Profiler Take 2

runtime/bin/signal_blocker.h

Index: runtime/bin/signal_blocker.h
diff --git a/runtime/bin/signal_blocker.h b/runtime/bin/signal_blocker.h
new file mode 100644
index 0000000000000000000000000000000000000000..d01e531ebcd24c7f64f6ee1c19a0700098b74679
--- /dev/null
+++ b/runtime/bin/signal_blocker.h
@@ -0,0 +1,41 @@
+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#ifndef BIN_SIGNAL_BLOCKER_H_
+#define BIN_SIGNAL_BLOCKER_H_
+
+#include "platform/globals.h"
+
+#if defined(TARGET_OS_WINDOWS)
+#error Do not include this file on Windows.
+#endif
+
+#include <signal.h>  // NOLINT
+
+namespace dart {
+namespace bin {
+
+class ThreadSignalBlocker {
+ public:
+  explicit ThreadSignalBlocker(int sig) {
+    sigset_t signal_mask;
+    sigemptyset(&signal_mask);
+    sigaddset(&signal_mask, sig);
+    // Add sig to signal mask.
+    pthread_sigmask(SIG_BLOCK, &signal_mask, &old);

[siva, 2013/12/13 21:29:14]

int result = pthread_sigmask(....);
ASSERT(!retval);

[Cutch, 2013/12/13 22:40:18]

Done.

+  }
+
+  ~ThreadSignalBlocker() {
+    // Restore signal mask.
+    pthread_sigmask(SIG_SETMASK, &old, NULL);

[siva, 2013/12/13 21:29:14]

Ditto here.

[Cutch, 2013/12/13 22:40:18]

Done.

+  }
+
+ private:
+  sigset_t old;
+};
+
+}  // namespace bin
+}  // namespace dart
+
+#endif  // BIN_SIGNAL_BLOCKER_H_