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#include "test/jemalloc_test.h"
#define BATCH_MAX ((1U << 16) + 1024)
static void *global_ptrs[BATCH_MAX];
#define PAGE_ALIGNED(ptr) (((uintptr_t)ptr & PAGE_MASK) == 0)
static void
verify_batch_basic(tsd_t *tsd, void **ptrs, size_t batch, size_t usize,
bool zero) {
for (size_t i = 0; i < batch; ++i) {
void *p = ptrs[i];
expect_zu_eq(isalloc(tsd_tsdn(tsd), p), usize, "");
if (zero) {
for (size_t k = 0; k < usize; ++k) {
expect_true(*((unsigned char *)p + k) == 0, "");
}
}
}
}
static void
verify_batch_locality(tsd_t *tsd, void **ptrs, size_t batch, size_t usize,
arena_t *arena, unsigned nregs) {
if (config_prof && opt_prof) {
/*
* Checking batch locality when prof is on is feasible but
* complicated, while checking the non-prof case suffices for
* unit-test purpose.
*/
return;
}
for (size_t i = 0, j = 0; i < batch; ++i, ++j) {
if (j == nregs) {
j = 0;
}
if (j == 0 && batch - i < nregs) {
break;
}
void *p = ptrs[i];
expect_ptr_eq(iaalloc(tsd_tsdn(tsd), p), arena, "");
if (j == 0) {
expect_true(PAGE_ALIGNED(p), "");
continue;
}
assert(i > 0);
void *q = ptrs[i - 1];
expect_true((uintptr_t)p > (uintptr_t)q
&& (size_t)((uintptr_t)p - (uintptr_t)q) == usize, "");
}
}
static void
release_batch(void **ptrs, size_t batch, size_t size) {
for (size_t i = 0; i < batch; ++i) {
sdallocx(ptrs[i], size, 0);
}
}
typedef struct batch_alloc_packet_s batch_alloc_packet_t;
struct batch_alloc_packet_s {
void **ptrs;
size_t num;
size_t size;
int flags;
};
static size_t
batch_alloc_wrapper(void **ptrs, size_t num, size_t size, int flags) {
batch_alloc_packet_t batch_alloc_packet = {ptrs, num, size, flags};
size_t filled;
size_t len = sizeof(size_t);
assert_d_eq(mallctl("experimental.batch_alloc", &filled, &len,
&batch_alloc_packet, sizeof(batch_alloc_packet)), 0, "");
return filled;
}
static void
test_wrapper(size_t size, size_t alignment, bool zero, unsigned arena_flag) {
tsd_t *tsd = tsd_fetch();
assert(tsd != NULL);
const size_t usize =
(alignment != 0 ? sz_sa2u(size, alignment) : sz_s2u(size));
const szind_t ind = sz_size2index(usize);
const bin_info_t *bin_info = &bin_infos[ind];
const unsigned nregs = bin_info->nregs;
assert(nregs > 0);
arena_t *arena;
if (arena_flag != 0) {
arena = arena_get(tsd_tsdn(tsd), MALLOCX_ARENA_GET(arena_flag),
false);
} else {
arena = arena_choose(tsd, NULL);
}
assert(arena != NULL);
int flags = arena_flag;
if (alignment != 0) {
flags |= MALLOCX_ALIGN(alignment);
}
if (zero) {
flags |= MALLOCX_ZERO;
}
/*
* Allocate for the purpose of bootstrapping arena_tdata, so that the
* change in bin stats won't contaminate the stats to be verified below.
*/
void *p = mallocx(size, flags | MALLOCX_TCACHE_NONE);
for (size_t i = 0; i < 4; ++i) {
size_t base = 0;
if (i == 1) {
base = nregs;
} else if (i == 2) {
base = nregs * 2;
} else if (i == 3) {
base = (1 << 16);
}
for (int j = -1; j <= 1; ++j) {
if (base == 0 && j == -1) {
continue;
}
size_t batch = base + (size_t)j;
assert(batch < BATCH_MAX);
size_t filled = batch_alloc_wrapper(global_ptrs, batch,
size, flags);
assert_zu_eq(filled, batch, "");
verify_batch_basic(tsd, global_ptrs, batch, usize,
zero);
verify_batch_locality(tsd, global_ptrs, batch, usize,
arena, nregs);
release_batch(global_ptrs, batch, usize);
}
}
free(p);
}
TEST_BEGIN(test_batch_alloc) {
test_wrapper(11, 0, false, 0);
}
TEST_END
TEST_BEGIN(test_batch_alloc_zero) {
test_wrapper(11, 0, true, 0);
}
TEST_END
TEST_BEGIN(test_batch_alloc_aligned) {
test_wrapper(7, 16, false, 0);
}
TEST_END
TEST_BEGIN(test_batch_alloc_manual_arena) {
unsigned arena_ind;
size_t len_unsigned = sizeof(unsigned);
assert_d_eq(mallctl("arenas.create", &arena_ind, &len_unsigned, NULL,
0), 0, "");
test_wrapper(11, 0, false, MALLOCX_ARENA(arena_ind));
}
TEST_END
TEST_BEGIN(test_batch_alloc_large) {
size_t size = SC_LARGE_MINCLASS;
for (size_t batch = 0; batch < 4; ++batch) {
assert(batch < BATCH_MAX);
size_t filled = batch_alloc(global_ptrs, batch, size, 0);
assert_zu_eq(filled, batch, "");
release_batch(global_ptrs, batch, size);
}
size = tcache_maxclass + 1;
for (size_t batch = 0; batch < 4; ++batch) {
assert(batch < BATCH_MAX);
size_t filled = batch_alloc(global_ptrs, batch, size, 0);
assert_zu_eq(filled, batch, "");
release_batch(global_ptrs, batch, size);
}
}
TEST_END
int
main(void) {
return test(
test_batch_alloc,
test_batch_alloc_zero,
test_batch_alloc_aligned,
test_batch_alloc_manual_arena,
test_batch_alloc_large);
}
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