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vim-patch:8.2.0908: crash when changing the function table while listing it

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Problem:    Crash when changing the function table while listing it.
Solution:   Bail out when the function table changes. (closes vim/vim#6209)

3fffa97159

Co-authored-by: Bram Moolenaar <Bram@vim.org>
This commit is contained in:
zeertzjq
2022-10-24 13:48:51 +08:00
parent 29fe3348ba
commit c5f280c522
2 changed files with 57 additions and 26 deletions
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58
src/nvim/eval/userfunc.c
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@@ -1877,6 +1877,36 @@ theend:
#define MAX_FUNC_NESTING 50
/// List functions.
///
/// @param regmatch When NULL, all of them.
/// Otherwise functions matching "regmatch".
static void list_functions(regmatch_T *regmatch)
{
const size_t used = func_hashtab.ht_used;
size_t todo = used;
const hashitem_T *const ht_array = func_hashtab.ht_array;
for (const hashitem_T *hi = ht_array; todo > 0 && !got_int; hi++) {
if (!HASHITEM_EMPTY(hi)) {
ufunc_T *fp = HI2UF(hi);
todo--;
if ((fp->uf_flags & FC_DEAD) == 0
&& (regmatch == NULL
? (!message_filtered((char *)fp->uf_name)
&& !func_name_refcount(fp->uf_name))
: (!isdigit(*fp->uf_name)
&& vim_regexec(regmatch, (char *)fp->uf_name, 0)))) {
list_func_head(fp, false, false);
if (used != func_hashtab.ht_used || ht_array != func_hashtab.ht_array) {
emsg(_("E454: function list was modified"));
return;
}
}
}
}
}
/// ":function"
void ex_function(exarg_T *eap)
{
@@ -1903,7 +1933,6 @@ void ex_function(exarg_T *eap)
static int func_nr = 0; // number for nameless function
int paren;
hashtab_T *ht;
int todo;
hashitem_T *hi;
linenr_T sourcing_lnum_off;
linenr_T sourcing_lnum_top;
@@ -1916,19 +1945,7 @@ void ex_function(exarg_T *eap)
// ":function" without argument: list functions.
if (ends_excmd(*eap->arg)) {
if (!eap->skip) {
todo = (int)func_hashtab.ht_used;
for (hi = func_hashtab.ht_array; todo > 0 && !got_int; hi++) {
if (!HASHITEM_EMPTY(hi)) {
todo--;
fp = HI2UF(hi);
if (message_filtered((char *)fp->uf_name)) {
continue;
}
if (!func_name_refcount(fp->uf_name)) {
list_func_head(fp, false, false);
}
}
}
list_functions(NULL);
}
eap->nextcmd = check_nextcmd(eap->arg);
return;
@@ -1946,18 +1963,7 @@ void ex_function(exarg_T *eap)
*p = c;
if (regmatch.regprog != NULL) {
regmatch.rm_ic = p_ic;
todo = (int)func_hashtab.ht_used;
for (hi = func_hashtab.ht_array; todo > 0 && !got_int; hi++) {
if (!HASHITEM_EMPTY(hi)) {
todo--;
fp = HI2UF(hi);
if (!isdigit(*fp->uf_name)
&& vim_regexec(&regmatch, (char *)fp->uf_name, 0)) {
list_func_head(fp, false, false);
}
}
}
list_functions(&regmatch);
vim_regfree(regmatch.regprog);
}
}