+
+ // Valgrind's leak checker complains glibc's stack allocation.
+ // To appease valgrind, we provide our own stack for each thread.
+ void *allocate_stack(pthread_attr_t &a, size_t n = 65536) {
+ void *stack = malloc(n);
+ pthread_attr_init(&a);
+#if defined(__linux__)
+ pthread_attr_setstack(&a, stack, n);
+#endif
+ return stack;
+ }