syms[csym] = 0; /* terminate the sym_arr list */
+
+ return method + (tmp - buf);
+}
+
+void
+print_object_command (char *args, int from_tty)
+{
+ struct value *object, *function, *description;
+ CORE_ADDR string_addr;
+ int i = 0;
+ char c = -1;
+
+ if (!args || !*args)
+ error ("The 'print-object' command requires an argument (an Objective-C object)");
+
+ {
+ struct expression *expr = parse_expression (args);
+ register struct cleanup *old_chain = make_cleanup (free_current_contents, &expr);
+ int pc = 0;
+
+#if 1
+ object = expr->language_defn->evaluate_exp (builtin_type_void_data_ptr,
+ expr, &pc, EVAL_NORMAL);
+#else
+ object = evaluate_subexp (builtin_type_void_data_ptr, expr, &pc, EVAL_NORMAL);
+#endif
+ do_cleanups (old_chain);
+ }
+
+ if (!(function = find_function_in_inferior ("_NSPrintForDebugger")))
+ error ("Unable to locate _NSPrintForDebugger in child process");
+
+ description = call_function_by_hand (function, 1, &object);
+
+ if ((string_addr = value_as_long (description)) == 0)
+ error ("object returns null description");
+
+ read_memory (string_addr + i++, &c, 1);
+ if (c != '\0')
+ do
+ { /* read and print characters up to EOS */
+ QUIT;
+ printf_filtered ("%c", c);
+ read_memory (string_addr + i++, &c, 1);
+ } while (c != 0);
+ else
+ printf_filtered("<object returns empty description>");
+ printf_filtered ("\n");
+}
+
+/* The data structure 'methcalls' is used to detect method calls
+ * (thru ObjC runtime lib functions objc_msgSend, objc_msgSendSuper, etc.),
+ * and ultimately find the method being called.
+ */
+
+struct objc_methcall {
+ char *name;
+ CORE_ADDR (*stop_at) (CORE_ADDR); /* should return instance method to be called */
+ CORE_ADDR begin; /* start of pc range corresponding to method invocation */
+ CORE_ADDR end; /* end of pc range corresponding to method invocation */
+};
+
+static int resolve_msgsend PARAMS ((CORE_ADDR pc, CORE_ADDR *new_pc));
+static int resolve_msgsend_stret PARAMS ((CORE_ADDR pc, CORE_ADDR *new_pc));
+static int resolve_msgsend_super PARAMS ((CORE_ADDR pc, CORE_ADDR *new_pc));
+static int resolve_msgsend_super_stret PARAMS ((CORE_ADDR pc, CORE_ADDR *new_pc));
+
+static struct objc_methcall methcalls[] = {
+ { "_objc_msgSend", resolve_msgsend, 0, 0},
+ { "_objc_msgSend_stret", resolve_msgsend_stret, 0, 0},
+ { "_objc_msgSendSuper", resolve_msgsend_super, 0, 0},
+ { "_objc_msgSendSuper_stret", resolve_msgsend_super_stret, 0, 0},
+ { "_objc_getClass", NULL, 0, 0},
+ { "_objc_getMetaClass", NULL, 0, 0}
+};
+
+#define nmethcalls (sizeof (methcalls) / sizeof (methcalls[0]))
+
+/* The following function, "find_objc_msgsend", fills in the data structure
+ * "objc_msgs" by finding the addresses of each of the (currently four)
+ * functions that it holds (of which objc_msgSend is the first). This
+ * must be called each time symbols are loaded, in case the functions
+ * have moved for some reason.
+ */
+
+void
+find_objc_msgsend (void)
+{
+ unsigned int i;
+ for (i = 0; i < nmethcalls; i++) {
+
+ struct minimal_symbol *func;
+
+ /* try both with and without underscore */
+ func = lookup_minimal_symbol (methcalls[i].name, NULL, NULL);
+ if ((func == NULL) && (methcalls[i].name[0] == '_')) {
+ func = lookup_minimal_symbol (methcalls[i].name + 1, NULL, NULL);
+ }
+ if (func == NULL) {
+ methcalls[i].begin = 0;
+ methcalls[i].end = 0;
+ continue;
+ }
+
+ methcalls[i].begin = SYMBOL_VALUE_ADDRESS (func);
+ do {
+ methcalls[i].end = SYMBOL_VALUE_ADDRESS (++func);
+ } while (methcalls[i].begin == methcalls[i].end);
+ }
+}
+
+/* find_objc_msgcall (replaces pc_off_limits)
+ *
+ * ALL that this function now does is to determine whether the input
+ * address ("pc") is the address of one of the Objective C message
+ * dispatch functions (mainly objc_msgSend or objc_msgSendSuper), and
+ * if so, it returns the address of the method that will be called.
+ *
+ * The old function "pc_off_limits" used to do a lot of other things
+ * in addition, such as detecting shared library jump stubs and
+ * returning the address of the shlib function that would be called.
+ * That functionality has been moved into the SKIP_TRAMPOLINE_CODE
+ * and IN_SOLIB_TRAMPOLINE macros, which are resolved in the target-
+ * dependent modules.
+ */
+
+struct objc_submethod_helper_data {
+ CORE_ADDR (*f) (CORE_ADDR, CORE_ADDR *);
+ CORE_ADDR pc;
+ CORE_ADDR *new_pc;
+};
+
+int
+find_objc_msgcall_submethod_helper (PTR arg)
+{
+ struct objc_submethod_helper_data *s = (struct objc_submethod_helper_data *) arg;
+ if (s->f (s->pc, s->new_pc) == 0) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+int
+find_objc_msgcall_submethod (f, pc, new_pc)
+ CORE_ADDR (*f) (CORE_ADDR, CORE_ADDR *);
+ CORE_ADDR pc;
+ CORE_ADDR *new_pc;
+{
+ struct objc_submethod_helper_data s;
+
+ s.f = f;
+ s.pc = pc;
+ s.new_pc = new_pc;
+
+ if (catch_errors (find_objc_msgcall_submethod_helper,
+ (PTR) &s,
+ "Unable to determine target of Objective-C method call (ignoring):\n",
+ RETURN_MASK_ALL) == 0) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+int
+find_objc_msgcall (CORE_ADDR pc, CORE_ADDR *new_pc)
+{
+ unsigned int i;
+
+ find_objc_msgsend ();
+ if (new_pc != NULL) { *new_pc = 0; }
+
+ for (i = 0; i < nmethcalls; i++) {
+ if ((pc >= methcalls[i].begin) && (pc < methcalls[i].end)) {
+ if (methcalls[i].stop_at != NULL) {
+ return find_objc_msgcall_submethod (methcalls[i].stop_at, pc, new_pc);
+ } else {
+ return 0;
+ }
+ }
+ }
+ return 0;
+}
+
+void
+_initialize_objc_language (void)
+{
+ add_language (&objc_language_defn);
+ add_info ("selectors", selectors_info, /* INFO SELECTORS command */
+ "All Objective C selectors, or those matching REGEXP.");
+ add_info ("classes", classes_info, /* INFO CLASSES command */
+ "All Objective C classes, or those matching REGEXP.");
+ add_com ("print-object", class_vars, print_object_command,
+ "Ask an Objective-C object to print itself.\n");
+ add_com_alias ("po", "print-object", class_vars, 1);
+}
+
+#if defined (__powerpc__) || defined (__ppc__)
+static unsigned long FETCH_ARGUMENT (int i)
+{
+ return read_register (3 + i);
+}
+#elif defined (__i386__)
+static unsigned long FETCH_ARGUMENT (int i)
+{
+ CORE_ADDR stack = read_register (SP_REGNUM);
+ return read_memory_unsigned_integer (stack + (4 * (i + 1)), 4);
+}
+#elif defined (__sparc__)
+static unsigned long FETCH_ARGUMENT (int i)
+{
+ return read_register (O0_REGNUM + i);
+}
+#elif defined (__hppa__) || defined (__hppa)
+static unsigned long FETCH_ARGUMENT (int i)
+{
+ return read_register (R0_REGNUM + 26 - i);
+}
+#else
+#error unknown architecture
+#endif
+
+#if defined (__hppa__) || defined (__hppa)
+static CORE_ADDR CONVERT_FUNCPTR (CORE_ADDR pc)
+{
+ if (pc & 0x2) {
+ pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, 4);
+ }
+ return pc;
+}
+#else
+static CORE_ADDR CONVERT_FUNCPTR (CORE_ADDR pc)
+{
+ return pc;
+}
+#endif
+
+static void
+read_objc_method (CORE_ADDR addr, struct objc_method *method)
+{
+ method->name = read_memory_unsigned_integer (addr, 4);
+ method->types = read_memory_unsigned_integer (addr + 4, 4);
+ method->imp = read_memory_unsigned_integer (addr + 8, 4);
+}
+
+static
+unsigned long read_objc_methlist_nmethods (CORE_ADDR addr)
+{
+ return read_memory_unsigned_integer (addr + 4, 4);
+}
+
+static void
+read_objc_methlist_method (CORE_ADDR addr, unsigned long num,
+ struct objc_method *method)
+{
+ CHECK_FATAL (num < read_objc_methlist_nmethods (addr));
+ read_objc_method (addr + 8 + (12 * num), method);
+}
+
+static void
+read_objc_object (CORE_ADDR addr, struct objc_object *object)
+{
+ object->isa = read_memory_unsigned_integer (addr, 4);
+}
+
+static void
+read_objc_super (CORE_ADDR addr, struct objc_super *super)
+{
+ super->receiver = read_memory_unsigned_integer (addr, 4);
+ super->class = read_memory_unsigned_integer (addr + 4, 4);
+};
+
+static void
+read_objc_class (CORE_ADDR addr, struct objc_class *class)
+{
+ class->isa = read_memory_unsigned_integer (addr, 4);
+ class->super_class = read_memory_unsigned_integer (addr + 4, 4);
+ class->name = read_memory_unsigned_integer (addr + 8, 4);
+ class->version = read_memory_unsigned_integer (addr + 12, 4);
+ class->info = read_memory_unsigned_integer (addr + 16, 4);
+ class->instance_size = read_memory_unsigned_integer (addr + 18, 4);
+ class->ivars = read_memory_unsigned_integer (addr + 24, 4);
+ class->methods = read_memory_unsigned_integer (addr + 28, 4);
+ class->cache = read_memory_unsigned_integer (addr + 32, 4);
+ class->protocols = read_memory_unsigned_integer (addr + 36, 4);
+}
+
+CORE_ADDR
+find_implementation_from_class (CORE_ADDR class, CORE_ADDR sel)
+{
+ CORE_ADDR subclass = class;
+
+ while (subclass != 0) {
+
+ struct objc_class class_str;
+ unsigned mlistnum = 0;
+
+ read_objc_class (subclass, &class_str);
+
+ for (;;) {
+ CORE_ADDR mlist;
+ unsigned long nmethods;
+ unsigned long i;
+
+ mlist = read_memory_unsigned_integer (class_str.methods + (4 * mlistnum), 4);
+ if (mlist == 0) { break; }
+
+ nmethods = read_objc_methlist_nmethods (mlist);
+
+ for (i = 0; i < nmethods; i++) {
+ struct objc_method meth_str;
+ read_objc_methlist_method (mlist, i, &meth_str);
+
+#if 0
+ fprintf (stderr, "checking method 0x%lx against selector 0x%lx\n", meth_str.name, sel);
+#endif
+
+ if (meth_str.name == sel) {
+ return CONVERT_FUNCPTR (meth_str.imp);
+ }
+ }
+
+ mlistnum++;
+ }
+
+ subclass = class_str.super_class;
+ }
+
+ return 0;
+}
+
+CORE_ADDR
+find_implementation (CORE_ADDR object, CORE_ADDR sel)
+{
+ struct objc_object ostr;
+
+ if (object == 0) { return 0; }
+ read_objc_object (object, &ostr);
+ if (ostr.isa == 0) { return 0; }
+
+ return find_implementation_from_class (ostr.isa, sel);
+}
+
+static int
+resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc)
+{
+ CORE_ADDR object;
+ CORE_ADDR sel;
+ CORE_ADDR res;
+
+ object = FETCH_ARGUMENT (0);
+ sel = FETCH_ARGUMENT (1);
+
+ res = find_implementation (object, sel);
+ if (new_pc != 0) { *new_pc = res; }
+ if (res == 0) { return 1; }
+ return 0;
+}
+
+static int
+resolve_msgsend_stret (CORE_ADDR pc, CORE_ADDR *new_pc)
+{
+ CORE_ADDR object;
+ CORE_ADDR sel;
+ CORE_ADDR res;
+
+ object = FETCH_ARGUMENT (1);
+ sel = FETCH_ARGUMENT (2);
+
+ res = find_implementation (object, sel);
+ if (new_pc != 0) { *new_pc = res; }
+ if (res == 0) { return 1; }
+ return 0;
+}
+
+static int
+resolve_msgsend_super (CORE_ADDR pc, CORE_ADDR *new_pc)
+{
+ struct objc_super sstr;
+
+ CORE_ADDR super;
+ CORE_ADDR sel;
+ CORE_ADDR res;
+
+ super = FETCH_ARGUMENT (0);
+ sel = FETCH_ARGUMENT (1);
+
+ read_objc_super (super, &sstr);
+ if (sstr.class == 0) { return 0; }
+
+ res = find_implementation_from_class (sstr.class, sel);
+ if (new_pc != 0) { *new_pc = res; }
+ if (res == 0) { return 1; }
+ return 0;
+}
+
+static int
+resolve_msgsend_super_stret (CORE_ADDR pc, CORE_ADDR *new_pc)
+{
+ struct objc_super sstr;
+
+ CORE_ADDR super;
+ CORE_ADDR sel;
+ CORE_ADDR res;
+
+ super = FETCH_ARGUMENT (1);
+ sel = FETCH_ARGUMENT (2);
+
+ read_objc_super (super, &sstr);
+ if (sstr.class == 0) { return 0; }
+
+ res = find_implementation_from_class (sstr.class, sel);
+ if (new_pc != 0) { *new_pc = res; }
+ if (res == 0) { return 1; }
+ return 0;
+}
generated by cgit v1.1 at 2024-12-17 19:40:06 +0000