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TLSF mem manager accounting for wrong values
was trying to debug a crash and this popped up.
using a lot of small allocs until pkg_alloc returns NULL (when exhausted)
when NULL is returned the memory used+overhead exceeds the heap allocated.
use frequent small memory allocs until pool is exausted (returns NULL) , check tlsf status.
static void do_test_mem()
{
void* chunk;
tlsf_t pool = NULL;
size_t total = 16 * 1024 * 1024;
size_t half = 8 * 1024 * 1024;
size_t sz = 6;
int x;
void* mem = malloc(total);
char* mem2 = tlsf_cast(char*, tlsf_cast(ptrdiff_t, mem) + half);
memset(mem2, 'X', half);
assert(*mem2 == 'X');
pool = tlsf_create_with_pool(mem, half);
do { chunk = tlsf_malloc(pool, sz); } while(chunk != NULL);
tlsf_status(pool);
for(x=0; x < half; x++) {
assert(*mem2 == 'X');
mem2++;
}
free(mem);
}
heap size= **8388592**
used= **6285144**, used+overhead=**12578696**, free=**18446744073705361512**, fragments=0
max used (+overhead)=12578696, max fragments=1
Free blocks matrix ('.': none, 'X': between 2^X and (2^(X+1)-1) free blocks, X=A..Z, A=0, B=1, ...)
> first-level: 32 block list arrays between 2^fl and 2^(fl+1) bytes (fl=8..39)
v second-level: 32 block lists between 2^fl+sl*2^(fl-5) and 2^fl+(sl+1)*2^(fl-5)-1 bytes (sl=0..31)
0|................................|
1|................................|
2|................................|
3|................................|
4|................................|
5|................................|
6|................................|
7|................................|
8|................................|
9|................................|
10|................................|
11|................................|
12|................................|
13|................................|
14|................................|
15|................................|
16|................................|
17|................................|
18|................................|
19|................................|
20|................................|
21|................................|
22|................................|
23|................................|
24|................................|
25|................................|
26|................................|
27|................................|
28|................................|
29|................................|
30|................................|
31|................................|
identical to reproduce step when calling mem debug on a running instance
* **Kamailio Version** - built from master
CentOS7 and alpine
heap size= 8388592 shouldn't it be 8388608 ?
used+overhead=12578696 misleading
free=18446744073705361512 misleading, looks like it has a negative value
the map doesn't look ok (or i'm not understanding what it should show), its the same output before the alloc and after.
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