[TSan] Allocate fd table in user heap instead of using internal allocator. We need this to catch races on fds.
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@179841 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/tsan/rtl/tsan_fd.cc b/lib/tsan/rtl/tsan_fd.cc
index b3cb884..14bdbb5 100644
--- a/lib/tsan/rtl/tsan_fd.cc
+++ b/lib/tsan/rtl/tsan_fd.cc
@@ -74,13 +74,14 @@
uptr l1 = atomic_load(pl1, memory_order_consume);
if (l1 == 0) {
uptr size = kTableSizeL2 * sizeof(FdDesc);
- void *p = internal_alloc(MBlockFD, size);
+ // We need this to reside in user memory to properly catch races on it.
+ void *p = user_alloc(thr, pc, size);
internal_memset(p, 0, size);
MemoryResetRange(thr, (uptr)&fddesc, (uptr)p, size);
if (atomic_compare_exchange_strong(pl1, &l1, (uptr)p, memory_order_acq_rel))
l1 = (uptr)p;
else
- internal_free(p);
+ user_free(thr, pc, p);
}
return &((FdDesc*)l1)[fd % kTableSizeL2]; // NOLINT
}