More PNaCL fixes.

src/sampler.cc

Index: src/sampler.cc
diff --git a/src/sampler.cc b/src/sampler.cc
index 29fe27fd35866ffe62e26105fadbe728bfdc7666..394efeb7640764870b6f768a9d11a1b879955416 100644
--- a/src/sampler.cc
+++ b/src/sampler.cc
@@ -13,7 +13,7 @@
 #include <signal.h>
 #include <sys/time.h>
 
-#if !V8_OS_QNX
+#if !V8_OS_QNX && !V8_OS_NACL
 #include <sys/syscall.h>  // NOLINT
 #endif
 
@@ -21,8 +21,8 @@
 #include <mach/mach.h>
 // OpenBSD doesn't have <ucontext.h>. ucontext_t lives in <signal.h>
 // and is a typedef for struct sigcontext. There is no uc_mcontext.
-#elif(!V8_OS_ANDROID || defined(__BIONIC_HAVE_UCONTEXT_T)) \
-    && !V8_OS_OPENBSD
+#elif(!V8_OS_ANDROID || defined(__BIONIC_HAVE_UCONTEXT_T)) && \
+    !V8_OS_OPENBSD && !V8_OS_NACL
 #include <ucontext.h>
 #endif
 
@@ -294,6 +294,7 @@ class SignalHandler : public AllStatic {
 
  private:
   static void Install() {
+#if !V8_OS_NACL
     struct sigaction sa;
     sa.sa_sigaction = &HandleProfilerSignal;
     sigemptyset(&sa.sa_mask);
@@ -304,16 +305,21 @@ class SignalHandler : public AllStatic {
 #endif
     signal_handler_installed_ =
         (sigaction(SIGPROF, &sa, &old_signal_handler_) == 0);
+#endif
   }
 
   static void Restore() {
+#if !V8_OS_NACL
     if (signal_handler_installed_) {
       sigaction(SIGPROF, &old_signal_handler_, 0);
       signal_handler_installed_ = false;
     }
+#endif
   }
 
+#if !V8_OS_NACL
   static void HandleProfilerSignal(int signal, siginfo_t* info, void* context);
+#endif
   // Protects the process wide state below.
   static base::Mutex* mutex_;
   static int client_count_;
@@ -328,13 +334,10 @@ struct sigaction SignalHandler::old_signal_handler_;
 bool SignalHandler::signal_handler_installed_ = false;
 
 
+// As Native Client does not support signal handling, profiling is disabled.
+#if !V8_OS_NACL
 void SignalHandler::HandleProfilerSignal(int signal, siginfo_t* info,
                                          void* context) {
-#if V8_OS_NACL
-  // As Native Client does not support signal handling, profiling
-  // is disabled.
-  return;
-#else
   USE(info);
   if (signal != SIGPROF) return;
   Isolate* isolate = Isolate::UnsafeCurrent();
@@ -477,8 +480,8 @@ void SignalHandler::HandleProfilerSignal(int signal, siginfo_t* info,
 #endif  // V8_OS_QNX
 #endif  // USE_SIMULATOR
   sampler->SampleStack(state);
-#endif  // V8_OS_NACL
 }
+#endif  // V8_OS_NACL
 
 #endif