mcexec: memory policy control by environmental variable

Refs: #1470
Change-Id: I3d556cae90d31d81572b1c4e5c680e826577d428

test/issues/1470/src/check_mempolicy.c

@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <numaif.h>
+#include <okng.h>
+
+#define PLD_PROCESS_NUMA_MASK_BITS 256
+
+int main(int argc, char **argv)
+{
+	long ret;
+	int mode;
+	unsigned long nodemask[PLD_PROCESS_NUMA_MASK_BITS /
+			       (sizeof(unsigned long) * 8)] = { 0 };
+	int mode_expected = -1;
+	unsigned long nodemask_expected[PLD_PROCESS_NUMA_MASK_BITS /
+					(sizeof(unsigned long) * 8)] = { 0 };
+	int opt;
+
+	while ((opt = getopt(argc, argv, "m:n:")) != -1) {
+		switch (opt) {
+		case 'm':
+			mode_expected = atol(optarg);
+			break;
+		case 'n':
+			nodemask_expected[0] = atoi(optarg);
+			break;
+		default: /* '?' */
+			INTERR(1, "unknown option %c\n", optopt);
+		}
+	}
+
+	INTERR(mode_expected == -1, "specify -m <mode>\n");
+
+	ret = get_mempolicy(&mode, nodemask, PLD_PROCESS_NUMA_MASK_BITS,
+			    NULL, 0);
+	INTERR(ret, "get_mempolicy failed with %ld\n", ret);
+
+	OKNG(mode == mode_expected, "mode: actual (%d), expected (%d)\n",
+	     mode, mode_expected);
+
+	/* nodemask is "don't care" when mode is MPOL_DEFAULT */
+	if (mode_expected != 0) {
+		OKNG(nodemask[0] == nodemask_expected[0],
+		     "nodemask: actual (%ld), expected (%ld)\n",
+		     nodemask[0],
+		     nodemask_expected[0]);
+	}
+
+	ret = 0;
+ out:
+	return ret;
+}