1 /* Demangler for IA64 / g++ V3 ABI.
2 Copyright (C) 2000, 2001 Free Software Foundation, Inc.
3 Written by Alex Samuel <samuel@codesourcery.com>.
5 This file is part of GNU CC.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 /* This file implements demangling of C++ names mangled according to
23 the IA64 / g++ V3 ABI. Use the cp_demangle function to
24 demangle a mangled name, or compile with the preprocessor macro
25 STANDALONE_DEMANGLER defined to create a demangling filter
26 executable (functionally similar to c++filt, but includes this
33 #include <sys/types.h>
46 #include "libiberty.h"
47 #include "dyn-string.h"
50 /* If CP_DEMANGLE_DEBUG is defined, a trace of the grammar evaluation,
51 and other debugging output, will be generated. */
52 #ifdef CP_DEMANGLE_DEBUG
53 #define DEMANGLE_TRACE(PRODUCTION, DM) \
54 fprintf (stderr, " -> %-24s at position %3d\n", \
55 (PRODUCTION), current_position (DM));
57 #define DEMANGLE_TRACE(PRODUCTION, DM)
60 /* Don't include <ctype.h>, to prevent additional unresolved symbols
61 from being dragged into the C++ runtime library. */
62 #define IS_DIGIT(CHAR) ((CHAR) >= '0' && (CHAR) <= '9')
63 #define IS_ALPHA(CHAR) \
64 (((CHAR) >= 'a' && (CHAR) <= 'z') \
65 || ((CHAR) >= 'A' && (CHAR) <= 'Z'))
67 /* The prefix prepended by GCC to an identifier represnting the
68 anonymous namespace. */
69 #define ANONYMOUS_NAMESPACE_PREFIX "_GLOBAL_"
71 /* Character(s) to use for namespace separation in demangled output */
72 #define NAMESPACE_SEPARATOR (dm->style == DMGL_JAVA ? "." : "::")
74 /* If flag_verbose is zero, some simplifications will be made to the
75 output to make it easier to read and supress details that are
76 generally not of interest to the average C++ programmer.
77 Otherwise, the demangled representation will attempt to convey as
78 much information as the mangled form. */
79 static int flag_verbose;
81 /* If flag_strict is non-zero, demangle strictly according to the
82 specification -- don't demangle special g++ manglings. */
83 static int flag_strict;
85 /* String_list_t is an extended form of dyn_string_t which provides a
86 link field and a caret position for additions to the string. A
87 string_list_t may safely be cast to and used as a dyn_string_t. */
89 struct string_list_def
91 /* The dyn_string; must be first. */
92 struct dyn_string string;
94 /* The position at which additional text is added to this string
95 (using the result_add* macros). This value is an offset from the
96 end of the string, not the beginning (and should be
100 /* The next string in the list. */
101 struct string_list_def *next;
104 typedef struct string_list_def *string_list_t;
106 /* Data structure representing a potential substitution. */
108 struct substitution_def
110 /* The demangled text of the substitution. */
113 /* Whether this substitution represents a template item. */
117 /* Data structure representing a template argument list. */
119 struct template_arg_list_def
121 /* The next (lower) template argument list in the stack of currently
122 active template arguments. */
123 struct template_arg_list_def *next;
125 /* The first element in the list of template arguments in
126 left-to-right order. */
127 string_list_t first_argument;
129 /* The last element in the arguments lists. */
130 string_list_t last_argument;
133 typedef struct template_arg_list_def *template_arg_list_t;
135 /* Data structure to maintain the state of the current demangling. */
137 struct demangling_def
139 /* The full mangled name being mangled. */
142 /* Pointer into name at the current position. */
145 /* Stack for strings containing demangled result generated so far.
146 Text is emitted to the topmost (first) string. */
147 string_list_t result;
149 /* The number of presently available substitutions. */
150 int num_substitutions;
152 /* The allocated size of the substitutions array. */
153 int substitutions_allocated;
155 /* An array of available substitutions. The number of elements in
156 the array is given by num_substitions, and the allocated array
157 size in substitutions_size.
159 The most recent substition is at the end, so
161 - `S_' corresponds to substititutions[num_substitutions - 1]
162 - `S0_' corresponds to substititutions[num_substitutions - 2]
165 struct substitution_def *substitutions;
167 /* The stack of template argument lists. */
168 template_arg_list_t template_arg_lists;
170 /* The most recently demangled source-name. */
171 dyn_string_t last_source_name;
173 /* Language style to use for demangled output. */
176 /* Set to non-zero iff this name is a constructor. The actual value
177 indicates what sort of constructor this is; see demangle.h. */
178 enum gnu_v3_ctor_kinds is_constructor;
180 /* Set to non-zero iff this name is a destructor. The actual value
181 indicates what sort of destructor this is; see demangle.h. */
182 enum gnu_v3_dtor_kinds is_destructor;
186 typedef struct demangling_def *demangling_t;
188 /* This type is the standard return code from most functions. Values
189 other than STATUS_OK contain descriptive messages. */
190 typedef const char *status_t;
192 /* Special values that can be used as a status_t. */
193 #define STATUS_OK NULL
194 #define STATUS_ERROR "Error."
195 #define STATUS_UNIMPLEMENTED "Unimplemented."
196 #define STATUS_INTERNAL_ERROR "Internal error."
198 /* This status code indicates a failure in malloc or realloc. */
199 static const char *const status_allocation_failed = "Allocation failed.";
200 #define STATUS_ALLOCATION_FAILED status_allocation_failed
202 /* Non-zero if STATUS indicates that no error has occurred. */
203 #define STATUS_NO_ERROR(STATUS) ((STATUS) == STATUS_OK)
205 /* Evaluate EXPR, which must produce a status_t. If the status code
206 indicates an error, return from the current function with that
208 #define RETURN_IF_ERROR(EXPR) \
212 if (!STATUS_NO_ERROR (s)) \
217 static status_t int_to_dyn_string
218 PARAMS ((int, dyn_string_t));
219 static string_list_t string_list_new
221 static void string_list_delete
222 PARAMS ((string_list_t));
223 static status_t result_add_separated_char
224 PARAMS ((demangling_t, int));
225 static status_t result_push
226 PARAMS ((demangling_t));
227 static string_list_t result_pop
228 PARAMS ((demangling_t));
229 static int substitution_start
230 PARAMS ((demangling_t));
231 static status_t substitution_add
232 PARAMS ((demangling_t, int, int));
233 static dyn_string_t substitution_get
234 PARAMS ((demangling_t, int, int *));
235 #ifdef CP_DEMANGLE_DEBUG
236 static void substitutions_print
237 PARAMS ((demangling_t, FILE *));
239 static template_arg_list_t template_arg_list_new
241 static void template_arg_list_delete
242 PARAMS ((template_arg_list_t));
243 static void template_arg_list_add_arg
244 PARAMS ((template_arg_list_t, string_list_t));
245 static string_list_t template_arg_list_get_arg
246 PARAMS ((template_arg_list_t, int));
247 static void push_template_arg_list
248 PARAMS ((demangling_t, template_arg_list_t));
249 static void pop_to_template_arg_list
250 PARAMS ((demangling_t, template_arg_list_t));
251 #ifdef CP_DEMANGLE_DEBUG
252 static void template_arg_list_print
253 PARAMS ((template_arg_list_t, FILE *));
255 static template_arg_list_t current_template_arg_list
256 PARAMS ((demangling_t));
257 static demangling_t demangling_new
258 PARAMS ((const char *, int));
259 static void demangling_delete
260 PARAMS ((demangling_t));
262 /* The last character of DS. Warning: DS is evaluated twice. */
263 #define dyn_string_last_char(DS) \
264 (dyn_string_buf (DS)[dyn_string_length (DS) - 1])
266 /* Append a space character (` ') to DS if it does not already end
267 with one. Evaluates to 1 on success, or 0 on allocation failure. */
268 #define dyn_string_append_space(DS) \
269 ((dyn_string_length (DS) > 0 \
270 && dyn_string_last_char (DS) != ' ') \
271 ? dyn_string_append_char ((DS), ' ') \
274 /* Returns the index of the current position in the mangled name. */
275 #define current_position(DM) ((DM)->next - (DM)->name)
277 /* Returns the character at the current position of the mangled name. */
278 #define peek_char(DM) (*((DM)->next))
280 /* Returns the character one past the current position of the mangled
282 #define peek_char_next(DM) \
283 (peek_char (DM) == '\0' ? '\0' : (*((DM)->next + 1)))
285 /* Returns the character at the current position, and advances the
286 current position to the next character. */
287 #define next_char(DM) (*((DM)->next)++)
289 /* Returns non-zero if the current position is the end of the mangled
290 name, i.e. one past the last character. */
291 #define end_of_name_p(DM) (peek_char (DM) == '\0')
293 /* Advances the current position by one character. */
294 #define advance_char(DM) (++(DM)->next)
296 /* Returns the string containing the current demangled result. */
297 #define result_string(DM) (&(DM)->result->string)
299 /* Returns the position at which new text is inserted into the
301 #define result_caret_pos(DM) \
302 (result_length (DM) + \
303 ((string_list_t) result_string (DM))->caret_position)
305 /* Adds a dyn_string_t to the demangled result. */
306 #define result_add_string(DM, STRING) \
307 (dyn_string_insert (&(DM)->result->string, \
308 result_caret_pos (DM), (STRING)) \
309 ? STATUS_OK : STATUS_ALLOCATION_FAILED)
311 /* Adds NUL-terminated string CSTR to the demangled result. */
312 #define result_add(DM, CSTR) \
313 (dyn_string_insert_cstr (&(DM)->result->string, \
314 result_caret_pos (DM), (CSTR)) \
315 ? STATUS_OK : STATUS_ALLOCATION_FAILED)
317 /* Adds character CHAR to the demangled result. */
318 #define result_add_char(DM, CHAR) \
319 (dyn_string_insert_char (&(DM)->result->string, \
320 result_caret_pos (DM), (CHAR)) \
321 ? STATUS_OK : STATUS_ALLOCATION_FAILED)
323 /* Inserts a dyn_string_t to the demangled result at position POS. */
324 #define result_insert_string(DM, POS, STRING) \
325 (dyn_string_insert (&(DM)->result->string, (POS), (STRING)) \
326 ? STATUS_OK : STATUS_ALLOCATION_FAILED)
328 /* Inserts NUL-terminated string CSTR to the demangled result at
330 #define result_insert(DM, POS, CSTR) \
331 (dyn_string_insert_cstr (&(DM)->result->string, (POS), (CSTR)) \
332 ? STATUS_OK : STATUS_ALLOCATION_FAILED)
334 /* Inserts character CHAR to the demangled result at position POS. */
335 #define result_insert_char(DM, POS, CHAR) \
336 (dyn_string_insert_char (&(DM)->result->string, (POS), (CHAR)) \
337 ? STATUS_OK : STATUS_ALLOCATION_FAILED)
339 /* The length of the current demangled result. */
340 #define result_length(DM) \
341 dyn_string_length (&(DM)->result->string)
343 /* Appends a (less-than, greater-than) character to the result in DM
344 to (open, close) a template argument or parameter list. Appends a
345 space first if necessary to prevent spurious elision of angle
346 brackets with the previous character. */
347 #define result_open_template_list(DM) result_add_separated_char(DM, '<')
348 #define result_close_template_list(DM) result_add_separated_char(DM, '>')
350 /* Appends a base 10 representation of VALUE to DS. STATUS_OK on
351 success. On failure, deletes DS and returns an error code. */
354 int_to_dyn_string (value, ds)
361 /* Handle zero up front. */
364 if (!dyn_string_append_char (ds, '0'))
365 return STATUS_ALLOCATION_FAILED;
369 /* For negative numbers, emit a minus sign. */
372 if (!dyn_string_append_char (ds, '-'))
373 return STATUS_ALLOCATION_FAILED;
377 /* Find the power of 10 of the first digit. */
385 /* Write the digits. */
388 int digit = value / mask;
390 if (!dyn_string_append_char (ds, '0' + digit))
391 return STATUS_ALLOCATION_FAILED;
393 value -= digit * mask;
400 /* Creates a new string list node. The contents of the string are
401 empty, but the initial buffer allocation is LENGTH. The string
402 list node should be deleted with string_list_delete. Returns NULL
403 if allocation fails. */
406 string_list_new (length)
409 string_list_t s = (string_list_t) malloc (sizeof (struct string_list_def));
410 s->caret_position = 0;
413 if (!dyn_string_init ((dyn_string_t) s, length))
418 /* Deletes the entire string list starting at NODE. */
421 string_list_delete (node)
426 string_list_t next = node->next;
427 dyn_string_delete ((dyn_string_t) node);
432 /* Appends CHARACTER to the demangled result. If the current trailing
433 character of the result is CHARACTER, a space is inserted first. */
436 result_add_separated_char (dm, character)
440 char *result = dyn_string_buf (result_string (dm));
441 int caret_pos = result_caret_pos (dm);
443 /* Add a space if the last character is already the character we
445 if (caret_pos > 0 && result[caret_pos - 1] == character)
446 RETURN_IF_ERROR (result_add_char (dm, ' '));
447 /* Add the character. */
448 RETURN_IF_ERROR (result_add_char (dm, character));
453 /* Allocates and pushes a new string onto the demangled results stack
454 for DM. Subsequent demangling with DM will emit to the new string.
455 Returns STATUS_OK on success, STATUS_ALLOCATION_FAILED on
456 allocation failure. */
462 string_list_t new_string = string_list_new (0);
463 if (new_string == NULL)
464 /* Allocation failed. */
465 return STATUS_ALLOCATION_FAILED;
467 /* Link the new string to the front of the list of result strings. */
468 new_string->next = (string_list_t) dm->result;
469 dm->result = new_string;
473 /* Removes and returns the topmost element on the demangled results
474 stack for DM. The caller assumes ownership for the returned
481 string_list_t top = dm->result;
482 dm->result = top->next;
486 /* Returns the current value of the caret for the result string. The
487 value is an offet from the end of the result string. */
490 result_get_caret (dm)
493 return ((string_list_t) result_string (dm))->caret_position;
496 /* Sets the value of the caret for the result string, counted as an
497 offet from the end of the result string. */
500 result_set_caret (dm, position)
504 ((string_list_t) result_string (dm))->caret_position = position;
507 /* Shifts the position of the next addition to the result by
508 POSITION_OFFSET. A negative value shifts the caret to the left. */
511 result_shift_caret (dm, position_offset)
515 ((string_list_t) result_string (dm))->caret_position += position_offset;
518 /* Returns non-zero if the character that comes right before the place
519 where text will be added to the result is a space. In this case,
520 the caller should supress adding another space. */
523 result_previous_char_is_space (dm)
526 char *result = dyn_string_buf (result_string (dm));
527 int pos = result_caret_pos (dm);
528 return pos > 0 && result[pos - 1] == ' ';
531 /* Returns the start position of a fragment of the demangled result
532 that will be a substitution candidate. Should be called at the
533 start of productions that can add substitutions. */
536 substitution_start (dm)
539 return result_caret_pos (dm);
542 /* Adds the suffix of the current demangled result of DM starting at
543 START_POSITION as a potential substitution. If TEMPLATE_P is
544 non-zero, this potential substitution is a template-id. */
547 substitution_add (dm, start_position, template_p)
552 dyn_string_t result = result_string (dm);
553 dyn_string_t substitution = dyn_string_new (0);
556 if (substitution == NULL)
557 return STATUS_ALLOCATION_FAILED;
559 /* Extract the substring of the current demangling result that
560 represents the subsitution candidate. */
561 if (!dyn_string_substring (substitution,
562 result, start_position, result_caret_pos (dm)))
564 dyn_string_delete (substitution);
565 return STATUS_ALLOCATION_FAILED;
568 /* If there's no room for the new entry, grow the array. */
569 if (dm->substitutions_allocated == dm->num_substitutions)
571 size_t new_array_size;
572 if (dm->substitutions_allocated > 0)
573 dm->substitutions_allocated *= 2;
575 dm->substitutions_allocated = 2;
577 sizeof (struct substitution_def) * dm->substitutions_allocated;
579 dm->substitutions = (struct substitution_def *)
580 realloc (dm->substitutions, new_array_size);
581 if (dm->substitutions == NULL)
582 /* Realloc failed. */
584 dyn_string_delete (substitution);
585 return STATUS_ALLOCATION_FAILED;
589 /* Add the substitution to the array. */
590 i = dm->num_substitutions++;
591 dm->substitutions[i].text = substitution;
592 dm->substitutions[i].template_p = template_p;
594 #ifdef CP_DEMANGLE_DEBUG
595 substitutions_print (dm, stderr);
601 /* Returns the Nth-most-recent substitution. Sets *TEMPLATE_P to
602 non-zero if the substitution is a template-id, zero otherwise.
603 N is numbered from zero. DM retains ownership of the returned
604 string. If N is negative, or equal to or greater than the current
605 number of substitution candidates, returns NULL. */
608 substitution_get (dm, n, template_p)
613 struct substitution_def *sub;
615 /* Make sure N is in the valid range. */
616 if (n < 0 || n >= dm->num_substitutions)
619 sub = &(dm->substitutions[n]);
620 *template_p = sub->template_p;
624 #ifdef CP_DEMANGLE_DEBUG
625 /* Debugging routine to print the current substitutions to FP. */
628 substitutions_print (dm, fp)
633 int num = dm->num_substitutions;
635 fprintf (fp, "SUBSTITUTIONS:\n");
636 for (seq_id = -1; seq_id < num - 1; ++seq_id)
639 dyn_string_t text = substitution_get (dm, seq_id + 1, &template_p);
642 fprintf (fp, " S_ ");
644 fprintf (fp, " S%d_", seq_id);
645 fprintf (fp, " %c: %s\n", template_p ? '*' : ' ', dyn_string_buf (text));
649 #endif /* CP_DEMANGLE_DEBUG */
651 /* Creates a new template argument list. Returns NULL if allocation
654 static template_arg_list_t
655 template_arg_list_new ()
657 template_arg_list_t new_list =
658 (template_arg_list_t) malloc (sizeof (struct template_arg_list_def));
659 if (new_list == NULL)
661 /* Initialize the new list to have no arguments. */
662 new_list->first_argument = NULL;
663 new_list->last_argument = NULL;
664 /* Return the new list. */
668 /* Deletes a template argument list and the template arguments it
672 template_arg_list_delete (list)
673 template_arg_list_t list;
675 /* If there are any arguments on LIST, delete them. */
676 if (list->first_argument != NULL)
677 string_list_delete (list->first_argument);
682 /* Adds ARG to the template argument list ARG_LIST. */
685 template_arg_list_add_arg (arg_list, arg)
686 template_arg_list_t arg_list;
689 if (arg_list->first_argument == NULL)
690 /* If there were no arguments before, ARG is the first one. */
691 arg_list->first_argument = arg;
693 /* Make ARG the last argument on the list. */
694 arg_list->last_argument->next = arg;
695 /* Make ARG the last on the list. */
696 arg_list->last_argument = arg;
700 /* Returns the template arugment at position INDEX in template
701 argument list ARG_LIST. */
704 template_arg_list_get_arg (arg_list, index)
705 template_arg_list_t arg_list;
708 string_list_t arg = arg_list->first_argument;
709 /* Scan down the list of arguments to find the one at position
715 /* Ran out of arguments before INDEX hit zero. That's an
719 /* Return the argument at position INDEX. */
723 /* Pushes ARG_LIST onto the top of the template argument list stack. */
726 push_template_arg_list (dm, arg_list)
728 template_arg_list_t arg_list;
730 arg_list->next = dm->template_arg_lists;
731 dm->template_arg_lists = arg_list;
732 #ifdef CP_DEMANGLE_DEBUG
733 fprintf (stderr, " ** pushing template arg list\n");
734 template_arg_list_print (arg_list, stderr);
738 /* Pops and deletes elements on the template argument list stack until
739 arg_list is the topmost element. If arg_list is NULL, all elements
740 are popped and deleted. */
743 pop_to_template_arg_list (dm, arg_list)
745 template_arg_list_t arg_list;
747 while (dm->template_arg_lists != arg_list)
749 template_arg_list_t top = dm->template_arg_lists;
750 /* Disconnect the topmost element from the list. */
751 dm->template_arg_lists = top->next;
752 /* Delete the popped element. */
753 template_arg_list_delete (top);
754 #ifdef CP_DEMANGLE_DEBUG
755 fprintf (stderr, " ** removing template arg list\n");
760 #ifdef CP_DEMANGLE_DEBUG
762 /* Prints the contents of ARG_LIST to FP. */
765 template_arg_list_print (arg_list, fp)
766 template_arg_list_t arg_list;
772 fprintf (fp, "TEMPLATE ARGUMENT LIST:\n");
773 for (arg = arg_list->first_argument; arg != NULL; arg = arg->next)
776 fprintf (fp, " T_ : ");
778 fprintf (fp, " T%d_ : ", index);
780 fprintf (fp, "%s\n", dyn_string_buf ((dyn_string_t) arg));
784 #endif /* CP_DEMANGLE_DEBUG */
786 /* Returns the topmost element on the stack of template argument
787 lists. If there is no list of template arguments, returns NULL. */
789 static template_arg_list_t
790 current_template_arg_list (dm)
793 return dm->template_arg_lists;
796 /* Allocates a demangling_t object for demangling mangled NAME. A new
797 result must be pushed before the returned object can be used.
798 Returns NULL if allocation fails. */
801 demangling_new (name, style)
806 dm = (demangling_t) malloc (sizeof (struct demangling_def));
813 dm->num_substitutions = 0;
814 dm->substitutions_allocated = 10;
815 dm->template_arg_lists = NULL;
816 dm->last_source_name = dyn_string_new (0);
817 if (dm->last_source_name == NULL)
819 dm->substitutions = (struct substitution_def *)
820 malloc (dm->substitutions_allocated * sizeof (struct substitution_def));
821 if (dm->substitutions == NULL)
823 dyn_string_delete (dm->last_source_name);
827 dm->is_constructor = 0;
828 dm->is_destructor = 0;
833 /* Deallocates a demangling_t object and all memory associated with
837 demangling_delete (dm)
841 template_arg_list_t arg_list = dm->template_arg_lists;
843 /* Delete the stack of template argument lists. */
844 while (arg_list != NULL)
846 template_arg_list_t next = arg_list->next;
847 template_arg_list_delete (arg_list);
850 /* Delete the list of substitutions. */
851 for (i = dm->num_substitutions; --i >= 0; )
852 dyn_string_delete (dm->substitutions[i].text);
853 free (dm->substitutions);
854 /* Delete the demangled result. */
855 string_list_delete (dm->result);
856 /* Delete the stored identifier name. */
857 dyn_string_delete (dm->last_source_name);
858 /* Delete the context object itself. */
862 /* These functions demangle an alternative of the corresponding
863 production in the mangling spec. The first argument of each is a
864 demangling context structure for the current demangling
865 operation. Most emit demangled text directly to the topmost result
866 string on the result string stack in the demangling context
869 static status_t demangle_char
870 PARAMS ((demangling_t, int));
871 static status_t demangle_mangled_name
872 PARAMS ((demangling_t));
873 static status_t demangle_encoding
874 PARAMS ((demangling_t));
875 static status_t demangle_name
876 PARAMS ((demangling_t, int *));
877 static status_t demangle_nested_name
878 PARAMS ((demangling_t, int *));
879 static status_t demangle_prefix
880 PARAMS ((demangling_t, int *));
881 static status_t demangle_unqualified_name
882 PARAMS ((demangling_t, int *));
883 static status_t demangle_source_name
884 PARAMS ((demangling_t));
885 static status_t demangle_number
886 PARAMS ((demangling_t, int *, int, int));
887 static status_t demangle_number_literally
888 PARAMS ((demangling_t, dyn_string_t, int, int));
889 static status_t demangle_identifier
890 PARAMS ((demangling_t, int, dyn_string_t));
891 static status_t demangle_operator_name
892 PARAMS ((demangling_t, int, int *));
893 static status_t demangle_nv_offset
894 PARAMS ((demangling_t));
895 static status_t demangle_v_offset
896 PARAMS ((demangling_t));
897 static status_t demangle_call_offset
898 PARAMS ((demangling_t));
899 static status_t demangle_special_name
900 PARAMS ((demangling_t));
901 static status_t demangle_ctor_dtor_name
902 PARAMS ((demangling_t));
903 static status_t demangle_type_ptr
904 PARAMS ((demangling_t, int *, int));
905 static status_t demangle_type
906 PARAMS ((demangling_t));
907 static status_t demangle_CV_qualifiers
908 PARAMS ((demangling_t, dyn_string_t));
909 static status_t demangle_builtin_type
910 PARAMS ((demangling_t));
911 static status_t demangle_function_type
912 PARAMS ((demangling_t, int *));
913 static status_t demangle_bare_function_type
914 PARAMS ((demangling_t, int *));
915 static status_t demangle_class_enum_type
916 PARAMS ((demangling_t, int *));
917 static status_t demangle_array_type
918 PARAMS ((demangling_t, int *));
919 static status_t demangle_template_param
920 PARAMS ((demangling_t));
921 static status_t demangle_template_args
922 PARAMS ((demangling_t));
923 static status_t demangle_literal
924 PARAMS ((demangling_t));
925 static status_t demangle_template_arg
926 PARAMS ((demangling_t));
927 static status_t demangle_expression
928 PARAMS ((demangling_t));
929 static status_t demangle_scope_expression
930 PARAMS ((demangling_t));
931 static status_t demangle_expr_primary
932 PARAMS ((demangling_t));
933 static status_t demangle_substitution
934 PARAMS ((demangling_t, int *));
935 static status_t demangle_local_name
936 PARAMS ((demangling_t));
937 static status_t demangle_discriminator
938 PARAMS ((demangling_t, int));
939 static status_t cp_demangle
940 PARAMS ((const char *, dyn_string_t, int));
942 static status_t cp_demangle_type
943 PARAMS ((const char*, dyn_string_t));
946 /* When passed to demangle_bare_function_type, indicates that the
947 function's return type is not encoded before its parameter types. */
948 #define BFT_NO_RETURN_TYPE NULL
950 /* Check that the next character is C. If so, consume it. If not,
954 demangle_char (dm, c)
958 static char *error_message = NULL;
960 if (peek_char (dm) == c)
967 if (error_message == NULL)
968 error_message = strdup ("Expected ?");
969 error_message[9] = c;
970 return error_message;
974 /* Demangles and emits a <mangled-name>.
976 <mangled-name> ::= _Z <encoding> */
979 demangle_mangled_name (dm)
982 DEMANGLE_TRACE ("mangled-name", dm);
983 RETURN_IF_ERROR (demangle_char (dm, '_'));
984 RETURN_IF_ERROR (demangle_char (dm, 'Z'));
985 RETURN_IF_ERROR (demangle_encoding (dm));
989 /* Demangles and emits an <encoding>.
991 <encoding> ::= <function name> <bare-function-type>
993 ::= <special-name> */
996 demangle_encoding (dm)
999 int encode_return_type;
1001 template_arg_list_t old_arg_list = current_template_arg_list (dm);
1002 char peek = peek_char (dm);
1004 DEMANGLE_TRACE ("encoding", dm);
1006 /* Remember where the name starts. If it turns out to be a template
1007 function, we'll have to insert the return type here. */
1008 start_position = result_caret_pos (dm);
1010 if (peek == 'G' || peek == 'T')
1011 RETURN_IF_ERROR (demangle_special_name (dm));
1014 /* Now demangle the name. */
1015 RETURN_IF_ERROR (demangle_name (dm, &encode_return_type));
1017 /* If there's anything left, the name was a function name, with
1018 maybe its return type, and its parameter types, following. */
1019 if (!end_of_name_p (dm)
1020 && peek_char (dm) != 'E')
1022 if (encode_return_type)
1023 /* Template functions have their return type encoded. The
1024 return type should be inserted at start_position. */
1026 (demangle_bare_function_type (dm, &start_position));
1028 /* Non-template functions don't have their return type
1031 (demangle_bare_function_type (dm, BFT_NO_RETURN_TYPE));
1035 /* Pop off template argument lists that were built during the
1036 mangling of this name, to restore the old template context. */
1037 pop_to_template_arg_list (dm, old_arg_list);
1042 /* Demangles and emits a <name>.
1044 <name> ::= <unscoped-name>
1045 ::= <unscoped-template-name> <template-args>
1049 <unscoped-name> ::= <unqualified-name>
1050 ::= St <unqualified-name> # ::std::
1052 <unscoped-template-name>
1054 ::= <substitution> */
1057 demangle_name (dm, encode_return_type)
1059 int *encode_return_type;
1061 int start = substitution_start (dm);
1062 char peek = peek_char (dm);
1063 int is_std_substitution = 0;
1065 /* Generally, the return type is encoded if the function is a
1066 template-id, and suppressed otherwise. There are a few cases,
1067 though, in which the return type is not encoded even for a
1068 templated function. In these cases, this flag is set. */
1069 int suppress_return_type = 0;
1071 DEMANGLE_TRACE ("name", dm);
1076 /* This is a <nested-name>. */
1077 RETURN_IF_ERROR (demangle_nested_name (dm, encode_return_type));
1081 RETURN_IF_ERROR (demangle_local_name (dm));
1082 *encode_return_type = 0;
1086 /* The `St' substitution allows a name nested in std:: to appear
1087 without being enclosed in a nested name. */
1088 if (peek_char_next (dm) == 't')
1090 (void) next_char (dm);
1091 (void) next_char (dm);
1092 RETURN_IF_ERROR (result_add (dm, "std::"));
1094 (demangle_unqualified_name (dm, &suppress_return_type));
1095 is_std_substitution = 1;
1098 RETURN_IF_ERROR (demangle_substitution (dm, encode_return_type));
1099 /* Check if a template argument list immediately follows.
1100 If so, then we just demangled an <unqualified-template-name>. */
1101 if (peek_char (dm) == 'I')
1103 /* A template name of the form std::<unqualified-name> is a
1104 substitution candidate. */
1105 if (is_std_substitution)
1106 RETURN_IF_ERROR (substitution_add (dm, start, 0));
1107 /* Demangle the <template-args> here. */
1108 RETURN_IF_ERROR (demangle_template_args (dm));
1109 *encode_return_type = !suppress_return_type;
1112 *encode_return_type = 0;
1117 /* This is an <unscoped-name> or <unscoped-template-name>. */
1118 RETURN_IF_ERROR (demangle_unqualified_name (dm, &suppress_return_type));
1120 /* If the <unqualified-name> is followed by template args, this
1121 is an <unscoped-template-name>. */
1122 if (peek_char (dm) == 'I')
1124 /* Add a substitution for the unqualified template name. */
1125 RETURN_IF_ERROR (substitution_add (dm, start, 0));
1127 RETURN_IF_ERROR (demangle_template_args (dm));
1128 *encode_return_type = !suppress_return_type;
1131 *encode_return_type = 0;
1139 /* Demangles and emits a <nested-name>.
1141 <nested-name> ::= N [<CV-qualifiers>] <prefix> <unqulified-name> E */
1144 demangle_nested_name (dm, encode_return_type)
1146 int *encode_return_type;
1150 DEMANGLE_TRACE ("nested-name", dm);
1152 RETURN_IF_ERROR (demangle_char (dm, 'N'));
1154 peek = peek_char (dm);
1155 if (peek == 'r' || peek == 'V' || peek == 'K')
1157 dyn_string_t cv_qualifiers;
1160 /* Snarf up CV qualifiers. */
1161 cv_qualifiers = dyn_string_new (24);
1162 if (cv_qualifiers == NULL)
1163 return STATUS_ALLOCATION_FAILED;
1164 demangle_CV_qualifiers (dm, cv_qualifiers);
1166 /* Emit them, preceded by a space. */
1167 status = result_add_char (dm, ' ');
1168 if (STATUS_NO_ERROR (status))
1169 status = result_add_string (dm, cv_qualifiers);
1170 /* The CV qualifiers that occur in a <nested-name> will be
1171 qualifiers for member functions. These are placed at the end
1172 of the function. Therefore, shift the caret to the left by
1173 the length of the qualifiers, so other text is inserted
1174 before them and they stay at the end. */
1175 result_shift_caret (dm, -dyn_string_length (cv_qualifiers) - 1);
1177 dyn_string_delete (cv_qualifiers);
1178 RETURN_IF_ERROR (status);
1181 RETURN_IF_ERROR (demangle_prefix (dm, encode_return_type));
1182 /* No need to demangle the final <unqualified-name>; demangle_prefix
1184 RETURN_IF_ERROR (demangle_char (dm, 'E'));
1189 /* Demangles and emits a <prefix>.
1191 <prefix> ::= <prefix> <unqualified-name>
1192 ::= <template-prefix> <template-args>
1196 <template-prefix> ::= <prefix>
1197 ::= <substitution> */
1200 demangle_prefix (dm, encode_return_type)
1202 int *encode_return_type;
1204 int start = substitution_start (dm);
1207 /* ENCODE_RETURN_TYPE is updated as we decend the nesting chain.
1208 After <template-args>, it is set to non-zero; after everything
1209 else it is set to zero. */
1211 /* Generally, the return type is encoded if the function is a
1212 template-id, and suppressed otherwise. There are a few cases,
1213 though, in which the return type is not encoded even for a
1214 templated function. In these cases, this flag is set. */
1215 int suppress_return_type = 0;
1217 DEMANGLE_TRACE ("prefix", dm);
1223 if (end_of_name_p (dm))
1224 return "Unexpected end of name in <compound-name>.";
1226 peek = peek_char (dm);
1228 /* We'll initialize suppress_return_type to false, and set it to true
1229 if we end up demangling a constructor name. However, make
1230 sure we're not actually about to demangle template arguments
1231 -- if so, this is the <template-args> following a
1232 <template-prefix>, so we'll want the previous flag value
1235 suppress_return_type = 0;
1237 if (IS_DIGIT ((unsigned char) peek)
1238 || (peek >= 'a' && peek <= 'z')
1239 || peek == 'C' || peek == 'D'
1242 /* We have another level of scope qualification. */
1244 RETURN_IF_ERROR (result_add (dm, NAMESPACE_SEPARATOR));
1249 /* The substitution determines whether this is a
1251 RETURN_IF_ERROR (demangle_substitution (dm, encode_return_type));
1254 /* It's just a name. */
1256 (demangle_unqualified_name (dm, &suppress_return_type));
1257 *encode_return_type = 0;
1260 else if (peek == 'Z')
1261 RETURN_IF_ERROR (demangle_local_name (dm));
1262 else if (peek == 'I')
1264 RETURN_IF_ERROR (demangle_template_args (dm));
1266 /* Now we want to indicate to the caller that we've
1267 demangled template arguments, thus the prefix was a
1268 <template-prefix>. That's so that the caller knows to
1269 demangle the function's return type, if this turns out to
1270 be a function name. But, if it's a member template
1271 constructor or a templated conversion operator, report it
1272 as untemplated. Those never get encoded return types. */
1273 *encode_return_type = !suppress_return_type;
1275 else if (peek == 'E')
1279 return "Unexpected character in <compound-name>.";
1282 && peek_char (dm) != 'E')
1283 /* Add a new substitution for the prefix thus far. */
1284 RETURN_IF_ERROR (substitution_add (dm, start, *encode_return_type));
1288 /* Demangles and emits an <unqualified-name>. If this
1289 <unqualified-name> is for a special function type that should never
1290 have its return type encoded (particularly, a constructor or
1291 conversion operator), *SUPPRESS_RETURN_TYPE is set to 1; otherwise,
1294 <unqualified-name> ::= <operator-name>
1296 ::= <source-name> */
1299 demangle_unqualified_name (dm, suppress_return_type)
1301 int *suppress_return_type;
1303 char peek = peek_char (dm);
1305 DEMANGLE_TRACE ("unqualified-name", dm);
1307 /* By default, don't force suppression of the return type (though
1308 non-template functions still don't get a return type encoded). */
1309 *suppress_return_type = 0;
1311 if (IS_DIGIT ((unsigned char) peek))
1312 RETURN_IF_ERROR (demangle_source_name (dm));
1313 else if (peek >= 'a' && peek <= 'z')
1317 /* Conversion operators never have a return type encoded. */
1318 if (peek == 'c' && peek_char_next (dm) == 'v')
1319 *suppress_return_type = 1;
1321 RETURN_IF_ERROR (demangle_operator_name (dm, 0, &num_args));
1323 else if (peek == 'C' || peek == 'D')
1325 /* Constructors never have a return type encoded. */
1327 *suppress_return_type = 1;
1329 RETURN_IF_ERROR (demangle_ctor_dtor_name (dm));
1332 return "Unexpected character in <unqualified-name>.";
1337 /* Demangles and emits <source-name>.
1339 <source-name> ::= <length number> <identifier> */
1342 demangle_source_name (dm)
1347 DEMANGLE_TRACE ("source-name", dm);
1349 /* Decode the length of the identifier. */
1350 RETURN_IF_ERROR (demangle_number (dm, &length, 10, 0));
1352 return "Zero length in <source-name>.";
1354 /* Now the identifier itself. It's placed into last_source_name,
1355 where it can be used to build a constructor or destructor name. */
1356 RETURN_IF_ERROR (demangle_identifier (dm, length,
1357 dm->last_source_name));
1360 RETURN_IF_ERROR (result_add_string (dm, dm->last_source_name));
1365 /* Demangles a number, either a <number> or a <positive-number> at the
1366 current position, consuming all consecutive digit characters. Sets
1367 *VALUE to the resulting numberand returns STATUS_OK. The number is
1368 interpreted as BASE, which must be either 10 or 36. If IS_SIGNED
1369 is non-zero, negative numbers -- prefixed with `n' -- are accepted.
1371 <number> ::= [n] <positive-number>
1373 <positive-number> ::= <decimal integer> */
1376 demangle_number (dm, value, base, is_signed)
1382 dyn_string_t number = dyn_string_new (10);
1384 DEMANGLE_TRACE ("number", dm);
1387 return STATUS_ALLOCATION_FAILED;
1389 demangle_number_literally (dm, number, base, is_signed);
1390 *value = strtol (dyn_string_buf (number), NULL, base);
1391 dyn_string_delete (number);
1396 /* Demangles a number at the current position. The digits (and minus
1397 sign, if present) that make up the number are appended to STR.
1398 Only base-BASE digits are accepted; BASE must be either 10 or 36.
1399 If IS_SIGNED, negative numbers -- prefixed with `n' -- are
1400 accepted. Does not consume a trailing underscore or other
1401 terminating character. */
1404 demangle_number_literally (dm, str, base, is_signed)
1410 DEMANGLE_TRACE ("number*", dm);
1412 if (base != 10 && base != 36)
1413 return STATUS_INTERNAL_ERROR;
1415 /* An `n' denotes a negative number. */
1416 if (is_signed && peek_char (dm) == 'n')
1418 /* Skip past the n. */
1420 /* The normal way to write a negative number is with a minus
1422 if (!dyn_string_append_char (str, '-'))
1423 return STATUS_ALLOCATION_FAILED;
1426 /* Loop until we hit a non-digit. */
1429 char peek = peek_char (dm);
1430 if (IS_DIGIT ((unsigned char) peek)
1431 || (base == 36 && peek >= 'A' && peek <= 'Z'))
1433 /* Accumulate digits. */
1434 if (!dyn_string_append_char (str, next_char (dm)))
1435 return STATUS_ALLOCATION_FAILED;
1438 /* Not a digit? All done. */
1445 /* Demangles an identifier at the current position of LENGTH
1446 characters and places it in IDENTIFIER. */
1449 demangle_identifier (dm, length, identifier)
1452 dyn_string_t identifier;
1454 DEMANGLE_TRACE ("identifier", dm);
1456 dyn_string_clear (identifier);
1457 if (!dyn_string_resize (identifier, length))
1458 return STATUS_ALLOCATION_FAILED;
1460 while (length-- > 0)
1462 if (end_of_name_p (dm))
1463 return "Unexpected end of name in <identifier>.";
1464 if (!dyn_string_append_char (identifier, next_char (dm)))
1465 return STATUS_ALLOCATION_FAILED;
1468 /* GCC encodes anonymous namespaces using a `_GLOBAL_[_.$]N.'
1469 followed by the source file name and some random characters.
1470 Unless we're in strict mode, decipher these names appropriately. */
1473 char *name = dyn_string_buf (identifier);
1474 int prefix_length = strlen (ANONYMOUS_NAMESPACE_PREFIX);
1476 /* Compare the first, fixed part. */
1477 if (strncmp (name, ANONYMOUS_NAMESPACE_PREFIX, prefix_length) == 0)
1479 name += prefix_length;
1480 /* The next character might be a period, an underscore, or
1481 dollar sign, depending on the target architecture's
1482 assembler's capabilities. After that comes an `N'. */
1483 if ((*name == '.' || *name == '_' || *name == '$')
1484 && *(name + 1) == 'N')
1485 /* This looks like the anonymous namespace identifier.
1486 Replace it with something comprehensible. */
1487 dyn_string_copy_cstr (identifier, "(anonymous namespace)");
1494 /* Demangles and emits an <operator-name>. If SHORT_NAME is non-zero,
1495 the short form is emitted; otherwise the full source form
1496 (`operator +' etc.) is emitted. *NUM_ARGS is set to the number of
1497 operands that the operator takes.
1548 ::= cv <type> # cast
1549 ::= v [0-9] <source-name> # vendor extended operator */
1552 demangle_operator_name (dm, short_name, num_args)
1557 struct operator_code
1559 /* The mangled code for this operator. */
1561 /* The source name of this operator. */
1563 /* The number of arguments this operator takes. */
1567 static const struct operator_code operators[] =
1578 { "da", " delete[]", 1 },
1580 { "dl", " delete" , 1 },
1588 { "lS", "<<=" , 2 },
1597 { "na", " new[]" , 1 },
1601 { "nw", " new" , 1 },
1607 { "pm", "->*" , 2 },
1613 { "rS", ">>=" , 2 },
1616 { "sz", " sizeof" , 1 }
1619 const int num_operators =
1620 sizeof (operators) / sizeof (struct operator_code);
1622 int c0 = next_char (dm);
1623 int c1 = next_char (dm);
1624 const struct operator_code* p1 = operators;
1625 const struct operator_code* p2 = operators + num_operators;
1627 DEMANGLE_TRACE ("operator-name", dm);
1629 /* Is this a vendor-extended operator? */
1630 if (c0 == 'v' && IS_DIGIT (c1))
1632 RETURN_IF_ERROR (result_add (dm, "operator "));
1633 RETURN_IF_ERROR (demangle_source_name (dm));
1638 /* Is this a conversion operator? */
1639 if (c0 == 'c' && c1 == 'v')
1641 RETURN_IF_ERROR (result_add (dm, "operator "));
1642 /* Demangle the converted-to type. */
1643 RETURN_IF_ERROR (demangle_type (dm));
1648 /* Perform a binary search for the operator code. */
1651 const struct operator_code* p = p1 + (p2 - p1) / 2;
1652 char match0 = p->code[0];
1653 char match1 = p->code[1];
1655 if (c0 == match0 && c1 == match1)
1659 RETURN_IF_ERROR (result_add (dm, "operator"));
1660 RETURN_IF_ERROR (result_add (dm, p->name));
1661 *num_args = p->num_args;
1667 /* Couldn't find it. */
1668 return "Unknown code in <operator-name>.";
1671 if (c0 < match0 || (c0 == match0 && c1 < match1))
1678 /* Demangles and omits an <nv-offset>.
1680 <nv-offset> ::= <offset number> # non-virtual base override */
1683 demangle_nv_offset (dm)
1686 dyn_string_t number;
1687 status_t status = STATUS_OK;
1689 DEMANGLE_TRACE ("h-offset", dm);
1691 /* Demangle the offset. */
1692 number = dyn_string_new (4);
1694 return STATUS_ALLOCATION_FAILED;
1695 demangle_number_literally (dm, number, 10, 1);
1697 /* Don't display the offset unless in verbose mode. */
1700 status = result_add (dm, " [nv:");
1701 if (STATUS_NO_ERROR (status))
1702 status = result_add_string (dm, number);
1703 if (STATUS_NO_ERROR (status))
1704 status = result_add_char (dm, ']');
1708 dyn_string_delete (number);
1709 RETURN_IF_ERROR (status);
1713 /* Demangles and emits a <v-offset>.
1715 <v-offset> ::= <offset number> _ <virtual offset number>
1716 # virtual base override, with vcall offset */
1719 demangle_v_offset (dm)
1722 dyn_string_t number;
1723 status_t status = STATUS_OK;
1725 DEMANGLE_TRACE ("v-offset", dm);
1727 /* Demangle the offset. */
1728 number = dyn_string_new (4);
1730 return STATUS_ALLOCATION_FAILED;
1731 demangle_number_literally (dm, number, 10, 1);
1733 /* Don't display the offset unless in verbose mode. */
1736 status = result_add (dm, " [v:");
1737 if (STATUS_NO_ERROR (status))
1738 status = result_add_string (dm, number);
1739 if (STATUS_NO_ERROR (status))
1740 result_add_char (dm, ',');
1742 dyn_string_delete (number);
1743 RETURN_IF_ERROR (status);
1745 /* Demangle the separator. */
1746 RETURN_IF_ERROR (demangle_char (dm, '_'));
1748 /* Demangle the vcall offset. */
1749 number = dyn_string_new (4);
1751 return STATUS_ALLOCATION_FAILED;
1752 demangle_number_literally (dm, number, 10, 1);
1754 /* Don't display the vcall offset unless in verbose mode. */
1757 status = result_add_string (dm, number);
1758 if (STATUS_NO_ERROR (status))
1759 status = result_add_char (dm, ']');
1761 dyn_string_delete (number);
1762 RETURN_IF_ERROR (status);
1767 /* Demangles and emits a <call-offset>.
1769 <call-offset> ::= h <nv-offset> _
1770 ::= v <v-offset> _ */
1773 demangle_call_offset (dm)
1776 DEMANGLE_TRACE ("call-offset", dm);
1778 switch (peek_char (dm))
1782 /* Demangle the offset. */
1783 RETURN_IF_ERROR (demangle_nv_offset (dm));
1784 /* Demangle the separator. */
1785 RETURN_IF_ERROR (demangle_char (dm, '_'));
1790 /* Demangle the offset. */
1791 RETURN_IF_ERROR (demangle_v_offset (dm));
1792 /* Demangle the separator. */
1793 RETURN_IF_ERROR (demangle_char (dm, '_'));
1797 return "Unrecognized <call-offset>.";
1803 /* Demangles and emits a <special-name>.
1805 <special-name> ::= GV <object name> # Guard variable
1806 ::= TV <type> # virtual table
1808 ::= TI <type> # typeinfo structure
1809 ::= TS <type> # typeinfo name
1811 Other relevant productions include thunks:
1813 <special-name> ::= T <call-offset> <base encoding>
1814 # base is the nominal target function of thunk
1816 <special-name> ::= Tc <call-offset> <call-offset> <base encoding>
1817 # base is the nominal target function of thunk
1818 # first call-offset is 'this' adjustment
1819 # second call-offset is result adjustment
1823 <call-offset> ::= h <nv-offset> _
1826 Also demangles the special g++ manglings,
1828 <special-name> ::= TC <type> <offset number> _ <base type>
1829 # construction vtable
1830 ::= TF <type> # typeinfo function (old ABI only)
1831 ::= TJ <type> # java Class structure */
1834 demangle_special_name (dm)
1837 dyn_string_t number;
1839 char peek = peek_char (dm);
1841 DEMANGLE_TRACE ("special-name", dm);
1845 /* A guard variable name. Consume the G. */
1847 RETURN_IF_ERROR (demangle_char (dm, 'V'));
1848 RETURN_IF_ERROR (result_add (dm, "guard variable for "));
1849 RETURN_IF_ERROR (demangle_name (dm, &unused));
1851 else if (peek == 'T')
1853 status_t status = STATUS_OK;
1855 /* Other C++ implementation miscellania. Consume the T. */
1858 switch (peek_char (dm))
1861 /* Virtual table. */
1863 RETURN_IF_ERROR (result_add (dm, "vtable for "));
1864 RETURN_IF_ERROR (demangle_type (dm));
1868 /* VTT structure. */
1870 RETURN_IF_ERROR (result_add (dm, "VTT for "));
1871 RETURN_IF_ERROR (demangle_type (dm));
1875 /* Typeinfo structure. */
1877 RETURN_IF_ERROR (result_add (dm, "typeinfo for "));
1878 RETURN_IF_ERROR (demangle_type (dm));
1882 /* Typeinfo function. Used only in old ABI with new mangling. */
1884 RETURN_IF_ERROR (result_add (dm, "typeinfo fn for "));
1885 RETURN_IF_ERROR (demangle_type (dm));
1889 /* Character string containing type name, used in typeinfo. */
1891 RETURN_IF_ERROR (result_add (dm, "typeinfo name for "));
1892 RETURN_IF_ERROR (demangle_type (dm));
1896 /* The java Class variable corresponding to a C++ class. */
1898 RETURN_IF_ERROR (result_add (dm, "java Class for "));
1899 RETURN_IF_ERROR (demangle_type (dm));
1903 /* Non-virtual thunk. */
1905 RETURN_IF_ERROR (result_add (dm, "non-virtual thunk"));
1906 RETURN_IF_ERROR (demangle_nv_offset (dm));
1907 /* Demangle the separator. */
1908 RETURN_IF_ERROR (demangle_char (dm, '_'));
1909 /* Demangle and emit the target name and function type. */
1910 RETURN_IF_ERROR (result_add (dm, " to "));
1911 RETURN_IF_ERROR (demangle_encoding (dm));
1915 /* Virtual thunk. */
1917 RETURN_IF_ERROR (result_add (dm, "virtual thunk"));
1918 RETURN_IF_ERROR (demangle_v_offset (dm));
1919 /* Demangle the separator. */
1920 RETURN_IF_ERROR (demangle_char (dm, '_'));
1921 /* Demangle and emit the target function. */
1922 RETURN_IF_ERROR (result_add (dm, " to "));
1923 RETURN_IF_ERROR (demangle_encoding (dm));
1927 /* Covariant return thunk. */
1929 RETURN_IF_ERROR (result_add (dm, "covariant return thunk"));
1930 RETURN_IF_ERROR (demangle_call_offset (dm));
1931 RETURN_IF_ERROR (demangle_call_offset (dm));
1932 /* Demangle and emit the target function. */
1933 RETURN_IF_ERROR (result_add (dm, " to "));
1934 RETURN_IF_ERROR (demangle_encoding (dm));
1938 /* TC is a special g++ mangling for a construction vtable. */
1941 dyn_string_t derived_type;
1944 RETURN_IF_ERROR (result_add (dm, "construction vtable for "));
1946 /* Demangle the derived type off to the side. */
1947 RETURN_IF_ERROR (result_push (dm));
1948 RETURN_IF_ERROR (demangle_type (dm));
1949 derived_type = (dyn_string_t) result_pop (dm);
1951 /* Demangle the offset. */
1952 number = dyn_string_new (4);
1955 dyn_string_delete (derived_type);
1956 return STATUS_ALLOCATION_FAILED;
1958 demangle_number_literally (dm, number, 10, 1);
1959 /* Demangle the underscore separator. */
1960 status = demangle_char (dm, '_');
1962 /* Demangle the base type. */
1963 if (STATUS_NO_ERROR (status))
1964 status = demangle_type (dm);
1966 /* Emit the derived type. */
1967 if (STATUS_NO_ERROR (status))
1968 status = result_add (dm, "-in-");
1969 if (STATUS_NO_ERROR (status))
1970 status = result_add_string (dm, derived_type);
1971 dyn_string_delete (derived_type);
1973 /* Don't display the offset unless in verbose mode. */
1976 status = result_add_char (dm, ' ');
1977 if (STATUS_NO_ERROR (status))
1978 result_add_string (dm, number);
1980 dyn_string_delete (number);
1981 RETURN_IF_ERROR (status);
1984 /* If flag_strict, fall through. */
1987 return "Unrecognized <special-name>.";
1991 return STATUS_ERROR;
1996 /* Demangles and emits a <ctor-dtor-name>.
1999 ::= C1 # complete object (in-charge) ctor
2000 ::= C2 # base object (not-in-charge) ctor
2001 ::= C3 # complete object (in-charge) allocating ctor
2002 ::= D0 # deleting (in-charge) dtor
2003 ::= D1 # complete object (in-charge) dtor
2004 ::= D2 # base object (not-in-charge) dtor */
2007 demangle_ctor_dtor_name (dm)
2010 static const char *const ctor_flavors[] =
2016 static const char *const dtor_flavors[] =
2018 "in-charge deleting",
2024 char peek = peek_char (dm);
2026 DEMANGLE_TRACE ("ctor-dtor-name", dm);
2030 /* A constructor name. Consume the C. */
2032 flavor = next_char (dm);
2033 if (flavor < '1' || flavor > '3')
2034 return "Unrecognized constructor.";
2035 RETURN_IF_ERROR (result_add_string (dm, dm->last_source_name));
2038 case '1': dm->is_constructor = gnu_v3_complete_object_ctor;
2040 case '2': dm->is_constructor = gnu_v3_base_object_ctor;
2042 case '3': dm->is_constructor = gnu_v3_complete_object_allocating_ctor;
2045 /* Print the flavor of the constructor if in verbose mode. */
2048 RETURN_IF_ERROR (result_add (dm, "["));
2049 RETURN_IF_ERROR (result_add (dm, ctor_flavors[flavor - '1']));
2050 RETURN_IF_ERROR (result_add_char (dm, ']'));
2053 else if (peek == 'D')
2055 /* A destructor name. Consume the D. */
2057 flavor = next_char (dm);
2058 if (flavor < '0' || flavor > '2')
2059 return "Unrecognized destructor.";
2060 RETURN_IF_ERROR (result_add_char (dm, '~'));
2061 RETURN_IF_ERROR (result_add_string (dm, dm->last_source_name));
2064 case '0': dm->is_destructor = gnu_v3_deleting_dtor;
2066 case '1': dm->is_destructor = gnu_v3_complete_object_dtor;
2068 case '2': dm->is_destructor = gnu_v3_base_object_dtor;
2071 /* Print the flavor of the destructor if in verbose mode. */
2074 RETURN_IF_ERROR (result_add (dm, " ["));
2075 RETURN_IF_ERROR (result_add (dm, dtor_flavors[flavor - '0']));
2076 RETURN_IF_ERROR (result_add_char (dm, ']'));
2080 return STATUS_ERROR;
2085 /* Handle pointer, reference, and pointer-to-member cases for
2086 demangle_type. All consecutive `P's, `R's, and 'M's are joined to
2087 build a pointer/reference type. We snarf all these, plus the
2088 following <type>, all at once since we need to know whether we have
2089 a pointer to data or pointer to function to construct the right
2090 output syntax. C++'s pointer syntax is hairy.
2092 This function adds substitution candidates for every nested
2093 pointer/reference type it processes, including the outermost, final
2094 type, assuming the substitution starts at SUBSTITUTION_START in the
2095 demangling result. For example, if this function demangles
2096 `PP3Foo', it will add a substitution for `Foo', `Foo*', and
2097 `Foo**', in that order.
2099 *INSERT_POS is a quantity used internally, when this function calls
2100 itself recursively, to figure out where to insert pointer
2101 punctuation on the way up. On entry to this function, INSERT_POS
2102 should point to a temporary value, but that value need not be
2107 ::= <pointer-to-member-type>
2109 <pointer-to-member-type> ::= M </class/ type> </member/ type> */
2112 demangle_type_ptr (dm, insert_pos, substitution_start)
2115 int substitution_start;
2118 int is_substitution_candidate = 1;
2120 DEMANGLE_TRACE ("type*", dm);
2122 /* Scan forward, collecting pointers and references into symbols,
2123 until we hit something else. Then emit the type. */
2124 switch (peek_char (dm))
2127 /* A pointer. Snarf the `P'. */
2129 /* Demangle the underlying type. */
2130 RETURN_IF_ERROR (demangle_type_ptr (dm, insert_pos,
2131 substitution_start));
2132 /* Insert an asterisk where we're told to; it doesn't
2133 necessarily go at the end. If we're doing Java style output,
2134 there is no pointer symbol. */
2135 if (dm->style != DMGL_JAVA)
2136 RETURN_IF_ERROR (result_insert_char (dm, *insert_pos, '*'));
2137 /* The next (outermost) pointer or reference character should go
2143 /* A reference. Snarf the `R'. */
2145 /* Demangle the underlying type. */
2146 RETURN_IF_ERROR (demangle_type_ptr (dm, insert_pos,
2147 substitution_start));
2148 /* Insert an ampersand where we're told to; it doesn't
2149 necessarily go at the end. */
2150 RETURN_IF_ERROR (result_insert_char (dm, *insert_pos, '&'));
2151 /* The next (outermost) pointer or reference character should go
2158 /* A pointer-to-member. */
2159 dyn_string_t class_type;
2164 /* Capture the type of which this is a pointer-to-member. */
2165 RETURN_IF_ERROR (result_push (dm));
2166 RETURN_IF_ERROR (demangle_type (dm));
2167 class_type = (dyn_string_t) result_pop (dm);
2169 if (peek_char (dm) == 'F')
2170 /* A pointer-to-member function. We want output along the
2171 lines of `void (C::*) (int, int)'. Demangle the function
2172 type, which would in this case give `void () (int, int)'
2173 and set *insert_pos to the spot between the first
2175 status = demangle_type_ptr (dm, insert_pos, substitution_start);
2176 else if (peek_char (dm) == 'A')
2177 /* A pointer-to-member array variable. We want output that
2178 looks like `int (Klass::*) [10]'. Demangle the array type
2179 as `int () [10]', and set *insert_pos to the spot between
2181 status = demangle_array_type (dm, insert_pos);
2184 /* A pointer-to-member variable. Demangle the type of the
2185 pointed-to member. */
2186 status = demangle_type (dm);
2187 /* Make it pretty. */
2188 if (STATUS_NO_ERROR (status)
2189 && !result_previous_char_is_space (dm))
2190 status = result_add_char (dm, ' ');
2191 /* The pointer-to-member notation (e.g. `C::*') follows the
2193 *insert_pos = result_caret_pos (dm);
2196 /* Build the pointer-to-member notation. */
2197 if (STATUS_NO_ERROR (status))
2198 status = result_insert (dm, *insert_pos, "::*");
2199 if (STATUS_NO_ERROR (status))
2200 status = result_insert_string (dm, *insert_pos, class_type);
2201 /* There may be additional levels of (pointer or reference)
2202 indirection in this type. If so, the `*' and `&' should be
2203 added after the pointer-to-member notation (e.g. `C::*&' for
2204 a reference to a pointer-to-member of class C). */
2205 *insert_pos += dyn_string_length (class_type) + 3;
2208 dyn_string_delete (class_type);
2210 RETURN_IF_ERROR (status);
2215 /* Ooh, tricky, a pointer-to-function. When we demangle the
2216 function type, the return type should go at the very
2218 *insert_pos = result_caret_pos (dm);
2219 /* The parentheses indicate this is a function pointer or
2221 RETURN_IF_ERROR (result_add (dm, "()"));
2222 /* Now demangle the function type. The return type will be
2223 inserted before the `()', and the argument list will go after
2225 RETURN_IF_ERROR (demangle_function_type (dm, insert_pos));
2226 /* We should now have something along the lines of
2227 `void () (int, int)'. The pointer or reference characters
2228 have to inside the first set of parentheses. *insert_pos has
2229 already been updated to point past the end of the return
2230 type. Move it one character over so it points inside the
2236 /* An array pointer or reference. demangle_array_type will figure
2237 out where the asterisks and ampersands go. */
2238 RETURN_IF_ERROR (demangle_array_type (dm, insert_pos));
2242 /* No more pointer or reference tokens; this is therefore a
2243 pointer to data. Finish up by demangling the underlying
2245 RETURN_IF_ERROR (demangle_type (dm));
2246 /* The pointer or reference characters follow the underlying
2247 type, as in `int*&'. */
2248 *insert_pos = result_caret_pos (dm);
2249 /* Because of the production <type> ::= <substitution>,
2250 demangle_type will already have added the underlying type as
2251 a substitution candidate. Don't do it again. */
2252 is_substitution_candidate = 0;
2256 if (is_substitution_candidate)
2257 RETURN_IF_ERROR (substitution_add (dm, substitution_start, 0));
2262 /* Demangles and emits a <type>.
2264 <type> ::= <builtin-type>
2266 ::= <class-enum-type>
2268 ::= <pointer-to-member-type>
2269 ::= <template-param>
2270 ::= <template-template-param> <template-args>
2271 ::= <CV-qualifiers> <type>
2272 ::= P <type> # pointer-to
2273 ::= R <type> # reference-to
2274 ::= C <type> # complex pair (C 2000)
2275 ::= G <type> # imaginary (C 2000)
2276 ::= U <source-name> <type> # vendor extended type qualifier
2277 ::= <substitution> */
2283 int start = substitution_start (dm);
2284 char peek = peek_char (dm);
2286 int encode_return_type = 0;
2287 template_arg_list_t old_arg_list = current_template_arg_list (dm);
2290 /* A <type> can be a <substitution>; therefore, this <type> is a
2291 substitution candidate unless a special condition holds (see
2293 int is_substitution_candidate = 1;
2295 DEMANGLE_TRACE ("type", dm);
2297 /* A <class-enum-type> can start with a digit (a <source-name>), an
2298 N (a <nested-name>), or a Z (a <local-name>). */
2299 if (IS_DIGIT ((unsigned char) peek) || peek == 'N' || peek == 'Z')
2300 RETURN_IF_ERROR (demangle_class_enum_type (dm, &encode_return_type));
2301 /* Lower-case letters begin <builtin-type>s, except for `r', which
2302 denotes restrict. */
2303 else if (peek >= 'a' && peek <= 'z' && peek != 'r')
2305 RETURN_IF_ERROR (demangle_builtin_type (dm));
2306 /* Built-in types are not substitution candidates. */
2307 is_substitution_candidate = 0;
2315 /* CV-qualifiers (including restrict). We have to demangle
2316 them off to the side, since C++ syntax puts them in a funny
2317 place for qualified pointer and reference types. */
2320 dyn_string_t cv_qualifiers = dyn_string_new (24);
2321 int old_caret_position = result_get_caret (dm);
2323 if (cv_qualifiers == NULL)
2324 return STATUS_ALLOCATION_FAILED;
2326 /* Decode all adjacent CV qualifiers. */
2327 demangle_CV_qualifiers (dm, cv_qualifiers);
2328 /* Emit them, and shift the caret left so that the
2329 underlying type will be emitted before the qualifiers. */
2330 status = result_add_string (dm, cv_qualifiers);
2331 result_shift_caret (dm, -dyn_string_length (cv_qualifiers));
2333 dyn_string_delete (cv_qualifiers);
2334 RETURN_IF_ERROR (status);
2335 /* Also prepend a blank, if needed. */
2336 RETURN_IF_ERROR (result_add_char (dm, ' '));
2337 result_shift_caret (dm, -1);
2339 /* Demangle the underlying type. It will be emitted before
2340 the CV qualifiers, since we moved the caret. */
2341 RETURN_IF_ERROR (demangle_type (dm));
2343 /* Put the caret back where it was previously. */
2344 result_set_caret (dm, old_caret_position);
2349 return "Non-pointer or -reference function type.";
2352 RETURN_IF_ERROR (demangle_array_type (dm, NULL));
2356 /* It's either a <template-param> or a
2357 <template-template-param>. In either case, demangle the
2359 RETURN_IF_ERROR (demangle_template_param (dm));
2361 /* Check for a template argument list; if one is found, it's a
2362 <template-template-param> ::= <template-param>
2363 ::= <substitution> */
2364 if (peek_char (dm) == 'I')
2366 /* Add a substitution candidate. The template parameter
2367 `T' token is a substitution candidate by itself,
2368 without the template argument list. */
2369 RETURN_IF_ERROR (substitution_add (dm, start, encode_return_type));
2371 /* Now demangle the template argument list. */
2372 RETURN_IF_ERROR (demangle_template_args (dm));
2373 /* The entire type, including the template template
2374 parameter and its argument list, will be added as a
2375 substitution candidate below. */
2381 /* First check if this is a special substitution. If it is,
2382 this is a <class-enum-type>. Special substitutions have a
2383 letter following the `S'; other substitutions have a digit
2385 peek_next = peek_char_next (dm);
2386 if (IS_DIGIT (peek_next) || peek_next == '_')
2388 RETURN_IF_ERROR (demangle_substitution (dm, &encode_return_type));
2390 /* The substituted name may have been a template name.
2391 Check if template arguments follow, and if so, demangle
2393 if (peek_char (dm) == 'I')
2394 RETURN_IF_ERROR (demangle_template_args (dm));
2396 /* A substitution token is not itself a substitution
2397 candidate. (However, if the substituted template is
2398 instantiated, the resulting type is.) */
2399 is_substitution_candidate = 0;
2403 /* Now some trickiness. We have a special substitution
2404 here. Often, the special substitution provides the
2405 name of a template that's subsequently instantiated,
2406 for instance `SaIcE' => std::allocator<char>. In these
2407 cases we need to add a substitution candidate for the
2408 entire <class-enum-type> and thus don't want to clear
2409 the is_substitution_candidate flag.
2411 However, it's possible that what we have here is a
2412 substitution token representing an entire type, such as
2413 `Ss' => std::string. In this case, we mustn't add a
2414 new substitution candidate for this substitution token.
2415 To detect this case, remember where the start of the
2416 substitution token is. */
2417 const char *next = dm->next;
2418 /* Now demangle the <class-enum-type>. */
2420 (demangle_class_enum_type (dm, &encode_return_type));
2421 /* If all that was just demangled is the two-character
2422 special substitution token, supress the addition of a
2423 new candidate for it. */
2424 if (dm->next == next + 2)
2425 is_substitution_candidate = 0;
2433 RETURN_IF_ERROR (demangle_type_ptr (dm, &insert_pos, start));
2434 /* demangle_type_ptr adds all applicable substitution
2436 is_substitution_candidate = 0;
2440 /* A C99 complex type. */
2441 RETURN_IF_ERROR (result_add (dm, "complex "));
2443 RETURN_IF_ERROR (demangle_type (dm));
2447 /* A C99 imaginary type. */
2448 RETURN_IF_ERROR (result_add (dm, "imaginary "));
2450 RETURN_IF_ERROR (demangle_type (dm));
2454 /* Vendor-extended type qualifier. */
2456 RETURN_IF_ERROR (demangle_source_name (dm));
2457 RETURN_IF_ERROR (result_add_char (dm, ' '));
2458 RETURN_IF_ERROR (demangle_type (dm));
2462 return "Unexpected character in <type>.";
2465 if (is_substitution_candidate)
2466 /* Add a new substitution for the type. If this type was a
2467 <template-param>, pass its index since from the point of
2468 substitutions; a <template-param> token is a substitution
2469 candidate distinct from the type that is substituted for it. */
2470 RETURN_IF_ERROR (substitution_add (dm, start, encode_return_type));
2472 /* Pop off template argument lists added during mangling of this
2474 pop_to_template_arg_list (dm, old_arg_list);
2479 /* C++ source names of builtin types, indexed by the mangled code
2480 letter's position in the alphabet ('a' -> 0, 'b' -> 1, etc). */
2481 static const char *const builtin_type_names[26] =
2483 "signed char", /* a */
2487 "long double", /* e */
2489 "__float128", /* g */
2490 "unsigned char", /* h */
2495 "unsigned long", /* m */
2497 "unsigned __int128", /* o */
2502 "unsigned short", /* t */
2506 "long long", /* x */
2507 "unsigned long long", /* y */
2511 /* Java source names of builtin types. Types that arn't valid in Java
2512 are also included here - we don't fail if someone attempts to demangle a
2513 C++ symbol in Java style. */
2514 static const char *const java_builtin_type_names[26] =
2516 "signed char", /* a */
2517 "boolean", /* C++ "bool" */ /* b */
2518 "byte", /* C++ "char" */ /* c */
2520 "long double", /* e */
2522 "__float128", /* g */
2523 "unsigned char", /* h */
2528 "unsigned long", /* m */
2530 "unsigned __int128", /* o */
2535 "unsigned short", /* t */
2538 "char", /* C++ "wchar_t" */ /* w */
2539 "long", /* C++ "long long" */ /* x */
2540 "unsigned long long", /* y */
2544 /* Demangles and emits a <builtin-type>.
2546 <builtin-type> ::= v # void
2551 ::= h # unsigned char
2553 ::= t # unsigned short
2555 ::= j # unsigned int
2557 ::= m # unsigned long
2558 ::= x # long long, __int64
2559 ::= y # unsigned long long, __int64
2561 ::= o # unsigned __int128
2564 ::= e # long double, __float80
2567 ::= u <source-name> # vendor extended type */
2570 demangle_builtin_type (dm)
2574 char code = peek_char (dm);
2576 DEMANGLE_TRACE ("builtin-type", dm);
2581 RETURN_IF_ERROR (demangle_source_name (dm));
2584 else if (code >= 'a' && code <= 'z')
2586 const char *type_name;
2587 /* Java uses different names for some built-in types. */
2588 if (dm->style == DMGL_JAVA)
2589 type_name = java_builtin_type_names[code - 'a'];
2591 type_name = builtin_type_names[code - 'a'];
2592 if (type_name == NULL)
2593 return "Unrecognized <builtin-type> code.";
2595 RETURN_IF_ERROR (result_add (dm, type_name));
2600 return "Non-alphabetic <builtin-type> code.";
2603 /* Demangles all consecutive CV-qualifiers (const, volatile, and
2604 restrict) at the current position. The qualifiers are appended to
2605 QUALIFIERS. Returns STATUS_OK. */
2608 demangle_CV_qualifiers (dm, qualifiers)
2610 dyn_string_t qualifiers;
2612 DEMANGLE_TRACE ("CV-qualifiers", dm);
2616 switch (peek_char (dm))
2619 if (!dyn_string_append_space (qualifiers))
2620 return STATUS_ALLOCATION_FAILED;
2621 if (!dyn_string_append_cstr (qualifiers, "restrict"))
2622 return STATUS_ALLOCATION_FAILED;
2626 if (!dyn_string_append_space (qualifiers))
2627 return STATUS_ALLOCATION_FAILED;
2628 if (!dyn_string_append_cstr (qualifiers, "volatile"))
2629 return STATUS_ALLOCATION_FAILED;
2633 if (!dyn_string_append_space (qualifiers))
2634 return STATUS_ALLOCATION_FAILED;
2635 if (!dyn_string_append_cstr (qualifiers, "const"))
2636 return STATUS_ALLOCATION_FAILED;
2647 /* Demangles and emits a <function-type>. *FUNCTION_NAME_POS is the
2648 position in the result string of the start of the function
2649 identifier, at which the function's return type will be inserted;
2650 *FUNCTION_NAME_POS is updated to position past the end of the
2651 function's return type.
2653 <function-type> ::= F [Y] <bare-function-type> E */
2656 demangle_function_type (dm, function_name_pos)
2658 int *function_name_pos;
2660 DEMANGLE_TRACE ("function-type", dm);
2661 RETURN_IF_ERROR (demangle_char (dm, 'F'));
2662 if (peek_char (dm) == 'Y')
2664 /* Indicate this function has C linkage if in verbose mode. */
2666 RETURN_IF_ERROR (result_add (dm, " [extern \"C\"] "));
2669 RETURN_IF_ERROR (demangle_bare_function_type (dm, function_name_pos));
2670 RETURN_IF_ERROR (demangle_char (dm, 'E'));
2674 /* Demangles and emits a <bare-function-type>. RETURN_TYPE_POS is the
2675 position in the result string at which the function return type
2676 should be inserted. If RETURN_TYPE_POS is BFT_NO_RETURN_TYPE, the
2677 function's return type is assumed not to be encoded.
2679 <bare-function-type> ::= <signature type>+ */
2682 demangle_bare_function_type (dm, return_type_pos)
2684 int *return_type_pos;
2686 /* Sequence is the index of the current function parameter, counting
2687 from zero. The value -1 denotes the return type. */
2689 (return_type_pos == BFT_NO_RETURN_TYPE ? 0 : -1);
2691 DEMANGLE_TRACE ("bare-function-type", dm);
2693 RETURN_IF_ERROR (result_add_char (dm, '('));
2694 while (!end_of_name_p (dm) && peek_char (dm) != 'E')
2697 /* We're decoding the function's return type. */
2699 dyn_string_t return_type;
2700 status_t status = STATUS_OK;
2702 /* Decode the return type off to the side. */
2703 RETURN_IF_ERROR (result_push (dm));
2704 RETURN_IF_ERROR (demangle_type (dm));
2705 return_type = (dyn_string_t) result_pop (dm);
2707 /* Add a space to the end of the type. Insert the return
2708 type where we've been asked to. */
2709 if (!dyn_string_append_space (return_type))
2710 status = STATUS_ALLOCATION_FAILED;
2711 if (STATUS_NO_ERROR (status))
2713 if (!dyn_string_insert (result_string (dm), *return_type_pos,
2715 status = STATUS_ALLOCATION_FAILED;
2717 *return_type_pos += dyn_string_length (return_type);
2720 dyn_string_delete (return_type);
2721 RETURN_IF_ERROR (status);
2725 /* Skip `void' parameter types. One should only occur as
2726 the only type in a parameter list; in that case, we want
2727 to print `foo ()' instead of `foo (void)'. */
2728 if (peek_char (dm) == 'v')
2729 /* Consume the v. */
2733 /* Separate parameter types by commas. */
2735 RETURN_IF_ERROR (result_add (dm, ", "));
2736 /* Demangle the type. */
2737 RETURN_IF_ERROR (demangle_type (dm));
2743 RETURN_IF_ERROR (result_add_char (dm, ')'));
2745 /* We should have demangled at least one parameter type (which would
2746 be void, for a function that takes no parameters), plus the
2747 return type, if we were supposed to demangle that. */
2749 return "Missing function return type.";
2750 else if (sequence == 0)
2751 return "Missing function parameter.";
2756 /* Demangles and emits a <class-enum-type>. *ENCODE_RETURN_TYPE is set to
2757 non-zero if the type is a template-id, zero otherwise.
2759 <class-enum-type> ::= <name> */
2762 demangle_class_enum_type (dm, encode_return_type)
2764 int *encode_return_type;
2766 DEMANGLE_TRACE ("class-enum-type", dm);
2768 RETURN_IF_ERROR (demangle_name (dm, encode_return_type));
2772 /* Demangles and emits an <array-type>.
2774 If PTR_INSERT_POS is not NULL, the array type is formatted as a
2775 pointer or reference to an array, except that asterisk and
2776 ampersand punctuation is omitted (since it's not know at this
2777 point). *PTR_INSERT_POS is set to the position in the demangled
2778 name at which this punctuation should be inserted. For example,
2779 `A10_i' is demangled to `int () [10]' and *PTR_INSERT_POS points
2780 between the parentheses.
2782 If PTR_INSERT_POS is NULL, the array type is assumed not to be
2783 pointer- or reference-qualified. Then, for example, `A10_i' is
2784 demangled simply as `int[10]'.
2786 <array-type> ::= A [<dimension number>] _ <element type>
2787 ::= A <dimension expression> _ <element type> */
2790 demangle_array_type (dm, ptr_insert_pos)
2792 int *ptr_insert_pos;
2794 status_t status = STATUS_OK;
2795 dyn_string_t array_size = NULL;
2798 DEMANGLE_TRACE ("array-type", dm);
2800 RETURN_IF_ERROR (demangle_char (dm, 'A'));
2802 /* Demangle the array size into array_size. */
2803 peek = peek_char (dm);
2805 /* Array bound is omitted. This is a C99-style VLA. */
2807 else if (IS_DIGIT (peek_char (dm)))
2809 /* It looks like a constant array bound. */
2810 array_size = dyn_string_new (10);
2811 if (array_size == NULL)
2812 return STATUS_ALLOCATION_FAILED;
2813 status = demangle_number_literally (dm, array_size, 10, 0);
2817 /* Anything is must be an expression for a nont-constant array
2818 bound. This happens if the array type occurs in a template
2819 and the array bound references a template parameter. */
2820 RETURN_IF_ERROR (result_push (dm));
2821 RETURN_IF_ERROR (demangle_expression (dm));
2822 array_size = (dyn_string_t) result_pop (dm);
2824 /* array_size may have been allocated by now, so we can't use
2825 RETURN_IF_ERROR until it's been deallocated. */
2827 /* Demangle the base type of the array. */
2828 if (STATUS_NO_ERROR (status))
2829 status = demangle_char (dm, '_');
2830 if (STATUS_NO_ERROR (status))
2831 status = demangle_type (dm);
2833 if (ptr_insert_pos != NULL)
2835 /* This array is actually part of an pointer- or
2836 reference-to-array type. Format appropriately, except we
2837 don't know which and how much punctuation to use. */
2838 if (STATUS_NO_ERROR (status))
2839 status = result_add (dm, " () ");
2840 /* Let the caller know where to insert the punctuation. */
2841 *ptr_insert_pos = result_caret_pos (dm) - 2;
2844 /* Emit the array dimension syntax. */
2845 if (STATUS_NO_ERROR (status))
2846 status = result_add_char (dm, '[');
2847 if (STATUS_NO_ERROR (status) && array_size != NULL)
2848 status = result_add_string (dm, array_size);
2849 if (STATUS_NO_ERROR (status))
2850 status = result_add_char (dm, ']');
2851 if (array_size != NULL)
2852 dyn_string_delete (array_size);
2854 RETURN_IF_ERROR (status);
2859 /* Demangles and emits a <template-param>.
2861 <template-param> ::= T_ # first template parameter
2862 ::= T <parameter-2 number> _ */
2865 demangle_template_param (dm)
2869 template_arg_list_t current_arg_list = current_template_arg_list (dm);
2872 DEMANGLE_TRACE ("template-param", dm);
2874 /* Make sure there is a template argmust list in which to look up
2875 this parameter reference. */
2876 if (current_arg_list == NULL)
2877 return "Template parameter outside of template.";
2879 RETURN_IF_ERROR (demangle_char (dm, 'T'));
2880 if (peek_char (dm) == '_')
2884 RETURN_IF_ERROR (demangle_number (dm, &parm_number, 10, 0));
2887 RETURN_IF_ERROR (demangle_char (dm, '_'));
2889 arg = template_arg_list_get_arg (current_arg_list, parm_number);
2891 /* parm_number exceeded the number of arguments in the current
2892 template argument list. */
2893 return "Template parameter number out of bounds.";
2894 RETURN_IF_ERROR (result_add_string (dm, (dyn_string_t) arg));
2899 /* Demangles and emits a <template-args>.
2901 <template-args> ::= I <template-arg>+ E */
2904 demangle_template_args (dm)
2908 dyn_string_t old_last_source_name;
2909 template_arg_list_t arg_list = template_arg_list_new ();
2911 if (arg_list == NULL)
2912 return STATUS_ALLOCATION_FAILED;
2914 /* Preserve the most recently demangled source name. */
2915 old_last_source_name = dm->last_source_name;
2916 dm->last_source_name = dyn_string_new (0);
2918 DEMANGLE_TRACE ("template-args", dm);
2920 if (dm->last_source_name == NULL)
2921 return STATUS_ALLOCATION_FAILED;
2923 RETURN_IF_ERROR (demangle_char (dm, 'I'));
2924 RETURN_IF_ERROR (result_open_template_list (dm));
2932 RETURN_IF_ERROR (result_add (dm, ", "));
2934 /* Capture the template arg. */
2935 RETURN_IF_ERROR (result_push (dm));
2936 RETURN_IF_ERROR (demangle_template_arg (dm));
2937 arg = result_pop (dm);
2939 /* Emit it in the demangled name. */
2940 RETURN_IF_ERROR (result_add_string (dm, (dyn_string_t) arg));
2942 /* Save it for use in expanding <template-param>s. */
2943 template_arg_list_add_arg (arg_list, arg);
2945 while (peek_char (dm) != 'E');
2946 /* Append the '>'. */
2947 RETURN_IF_ERROR (result_close_template_list (dm));
2949 /* Consume the 'E'. */
2952 /* Restore the most recent demangled source name. */
2953 dyn_string_delete (dm->last_source_name);
2954 dm->last_source_name = old_last_source_name;
2956 /* Push the list onto the top of the stack of template argument
2957 lists, so that arguments from it are used from now on when
2958 expanding <template-param>s. */
2959 push_template_arg_list (dm, arg_list);
2964 /* This function, which does not correspond to a production in the
2965 mangling spec, handles the `literal' production for both
2966 <template-arg> and <expr-primary>. It does not expect or consume
2967 the initial `L' or final `E'. The demangling is given by:
2969 <literal> ::= <type> </value/ number>
2971 and the emitted output is `(type)number'. */
2974 demangle_literal (dm)
2977 char peek = peek_char (dm);
2978 dyn_string_t value_string;
2981 DEMANGLE_TRACE ("literal", dm);
2983 if (!flag_verbose && peek >= 'a' && peek <= 'z')
2985 /* If not in verbose mode and this is a builtin type, see if we
2986 can produce simpler numerical output. In particular, for
2987 integer types shorter than `long', just write the number
2988 without type information; for bools, write `true' or `false'.
2989 Other refinements could be made here too. */
2991 /* This constant string is used to map from <builtin-type> codes
2992 (26 letters of the alphabet) to codes that determine how the
2993 value will be displayed. The codes are:
2997 A space means the value will be represented using cast
2999 static const char *const code_map = "ibi iii ll ii i ";
3001 char code = code_map[peek - 'a'];
3002 /* FIXME: Implement demangling of floats and doubles. */
3004 return STATUS_UNIMPLEMENTED;
3007 /* It's a boolean. */
3010 /* Consume the b. */
3012 /* Look at the next character. It should be 0 or 1,
3013 corresponding to false or true, respectively. */
3014 value = peek_char (dm);
3016 RETURN_IF_ERROR (result_add (dm, "false"));
3017 else if (value == '1')
3018 RETURN_IF_ERROR (result_add (dm, "true"));
3020 return "Unrecognized bool constant.";
3021 /* Consume the 0 or 1. */
3025 else if (code == 'i' || code == 'l')
3027 /* It's an integer or long. */
3029 /* Consume the type character. */
3032 /* Demangle the number and write it out. */
3033 value_string = dyn_string_new (0);
3034 status = demangle_number_literally (dm, value_string, 10, 1);
3035 if (STATUS_NO_ERROR (status))
3036 status = result_add_string (dm, value_string);
3037 /* For long integers, append an l. */
3038 if (code == 'l' && STATUS_NO_ERROR (status))
3039 status = result_add_char (dm, code);
3040 dyn_string_delete (value_string);
3042 RETURN_IF_ERROR (status);
3045 /* ...else code == ' ', so fall through to represent this
3046 literal's type explicitly using cast syntax. */
3049 RETURN_IF_ERROR (result_add_char (dm, '('));
3050 RETURN_IF_ERROR (demangle_type (dm));
3051 RETURN_IF_ERROR (result_add_char (dm, ')'));
3053 value_string = dyn_string_new (0);
3054 if (value_string == NULL)
3055 return STATUS_ALLOCATION_FAILED;
3057 status = demangle_number_literally (dm, value_string, 10, 1);
3058 if (STATUS_NO_ERROR (status))
3059 status = result_add_string (dm, value_string);
3060 dyn_string_delete (value_string);
3061 RETURN_IF_ERROR (status);
3066 /* Demangles and emits a <template-arg>.
3068 <template-arg> ::= <type> # type
3069 ::= L <type> <value number> E # literal
3070 ::= LZ <encoding> E # external name
3071 ::= X <expression> E # expression */
3074 demangle_template_arg (dm)
3077 DEMANGLE_TRACE ("template-arg", dm);
3079 switch (peek_char (dm))
3084 if (peek_char (dm) == 'Z')
3086 /* External name. */
3088 /* FIXME: Standard is contradictory here. */
3089 RETURN_IF_ERROR (demangle_encoding (dm));
3092 RETURN_IF_ERROR (demangle_literal (dm));
3093 RETURN_IF_ERROR (demangle_char (dm, 'E'));
3099 RETURN_IF_ERROR (demangle_expression (dm));
3100 RETURN_IF_ERROR (demangle_char (dm, 'E'));
3104 RETURN_IF_ERROR (demangle_type (dm));
3111 /* Demangles and emits an <expression>.
3113 <expression> ::= <unary operator-name> <expression>
3114 ::= <binary operator-name> <expression> <expression>
3116 ::= <scope-expression> */
3119 demangle_expression (dm)
3122 char peek = peek_char (dm);
3124 DEMANGLE_TRACE ("expression", dm);
3126 if (peek == 'L' || peek == 'T')
3127 RETURN_IF_ERROR (demangle_expr_primary (dm));
3128 else if (peek == 's' && peek_char_next (dm) == 'r')
3129 RETURN_IF_ERROR (demangle_scope_expression (dm));
3131 /* An operator expression. */
3134 status_t status = STATUS_OK;
3135 dyn_string_t operator_name;
3137 /* We have an operator name. Since we want to output binary
3138 operations in infix notation, capture the operator name
3140 RETURN_IF_ERROR (result_push (dm));
3141 RETURN_IF_ERROR (demangle_operator_name (dm, 1, &num_args));
3142 operator_name = (dyn_string_t) result_pop (dm);
3144 /* If it's binary, do an operand first. */
3147 status = result_add_char (dm, '(');
3148 if (STATUS_NO_ERROR (status))
3149 status = demangle_expression (dm);
3150 if (STATUS_NO_ERROR (status))
3151 status = result_add_char (dm, ')');
3154 /* Emit the operator. */
3155 if (STATUS_NO_ERROR (status))
3156 status = result_add_string (dm, operator_name);
3157 dyn_string_delete (operator_name);
3158 RETURN_IF_ERROR (status);
3160 /* Emit its second (if binary) or only (if unary) operand. */
3161 RETURN_IF_ERROR (result_add_char (dm, '('));
3162 RETURN_IF_ERROR (demangle_expression (dm));
3163 RETURN_IF_ERROR (result_add_char (dm, ')'));
3165 /* The ternary operator takes a third operand. */
3168 RETURN_IF_ERROR (result_add (dm, ":("));
3169 RETURN_IF_ERROR (demangle_expression (dm));
3170 RETURN_IF_ERROR (result_add_char (dm, ')'));
3177 /* Demangles and emits a <scope-expression>.
3179 <scope-expression> ::= sr <qualifying type> <source-name>
3180 ::= sr <qualifying type> <encoding> */
3183 demangle_scope_expression (dm)
3186 RETURN_IF_ERROR (demangle_char (dm, 's'));
3187 RETURN_IF_ERROR (demangle_char (dm, 'r'));
3188 RETURN_IF_ERROR (demangle_type (dm));
3189 RETURN_IF_ERROR (result_add (dm, "::"));
3190 RETURN_IF_ERROR (demangle_encoding (dm));
3194 /* Demangles and emits an <expr-primary>.
3196 <expr-primary> ::= <template-param>
3197 ::= L <type> <value number> E # literal
3198 ::= L <mangled-name> E # external name */
3201 demangle_expr_primary (dm)
3204 char peek = peek_char (dm);
3206 DEMANGLE_TRACE ("expr-primary", dm);
3209 RETURN_IF_ERROR (demangle_template_param (dm));
3210 else if (peek == 'L')
3212 /* Consume the `L'. */
3214 peek = peek_char (dm);
3217 RETURN_IF_ERROR (demangle_mangled_name (dm));
3219 RETURN_IF_ERROR (demangle_literal (dm));
3221 RETURN_IF_ERROR (demangle_char (dm, 'E'));
3224 return STATUS_ERROR;
3229 /* Demangles and emits a <substitution>. Sets *TEMPLATE_P to non-zero
3230 if the substitution is the name of a template, zero otherwise.
3232 <substitution> ::= S <seq-id> _
3236 ::= Sa # ::std::allocator
3237 ::= Sb # ::std::basic_string
3238 ::= Ss # ::std::basic_string<char,
3239 ::std::char_traits<char>,
3240 ::std::allocator<char> >
3241 ::= Si # ::std::basic_istream<char,
3242 std::char_traits<char> >
3243 ::= So # ::std::basic_ostream<char,
3244 std::char_traits<char> >
3245 ::= Sd # ::std::basic_iostream<char,
3246 std::char_traits<char> >
3250 demangle_substitution (dm, template_p)
3258 DEMANGLE_TRACE ("substitution", dm);
3260 RETURN_IF_ERROR (demangle_char (dm, 'S'));
3262 /* Scan the substitution sequence index. A missing number denotes
3264 peek = peek_char (dm);
3267 /* If the following character is 0-9 or a capital letter, interpret
3268 the sequence up to the next underscore as a base-36 substitution
3270 else if (IS_DIGIT ((unsigned char) peek)
3271 || (peek >= 'A' && peek <= 'Z'))
3272 RETURN_IF_ERROR (demangle_number (dm, &seq_id, 36, 0));
3275 const char *new_last_source_name = NULL;
3280 RETURN_IF_ERROR (result_add (dm, "std"));
3284 RETURN_IF_ERROR (result_add (dm, "std::allocator"));
3285 new_last_source_name = "allocator";
3290 RETURN_IF_ERROR (result_add (dm, "std::basic_string"));
3291 new_last_source_name = "basic_string";
3298 RETURN_IF_ERROR (result_add (dm, "std::string"));
3299 new_last_source_name = "string";
3303 RETURN_IF_ERROR (result_add (dm, "std::basic_string<char, std::char_traits<char>, std::allocator<char> >"));
3304 new_last_source_name = "basic_string";
3312 RETURN_IF_ERROR (result_add (dm, "std::istream"));
3313 new_last_source_name = "istream";
3317 RETURN_IF_ERROR (result_add (dm, "std::basic_istream<char, std::char_traints<char> >"));
3318 new_last_source_name = "basic_istream";
3326 RETURN_IF_ERROR (result_add (dm, "std::ostream"));
3327 new_last_source_name = "ostream";
3331 RETURN_IF_ERROR (result_add (dm, "std::basic_ostream<char, std::char_traits<char> >"));
3332 new_last_source_name = "basic_ostream";
3340 RETURN_IF_ERROR (result_add (dm, "std::iostream"));
3341 new_last_source_name = "iostream";
3345 RETURN_IF_ERROR (result_add (dm, "std::basic_iostream<char, std::char_traits<char> >"));
3346 new_last_source_name = "basic_iostream";
3352 return "Unrecognized <substitution>.";
3355 /* Consume the character we just processed. */
3358 if (new_last_source_name != NULL)
3360 if (!dyn_string_copy_cstr (dm->last_source_name,
3361 new_last_source_name))
3362 return STATUS_ALLOCATION_FAILED;
3368 /* Look up the substitution text. Since `S_' is the most recent
3369 substitution, `S0_' is the second-most-recent, etc., shift the
3370 numbering by one. */
3371 text = substitution_get (dm, seq_id + 1, template_p);
3373 return "Substitution number out of range.";
3375 /* Emit the substitution text. */
3376 RETURN_IF_ERROR (result_add_string (dm, text));
3378 RETURN_IF_ERROR (demangle_char (dm, '_'));
3382 /* Demangles and emits a <local-name>.
3384 <local-name> := Z <function encoding> E <entity name> [<discriminator>]
3385 := Z <function encoding> E s [<discriminator>] */
3388 demangle_local_name (dm)
3391 DEMANGLE_TRACE ("local-name", dm);
3393 RETURN_IF_ERROR (demangle_char (dm, 'Z'));
3394 RETURN_IF_ERROR (demangle_encoding (dm));
3395 RETURN_IF_ERROR (demangle_char (dm, 'E'));
3396 RETURN_IF_ERROR (result_add (dm, "::"));
3398 if (peek_char (dm) == 's')
3400 /* Local character string literal. */
3401 RETURN_IF_ERROR (result_add (dm, "string literal"));
3402 /* Consume the s. */
3404 RETURN_IF_ERROR (demangle_discriminator (dm, 0));
3409 /* Local name for some other entity. Demangle its name. */
3410 RETURN_IF_ERROR (demangle_name (dm, &unused));
3411 RETURN_IF_ERROR (demangle_discriminator (dm, 1));
3417 /* Optimonally demangles and emits a <discriminator>. If there is no
3418 <discriminator> at the current position in the mangled string, the
3419 descriminator is assumed to be zero. Emit the discriminator number
3420 in parentheses, unless SUPPRESS_FIRST is non-zero and the
3421 discriminator is zero.
3423 <discriminator> ::= _ <number> */
3426 demangle_discriminator (dm, suppress_first)
3430 /* Output for <discriminator>s to the demangled name is completely
3431 suppressed if not in verbose mode. */
3433 if (peek_char (dm) == '_')
3435 /* Consume the underscore. */
3438 RETURN_IF_ERROR (result_add (dm, " [#"));
3439 /* Check if there's a number following the underscore. */
3440 if (IS_DIGIT ((unsigned char) peek_char (dm)))
3443 /* Demangle the number. */
3444 RETURN_IF_ERROR (demangle_number (dm, &discriminator, 10, 0));
3446 /* Write the discriminator. The mangled number is two
3447 less than the discriminator ordinal, counting from
3449 RETURN_IF_ERROR (int_to_dyn_string (discriminator + 1,
3450 (dyn_string_t) dm->result));
3453 return STATUS_ERROR;
3455 RETURN_IF_ERROR (result_add_char (dm, ']'));
3457 else if (!suppress_first)
3460 RETURN_IF_ERROR (result_add (dm, " [#0]"));
3466 /* Demangle NAME into RESULT, which must be an initialized
3467 dyn_string_t. On success, returns STATUS_OK. On failure, returns
3468 an error message, and the contents of RESULT are unchanged. */
3471 cp_demangle (name, result, style)
3473 dyn_string_t result;
3477 int length = strlen (name);
3479 if (length > 2 && name[0] == '_' && name[1] == 'Z')
3481 demangling_t dm = demangling_new (name, style);
3483 return STATUS_ALLOCATION_FAILED;
3485 status = result_push (dm);
3486 if (status != STATUS_OK)
3488 demangling_delete (dm);
3492 status = demangle_mangled_name (dm);
3493 if (STATUS_NO_ERROR (status))
3495 dyn_string_t demangled = (dyn_string_t) result_pop (dm);
3496 if (!dyn_string_copy (result, demangled))
3497 return STATUS_ALLOCATION_FAILED;
3498 dyn_string_delete (demangled);
3501 demangling_delete (dm);
3505 /* It's evidently not a mangled C++ name. It could be the name
3506 of something with C linkage, though, so just copy NAME into
3508 if (!dyn_string_copy_cstr (result, name))
3509 return STATUS_ALLOCATION_FAILED;
3516 /* Demangle TYPE_NAME into RESULT, which must be an initialized
3517 dyn_string_t. On success, returns STATUS_OK. On failiure, returns
3518 an error message, and the contents of RESULT are unchanged. */
3522 cp_demangle_type (type_name, result)
3523 const char* type_name;
3524 dyn_string_t result;
3527 demangling_t dm = demangling_new (type_name);
3530 return STATUS_ALLOCATION_FAILED;
3532 /* Demangle the type name. The demangled name is stored in dm. */
3533 status = result_push (dm);
3534 if (status != STATUS_OK)
3536 demangling_delete (dm);
3540 status = demangle_type (dm);
3542 if (STATUS_NO_ERROR (status))
3544 /* The demangling succeeded. Pop the result out of dm and copy
3546 dyn_string_t demangled = (dyn_string_t) result_pop (dm);
3547 if (!dyn_string_copy (result, demangled))
3548 return STATUS_ALLOCATION_FAILED;
3549 dyn_string_delete (demangled);
3553 demangling_delete (dm);
3558 extern char *__cxa_demangle PARAMS ((const char *, char *, size_t *, int *));
3560 /* ia64 ABI-mandated entry point in the C++ runtime library for performing
3561 demangling. MANGLED_NAME is a NUL-terminated character string
3562 containing the name to be demangled.
3564 OUTPUT_BUFFER is a region of memory, allocated with malloc, of
3565 *LENGTH bytes, into which the demangled name is stored. If
3566 OUTPUT_BUFFER is not long enough, it is expanded using realloc.
3567 OUTPUT_BUFFER may instead be NULL; in that case, the demangled name
3568 is placed in a region of memory allocated with malloc.
3570 If LENGTH is non-NULL, the length of the buffer conaining the
3571 demangled name, is placed in *LENGTH.
3573 The return value is a pointer to the start of the NUL-terminated
3574 demangled name, or NULL if the demangling fails. The caller is
3575 responsible for deallocating this memory using free.
3577 *STATUS is set to one of the following values:
3578 0: The demangling operation succeeded.
3579 -1: A memory allocation failiure occurred.
3580 -2: MANGLED_NAME is not a valid name under the C++ ABI mangling rules.
3581 -3: One of the arguments is invalid.
3583 The demagling is performed using the C++ ABI mangling rules, with
3587 __cxa_demangle (mangled_name, output_buffer, length, status)
3588 const char *mangled_name;
3589 char *output_buffer;
3593 struct dyn_string demangled_name;
3599 if (mangled_name == NULL) {
3604 /* Did the caller provide a buffer for the demangled name? */
3605 if (output_buffer == NULL) {
3606 /* No; dyn_string will malloc a buffer for us. */
3607 if (!dyn_string_init (&demangled_name, 0))
3614 /* Yes. Check that the length was provided. */
3615 if (length == NULL) {
3619 /* Install the buffer into a dyn_string. */
3620 demangled_name.allocated = *length;
3621 demangled_name.length = 0;
3622 demangled_name.s = output_buffer;
3625 if (mangled_name[0] == '_' && mangled_name[1] == 'Z')
3626 /* MANGLED_NAME apprears to be a function or variable name.
3627 Demangle it accordingly. */
3628 result = cp_demangle (mangled_name, &demangled_name, 0);
3630 /* Try to demangled MANGLED_NAME as the name of a type. */
3631 result = cp_demangle_type (mangled_name, &demangled_name);
3633 if (result == STATUS_OK)
3634 /* The demangling succeeded. */
3636 /* If LENGTH isn't NULL, store the allocated buffer length
3637 there; the buffer may have been realloced by dyn_string
3640 *length = demangled_name.allocated;
3641 /* The operation was a success. */
3643 return dyn_string_buf (&demangled_name);
3645 else if (result == STATUS_ALLOCATION_FAILED)
3646 /* A call to malloc or realloc failed during the demangling
3653 /* The demangling failed for another reason, most probably because
3654 MANGLED_NAME isn't a valid mangled name. */
3656 /* If the buffer containing the demangled name wasn't provided
3657 by the caller, free it. */
3658 if (output_buffer == NULL)
3659 free (dyn_string_buf (&demangled_name));
3665 #else /* !IN_LIBGCC2 */
3667 /* Variant entry point for integration with the existing cplus-dem
3668 demangler. Attempts to demangle MANGLED. If the demangling
3669 succeeds, returns a buffer, allocated with malloc, containing the
3670 demangled name. The caller must deallocate the buffer using free.
3671 If the demangling failes, returns NULL. */
3674 cplus_demangle_v3 (mangled)
3675 const char* mangled;
3677 dyn_string_t demangled;
3680 /* If this isn't a mangled name, don't pretend to demangle it. */
3681 if (strncmp (mangled, "_Z", 2) != 0)
3684 /* Create a dyn_string to hold the demangled name. */
3685 demangled = dyn_string_new (0);
3686 /* Attempt the demangling. */
3687 status = cp_demangle ((char *) mangled, demangled, 0);
3689 if (STATUS_NO_ERROR (status))
3690 /* Demangling succeeded. */
3692 /* Grab the demangled result from the dyn_string. It was
3693 allocated with malloc, so we can return it directly. */
3694 char *return_value = dyn_string_release (demangled);
3695 /* Hand back the demangled name. */
3696 return return_value;
3698 else if (status == STATUS_ALLOCATION_FAILED)
3700 fprintf (stderr, "Memory allocation failed.\n");
3704 /* Demangling failed. */
3706 dyn_string_delete (demangled);
3711 /* Demangle a Java symbol. Java uses a subset of the V3 ABI C++ mangling
3712 conventions, but the output formatting is a little different.
3713 This instructs the C++ demangler not to emit pointer characters ("*"), and
3714 to use Java's namespace separator symbol ("." instead of "::"). It then
3715 does an additional pass over the demangled output to replace instances
3716 of JArray<TYPE> with TYPE[]. */
3719 java_demangle_v3 (mangled)
3720 const char* mangled;
3722 dyn_string_t demangled;
3728 char *cplus_demangled;
3731 /* Create a dyn_string to hold the demangled name. */
3732 demangled = dyn_string_new (0);
3734 /* Attempt the demangling. */
3735 status = cp_demangle ((char *) mangled, demangled, DMGL_JAVA);
3737 if (STATUS_NO_ERROR (status))
3738 /* Demangling succeeded. */
3740 /* Grab the demangled result from the dyn_string. */
3741 cplus_demangled = dyn_string_release (demangled);
3743 else if (status == STATUS_ALLOCATION_FAILED)
3745 fprintf (stderr, "Memory allocation failed.\n");
3749 /* Demangling failed. */
3751 dyn_string_delete (demangled);
3755 len = strlen (cplus_demangled);
3756 next = cplus_demangled;
3760 /* Replace occurances of JArray<TYPE> with TYPE[]. */
3763 char *open_str = strstr (next, "JArray<");
3764 char *close_str = NULL;
3766 close_str = strchr (next, '>');
3768 if (open_str != NULL && (close_str == NULL || close_str > open_str))
3773 demangled = dyn_string_new(len);
3775 /* Copy prepending symbols, if any. */
3776 if (open_str > next)
3779 dyn_string_append_cstr (demangled, next);
3781 next = open_str + 7;
3783 else if (close_str != NULL)
3787 /* Copy prepending type symbol, if any. Squash any spurious
3789 if (close_str > next && next[0] != ' ')
3792 dyn_string_append_cstr (demangled, next);
3794 dyn_string_append_cstr (demangled, "[]");
3795 next = close_str + 1;
3799 /* There are no more arrays. Copy the rest of the symbol, or
3800 simply return the original symbol if no changes were made. */
3801 if (next == cplus_demangled)
3802 return cplus_demangled;
3804 dyn_string_append_cstr (demangled, next);
3809 free (cplus_demangled);
3811 return_value = dyn_string_release (demangled);
3812 return return_value;
3815 #endif /* IN_LIBGCC2 */
3818 /* Demangle NAME in the G++ V3 ABI demangling style, and return either
3819 zero, indicating that some error occurred, or a demangling_t
3820 holding the results. */
3822 demangle_v3_with_details (name)
3828 if (strncmp (name, "_Z", 2))
3831 dm = demangling_new (name, DMGL_GNU_V3);
3834 fprintf (stderr, "Memory allocation failed.\n");
3838 status = result_push (dm);
3839 if (! STATUS_NO_ERROR (status))
3841 demangling_delete (dm);
3842 fprintf (stderr, "%s\n", status);
3846 status = demangle_mangled_name (dm);
3847 if (STATUS_NO_ERROR (status))
3850 demangling_delete (dm);
3855 /* Return non-zero iff NAME is the mangled form of a constructor name
3856 in the G++ V3 ABI demangling style. Specifically, return:
3857 - '1' if NAME is a complete object constructor,
3858 - '2' if NAME is a base object constructor, or
3859 - '3' if NAME is a complete object allocating constructor. */
3860 enum gnu_v3_ctor_kinds
3861 is_gnu_v3_mangled_ctor (name)
3864 demangling_t dm = demangle_v3_with_details (name);
3868 enum gnu_v3_ctor_kinds result = dm->is_constructor;
3869 demangling_delete (dm);
3877 /* Return non-zero iff NAME is the mangled form of a destructor name
3878 in the G++ V3 ABI demangling style. Specifically, return:
3879 - '0' if NAME is a deleting destructor,
3880 - '1' if NAME is a complete object destructor, or
3881 - '2' if NAME is a base object destructor. */
3882 enum gnu_v3_dtor_kinds
3883 is_gnu_v3_mangled_dtor (name)
3886 demangling_t dm = demangle_v3_with_details (name);
3890 enum gnu_v3_dtor_kinds result = dm->is_destructor;
3891 demangling_delete (dm);
3899 #ifdef STANDALONE_DEMANGLER
3903 static void print_usage
3904 PARAMS ((FILE* fp, int exit_value));
3906 /* Non-zero if CHAR is a character than can occur in a mangled name. */
3907 #define is_mangled_char(CHAR) \
3908 (IS_ALPHA (CHAR) || IS_DIGIT (CHAR) \
3909 || (CHAR) == '_' || (CHAR) == '.' || (CHAR) == '$')
3911 /* The name of this program, as invoked. */
3912 const char* program_name;
3914 /* Prints usage summary to FP and then exits with EXIT_VALUE. */
3917 print_usage (fp, exit_value)
3921 fprintf (fp, "Usage: %s [options] [names ...]\n", program_name);
3922 fprintf (fp, "Options:\n");
3923 fprintf (fp, " -h,--help Display this message.\n");
3924 fprintf (fp, " -s,--strict Demangle standard names only.\n");
3925 fprintf (fp, " -v,--verbose Produce verbose demanglings.\n");
3926 fprintf (fp, "If names are provided, they are demangled. Otherwise filters standard input.\n");
3931 /* Option specification for getopt_long. */
3932 static struct option long_options[] =
3934 { "help", no_argument, NULL, 'h' },
3935 { "strict", no_argument, NULL, 's' },
3936 { "verbose", no_argument, NULL, 'v' },
3937 { NULL, no_argument, NULL, 0 },
3940 /* Main entry for a demangling filter executable. It will demangle
3941 its command line arguments, if any. If none are provided, it will
3942 filter stdin to stdout, replacing any recognized mangled C++ names
3943 with their demangled equivalents. */
3954 /* Use the program name of this program, as invoked. */
3955 program_name = argv[0];
3957 /* Parse options. */
3960 opt_char = getopt_long (argc, argv, "hsv", long_options, NULL);
3963 case '?': /* Unrecognized option. */
3964 print_usage (stderr, 1);
3968 print_usage (stdout, 0);
3980 while (opt_char != -1);
3983 /* No command line arguments were provided. Filter stdin. */
3985 dyn_string_t mangled = dyn_string_new (3);
3986 dyn_string_t demangled = dyn_string_new (0);
3989 /* Read all of input. */
3990 while (!feof (stdin))
3992 char c = getchar ();
3994 /* The first character of a mangled name is an underscore. */
3999 /* It's not a mangled name. Print the character and go
4006 /* The second character of a mangled name is a capital `Z'. */
4011 /* It's not a mangled name. Print the previous
4012 underscore, the `Z', and go on. */
4018 /* Start keeping track of the candidate mangled name. */
4019 dyn_string_append_char (mangled, '_');
4020 dyn_string_append_char (mangled, 'Z');
4022 /* Pile characters into mangled until we hit one that can't
4023 occur in a mangled name. */
4025 while (!feof (stdin) && is_mangled_char (c))
4027 dyn_string_append_char (mangled, c);
4033 /* Attempt to demangle the name. */
4034 status = cp_demangle (dyn_string_buf (mangled), demangled, 0);
4036 /* If the demangling succeeded, great! Print out the
4037 demangled version. */
4038 if (STATUS_NO_ERROR (status))
4039 fputs (dyn_string_buf (demangled), stdout);
4040 /* Abort on allocation failures. */
4041 else if (status == STATUS_ALLOCATION_FAILED)
4043 fprintf (stderr, "Memory allocation failed.\n");
4046 /* Otherwise, it might not have been a mangled name. Just
4047 print out the original text. */
4049 fputs (dyn_string_buf (mangled), stdout);
4051 /* If we haven't hit EOF yet, we've read one character that
4052 can't occur in a mangled name, so print it out. */
4056 /* Clear the candidate mangled name, to start afresh next
4057 time we hit a `_Z'. */
4058 dyn_string_clear (mangled);
4061 dyn_string_delete (mangled);
4062 dyn_string_delete (demangled);
4065 /* Demangle command line arguments. */
4067 dyn_string_t result = dyn_string_new (0);
4069 /* Loop over command line arguments. */
4070 for (i = optind; i < argc; ++i)
4072 /* Attempt to demangle. */
4073 status = cp_demangle (argv[i], result, 0);
4075 /* If it worked, print the demangled name. */
4076 if (STATUS_NO_ERROR (status))
4077 printf ("%s\n", dyn_string_buf (result));
4078 /* Abort on allocaiton failures. */
4079 else if (status == STATUS_ALLOCATION_FAILED)
4081 fprintf (stderr, "Memory allocation failed.\n");
4084 /* If not, print the error message to stderr instead. */
4086 fprintf (stderr, "%s\n", status);
4088 dyn_string_delete (result);
4094 #endif /* STANDALONE_DEMANGLER */