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// RUN: %clangxx_tsan %s -o %t
// RUN: %run %t 2>&1 | FileCheck %s
#include <pthread.h>
#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <stdio.h>
#include <time.h>
#include <sys/mman.h>
const long kSmallPage = 4 << 10;
const long kLargePage = 2 << 20;
const long kStride = 1 << 10;
typedef unsigned long uptr;
int main(int argc, const char **argv) {
uptr mem_size = 4 << 20;
if (argc > 1)
mem_size = (uptr)atoi(argv[1]) << 20;
uptr stride = kSmallPage;
if (argc > 2)
stride = (uptr)atoi(argv[2]) << 10;
int niter = 1;
if (argc > 3)
niter = atoi(argv[3]);
int stride2 = 1;
if (argc > 4)
stride2 = atoi(argv[4]);
uptr sz = mem_size + stride2 * kStride + kLargePage;
void *p = mmap(0, sz, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
uptr a = ((uptr)p + kLargePage - 1) & ~(kLargePage - 1);
volatile char *mem = (volatile char *)a;
for (int i = 0; i < niter; i++) {
for (uptr off = 0; off < mem_size; off += stride) {
for (uptr off2 = 0; off2 < stride2; off2++)
mem[off + off2 * kStride] = 42;
}
}
fprintf(stderr, "DONE\n");
}
// CHECK: DONE
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