/* Helper routines for C++ support in GDB.
- Copyright 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2002-2015 Free Software Foundation, Inc.
Contributed by MontaVista Software.
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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. */
+ 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 "gdb_assert.h"
#include "gdbcmd.h"
#include "dictionary.h"
#include "objfiles.h"
#include "symtab.h"
#include "block.h"
#include "complaints.h"
+#include "gdbtypes.h"
+#include "expression.h"
+#include "value.h"
+#include "cp-abi.h"
+#include "namespace.h"
+#include <signal.h>
-/* Functions related to demangled name parsing. */
+#include "safe-ctype.h"
+
+#define d_left(dc) (dc)->u.s_binary.left
+#define d_right(dc) (dc)->u.s_binary.right
-static const char *find_last_component (const char *name);
+/* Functions related to demangled name parsing. */
static unsigned int cp_find_first_component_aux (const char *name,
int permissive);
/* Functions/variables related to overload resolution. */
-static int sym_return_val_size;
+static int sym_return_val_size = -1;
static int sym_return_val_index;
static struct symbol **sym_return_val;
-static char *remove_params (const char *demangled_name);
+static void overload_list_add_symbol (struct symbol *sym,
+ const char *oload_name);
+
+static void make_symbol_overload_list_using (const char *func_name,
+ const char *the_namespace);
-static void overload_list_add_symbol (struct symbol *sym, char *oload_name);
+static void make_symbol_overload_list_qualified (const char *func_name);
/* The list of "maint cplus" commands. */
static void maint_cplus_command (char *arg, int from_tty);
static void first_component_command (char *arg, int from_tty);
-/* Here are some random pieces of trivia to keep in mind while trying
- to take apart demangled names:
+/* A list of typedefs which should not be substituted by replace_typedefs. */
+static const char * const ignore_typedefs[] =
+ {
+ "std::istream", "std::iostream", "std::ostream", "std::string"
+ };
- - Names can contain function arguments or templates, so the process
- has to be, to some extent recursive: maybe keep track of your
- depth based on encountering <> and ().
+static void
+ replace_typedefs (struct demangle_parse_info *info,
+ struct demangle_component *ret_comp,
+ canonicalization_ftype *finder,
+ void *data);
- - Parentheses don't just have to happen at the end of a name: they
- can occur even if the name in question isn't a function, because
- a template argument might be a type that's a function.
+/* A convenience function to copy STRING into OBSTACK, returning a pointer
+ to the newly allocated string and saving the number of bytes saved in LEN.
- - Conversely, even if you're trying to deal with a function, its
- demangled name might not end with ')': it could be a const or
- volatile class method, in which case it ends with "const" or
- "volatile".
+ It does not copy the terminating '\0' byte! */
- - Parentheses are also used in anonymous namespaces: a variable
- 'foo' in an anonymous namespace gets demangled as "(anonymous
- namespace)::foo".
+static char *
+copy_string_to_obstack (struct obstack *obstack, const char *string,
+ long *len)
+{
+ *len = strlen (string);
+ return (char *) obstack_copy (obstack, string, *len);
+}
- - And operator names can contain parentheses or angle brackets. */
+/* A cleanup wrapper for cp_demangled_name_parse_free. */
-/* FIXME: carlton/2003-03-13: We have several functions here with
- overlapping functionality; can we combine them? Also, do they
- handle all the above considerations correctly? */
+static void
+do_demangled_name_parse_free_cleanup (void *data)
+{
+ struct demangle_parse_info *info = (struct demangle_parse_info *) data;
-/* Find the last component of the demangled C++ name NAME. NAME
- must be a method name including arguments, in order to correctly
- locate the last component.
+ cp_demangled_name_parse_free (info);
+}
- This function return a pointer to the first colon before the
- last component, or NULL if the name had only one component. */
+/* Create a cleanup for C++ name parsing. */
-static const char *
-find_last_component (const char *name)
+struct cleanup *
+make_cleanup_cp_demangled_name_parse_free (struct demangle_parse_info *info)
{
- const char *p;
- int depth;
+ return make_cleanup (do_demangled_name_parse_free_cleanup, info);
+}
- /* Functions can have local classes, so we need to find the
- beginning of the last argument list, not the end of the first
- one. */
- p = name + strlen (name) - 1;
- while (p > name && *p != ')')
- p--;
+/* 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. */
- if (p == name)
- return NULL;
+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;
+}
+
+/* Inspect the given RET_COMP for its type. If it is a typedef,
+ replace the node with the typedef's tree.
+
+ Returns 1 if any typedef substitutions were made, 0 otherwise. */
- /* P now points at the `)' at the end of the argument list. Walk
- back to the beginning. */
- p--;
- depth = 1;
- while (p > name && depth > 0)
+static int
+inspect_type (struct demangle_parse_info *info,
+ struct demangle_component *ret_comp,
+ canonicalization_ftype *finder,
+ void *data)
+{
+ int i;
+ char *name;
+ struct symbol *sym;
+
+ /* Copy the symbol's name from RET_COMP and look it up
+ in the symbol table. */
+ name = (char *) alloca (ret_comp->u.s_name.len + 1);
+ memcpy (name, ret_comp->u.s_name.s, ret_comp->u.s_name.len);
+ name[ret_comp->u.s_name.len] = '\0';
+
+ /* Ignore any typedefs that should not be substituted. */
+ for (i = 0; i < ARRAY_SIZE (ignore_typedefs); ++i)
{
- if (*p == '<' || *p == '(')
- depth--;
- else if (*p == '>' || *p == ')')
- depth++;
- p--;
+ if (strcmp (name, ignore_typedefs[i]) == 0)
+ return 0;
}
- if (p == name)
- return NULL;
+ sym = NULL;
- while (p > name && *p != ':')
- p--;
+ TRY
+ {
+ sym = lookup_symbol (name, 0, VAR_DOMAIN, 0).symbol;
+ }
+ CATCH (except, RETURN_MASK_ALL)
+ {
+ return 0;
+ }
+ END_CATCH
- if (p == name || p == name + 1 || p[-1] != ':')
- return NULL;
+ if (sym != NULL)
+ {
+ struct type *otype = SYMBOL_TYPE (sym);
+
+ if (finder != NULL)
+ {
+ const char *new_name = (*finder) (otype, data);
+
+ if (new_name != NULL)
+ {
+ ret_comp->u.s_name.s = new_name;
+ ret_comp->u.s_name.len = strlen (new_name);
+ return 1;
+ }
+
+ return 0;
+ }
- return p - 1;
+ /* If the type is a typedef or namespace alias, replace it. */
+ if (TYPE_CODE (otype) == TYPE_CODE_TYPEDEF
+ || TYPE_CODE (otype) == TYPE_CODE_NAMESPACE)
+ {
+ long len;
+ int is_anon;
+ struct type *type;
+ struct demangle_parse_info *i;
+ struct ui_file *buf;
+
+ /* Get the real type of the typedef. */
+ type = check_typedef (otype);
+
+ /* If the symbol is a namespace and its type name is no different
+ than the name we looked up, this symbol is not a namespace
+ alias and does not need to be substituted. */
+ if (TYPE_CODE (otype) == TYPE_CODE_NAMESPACE
+ && strcmp (TYPE_NAME (type), name) == 0)
+ return 0;
+
+ is_anon = (TYPE_TAG_NAME (type) == NULL
+ && (TYPE_CODE (type) == TYPE_CODE_ENUM
+ || TYPE_CODE (type) == TYPE_CODE_STRUCT
+ || TYPE_CODE (type) == TYPE_CODE_UNION));
+ if (is_anon)
+ {
+ struct type *last = otype;
+
+ /* Find the last typedef for the type. */
+ while (TYPE_TARGET_TYPE (last) != NULL
+ && (TYPE_CODE (TYPE_TARGET_TYPE (last))
+ == TYPE_CODE_TYPEDEF))
+ last = TYPE_TARGET_TYPE (last);
+
+ /* If there is only one typedef for this anonymous type,
+ do not substitute it. */
+ if (type == otype)
+ return 0;
+ else
+ /* Use the last typedef seen as the type for this
+ anonymous type. */
+ type = last;
+ }
+
+ buf = mem_fileopen ();
+ TRY
+ {
+ type_print (type, "", buf, -1);
+ }
+
+ /* If type_print threw an exception, there is little point
+ in continuing, so just bow out gracefully. */
+ CATCH (except, RETURN_MASK_ERROR)
+ {
+ ui_file_delete (buf);
+ return 0;
+ }
+ END_CATCH
+
+ name = ui_file_obsavestring (buf, &info->obstack, &len);
+ ui_file_delete (buf);
+
+ /* Turn the result into a new tree. Note that this
+ tree will contain pointers into NAME, so NAME cannot
+ be free'd until all typedef conversion is done and
+ the final result is converted into a string. */
+ i = cp_demangled_name_to_comp (name, NULL);
+ if (i != NULL)
+ {
+ /* Merge the two trees. */
+ cp_merge_demangle_parse_infos (info, ret_comp, i);
+
+ /* Replace any newly introduced typedefs -- but not
+ if the type is anonymous (that would lead to infinite
+ looping). */
+ if (!is_anon)
+ replace_typedefs (info, ret_comp, finder, data);
+ }
+ else
+ {
+ /* This shouldn't happen unless the type printer has
+ output something that the name parser cannot grok.
+ Nonetheless, an ounce of prevention...
+
+ Canonicalize the name again, and store it in the
+ current node (RET_COMP). */
+ char *canon = cp_canonicalize_string_no_typedefs (name);
+
+ if (canon != NULL)
+ {
+ /* Copy the canonicalization into the obstack and
+ free CANON. */
+ name = copy_string_to_obstack (&info->obstack, canon, &len);
+ xfree (canon);
+ }
+
+ ret_comp->u.s_name.s = name;
+ ret_comp->u.s_name.len = len;
+ }
+
+ return 1;
+ }
+ }
+
+ return 0;
}
-/* Return the name of the class containing method PHYSNAME. */
+/* Replace any typedefs appearing in the qualified name
+ (DEMANGLE_COMPONENT_QUAL_NAME) represented in RET_COMP for the name parse
+ given in INFO. */
+
+static void
+replace_typedefs_qualified_name (struct demangle_parse_info *info,
+ struct demangle_component *ret_comp,
+ canonicalization_ftype *finder,
+ void *data)
+{
+ long len;
+ char *name;
+ struct ui_file *buf = mem_fileopen ();
+ struct demangle_component *comp = ret_comp;
+
+ /* Walk each node of the qualified name, reconstructing the name of
+ this element. With every node, check for any typedef substitutions.
+ If a substitution has occurred, replace the qualified name node
+ with a DEMANGLE_COMPONENT_NAME node representing the new, typedef-
+ substituted name. */
+ while (comp->type == DEMANGLE_COMPONENT_QUAL_NAME)
+ {
+ if (d_left (comp)->type == DEMANGLE_COMPONENT_NAME)
+ {
+ struct demangle_component newobj;
+
+ ui_file_write (buf, d_left (comp)->u.s_name.s,
+ d_left (comp)->u.s_name.len);
+ name = ui_file_obsavestring (buf, &info->obstack, &len);
+ newobj.type = DEMANGLE_COMPONENT_NAME;
+ newobj.u.s_name.s = name;
+ newobj.u.s_name.len = len;
+ if (inspect_type (info, &newobj, finder, data))
+ {
+ char *n, *s;
+ long slen;
+
+ /* A typedef was substituted in NEW. Convert it to a
+ string and replace the top DEMANGLE_COMPONENT_QUAL_NAME
+ node. */
+
+ ui_file_rewind (buf);
+ n = cp_comp_to_string (&newobj, 100);
+ if (n == NULL)
+ {
+ /* If something went astray, abort typedef substitutions. */
+ ui_file_delete (buf);
+ return;
+ }
+
+ s = copy_string_to_obstack (&info->obstack, n, &slen);
+ xfree (n);
+
+ d_left (ret_comp)->type = DEMANGLE_COMPONENT_NAME;
+ d_left (ret_comp)->u.s_name.s = s;
+ d_left (ret_comp)->u.s_name.len = slen;
+ d_right (ret_comp) = d_right (comp);
+ comp = ret_comp;
+ continue;
+ }
+ }
+ else
+ {
+ /* The current node is not a name, so simply replace any
+ typedefs in it. Then print it to the stream to continue
+ checking for more typedefs in the tree. */
+ replace_typedefs (info, d_left (comp), finder, data);
+ name = cp_comp_to_string (d_left (comp), 100);
+ if (name == NULL)
+ {
+ /* If something went astray, abort typedef substitutions. */
+ ui_file_delete (buf);
+ return;
+ }
+ fputs_unfiltered (name, buf);
+ xfree (name);
+ }
+
+ ui_file_write (buf, "::", 2);
+ comp = d_right (comp);
+ }
+
+ /* If the next component is DEMANGLE_COMPONENT_NAME, save the qualified
+ name assembled above and append the name given by COMP. Then use this
+ reassembled name to check for a typedef. */
+
+ if (comp->type == DEMANGLE_COMPONENT_NAME)
+ {
+ ui_file_write (buf, comp->u.s_name.s, comp->u.s_name.len);
+ name = ui_file_obsavestring (buf, &info->obstack, &len);
+
+ /* Replace the top (DEMANGLE_COMPONENT_QUAL_NAME) node
+ with a DEMANGLE_COMPONENT_NAME node containing the whole
+ name. */
+ ret_comp->type = DEMANGLE_COMPONENT_NAME;
+ ret_comp->u.s_name.s = name;
+ ret_comp->u.s_name.len = len;
+ inspect_type (info, ret_comp, finder, data);
+ }
+ else
+ replace_typedefs (info, comp, finder, data);
+
+ ui_file_delete (buf);
+}
+
+
+/* A function to check const and volatile qualifiers for argument types.
+
+ "Parameter declarations that differ only in the presence
+ or absence of `const' and/or `volatile' are equivalent."
+ C++ Standard N3290, clause 13.1.3 #4. */
+
+static void
+check_cv_qualifiers (struct demangle_component *ret_comp)
+{
+ while (d_left (ret_comp) != NULL
+ && (d_left (ret_comp)->type == DEMANGLE_COMPONENT_CONST
+ || d_left (ret_comp)->type == DEMANGLE_COMPONENT_VOLATILE))
+ {
+ d_left (ret_comp) = d_left (d_left (ret_comp));
+ }
+}
+
+/* Walk the parse tree given by RET_COMP, replacing any typedefs with
+ their basic types. */
+
+static void
+replace_typedefs (struct demangle_parse_info *info,
+ struct demangle_component *ret_comp,
+ canonicalization_ftype *finder,
+ void *data)
+{
+ if (ret_comp)
+ {
+ if (finder != NULL
+ && (ret_comp->type == DEMANGLE_COMPONENT_NAME
+ || ret_comp->type == DEMANGLE_COMPONENT_QUAL_NAME
+ || ret_comp->type == DEMANGLE_COMPONENT_TEMPLATE
+ || ret_comp->type == DEMANGLE_COMPONENT_BUILTIN_TYPE))
+ {
+ char *local_name = cp_comp_to_string (ret_comp, 10);
+
+ if (local_name != NULL)
+ {
+ struct symbol *sym = NULL;
+
+ sym = NULL;
+ TRY
+ {
+ sym = lookup_symbol (local_name, 0, VAR_DOMAIN, 0).symbol;
+ }
+ CATCH (except, RETURN_MASK_ALL)
+ {
+ }
+ END_CATCH
+
+ xfree (local_name);
+
+ if (sym != NULL)
+ {
+ struct type *otype = SYMBOL_TYPE (sym);
+ const char *new_name = (*finder) (otype, data);
+
+ if (new_name != NULL)
+ {
+ ret_comp->type = DEMANGLE_COMPONENT_NAME;
+ ret_comp->u.s_name.s = new_name;
+ ret_comp->u.s_name.len = strlen (new_name);
+ return;
+ }
+ }
+ }
+ }
+
+ switch (ret_comp->type)
+ {
+ case DEMANGLE_COMPONENT_ARGLIST:
+ check_cv_qualifiers (ret_comp);
+ /* Fall through */
+
+ case DEMANGLE_COMPONENT_FUNCTION_TYPE:
+ case DEMANGLE_COMPONENT_TEMPLATE:
+ case DEMANGLE_COMPONENT_TEMPLATE_ARGLIST:
+ case DEMANGLE_COMPONENT_TYPED_NAME:
+ replace_typedefs (info, d_left (ret_comp), finder, data);
+ replace_typedefs (info, d_right (ret_comp), finder, data);
+ break;
+
+ case DEMANGLE_COMPONENT_NAME:
+ inspect_type (info, ret_comp, finder, data);
+ break;
+
+ case DEMANGLE_COMPONENT_QUAL_NAME:
+ replace_typedefs_qualified_name (info, ret_comp, finder, data);
+ break;
+
+ case DEMANGLE_COMPONENT_LOCAL_NAME:
+ case DEMANGLE_COMPONENT_CTOR:
+ case DEMANGLE_COMPONENT_ARRAY_TYPE:
+ case DEMANGLE_COMPONENT_PTRMEM_TYPE:
+ replace_typedefs (info, d_right (ret_comp), finder, data);
+ break;
+
+ case DEMANGLE_COMPONENT_CONST:
+ case DEMANGLE_COMPONENT_RESTRICT:
+ case DEMANGLE_COMPONENT_VOLATILE:
+ case DEMANGLE_COMPONENT_VOLATILE_THIS:
+ case DEMANGLE_COMPONENT_CONST_THIS:
+ case DEMANGLE_COMPONENT_RESTRICT_THIS:
+ case DEMANGLE_COMPONENT_POINTER:
+ case DEMANGLE_COMPONENT_REFERENCE:
+ replace_typedefs (info, d_left (ret_comp), finder, data);
+ break;
+
+ default:
+ break;
+ }
+ }
+}
+
+/* Parse STRING and convert it to canonical form, resolving any typedefs.
+ If parsing fails, or if STRING is already canonical, return NULL.
+ Otherwise return the canonical form. The return value is allocated via
+ xmalloc. If FINDER is not NULL, then type components are passed to
+ FINDER to be looked up. DATA is passed verbatim to FINDER. */
char *
-class_name_from_physname (const char *physname)
+cp_canonicalize_string_full (const char *string,
+ canonicalization_ftype *finder,
+ void *data)
{
- char *ret = NULL;
- const char *end;
- int depth = 0;
- char *demangled_name = cplus_demangle (physname, DMGL_ANSI);
+ char *ret;
+ unsigned int estimated_len;
+ struct demangle_parse_info *info;
+
+ ret = NULL;
+ estimated_len = strlen (string) * 2;
+ info = cp_demangled_name_to_comp (string, NULL);
+ if (info != NULL)
+ {
+ /* Replace all the typedefs in the tree. */
+ replace_typedefs (info, info->tree, finder, data);
+
+ /* Convert the tree back into a string. */
+ ret = cp_comp_to_string (info->tree, estimated_len);
+ gdb_assert (ret != NULL);
+
+ /* Free the parse information. */
+ cp_demangled_name_parse_free (info);
+
+ /* Finally, compare the original string with the computed
+ name, returning NULL if they are the same. */
+ if (strcmp (string, ret) == 0)
+ {
+ xfree (ret);
+ return NULL;
+ }
+ }
+
+ return ret;
+}
+
+/* Like cp_canonicalize_string_full, but always passes NULL for
+ FINDER. */
+
+char *
+cp_canonicalize_string_no_typedefs (const char *string)
+{
+ return cp_canonicalize_string_full (string, NULL, NULL);
+}
+
+/* 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)
+{
+ struct demangle_parse_info *info;
+ unsigned int estimated_len;
+ char *ret;
+ if (cp_already_canonical (string))
+ return NULL;
+
+ info = cp_demangled_name_to_comp (string, NULL);
+ if (info == NULL)
+ return NULL;
+
+ estimated_len = strlen (string) * 2;
+ ret = cp_comp_to_string (info->tree, estimated_len);
+ cp_demangled_name_parse_free (info);
+
+ if (ret == NULL)
+ {
+ warning (_("internal error: string \"%s\" failed to be canonicalized"),
+ string);
+ return NULL;
+ }
+
+ if (strcmp (string, ret) == 0)
+ {
+ xfree (ret);
+ return NULL;
+ }
+
+ return ret;
+}
+
+/* Convert a mangled name to a demangle_component tree. *MEMORY is
+ set to the block of used memory that should be freed when finished
+ with the tree. DEMANGLED_P is set to the char * that should be
+ freed when finished with the tree, or NULL if none was needed.
+ OPTIONS will be passed to the demangler. */
+
+static struct demangle_parse_info *
+mangled_name_to_comp (const char *mangled_name, int options,
+ void **memory, char **demangled_p)
+{
+ char *demangled_name;
+ struct demangle_parse_info *info;
+
+ /* If it looks like a v3 mangled name, then try to go directly
+ to trees. */
+ if (mangled_name[0] == '_' && mangled_name[1] == 'Z')
+ {
+ struct demangle_component *ret;
+
+ ret = cplus_demangle_v3_components (mangled_name,
+ options, memory);
+ if (ret)
+ {
+ info = cp_new_demangle_parse_info ();
+ info->tree = ret;
+ *demangled_p = NULL;
+ return info;
+ }
+ }
+
+ /* If it doesn't, or if that failed, then try to demangle the
+ name. */
+ demangled_name = gdb_demangle (mangled_name, options);
if (demangled_name == NULL)
+ return NULL;
+
+ /* If we could demangle the name, parse it to build the component
+ tree. */
+ info = cp_demangled_name_to_comp (demangled_name, NULL);
+
+ if (info == NULL)
+ {
+ xfree (demangled_name);
+ return NULL;
+ }
+
+ *demangled_p = demangled_name;
+ return info;
+}
+
+/* Return the name of the class containing method PHYSNAME. */
+
+char *
+cp_class_name_from_physname (const char *physname)
+{
+ void *storage = NULL;
+ char *demangled_name = NULL, *ret;
+ struct demangle_component *ret_comp, *prev_comp, *cur_comp;
+ struct demangle_parse_info *info;
+ int done;
+
+ info = mangled_name_to_comp (physname, DMGL_ANSI,
+ &storage, &demangled_name);
+ if (info == NULL)
return NULL;
- end = find_last_component (demangled_name);
- if (end != NULL)
+ done = 0;
+ ret_comp = info->tree;
+
+ /* First strip off any qualifiers, if we have a function or
+ method. */
+ while (!done)
+ switch (ret_comp->type)
+ {
+ case DEMANGLE_COMPONENT_CONST:
+ case DEMANGLE_COMPONENT_RESTRICT:
+ case DEMANGLE_COMPONENT_VOLATILE:
+ case DEMANGLE_COMPONENT_CONST_THIS:
+ case DEMANGLE_COMPONENT_RESTRICT_THIS:
+ case DEMANGLE_COMPONENT_VOLATILE_THIS:
+ case DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL:
+ ret_comp = d_left (ret_comp);
+ break;
+ default:
+ done = 1;
+ break;
+ }
+
+ /* If what we have now is a function, discard the argument list. */
+ if (ret_comp->type == DEMANGLE_COMPONENT_TYPED_NAME)
+ ret_comp = d_left (ret_comp);
+
+ /* If what we have now is a template, strip off the template
+ arguments. The left subtree may be a qualified name. */
+ if (ret_comp->type == DEMANGLE_COMPONENT_TEMPLATE)
+ ret_comp = d_left (ret_comp);
+
+ /* What we have now should be a name, possibly qualified.
+ Additional qualifiers could live in the left subtree or the right
+ subtree. Find the last piece. */
+ done = 0;
+ prev_comp = NULL;
+ cur_comp = ret_comp;
+ while (!done)
+ switch (cur_comp->type)
+ {
+ case DEMANGLE_COMPONENT_QUAL_NAME:
+ case DEMANGLE_COMPONENT_LOCAL_NAME:
+ prev_comp = cur_comp;
+ cur_comp = d_right (cur_comp);
+ break;
+ case DEMANGLE_COMPONENT_TEMPLATE:
+ case DEMANGLE_COMPONENT_NAME:
+ case DEMANGLE_COMPONENT_CTOR:
+ case DEMANGLE_COMPONENT_DTOR:
+ case DEMANGLE_COMPONENT_OPERATOR:
+ case DEMANGLE_COMPONENT_EXTENDED_OPERATOR:
+ done = 1;
+ break;
+ default:
+ done = 1;
+ cur_comp = NULL;
+ break;
+ }
+
+ ret = NULL;
+ if (cur_comp != NULL && prev_comp != NULL)
{
- ret = xmalloc (end - demangled_name + 1);
- memcpy (ret, demangled_name, end - demangled_name);
- ret[end - demangled_name] = '\0';
+ /* We want to discard the rightmost child of PREV_COMP. */
+ *prev_comp = *d_left (prev_comp);
+ /* The ten is completely arbitrary; we don't have a good
+ estimate. */
+ ret = cp_comp_to_string (ret_comp, 10);
}
+ xfree (storage);
xfree (demangled_name);
+ cp_demangled_name_parse_free (info);
return ret;
}
+/* Return the child of COMP which is the basename of a method,
+ variable, et cetera. All scope qualifiers are discarded, but
+ template arguments will be included. The component tree may be
+ modified. */
+
+static struct demangle_component *
+unqualified_name_from_comp (struct demangle_component *comp)
+{
+ struct demangle_component *ret_comp = comp, *last_template;
+ int done;
+
+ done = 0;
+ last_template = NULL;
+ while (!done)
+ switch (ret_comp->type)
+ {
+ case DEMANGLE_COMPONENT_QUAL_NAME:
+ case DEMANGLE_COMPONENT_LOCAL_NAME:
+ ret_comp = d_right (ret_comp);
+ break;
+ case DEMANGLE_COMPONENT_TYPED_NAME:
+ ret_comp = d_left (ret_comp);
+ break;
+ case DEMANGLE_COMPONENT_TEMPLATE:
+ gdb_assert (last_template == NULL);
+ last_template = ret_comp;
+ ret_comp = d_left (ret_comp);
+ break;
+ case DEMANGLE_COMPONENT_CONST:
+ case DEMANGLE_COMPONENT_RESTRICT:
+ case DEMANGLE_COMPONENT_VOLATILE:
+ case DEMANGLE_COMPONENT_CONST_THIS:
+ case DEMANGLE_COMPONENT_RESTRICT_THIS:
+ case DEMANGLE_COMPONENT_VOLATILE_THIS:
+ case DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL:
+ ret_comp = d_left (ret_comp);
+ break;
+ case DEMANGLE_COMPONENT_NAME:
+ case DEMANGLE_COMPONENT_CTOR:
+ case DEMANGLE_COMPONENT_DTOR:
+ case DEMANGLE_COMPONENT_OPERATOR:
+ case DEMANGLE_COMPONENT_EXTENDED_OPERATOR:
+ done = 1;
+ break;
+ default:
+ return NULL;
+ break;
+ }
+
+ if (last_template)
+ {
+ d_left (last_template) = ret_comp;
+ return last_template;
+ }
+
+ return ret_comp;
+}
+
/* Return the name of the method whose linkage name is PHYSNAME. */
char *
method_name_from_physname (const char *physname)
{
+ void *storage = NULL;
+ char *demangled_name = NULL, *ret;
+ struct demangle_component *ret_comp;
+ struct demangle_parse_info *info;
+
+ info = mangled_name_to_comp (physname, DMGL_ANSI,
+ &storage, &demangled_name);
+ if (info == NULL)
+ return NULL;
+
+ ret_comp = unqualified_name_from_comp (info->tree);
+
+ ret = NULL;
+ if (ret_comp != NULL)
+ /* The ten is completely arbitrary; we don't have a good
+ estimate. */
+ ret = cp_comp_to_string (ret_comp, 10);
+
+ xfree (storage);
+ xfree (demangled_name);
+ cp_demangled_name_parse_free (info);
+ return ret;
+}
+
+/* If FULL_NAME is the demangled name of a C++ function (including an
+ arg list, possibly including namespace/class qualifications),
+ return a new string containing only the function name (without the
+ arg list/class qualifications). Otherwise, return NULL. The
+ caller is responsible for freeing the memory in question. */
+
+char *
+cp_func_name (const char *full_name)
+{
+ char *ret;
+ struct demangle_component *ret_comp;
+ struct demangle_parse_info *info;
+
+ info = cp_demangled_name_to_comp (full_name, NULL);
+ if (!info)
+ return NULL;
+
+ ret_comp = unqualified_name_from_comp (info->tree);
+
+ ret = NULL;
+ if (ret_comp != NULL)
+ ret = cp_comp_to_string (ret_comp, 10);
+
+ cp_demangled_name_parse_free (info);
+ return ret;
+}
+
+/* DEMANGLED_NAME is the name of a function, including parameters and
+ (optionally) a return type. Return the name of the function without
+ parameters or return type, or NULL if we can not parse the name. */
+
+char *
+cp_remove_params (const char *demangled_name)
+{
+ int done = 0;
+ struct demangle_component *ret_comp;
+ struct demangle_parse_info *info;
char *ret = NULL;
- const char *end;
- int depth = 0;
- char *demangled_name = cplus_demangle (physname, DMGL_ANSI);
if (demangled_name == NULL)
return NULL;
- end = find_last_component (demangled_name);
- if (end != NULL)
- {
- char *args;
- int len;
+ info = cp_demangled_name_to_comp (demangled_name, NULL);
+ if (info == NULL)
+ return NULL;
- /* Skip "::". */
- end = end + 2;
+ /* First strip off any qualifiers, if we have a function or method. */
+ ret_comp = info->tree;
+ while (!done)
+ switch (ret_comp->type)
+ {
+ case DEMANGLE_COMPONENT_CONST:
+ case DEMANGLE_COMPONENT_RESTRICT:
+ case DEMANGLE_COMPONENT_VOLATILE:
+ case DEMANGLE_COMPONENT_CONST_THIS:
+ case DEMANGLE_COMPONENT_RESTRICT_THIS:
+ case DEMANGLE_COMPONENT_VOLATILE_THIS:
+ case DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL:
+ ret_comp = d_left (ret_comp);
+ break;
+ default:
+ done = 1;
+ break;
+ }
- /* Find the argument list, if any. */
- args = strchr (end, '(');
- if (args == NULL)
- len = strlen (end + 2);
- else
- {
- args --;
- while (*args == ' ')
- args --;
- len = args - end + 1;
- }
- ret = xmalloc (len + 1);
- memcpy (ret, end, len);
- ret[len] = 0;
- }
+ /* What we have now should be a function. Return its name. */
+ if (ret_comp->type == DEMANGLE_COMPONENT_TYPED_NAME)
+ ret = cp_comp_to_string (d_left (ret_comp), 10);
- xfree (demangled_name);
+ cp_demangled_name_parse_free (info);
return ret;
}
+/* Here are some random pieces of trivia to keep in mind while trying
+ to take apart demangled names:
+
+ - Names can contain function arguments or templates, so the process
+ has to be, to some extent recursive: maybe keep track of your
+ depth based on encountering <> and ().
+
+ - Parentheses don't just have to happen at the end of a name: they
+ can occur even if the name in question isn't a function, because
+ a template argument might be a type that's a function.
+
+ - Conversely, even if you're trying to deal with a function, its
+ demangled name might not end with ')': it could be a const or
+ volatile class method, in which case it ends with "const" or
+ "volatile".
+
+ - Parentheses are also used in anonymous namespaces: a variable
+ 'foo' in an anonymous namespace gets demangled as "(anonymous
+ namespace)::foo".
+
+ - And operator names can contain parentheses or angle brackets. */
+
+/* FIXME: carlton/2003-03-13: We have several functions here with
+ overlapping functionality; can we combine them? Also, do they
+ handle all the above considerations correctly? */
+
+
/* This returns the length of first component of NAME, which should be
the demangled name of a C++ variable/function/method/etc.
Specifically, it returns the index of the first colon forming the
case 'o':
/* Operator names can screw up the recursion. */
if (operator_possible
- && strncmp (name + index, "operator", LENGTH_OF_OPERATOR) == 0)
+ && strncmp (name + index, "operator",
+ LENGTH_OF_OPERATOR) == 0)
{
index += LENGTH_OF_OPERATOR;
- while (isspace(name[index]))
+ while (ISSPACE(name[index]))
++index;
switch (name[index])
{
/* Overload resolution functions. */
-static char *
-remove_params (const char *demangled_name)
-{
- const char *argp;
- char *new_name;
- int depth;
-
- if (demangled_name == NULL)
- return NULL;
-
- /* First find the end of the arg list. */
- argp = strrchr (demangled_name, ')');
- if (argp == NULL)
- return NULL;
-
- /* Back up to the beginning. */
- depth = 1;
-
- while (argp-- > demangled_name)
- {
- if (*argp == ')')
- depth ++;
- else if (*argp == '(')
- {
- depth --;
-
- if (depth == 0)
- break;
- }
- }
- if (depth != 0)
- internal_error (__FILE__, __LINE__,
- "bad demangled name %s\n", demangled_name);
- while (argp[-1] == ' ' && argp > demangled_name)
- argp --;
-
- new_name = xmalloc (argp - demangled_name + 1);
- memcpy (new_name, demangled_name, argp - demangled_name);
- new_name[argp - demangled_name] = '\0';
- return new_name;
-}
-
-/* Test to see if the symbol specified by SYMNAME (which is already
- demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
- characters. If so, add it to the current completion list. */
+/* Test to see if SYM is a symbol that we haven't seen corresponding
+ to a function named OLOAD_NAME. If so, add it to the current
+ completion list. */
static void
-overload_list_add_symbol (struct symbol *sym, char *oload_name)
+overload_list_add_symbol (struct symbol *sym,
+ const char *oload_name)
{
int newsize;
int i;
char *sym_name;
- /* If there is no type information, we can't do anything, so skip */
+ /* If there is no type information, we can't do anything, so
+ skip. */
if (SYMBOL_TYPE (sym) == NULL)
return;
- /* skip any symbols that we've already considered. */
+ /* skip any symbols that we've already considered. */
for (i = 0; i < sym_return_val_index; ++i)
- if (!strcmp (DEPRECATED_SYMBOL_NAME (sym), DEPRECATED_SYMBOL_NAME (sym_return_val[i])))
+ if (strcmp (SYMBOL_LINKAGE_NAME (sym),
+ SYMBOL_LINKAGE_NAME (sym_return_val[i])) == 0)
return;
/* Get the demangled name without parameters */
- sym_name = remove_params (SYMBOL_DEMANGLED_NAME (sym));
+ sym_name = cp_remove_params (SYMBOL_NATURAL_NAME (sym));
if (!sym_name)
return;
xfree (sym_name);
- /* We have a match for an overload instance, so add SYM to the current list
- * of overload instances */
+ /* We have a match for an overload instance, so add SYM to the
+ current list of overload instances */
if (sym_return_val_index + 3 > sym_return_val_size)
{
newsize = (sym_return_val_size *= 2) * sizeof (struct symbol *);
- sym_return_val = (struct symbol **) xrealloc ((char *) sym_return_val, newsize);
+ sym_return_val = (struct symbol **)
+ xrealloc ((char *) sym_return_val, newsize);
}
sym_return_val[sym_return_val_index++] = sym;
sym_return_val[sym_return_val_index] = NULL;
}
/* Return a null-terminated list of pointers to function symbols that
- * match name of the supplied symbol FSYM.
- * This is used in finding all overloaded instances of a function name.
- * This has been modified from make_symbol_completion_list. */
-
+ are named FUNC_NAME and are visible within NAMESPACE. */
struct symbol **
-make_symbol_overload_list (struct symbol *fsym)
-{
- register struct symbol *sym;
- register struct symtab *s;
- register struct partial_symtab *ps;
- register struct objfile *objfile;
- register struct block *b, *surrounding_static_block = 0;
- struct dict_iterator iter;
- /* The name we are completing on. */
- char *oload_name = NULL;
- /* Length of name. */
- int oload_name_len = 0;
-
- /* Look for the symbol we are supposed to complete on. */
-
- oload_name = remove_params (SYMBOL_DEMANGLED_NAME (fsym));
- if (!oload_name)
- {
- sym_return_val_size = 1;
- sym_return_val = (struct symbol **) xmalloc (2 * sizeof (struct symbol *));
- sym_return_val[0] = fsym;
- sym_return_val[1] = NULL;
-
- return sym_return_val;
- }
- oload_name_len = strlen (oload_name);
+make_symbol_overload_list (const char *func_name,
+ const char *the_namespace)
+{
+ struct cleanup *old_cleanups;
+ const char *name;
sym_return_val_size = 100;
sym_return_val_index = 0;
- sym_return_val = (struct symbol **) xmalloc ((sym_return_val_size + 1) * sizeof (struct symbol *));
+ sym_return_val = XNEWVEC (struct symbol *, sym_return_val_size + 1);
sym_return_val[0] = NULL;
- /* Read in all partial symtabs containing a partial symbol named
- OLOAD_NAME. */
+ old_cleanups = make_cleanup (xfree, sym_return_val);
- ALL_PSYMTABS (objfile, ps)
- {
- struct partial_symbol **psym;
+ make_symbol_overload_list_using (func_name, the_namespace);
- /* If the psymtab's been read in we'll get it when we search
- through the blockvector. */
- if (ps->readin)
- continue;
+ if (the_namespace[0] == '\0')
+ name = func_name;
+ else
+ {
+ char *concatenated_name
+ = (char *) alloca (strlen (the_namespace) + 2 + strlen (func_name) + 1);
+ strcpy (concatenated_name, the_namespace);
+ strcat (concatenated_name, "::");
+ strcat (concatenated_name, func_name);
+ name = concatenated_name;
+ }
+
+ make_symbol_overload_list_qualified (name);
+
+ discard_cleanups (old_cleanups);
+
+ return sym_return_val;
+}
+
+/* Add all symbols with a name matching NAME in BLOCK to the overload
+ list. */
+
+static void
+make_symbol_overload_list_block (const char *name,
+ const struct block *block)
+{
+ struct block_iterator iter;
+ struct symbol *sym;
+
+ ALL_BLOCK_SYMBOLS_WITH_NAME (block, name, iter, sym)
+ overload_list_add_symbol (sym, name);
+}
+
+/* Adds the function FUNC_NAME from NAMESPACE to the overload set. */
+
+static void
+make_symbol_overload_list_namespace (const char *func_name,
+ const char *the_namespace)
+{
+ const char *name;
+ const struct block *block = NULL;
+
+ if (the_namespace[0] == '\0')
+ name = func_name;
+ else
+ {
+ char *concatenated_name
+ = (char *) alloca (strlen (the_namespace) + 2 + strlen (func_name) + 1);
+
+ strcpy (concatenated_name, the_namespace);
+ strcat (concatenated_name, "::");
+ strcat (concatenated_name, func_name);
+ name = concatenated_name;
+ }
+
+ /* Look in the static block. */
+ block = block_static_block (get_selected_block (0));
+ if (block)
+ make_symbol_overload_list_block (name, block);
+
+ /* Look in the global block. */
+ block = block_global_block (block);
+ if (block)
+ make_symbol_overload_list_block (name, block);
+
+}
+
+/* Search the namespace of the given type and namespace of and public
+ base types. */
+
+static void
+make_symbol_overload_list_adl_namespace (struct type *type,
+ const char *func_name)
+{
+ char *the_namespace;
+ const char *type_name;
+ int i, prefix_len;
+
+ while (TYPE_CODE (type) == TYPE_CODE_PTR
+ || TYPE_CODE (type) == TYPE_CODE_REF
+ || TYPE_CODE (type) == TYPE_CODE_ARRAY
+ || TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
+ {
+ if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
+ type = check_typedef(type);
+ else
+ type = TYPE_TARGET_TYPE (type);
+ }
+
+ type_name = TYPE_NAME (type);
+
+ if (type_name == NULL)
+ return;
+
+ prefix_len = cp_entire_prefix_len (type_name);
+
+ if (prefix_len != 0)
+ {
+ the_namespace = (char *) alloca (prefix_len + 1);
+ strncpy (the_namespace, type_name, prefix_len);
+ the_namespace[prefix_len] = '\0';
+
+ make_symbol_overload_list_namespace (func_name, the_namespace);
+ }
- if ((lookup_partial_symbol (ps, oload_name, NULL, 1, VAR_DOMAIN)
- != NULL)
- || (lookup_partial_symbol (ps, oload_name, NULL, 0, VAR_DOMAIN)
- != NULL))
- PSYMTAB_TO_SYMTAB (ps);
+ /* Check public base type */
+ if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
+ for (i = 0; i < TYPE_N_BASECLASSES (type); i++)
+ {
+ if (BASETYPE_VIA_PUBLIC (type, i))
+ make_symbol_overload_list_adl_namespace (TYPE_BASECLASS (type,
+ i),
+ func_name);
+ }
+}
+
+/* Adds the overload list overload candidates for FUNC_NAME found
+ through argument dependent lookup. */
+
+struct symbol **
+make_symbol_overload_list_adl (struct type **arg_types, int nargs,
+ const char *func_name)
+{
+ int i;
+
+ gdb_assert (sym_return_val_size != -1);
+
+ for (i = 1; i <= nargs; i++)
+ make_symbol_overload_list_adl_namespace (arg_types[i - 1],
+ func_name);
+
+ return sym_return_val;
+}
+
+/* Used for cleanups to reset the "searched" flag in case of an
+ error. */
+
+static void
+reset_directive_searched (void *data)
+{
+ struct using_direct *direct = (struct using_direct *) data;
+ direct->searched = 0;
+}
+
+/* This applies the using directives to add namespaces to search in,
+ and then searches for overloads in all of those namespaces. It
+ adds the symbols found to sym_return_val. Arguments are as in
+ make_symbol_overload_list. */
+
+static void
+make_symbol_overload_list_using (const char *func_name,
+ const char *the_namespace)
+{
+ struct using_direct *current;
+ const struct block *block;
+
+ /* First, go through the using directives. If any of them apply,
+ look in the appropriate namespaces for new functions to match
+ on. */
+
+ for (block = get_selected_block (0);
+ block != NULL;
+ block = BLOCK_SUPERBLOCK (block))
+ for (current = block_using (block);
+ current != NULL;
+ current = current->next)
+ {
+ /* Prevent recursive calls. */
+ if (current->searched)
+ continue;
+
+ /* If this is a namespace alias or imported declaration ignore
+ it. */
+ if (current->alias != NULL || current->declaration != NULL)
+ continue;
+
+ if (strcmp (the_namespace, current->import_dest) == 0)
+ {
+ /* Mark this import as searched so that the recursive call
+ does not search it again. */
+ struct cleanup *old_chain;
+ current->searched = 1;
+ old_chain = make_cleanup (reset_directive_searched,
+ current);
+
+ make_symbol_overload_list_using (func_name,
+ current->import_src);
+
+ current->searched = 0;
+ discard_cleanups (old_chain);
+ }
+ }
+
+ /* Now, add names for this namespace. */
+ make_symbol_overload_list_namespace (func_name, the_namespace);
+}
+
+/* This does the bulk of the work of finding overloaded symbols.
+ FUNC_NAME is the name of the overloaded function we're looking for
+ (possibly including namespace info). */
+
+static void
+make_symbol_overload_list_qualified (const char *func_name)
+{
+ struct compunit_symtab *cust;
+ struct objfile *objfile;
+ const struct block *b, *surrounding_static_block = 0;
+
+ /* Look through the partial symtabs for all symbols which begin by
+ matching FUNC_NAME. Make sure we read that symbol table in. */
+
+ ALL_OBJFILES (objfile)
+ {
+ if (objfile->sf)
+ objfile->sf->qf->expand_symtabs_for_function (objfile, func_name);
}
/* Search upwards from currently selected frame (so that we can
complete on local vars. */
for (b = get_selected_block (0); b != NULL; b = BLOCK_SUPERBLOCK (b))
- {
- if (!BLOCK_SUPERBLOCK (b))
- {
- surrounding_static_block = b; /* For elimination of dups */
- }
-
- /* Also catch fields of types defined in this places which match our
- text string. Only complete on types visible from current context. */
+ make_symbol_overload_list_block (func_name, b);
- ALL_BLOCK_SYMBOLS (b, iter, sym)
- {
- overload_list_add_symbol (sym, oload_name);
- }
- }
+ surrounding_static_block = block_static_block (get_selected_block (0));
/* Go through the symtabs and check the externs and statics for
symbols which match. */
- ALL_SYMTABS (objfile, s)
+ ALL_COMPUNITS (objfile, cust)
{
QUIT;
- b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), GLOBAL_BLOCK);
- ALL_BLOCK_SYMBOLS (b, iter, sym)
- {
- overload_list_add_symbol (sym, oload_name);
- }
+ b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), GLOBAL_BLOCK);
+ make_symbol_overload_list_block (func_name, b);
}
- ALL_SYMTABS (objfile, s)
+ ALL_COMPUNITS (objfile, cust)
{
QUIT;
- b = BLOCKVECTOR_BLOCK (BLOCKVECTOR (s), STATIC_BLOCK);
+ b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), STATIC_BLOCK);
/* Don't do this block twice. */
if (b == surrounding_static_block)
continue;
- ALL_BLOCK_SYMBOLS (b, iter, sym)
- {
- overload_list_add_symbol (sym, oload_name);
- }
+ make_symbol_overload_list_block (func_name, b);
}
+}
+
+/* Lookup the rtti type for a class name. */
+
+struct type *
+cp_lookup_rtti_type (const char *name, struct block *block)
+{
+ struct symbol * rtti_sym;
+ struct type * rtti_type;
+
+ /* Use VAR_DOMAIN here as NAME may be a typedef. PR 18141, 18417.
+ Classes "live" in both STRUCT_DOMAIN and VAR_DOMAIN. */
+ rtti_sym = lookup_symbol (name, block, VAR_DOMAIN, NULL).symbol;
+
+ if (rtti_sym == NULL)
+ {
+ warning (_("RTTI symbol not found for class '%s'"), name);
+ return NULL;
+ }
+
+ if (SYMBOL_CLASS (rtti_sym) != LOC_TYPEDEF)
+ {
+ warning (_("RTTI symbol for class '%s' is not a type"), name);
+ return NULL;
+ }
+
+ rtti_type = check_typedef (SYMBOL_TYPE (rtti_sym));
+
+ switch (TYPE_CODE (rtti_type))
+ {
+ case TYPE_CODE_STRUCT:
+ break;
+ case TYPE_CODE_NAMESPACE:
+ /* chastain/2003-11-26: the symbol tables often contain fake
+ symbols for namespaces with the same name as the struct.
+ This warning is an indication of a bug in the lookup order
+ or a bug in the way that the symbol tables are populated. */
+ warning (_("RTTI symbol for class '%s' is a namespace"), name);
+ return NULL;
+ default:
+ warning (_("RTTI symbol for class '%s' has bad type"), name);
+ return NULL;
+ }
+
+ return rtti_type;
+}
+
+#ifdef HAVE_WORKING_FORK
+
+/* If nonzero, attempt to catch crashes in the demangler and print
+ useful debugging information. */
+
+static int catch_demangler_crashes = 1;
+
+/* Stack context and environment for demangler crash recovery. */
+
+static SIGJMP_BUF gdb_demangle_jmp_buf;
- xfree (oload_name);
+/* If nonzero, attempt to dump core from the signal handler. */
- return (sym_return_val);
+static int gdb_demangle_attempt_core_dump = 1;
+
+/* Signal handler for gdb_demangle. */
+
+static void
+gdb_demangle_signal_handler (int signo)
+{
+ if (gdb_demangle_attempt_core_dump)
+ {
+ if (fork () == 0)
+ dump_core ();
+
+ gdb_demangle_attempt_core_dump = 0;
+ }
+
+ SIGLONGJMP (gdb_demangle_jmp_buf, signo);
}
+#endif
+
+/* A wrapper for bfd_demangle. */
+
+char *
+gdb_demangle (const char *name, int options)
+{
+ char *result = NULL;
+ int crash_signal = 0;
+
+#ifdef HAVE_WORKING_FORK
+#if defined (HAVE_SIGACTION) && defined (SA_RESTART)
+ struct sigaction sa, old_sa;
+#else
+ sighandler_t ofunc;
+#endif
+ static int core_dump_allowed = -1;
+
+ if (core_dump_allowed == -1)
+ {
+ core_dump_allowed = can_dump_core (LIMIT_CUR);
+
+ if (!core_dump_allowed)
+ gdb_demangle_attempt_core_dump = 0;
+ }
+
+ if (catch_demangler_crashes)
+ {
+#if defined (HAVE_SIGACTION) && defined (SA_RESTART)
+ sa.sa_handler = gdb_demangle_signal_handler;
+ sigemptyset (&sa.sa_mask);
+#ifdef HAVE_SIGALTSTACK
+ sa.sa_flags = SA_ONSTACK;
+#else
+ sa.sa_flags = 0;
+#endif
+ sigaction (SIGSEGV, &sa, &old_sa);
+#else
+ ofunc = signal (SIGSEGV, gdb_demangle_signal_handler);
+#endif
+
+ crash_signal = SIGSETJMP (gdb_demangle_jmp_buf);
+ }
+#endif
+
+ if (crash_signal == 0)
+ result = bfd_demangle (NULL, name, options);
+
+#ifdef HAVE_WORKING_FORK
+ if (catch_demangler_crashes)
+ {
+#if defined (HAVE_SIGACTION) && defined (SA_RESTART)
+ sigaction (SIGSEGV, &old_sa, NULL);
+#else
+ signal (SIGSEGV, ofunc);
+#endif
+
+ if (crash_signal != 0)
+ {
+ static int error_reported = 0;
+
+ if (!error_reported)
+ {
+ char *short_msg, *long_msg;
+ struct cleanup *back_to;
+
+ short_msg = xstrprintf (_("unable to demangle '%s' "
+ "(demangler failed with signal %d)"),
+ name, crash_signal);
+ back_to = make_cleanup (xfree, short_msg);
+
+ long_msg = xstrprintf ("%s:%d: %s: %s", __FILE__, __LINE__,
+ "demangler-warning", short_msg);
+ make_cleanup (xfree, long_msg);
+
+ target_terminal_ours ();
+ begin_line ();
+ if (core_dump_allowed)
+ fprintf_unfiltered (gdb_stderr,
+ _("%s\nAttempting to dump core.\n"),
+ long_msg);
+ else
+ warn_cant_dump_core (long_msg);
+
+ demangler_warning (__FILE__, __LINE__, "%s", short_msg);
+
+ do_cleanups (back_to);
+
+ error_reported = 1;
+ }
+
+ result = NULL;
+ }
+ }
+#endif
+
+ return result;
+}
/* Don't allow just "maintenance cplus". */
static void
maint_cplus_command (char *arg, int from_tty)
{
- printf_unfiltered ("\"maintenance cplus\" must be followed by the name of a command.\n");
- help_list (maint_cplus_cmd_list, "maintenance cplus ", -1, gdb_stdout);
+ printf_unfiltered (_("\"maintenance cplus\" must be followed "
+ "by the name of a command.\n"));
+ help_list (maint_cplus_cmd_list,
+ "maintenance cplus ",
+ all_commands, gdb_stdout);
}
/* This is a front end for cp_find_first_component, for unit testing.
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 = (char *) alloca (len + 1);
memcpy (prefix, arg, len);
prefix[len] = '\0';
extern initialize_file_ftype _initialize_cp_support; /* -Wmissing-prototypes */
+
+/* Implement "info vtbl". */
+
+static void
+info_vtbl_command (char *arg, int from_tty)
+{
+ struct value *value;
+
+ value = parse_and_eval (arg);
+ cplus_print_vtable (value);
+}
+
void
_initialize_cp_support (void)
{
- add_prefix_cmd ("cplus", class_maintenance, maint_cplus_command,
- "C++ maintenance commands.", &maint_cplus_cmd_list,
- "maintenance cplus ", 0, &maintenancelist);
- add_alias_cmd ("cp", "cplus", class_maintenance, 1, &maintenancelist);
-
- add_cmd ("first_component", class_maintenance, first_component_command,
- "Print the first class/namespace component of NAME.",
+ add_prefix_cmd ("cplus", class_maintenance,
+ maint_cplus_command,
+ _("C++ maintenance commands."),
+ &maint_cplus_cmd_list,
+ "maintenance cplus ",
+ 0, &maintenancelist);
+ add_alias_cmd ("cp", "cplus",
+ class_maintenance, 1,
+ &maintenancelist);
+
+ add_cmd ("first_component",
+ class_maintenance,
+ first_component_command,
+ _("Print the first class/namespace component of NAME."),
&maint_cplus_cmd_list);
-
+
+ add_info ("vtbl", info_vtbl_command,
+ _("Show the virtual function table for a C++ object.\n\
+Usage: info vtbl EXPRESSION\n\
+Evaluate EXPRESSION and display the virtual function table for the\n\
+resulting object."));
+
+#ifdef HAVE_WORKING_FORK
+ add_setshow_boolean_cmd ("catch-demangler-crashes", class_maintenance,
+ &catch_demangler_crashes, _("\
+Set whether to attempt to catch demangler crashes."), _("\
+Show whether to attempt to catch demangler crashes."), _("\
+If enabled GDB will attempt to catch demangler crashes and\n\
+display the offending symbol."),
+ NULL,
+ NULL,
+ &maintenance_set_cmdlist,
+ &maintenance_show_cmdlist);
+#endif
}