Mailing-List: contact modules-dev-help@httpd.apache.org; run by ezmlm
Precedence: bulk
Reply-To: modules-dev@httpd.apache.org
Received-SPF: pass (nike.apache.org: local policy)
Message-ID: <4D403D90.6020105@simonecaruso.com>
Date: Wed, 26 Jan 2011 16:28:16 +0100
From: Simone Caruso <info@simonecaruso.com>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US;
 rv:1.9.2.13) Gecko/20101207 Lightning/1.0b2 Thunderbird/3.1.7
MIME-Version: 1.0
To: modules-dev@httpd.apache.org
Subject: I don't understand apr_array_push
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Hi list,

i can't understand the reason i can't read from an "apr array", my code is like this:
	
	//The 2 arrays, now working on reqc->aliases
	reqc->aliases = (apr_array_header_t *)apr_array_make(r->pool, 5, sizeof(alias_t));
         reqc->redirects = (apr_array_header_t *)apr_array_make(r->pool, 5, sizeof(alias_t));

	while (attributes[i]) {
                         if (strcasecmp (attributes[i], "apacheServerName") == 0) {
                                 reqc->name = apr_pstrdup (r->pool, vals[i]);
                         } else if (strcasecmp (attributes[i], "apacheServerAdmin") == 0) {
                                 reqc->admin = apr_pstrdup (r->pool, vals[i]);
                         } else if (strcasecmp (attributes[i], "apacheDocumentRoot") == 0) {
                                 reqc->docroot = apr_pstrdup (r->pool, vals[i]);
                         } else if (strcasecmp (attributes[i], "apacheScriptAlias") == 0) {
                                 cur = strstr(vals[i], " ");
                                 if(cur - vals[i] > 1 ){
                                         tmp = apr_palloc(r->pool, sizeof(char)*strlen(vals[i]));
                                         strcpy(tmp, vals[i]);
                                         tok = NULL;
                                         alias = apr_array_push(reqc->aliases);//HERE THE PUSH
                                         alias->src = apr_strtok((char *)tmp , " ", &tok);
                                         alias->dst = apr_strtok(NULL, " ", &tok);
                                         alias->iscgi = 1;
                                         isalias = 1;
                                 }else{
                                         ap_log_rerror(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, r,
                                                 "[mod_vhost_ldap_ng.c]: Wrong apacheScriptAlias paramter: %s", vals[i]);
                                 }
                         } else if (strcasecmp (attributes[i], "apacheAlias") == 0) {
                                 cur = strstr(vals[i], " ");
                                 if(cur - vals[i] > 1 ){
                                         tmp = apr_palloc(r->pool, sizeof(char)*strlen(vals[i]));
                                         strcpy(tmp, vals[i]);
                                         tok = NULL;
                                         alias = apr_array_push(reqc->aliases); //HERE THE PUSH
                                         alias->src = apr_strtok((char *)vals[i] , " ", &tok);
                                         alias->dst = apr_strtok(NULL, " ", &tok);
                                         alias->iscgi = 0;
                                         isalias = 1;


Now i need to read the array (i read mod_alias.c):
                 for(k = 0; k < reqc->aliases->nelts ; k++){
                         alias = (alias_t *)&reqc->aliases->elts[k];
                         isalias = alias_matches(r->uri, alias->src);
                         if(isalias > 0)
                                 break;
                 }


I don't understand why, when k=2, alias structure is filled with wrong addresses:

(gdb)
658                             isalias = alias_matches(r->uri, alias->src);
(gdb)

Program received signal SIGSEGV, Segmentation fault.
0x00007fc350e6784f in alias_matches (uri=0x94f820 "/",
     alias_fakename=0xda000000000094ff <Address 0xda000000000094ff out of bounds>)


I tried a for like this without success (like mod_alias.c):
for(k = 0; k < reqc->aliases->nelts -1 ; ++k){


Any idea?
thanks!


-- 
Simone Caruso
IT Consultant
+39 349 65 90 805
p.iva: 03045250838