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123 lines
2.4 KiB
C
123 lines
2.4 KiB
C
/*
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TEST_HEADER
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id = $HopeName$
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summary = regression test for bug when commit fails
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language = c
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link = testlib.o newfmt.o
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END_HEADER
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*/
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/*
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This is a regression test for a bug found by test f12.
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Get a segment with an ambiguous reference to it, and get
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an object X with only exact references to it. Reserve an object Y
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and init it to point to the object X. Then cause collections
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until X gets moved. Reference in Y is out-of-date. Commit Y
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(should fail) and then cause collection, hoping to trick MM
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into scanning Y.
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*/
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#include "testlib.h"
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#include "mpscamc.h"
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#include "newfmt.h"
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void *stackpointer;
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static void test(void)
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{
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mps_space_t space;
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mps_pool_t pool;
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mps_thr_t thread;
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mps_root_t root;
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mps_ap_t apA, apB;
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mps_fmt_t format;
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mycell *ambigref;
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size_t bytes;
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size_t alignment;
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mps_addr_t q;
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int i;
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formatcomments = 1;
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cdie(mps_space_create(&space), "create space");
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cdie(mps_thread_reg(&thread, space), "register thread");
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cdie(
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mps_root_create_reg(&root, space, MPS_RANK_AMBIG, 0, thread,
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mps_stack_scan_ambig, stackpointer, 0),
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"create root");
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cdie(
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mps_fmt_create_A(&format, space, &fmtA),
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"create format");
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cdie(
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mps_pool_create(&pool, space, mps_class_amc(), format),
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"create pool");
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die(mps_ap_create(&apA, pool, MPS_RANK_EXACT), "create apA");
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die(mps_ap_create(&apB, pool, MPS_RANK_EXACT), "create apB");
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bytes = offsetof(struct data, ref)+sizeof(struct refitem);
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alignment = MPS_PF_ALIGN;
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bytes = (bytes+alignment-1)&~(alignment-1);
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die(mps_reserve(&q, apB, bytes), "reserve: ");
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comment("Reserve");
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ambigref = q;
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ambigref->data.tag = MCdata;
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ambigref->data.id = MCerrorid;
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ambigref->data.numrefs = 0;
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ambigref->data.size = bytes;
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comment("Midallocation");
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for(i=0; i<40; i++)
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{
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allocdumb(apA, 1024*256);
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}
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comment("Commit");
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asserts(mps_commit(apB, q, bytes)==0, "Commit succeeded!");
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comment("Postallocation");
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for(i=0; i<40; i++)
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{
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allocdumb(apA, 1024*256);
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}
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comment("Finished");
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mps_ap_destroy(apA);
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mps_ap_destroy(apB);
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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_root_destroy(root);
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comment("Destroyed root.");
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mps_thread_dereg(thread);
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comment("Deregistered thread.");
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mps_space_destroy(space);
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comment("Destroyed space.");
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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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