mirror of
https://sourceware.org/git/binutils-gdb.git
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492d29ea1c
This patch splits the TRY_CATCH macro into three, so that we go from this: ~~~ volatile gdb_exception ex; TRY_CATCH (ex, RETURN_MASK_ERROR) { } if (ex.reason < 0) { } ~~~ to this: ~~~ TRY { } CATCH (ex, RETURN_MASK_ERROR) { } END_CATCH ~~~ Thus, we'll be getting rid of the local volatile exception object, and declaring the caught exception in the catch block. This allows reimplementing TRY/CATCH in terms of C++ exceptions when building in C++ mode, while still allowing to build GDB in C mode (using setjmp/longjmp), as a transition step. TBC, after this patch, is it _not_ valid to have code between the TRY and the CATCH blocks, like: TRY { } // some code here. CATCH (ex, RETURN_MASK_ERROR) { } END_CATCH Just like it isn't valid to do that with C++'s native try/catch. By switching to creating the exception object inside the CATCH block scope, we can get rid of all the explicitly allocated volatile exception objects all over the tree, and map the CATCH block more directly to C++'s catch blocks. The majority of the TRY_CATCH -> TRY+CATCH+END_CATCH conversion was done with a script, rerun from scratch at every rebase, no manual editing involved. After the mechanical conversion, a few places needed manual intervention, to fix preexisting cases where we were using the exception object outside of the TRY_CATCH block, and cases where we were using "else" after a 'if (ex.reason) < 0)' [a CATCH after this patch]. The result was folded into this patch so that GDB still builds at each incremental step. END_CATCH is necessary for two reasons: First, because we name the exception object in the CATCH block, which requires creating a scope, which in turn must be closed somewhere. Declaring the exception variable in the initializer field of a for block, like: #define CATCH(EXCEPTION, mask) \ for (struct gdb_exception EXCEPTION; \ exceptions_state_mc_catch (&EXCEPTION, MASK); \ EXCEPTION = exception_none) would avoid needing END_CATCH, but alas, in C mode, we build with C90, which doesn't allow mixed declarations and code. Second, because when TRY/CATCH are wired to real C++ try/catch, as long as we need to handle cleanup chains, even if there's no CATCH block that wants to catch the exception, we need for stop at every frame in the unwind chain and run cleanups, then rethrow. That will be done in END_CATCH. After we require C++, we'll still need TRY/CATCH/END_CATCH until cleanups are completely phased out -- TRY/CATCH in C++ mode will save/restore the current cleanup chain, like in C mode, and END_CATCH catches otherwise uncaugh exceptions, runs cleanups and rethrows, so that C++ cleanups and exceptions can coexist. IMO, this still makes the TRY/CATCH code look a bit more like a newcomer would expect, so IMO worth it even if we weren't considering C++. gdb/ChangeLog. 2015-03-07 Pedro Alves <palves@redhat.com> * common/common-exceptions.c (struct catcher) <exception>: No longer a pointer to volatile exception. Now an exception value. <mask>: Delete field. (exceptions_state_mc_init): Remove all parameters. Adjust. (exceptions_state_mc): No longer pop the catcher here. (exceptions_state_mc_catch): New function. (throw_exception): Adjust. * common/common-exceptions.h (exceptions_state_mc_init): Remove all parameters. (exceptions_state_mc_catch): Declare. (TRY_CATCH): Rename to ... (TRY): ... this. Remove EXCEPTION and MASK parameters. (CATCH, END_CATCH): New. All callers adjusted. gdb/gdbserver/ChangeLog: 2015-03-07 Pedro Alves <palves@redhat.com> Adjust all callers of TRY_CATCH to use TRY/CATCH/END_CATCH instead.
1707 lines
45 KiB
C
1707 lines
45 KiB
C
/* Helper routines for C++ support in GDB.
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Copyright (C) 2002-2015 Free Software Foundation, Inc.
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Contributed by MontaVista Software.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "cp-support.h"
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#include "demangle.h"
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#include "gdbcmd.h"
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#include "dictionary.h"
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#include "objfiles.h"
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#include "frame.h"
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#include "symtab.h"
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#include "block.h"
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#include "complaints.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "value.h"
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#include "cp-abi.h"
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#include <signal.h>
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#include "safe-ctype.h"
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#define d_left(dc) (dc)->u.s_binary.left
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#define d_right(dc) (dc)->u.s_binary.right
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/* Functions related to demangled name parsing. */
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static unsigned int cp_find_first_component_aux (const char *name,
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int permissive);
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static void demangled_name_complaint (const char *name);
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/* Functions/variables related to overload resolution. */
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static int sym_return_val_size = -1;
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static int sym_return_val_index;
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static struct symbol **sym_return_val;
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static void overload_list_add_symbol (struct symbol *sym,
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const char *oload_name);
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static void make_symbol_overload_list_using (const char *func_name,
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const char *the_namespace);
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static void make_symbol_overload_list_qualified (const char *func_name);
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/* The list of "maint cplus" commands. */
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struct cmd_list_element *maint_cplus_cmd_list = NULL;
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/* The actual commands. */
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static void maint_cplus_command (char *arg, int from_tty);
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static void first_component_command (char *arg, int from_tty);
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/* A list of typedefs which should not be substituted by replace_typedefs. */
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static const char * const ignore_typedefs[] =
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{
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"std::istream", "std::iostream", "std::ostream", "std::string"
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};
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static void
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replace_typedefs (struct demangle_parse_info *info,
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struct demangle_component *ret_comp,
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canonicalization_ftype *finder,
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void *data);
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/* A convenience function to copy STRING into OBSTACK, returning a pointer
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to the newly allocated string and saving the number of bytes saved in LEN.
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It does not copy the terminating '\0' byte! */
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static char *
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copy_string_to_obstack (struct obstack *obstack, const char *string,
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long *len)
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{
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*len = strlen (string);
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return obstack_copy (obstack, string, *len);
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}
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/* A cleanup wrapper for cp_demangled_name_parse_free. */
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static void
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do_demangled_name_parse_free_cleanup (void *data)
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{
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struct demangle_parse_info *info = (struct demangle_parse_info *) data;
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cp_demangled_name_parse_free (info);
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}
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/* Create a cleanup for C++ name parsing. */
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struct cleanup *
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make_cleanup_cp_demangled_name_parse_free (struct demangle_parse_info *info)
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{
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return make_cleanup (do_demangled_name_parse_free_cleanup, info);
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}
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/* Return 1 if STRING is clearly already in canonical form. This
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function is conservative; things which it does not recognize are
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assumed to be non-canonical, and the parser will sort them out
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afterwards. This speeds up the critical path for alphanumeric
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identifiers. */
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static int
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cp_already_canonical (const char *string)
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{
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/* Identifier start character [a-zA-Z_]. */
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if (!ISIDST (string[0]))
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return 0;
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/* These are the only two identifiers which canonicalize to other
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than themselves or an error: unsigned -> unsigned int and
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signed -> int. */
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if (string[0] == 'u' && strcmp (&string[1], "nsigned") == 0)
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return 0;
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else if (string[0] == 's' && strcmp (&string[1], "igned") == 0)
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return 0;
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/* Identifier character [a-zA-Z0-9_]. */
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while (ISIDNUM (string[1]))
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string++;
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if (string[1] == '\0')
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return 1;
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else
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return 0;
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}
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/* Inspect the given RET_COMP for its type. If it is a typedef,
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replace the node with the typedef's tree.
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Returns 1 if any typedef substitutions were made, 0 otherwise. */
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static int
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inspect_type (struct demangle_parse_info *info,
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struct demangle_component *ret_comp,
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canonicalization_ftype *finder,
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void *data)
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{
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int i;
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char *name;
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struct symbol *sym;
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/* Copy the symbol's name from RET_COMP and look it up
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in the symbol table. */
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name = (char *) alloca (ret_comp->u.s_name.len + 1);
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memcpy (name, ret_comp->u.s_name.s, ret_comp->u.s_name.len);
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name[ret_comp->u.s_name.len] = '\0';
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/* Ignore any typedefs that should not be substituted. */
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for (i = 0; i < ARRAY_SIZE (ignore_typedefs); ++i)
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{
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if (strcmp (name, ignore_typedefs[i]) == 0)
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return 0;
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}
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sym = NULL;
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TRY
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{
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sym = lookup_symbol (name, 0, VAR_DOMAIN, 0);
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}
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CATCH (except, RETURN_MASK_ALL)
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{
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return 0;
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}
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END_CATCH
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if (sym != NULL)
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{
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struct type *otype = SYMBOL_TYPE (sym);
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if (finder != NULL)
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{
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const char *new_name = (*finder) (otype, data);
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if (new_name != NULL)
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{
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ret_comp->u.s_name.s = new_name;
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ret_comp->u.s_name.len = strlen (new_name);
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return 1;
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}
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return 0;
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}
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/* If the type is a typedef or namespace alias, replace it. */
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if (TYPE_CODE (otype) == TYPE_CODE_TYPEDEF
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|| TYPE_CODE (otype) == TYPE_CODE_NAMESPACE)
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{
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long len;
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int is_anon;
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struct type *type;
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struct demangle_parse_info *i;
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struct ui_file *buf;
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/* Get the real type of the typedef. */
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type = check_typedef (otype);
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/* If the symbol is a namespace and its type name is no different
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than the name we looked up, this symbol is not a namespace
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alias and does not need to be substituted. */
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if (TYPE_CODE (otype) == TYPE_CODE_NAMESPACE
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&& strcmp (TYPE_NAME (type), name) == 0)
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return 0;
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is_anon = (TYPE_TAG_NAME (type) == NULL
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&& (TYPE_CODE (type) == TYPE_CODE_ENUM
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|| TYPE_CODE (type) == TYPE_CODE_STRUCT
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|| TYPE_CODE (type) == TYPE_CODE_UNION));
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if (is_anon)
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{
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struct type *last = otype;
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/* Find the last typedef for the type. */
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while (TYPE_TARGET_TYPE (last) != NULL
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&& (TYPE_CODE (TYPE_TARGET_TYPE (last))
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== TYPE_CODE_TYPEDEF))
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last = TYPE_TARGET_TYPE (last);
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/* If there is only one typedef for this anonymous type,
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do not substitute it. */
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if (type == otype)
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return 0;
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else
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/* Use the last typedef seen as the type for this
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anonymous type. */
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type = last;
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}
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buf = mem_fileopen ();
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TRY
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{
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type_print (type, "", buf, -1);
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}
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/* If type_print threw an exception, there is little point
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in continuing, so just bow out gracefully. */
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CATCH (except, RETURN_MASK_ERROR)
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{
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ui_file_delete (buf);
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return 0;
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}
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END_CATCH
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name = ui_file_obsavestring (buf, &info->obstack, &len);
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ui_file_delete (buf);
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/* Turn the result into a new tree. Note that this
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tree will contain pointers into NAME, so NAME cannot
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be free'd until all typedef conversion is done and
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the final result is converted into a string. */
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i = cp_demangled_name_to_comp (name, NULL);
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if (i != NULL)
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{
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/* Merge the two trees. */
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cp_merge_demangle_parse_infos (info, ret_comp, i);
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/* Replace any newly introduced typedefs -- but not
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if the type is anonymous (that would lead to infinite
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looping). */
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if (!is_anon)
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replace_typedefs (info, ret_comp, finder, data);
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}
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else
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{
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/* This shouldn't happen unless the type printer has
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output something that the name parser cannot grok.
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Nonetheless, an ounce of prevention...
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Canonicalize the name again, and store it in the
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current node (RET_COMP). */
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char *canon = cp_canonicalize_string_no_typedefs (name);
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if (canon != NULL)
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{
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/* Copy the canonicalization into the obstack and
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free CANON. */
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name = copy_string_to_obstack (&info->obstack, canon, &len);
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xfree (canon);
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}
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ret_comp->u.s_name.s = name;
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ret_comp->u.s_name.len = len;
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}
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return 1;
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}
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}
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return 0;
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}
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/* Replace any typedefs appearing in the qualified name
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(DEMANGLE_COMPONENT_QUAL_NAME) represented in RET_COMP for the name parse
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given in INFO. */
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static void
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replace_typedefs_qualified_name (struct demangle_parse_info *info,
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struct demangle_component *ret_comp,
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canonicalization_ftype *finder,
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void *data)
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{
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long len;
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char *name;
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struct ui_file *buf = mem_fileopen ();
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struct demangle_component *comp = ret_comp;
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/* Walk each node of the qualified name, reconstructing the name of
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this element. With every node, check for any typedef substitutions.
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If a substitution has occurred, replace the qualified name node
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with a DEMANGLE_COMPONENT_NAME node representing the new, typedef-
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substituted name. */
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while (comp->type == DEMANGLE_COMPONENT_QUAL_NAME)
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{
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if (d_left (comp)->type == DEMANGLE_COMPONENT_NAME)
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{
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struct demangle_component newobj;
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ui_file_write (buf, d_left (comp)->u.s_name.s,
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d_left (comp)->u.s_name.len);
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name = ui_file_obsavestring (buf, &info->obstack, &len);
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newobj.type = DEMANGLE_COMPONENT_NAME;
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newobj.u.s_name.s = name;
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newobj.u.s_name.len = len;
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if (inspect_type (info, &newobj, finder, data))
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{
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char *n, *s;
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long slen;
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/* A typedef was substituted in NEW. Convert it to a
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string and replace the top DEMANGLE_COMPONENT_QUAL_NAME
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node. */
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ui_file_rewind (buf);
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n = cp_comp_to_string (&newobj, 100);
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if (n == NULL)
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{
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/* If something went astray, abort typedef substitutions. */
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ui_file_delete (buf);
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return;
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}
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s = copy_string_to_obstack (&info->obstack, n, &slen);
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xfree (n);
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d_left (ret_comp)->type = DEMANGLE_COMPONENT_NAME;
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d_left (ret_comp)->u.s_name.s = s;
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d_left (ret_comp)->u.s_name.len = slen;
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d_right (ret_comp) = d_right (comp);
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comp = ret_comp;
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continue;
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}
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}
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else
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{
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/* The current node is not a name, so simply replace any
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typedefs in it. Then print it to the stream to continue
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checking for more typedefs in the tree. */
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replace_typedefs (info, d_left (comp), finder, data);
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name = cp_comp_to_string (d_left (comp), 100);
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if (name == NULL)
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{
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/* If something went astray, abort typedef substitutions. */
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ui_file_delete (buf);
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return;
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}
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fputs_unfiltered (name, buf);
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xfree (name);
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}
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ui_file_write (buf, "::", 2);
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comp = d_right (comp);
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}
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/* If the next component is DEMANGLE_COMPONENT_NAME, save the qualified
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name assembled above and append the name given by COMP. Then use this
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reassembled name to check for a typedef. */
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if (comp->type == DEMANGLE_COMPONENT_NAME)
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{
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ui_file_write (buf, comp->u.s_name.s, comp->u.s_name.len);
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name = ui_file_obsavestring (buf, &info->obstack, &len);
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/* Replace the top (DEMANGLE_COMPONENT_QUAL_NAME) node
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with a DEMANGLE_COMPONENT_NAME node containing the whole
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name. */
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ret_comp->type = DEMANGLE_COMPONENT_NAME;
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ret_comp->u.s_name.s = name;
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ret_comp->u.s_name.len = len;
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inspect_type (info, ret_comp, finder, data);
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}
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else
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replace_typedefs (info, comp, finder, data);
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ui_file_delete (buf);
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}
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/* A function to check const and volatile qualifiers for argument types.
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"Parameter declarations that differ only in the presence
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or absence of `const' and/or `volatile' are equivalent."
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C++ Standard N3290, clause 13.1.3 #4. */
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static void
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check_cv_qualifiers (struct demangle_component *ret_comp)
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{
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while (d_left (ret_comp) != NULL
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&& (d_left (ret_comp)->type == DEMANGLE_COMPONENT_CONST
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|| d_left (ret_comp)->type == DEMANGLE_COMPONENT_VOLATILE))
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{
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d_left (ret_comp) = d_left (d_left (ret_comp));
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}
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}
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/* Walk the parse tree given by RET_COMP, replacing any typedefs with
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their basic types. */
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static void
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replace_typedefs (struct demangle_parse_info *info,
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struct demangle_component *ret_comp,
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canonicalization_ftype *finder,
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void *data)
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{
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if (ret_comp)
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{
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if (finder != NULL
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&& (ret_comp->type == DEMANGLE_COMPONENT_NAME
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|| ret_comp->type == DEMANGLE_COMPONENT_QUAL_NAME
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|| ret_comp->type == DEMANGLE_COMPONENT_TEMPLATE
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|| ret_comp->type == DEMANGLE_COMPONENT_BUILTIN_TYPE))
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{
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char *local_name = cp_comp_to_string (ret_comp, 10);
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if (local_name != NULL)
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{
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struct symbol *sym = NULL;
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sym = NULL;
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TRY
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{
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sym = lookup_symbol (local_name, 0, VAR_DOMAIN, 0);
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}
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CATCH (except, RETURN_MASK_ALL)
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{
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}
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END_CATCH
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xfree (local_name);
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|
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if (sym != NULL)
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{
|
|
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 *
|
|
cp_canonicalize_string_full (const char *string,
|
|
canonicalization_ftype *finder,
|
|
void *data)
|
|
{
|
|
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;
|
|
|
|
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)
|
|
{
|
|
/* 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;
|
|
|
|
if (demangled_name == NULL)
|
|
return NULL;
|
|
|
|
info = cp_demangled_name_to_comp (demangled_name, NULL);
|
|
if (info == NULL)
|
|
return NULL;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
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
|
|
boundary of the first component: so, given 'A::foo' or 'A::B::foo'
|
|
it returns the 1, and given 'foo', it returns 0. */
|
|
|
|
/* The character in NAME indexed by the return value is guaranteed to
|
|
always be either ':' or '\0'. */
|
|
|
|
/* NOTE: carlton/2003-03-13: This function is currently only intended
|
|
for internal use: it's probably not entirely safe when called on
|
|
user-generated input, because some of the 'index += 2' lines in
|
|
cp_find_first_component_aux might go past the end of malformed
|
|
input. */
|
|
|
|
unsigned int
|
|
cp_find_first_component (const char *name)
|
|
{
|
|
return cp_find_first_component_aux (name, 0);
|
|
}
|
|
|
|
/* Helper function for cp_find_first_component. Like that function,
|
|
it returns the length of the first component of NAME, but to make
|
|
the recursion easier, it also stops if it reaches an unexpected ')'
|
|
or '>' if the value of PERMISSIVE is nonzero. */
|
|
|
|
/* Let's optimize away calls to strlen("operator"). */
|
|
|
|
#define LENGTH_OF_OPERATOR 8
|
|
|
|
static unsigned int
|
|
cp_find_first_component_aux (const char *name, int permissive)
|
|
{
|
|
unsigned int index = 0;
|
|
/* Operator names can show up in unexpected places. Since these can
|
|
contain parentheses or angle brackets, they can screw up the
|
|
recursion. But not every string 'operator' is part of an
|
|
operater name: e.g. you could have a variable 'cooperator'. So
|
|
this variable tells us whether or not we should treat the string
|
|
'operator' as starting an operator. */
|
|
int operator_possible = 1;
|
|
|
|
for (;; ++index)
|
|
{
|
|
switch (name[index])
|
|
{
|
|
case '<':
|
|
/* Template; eat it up. The calls to cp_first_component
|
|
should only return (I hope!) when they reach the '>'
|
|
terminating the component or a '::' between two
|
|
components. (Hence the '+ 2'.) */
|
|
index += 1;
|
|
for (index += cp_find_first_component_aux (name + index, 1);
|
|
name[index] != '>';
|
|
index += cp_find_first_component_aux (name + index, 1))
|
|
{
|
|
if (name[index] != ':')
|
|
{
|
|
demangled_name_complaint (name);
|
|
return strlen (name);
|
|
}
|
|
index += 2;
|
|
}
|
|
operator_possible = 1;
|
|
break;
|
|
case '(':
|
|
/* Similar comment as to '<'. */
|
|
index += 1;
|
|
for (index += cp_find_first_component_aux (name + index, 1);
|
|
name[index] != ')';
|
|
index += cp_find_first_component_aux (name + index, 1))
|
|
{
|
|
if (name[index] != ':')
|
|
{
|
|
demangled_name_complaint (name);
|
|
return strlen (name);
|
|
}
|
|
index += 2;
|
|
}
|
|
operator_possible = 1;
|
|
break;
|
|
case '>':
|
|
case ')':
|
|
if (permissive)
|
|
return index;
|
|
else
|
|
{
|
|
demangled_name_complaint (name);
|
|
return strlen (name);
|
|
}
|
|
case '\0':
|
|
case ':':
|
|
return index;
|
|
case 'o':
|
|
/* Operator names can screw up the recursion. */
|
|
if (operator_possible
|
|
&& strncmp (name + index, "operator",
|
|
LENGTH_OF_OPERATOR) == 0)
|
|
{
|
|
index += LENGTH_OF_OPERATOR;
|
|
while (ISSPACE(name[index]))
|
|
++index;
|
|
switch (name[index])
|
|
{
|
|
/* Skip over one less than the appropriate number of
|
|
characters: the for loop will skip over the last
|
|
one. */
|
|
case '<':
|
|
if (name[index + 1] == '<')
|
|
index += 1;
|
|
else
|
|
index += 0;
|
|
break;
|
|
case '>':
|
|
case '-':
|
|
if (name[index + 1] == '>')
|
|
index += 1;
|
|
else
|
|
index += 0;
|
|
break;
|
|
case '(':
|
|
index += 1;
|
|
break;
|
|
default:
|
|
index += 0;
|
|
break;
|
|
}
|
|
}
|
|
operator_possible = 0;
|
|
break;
|
|
case ' ':
|
|
case ',':
|
|
case '.':
|
|
case '&':
|
|
case '*':
|
|
/* NOTE: carlton/2003-04-18: I'm not sure what the precise
|
|
set of relevant characters are here: it's necessary to
|
|
include any character that can show up before 'operator'
|
|
in a demangled name, and it's safe to include any
|
|
character that can't be part of an identifier's name. */
|
|
operator_possible = 1;
|
|
break;
|
|
default:
|
|
operator_possible = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Complain about a demangled name that we don't know how to parse.
|
|
NAME is the demangled name in question. */
|
|
|
|
static void
|
|
demangled_name_complaint (const char *name)
|
|
{
|
|
complaint (&symfile_complaints,
|
|
"unexpected demangled name '%s'", name);
|
|
}
|
|
|
|
/* If NAME is the fully-qualified name of a C++
|
|
function/variable/method/etc., this returns the length of its
|
|
entire prefix: all of the namespaces and classes that make up its
|
|
name. Given 'A::foo', it returns 1, given 'A::B::foo', it returns
|
|
4, given 'foo', it returns 0. */
|
|
|
|
unsigned int
|
|
cp_entire_prefix_len (const char *name)
|
|
{
|
|
unsigned int current_len = cp_find_first_component (name);
|
|
unsigned int previous_len = 0;
|
|
|
|
while (name[current_len] != '\0')
|
|
{
|
|
gdb_assert (name[current_len] == ':');
|
|
previous_len = current_len;
|
|
/* Skip the '::'. */
|
|
current_len += 2;
|
|
current_len += cp_find_first_component (name + current_len);
|
|
}
|
|
|
|
return previous_len;
|
|
}
|
|
|
|
/* Overload resolution functions. */
|
|
|
|
/* 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,
|
|
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 (SYMBOL_TYPE (sym) == NULL)
|
|
return;
|
|
|
|
/* skip any symbols that we've already considered. */
|
|
for (i = 0; i < sym_return_val_index; ++i)
|
|
if (strcmp (SYMBOL_LINKAGE_NAME (sym),
|
|
SYMBOL_LINKAGE_NAME (sym_return_val[i])) == 0)
|
|
return;
|
|
|
|
/* Get the demangled name without parameters */
|
|
sym_name = cp_remove_params (SYMBOL_NATURAL_NAME (sym));
|
|
if (!sym_name)
|
|
return;
|
|
|
|
/* skip symbols that cannot match */
|
|
if (strcmp (sym_name, oload_name) != 0)
|
|
{
|
|
xfree (sym_name);
|
|
return;
|
|
}
|
|
|
|
xfree (sym_name);
|
|
|
|
/* 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[sym_return_val_index++] = sym;
|
|
sym_return_val[sym_return_val_index] = NULL;
|
|
}
|
|
|
|
/* Return a null-terminated list of pointers to function symbols that
|
|
are named FUNC_NAME and are visible within NAMESPACE. */
|
|
|
|
struct symbol **
|
|
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 = xmalloc ((sym_return_val_size + 1) *
|
|
sizeof (struct symbol *));
|
|
sym_return_val[0] = NULL;
|
|
|
|
old_cleanups = make_cleanup (xfree, sym_return_val);
|
|
|
|
make_symbol_overload_list_using (func_name, the_namespace);
|
|
|
|
if (the_namespace[0] == '\0')
|
|
name = func_name;
|
|
else
|
|
{
|
|
char *concatenated_name
|
|
= 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
|
|
= 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 = 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);
|
|
}
|
|
|
|
/* 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 = 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))
|
|
make_symbol_overload_list_block (func_name, b);
|
|
|
|
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_COMPUNITS (objfile, cust)
|
|
{
|
|
QUIT;
|
|
b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), GLOBAL_BLOCK);
|
|
make_symbol_overload_list_block (func_name, b);
|
|
}
|
|
|
|
ALL_COMPUNITS (objfile, cust)
|
|
{
|
|
QUIT;
|
|
b = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust), STATIC_BLOCK);
|
|
/* Don't do this block twice. */
|
|
if (b == surrounding_static_block)
|
|
continue;
|
|
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;
|
|
|
|
rtti_sym = lookup_symbol (name, block, STRUCT_DOMAIN, NULL);
|
|
|
|
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 = 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;
|
|
|
|
/* If nonzero, attempt to dump core from the signal handler. */
|
|
|
|
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
|
|
void (*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 = (void (*)()) 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 ",
|
|
all_commands, gdb_stdout);
|
|
}
|
|
|
|
/* This is a front end for cp_find_first_component, for unit testing.
|
|
Be careful when using it: see the NOTE above
|
|
cp_find_first_component. */
|
|
|
|
static void
|
|
first_component_command (char *arg, int from_tty)
|
|
{
|
|
int len;
|
|
char *prefix;
|
|
|
|
if (!arg)
|
|
return;
|
|
|
|
len = cp_find_first_component (arg);
|
|
prefix = alloca (len + 1);
|
|
|
|
memcpy (prefix, arg, len);
|
|
prefix[len] = '\0';
|
|
|
|
printf_unfiltered ("%s\n", prefix);
|
|
}
|
|
|
|
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."),
|
|
&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
|
|
}
|