--- /dev/null
+#include <stdint.h>
+#include <pthread.h>
+#include "test.h"
+
+static __thread char d1 = 11;
+static __thread char d64 __attribute__ ((aligned(64))) = 22;
+static __thread char d4096 __attribute__ ((aligned(4096))) = 33;
+static __thread char z1 = 0;
+static __thread char z64 __attribute__ ((aligned(64))) = 0;
+static __thread char z4096 __attribute__ ((aligned(4096))) = 0;
+
+static int tnum;
+
+#define CHECK(c, fmt, ...) do{ \
+ if (!(c)) \
+ t_error("[thread %d]: "#c" failed"fmt".\n", tnum, __VA_ARGS__); \
+}while(0)
+
+static unsigned ptrmod(void *p, unsigned m)
+{
+ volatile unsigned n = (uintptr_t)p;
+ return n % m;
+}
+
+static void *check(void *arg)
+{
+ tnum++;
+
+ CHECK(d1 == 11, " want 11 got %d", d1);
+ CHECK(d64 == 22, " want 22 got %d", d64);
+ CHECK(d4096 == 33, " want 33 got %d", d4096);
+
+ CHECK(ptrmod(&d64, 64) == 0, " address is %p, want 64 byte alignment", &d64);
+ CHECK(ptrmod(&d4096, 4096) == 0, " address is %p, want 4096 byte alignment", &d4096);
+
+ CHECK(z1 == 0, " want 0 got %d", z1);
+ CHECK(z64 == 0, " want 0 got %d", z64);
+ CHECK(z4096 == 0, " want 0 got %d", z4096);
+
+ CHECK(ptrmod(&z64, 64) == 0, " address is %p, want 64 byte alignment", &z64);
+ CHECK(ptrmod(&z4096, 4096) == 0, " address is %p, want 4096 byte alignment", &z4096);
+ return 0;
+}
+
+int main()
+{
+ pthread_t td;
+
+ check(0);
+ CHECK(pthread_create(&td, 0, check, 0) == 0, "", "");
+ CHECK(pthread_join(td, 0) == 0, "", "");
+
+ return t_status;
+}