| 419 | } |
| 420 | |
| 421 | arena_tdata_t * |
| 422 | arena_tdata_get_hard(tsd_t *tsd, unsigned ind) { |
| 423 | arena_tdata_t *tdata, *arenas_tdata_old; |
| 424 | arena_tdata_t *arenas_tdata = tsd_arenas_tdata_get(tsd); |
| 425 | unsigned narenas_tdata_old, i; |
| 426 | unsigned narenas_tdata = tsd_narenas_tdata_get(tsd); |
| 427 | unsigned narenas_actual = narenas_total_get(); |
| 428 | |
| 429 | /* |
| 430 | * Dissociate old tdata array (and set up for deallocation upon return) |
| 431 | * if it's too small. |
| 432 | */ |
| 433 | if (arenas_tdata != NULL && narenas_tdata < narenas_actual) { |
| 434 | arenas_tdata_old = arenas_tdata; |
| 435 | narenas_tdata_old = narenas_tdata; |
| 436 | arenas_tdata = NULL; |
| 437 | narenas_tdata = 0; |
| 438 | tsd_arenas_tdata_set(tsd, arenas_tdata); |
| 439 | tsd_narenas_tdata_set(tsd, narenas_tdata); |
| 440 | } else { |
| 441 | arenas_tdata_old = NULL; |
| 442 | narenas_tdata_old = 0; |
| 443 | } |
| 444 | |
| 445 | /* Allocate tdata array if it's missing. */ |
| 446 | if (arenas_tdata == NULL) { |
| 447 | bool *arenas_tdata_bypassp = tsd_arenas_tdata_bypassp_get(tsd); |
| 448 | narenas_tdata = (ind < narenas_actual) ? narenas_actual : ind+1; |
| 449 | |
| 450 | if (tsd_nominal(tsd) && !*arenas_tdata_bypassp) { |
| 451 | *arenas_tdata_bypassp = true; |
| 452 | arenas_tdata = (arena_tdata_t *)a0malloc( |
| 453 | sizeof(arena_tdata_t) * narenas_tdata); |
| 454 | *arenas_tdata_bypassp = false; |
| 455 | } |
| 456 | if (arenas_tdata == NULL) { |
| 457 | tdata = NULL; |
| 458 | goto label_return; |
| 459 | } |
| 460 | assert(tsd_nominal(tsd) && !*arenas_tdata_bypassp); |
| 461 | tsd_arenas_tdata_set(tsd, arenas_tdata); |
| 462 | tsd_narenas_tdata_set(tsd, narenas_tdata); |
| 463 | } |
| 464 | |
| 465 | /* |
| 466 | * Copy to tdata array. It's possible that the actual number of arenas |
| 467 | * has increased since narenas_total_get() was called above, but that |
| 468 | * causes no correctness issues unless two threads concurrently execute |
| 469 | * the arenas.create mallctl, which we trust mallctl synchronization to |
| 470 | * prevent. |
| 471 | */ |
| 472 | |
| 473 | /* Copy/initialize tickers. */ |
| 474 | for (i = 0; i < narenas_actual; i++) { |
| 475 | if (i < narenas_tdata_old) { |
| 476 | ticker_copy(&arenas_tdata[i].decay_ticker, |
| 477 | &arenas_tdata_old[i].decay_ticker); |
| 478 | } else { |
no test coverage detected