a011c4c22d
This fixes an incorrect debug-mode assert: - T1 starts an arena stats update and reads stack_head from another thread's cache bin, when that cache bin has 1 item in it. - T2 allocates from that cache bin. The cache_bin's stack_head now points to a NULL pointer, since the cache bin is empty. - T1 Re-reads the cache_bin's stack_head to perform an assertion check (since it previously saw that the bin was empty, whatever stack_head points to should be non-NULL).
265 lines
9.4 KiB
C
265 lines
9.4 KiB
C
#include "test/jemalloc_test.h"
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static void
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do_fill_test(cache_bin_t *bin, cache_bin_info_t *info, void **ptrs,
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cache_bin_sz_t ncached_max, cache_bin_sz_t nfill_attempt,
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cache_bin_sz_t nfill_succeed) {
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bool success;
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void *ptr;
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assert_true(cache_bin_ncached_get_local(bin, info) == 0, "");
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CACHE_BIN_PTR_ARRAY_DECLARE(arr, nfill_attempt);
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cache_bin_init_ptr_array_for_fill(bin, info, &arr, nfill_attempt);
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for (cache_bin_sz_t i = 0; i < nfill_succeed; i++) {
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arr.ptr[i] = &ptrs[i];
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}
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cache_bin_finish_fill(bin, info, &arr, nfill_succeed);
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expect_true(cache_bin_ncached_get_local(bin, info) == nfill_succeed,
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"");
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cache_bin_low_water_set(bin);
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for (cache_bin_sz_t i = 0; i < nfill_succeed; i++) {
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ptr = cache_bin_alloc(bin, &success);
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expect_true(success, "");
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expect_ptr_eq(ptr, (void *)&ptrs[i],
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"Should pop in order filled");
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expect_true(cache_bin_low_water_get(bin, info)
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== nfill_succeed - i - 1, "");
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}
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expect_true(cache_bin_ncached_get_local(bin, info) == 0, "");
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expect_true(cache_bin_low_water_get(bin, info) == 0, "");
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}
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static void
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do_flush_test(cache_bin_t *bin, cache_bin_info_t *info, void **ptrs,
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cache_bin_sz_t nfill, cache_bin_sz_t nflush) {
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bool success;
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assert_true(cache_bin_ncached_get_local(bin, info) == 0, "");
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for (cache_bin_sz_t i = 0; i < nfill; i++) {
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success = cache_bin_dalloc_easy(bin, &ptrs[i]);
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expect_true(success, "");
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}
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CACHE_BIN_PTR_ARRAY_DECLARE(arr, nflush);
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cache_bin_init_ptr_array_for_flush(bin, info, &arr, nflush);
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for (cache_bin_sz_t i = 0; i < nflush; i++) {
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expect_ptr_eq(cache_bin_ptr_array_get(&arr, i), &ptrs[i], "");
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}
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cache_bin_finish_flush(bin, info, &arr, nflush);
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expect_true(cache_bin_ncached_get_local(bin, info) == nfill - nflush,
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"");
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while (cache_bin_ncached_get_local(bin, info) > 0) {
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cache_bin_alloc(bin, &success);
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}
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}
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static void
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do_batch_alloc_test(cache_bin_t *bin, cache_bin_info_t *info, void **ptrs,
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cache_bin_sz_t nfill, size_t batch) {
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assert_true(cache_bin_ncached_get_local(bin, info) == 0, "");
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CACHE_BIN_PTR_ARRAY_DECLARE(arr, nfill);
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cache_bin_init_ptr_array_for_fill(bin, info, &arr, nfill);
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for (cache_bin_sz_t i = 0; i < nfill; i++) {
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arr.ptr[i] = &ptrs[i];
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}
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cache_bin_finish_fill(bin, info, &arr, nfill);
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assert_true(cache_bin_ncached_get_local(bin, info) == nfill, "");
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cache_bin_low_water_set(bin);
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void **out = malloc((batch + 1) * sizeof(void *));
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size_t n = cache_bin_alloc_batch(bin, batch, out);
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assert_true(n == ((size_t)nfill < batch ? (size_t)nfill : batch), "");
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for (cache_bin_sz_t i = 0; i < (cache_bin_sz_t)n; i++) {
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expect_ptr_eq(out[i], &ptrs[i], "");
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}
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expect_true(cache_bin_low_water_get(bin, info) == nfill -
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(cache_bin_sz_t)n, "");
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while (cache_bin_ncached_get_local(bin, info) > 0) {
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bool success;
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cache_bin_alloc(bin, &success);
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}
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free(out);
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}
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TEST_BEGIN(test_cache_bin) {
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const int ncached_max = 100;
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bool success;
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void *ptr;
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cache_bin_t bin;
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cache_bin_info_t info;
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cache_bin_info_init(&info, ncached_max);
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size_t size;
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size_t alignment;
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cache_bin_info_compute_alloc(&info, 1, &size, &alignment);
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void *mem = mallocx(size, MALLOCX_ALIGN(alignment));
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assert_ptr_not_null(mem, "Unexpected mallocx failure");
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size_t cur_offset = 0;
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cache_bin_preincrement(&info, 1, mem, &cur_offset);
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cache_bin_init(&bin, &info, mem, &cur_offset);
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cache_bin_postincrement(&info, 1, mem, &cur_offset);
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assert_zu_eq(cur_offset, size, "Should use all requested memory");
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/* Initialize to empty; should then have 0 elements. */
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expect_d_eq(ncached_max, cache_bin_info_ncached_max(&info), "");
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expect_true(cache_bin_ncached_get_local(&bin, &info) == 0, "");
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expect_true(cache_bin_low_water_get(&bin, &info) == 0, "");
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ptr = cache_bin_alloc_easy(&bin, &success);
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expect_false(success, "Shouldn't successfully allocate when empty");
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expect_ptr_null(ptr, "Shouldn't get a non-null pointer on failure");
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ptr = cache_bin_alloc(&bin, &success);
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expect_false(success, "Shouldn't successfully allocate when empty");
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expect_ptr_null(ptr, "Shouldn't get a non-null pointer on failure");
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/*
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* We allocate one more item than ncached_max, so we can test cache bin
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* exhaustion.
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*/
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void **ptrs = mallocx(sizeof(void *) * (ncached_max + 1), 0);
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assert_ptr_not_null(ptrs, "Unexpected mallocx failure");
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for (cache_bin_sz_t i = 0; i < ncached_max; i++) {
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expect_true(cache_bin_ncached_get_local(&bin, &info) == i, "");
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success = cache_bin_dalloc_easy(&bin, &ptrs[i]);
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expect_true(success,
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"Should be able to dalloc into a non-full cache bin.");
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expect_true(cache_bin_low_water_get(&bin, &info) == 0,
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"Pushes and pops shouldn't change low water of zero.");
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}
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expect_true(cache_bin_ncached_get_local(&bin, &info) == ncached_max,
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"");
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success = cache_bin_dalloc_easy(&bin, &ptrs[ncached_max]);
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expect_false(success, "Shouldn't be able to dalloc into a full bin.");
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cache_bin_low_water_set(&bin);
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for (cache_bin_sz_t i = 0; i < ncached_max; i++) {
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expect_true(cache_bin_low_water_get(&bin, &info)
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== ncached_max - i, "");
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expect_true(cache_bin_ncached_get_local(&bin, &info)
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== ncached_max - i, "");
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/*
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* This should fail -- the easy variant can't change the low
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* water mark.
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*/
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ptr = cache_bin_alloc_easy(&bin, &success);
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expect_ptr_null(ptr, "");
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expect_false(success, "");
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expect_true(cache_bin_low_water_get(&bin, &info)
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== ncached_max - i, "");
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expect_true(cache_bin_ncached_get_local(&bin, &info)
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== ncached_max - i, "");
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/* This should succeed, though. */
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ptr = cache_bin_alloc(&bin, &success);
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expect_true(success, "");
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expect_ptr_eq(ptr, &ptrs[ncached_max - i - 1],
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"Alloc should pop in stack order");
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expect_true(cache_bin_low_water_get(&bin, &info)
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== ncached_max - i - 1, "");
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expect_true(cache_bin_ncached_get_local(&bin, &info)
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== ncached_max - i - 1, "");
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}
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/* Now we're empty -- all alloc attempts should fail. */
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expect_true(cache_bin_ncached_get_local(&bin, &info) == 0, "");
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ptr = cache_bin_alloc_easy(&bin, &success);
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expect_ptr_null(ptr, "");
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expect_false(success, "");
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ptr = cache_bin_alloc(&bin, &success);
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expect_ptr_null(ptr, "");
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expect_false(success, "");
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for (cache_bin_sz_t i = 0; i < ncached_max / 2; i++) {
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cache_bin_dalloc_easy(&bin, &ptrs[i]);
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}
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cache_bin_low_water_set(&bin);
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for (cache_bin_sz_t i = ncached_max / 2; i < ncached_max; i++) {
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cache_bin_dalloc_easy(&bin, &ptrs[i]);
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}
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expect_true(cache_bin_ncached_get_local(&bin, &info) == ncached_max,
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"");
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for (cache_bin_sz_t i = ncached_max - 1; i >= ncached_max / 2; i--) {
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/*
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* Size is bigger than low water -- the reduced version should
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* succeed.
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*/
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ptr = cache_bin_alloc_easy(&bin, &success);
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expect_true(success, "");
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expect_ptr_eq(ptr, &ptrs[i], "");
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}
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/* But now, we've hit low-water. */
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ptr = cache_bin_alloc_easy(&bin, &success);
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expect_false(success, "");
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expect_ptr_null(ptr, "");
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/* We're going to test filling -- we must be empty to start. */
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while (cache_bin_ncached_get_local(&bin, &info)) {
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cache_bin_alloc(&bin, &success);
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expect_true(success, "");
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}
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/* Test fill. */
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/* Try to fill all, succeed fully. */
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do_fill_test(&bin, &info, ptrs, ncached_max, ncached_max, ncached_max);
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/* Try to fill all, succeed partially. */
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do_fill_test(&bin, &info, ptrs, ncached_max, ncached_max,
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ncached_max / 2);
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/* Try to fill all, fail completely. */
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do_fill_test(&bin, &info, ptrs, ncached_max, ncached_max, 0);
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/* Try to fill some, succeed fully. */
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do_fill_test(&bin, &info, ptrs, ncached_max, ncached_max / 2,
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ncached_max / 2);
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/* Try to fill some, succeed partially. */
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do_fill_test(&bin, &info, ptrs, ncached_max, ncached_max / 2,
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ncached_max / 4);
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/* Try to fill some, fail completely. */
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do_fill_test(&bin, &info, ptrs, ncached_max, ncached_max / 2, 0);
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do_flush_test(&bin, &info, ptrs, ncached_max, ncached_max);
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do_flush_test(&bin, &info, ptrs, ncached_max, ncached_max / 2);
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do_flush_test(&bin, &info, ptrs, ncached_max, 0);
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do_flush_test(&bin, &info, ptrs, ncached_max / 2, ncached_max / 2);
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do_flush_test(&bin, &info, ptrs, ncached_max / 2, ncached_max / 4);
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do_flush_test(&bin, &info, ptrs, ncached_max / 2, 0);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max, ncached_max);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max, ncached_max * 2);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max, ncached_max / 2);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max, 2);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max, 1);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max, 0);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max / 2,
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ncached_max / 2);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max / 2, ncached_max);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max / 2,
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ncached_max / 4);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max / 2, 2);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max / 2, 1);
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do_batch_alloc_test(&bin, &info, ptrs, ncached_max / 2, 0);
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do_batch_alloc_test(&bin, &info, ptrs, 2, ncached_max);
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do_batch_alloc_test(&bin, &info, ptrs, 2, 2);
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do_batch_alloc_test(&bin, &info, ptrs, 2, 1);
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do_batch_alloc_test(&bin, &info, ptrs, 2, 0);
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do_batch_alloc_test(&bin, &info, ptrs, 1, 2);
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do_batch_alloc_test(&bin, &info, ptrs, 1, 1);
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do_batch_alloc_test(&bin, &info, ptrs, 1, 0);
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do_batch_alloc_test(&bin, &info, ptrs, 0, 2);
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do_batch_alloc_test(&bin, &info, ptrs, 0, 1);
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do_batch_alloc_test(&bin, &info, ptrs, 0, 0);
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free(ptrs);
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}
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TEST_END
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int
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main(void) {
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return test(test_cache_bin);
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}
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