#include "defs.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "parser-defs.h"
#include "language.h"
#include "c-lang.h"
#include "objc-lang.h"
#include "exceptions.h"
#include "complaints.h"
#include "value.h"
#include "symfile.h"
#include "objfiles.h"
#include "gdb_string.h"
#include "target.h"
#include "gdbcore.h"
#include "gdbcmd.h"
#include "frame.h"
#include "gdb_regex.h"
#include "regcache.h"
#include "block.h"
#include "infcall.h"
#include "valprint.h"
#include "gdb_assert.h"
#include "inferior.h"
#include "demangle.h"
#include "osabi.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;
};
static 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);
int lookup_objc_class_p = 1;
int call_po_at_unsafe_times = 0;
static int
get_addrsize (void)
{
if (exec_bfd && gdbarch_lookup_osabi (exec_bfd) == GDB_OSABI_DARWIN64)
return 8;
else
return 4;
}
struct symbol *
lookup_struct_typedef (char *name, struct block *block, int noerr)
{
struct symbol *sym;
sym = lookup_symbol (name, block, STRUCT_DOMAIN, 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)
{
static struct cached_value *function = NULL;
struct value *classval;
struct value *retval;
if (! target_has_execution)
{
return 0;
}
if (function == NULL)
{
if (lookup_minimal_symbol("objc_lookUpClass", 0, 0))
function = create_cached_function ("objc_lookUpClass",
builtin_type_voidptrfuncptr);
else if (lookup_minimal_symbol ("objc_lookup_class", 0, 0))
function = create_cached_function ("objc_lookup_class",
builtin_type_voidptrfuncptr);
else
return 0;
}
classval = value_string (classname, strlen (classname) + 1);
classval = value_coerce_array (classval);
retval = call_function_by_hand (lookup_cached_function (function),
1, &classval);
return (CORE_ADDR) value_as_long (retval);
}
CORE_ADDR
lookup_child_selector_nocache (char *selname)
{
static struct cached_value *function = NULL;
struct value *selstring;
struct value *retval;
if (! target_has_execution)
{
return 0;
}
if (function == NULL)
{
if (lookup_minimal_symbol("sel_getUid", 0, 0))
function = create_cached_function ("sel_getUid",
builtin_type_voidptrfuncptr);
else if (lookup_minimal_symbol ("sel_get_any_uid", 0, 0))
function = create_cached_function ("sel_get_any_uid",
builtin_type_voidptrfuncptr);
else
{
complaint (&symfile_complaints, "no way to lookup Objective-C selectors");
return 0;
}
}
selstring = value_coerce_array (value_string (selname,
strlen (selname) + 1));
retval = call_function_by_hand (lookup_cached_function (function),
1, &selstring);
return value_as_long (retval);
}
struct selector_entry {
char *name;
CORE_ADDR val;
struct selector_entry *next;
};
#define SELECTOR_HASH_SIZE 127
static struct selector_entry *selector_hash[SELECTOR_HASH_SIZE] = { 0 };
static int selector_hash_generation = -1;
static void
reset_child_selector_cache (void)
{
int i;
for (i = 0; i < SELECTOR_HASH_SIZE; i++)
{
struct selector_entry *entry, *temp;
entry = selector_hash[i];
while (entry != NULL)
{
temp = entry;
entry = entry->next;
xfree (temp->name);
xfree (temp);
}
selector_hash[i] = NULL;
}
}
CORE_ADDR
lookup_child_selector (char *selname)
{
struct selector_entry *entry;
int hash;
int current_generation;
current_generation = ptid_get_pid (inferior_ptid);
if (current_generation != selector_hash_generation)
{
reset_child_selector_cache ();
selector_hash_generation = current_generation;
}
hash = msymbol_hash (selname) % SELECTOR_HASH_SIZE;
for (entry = selector_hash[hash]; entry != NULL; entry = entry->next)
if ((entry != NULL) && (strcmp (entry->name, selname) == 0))
break;
if (entry != NULL)
return entry->val;
entry = (struct selector_entry *) xmalloc (sizeof (struct selector_entry));
entry->name = xstrdup (selname);
entry->val = lookup_child_selector_nocache (selname);
entry->next = selector_hash[hash];
selector_hash[hash] = entry;
return entry->val;
}
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;
sym = lookup_struct_typedef("NSString", 0, 1);
if (sym == NULL)
sym = lookup_struct_typedef("NXString", 0, 1);
if (sym == NULL)
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]);
if (lookup_minimal_symbol("_NSNewStringFromCString", 0, 0))
{
function = find_function_in_inferior("_NSNewStringFromCString",
builtin_type_voidptrfuncptr);
nsstringValue = call_function_by_hand(function, 1, &stringValue[2]);
}
else if (lookup_minimal_symbol("istr", 0, 0))
{
function = find_function_in_inferior("istr",
builtin_type_voidptrfuncptr);
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:]",
builtin_type_voidptrfuncptr);
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"));
deprecated_set_value_type (nsstringValue, type);
return nsstringValue;
}
char *
objcplus_demangle (const char *mangled, int options)
{
char *demangled;
demangled = objc_demangle (mangled, options);
if (demangled != NULL)
return demangled;
demangled = cplus_demangle (mangled, options);
return demangled;
}
char *
objc_demangle (const char *mangled, int options)
{
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++ = '-';
else
*cp++ = '+';
*cp++ = '[';
strcpy(cp, mangled+3);
while (*cp && *cp == '_')
cp++;
cp = strchr(cp, '_');
if (!cp)
{
xfree(demangled);
return NULL;
}
if (cp[1] == '_') {
*cp++ = ' ';
strcpy(cp, mangled + (cp - demangled) + 2);
}
else {
*cp++ = '(';
cp = strchr(cp, '_');
if (!cp)
{
xfree(demangled);
return NULL;
}
*cp++ = ')';
*cp++ = ' ';
strcpy(cp, mangled + (cp - demangled));
}
while (*cp && *cp == '_')
cp++;
for (; *cp; cp++)
if (*cp == '_')
*cp = ':';
*cp++ = ']';
*cp++ = 0;
return demangled;
}
else
return NULL;
}
static void
objc_emit_char (int c, struct ui_file *stream, int quoter)
{
c &= 0xFF;
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);
}
static void
objc_printstr (struct ui_file *stream, const gdb_byte *string,
unsigned int length, int width, int force_ellipses)
{
unsigned int i;
unsigned int things_printed = 0;
int in_quotes = 0;
int need_comma = 0;
if ((!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)
{
unsigned int rep1;
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;
}
}
if (in_quotes)
{
if (inspect_it)
fputs_filtered ("\\\"", stream);
else
fputs_filtered ("\"", stream);
}
if (force_ellipses || i < length)
fputs_filtered ("...", stream);
}
static struct type *
objc_create_fundamental_type (struct objfile *objfile, int typeid)
{
struct type *type = NULL;
switch (typeid)
{
default:
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);
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);
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);
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);
}
static CORE_ADDR
objc_skip_trampoline (CORE_ADDR stop_pc)
{
CORE_ADDR real_stop_pc;
CORE_ADDR method_stop_pc;
real_stop_pc = SKIP_TRAMPOLINE_CODE (stop_pc);
if (real_stop_pc != 0)
find_objc_msgcall (real_stop_pc, &method_stop_pc);
else
find_objc_msgcall (stop_pc, &method_stop_pc);
if (method_stop_pc)
{
real_stop_pc = SKIP_TRAMPOLINE_CODE (method_stop_pc);
if (real_stop_pc == 0)
real_stop_pc = method_stop_pc;
}
return real_stop_pc;
}
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, OP_NULL, PREC_NULL, 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_objc,
objc_builtin_types,
range_check_off,
type_check_off,
case_sensitive_on,
array_row_major,
&exp_descriptor_standard,
objc_parse,
objc_error,
null_post_parser,
objc_printchar,
objc_printstr,
objc_emit_char,
objc_create_fundamental_type,
c_print_type,
c_val_print,
c_value_print,
objc_skip_trampoline,
value_of_this,
basic_lookup_symbol_nonlocal,
basic_lookup_transparent_type,
objc_demangle,
NULL,
objc_op_print_tab,
1,
0,
&builtin_type_char,
default_word_break_characters,
NULL,
LANG_MAGIC
};
const struct language_defn objcplus_language_defn = {
"objective-c++",
language_objcplus,
objc_builtin_types,
range_check_off,
type_check_off,
case_sensitive_on,
array_row_major,
&exp_descriptor_standard,
objc_parse,
objc_error,
null_post_parser,
objc_printchar,
objc_printstr,
objc_emit_char,
objc_create_fundamental_type,
c_print_type,
c_val_print,
c_value_print,
objc_skip_trampoline,
value_of_this,
basic_lookup_symbol_nonlocal,
basic_lookup_transparent_type,
objcplus_demangle,
NULL,
objc_op_print_tab,
1,
0,
&builtin_type_char,
default_word_break_characters,
NULL,
LANG_MAGIC
};
struct selname
{
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)
{
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) {
if (addcolon == 0) {
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);
xfree(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)
{
int val = msglist_len;
struct selname *sel = selname_chain;
char *p = msglist_sel;
CORE_ADDR 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);
xfree(p);
write_exp_elt_longcst (val);
xfree(sel);
return val;
}
static 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;
if (*b && *b != ' ' && *b != ']')
return -1;
return 0;
}
static int
compare_selectors (const void *a, const void *b)
{
char *aname, *bname;
aname = SYMBOL_PRINT_NAME (*(struct symbol **) a);
bname = SYMBOL_PRINT_NAME (*(struct symbol **) b);
if (aname == NULL || bname == NULL)
error (_("internal: compare_selectors(1)"));
aname = strchr(aname, ' ');
bname = strchr(bname, ' ');
if (aname == NULL || bname == NULL)
error (_("internal: compare_selectors(2)"));
return specialcmp (aname+1, bname+1);
}
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, ".*]");
else
{
if (*regexp == '+' || *regexp == '-')
{
plusminus = *regexp++;
while (*regexp == ' ' || *regexp == '\t')
regexp++;
}
if (*regexp == '\0')
strcpy(myregexp, ".*]");
else
{
strcpy(myregexp, regexp);
if (myregexp[strlen(myregexp) - 1] == '$')
myregexp[strlen(myregexp) - 1] = ']';
else
strcat(myregexp, ".*]");
}
}
if (regexp != NULL)
{
val = re_comp (myregexp);
if (val != 0)
error (_("Invalid regexp (%s): %s"), val, regexp);
}
ALL_MSYMBOLS (objfile, msymbol)
{
QUIT;
name = SYMBOL_NATURAL_NAME (msymbol);
if (name &&
(name[0] == '-' || name[0] == '+') &&
name[1] == '[')
{
if (plusminus && name[0] != plusminus)
continue;
name = (char *) strchr(name+2, ' ');
if (regexp == NULL || re_exec(++name) != 0)
{
char *mystart = name;
char *myend = (char *) strchr(mystart, ']');
if (myend && (myend - mystart > maxlen))
maxlen = myend - mystart;
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;
name = SYMBOL_NATURAL_NAME (msymbol);
if (name &&
(name[0] == '-' || name[0] == '+') &&
name[1] == '[')
{
if (plusminus && name[0] != plusminus)
continue;
name = (char *) strchr(name+2, ' ');
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;
for (ix = 0; ix < matches; ix++)
{
char *p = asel;
QUIT;
name = SYMBOL_NATURAL_NAME (sym_arr[ix]);
name = strchr (name, ' ') + 1;
if (p[0] && specialcmp(name, p) == 0)
continue;
while (*name && *name != ']')
*p++ = *name++;
*p++ = '\0';
puts_filtered_tabular(asel, maxlen + 1, 0);
}
begin_line();
}
else
printf_filtered (_("No selectors matching \"%s\"\n"), regexp ? regexp : "*");
}
static int
compare_classes (const void *a, const void *b)
{
char *aname, *bname;
aname = SYMBOL_PRINT_NAME (*(struct symbol **) a);
bname = SYMBOL_PRINT_NAME (*(struct symbol **) b);
if (aname == NULL || bname == NULL)
error (_("internal: compare_classes(1)"));
return specialcmp (aname+1, bname+1);
}
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, ".* ");
else
{
strcpy(myregexp, regexp);
if (myregexp[strlen(myregexp) - 1] == '$')
myregexp[strlen(myregexp) - 1] = ' ';
else
strcat(myregexp, ".* ");
}
if (regexp != NULL)
{
val = re_comp (myregexp);
if (val != 0)
error (_("Invalid regexp (%s): %s"), val, regexp);
}
ALL_MSYMBOLS (objfile, msymbol)
{
QUIT;
name = SYMBOL_NATURAL_NAME (msymbol);
if (name &&
(name[0] == '-' || name[0] == '+') &&
name[1] == '[')
if (regexp == NULL || re_exec(name+2) != 0)
{
char *mystart = name + 2;
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;
name = SYMBOL_NATURAL_NAME (msymbol);
if (name &&
(name[0] == '-' || name[0] == '+') &&
name[1] == '[')
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;
for (ix = 0; ix < matches; ix++)
{
char *p = aclass;
QUIT;
name = SYMBOL_NATURAL_NAME (sym_arr[ix]);
name += 2;
if (p[0] && specialcmp(name, p) == 0)
continue;
while (*name && *name != ' ')
*p++ = *name++;
*p++ = '\0';
puts_filtered_tabular(aclass, maxlen + 1, 0);
}
begin_line();
}
else
printf_filtered (_("No classes matching \"%s\"\n"), regexp ? regexp : "*");
}
char *
parse_selector (char *method, char **selector)
{
char *s1 = NULL;
char *s2 = NULL;
int found_quote = 0;
char *nselector = NULL;
gdb_assert (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;
gdb_assert (type != NULL);
gdb_assert (class != NULL);
gdb_assert (category != NULL);
gdb_assert (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';
}
*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;
}
static 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;
struct cleanup * old_list = NULL;
char *symname = NULL;
char ntype = '\0';
char *nclass = NULL;
char *ncategory = NULL;
char *nselector = NULL;
char *name_end = NULL;
unsigned int csym = 0;
unsigned int cdebug = 0;
static char *tmp = NULL;
static unsigned int tmplen = 0;
gdb_assert (nsym != NULL);
gdb_assert (ndebug != NULL);
if (symtab)
block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), STATIC_BLOCK);
ALL_MSYMBOLS (objfile, msymbol)
{
QUIT;
if (MSYMBOL_OBSOLETED (msymbol))
continue;
if ((msymbol->type != mst_text) && (msymbol->type != mst_file_text))
continue;
if (symtab)
if ((SYMBOL_VALUE_ADDRESS (msymbol) < BLOCK_START (block)) ||
(SYMBOL_VALUE_ADDRESS (msymbol) >= BLOCK_END (block)))
continue;
symname = SYMBOL_NATURAL_NAME (msymbol);
if (symname == NULL)
continue;
if ((symname[0] != '-' && symname[0] != '+') || (symname[1] != '['))
continue;
while ((strlen (symname) + 1) >= tmplen)
{
tmplen = (tmplen == 0) ? 1024 : tmplen * 2;
tmp = xrealloc (tmp, tmplen);
}
strcpy (tmp, symname);
name_end = parse_method (tmp, &ntype, &nclass, &ncategory, &nselector);
if (name_end == NULL || *name_end != '\0')
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;
if (objfile->separate_debug_objfile)
{
old_list =
make_cleanup_restrict_to_objfile (objfile->separate_debug_objfile);
sym = find_pc_sect_function (SYMBOL_VALUE_ADDRESS (msymbol),
SYMBOL_BFD_SECTION (msymbol));
do_cleanups (old_list);
}
if (sym == NULL)
{
old_list = make_cleanup_restrict_to_objfile (objfile);
sym = find_pc_sect_function (SYMBOL_VALUE_ADDRESS (msymbol),
SYMBOL_BFD_SECTION (msymbol));
do_cleanups (old_list);
}
if (sym != NULL)
{
const char *newsymname = SYMBOL_NATURAL_NAME (sym);
if (strcmp (symname, newsymname) == 0)
{
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
{
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;
gdb_assert (nsym != NULL);
gdb_assert (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 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_DOMAIN, 0, NULL);
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] = (struct symbol *)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 (ncsym == 0 && ncdebug == 0)
return method;
if (syms != NULL)
{
while ((cdebug < csym) && (ncdebug > 0))
{
struct symbol *s = NULL;
unsigned int i = cdebug;
unsigned int j = csym + ncdebug - 1;
s = syms[j];
syms[j] = syms[i];
syms[i] = s;
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)
{
if (cdebug > 1)
qsort (syms, cdebug, sizeof (struct minimal_symbol *),
compare_classes);
if ((csym - cdebug) > 1)
qsort (&syms[cdebug], csym - cdebug,
sizeof (struct minimal_symbol *), compare_classes);
}
syms[csym] = 0;
return method + (tmp - buf);
}
static void
print_object_command (char *args, int from_tty)
{
struct value *object, *function, *description;
struct cleanup *cleanup_chain;
int unwind;
CORE_ADDR string_addr, object_addr;
int i = 0;
gdb_byte c = 0;
const char *fn_name;
if (!args || !*args)
error (
"The 'print-object' command requires an argument (an Objective-C object)");
if (!call_po_at_unsafe_times)
{
if (target_check_safe_call () == 0)
{
warning ("Set call-po-at-unsafe-times to 1 to override this check.");
return;
}
}
{
struct expression *expr = parse_expression (args);
struct cleanup *old_chain =
make_cleanup (free_current_contents, &expr);
int pc = 0;
object = expr->language_defn->la_exp_desc->evaluate_exp
(builtin_type_void_data_ptr, expr, &pc, EVAL_NORMAL);
do_cleanups (old_chain);
}
if (object != NULL && TYPE_CODE (value_type (object)) == TYPE_CODE_ERROR)
{
struct type *id_type;
id_type = lookup_typename ("id", NULL, 1);
if (id_type)
object = value_cast (id_type, object);
}
object_addr = value_as_address (object);
read_memory (object_addr, &c, 1);
fn_name = "_NSPrintForDebugger";
if (lookup_minimal_symbol (fn_name, NULL, NULL) == NULL)
{
fn_name = "_CFPrintForDebugger";
if (lookup_minimal_symbol (fn_name, NULL, NULL) == NULL)
error (_("Unable to locate _NSPrintForDebugger or _CFPrintForDebugger "
"in child process"));
}
function = find_function_in_inferior (fn_name,
builtin_type_voidptrfuncptr);
if (function == NULL)
error (_("Unable to locate _NSPrintForDebugger or _CFPrintForDebugger in "
"child process"));
unwind = set_unwind_on_signal (1);
cleanup_chain = make_cleanup (set_unwind_on_signal, unwind);
description = call_function_by_hand (function, 1, &object);
do_cleanups (cleanup_chain);
string_addr = value_as_address (description);
if (string_addr == 0)
error (_("object returns null description"));
read_memory (string_addr + i++, &c, 1);
if (c != 0)
do
{
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");
}
struct objc_methcall {
char *name;
int (*stop_at) (CORE_ADDR, CORE_ADDR *);
CORE_ADDR begin;
CORE_ADDR end;
};
static int resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc);
static int resolve_msgsend_stret (CORE_ADDR pc, CORE_ADDR *new_pc);
static int resolve_msgsend_super (CORE_ADDR pc, CORE_ADDR *new_pc);
static int resolve_msgsend_super_stret (CORE_ADDR pc, CORE_ADDR *new_pc);
static struct objc_methcall methcalls[] = {
{ "_objc_msgSend", resolve_msgsend, 0, 0},
{ "_objc_msgSend_rtp", 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]))
static int cached_objc_msgsend_table_is_valid = 0;
static void
find_objc_msgsend (void)
{
unsigned int i;
if (cached_objc_msgsend_table_is_valid)
return;
for (i = 0; i < nmethcalls; i++)
{
struct minimal_symbol *func, *orig_func;
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);
orig_func = func;
do {
methcalls[i].end = SYMBOL_VALUE_ADDRESS (++func);
} while (methcalls[i].begin == methcalls[i].end);
if (methcalls[i].end == 0 && orig_func->ginfo.bfd_section != NULL)
{
methcalls[i].end = orig_func->ginfo.bfd_section->lma
+ orig_func->ginfo.bfd_section->size;
}
}
cached_objc_msgsend_table_is_valid = 1;
}
void
tell_objc_msgsend_cacher_objfile_changed (struct objfile *obj __attribute__ ((__unused__)))
{
cached_objc_msgsend_table_is_valid = 0;
}
struct objc_submethod_helper_data {
int (*f) (CORE_ADDR, CORE_ADDR *);
CORE_ADDR pc;
CORE_ADDR *new_pc;
};
static int
find_objc_msgcall_submethod_helper (void * 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;
}
static int
find_objc_msgcall_submethod (int (*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,
(void *) &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;
}
extern initialize_file_ftype _initialize_objc_language;
void
_initialize_objc_language (void)
{
add_language (&objc_language_defn);
add_language (&objcplus_language_defn);
add_info ("selectors", selectors_info,
_("All Objective-C selectors, or those matching REGEXP."));
add_info ("classes", classes_info,
_("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."));
add_com_alias ("po", "print-object", class_vars, 1);
}
static void
read_objc_method (CORE_ADDR addr, struct objc_method *method)
{
int addrsize = get_addrsize ();
method->name = read_memory_unsigned_integer (addr + 0, addrsize);
method->types = read_memory_unsigned_integer (addr + addrsize, addrsize);
method->imp = read_memory_unsigned_integer (addr + addrsize * 2, addrsize);
}
static unsigned long
read_objc_method_list_nmethods (CORE_ADDR addr)
{
int addrsize = get_addrsize ();
return read_memory_unsigned_integer (addr + addrsize, 4);
}
static void
read_objc_method_list_method (CORE_ADDR addr, unsigned long num,
struct objc_method *method)
{
int addrsize = get_addrsize ();
int offset;
if (addrsize == 8)
offset = addrsize + 4 + 4;
else
offset = addrsize + 4;
gdb_assert (num < read_objc_method_list_nmethods (addr));
read_objc_method (addr + offset + (3 * addrsize * num), method);
}
static void
read_objc_object (CORE_ADDR addr, struct objc_object *object)
{
int addrsize = get_addrsize ();
object->isa = read_memory_unsigned_integer (addr, addrsize);
}
static void
read_objc_super (CORE_ADDR addr, struct objc_super *super)
{
int addrsize = get_addrsize ();
super->receiver = read_memory_unsigned_integer (addr, addrsize);
super->class = read_memory_unsigned_integer (addr + addrsize, addrsize);
};
static void
read_objc_class (CORE_ADDR addr, struct objc_class *class)
{
int addrsize = get_addrsize ();
class->isa = read_memory_unsigned_integer (addr, addrsize);
class->super_class = read_memory_unsigned_integer (addr + addrsize, addrsize);
class->name = read_memory_unsigned_integer (addr + addrsize * 2, addrsize);
class->version = read_memory_unsigned_integer (addr + addrsize * 3, addrsize);
class->info = read_memory_unsigned_integer (addr + addrsize * 4, addrsize);
class->instance_size = read_memory_unsigned_integer
(addr + addrsize * 5, addrsize);
class->ivars = read_memory_unsigned_integer (addr + addrsize * 6, addrsize);
class->methods = read_memory_unsigned_integer (addr + addrsize * 7, addrsize);
class->cache = read_memory_unsigned_integer (addr + addrsize * 8, addrsize);
class->protocols = read_memory_unsigned_integer
(addr + addrsize * 9, addrsize);
}
static CORE_ADDR
find_implementation_from_class (CORE_ADDR class, CORE_ADDR sel)
{
CORE_ADDR subclass = class;
char sel_str[2048];
int npasses;
int addrsize = get_addrsize ();
sel_str[0] = '\0';
while (subclass != 0)
{
struct objc_class class_str;
unsigned mlistnum = 0;
int class_initialized;
read_objc_class (subclass, &class_str);
class_initialized = ((class_str.info & 0x4L) == 0x4L);
if (!class_initialized)
{
if (sel_str[0] == '\0')
{
read_memory_string (sel, sel_str, 2047);
}
}
#if 0
{
char buffer[2048];
read_memory_string (class_str.name, buffer, 2047);
fprintf (stderr, "Reading methods for %s, info is 0x%lx\n", buffer, class_str.info);
}
#endif
#define CLS_NO_METHOD_ARRAY 0x4000
npasses = 0;
for (;;)
{
CORE_ADDR mlist;
unsigned long nmethods;
unsigned long i;
npasses++;
if (class_str.methods == 0x0)
break;
else if (class_str.info & CLS_NO_METHOD_ARRAY)
{
if (npasses == 1)
mlist = class_str.methods;
else
break;
}
else
{
mlist = read_memory_unsigned_integer
(class_str.methods + (addrsize * mlistnum), addrsize);
if (mlist == 0 || mlist == 0xffffffff
|| mlist == 0xffffffffffffffffULL)
break;
}
nmethods = read_objc_method_list_nmethods (mlist);
for (i = 0; i < nmethods; i++)
{
struct objc_method meth_str;
char name_str[2048];
read_objc_method_list_method (mlist, i, &meth_str);
if (!class_initialized)
read_memory_string (meth_str.name, name_str, 2047);
#if 0
if (class_initialized)
read_memory_string (meth_str.name, name_str, 2047);
fprintf (stderr,
"checking method 0x%lx (%s) against selector 0x%lx\n",
(long unsigned int) meth_str.name, name_str, (long unsigned int) sel);
#endif
if (meth_str.name == sel || (!class_initialized
&& (name_str[0] == sel_str[0])
&& (strcmp (name_str, sel_str) == 0)))
return 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);
}
#define OBJC_FETCH_POINTER_ARGUMENT(argi) \
FETCH_POINTER_ARGUMENT (get_current_frame (), argi, builtin_type_void_func_ptr)
static int
resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc)
{
CORE_ADDR object;
CORE_ADDR sel;
CORE_ADDR res;
object = OBJC_FETCH_POINTER_ARGUMENT (0);
sel = OBJC_FETCH_POINTER_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 = OBJC_FETCH_POINTER_ARGUMENT (1);
sel = OBJC_FETCH_POINTER_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 = OBJC_FETCH_POINTER_ARGUMENT (0);
sel = OBJC_FETCH_POINTER_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 = OBJC_FETCH_POINTER_ARGUMENT (1);
sel = OBJC_FETCH_POINTER_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;
}
int
should_lookup_objc_class ()
{
return lookup_objc_class_p;
}
#define CLS_META 0x2L
struct type *
value_objc_target_type (struct value *val, struct block *block)
{
struct type *base_type, *dynamic_type = NULL;
int addrsize = get_addrsize ();
base_type = check_typedef (value_type (val));
for (;;)
{
CHECK_TYPEDEF (base_type);
if (TYPE_CODE (base_type) != TYPE_CODE_PTR
&& TYPE_CODE (base_type) != TYPE_CODE_REF)
break;
base_type = TYPE_TARGET_TYPE (base_type);
}
if ((base_type == NULL) || (TYPE_TAG_NAME (base_type) != NULL
&& (strcmp (TYPE_TAG_NAME (base_type), "objc_class") == 0)))
return NULL;
if (TYPE_CODE (base_type) == TYPE_CODE_CLASS)
{
int i;
char *t_field_name;
short nfields;
t_field_name = NULL;
nfields = TYPE_NFIELDS (base_type);
while (base_type && nfields != 0)
{
i = TYPE_N_BASECLASSES (base_type);
if (i >= nfields)
return NULL;
t_field_name = TYPE_FIELD_NAME (base_type, i);
if (t_field_name && t_field_name[0] == '\0')
{
base_type = TYPE_FIELD_TYPE (base_type, i);
if (base_type)
nfields = TYPE_NFIELDS (base_type);
else
nfields = 0;
}
else
break;
}
if (t_field_name && (strcmp_iw (t_field_name, "isa") == 0))
{
struct symbol *class_symbol;
char class_name[256];
CORE_ADDR isa_addr;
CORE_ADDR name_addr;
long info_field;
isa_addr =
read_memory_unsigned_integer (value_as_address (val), addrsize);
info_field = read_memory_unsigned_integer
(isa_addr + addrsize * 4, addrsize);
if (info_field & CLS_META)
return NULL;
name_addr = read_memory_unsigned_integer
(isa_addr + addrsize * 2, addrsize);
read_memory_string (name_addr, class_name, 255);
class_symbol = lookup_symbol (class_name, block, STRUCT_DOMAIN, 0, 0);
if (! class_symbol)
{
warning ("can't find class named `%s' given by ObjC class object", class_name);
return NULL;
}
if (SYMBOL_CLASS (class_symbol) != LOC_TYPEDEF
|| TYPE_CODE (SYMBOL_TYPE (class_symbol)) != TYPE_CODE_CLASS)
{
warning ("The \"isa\" pointer gives a class name of `%s', but that isn't a type name",
class_name);
return NULL;
}
dynamic_type = SYMBOL_TYPE (class_symbol);
}
}
return dynamic_type;
}
void
_initialize_objc_lang ()
{
add_setshow_boolean_cmd ("call-po-at-unsafe-times", no_class, &call_po_at_unsafe_times,
"Set whether to override the check for potentially unsafe"
" situations before calling print-object.",
"Show whether to override the check for potentially unsafe"
" situations before calling print-object.",
"??",
NULL, NULL,
&setlist, &showlist);
add_setshow_boolean_cmd ("lookup-objc-class", no_class, &lookup_objc_class_p,
"Set whether we should attempt to lookup Obj-C classes when we resolve symbols.",
"Show whether we should attempt to lookup Obj-C classes when we resolve symbols.",
"??",
NULL, NULL,
&setlist, &showlist);
}