On Thursday, October 3, 2002, at 10:28 AM, Costin Manolache wrote:
>> Command: httpd
>> PID: 853
>>
>> Exception: EXC_BAD_ACCESS (0x0001)
>> Codes: KERN_INVALID_ADDRESS (0x0001) at 0x736f0028
>>
>> Thread 0 Crashed:
>> #0 0x90001600 in strlen
>> #1 0x900023e0 in vfprintf
>> #2 0x90015ee0 in __sbprintf
>> #3 0x900018a8 in vfprintf
>> #4 0x900017ec in fprintf
>> #5 0x0060fdbc in jk2_map_default_get (jk_map.c:97) <-- it's '97'
>> because I added printf
>> #6 0x0060df50 in jk2_env_createBean2 (jk_env.c:218)
>> #7 0x0061ee0c in jk2_create_config (mod_jk2.c:351)
>>
>>
>> Anyone has a clue on what could be wrong? Just pointers would help. I
>> tried following the stack trace but am temporarily thrown off by how
>> jk2_env_createBean2() gets to jk2_map_default_get(), especially the
>> second parameter's type. It seems to be casted from (char *) to
>> (jk_map_t *), which is kind of weird.
>
> Not sure what you mean. The second parameter of env->getBean2( ) is
> string. jk2_env_getBean2 will call jk2_map_default_get ( actually,
> env->_objects->get ) with env->_objects as second param, which is
> a jk_map.
>
I understand now why the stack trace looks weird. The default
configuration adds a '-O2' flag during compilation and Mac OS X GCC 3.1
optimized certain functions out.
Here's the correct stack trace:
Thread 0 Crashed:
#0 0x90001600 in strlen
#1 0x900023e0 in vfprintf
#2 0x900017ec in fprintf
#3 0x0061dd18 in jk2_map_default_get (jk_map.c:104) <- see codes
below for the statement
#4 0x0061bbb4 in jk2_env_getBean2 (jk_env.c:423) <- this was
missing originally
#5 0x0061af40 in jk2_env_createBean2 (jk_env.c:218)
#6 0x00636754 in jk2_create_config (mod_jk2.c:344)
#7 0x0002214c in ap_single_module_configure (config.c:1845)
> Are you using the commented-out printf ? It is possible that
> one of name or value is null - printf is not checking for null on
> many OS. Try using apr printf, or check for null.
>
I'm adding my own printf's. For completeness, here's the function
static void *jk2_map_default_get(jk_env_t *env, jk_map_t *m,
const char *name)
{
int i;
jk_map_private_t *mPriv;
void *result=NULL;
if(name==NULL )
return NULL;
fprintf(stdout, "\nentering for %s ", name);
mPriv=(jk_map_private_t *)m->_private;
fprintf(stdout, " (no. maps: %d)\n", mPriv->size);
for(i = 0 ; i < mPriv->size ; i++) {
fprintf(stdout, "\t%d: ", i);
if ((mPriv->names[i]) == NULL) {
fprintf(stdout, "null mPriv->names[]");
return NULL;
}
fprintf(stdout, " %p ", &(mPriv->names[i]));
fflush(stdout);
fprintf(stdout, " %s ", mPriv->names[i]); /* this is line 104 */
fprintf(stdout, " (%p) \n", mPriv->values[i]);
if(0 == strcmp(mPriv->names[i], name)) {
result = mPriv->values[i];
break;
}
}
fprintf(stdout, "done for %s\n", name);
return result;
}
And as per requested by Costin, I added the printf in the put function:
...
if(mPriv->size < mPriv->capacity) {
mPriv->values[mPriv->size] = value;
/* XXX this is wrong - either we take ownership and copy both
name and value,
or none. The caller should do that if he needs !
Sure, but we should have our copy...
mPriv->names[mPriv->size] = (char *)name;
*/
mPriv->names[mPriv->size] = m->pool->pstrdup(env,m->pool, name);
printf("put '%s' (addr: %p) with value: %p \n",
mPriv->names[mPriv->size], &(mPriv->names[mPriv->size]), value);
mPriv->size ++;
rc = JK_OK;
}
...
And finally, here's the output:
put 'logger.file' (addr: 0x19b948) with value: 0x61d984
put 'logger.win32' (addr: 0x19b94c) with value: 0x61dac8
put 'workerEnv' (addr: 0x19b950) with value: 0x62c698
put 'uriMap' (addr: 0x19b954) with value: 0x62a3d4
put 'uriEnv' (addr: 0x19b958) with value: 0x627fa4
put 'endpoint' (addr: 0x19b95c) with value: 0x61a65c
put 'uri' (addr: 0x19b960) with value: 0x627fa4
put 'config' (addr: 0x19b964) with value: 0x61a028
put 'ajp13' (addr: 0x19b968) with value: 0x62f168
put 'lb' (addr: 0x19b96c) with value: 0x6308dc
put 'status' (addr: 0x19b970) with value: 0x632c2c
put 'run' (addr: 0x19b974) with value: 0x630d60
put 'channel.un' (addr: 0x19b978) with value: 0x617dc8
put 'channel.apr' (addr: 0x19b97c) with value: 0x615644
put 'shm' (addr: 0x19b980) with value: 0x626ee8
put 'channel.socket' (addr: 0x19b984) with value: 0x616c64
put 'handler.response' (addr: 0x19b988) with value: 0x61cff0
put 'handler.logon' (addr: 0x19b98c) with value: 0x61c578
put 'threadMutex' (addr: 0x19b990) with value: 0x620da8
put 'procMutex' (addr: 0x19b994) with value: 0x6209fc
put 'channel.jni' (addr: 0x19b998) with value: 0x6157b0
put 'worker.jni' (addr: 0x19b99c) with value: 0x62f3f4
put 'vm' (addr: 0x19b9a0) with value: 0x62a864
put 'signal' (addr: 0x19b9a4) with value: 0x627038
put 'user' (addr: 0x19b9a8) with value: 0x62a7a8
entering for threadMutex (no. maps: 25)
0: 0x19b948 logger.file (0x61d984)
1: 0x19b94c logger.win32 (0x61dac8)
2: 0x19b950 workerEnv (0x62c698)
3: 0x19b954 uriMap (0x62a3d4)
4: 0x19b958 uriEnv (0x627fa4)
5: 0x19b95c endpoint (0x61a65c)
6: 0x19b960 uri (0x627fa4)
7: 0x19b964 config (0x61a028)
8: 0x19b968 ajp13 (0x62f168)
9: 0x19b96c lb (0x6308dc)
10: 0x19b970 status (0x632c2c)
11: 0x19b974 run (0x630d60)
12: 0x19b978 channel.un (0x617dc8)
13: 0x19b97c channel.apr (0x615644)
14: 0x19b980 shm (0x626ee8)
15: 0x19b984 channel.socket (0x616c64)
16: 0x19b988 handler.response (0x61cff0)
17: 0x19b98c handler.logon (0x61c578)
18: 0x19b990 threadMutex (0x620da8)
done for threadMutex
put 'threadMutex:0' (addr: 0x19eea8) with value: 0x52e080
put 'logger.apache2' (addr: 0x19b9ac) with value: 0x63447c
...
...
entering for workerEnv (no. maps: 19)
0: 0x19eea8 threadMutex:0 (0x52e080)
1: 0x19eeac logger.apache2: (0x532090)
2: 0x19eeb0 logger.apache2 (0x532090)
3: 0x19eeb4 logger (0x532090)
4: 0x19eeb8 uriMap: (0x5360a8)
5: 0x19eebc uriMap (0x5360a8)
6: 0x19eec0 config: (0x5380b8)
7: 0x19eec4 config (0x5380b8)
8: 0x19eec8 shm: (0x53a0c8)
9: 0x19eecc shm (0x53a0c8)
10: 0x19eed0 workerEnv: (0x5340a0)
11: 0x19eed4 workerEnv (0x5340a0)
done for workerEnv
put '/examples/*' (addr: 0x5361cc) with value: 0x55a520
put 'uri:/examples/*' (addr: 0x19eef4) with value: 0x558520
entering for ver (no. maps: 1)
0: 0x19c618 worker (0x19c600)
done for ver
put 'worker' (addr: 0x538b20) with value: 0x538ac8
put 'uri:/examples/*.worker' (addr: 0x53423c) with value: 0x538ac8
entering for uri: (no. maps: 20)
0: 0x19eea8
bin/apachectl: line 87: 3243 Segmentation fault $HTTPD -k $ARGV
It seems like some mem reallocation might be screwing up, no?
Thanks much! Han Ming
