Fuchsia: Initial check-in.

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"
 
@@ skipping 16 matching lines @@
 #endif  // !defined(__BIONIC_HAVE_UCONTEXT_T)
 #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 {
 };
+#elif defined(TARGET_OS_FUCHSIA)
+#include <signal.h>  // NOLINT
+#include <ucontext.h>  // NOLINT
 #endif
 
 
 // Old linux kernels on ARM might require a trampoline to
 // work around incorrect Thumb -> ARM transitions. See SignalHandlerTrampoline
 // below for more details.
 #if defined(HOST_ARCH_ARM) && \
     (defined(TARGET_OS_LINUX) || defined(TARGET_OS_ANDROID)) && \
     !defined(__thumb__)
 #define USE_SIGNAL_HANDLER_TRAMPOLINE
@@ skipping 30 matching lines @@
   //
   // Kernel does not clear If-Then execution state bits when entering ARM signal
   // handler which violates requirements imposed by ARM architecture reference.
   // Some CPUs look at these bits even while in ARM mode which causes them
   // to skip some instructions in the prologue of the signal handler.
   //
   // To work around the issue we insert enough NOPs in the prologue to ensure
   // that no actual instructions are skipped and then branch to the actual
   // signal handler.
   //
-  // For the kernel patch that fixes the issue see: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6ecf830e5029598732e04067e325d946097519cb
+  // For the kernel patch that fixes the issue see:
+  // http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6ecf830e5029598732e04067e325d946097519cb
   //
   // Note: this function is marked "naked" because we must guarantee that
   // our NOPs occur before any compiler generated prologue.
   template <SignalAction action>
   static __attribute__((naked)) void SignalHandlerTrampoline(int signal,
                                                              siginfo_t* info,
                                                              void* context_) {
     // IT (If-Then) instruction makes up to four instructions that follow it
     // conditional.
     asm volatile("nop; nop; nop; nop" : : : "memory");
@@ skipping 14 matching lines @@
 #endif  // defined(USE_SIGNAL_HANDLER_TRAMPOLINE)
 };
 
 
 #undef USE_SIGNAL_HANDLER_TRAMPOLINE
 
 
 }  // namespace dart
 
 #endif  // VM_SIGNAL_HANDLER_H_