1 files changed, 87 insertions, 0 deletions
diff --git a/lib/sanitizer_common/sanitizer_signal_interceptors.inc b/lib/sanitizer_common/sanitizer_signal_interceptors.inc
new file mode 100644
index 000000000000..f51fc049e327
--- /dev/null
+++ b/lib/sanitizer_common/sanitizer_signal_interceptors.inc
@@ -0,0 +1,87 @@
+//===-- sanitizer_signal_interceptors.inc -----------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Signal interceptors for sanitizers.
+//
+//===----------------------------------------------------------------------===//
+
+#include "interception/interception.h"
+#include "sanitizer_common.h"
+#include "sanitizer_internal_defs.h"
+#include "sanitizer_platform_interceptors.h"
+
+using namespace __sanitizer;
+
+#if SANITIZER_NETBSD
+#define sigaction_symname __sigaction14
+#else
+#define sigaction_symname sigaction
+#endif
+
+#ifndef SIGNAL_INTERCEPTOR_SIGNAL_IMPL
+#define SIGNAL_INTERCEPTOR_SIGNAL_IMPL(func, signum, handler) \
+  { return REAL(func)(signum, handler); }
+#endif
+
+#ifndef SIGNAL_INTERCEPTOR_SIGACTION_IMPL
+#define SIGNAL_INTERCEPTOR_SIGACTION_IMPL(signum, act, oldact) \
+  { return REAL(sigaction_symname)(signum, act, oldact); }
+#endif
+
+#if SANITIZER_INTERCEPT_BSD_SIGNAL
+INTERCEPTOR(uptr, bsd_signal, int signum, uptr handler) {
+  if (GetHandleSignalMode(signum) == kHandleSignalExclusive) return 0;
+  SIGNAL_INTERCEPTOR_SIGNAL_IMPL(bsd_signal, signum, handler);
+}
+#define INIT_BSD_SIGNAL COMMON_INTERCEPT_FUNCTION(bsd_signal)
+#else  // SANITIZER_INTERCEPT_BSD_SIGNAL
+#define INIT_BSD_SIGNAL
+#endif  // SANITIZER_INTERCEPT_BSD_SIGNAL
+
+#if SANITIZER_INTERCEPT_SIGNAL_AND_SIGACTION
+INTERCEPTOR(uptr, signal, int signum, uptr handler) {
+  if (GetHandleSignalMode(signum) == kHandleSignalExclusive)
+    return (uptr) nullptr;
+  SIGNAL_INTERCEPTOR_SIGNAL_IMPL(signal, signum, handler);
+}
+#define INIT_SIGNAL COMMON_INTERCEPT_FUNCTION(signal)
+
+INTERCEPTOR(int, sigaction_symname, int signum,
+            const __sanitizer_sigaction *act, __sanitizer_sigaction *oldact) {
+  if (GetHandleSignalMode(signum) == kHandleSignalExclusive) return 0;
+  SIGNAL_INTERCEPTOR_SIGACTION_IMPL(signum, act, oldact);
+}
+#define INIT_SIGACTION COMMON_INTERCEPT_FUNCTION(sigaction_symname)
+
+namespace __sanitizer {
+int real_sigaction(int signum, const void *act, void *oldact) {
+  return REAL(sigaction_symname)(signum, (const __sanitizer_sigaction *)act,
+                         (__sanitizer_sigaction *)oldact);
+}
+}  // namespace __sanitizer
+#else  // SANITIZER_INTERCEPT_SIGNAL_AND_SIGACTION
+#define INIT_SIGNAL
+#define INIT_SIGACTION
+// We need to have defined REAL(sigaction) on other systems.
+namespace __sanitizer {
+struct __sanitizer_sigaction;
+}
+DEFINE_REAL(int, sigaction, int signum, const __sanitizer_sigaction *act,
+            __sanitizer_sigaction *oldact)
+#endif  // SANITIZER_INTERCEPT_SIGNAL_AND_SIGACTION
+
+static void InitializeSignalInterceptors() {
+  static bool was_called_once;
+  CHECK(!was_called_once);
+  was_called_once = true;
+
+  INIT_BSD_SIGNAL;
+  INIT_SIGNAL;
+  INIT_SIGACTION;
+}