jemalloc: Import 5.3.0 54eaed1d8b56b1aa528be3bdd1877e59c56fa90cvendor/jemalloc/5.3.0vendor/jemalloc

Import jemalloc 5.3.0.

This import changes how manage the jemalloc vendor branch (which was
just started anyway). Starting with 5.3.0, we import a clean tree from
the upstream github, removing all the old files that are no longer
upstream, or that we've kept around for some reason. We do this because
we merge from this raw version of jemalloc into the FreeBSD
contrib/jemalloc, then we run autogen stuff, generate all the generated
.h files with gmake, then finally remove much of the generated files in
contrib/jemalloc using an update script.

Sponsored by:		Netflix

1 files changed, 40 insertions, 0 deletions

diff --git a/test/unit/zero_reallocs.c b/test/unit/zero_reallocs.c
new file mode 100644
index 000000000000..66c7a404a7dd
--- /dev/null
+++ b/test/unit/zero_reallocs.c
@@ -0,0 +1,40 @@
+#include "test/jemalloc_test.h"
+
+static size_t
+zero_reallocs() {
+	if (!config_stats) {
+		return 0;
+	}
+	size_t count = 12345;
+	size_t sz = sizeof(count);
+
+	expect_d_eq(mallctl("stats.zero_reallocs", (void *)&count, &sz,
+	    NULL, 0), 0, "Unexpected mallctl failure");
+	return count;
+}
+
+TEST_BEGIN(test_zero_reallocs) {
+	test_skip_if(!config_stats);
+
+	for (size_t i = 0; i < 100; ++i) {
+		void *ptr = mallocx(i * i + 1, 0);
+		expect_ptr_not_null(ptr, "Unexpected mallocx error");
+		size_t count = zero_reallocs();
+		expect_zu_eq(i, count, "Incorrect zero realloc count");
+		ptr = realloc(ptr, 0);
+		expect_ptr_null(ptr, "Realloc didn't free");
+		count = zero_reallocs();
+		expect_zu_eq(i + 1, count, "Realloc didn't adjust count");
+	}
+}
+TEST_END
+
+int
+main(void) {
+	/*
+	 * We expect explicit counts; reentrant tests run multiple times, so
+	 * counts leak across runs.
+	 */
+	return test_no_reentrancy(
+	    test_zero_reallocs);
+}