mem-leak freeing g_strdup
- by Mike
I'm trying to free g_strdup but I'm not sure what I'm doing wrong.
Using valgrind --tool=memcheck --leak-check=yes ./a.out I keep getting:
==4506== 40 bytes in 10 blocks are definitely lost in loss record 2 of 9
==4506== at 0x4024C1C: malloc (vg_replace_malloc.c:195)
==4506== by 0x40782E3: g_malloc (in /lib/libglib-2.0.so.0.2200.3)
==4506== by 0x4090CA8: g_strdup (in /lib/libglib-2.0.so.0.2200.3)
==4506== by 0x8048722: add_inv (dup.c:26)
==4506== by 0x80487E6: main (dup.c:47)
==4506== 504 bytes in 1 blocks are possibly lost in loss record 4 of 9
==4506== at 0x4023E2E: memalign (vg_replace_malloc.c:532)
==4506== by 0x4023E8B: posix_memalign (vg_replace_malloc.c:660)
==4506== by 0x408D61D: ??? (in /lib/libglib-2.0.so.0.2200.3)
==4506== by 0x408E5AC: g_slice_alloc (in /lib/libglib-2.0.so.0.2200.3)
==4506== by 0x4061628: g_hash_table_new_full (in /lib/libglib-2.0.so.0.2200.3)
==4506== by 0x40616C7: g_hash_table_new (in /lib/libglib-2.0.so.0.2200.3)
==4506== by 0x8048795: main (dup.c:42)
I've tried different ways to freed but no success so far. I'll appreciate any help. Thanks
BTW: It compiles and runs fine.
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <glib.h>
#include <stdint.h>
struct s {
char *data;
};
static GHashTable *hashtable1;
static GHashTable *hashtable2;
static void add_inv(GHashTable *table, const char *key)
{
gpointer old_value, old_key;
gint value;
if(g_hash_table_lookup_extended(table,key, &old_key, &old_value)){
value = GPOINTER_TO_INT(old_value);
value = value + 2;
/*g_free (old_key);*/
} else {
value = 5;
}
g_hash_table_replace(table, g_strdup(key), GINT_TO_POINTER(value));
}
static void print_hash_kv (gpointer key, gpointer value, gpointer user_data){
gchar *k = (gchar *) key;
gchar *h = (gchar *) value;
printf("%s: %d \n",k, h);
}
int main(int argc, char *argv[]){
struct s t;
t.data = "bar";
int i,j;
hashtable1 = g_hash_table_new(g_str_hash, g_str_equal);
hashtable2 = g_hash_table_new(g_str_hash, g_str_equal);
for(i=0;i<10;i++){
add_inv(hashtable1, t.data);
add_inv(hashtable2, t.data);
}
/*free(t.data);*/
/*free(t.data);*/
g_hash_table_foreach (hashtable1, print_hash_kv, NULL);
g_hash_table_foreach (hashtable2, print_hash_kv, NULL);
g_hash_table_destroy(hashtable1);
g_hash_table_destroy(hashtable2);
return 0;
}
