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76 lines
2 KiB
C
76 lines
2 KiB
C
/*
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TEST_HEADER
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id = $Id$
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summary = regression test for job004102
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language = c
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link = testlib.o
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parameters = GRAINSIZE=4096
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END_HEADER
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*/
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#include "mpsavm.h"
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#include "mpscmvff.h"
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#include "testlib.h"
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static void test(void)
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{
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mps_arena_t arena;
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mps_pool_t pool;
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void *addr[GRAINSIZE];
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size_t i;
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MPS_ARGS_BEGIN(args) {
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MPS_ARGS_ADD(args, MPS_KEY_ARENA_GRAIN_SIZE, GRAINSIZE);
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MPS_ARGS_ADD(args, MPS_KEY_SPARE, 0.0);
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cdie(mps_arena_create_k(&arena, mps_arena_class_vm(), args),
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"create arena");
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} MPS_ARGS_END(args);
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MPS_ARGS_BEGIN(args) {
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MPS_ARGS_ADD(args, MPS_KEY_EXTEND_BY, GRAINSIZE);
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MPS_ARGS_ADD(args, MPS_KEY_SPARE, 0.0);
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cdie(mps_pool_create_k(&pool, arena, mps_class_mvff(), args),
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"create pool");
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} MPS_ARGS_END(args);
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/* Allocate objects, each consisting of one arena grain. */
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for (i = 0; i < GRAINSIZE; ++i) {
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die(mps_alloc(&addr[i], pool, GRAINSIZE), "alloc");
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}
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/* 1. The MVFF pool was configured to keep no spare memory, so the
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freed memory will be returned to the arena immediately and added
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to the free land.
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2. We are freeing every other object, and so each object is an
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isolated continguous free range and so requires an additional CBS
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block.
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3. Eventually the free land's block pool runs out of memory and
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requires extending.
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4. The arena was configured to have no spare committed memory,
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and no additional memory can be mapped, because the commit limit
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is set to the committed memory. This means that the arena will
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have to "steal" a grain from the freed memory to extend the block
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pool.
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5. The freed memory consists of a single grain, so after stealing
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a grain there is nothing left to add to the free land. This is
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the case we are testing. */
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for (i = 0; i < GRAINSIZE; i += 2) {
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mps_arena_commit_limit_set(arena, mps_arena_committed(arena));
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mps_free(pool, addr[i], GRAINSIZE);
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}
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mps_pool_destroy(pool);
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mps_arena_destroy(arena);
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}
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int main(void)
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{
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easy_tramp(test);
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pass();
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return 0;
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}
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