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- To: vim-dev@vim.org
- Subject: patch 7.0.183
- Fcc: outbox
- From: Bram Moolenaar <Bram@moolenaar.net>
- Mime-Version: 1.0
- Content-Type: text/plain; charset=ISO-8859-1
- Content-Transfer-Encoding: 8bit
- ------------
-
- Patch 7.0.183
- Problem: Crash in ":let" when redirecting to a variable that's being
- displayed. (Thomas Link)
- Solution: When redirecting to a variable only do the assignment when
- stopping redirection to avoid that setting the variable causes a
- freed string to be accessed.
- Files: src/eval.c
-
-
- *** ../vim-7.0.182/src/eval.c Tue Dec 5 10:33:57 2006
- --- src/eval.c Sun Jan 14 14:20:49 2007
- ***************
- *** 898,903 ****
- --- 898,904 ----
- }
-
- static lval_T *redir_lval = NULL;
- + static garray_T redir_ga; /* only valid when redir_lval is not NULL */
- static char_u *redir_endp = NULL;
- static char_u *redir_varname = NULL;
-
- ***************
- *** 932,937 ****
- --- 933,941 ----
- return FAIL;
- }
-
- + /* The output is stored in growarray "redir_ga" until redirection ends. */
- + ga_init2(&redir_ga, (int)sizeof(char), 500);
- +
- /* Parse the variable name (can be a dict or list entry). */
- redir_endp = get_lval(redir_varname, NULL, redir_lval, FALSE, FALSE, FALSE,
- FNE_CHECK_START);
- ***************
- *** 974,1015 ****
- }
-
- /*
- ! * Append "value[len]" to the variable set by var_redir_start().
- */
- void
- ! var_redir_str(value, len)
- char_u *value;
- ! int len;
- {
- ! char_u *val;
- ! typval_T tv;
- ! int save_emsg;
- ! int err;
-
- if (redir_lval == NULL)
- return;
-
- ! if (len == -1)
- ! /* Append the entire string */
- ! val = vim_strsave(value);
- ! else
- ! /* Append only the specified number of characters */
- ! val = vim_strnsave(value, len);
- ! if (val == NULL)
- ! return;
- !
- ! tv.v_type = VAR_STRING;
- ! tv.vval.v_string = val;
-
- ! save_emsg = did_emsg;
- ! did_emsg = FALSE;
- ! set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
- ! err = did_emsg;
- ! did_emsg |= save_emsg;
- ! if (err)
- var_redir_stop();
- -
- - vim_free(tv.vval.v_string);
- }
-
- /*
- --- 978,1013 ----
- }
-
- /*
- ! * Append "value[value_len]" to the variable set by var_redir_start().
- ! * The actual appending is postponed until redirection ends, because the value
- ! * appended may in fact be the string we write to, changing it may cause freed
- ! * memory to be used:
- ! * :redir => foo
- ! * :let foo
- ! * :redir END
- */
- void
- ! var_redir_str(value, value_len)
- char_u *value;
- ! int value_len;
- {
- ! size_t len;
-
- if (redir_lval == NULL)
- return;
-
- ! if (value_len == -1)
- ! len = STRLEN(value); /* Append the entire string */
- ! else
- ! len = value_len; /* Append only "value_len" characters */
-
- ! if (ga_grow(&redir_ga, (int)len) == OK)
- ! {
- ! mch_memmove((char *)redir_ga.ga_data + redir_ga.ga_len, value, len);
- ! redir_ga.ga_len += len;
- ! }
- ! else
- var_redir_stop();
- }
-
- /*
- ***************
- *** 1018,1025 ****
- --- 1016,1034 ----
- void
- var_redir_stop()
- {
- + typval_T tv;
- +
- if (redir_lval != NULL)
- {
- + /* Append the trailing NUL. */
- + ga_append(&redir_ga, NUL);
- +
- + /* Assign the text to the variable. */
- + tv.v_type = VAR_STRING;
- + tv.vval.v_string = redir_ga.ga_data;
- + set_var_lval(redir_lval, redir_endp, &tv, FALSE, (char_u *)".");
- + vim_free(tv.vval.v_string);
- +
- clear_lval(redir_lval);
- vim_free(redir_lval);
- redir_lval = NULL;
- *** ../vim-7.0.182/src/version.c Tue Jan 9 20:29:55 2007
- --- src/version.c Sun Jan 14 15:23:23 2007
- ***************
- *** 668,669 ****
- --- 668,671 ----
- { /* Add new patch number below this line */
- + /**/
- + 183,
- /**/
-
- --
- How To Keep A Healthy Level Of Insanity:
- 16. Have your coworkers address you by your wrestling name, Rock Hard Kim.
-
- /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
- /// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
- \\\ download, build and distribute -- http://www.A-A-P.org ///
- \\\ help me help AIDS victims -- http://ICCF-Holland.org ///
-