fb19400d4e
If tsan runtime will try to allocate something during exit handling, the allocation will fail because there is no VA whatsoever. It's observed to fail with the following error in some cases: failed to allocate 0x1000 (4096) bytes of DTLS_NextBlock. So terminate the process immediately. Reviewed-in: https://reviews.llvm.org/D96874
36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
|
|
|
|
// Test that mmap does not return unexpected addresses
|
|
// (the check is in the interceptor).
|
|
|
|
#include <fcntl.h>
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
int main() {
|
|
int fd = open("/dev/zero", O_RDWR);
|
|
if (fd == -1) perror("open(/dev/zero)"), exit(1);
|
|
for (size_t mmap_size = 64ull << 30; mmap_size >= 4 << 10; mmap_size /= 2) {
|
|
size_t allocated = 0;
|
|
while (mmap(0, mmap_size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
|
|
fd, 0) != MAP_FAILED) {
|
|
allocated += mmap_size;
|
|
}
|
|
fprintf(stderr, "allocated %zu with size %zu\n", allocated, mmap_size);
|
|
}
|
|
fprintf(stderr, "DONE\n");
|
|
// If tsan runtime will try to allocate something during exit handling,
|
|
// the allocation will fail because there is no VA whatsoever.
|
|
// It's observed to fail with the following error in some cases:
|
|
// failed to allocate 0x1000 (4096) bytes of DTLS_NextBlock.
|
|
// So terminate the process immediately.
|
|
_exit(0);
|
|
}
|
|
|
|
// CHECK: DONE
|