xref: /aosp_15_r20/external/compiler-rt/test/tsan/java_heap_init.cc (revision 7c3d14c8b49c529e04be81a3ce6f5cc23712e4c6)
1*7c3d14c8STreehugger Robot // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
2*7c3d14c8STreehugger Robot #include "java.h"
3*7c3d14c8STreehugger Robot #include <errno.h>
4*7c3d14c8STreehugger Robot #include <sys/mman.h>
5*7c3d14c8STreehugger Robot 
main()6*7c3d14c8STreehugger Robot int main() {
7*7c3d14c8STreehugger Robot   // Test that munmap interceptor resets meta shadow for the memory range.
8*7c3d14c8STreehugger Robot   // Previously __tsan_java_move failed because it encountered non-zero meta
9*7c3d14c8STreehugger Robot   // shadow for the destination.
10*7c3d14c8STreehugger Robot   int const kHeapSize = 1024 * 1024;
11*7c3d14c8STreehugger Robot   jptr jheap = (jptr)mmap(0, kHeapSize, PROT_READ | PROT_WRITE,
12*7c3d14c8STreehugger Robot       MAP_ANON | MAP_PRIVATE, -1, 0);
13*7c3d14c8STreehugger Robot   if (jheap == (jptr)MAP_FAILED)
14*7c3d14c8STreehugger Robot     return printf("mmap failed with %d\n", errno);
15*7c3d14c8STreehugger Robot   __atomic_store_n((int*)jheap, 1, __ATOMIC_RELEASE);
16*7c3d14c8STreehugger Robot   munmap((void*)jheap, kHeapSize);
17*7c3d14c8STreehugger Robot   jheap = (jptr)mmap((void*)jheap, kHeapSize, PROT_READ | PROT_WRITE,
18*7c3d14c8STreehugger Robot       MAP_ANON | MAP_PRIVATE, -1, 0);
19*7c3d14c8STreehugger Robot   if (jheap == (jptr)MAP_FAILED)
20*7c3d14c8STreehugger Robot     return printf("second mmap failed with %d\n", errno);
21*7c3d14c8STreehugger Robot   __tsan_java_init(jheap, kHeapSize);
22*7c3d14c8STreehugger Robot   __tsan_java_move(jheap + 16, jheap, 16);
23*7c3d14c8STreehugger Robot   fprintf(stderr, "DONE\n");
24*7c3d14c8STreehugger Robot   return __tsan_java_fini();
25*7c3d14c8STreehugger Robot }
26*7c3d14c8STreehugger Robot 
27*7c3d14c8STreehugger Robot // CHECK-NOT: WARNING: ThreadSanitizer: data race
28*7c3d14c8STreehugger Robot // CHECK: DONE
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