コード例 #1
0
void
MR_mkframe_msg(FILE *fp, const char *predname)
{
    MR_restore_transient_registers();

    if (!MR_lld_print_enabled) {
        return;
    }

    fprintf(fp, "\nnew choice point for procedure %s\n", predname);
    fprintf(fp, "new  fr: ");
    MR_printnondetstack(fp, MR_curfr);
    fprintf(fp, "\nprev fr: ");
    MR_printnondetstack(fp, MR_prevfr_slot(MR_curfr));
    fprintf(fp, "\nsucc fr: ");
    MR_printnondetstack(fp, MR_succfr_slot(MR_curfr));
    fprintf(fp, "\nsucc ip: ");
    MR_printlabel(fp, MR_succip_slot(MR_curfr));
    fprintf(fp, "redo fr: ");
    MR_printnondetstack(fp, MR_redofr_slot(MR_curfr));
    fprintf(fp, "\nredo ip: ");
    MR_printlabel(fp, MR_redoip_slot(MR_curfr));
#ifdef  MR_USE_MINIMAL_MODEL_OWN_STACKS
    fprintf(fp, "\ndet fr:  ");
    MR_printdetstack(fp, MR_table_detfr_slot(MR_curfr));
#endif
    fprintf(fp, "\n");

    if (MR_detaildebug) {
        MR_dumpnondetstack(fp);
    }

    fflush(fp);
}
コード例 #2
0
void
MR_mkdettempframe_msg(FILE *fp)
{
    MR_restore_transient_registers();

    if (!MR_lld_print_enabled) {
        return;
    }

    fprintf(fp, "\nnew det temp nondet frame");
    fprintf(fp, "\nnew  fr: ");
    MR_printnondetstack(fp, MR_maxfr);
    fprintf(fp, "\nprev fr: ");
    MR_printnondetstack(fp, MR_prevfr_slot(MR_maxfr));
    fprintf(fp, "\nredo fr: ");
    MR_printnondetstack(fp, MR_redofr_slot(MR_maxfr));
    fprintf(fp, "\nredo ip: ");
    MR_printlabel(fp, MR_redoip_slot(MR_maxfr));
    fprintf(fp, "det fr:  ");
    MR_printdetstack(fp, MR_tmp_detfr_slot(MR_maxfr));
    fprintf(fp, "\n");

    if (MR_detaildebug) {
        MR_dumpnondetstack(fp);
    }
}
コード例 #3
0
void
MR_fail_msg(FILE *fp)
{
    MR_restore_transient_registers();

    MR_do_watches(fp);

    if (!MR_lld_print_enabled) {
        return;
    }

    fprintf(fp, "\nfailing from procedure\n");
    fprintf(fp, "curr fr: ");
    MR_printnondetstack(fp, MR_curfr);
    fprintf(fp, "\nfail fr: ");
    MR_printnondetstack(fp, MR_prevfr_slot(MR_curfr));
    fprintf(fp, "\nfail ip: ");
    MR_printlabel(fp, MR_redoip_slot(MR_prevfr_slot(MR_curfr)));
    fprintf(fp, "\n");
}
コード例 #4
0
void
MR_dumpnondetstack(FILE *fp)
{
    MR_Word *fr;

    fprintf(fp, "\nnondetstack dump\n");
    for (fr = MR_maxfr; MR_above_bottom_nondet_frame(fr);
            fr = MR_prevfr_slot(fr))
    {
        MR_dumpframe(fp, fr);
    }
}
コード例 #5
0
void
MR_dumpframe(FILE *fp, const MR_Word *fr)
{
    int i;

    fprintf(fp, "frame at ");
    MR_printnondetstack(fp, fr),
                        fprintf(fp, "\n");
    fprintf(fp, "\t succip    ");
    MR_printlabel(fp, MR_succip_slot(fr));
    fprintf(fp, "\t redoip    ");
    MR_printlabel(fp, MR_redoip_slot(fr));
    fprintf(fp, "\t succfr    ");
    MR_printnondetstack(fp, MR_succfr_slot(fr));
    fprintf(fp, "\t prevfr    ");
    MR_printnondetstack(fp, MR_prevfr_slot(fr));

    for (i = 1; &MR_based_framevar(fr,i) > MR_prevfr_slot(fr); i++) {
        fprintf(fp, "\t framevar(%d)  %ld 0x%lx\n",
                i, (long) (MR_Integer) MR_based_framevar(fr,i),
                (unsigned long) MR_based_framevar(fr,i));
    }
}
コード例 #6
0
ファイル: mercury_agc_debug.c プロジェクト: htzh/mercury
void
MR_agc_dump_nondet_stack_frames(MR_Internal *label, MR_MemoryZone *heap_zone,
    MR_Word *stack_pointer, MR_Word *current_frame, MR_Word *max_frame)
{
    MR_Code     *success_ip;
    int         frame_size;
    MR_bool     registers_valid;

    while (max_frame > MR_nondet_stack_trace_bottom_fr) {
        registers_valid = (max_frame == current_frame);

        frame_size = max_frame - MR_prevfr_slot(max_frame);
        if (frame_size == MR_NONDET_TEMP_SIZE) {
            fprintf(stderr, "%p: nondet temp\n", max_frame);
            fprintf(stderr, " redoip: ");
            fflush(NULL);
            MR_printlabel(stderr, MR_redoip_slot(max_frame));
            fflush(NULL);
            fprintf(stderr, " redofr: %p\n", MR_redofr_slot(max_frame));

            label = MR_lookup_internal_by_addr(MR_redoip_slot(max_frame));

            if (label && label->MR_internal_layout) {
                MR_dump_live_variables(label->MR_internal_layout, heap_zone,
                    registers_valid, stack_pointer, MR_redofr_slot(max_frame));
            }

        } else if (frame_size == MR_DET_TEMP_SIZE) {
            fprintf(stderr, "%p: nondet temp\n", max_frame);
            fprintf(stderr, " redoip: ");
            fflush(NULL);
            MR_printlabel(stderr, MR_redoip_slot(max_frame));
            fflush(NULL);
            fprintf(stderr, " redofr: %p\n", MR_redofr_slot(max_frame));
            fprintf(stderr, " detfr:  %p\n", MR_tmp_detfr_slot(max_frame));

            label = MR_lookup_internal_by_addr(MR_redoip_slot(max_frame));

            if (label && label->MR_internal_layout) {
                MR_dump_live_variables(label->MR_internal_layout, heap_zone,
                    registers_valid, MR_tmp_detfr_slot(max_frame), max_frame);
                // XXX Should max_frame above be
                // MR_redoip_slot(max_frame) instead?

            }

        } else {
            fprintf(stderr, "%p: nondet ordinary\n", max_frame);
            fprintf(stderr, " redoip: ");
            fflush(NULL);
            MR_printlabel(stderr, MR_redoip_slot(max_frame));
            fflush(NULL);
            fprintf(stderr, " redofr: %p\n", MR_redofr_slot(max_frame));
            fprintf(stderr, " succip: ");
            fflush(NULL);
            MR_printlabel(stderr, MR_succip_slot(max_frame));
            fflush(NULL);
            fprintf(stderr, " succfr: %p\n", MR_succfr_slot(max_frame));

            // XXX ???
            label = MR_lookup_internal_by_addr(MR_redoip_slot(max_frame));

            if (label != NULL && label->MR_internal_layout) {
                MR_dump_live_variables(label->MR_internal_layout, heap_zone,
                    registers_valid, stack_pointer, MR_redofr_slot(max_frame));
                fprintf(stderr, " this label: %s\n", label->MR_internal_name);
            }
        }

        max_frame = MR_prevfr_slot(max_frame);
    }

    // XXX Lookup the address (redoip?) and dump the variables.

    fflush(NULL);
}
コード例 #7
0
ファイル: mercury_stacks.c プロジェクト: htzh/mercury
MR_Word *
MR_new_nondetstack_segment(MR_Word *maxfr, int incr)
{
    MR_Word         *sentinel_maxfr;
    MR_Word         *old_maxfr;
    MR_Word         *old_curfr;
    MR_MemoryZone   *new_cur_zone;
    MR_MemoryZones  *new_prev_zones;

    old_maxfr = maxfr;
    old_curfr = MR_curfr;

#ifdef  MR_DEBUG_STACK_SEGMENTS
    printf("\nadding new nondet stack segment");
    printf("\ncontext: %p", &MR_ENGINE(MR_eng_context));
    printf("\nold maxfr: ");
    MR_printnondetstack(stdout, old_maxfr);
    printf("\nold curfr: ");
    MR_printnondetstack(stdout, old_curfr);
    printf("\n");
#endif

    new_cur_zone = MR_rewind_nondetstack_segments(maxfr);
    if (new_cur_zone == NULL) {
        // There is no old segment to reuse in the nondet stack itself,
        // so allocate a new one (possibly one that was freed earlier).
        //
        // Note that we perform explicit overflow checks, so redzones
        // would just waste space.

        new_cur_zone = MR_create_or_reuse_zone("nondetstack_segment",
            MR_nondetstack_size, 0, 0, MR_default_handler);
    }

#ifdef  MR_DEBUG_STACK_SEGMENTS
    printf("\nbefore creating new nondet segment:\n");
    MR_print_zone(stdout, MR_CONTEXT(MR_ctxt_nondetstack_zone));
    printf("\n");
#endif

    new_prev_zones = MR_GC_malloc_uncollectable_attrib(sizeof(MR_MemoryZones),
        MR_ALLOC_SITE_RUNTIME);
    new_prev_zones->MR_zones_head = MR_CONTEXT(MR_ctxt_nondetstack_zone);
    new_prev_zones->MR_zones_tail = MR_CONTEXT(MR_ctxt_prev_nondetstack_zones);
    MR_CONTEXT(MR_ctxt_prev_nondetstack_zones) = new_prev_zones;
    MR_CONTEXT(MR_ctxt_nondetstack_zone) = new_cur_zone;
    MR_CONTEXT(MR_ctxt_maxfr) = new_cur_zone->MR_zone_min;

    MR_maxfr_word = (MR_Word) MR_CONTEXT(MR_ctxt_maxfr);

#ifdef  MR_DEBUG_STACK_SEGMENTS
    printf("\nafter creating new nondet segment\n");
    printf("new maxfr: ");
    MR_printnondetstack(stdout, MR_maxfr);
    printf("\nnew cur zone:\n");
    MR_print_zone(stdout, MR_CONTEXT(MR_ctxt_nondetstack_zone));
    printf("new prev zones:\n");
    MR_print_zones(stdout, MR_CONTEXT(MR_ctxt_prev_nondetstack_zones));
    printf("\n");
    fflush(stdout);
#endif

    // The stack trace tracing code needs to know the size of each nondet
    // stack frame, since it uses the size to classify frames as temp or
    // ordinary. The size is given by the difference in address between
    // the address of the frame and the address of the previous frame.
    // This difference would yield an incorrect size and hence an incorrect
    // frame classification if a temp frame were allowed to have a frame
    // on a different segment as its immediate predecessor.
    //
    // We prevent this by putting an ordinary (i.e. non-temp) frame at the
    // bottom of every new nondet stack segment as a sentinel. We hand-build
    // this frame, since it is not an "ordinary" ordinary frame. It is not
    // created by a call, so it has no meaningful success continuation,
    // and since it does not make any calls, no other frame's success
    // continuation can point to it either.
    //
    // We store three pieces of information in the sentinel frame.
    //
    // - The maxfr at the time the sentinel frame was created, which we store
    //   in the prevfr slot. This is actually the address of the logically
    //   previous frame, so we are using the slot for its intended purpose,
    //   but the difference between the addresses of the two frames is NOT
    //   the size of the sentinel frame.
    //
    // - The curfr at the time the sentinel frame was created, which we store
    //   in the succfr slot. This is NOT actually the frame of the success
    //   continuation; we can store it there because this frame HAS no
    //   meaningful success continuation, so the slot is not needed for its
    //   intended purpose.
    //
    // - The address of the MR_MemoryZone structure of the zone containing
    //   the sentinel frame, which we store in framevar 1. This is used by
    //   the code of MR_pop_nondetstack_segment.

    sentinel_maxfr = MR_maxfr + (MR_NONDET_FIXED_SIZE + 1);
    MR_prevfr_slot_word(sentinel_maxfr) = (MR_Word) old_maxfr;
    MR_succfr_slot_word(sentinel_maxfr) = (MR_Word) old_curfr;
    MR_succip_slot_word(sentinel_maxfr) =
        (MR_Word) MR_ENTRY(MR_do_not_reached);
    MR_redofr_slot_word(sentinel_maxfr) = (MR_Word) sentinel_maxfr;
    MR_redoip_slot_word(sentinel_maxfr) =
        (MR_Word) MR_ENTRY(MR_pop_nondetstack_segment);
    MR_based_framevar(sentinel_maxfr, 1) = (MR_Word) new_cur_zone;

#ifdef  MR_DEBUG_STACK_SEGMENTS
    printf("creating sentinel frame:\n");
    printf("sentinel_maxfr: ");
    MR_printnondetstack(stdout, sentinel_maxfr);
    printf("\nsentinel frame's prevfr slot: ");
    MR_printnondetstack(stdout, MR_prevfr_slot(sentinel_maxfr));
    printf("\nsentinel frame's succfr slot: ");
    MR_printnondetstack(stdout, MR_succfr_slot(sentinel_maxfr));
    printf("\nsentinel frame's redofr slot: ");
    MR_printnondetstack(stdout, MR_redofr_slot(sentinel_maxfr));
    printf("\n");
#endif

    // Reserve space for the new nondet stack frame on top of the
    // sentinel frame.

    MR_maxfr_word = (MR_Word) (sentinel_maxfr + incr);

#ifdef  MR_DEBUG_STACK_SEGMENTS
    printf("after creating sentinel frame and reserving %d words:\n", incr);
    printf("new maxfr: ");
    MR_printnondetstack(stdout, MR_maxfr);
    printf("\n");
    fflush(stdout);
#endif

    return MR_maxfr;
}