#include <stdbool.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> static size_t size_classes[] = { /* large */ 4 * 1024 * 1024, /* 0 */ 0, /* 16 */ 16, 32, 48, 64, 80, 96, 112, 128, /* 32 */ 160, 192, 224, 256, /* 64 */ 320, 384, 448, 512, /* 128 */ 640, 768, 896, 1024, /* 256 */ 1280, 1536, 1792, 2048, /* 512 */ 2560, 3072, 3584, 4096, /* 1024 */ 5120, 6144, 7168, 8192, /* 2048 */ 10240, 12288, 14336, 16384, #if CONFIG_EXTENDED_SIZE_CLASSES /* 4096 */ 20480, 24576, 28672, 32768, /* 8192 */ 40960, 49152, 57344, 65536, /* 16384 */ 81920, 98304, 114688, 131072, #endif }; #define N_SIZE_CLASSES (sizeof(size_classes) / sizeof(size_classes[0])) static const size_t canary_size = SLAB_CANARY ? sizeof(uint64_t) : 0; int main(void) { for (unsigned i = 2; i < N_SIZE_CLASSES; i++) { size_classes[i] -= canary_size; } void *p[N_SIZE_CLASSES]; for (unsigned i = 0; i < N_SIZE_CLASSES; i++) { size_t size = size_classes[i]; p[i] = malloc(size); if (!p[i]) { return 1; } void *q = malloc(size); if (!q) { return 1; } if (i != 0) { printf("%zu to %zu: %zd\n", size_classes[i - 1], size, p[i] - p[i - 1]); } printf("%zu to %zu: %zd\n", size, size, q - p[i]); } return 0; }