tsan: fix false positive related to signals

Write interceptor calls malloc, which causes a false
unsafe-call-in-signal-handler report. See the test.

llvm-svn: 219784

1 files changed, 5 insertions, 4 deletions

diff --git a/compiler-rt/lib/tsan/rtl/tsan_fd.cc b/compiler-rt/lib/tsan/rtl/tsan_fd.cc
index 68242e03ce1..d18502f0054 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_fd.cc
+++ b/compiler-rt/lib/tsan/rtl/tsan_fd.cc
@@ -48,7 +48,8 @@ static bool bogusfd(int fd) {
 }
 
 static FdSync *allocsync(ThreadState *thr, uptr pc) {
-  FdSync *s = (FdSync*)user_alloc(thr, pc, sizeof(FdSync));
+  FdSync *s = (FdSync*)user_alloc(thr, pc, sizeof(FdSync), kDefaultAlignment,
+      false);
   atomic_store(&s->rc, 1, memory_order_relaxed);
   return s;
 }
@@ -65,7 +66,7 @@ static void unref(ThreadState *thr, uptr pc, FdSync *s) {
       CHECK_NE(s, &fdctx.globsync);
       CHECK_NE(s, &fdctx.filesync);
       CHECK_NE(s, &fdctx.socksync);
-      user_free(thr, pc, s);
+      user_free(thr, pc, s, false);
     }
   }
 }
@@ -78,13 +79,13 @@ static FdDesc *fddesc(ThreadState *thr, uptr pc, int fd) {
   if (l1 == 0) {
     uptr size = kTableSizeL2 * sizeof(FdDesc);
     // We need this to reside in user memory to properly catch races on it.
-    void *p = user_alloc(thr, pc, size);
+    void *p = user_alloc(thr, pc, size, kDefaultAlignment, false);
     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
-      user_free(thr, pc, p);
+      user_free(thr, pc, p, false);
   }
   return &((FdDesc*)l1)[fd % kTableSizeL2];  // NOLINT
 }