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254 lines
8 KiB
C
254 lines
8 KiB
C
/* fotest.c: FAIL-OVER TEST
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*
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* $Id$
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* Copyright (c) 2001-2014 Ravenbrook Limited. See end of file for license.
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* Portions copyright (C) 2002 Global Graphics Software.
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*
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* This tests fail-over behaviour in low memory situations. The MVFF
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* and MVT pool classes normally maintain their list of free blocks in
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* a Coalescing Block Structure (CBS), but if the CBS cannot handle a
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* request due to running out of memory, they fall back to a Freelist
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* (which has zero memory overhead, at some cost in performance).
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*
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* This is a white box test: it patches the class of the CBS's
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* internal block pool (MFS) with a pointer to a dummy class whose
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* alloc() method always returns ResMEMORY.
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*/
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#include "mpscmvff.h"
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#include "mpscmvt.h"
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#include "mpsavm.h"
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#include "testlib.h"
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#include "cbs.h"
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#include "mpm.h"
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#include "mpmst.h"
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#include "mpmtypes.h"
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#include "poolmfs.h"
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#include <stdio.h> /* printf */
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#define testArenaSIZE ((((size_t)3)<<24) - 4)
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#define testSetSIZE 200
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#define testLOOPS 10
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/* Accessors for the CBS used to implement a pool. */
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extern CBS _mps_mvff_cbs(mps_pool_t);
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extern CBS _mps_mvt_cbs(mps_pool_t);
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/* "OOM" pool class -- dummy alloc/free pool class whose alloc()
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* method always returns ResMEMORY */
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static Res OOMAlloc(Addr *pReturn, Pool pool, Size size,
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Bool withReservoirPermit)
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{
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UNUSED(pReturn);
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UNUSED(pool);
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UNUSED(size);
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UNUSED(withReservoirPermit);
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return ResMEMORY;
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}
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extern PoolClass PoolClassOOM(void);
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DEFINE_POOL_CLASS(OOMPoolClass, this)
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{
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INHERIT_CLASS(this, AbstractAllocFreePoolClass);
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this->alloc = OOMAlloc;
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this->size = sizeof(PoolStruct);
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AVERT(PoolClass, this);
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}
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/* make -- allocate one object */
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static mps_res_t make(mps_addr_t *p, mps_ap_t ap, size_t size)
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{
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mps_res_t res;
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do {
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MPS_RESERVE_BLOCK(res, *p, ap, size);
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if(res != MPS_RES_OK)
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return res;
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} while(!mps_commit(ap, *p, size));
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return MPS_RES_OK;
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}
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/* set_oom -- set blockPool of CBS to OOM or MFS according to argument. */
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static void set_oom(CBS cbs, int oom)
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{
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cbs->blockPool->class = oom ? EnsureOOMPoolClass() : PoolClassMFS();
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}
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/* stress -- create an allocation point and allocate in it */
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static mps_res_t stress(size_t (*size)(unsigned long, mps_align_t),
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mps_align_t alignment, mps_pool_t pool, CBS cbs)
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{
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mps_res_t res = MPS_RES_OK;
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mps_ap_t ap;
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unsigned long i, k;
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int *ps[testSetSIZE];
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size_t ss[testSetSIZE];
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die(mps_ap_create(&ap, pool, mps_rank_exact()), "BufferCreate");
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/* allocate a load of objects */
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for (i=0; i<testSetSIZE; ++i) {
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ss[i] = (*size)(i, alignment);
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res = make((mps_addr_t *)&ps[i], ap, ss[i]);
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if (res != MPS_RES_OK)
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goto allocFail;
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if (ss[i] >= sizeof(ps[i]))
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*ps[i] = 1; /* Write something, so it gets swap. */
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}
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for (k=0; k<testLOOPS; ++k) {
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/* shuffle all the objects */
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for (i=0; i<testSetSIZE; ++i) {
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unsigned long j = rnd()%(testSetSIZE-i);
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void *tp;
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size_t ts;
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tp = ps[j]; ts = ss[j];
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ps[j] = ps[i]; ss[j] = ss[i];
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ps[i] = tp; ss[i] = ts;
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}
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/* free half of the objects */
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/* upper half, as when allocating them again we want smaller objects */
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/* see randomSize() */
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for (i=testSetSIZE/2; i<testSetSIZE; ++i) {
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mps_free(pool, (mps_addr_t)ps[i], ss[i]);
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/* if (i == testSetSIZE/2) */
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/* PoolDescribe((Pool)pool, mps_lib_stdout); */
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}
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/* allocate some new objects */
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for (i=testSetSIZE/2; i<testSetSIZE; ++i) {
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ss[i] = (*size)(i, alignment);
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res = make((mps_addr_t *)&ps[i], ap, ss[i]);
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if (res != MPS_RES_OK)
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goto allocFail;
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}
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set_oom(cbs, rnd() % 2);
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}
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set_oom(cbs, 0);
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allocFail:
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mps_ap_destroy(ap);
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return res;
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}
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/* randomSizeAligned -- produce sizes both large and small,
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* aligned by platform alignment */
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static size_t randomSizeAligned(unsigned long i, mps_align_t alignment)
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{
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size_t maxSize = 2 * 160 * 0x2000;
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/* Reduce by a factor of 2 every 10 cycles. Total allocation about 40 MB. */
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return alignUp(rnd() % max((maxSize >> (i / 10)), 2) + 1, alignment);
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}
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int main(int argc, char *argv[])
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{
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mps_arena_t arena;
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mps_pool_t pool;
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mps_align_t alignment;
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testlib_init(argc, argv);
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die(mps_arena_create(&arena, mps_arena_class_vm(), testArenaSIZE),
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"mps_arena_create");
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alignment = (1 << (rnd() % 4)) * MPS_PF_ALIGN;
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MPS_ARGS_BEGIN(args) {
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MPS_ARGS_ADD(args, MPS_KEY_EXTEND_BY, (64 + rnd() % 64) * 1024);
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MPS_ARGS_ADD(args, MPS_KEY_MEAN_SIZE, (1 + rnd() % 8) * 8);
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MPS_ARGS_ADD(args, MPS_KEY_ALIGN, alignment);
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MPS_ARGS_ADD(args, MPS_KEY_MVFF_ARENA_HIGH, rnd() % 2);
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MPS_ARGS_ADD(args, MPS_KEY_MVFF_SLOT_HIGH, rnd() % 2);
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MPS_ARGS_ADD(args, MPS_KEY_MVFF_FIRST_FIT, rnd() % 2);
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die(mps_pool_create_k(&pool, arena, mps_class_mvff(), args), "create MVFF");
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} MPS_ARGS_END(args);
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{
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CBS cbs = _mps_mvff_cbs(pool);
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die(stress(randomSizeAligned, alignment, pool, cbs), "stress MVFF");
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}
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mps_pool_destroy(pool);
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mps_arena_destroy(arena);
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die(mps_arena_create(&arena, mps_arena_class_vm(), testArenaSIZE),
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"mps_arena_create");
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alignment = (1 << (rnd() % 4)) * MPS_PF_ALIGN;
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MPS_ARGS_BEGIN(args) {
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MPS_ARGS_ADD(args, MPS_KEY_ALIGN, alignment);
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MPS_ARGS_ADD(args, MPS_KEY_MIN_SIZE, (1 + rnd() % 4) * 4);
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MPS_ARGS_ADD(args, MPS_KEY_MEAN_SIZE, (1 + rnd() % 8) * 16);
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MPS_ARGS_ADD(args, MPS_KEY_MAX_SIZE, (1 + rnd() % 4) * 1024);
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MPS_ARGS_ADD(args, MPS_KEY_MVT_RESERVE_DEPTH, (1 + rnd() % 64) * 16);
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MPS_ARGS_ADD(args, MPS_KEY_MVT_FRAG_LIMIT, (rnd() % 101) / 100.0);
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die(mps_pool_create_k(&pool, arena, mps_class_mvt(), args), "create MVFF");
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} MPS_ARGS_END(args);
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{
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CBS cbs = _mps_mvt_cbs(pool);
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die(stress(randomSizeAligned, alignment, pool, cbs), "stress MVT");
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}
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mps_pool_destroy(pool);
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mps_arena_destroy(arena);
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printf("%s: Conclusion: Failed to find any defects.\n", argv[0]);
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return 0;
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}
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (c) 2001-2014 Ravenbrook Limited <http://www.ravenbrook.com/>.
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* All rights reserved. This is an open source license. Contact
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* Ravenbrook for commercial licensing options.
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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 are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Redistributions in any form must be accompanied by information on how
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* to obtain complete source code for this software and any accompanying
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* software that uses this software. The source code must either be
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* included in the distribution or be available for no more than the cost
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* of distribution plus a nominal fee, and must be freely redistributable
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* under reasonable conditions. For an executable file, complete source
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* code means the source code for all modules it contains. It does not
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* include source code for modules or files that typically accompany the
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* major components of the operating system on which the executable file
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* runs.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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* PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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