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Diffstat (limited to 'tests/leb128.c')
| -rw-r--r-- | tests/leb128.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/tests/leb128.c b/tests/leb128.c new file mode 100644 index 00000000..47b57c0d --- /dev/null +++ b/tests/leb128.c @@ -0,0 +1,173 @@ +/* Test program for leb128 + Copyright (C) 2020 Tom Tromey + This file is part of elfutils. + + This file is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + elfutils is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include <config.h> +#include <stddef.h> +#include <stdbool.h> +#include <stdint.h> +#include <libdw.h> +#include "../libdw/libdwP.h" +#include "../libdw/memory-access.h" + +#define OK 0 +#define FAIL 1 + +static const unsigned char v0[] = { 0x0 }; +static const unsigned char v1[] = { 0x1 }; +static const unsigned char v23[] = { 23 }; +static const unsigned char vm_1[] = { 0x7f }; +static const unsigned char vm_2[] = { 0x7e }; +static const unsigned char s127[] = { 0xff, 0x00 }; +static const unsigned char v128[] = { 0x80, 0x01 }; +static const unsigned char v129[] = { 0x81, 0x01 }; +static const unsigned char vm_127[] = { 0x81, 0x7f }; +static const unsigned char vm_128[] = { 0x80, 0x7f }; +static const unsigned char vm_129[] = { 0xff, 0x7e }; +static const unsigned char vhuge[] = + { + 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0x0 + }; +static const unsigned char most_positive[] = + { + 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0x3f + }; +static const unsigned char most_negative[] = + { + 0x80, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x40 + }; +static const unsigned char minus_one[] = + { + 0xff, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0x7f + }; +static const unsigned char int64_max_m1[] = + { + 0xfe, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xff, 0xff, 0x00 + }; +static const unsigned char int64_min_p1[] = + { + 0x81, 0x80, 0x80, 0x80, 0x80, + 0x80, 0x80, 0x80, 0x80, 0x7f + }; + +static int +test_one_sleb (const unsigned char *data, size_t len, int64_t expect) +{ + int64_t value; + const unsigned char *p; + + p = data; + get_sleb128 (value, p, p + len); + if (value != expect || p != data + len) + return FAIL; + + p = data; + get_sleb128_unchecked (value, p); + if (value != expect || p != data + len) + return FAIL; + + return OK; +} + +static int +test_sleb (void) +{ +#define TEST(ARRAY, V) \ + if (test_one_sleb (ARRAY, sizeof (ARRAY), V) != OK) \ + return FAIL; + + TEST (v0, 0); + TEST (v1, 1); + TEST (v23, 23); + TEST (vm_1, -1); + TEST (vm_2, -2); + TEST (s127, 127); + TEST (v128, 128); + TEST (v129, 129); + TEST (vm_127, -127); + TEST (vm_128, -128); + TEST (vm_129, -129); + TEST (vhuge, 9223372036854775807ll); + TEST (most_positive, 4611686018427387903ll); + TEST (most_negative, -4611686018427387904ll); + TEST (minus_one, -1); + TEST (int64_max_m1, INT64_MAX - 1); + TEST (int64_min_p1, INT64_MIN + 1); + +#undef TEST + + return OK; +} + +static int +test_one_uleb (const unsigned char *data, size_t len, uint64_t expect) +{ + uint64_t value; + const unsigned char *p; + + p = data; + get_uleb128 (value, p, p + len); + if (value != expect || p != data + len) + return FAIL; + + p = data; + get_uleb128_unchecked (value, p); + if (value != expect || p != data + len) + return FAIL; + + return OK; +} + +static int +test_uleb (void) +{ +#define TEST(ARRAY, V) \ + if (test_one_uleb (ARRAY, sizeof (ARRAY), V) != OK) \ + return FAIL; + + TEST (v0, 0); + TEST (v1, 1); + TEST (v23, 23); + TEST (vm_1, 127); + TEST (vm_2, 126); + TEST (s127, 127); + TEST (v128, 128); + TEST (v129, 129); + TEST (vm_127, 16257); + TEST (vm_128, 16256); + TEST (vm_129, 16255); + TEST (vhuge, 9223372036854775807ull); + TEST (most_positive, 4611686018427387903ull); + TEST (most_negative, 4611686018427387904ull); + TEST (minus_one, 9223372036854775807ull); + TEST (int64_max_m1, INT64_MAX - 1); + TEST (int64_min_p1, INT64_MIN + 1); + +#undef TEST + + return OK; +} + +int +main (void) +{ + return test_sleb () || test_uleb (); +} |