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- Log ----------------------------------------------------------------- commit cf6c40b8881cfe78e134e2919b184e04025c1e25 Author: Waldemar Brodkorb wbx@uclibc-ng.org Date: Tue Apr 26 19:43:48 2016 +0200

test: add memmove test

Triggers a bug in MIPS code under certain circumstances, which are unclear at the moment.

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Summary of changes: test/string/tst-memmove.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 test/string/tst-memmove.c

diff --git a/test/string/tst-memmove.c b/test/string/tst-memmove.c new file mode 100644 index 0000000..799e72e --- /dev/null +++ b/test/string/tst-memmove.c @@ -0,0 +1,44 @@ +# Copyright (C) 2016 Rene Nielsen rene.nielsen@microsemi.com +# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. + +#include <string.h> +#include <stdio.h> + +#define LEN 1024 + +int main(int argc, char *argv[]) +{ + unsigned char a[LEN], exp; + int i, move_len, move_src, err = 0; + + // Fill the array with increasing values from 0 to LEN - 1 (wrap is fine) + for (i = 0; i < LEN; i++) { + a[i] = i; + } + + // move_src is the index into the array to move from. + // move_len is the number of indices to move. Here, we take the remainder. + move_src = LEN / 64; + move_len = LEN - move_src; + + printf("Moving %d entries from index %d to 0\n", move_len, move_src); + memmove(a, &a[move_src], sizeof(a[0]) * move_len); + + // Check that the memmove went well + for (i = 0; i < LEN; i++) { + // Expect that the first #move_len entries contain increasing values + // starting at #move_src and the last #move_src entries are untouched. + exp = i >= move_len ? i : i + move_src; + if (a[i] != exp) { + printf("Error: memmove() failed. Expected a[%d] = %u, got %u\n", i, exp, a[i]); + err = 1; + } + } + + if (!err) { + printf("memmove() succeeded\n"); + } + + return err; +} +

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