rottenwheel/monero
1
0
Fork 0
mirror of https://codeberg.org/anoncontributorxmr/monero.git synced 2024-11-22 23:42:24 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Fix randomx cache selection for RPCs

Browse source 
Was using the wrong cache slot, and returning invalid PoW hashes to RPC clients
This commit is contained in:
Howard Chu 2019-10-01 02:43:00 -07:00 committed by Howard Chu
parent b60cf6a938
commit 1c600a492f
No known key found for this signature in database
GPG key ID: FD2A70B44AB11BA7
1 changed files with 28 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

36
src/crypto/rx-slow-hash.c
View file

@ -50,7 +50,7 @@
typedef struct rx_state {
CTHR_MUTEX_TYPE rs_mutex;
char rs_hash[32];
char rs_hash[HASH_SIZE];
uint64_t rs_height;
randomx_cache *rs_cache;
} rx_state;
@ -63,7 +63,8 @@ static rx_state rx_s[2] = {{CTHR_MUTEX_INIT,{0},0,0},{CTHR_MUTEX_INIT,{0},0,0}};
static randomx_dataset *rx_dataset;
static uint64_t rx_dataset_height;
static THREADV randomx_vm *rx_vm = NULL;
static THREADV int rx_toggle;
static THREADV int rx_toggle = -1;
static THREADV char rx_seedhash[HASH_SIZE];
static void local_abort(const char *msg)
{
@ -234,21 +235,25 @@ void rx_slow_hash(const uint64_t mainheight, const uint64_t seedheight, const ch
char *hash, int miners, int is_alt) {
uint64_t s_height = rx_seedheight(mainheight);
int changed = 0;
int toggle = is_alt ? s_height : seedheight;
int toggle = (s_height & SEEDHASH_EPOCH_BLOCKS) != 0;
randomx_flags flags = RANDOMX_FLAG_DEFAULT;
rx_state *rx_sp;
randomx_cache *cache;
toggle = (toggle & SEEDHASH_EPOCH_BLOCKS) != 0;
CTHR_MUTEX_LOCK(rx_mutex);
/* if alt block but with same seed as mainchain, no need for alt cache */
if (is_alt && s_height == seedheight && !memcmp(rx_s[toggle].rs_hash, seedhash, sizeof(rx_s[toggle].rs_hash)))
if (is_alt) {
if (s_height == seedheight && !memcmp(rx_s[toggle].rs_hash, seedhash, HASH_SIZE))
is_alt = 0;
} else {
/* RPC could request an earlier block on mainchain */
if (!is_alt && s_height > seedheight)
if (s_height > seedheight)
is_alt = 1;
/* miner can be ahead of mainchain */
else if (s_height < seedheight)
toggle ^= 1;
}
toggle ^= (is_alt != 0);
if (toggle != rx_toggle)
@ -273,13 +278,16 @@ void rx_slow_hash(const uint64_t mainheight, const uint64_t seedheight, const ch
local_abort("Couldn't allocate RandomX cache");
}
}
if (rx_sp->rs_height != seedheight || rx_sp->rs_cache == NULL || memcmp(seedhash, rx_sp->rs_hash, sizeof(rx_sp->rs_hash))) {
randomx_init_cache(cache, seedhash, 32);
if (rx_sp->rs_height != seedheight || rx_sp->rs_cache == NULL || memcmp(seedhash, rx_sp->rs_hash, HASH_SIZE)) {
randomx_init_cache(cache, seedhash, HASH_SIZE);
rx_sp->rs_cache = cache;
rx_sp->rs_height = seedheight;
memcpy(rx_sp->rs_hash, seedhash, sizeof(rx_sp->rs_hash));
memcpy(rx_sp->rs_hash, seedhash, HASH_SIZE);
changed = 1;
}
/* only non-miners use rx_seedhash */
if (!miners && !changed && memcmp(seedhash, rx_seedhash, HASH_SIZE))
changed = 1;
if (rx_vm == NULL) {
randomx_flags flags = RANDOMX_FLAG_DEFAULT;
if (use_rx_jit()) {
@ -307,6 +315,9 @@ void rx_slow_hash(const uint64_t mainheight, const uint64_t seedheight, const ch
mwarning(RX_LOGCAT, "Couldn't allocate RandomX dataset for miner");
}
CTHR_MUTEX_UNLOCK(rx_dataset_mutex);
} else {
/* only non-miners use rx_seedhash */
memcpy(rx_seedhash, seedhash, HASH_SIZE);
}
rx_vm = randomx_create_vm(flags | RANDOMX_FLAG_LARGE_PAGES, rx_sp->rs_cache, rx_dataset);
if(rx_vm == NULL) { //large pages failed
@ -326,6 +337,11 @@ void rx_slow_hash(const uint64_t mainheight, const uint64_t seedheight, const ch
CTHR_MUTEX_UNLOCK(rx_dataset_mutex);
} else if (changed) {
randomx_vm_set_cache(rx_vm, rx_sp->rs_cache);
/* remember the seedhash being used by the current VM. Other threads may set
* rx_sp->rs_cache to the correct value, but we still have to know if the
* current rx_vm has been set to use it or not.
*/
memcpy(rx_seedhash, seedhash, HASH_SIZE);
}
/* mainchain users can run in parallel */
if (!is_alt)