diff --git a/compiler-rt/lib/dfsan/dfsan_custom.cpp b/compiler-rt/lib/dfsan/dfsan_custom.cpp
--- a/compiler-rt/lib/dfsan/dfsan_custom.cpp
+++ b/compiler-rt/lib/dfsan/dfsan_custom.cpp
@@ -937,6 +937,30 @@
   return ret;
 }
 
+SANITIZER_INTERFACE_ATTRIBUTE
+sighandler_t __dfsw_signal(int signum,
+                           void *(*handler_trampoline)(void *, int, dfsan_label,
+                                                       dfsan_label *),
+                           sighandler_t handler, dfsan_label signum_label,
+                           dfsan_label handler_label, dfsan_label *ret_label) {
+  CHECK_LT(signum, kMaxSignals);
+  SignalSpinLocker lock;
+  uptr old_cb = atomic_load(&sigactions[signum], memory_order_relaxed);
+  uptr cb = (uptr)handler;
+  if (cb != (uptr)SIG_IGN && cb != (uptr)SIG_DFL) {
+    atomic_store(&sigactions[signum], cb, memory_order_relaxed);
+    cb = (uptr)&SignalHandler;
+  }
+
+  sighandler_t ret = signal(signum, (sighandler_t)cb);
+
+  if (ret != SIG_ERR)
+    ret = (sighandler_t)old_cb;
+
+  *ret_label = 0;
+  return ret;
+}
+
 SANITIZER_INTERFACE_ATTRIBUTE
 int __dfsw_sigaltstack(const stack_t *ss, stack_t *old_ss, dfsan_label ss_label,
                        dfsan_label old_ss_label, dfsan_label *ret_label) {
diff --git a/compiler-rt/lib/dfsan/done_abilist.txt b/compiler-rt/lib/dfsan/done_abilist.txt
--- a/compiler-rt/lib/dfsan/done_abilist.txt
+++ b/compiler-rt/lib/dfsan/done_abilist.txt
@@ -252,6 +252,7 @@
 fun:select=custom
 fun:sigemptyset=custom
 fun:sigaction=custom
+fun:signal=custom
 fun:gettimeofday=custom
 
 # sprintf-like
diff --git a/compiler-rt/test/dfsan/custom.cpp b/compiler-rt/test/dfsan/custom.cpp
--- a/compiler-rt/test/dfsan/custom.cpp
+++ b/compiler-rt/test/dfsan/custom.cpp
@@ -842,6 +842,19 @@
   assert(oldact.sa_handler == SignalHandler);
 }
 
+void test_signal() {
+  // Set signal to be SignalHandler, save the previous one into
+  // old_signal_handler.
+  sighandler_t old_signal_handler = signal(SIGHUP, SignalHandler);
+  ASSERT_ZERO_LABEL(old_signal_handler);
+
+  // Set signal and check the previous one is SignalHandler.
+  assert(SignalHandler == signal(SIGHUP, SIG_DFL));
+
+  // Restore signal to old_signal_handler.
+  assert(SignalHandler == signal(SIGHUP, old_signal_handler));
+}
+
 void test_sigaltstack() {
   stack_t old_altstack = {};
   dfsan_set_label(j_label, &old_altstack, sizeof(old_altstack));
@@ -1311,6 +1324,7 @@
   test_sched_getaffinity();
   test_select();
   test_sigaction();
+  test_signal();
   test_sigaltstack();
   test_sigemptyset();
   test_snprintf();