245 lines
6.6 KiB
C
245 lines
6.6 KiB
C
/*
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* testcode/unitregional.c - unit test for regional allocator.
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*
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* Copyright (c) 2010, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**
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* \file
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* Tests the regional special purpose allocator.
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*/
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#include "config.h"
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#include "testcode/unitmain.h"
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#include "util/log.h"
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#include "util/regional.h"
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/** test regional corner cases, zero, one, end of structure */
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static void
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corner_cases(struct regional* r)
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{
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size_t s; /* shadow count of allocated memory */
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void* a;
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size_t minsize = sizeof(uint64_t);
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size_t mysize;
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char* str;
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unit_assert(r);
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/* alloc cases:
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* 0, 1, 2.
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* smaller than LARGE_OBJECT_SIZE.
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* smaller but does not fit in remainder in regional.
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* smaller but exactly fits in remainder of regional.
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* size is remainder of regional - 8.
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* size is remainder of regional + 8.
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* larger than LARGE_OBJECT_SIZE.
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*/
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s = sizeof(struct regional);
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unit_assert((s % minsize) == 0);
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unit_assert(r->available == r->first_size - s);
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unit_assert(r->large_list == NULL);
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unit_assert(r->next == NULL);
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/* Note an alloc of 0 gets a pointer to current last
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* position (where you should then use 0 bytes) */
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a = regional_alloc(r, 0);
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unit_assert(a);
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s+=0;
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unit_assert(r->available == r->first_size - s);
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a = regional_alloc(r, 1);
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unit_assert(a);
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memset(a, 0x42, 1);
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s+=minsize;
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unit_assert(r->available == r->first_size - s);
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a = regional_alloc(r, 2);
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unit_assert(a);
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memset(a, 0x42, 2);
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s+=minsize;
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unit_assert(r->available == r->first_size - s);
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a = regional_alloc(r, 128);
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unit_assert(a);
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memset(a, 0x42, 128);
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s+=128;
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unit_assert(r->available == r->first_size - s);
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unit_assert(r->large_list == NULL);
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a = regional_alloc(r, 10240);
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unit_assert(a);
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unit_assert(r->large_list != NULL);
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memset(a, 0x42, 10240);
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/* s does not change */
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unit_assert(r->available == r->first_size - s);
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unit_assert(r->total_large == 10240+minsize);
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/* go towards the end of the current chunk */
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while(r->available > 1024) {
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a = regional_alloc(r, 1024);
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unit_assert(a);
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memset(a, 0x42, 1024);
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s += 1024;
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unit_assert(r->available == r->first_size - s);
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}
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unit_assert(r->next == NULL);
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mysize = 1280; /* does not fit in current chunk */
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a = regional_alloc(r, mysize);
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memset(a, 0x42, mysize);
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unit_assert(r->next != NULL);
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unit_assert(a);
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/* go towards the end of the current chunk */
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while(r->available > 864) {
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a = regional_alloc(r, 864);
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unit_assert(a);
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memset(a, 0x42, 864);
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s += 864;
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}
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mysize = r->available; /* exactly fits */
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a = regional_alloc(r, mysize);
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memset(a, 0x42, mysize);
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unit_assert(a);
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unit_assert(r->available == 0); /* implementation does not go ahead*/
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a = regional_alloc(r, 8192); /* another large allocation */
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unit_assert(a);
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memset(a, 0x42, 8192);
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unit_assert(r->available == 0);
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unit_assert(r->total_large == 10240 + 8192 + 2*minsize);
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a = regional_alloc(r, 32); /* make new chunk */
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unit_assert(a);
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memset(a, 0x42, 32);
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unit_assert(r->available > 0);
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unit_assert(r->total_large == 10240 + 8192 + 2*minsize);
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/* go towards the end of the current chunk */
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while(r->available > 1320) {
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a = regional_alloc(r, 1320);
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unit_assert(a);
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memset(a, 0x42, 1320);
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s += 1320;
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}
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mysize = r->available + 8; /* exact + 8 ; does not fit */
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a = regional_alloc(r, mysize);
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memset(a, 0x42, mysize);
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unit_assert(a);
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unit_assert(r->available > 0); /* new chunk */
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/* go towards the end of the current chunk */
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while(r->available > 1480) {
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a = regional_alloc(r, 1480);
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unit_assert(a);
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memset(a, 0x42, 1480);
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s += 1480;
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}
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mysize = r->available - 8; /* exact - 8 ; fits. */
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a = regional_alloc(r, mysize);
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memset(a, 0x42, mysize);
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unit_assert(a);
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unit_assert(r->available == 8);
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/* test if really copied over */
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str = "test12345";
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a = regional_alloc_init(r, str, 8);
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unit_assert(a);
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unit_assert(memcmp(a, str, 8) == 0);
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/* test if really zeroed */
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a = regional_alloc_zero(r, 32);
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str="\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
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unit_assert(a);
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unit_assert(memcmp(a, str, 32) == 0);
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/* test if copied over (and null byte) */
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str = "an interesting string";
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a = regional_strdup(r, str);
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unit_assert(a);
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unit_assert(memcmp(a, str, strlen(str)+1) == 0);
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regional_free_all(r);
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}
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/** test specific cases */
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static void
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specific_cases(void)
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{
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struct regional* r = regional_create();
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corner_cases(r);
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regional_destroy(r);
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r = regional_create_custom(2048); /* a small regional */
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unit_assert(r->first_size == 2048);
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unit_assert(regional_get_mem(r) == 2048);
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corner_cases(r);
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unit_assert(regional_get_mem(r) == 2048);
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regional_destroy(r);
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}
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/** put random stuff in a region and free it */
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static void
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burden_test(size_t max)
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{
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size_t get;
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void* a;
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int i;
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struct regional* r = regional_create_custom(2048);
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for(i=0; i<1000; i++) {
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get = random() % max;
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a = regional_alloc(r, get);
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unit_assert(a);
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memset(a, 0x54, get);
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}
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regional_free_all(r);
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regional_destroy(r);
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}
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/** randomly allocate stuff */
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static void
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random_burden(void)
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{
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size_t max_alloc = 2048 + 128; /* small chance of LARGE */
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int i;
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for(i=0; i<100; i++)
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burden_test(max_alloc);
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}
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void regional_test(void)
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{
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unit_show_feature("regional");
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specific_cases();
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random_burden();
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}
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