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dfa7354873
Test cases conerr/{53,54}.c rely on junk in uninitialized local variables, so ensure that there is some.
Test case function/72.c relies on an object moving, but it might be pinned by an ambiguous reference from the stack, so don't register the stack as a root.
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115 lines
2.5 KiB
C
115 lines
2.5 KiB
C
/*
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TEST_HEADER
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id = $Id$
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summary = request.dylan.170439 (detect bad pointers)
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language = c
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link = testlib.o exfmt.o
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OUTPUT_SPEC
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assert = true
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assertfile P= trace.c
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assertcond = ss->rank < RankEXACT
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END_HEADER
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*/
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#include "testlib.h"
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#include "mpscamc.h"
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#include "exfmt.h"
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void *stackpointer;
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#define genCOUNT (3)
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static mps_gen_param_s testChain[genCOUNT] = {
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{ 6000, 0.90 }, { 8000, 0.65 }, { 16000, 0.50 } };
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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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mps_root_t root;
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mps_chain_t chain;
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mps_fmt_t format;
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mps_ap_t ap;
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mycell *a[3], *bad;
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int i;
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cdie(mps_arena_create(&arena, mps_arena_class_vm(), mmqaArenaSIZE), "create arena");
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/* Clamp the arena so that we can be sure that objects don't move. */
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mps_arena_clamp(arena);
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cdie(mps_root_create_area(&root, arena, mps_rank_exact(), 0, &a[0], &a[3],
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mps_scan_area, NULL), "create area");
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cdie(
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mps_fmt_create_A(&format, arena, &fmtA),
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"create format");
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cdie(mps_chain_create(&chain, arena, genCOUNT, testChain), "chain_create");
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cdie(
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mps_pool_create(&pool, arena, mps_class_amc(), format, chain),
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"create pool");
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cdie(
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mps_ap_create(&ap, pool, mps_rank_exact()),
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"create ap");
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/* Remember the first allocation at a[0] (which is a root) and also
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* at bad (which is not reachable). */
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bad = a[0] = a[1] = allocone(ap, 1, 1);
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for (i = 0; i < 1000; ++i) {
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a[2] = allocone(ap, 1, 1);
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setref(a[2], 0, a[1]);
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a[1] = a[2];
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}
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/* The first collection will cause a[0] to move, but because bad
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* isn't scanned it doesn't get updated, and ends up pointing to
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* oldspace. */
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comment("Collecting...");
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mps_arena_collect(arena);
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asserts(bad != a[0], "Didn't move!");
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/* Write the bad pointer into a scannable part of the heap. The MPS
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* should spot this when it collects. Note that we can't use setref
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* here because we need to bypass the check. */
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comment("Writing bad pointer...");
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a[0]->data.ref[0].addr = bad;
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mps_arena_collect(arena);
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comment("Bad pointer not spotted in collection");
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fail();
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mps_arena_park(arena);
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mps_ap_destroy(ap);
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comment("Destroyed ap.");
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mps_pool_destroy(pool);
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comment("Destroyed pool.");
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mps_fmt_destroy(format);
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comment("Destroyed format.");
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mps_chain_destroy(chain);
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comment("Destroyed chain.");
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mps_root_destroy(root);
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comment("Destroyed root.");
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mps_arena_destroy(arena);
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comment("Destroyed arena.");
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}
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int main(void)
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{
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void *m;
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stackpointer=&m; /* hack to get stack pointer */
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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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