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tsan: extend mmap test 

Test size larger than clear_shadow_mmap_threshold,
which is handled differently.

Depends on D114348.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D114366
This commit is contained in:
Dmitry Vyukov 2021-11-22 15:44:00 +01:00
parent 734e2386ff
commit 764b35d89f
1 changed files with 9 additions and 7 deletions
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16
compiler-rt/test/tsan/ignored-interceptors-mmap.cpp
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@ -1,6 +1,8 @@
// RUN: %clangxx_tsan -O0 %s -o %t
// RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-RACE
// RUN: %run %t ignore 2>&1 | FileCheck %s --check-prefix=CHECK-IGNORE
// RUN: not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK-RACE
// Test size larger than clear_shadow_mmap_threshold, which is handled differently.
// RUN: not %run %t - 262144 2>&1 | FileCheck %s --check-prefix=CHECK-RACE
// RUN: %run %t ignore 2>&1 | FileCheck %s --check-prefix=CHECK-IGNORE
#include <sys/mman.h>
#include <string.h>
@ -14,11 +16,10 @@
// respects ignore annotations.
std::atomic<int*> global_p;
void mmap_ignored(bool ignore) {
const size_t kSize = sysconf(_SC_PAGESIZE);
void mmap_ignored(bool ignore, size_t size) {
if (ignore) AnnotateIgnoreWritesBegin(__FILE__, __LINE__);
void *p = mmap(0, kSize, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
void *p =
mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
if (ignore) AnnotateIgnoreWritesEnd(__FILE__, __LINE__);
// Use relaxed to retain the race between the mmap call and the memory write
@ -35,11 +36,12 @@ void *WriteToMemory(void *unused) {
// Create race between allocating (mmap) and writing memory
int main(int argc, const char *argv[]) {
bool ignore = (argc > 1) && (strcmp(argv[1], "ignore") == 0);
size_t size = argc > 2 ? atoi(argv[2]) : sysconf(_SC_PAGESIZE);
barrier_init(&barrier, 2);
pthread_t t;
pthread_create(&t, 0, WriteToMemory, 0);
mmap_ignored(ignore);
mmap_ignored(ignore, size);
pthread_join(t, 0);
assert(global_p[0] == 7);