Date: Mon, 2 Oct 2023 19:26:32 GMT From: Robert Clausecker <fuz@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: b166580681e3 - main - lib/libc/tests/string/memcmp_test.c: extend test to support custom memcmp function Message-ID: <202310021926.392JQWfe085730@gitrepo.freebsd.org>
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The branch main has been updated by fuz: URL: https://cgit.FreeBSD.org/src/commit/?id=b166580681e3af173ec368656019d02ba1cc55ad commit b166580681e3af173ec368656019d02ba1cc55ad Author: Robert Clausecker <fuz@FreeBSD.org> AuthorDate: 2023-07-14 11:56:12 +0000 Commit: Robert Clausecker <fuz@FreeBSD.org> CommitDate: 2023-10-02 19:25:21 +0000 lib/libc/tests/string/memcmp_test.c: extend test to support custom memcmp function Extend the tests to permit loading an external memcmp function and testing it over using the libc version. This was added by the example of other tests in the test suite doing the same thing and helped tremendously in development. This change was originally part of D41442 but was taken out to permit separate review as extrapolated from @ngie's request in D41349. Sponsored by: FreeBSD Foundation Approved by: ngie Differential Revision: https://reviews.freebsd.org/D41528 --- lib/libc/tests/string/memcmp_test.c | 57 +++++++++++++++++++++---------------- 1 file changed, 33 insertions(+), 24 deletions(-) diff --git a/lib/libc/tests/string/memcmp_test.c b/lib/libc/tests/string/memcmp_test.c index ab782c92f255..f42bccfca529 100644 --- a/lib/libc/tests/string/memcmp_test.c +++ b/lib/libc/tests/string/memcmp_test.c @@ -26,18 +26,21 @@ #include <sys/cdefs.h> #include <assert.h> +#include <dlfcn.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <atf-c.h> +static int (*memcmp_fn)(const void *, const void *, size_t); + ATF_TC_WITHOUT_HEAD(zero); ATF_TC_BODY(zero, tc) { - assert(memcmp("a", "b", 0) == 0); - assert(memcmp("", "", 0) == 0); + assert(memcmp_fn("a", "b", 0) == 0); + assert(memcmp_fn("", "", 0) == 0); } ATF_TC_WITHOUT_HEAD(eq); @@ -49,9 +52,9 @@ ATF_TC_BODY(eq, tc) for (i = 0; i < 256; i++) data1[i] = data2[i] = i ^ 0x55; for (i = 1; i < 256; i++) - assert(memcmp(data1, data2, i) == 0); + assert(memcmp_fn(data1, data2, i) == 0); for (i = 1; i < 256; i++) - assert(memcmp(data1 + i, data2 + i, 256 - i) == 0); + assert(memcmp_fn(data1 + i, data2 + i, 256 - i) == 0); } ATF_TC_WITHOUT_HEAD(neq); @@ -65,9 +68,9 @@ ATF_TC_BODY(neq, tc) data2[i] = i ^ 0x55; } for (i = 1; i < 256; i++) - assert(memcmp(data1, data2, i) != 0); + assert(memcmp_fn(data1, data2, i) != 0); for (i = 1; i < 256; i++) - assert(memcmp(data1 + i, data2 + i, 256 - i) != 0); + assert(memcmp_fn(data1 + i, data2 + i, 256 - i) != 0); } ATF_TC_WITHOUT_HEAD(diff); @@ -81,37 +84,43 @@ ATF_TC_BODY(diff, tc) data1[128] = 255; data2[128] = 0; for (i = 1; i < 66; i++) { - assert(memcmp(data1 + 128, data2 + 128, i) == 255); - assert(memcmp(data2 + 128, data1 + 128, i) == -255); - assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == 255); - assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == -255); - assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == 255); - assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == -255); + assert(memcmp_fn(data1 + 128, data2 + 128, i) == 255); + assert(memcmp_fn(data2 + 128, data1 + 128, i) == -255); + assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i) == 255); + assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i) == -255); + assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i * 2) == 255); + assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i * 2) == -255); } data1[128] = 'c'; data2[128] = 'e'; for (i = 1; i < 66; i++) { - assert(memcmp(data1 + 128, data2 + 128, i) == -2); - assert(memcmp(data2 + 128, data1 + 128, i) == 2); - assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == -2); - assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == 2); - assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == -2); - assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == 2); + assert(memcmp_fn(data1 + 128, data2 + 128, i) == -2); + assert(memcmp_fn(data2 + 128, data1 + 128, i) == 2); + assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i) == -2); + assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i) == 2); + assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i * 2) == -2); + assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i * 2) == 2); } memset(data1 + 129, 'A', sizeof(data1) - 129); memset(data2 + 129, 'Z', sizeof(data2) - 129); for (i = 1; i < 66; i++) { - assert(memcmp(data1 + 128, data2 + 128, i) == -2); - assert(memcmp(data2 + 128, data1 + 128, i) == 2); - assert(memcmp(data1 + 129 - i, data2 + 129 - i, i) == -2); - assert(memcmp(data2 + 129 - i, data1 + 129 - i, i) == 2); - assert(memcmp(data1 + 129 - i, data2 + 129 - i, i * 2) == -2); - assert(memcmp(data2 + 129 - i, data1 + 129 - i, i * 2) == 2); + assert(memcmp_fn(data1 + 128, data2 + 128, i) == -2); + assert(memcmp_fn(data2 + 128, data1 + 128, i) == 2); + assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i) == -2); + assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i) == 2); + assert(memcmp_fn(data1 + 129 - i, data2 + 129 - i, i * 2) == -2); + assert(memcmp_fn(data2 + 129 - i, data1 + 129 - i, i * 2) == 2); } } ATF_TP_ADD_TCS(tp) { + void *dl_handle; + + dl_handle = dlopen(NULL, RTLD_LAZY); + memcmp_fn = dlsym(dl_handle, "test_memcmp"); + if (memcmp_fn == NULL) + memcmp_fn = memcmp; ATF_TP_ADD_TC(tp, zero); ATF_TP_ADD_TC(tp, eq);
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