Sampling profiler

runtime/vm/signal_handler.h

+// 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 VM_SIGNAL_HANDLER_H_
+#define VM_SIGNAL_HANDLER_H_
+
+#include "vm/allocation.h"
+#include "vm/globals.h"
+
+#if defined(TARGET_OS_LINUX)
+#include <signal.h>  // NOLINT
+#include <ucontext.h>  // NOLINT
+#elif defined(TARGET_OS_ANDROID)
+#include <signal.h>  // NOLINT
+#include <ucontext.h>  // NOLINT
+#elif defined(TARGET_OS_MACOS)
+#include <signal.h>  // NOLINT
+#include <sys/ucontext.h>  // NOLINT
+#elif defined(TARGET_OS_WINDOWS)
+// Stub out for windows.
+struct siginfo_t;
+struct mcontext_t;
+struct sigset_t {
+};
+#endif
+
+namespace dart {
+
+typedef void (*SignalAction)(int signal, siginfo_t* info,
+                             void* context);
+
+class SignalHandler : public AllStatic {
+ public:
+  static void Install(SignalAction action);
+  static uintptr_t GetProgramCounter(const mcontext_t& mcontext);
+  static uintptr_t GetFramePointer(const mcontext_t& mcontext);
+  static uintptr_t GetStackPointer(const mcontext_t& mcontext);
+ private:
+};
+
+
+class ScopedSignalBlocker {
+ public:
+  ScopedSignalBlocker();
+  ~ScopedSignalBlocker();
+
+ private:
+  sigset_t old_;
+};
+
+
+}  // namespace dart
+
+#endif  // VM_SIGNAL_HANDLER_H_