--- a/hotspot/src/os/solaris/vm/os_solaris.cpp	Sat Nov 14 18:26:35 2015 +0000
+++ b/hotspot/src/os/solaris/vm/os_solaris.cpp	Mon Nov 16 14:47:21 2015 -0500
@@ -997,9 +997,8 @@
 }
 
 // defined for >= Solaris 10. This allows builds on earlier versions
-// of Solaris to take advantage of the newly reserved Solaris JVM signals
-// With SIGJVM1, SIGJVM2, ASYNC_SIGNAL is SIGJVM2 and -XX:+UseAltSigs does
-// nothing since these should have no conflict. Previously INTERRUPT_SIGNAL
+// of Solaris to take advantage of the newly reserved Solaris JVM signals.
+// With SIGJVM1, SIGJVM2, ASYNC_SIGNAL is SIGJVM2. Previously INTERRUPT_SIGNAL
 // was SIGJVM1.
 //
 #if !defined(SIGJVM1)
@@ -1053,13 +1052,9 @@
   sigaddset(&unblocked_sigs, SIGBUS);
   sigaddset(&unblocked_sigs, SIGFPE);
 
-  if (isJVM1available) {
-    os::Solaris::set_SIGasync(SIGJVM2);
-  } else if (UseAltSigs) {
-    os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL);
-  } else {
-    os::Solaris::set_SIGasync(ASYNC_SIGNAL);
-  }
+  // Always true on Solaris 10+
+  guarantee(isJVM1available(), "SIGJVM1/2 missing!");
+  os::Solaris::set_SIGasync(SIGJVM2);
 
   sigaddset(&unblocked_sigs, os::Solaris::SIGasync());
 
@@ -3922,7 +3917,7 @@
         // save the old handler in jvm
         save_preinstalled_handler(sig, oldAct);
       } else {
-        vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs.");
+        vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal.");
       }
       // libjsig also interposes the sigaction() call below and saves the
       // old sigaction on it own.
@@ -3991,7 +3986,7 @@
     DO_SIGNAL_CHECK(BREAK_SIGNAL);
   }
 
-  // See comments above for using JVM1/JVM2 and UseAltSigs
+  // See comments above for using JVM1/JVM2
   DO_SIGNAL_CHECK(os::Solaris::SIGasync());
 
 }