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69 lines
2.5 KiB
C
69 lines
2.5 KiB
C
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/****************************************************************************
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* apps/examples/fdpicxip/modules/user.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/* Uses libcounter.so. Two instances run concurrently: if the library's
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* data were shared between them the totals would interleave.
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*
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* libcounter is also a *leaf* library -- it calls nothing outside itself,
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* so it has no PLT and therefore no DT_PLTGOT. The loader has to fall back
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* to PT_DYNAMIC vaddr + memsz to find its GOT. If that fallback is wrong
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* the library cannot reach its own globals, which is exactly what the total
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* below would expose.
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdlib.h>
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#include <syslog.h>
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#include <unistd.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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extern int counter_bump(int by);
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extern int counter_total(void);
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int main(int argc, char *argv[])
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{
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int seed = (argc > 1) ? atoi(argv[1]) : 0;
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int i;
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for (i = 0; i < 3; i++)
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{
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counter_bump(seed);
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usleep(100000);
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}
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syslog(LOG_INFO, "[user %d] library total = %d (expected %d) -- %s\n",
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seed, counter_total(), seed * 3,
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counter_total() == seed * 3 ? "PASS" : "FAIL");
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/* Reported through the exit status as well as the log, so a test can
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* assert on it rather than a human reading the console.
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*/
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return counter_total() == seed * 3 ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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