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2002-11-06  Ulrich Drepper  <drepper@redhat.com>

	* posix/regcomp.c (regcomp): __re_compile_fastmap can never fail.
	If re_compile_internal failed free fastmap buffer.
	(free_dfa_content): Broken out of regfree function.  Frees all dfa
	related data.
	(regfree): Add free_dfa_content.
	(re_compile_internal): If any of the called functions fails free
	all dfa related memory.
This commit is contained in:
Ulrich Drepper 2002-11-06 08:34:35 +00:00
parent d97426b7d7
commit 71ccd3308c
2 changed files with 89 additions and 68 deletions
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10
ChangeLog
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@ -1,3 +1,13 @@
2002-11-06 Ulrich Drepper <drepper@redhat.com>
* posix/regcomp.c (regcomp): __re_compile_fastmap can never fail.
If re_compile_internal failed free fastmap buffer.
(free_dfa_content): Broken out of regfree function. Frees all dfa
related data.
(regfree): Add free_dfa_content.
(re_compile_internal): If any of the called functions fails free
all dfa related memory.
2002-11-05 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/sys/sysctl.h: Add ugly hacks to prevent

147
posix/regcomp.c
View File

@ -499,16 +499,14 @@ regcomp (preg, pattern, cflags)
/* We have already checked preg->fastmap != NULL. */
if (BE (ret == REG_NOERROR, 1))
/* Compute the fastmap now, since regexec cannot modify the pattern
buffer. This function nevers fails in this implementation. */
(void) __re_compile_fastmap (preg);
else
{
/* Compute the fastmap now, since regexec cannot modify the pattern
buffer. */
if (BE (re_compile_fastmap (preg) == -2, 0))
{
/* Some error occurred while computing the fastmap, just forget
about it. */
re_free (preg->fastmap);
preg->fastmap = NULL;
}
/* Some error occurred while compiling the expression. */
re_free (preg->fastmap);
preg->fastmap = NULL;
}
return (int) ret;
@ -564,71 +562,80 @@ regerror (errcode, preg, errbuf, errbuf_size)
weak_alias (__regerror, regerror)
#endif
static void
free_dfa_content (re_dfa_t *dfa)
{
int i, j;
re_free (dfa->subexps);
for (i = 0; i < dfa->nodes_len; ++i)
{
re_token_t *node = dfa->nodes + i;
#ifdef RE_ENABLE_I18N
if (node->type == COMPLEX_BRACKET && node->duplicated == 0)
free_charset (node->opr.mbcset);
else
#endif /* RE_ENABLE_I18N */
if (node->type == SIMPLE_BRACKET && node->duplicated == 0)
re_free (node->opr.sbcset);
}
re_free (dfa->nexts);
for (i = 0; i < dfa->nodes_len; ++i)
{
if (dfa->eclosures != NULL)
re_node_set_free (dfa->eclosures + i);
if (dfa->inveclosures != NULL)
re_node_set_free (dfa->inveclosures + i);
if (dfa->edests != NULL)
re_node_set_free (dfa->edests + i);
}
re_free (dfa->edests);
re_free (dfa->eclosures);
re_free (dfa->inveclosures);
re_free (dfa->nodes);
for (i = 0; i <= dfa->state_hash_mask; ++i)
{
struct re_state_table_entry *entry = dfa->state_table + i;
for (j = 0; j < entry->num; ++j)
{
re_dfastate_t *state = entry->array[j];
if (state->entrance_nodes != &state->nodes)
{
re_node_set_free (state->entrance_nodes);
re_free (state->entrance_nodes);
}
re_node_set_free (&state->nodes);
re_free (state->trtable);
re_free (state->trtable_search);
re_free (state);
}
re_free (entry->array);
}
re_free (dfa->state_table);
if (dfa->word_char != NULL)
re_free (dfa->word_char);
#ifdef DEBUG
re_free (dfa->re_str);
#endif
re_free (dfa);
}
/* Free dynamically allocated space used by PREG. */
void
regfree (preg)
regex_t *preg;
{
int i, j;
re_dfa_t *dfa = (re_dfa_t *) preg->buffer;
if (BE (dfa != NULL, 1))
{
re_free (dfa->subexps);
free_dfa_content (dfa);
for (i = 0; i < dfa->nodes_len; ++i)
{
re_token_t *node = dfa->nodes + i;
#ifdef RE_ENABLE_I18N
if (node->type == COMPLEX_BRACKET && node->duplicated == 0)
free_charset (node->opr.mbcset);
else
#endif /* RE_ENABLE_I18N */
if (node->type == SIMPLE_BRACKET && node->duplicated == 0)
re_free (node->opr.sbcset);
}
re_free (dfa->nexts);
for (i = 0; i < dfa->nodes_len; ++i)
{
if (dfa->eclosures != NULL)
re_node_set_free (dfa->eclosures + i);
if (dfa->inveclosures != NULL)
re_node_set_free (dfa->inveclosures + i);
if (dfa->edests != NULL)
re_node_set_free (dfa->edests + i);
}
re_free (dfa->edests);
re_free (dfa->eclosures);
re_free (dfa->inveclosures);
re_free (dfa->nodes);
for (i = 0; i <= dfa->state_hash_mask; ++i)
{
struct re_state_table_entry *entry = dfa->state_table + i;
for (j = 0; j < entry->num; ++j)
{
re_dfastate_t *state = entry->array[j];
if (state->entrance_nodes != &state->nodes)
{
re_node_set_free (state->entrance_nodes);
re_free (state->entrance_nodes);
}
re_node_set_free (&state->nodes);
re_free (state->trtable);
re_free (state->trtable_search);
re_free (state);
}
re_free (entry->array);
}
re_free (dfa->state_table);
if (dfa->word_char != NULL)
re_free (dfa->word_char);
#ifdef DEBUG
re_free (dfa->re_str);
#endif
re_free (dfa);
}
re_free (preg->fastmap);
}
#ifdef _LIBC
@ -778,14 +785,18 @@ re_compile_internal (preg, pattern, length, syntax)
/* Then create the initial state of the dfa. */
err = create_initial_state (dfa);
if (BE (err != REG_NOERROR, 0))
goto re_compile_internal_free_return;
re_compile_internal_free_return:
/* Release work areas. */
free_workarea_compile (preg);
re_string_destruct (&regexp);
if (BE (err != REG_NOERROR, 0))
{
re_compile_internal_free_return:
free_dfa_content (dfa);
preg->buffer = NULL;
}
return err;
}