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redid RT #1353 fix in 1.53 so that it does not free

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file names while they are still referenced from the parse tree
This commit is contained in:
Andreas Gustafsson
2001-06-07 01:58:49 +00:00
parent 90c845947a
commit 8b9fa5b005
1 changed files with 40 additions and 20 deletions
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60
lib/isccfg/parser.c
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@@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: parser.c,v 1.54 2001/06/01 15:17:19 marka Exp $ */
/* $Id: parser.c,v 1.55 2001/06/07 01:58:49 gson Exp $ */
#include <config.h>
@@ -122,15 +122,24 @@ struct cfg_parser {
isc_boolean_t ungotten;
/*
* A list of all files ever opened by this
* parser (including ones that have already
* been closed), as a configuration list of
* configuration strings. The "file" fields of
* all other configuration objects point into
* this list so that each does not need its
* own copy of the filename strings.
* The stack of currently active files, represented
* as a configuration list of configuration strings.
* The head is the top-level file, subsequent elements
* (if any) are the nested include files, and the
* last element is the file currently being parsed.
*/
cfg_obj_t * files;
cfg_obj_t * open_files;
/*
* Names of files that we have parsed and closed
* and were previously on the open_file list.
* We keep these objects around after closing
* the files because the file names may still be
* referenced from other configuration objects
* for use in reporting semantic errors after
* parsing is complete.
*/
cfg_obj_t * closed_files;
/*
* Current line number. We maintain our own
@@ -1346,7 +1355,8 @@ cfg_parser_create(isc_mem_t *mctx, isc_log_t *lctx, cfg_parser_t **ret)
pctx->seen_eof = ISC_FALSE;
pctx->ungotten = ISC_FALSE;
pctx->errors = 0;
pctx->files = 0;
pctx->open_files = NULL;
pctx->closed_files = NULL;
pctx->line = 0;
pctx->callback = NULL;
pctx->callbackarg = NULL;
@@ -1366,7 +1376,8 @@ cfg_parser_create(isc_mem_t *mctx, isc_log_t *lctx, cfg_parser_t **ret)
ISC_LEXCOMMENT_CPLUSPLUS |
ISC_LEXCOMMENT_SHELL));
CHECK(create_list(pctx, &cfg_type_filelist, &pctx->files));
CHECK(create_list(pctx, &cfg_type_filelist, &pctx->open_files));
CHECK(create_list(pctx, &cfg_type_filelist, &pctx->closed_files));
*ret = pctx;
return (ISC_R_SUCCESS);
@@ -1374,7 +1385,8 @@ cfg_parser_create(isc_mem_t *mctx, isc_log_t *lctx, cfg_parser_t **ret)
cleanup:
if (pctx->lexer != NULL)
isc_lex_destroy(&pctx->lexer);
CLEANUP_OBJ(pctx->files);
CLEANUP_OBJ(pctx->open_files);
CLEANUP_OBJ(pctx->closed_files);
isc_mem_put(mctx, pctx, sizeof(*pctx));
return (result);
}
@@ -1395,7 +1407,7 @@ parser_openfile(cfg_parser_t *pctx, const char *filename) {
CHECK(create_string(pctx, filename, &cfg_type_qstring, &stringobj));
CHECK(create_listelt(pctx, &elt));
elt->obj = stringobj;
ISC_LIST_APPEND(pctx->files->value.list, elt, link);
ISC_LIST_APPEND(pctx->open_files->value.list, elt, link);
return (ISC_R_SUCCESS);
cleanup:
@@ -1477,7 +1489,13 @@ void
cfg_parser_destroy(cfg_parser_t **pctxp) {
cfg_parser_t *pctx = *pctxp;
isc_lex_destroy(&pctx->lexer);
CLEANUP_OBJ(pctx->files);
/*
* Cleaning up open_files does not
* close the files; that was already done
* by closing the lexer.
*/
CLEANUP_OBJ(pctx->open_files);
CLEANUP_OBJ(pctx->closed_files);
isc_mem_put(pctx->mctx, pctx, sizeof(*pctx));
*pctxp = NULL;
}
@@ -3466,11 +3484,13 @@ cfg_gettoken(cfg_parser_t *pctx, int options) {
* Closed an included file, not the main file.
*/
cfg_listelt_t *elt;
elt = ISC_LIST_TAIL(pctx->files->value.list);
elt = ISC_LIST_TAIL(pctx->open_files->
value.list);
INSIST(elt != NULL);
ISC_LIST_UNLINK(pctx->files->value.list,
elt, link);
free_list_elt(pctx, elt);
ISC_LIST_UNLINK(pctx->open_files->
value.list, elt, link);
ISC_LIST_APPEND(pctx->closed_files->
value.list, elt, link);
goto redo;
}
pctx->seen_eof = ISC_TRUE;
@@ -3555,9 +3575,9 @@ current_file(cfg_parser_t *pctx) {
cfg_listelt_t *elt;
cfg_obj_t *fileobj;
if (pctx->files == NULL)
if (pctx->open_files == NULL)
return (none);
elt = ISC_LIST_TAIL(pctx->files->value.list);
elt = ISC_LIST_TAIL(pctx->open_files->value.list);
if (elt == NULL)
return (none);