/* Helper routines for C++ support in GDB.
- Copyright (C) 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009
+ Free Software Foundation, Inc.
Contributed by MontaVista Software.
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include <ctype.h>
#include "cp-support.h"
#include "gdb_string.h"
#include "demangle.h"
#include "block.h"
#include "complaints.h"
#include "gdbtypes.h"
+#include "exceptions.h"
+#include "expression.h"
+#include "value.h"
+
+#include "safe-ctype.h"
#define d_left(dc) (dc)->u.s_binary.left
#define d_right(dc) (dc)->u.s_binary.right
static void maint_cplus_command (char *arg, int from_tty);
static void first_component_command (char *arg, int from_tty);
-/* Return the canonicalized form of STRING, or NULL if STRING can not be
- parsed. The return value is allocated via xmalloc.
+/* Operator validation.
+ NOTE: Multi-byte operators (usually the assignment variety operator)
+ must appear before the single byte version, i.e., "+=" before "+". */
+static const char *operator_tokens[] =
+ {
+ "++", "+=", "+", "->*", "->", "--", "-=", "-", "*=", "*", "/=", "/",
+ "%=", "%", "!=", "==", "!", "&&", "<<=", "<<", ">>=", ">>",
+ "<=", "<", ">=", ">", "~", "&=", "&", "|=", "||", "|", "^=", "^",
+ "=", "()", "[]", ",", "new", "delete"
+ /* new[] and delete[] require special whitespace handling */
+ };
+
+/* Return 1 if STRING is clearly already in canonical form. This
+ function is conservative; things which it does not recognize are
+ assumed to be non-canonical, and the parser will sort them out
+ afterwards. This speeds up the critical path for alphanumeric
+ identifiers. */
+
+static int
+cp_already_canonical (const char *string)
+{
+ /* Identifier start character [a-zA-Z_]. */
+ if (!ISIDST (string[0]))
+ return 0;
+
+ /* These are the only two identifiers which canonicalize to other
+ than themselves or an error: unsigned -> unsigned int and
+ signed -> int. */
+ if (string[0] == 'u' && strcmp (&string[1], "nsigned") == 0)
+ return 0;
+ else if (string[0] == 's' && strcmp (&string[1], "igned") == 0)
+ return 0;
+
+ /* Identifier character [a-zA-Z0-9_]. */
+ while (ISIDNUM (string[1]))
+ string++;
+
+ if (string[1] == '\0')
+ return 1;
+ else
+ return 0;
+}
- drow/2005-03-07: Should we also return NULL for things that trivially do
- not require any change? e.g. simple identifiers. This could be more
- efficient. */
+/* Parse STRING and convert it to canonical form. If parsing fails,
+ or if STRING is already canonical, return NULL. Otherwise return
+ the canonical form. The return value is allocated via xmalloc. */
char *
cp_canonicalize_string (const char *string)
{
- void *storage;
struct demangle_component *ret_comp;
+ unsigned int estimated_len;
char *ret;
- int len = strlen (string);
- len = len + len / 8;
+ if (cp_already_canonical (string))
+ return NULL;
- ret_comp = cp_demangled_name_to_comp (string, &storage, NULL);
+ ret_comp = cp_demangled_name_to_comp (string, NULL);
if (ret_comp == NULL)
return NULL;
- ret = cp_comp_to_string (ret_comp, len);
+ estimated_len = strlen (string) * 2;
+ ret = cp_comp_to_string (ret_comp, estimated_len);
- xfree (storage);
+ if (strcmp (string, ret) == 0)
+ {
+ xfree (ret);
+ return NULL;
+ }
return ret;
}
return NULL;
/* If we could demangle the name, parse it to build the component tree. */
- ret = cp_demangled_name_to_comp (demangled_name, memory, NULL);
+ ret = cp_demangled_name_to_comp (demangled_name, NULL);
if (ret == NULL)
{
- free (demangled_name);
+ xfree (demangled_name);
return NULL;
}
char *
cp_class_name_from_physname (const char *physname)
{
- void *storage;
+ void *storage = NULL;
char *demangled_name = NULL, *ret;
struct demangle_component *ret_comp, *prev_comp, *cur_comp;
int done;
char *
method_name_from_physname (const char *physname)
{
- void *storage;
+ void *storage = NULL;
char *demangled_name = NULL, *ret;
struct demangle_component *ret_comp;
int done;
char *
cp_func_name (const char *full_name)
{
- void *storage;
char *ret;
struct demangle_component *ret_comp;
int done;
- ret_comp = cp_demangled_name_to_comp (full_name, &storage, NULL);
+ ret_comp = cp_demangled_name_to_comp (full_name, NULL);
if (!ret_comp)
return NULL;
if (ret_comp != NULL)
ret = cp_comp_to_string (ret_comp, 10);
- xfree (storage);
return ret;
}
(optionally) a return type. Return the name of the function without
parameters or return type, or NULL if we can not parse the name. */
-static char *
-remove_params (const char *demangled_name)
+char *
+cp_remove_params (const char *demangled_name)
{
int done = 0;
struct demangle_component *ret_comp;
- void *storage;
char *ret = NULL;
if (demangled_name == NULL)
return NULL;
- ret_comp = cp_demangled_name_to_comp (demangled_name, &storage, NULL);
+ ret_comp = cp_demangled_name_to_comp (demangled_name, NULL);
if (ret_comp == NULL)
return NULL;
if (ret_comp->type == DEMANGLE_COMPONENT_TYPED_NAME)
ret = cp_comp_to_string (d_left (ret_comp), 10);
- xfree (storage);
return ret;
}
&& strncmp (name + index, "operator", LENGTH_OF_OPERATOR) == 0)
{
index += LENGTH_OF_OPERATOR;
- while (isspace(name[index]))
+ while (ISSPACE(name[index]))
++index;
switch (name[index])
{
return;
/* Get the demangled name without parameters */
- sym_name = remove_params (SYMBOL_NATURAL_NAME (sym));
+ sym_name = cp_remove_params (SYMBOL_NATURAL_NAME (sym));
if (!sym_name)
return;
current != NULL;
current = current->next)
{
- if (strcmp (namespace, current->outer) == 0)
+ if (strcmp (namespace, current->import_dest) == 0)
{
make_symbol_overload_list_using (func_name,
- current->inner);
+ current->import_src);
}
}
struct symbol * rtti_sym;
struct type * rtti_type;
- rtti_sym = lookup_symbol (name, block, STRUCT_DOMAIN, NULL, NULL);
+ rtti_sym = lookup_symbol (name, block, STRUCT_DOMAIN, NULL);
if (rtti_sym == NULL)
{
static void
first_component_command (char *arg, int from_tty)
{
- int len = cp_find_first_component (arg);
- char *prefix = alloca (len + 1);
+ int len;
+ char *prefix;
+
+ if (!arg)
+ return;
+
+ len = cp_find_first_component (arg);
+ prefix = alloca (len + 1);
memcpy (prefix, arg, len);
prefix[len] = '\0';
extern initialize_file_ftype _initialize_cp_support; /* -Wmissing-prototypes */
+#define SKIP_SPACE(P) \
+ do \
+ { \
+ while (*(P) == ' ' || *(P) == '\t') \
+ ++(P); \
+ } \
+ while (0)
+
+/* Returns the length of the operator name or 0 if INPUT does not
+ point to a valid C++ operator. INPUT should start with "operator". */
+int
+cp_validate_operator (const char *input)
+{
+ int i;
+ char *copy;
+ const char *p;
+ struct expression *expr;
+ struct value *val;
+ struct gdb_exception except;
+ struct cleanup *old_chain;
+
+ p = input;
+
+ if (strncmp (p, "operator", 8) == 0)
+ {
+ int valid = 0;
+ p += 8;
+
+ SKIP_SPACE (p);
+ for (i = 0; i < sizeof (operator_tokens) / sizeof (operator_tokens[0]);
+ ++i)
+ {
+ int length = strlen (operator_tokens[i]);
+ /* By using strncmp here, we MUST have operator_tokens ordered!
+ See additional notes where operator_tokens is defined above. */
+ if (strncmp (p, operator_tokens[i], length) == 0)
+ {
+ const char *op = p;
+ valid = 1;
+ p += length;
+
+ if (strncmp (op, "new", 3) == 0
+ || strncmp (op, "delete", 6) == 0)
+ {
+
+ /* Special case: new[] and delete[]. We must be careful
+ to swallow whitespace before/in "[]". */
+ SKIP_SPACE (p);
+
+ if (*p == '[')
+ {
+ ++p;
+ SKIP_SPACE (p);
+ if (*p == ']')
+ ++p;
+ else
+ valid = 0;
+ }
+ }
+
+ if (valid)
+ return (p - input);
+ }
+ }
+
+ /* Check input for a conversion operator. */
+
+ /* Skip past base typename */
+ while (*p != '*' && *p != '&' && *p != 0 && *p != ' ')
+ ++p;
+ SKIP_SPACE (p);
+
+ /* Add modifiers '*'/'&' */
+ while (*p == '*' || *p == '&')
+ {
+ ++p;
+ SKIP_SPACE (p);
+ }
+
+ /* Check for valid type. [Remember: input starts with
+ "operator".] */
+ copy = savestring (input + 8, p - input - 8);
+ expr = NULL;
+ val = NULL;
+ TRY_CATCH (except, RETURN_MASK_ALL)
+ {
+ expr = parse_expression (copy);
+ val = evaluate_type (expr);
+ }
+
+ xfree (copy);
+ if (expr)
+ xfree (expr);
+
+ if (val != NULL && value_type (val) != NULL)
+ return (p - input);
+ }
+
+ return 0;
+}
+
void
_initialize_cp_support (void)
{
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