ebd7e99f5c
Validate that small allocations (i.e. those with `size <= SC_SMALL_MAXCLASS`) which are sampled for profiling maintain the expected invariants even though they now take up less space.
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
#include "test/jemalloc_test.h"
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static void assert_small_allocation_sampled(void *ptr, size_t size) {
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assert_ptr_not_null(ptr, "Unexpected malloc failure");
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assert_zu_le(size, SC_SMALL_MAXCLASS, "Unexpected large size class");
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edata_t *edata = emap_edata_lookup(TSDN_NULL, &arena_emap_global, ptr);
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assert_ptr_not_null(edata, "Unable to find edata for allocation");
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expect_false(edata_slab_get(edata),
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"Sampled small allocations should not be placed on slabs");
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expect_ptr_eq(edata_base_get(edata), ptr,
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"Sampled allocations should be page-aligned");
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expect_zu_eq(edata_usize_get(edata), size,
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"Edata usize did not match requested size");
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expect_zu_eq(edata_size_get(edata), PAGE_CEILING(size) + sz_large_pad,
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"Edata actual size was not a multiple of PAGE");
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prof_tctx_t *prof_tctx = edata_prof_tctx_get(edata);
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expect_ptr_not_null(prof_tctx, "Edata had null prof_tctx");
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expect_ptr_not_null(prof_tctx->tdata,
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"Edata had null prof_tdata despite being sampled");
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}
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TEST_BEGIN(test_profile_small_allocations) {
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test_skip_if(!config_prof);
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for (szind_t index = 0; index < SC_NBINS; index++) {
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size_t size = sz_index2size(index);
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void *ptr = malloc(size);
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assert_small_allocation_sampled(ptr, size);
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free(ptr);
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}
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}
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TEST_END
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TEST_BEGIN(test_profile_small_reallocations_growing) {
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test_skip_if(!config_prof);
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void *ptr = NULL;
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for (szind_t index = 0; index < SC_NBINS; index++) {
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size_t size = sz_index2size(index);
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ptr = realloc(ptr, size);
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assert_small_allocation_sampled(ptr, size);
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}
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}
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TEST_END
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TEST_BEGIN(test_profile_small_reallocations_shrinking) {
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test_skip_if(!config_prof);
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void *ptr = NULL;
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for (szind_t index = SC_NBINS; index-- > 0;) {
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size_t size = sz_index2size(index);
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ptr = realloc(ptr, size);
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assert_small_allocation_sampled(ptr, size);
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}
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}
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TEST_END
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TEST_BEGIN(test_profile_small_reallocations_same_size_class) {
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test_skip_if(!config_prof);
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for (szind_t index = 0; index < SC_NBINS; index++) {
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size_t size = sz_index2size(index);
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void *ptr = malloc(size);
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assert_small_allocation_sampled(ptr, size);
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ptr = realloc(ptr, size - 1);
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assert_small_allocation_sampled(ptr, size);
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free(ptr);
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}
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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_profile_small_allocations,
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test_profile_small_reallocations_growing,
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test_profile_small_reallocations_shrinking,
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test_profile_small_reallocations_same_size_class);
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}
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