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