/* finalcv.c: FINALIZATION COVERAGE TEST * * $Id$ * Copyright (c) 2001-2014 Ravenbrook Limited. See end of file for license. * Portions copyright (C) 2002 Global Graphics Software. * * DESIGN * * See . * * DEPENDENCIES * * This test uses the dylan object format, but the reliance on this * particular format is not great and could be removed. * * NOTES * * This code was created by first copying */ #include "testlib.h" #include "mpslib.h" #include "mps.h" #include "mpscamc.h" #include "mpsavm.h" #include "fmtdy.h" #include "fmtdytst.h" #include "mpstd.h" #include /* printf */ #define testArenaSIZE ((size_t)16<<20) #define rootCOUNT 20 #define churnFACTOR 10 #define finalizationRATE 6 #define gcINTERVAL ((size_t)150 * 1024) #define collectionCOUNT 3 /* 3 words: wrapper | vector-len | first-slot */ #define vectorSIZE (3*sizeof(mps_word_t)) #define vectorSLOT 2 #define genCOUNT 2 /* testChain -- generation parameters for the test */ static mps_gen_param_s testChain[genCOUNT] = { { 150, 0.85 }, { 170, 0.45 } }; /* tags an integer according to dylan format */ static mps_word_t dylan_int(mps_word_t x) { return (x << 2)|1; } /* converts a dylan format int to an int (untags) */ static mps_word_t dylan_int_int(mps_word_t x) { return x >> 2; } /* note: static, so auto-initialised to NULL */ static void *root[rootCOUNT]; /* churn -- allocate a lot of stuff (unreachable garbage, so it will */ /* probably only ever cause a minor collection). */ static void churn(mps_ap_t ap) { int i; mps_addr_t p; mps_res_t e; for (i = 0; i < churnFACTOR; ++i) { do { MPS_RESERVE_BLOCK(e, p, ap, 4096); die(e, "MPS_RESERVE_BLOCK"); die(dylan_init(p, 4096, root, 1), "dylan_init"); } while (!mps_commit(ap, p, 4096)); } p = NULL; } enum { rootSTATE, deadSTATE, finalizableSTATE, finalizedSTATE }; static void *test(void *arg, size_t s) { unsigned i; /* index */ mps_ap_t ap; mps_fmt_t fmt; mps_chain_t chain; mps_pool_t amc; mps_res_t e; mps_root_t mps_root[2]; mps_addr_t nullref = NULL; int state[rootCOUNT]; mps_arena_t arena; void *p = NULL; mps_message_t message; arena = (mps_arena_t)arg; (void)s; die(mps_fmt_create_A(&fmt, arena, dylan_fmt_A()), "fmt_create\n"); die(mps_chain_create(&chain, arena, genCOUNT, testChain), "chain_create"); die(mps_pool_create(&amc, arena, mps_class_amc(), fmt, chain), "pool_create amc\n"); die(mps_root_create_table(&mps_root[0], arena, mps_rank_exact(), (mps_rm_t)0, root, (size_t)rootCOUNT), "root_create\n"); die(mps_root_create_table(&mps_root[1], arena, mps_rank_exact(), (mps_rm_t)0, &p, (size_t)1), "root_create\n"); die(mps_ap_create(&ap, amc, mps_rank_exact()), "ap_create\n"); /* Make registered-for-finalization objects. */ /* */ for(i = 0; i < rootCOUNT; ++i) { do { MPS_RESERVE_BLOCK(e, p, ap, vectorSIZE); die(e, "MPS_RES_OK"); die(dylan_init(p, vectorSIZE, &nullref, 1), "dylan_init"); } while (!mps_commit(ap, p, vectorSIZE)); /* store index in vector's slot */ ((mps_word_t *)p)[vectorSLOT] = dylan_int(i); die(mps_finalize(arena, &p), "finalize\n"); root[i] = p; state[i] = rootSTATE; } p = NULL; mps_message_type_enable(arena, mps_message_type_finalization()); /* */ while (mps_collections(arena) < collectionCOUNT) { /* Perhaps cause (minor) collection */ churn(ap); /* Maybe make some objects ready-to-finalize */ /* */ for (i = 0; i < rootCOUNT; ++i) { if (root[i] != NULL && state[i] == rootSTATE) { if (rnd() % finalizationRATE == 0) { /* for this object, either... */ if (rnd() % 2 == 0) { /* ...definalize it, or */ die(mps_definalize(arena, &root[i]), "definalize\n"); state[i] = deadSTATE; } else { /* ...expect it to be finalized soon */ state[i] = finalizableSTATE; } /* Drop the root reference to it; this makes it */ /* non-E-reachable: so either dead, or ready-to-finalize. */ root[i] = NULL; } } } /* Test any finalized objects, and perhaps resurrect some */ while (mps_message_poll(arena)) { mps_word_t *obj; mps_word_t objind; mps_addr_t objaddr; /* */ cdie(mps_message_get(&message, arena, mps_message_type_finalization()), "get"); cdie(0 == mps_message_clock(arena, message), "message clock should be 0 (unset) for finalization messages"); mps_message_finalization_ref(&objaddr, arena, message); obj = objaddr; objind = dylan_int_int(obj[vectorSLOT]); printf("Finalizing: object %"PRIuLONGEST" at %p\n", (ulongest_t)objind, objaddr); /* */ cdie(root[objind] == NULL, "finalized live"); cdie(state[objind] == finalizableSTATE, "finalized dead"); state[objind] = finalizedSTATE; /* sometimes resurrect */ if (rnd() % 2 == 0) root[objind] = objaddr; mps_message_discard(arena, message); } } /* @@@@ missing */ mps_ap_destroy(ap); mps_root_destroy(mps_root[1]); mps_root_destroy(mps_root[0]); mps_pool_destroy(amc); mps_chain_destroy(chain); mps_fmt_destroy(fmt); return NULL; } int main(int argc, char *argv[]) { mps_arena_t arena; mps_thr_t thread; void *r; testlib_init(argc, argv); die(mps_arena_create(&arena, mps_arena_class_vm(), testArenaSIZE), "arena_create\n"); die(mps_thread_reg(&thread, arena), "thread_reg\n"); mps_tramp(&r, test, arena, 0); mps_thread_dereg(thread); mps_arena_destroy(arena); printf("%s: Conclusion: Failed to find any defects.\n", argv[0]); return 0; } /* C. 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