8370207: Test sun/misc/SunMiscSignalTest.java crashes after JDK-8369631

Reviewed-by: kbarrett, coleenp

Author: David Holmes

src/hotspot/os/posix/signals_posix.cpp

@@ -357,12 +357,12 @@ static void jdk_misc_signal_init() {
 }
 
 void os::signal_notify(int sig) {
-    // Signal thread is not created with ReduceSignalUsage and jdk_misc_signal_init
-    // initialization isn't called. This code is also never called.
-    assert(!ReduceSignalUsage, "Should not reach here if ReduceSignalUsage is set");
-
+  // Signal thread is not created with ReduceSignalUsage and jdk_misc_signal_init
+  // initialization isn't called.
+  if (!ReduceSignalUsage) {
     AtomicAccess::inc(&pending_signals[sig]);
     sig_semaphore->signal();
+  }
 }
 
 static int check_pending_signals() {

test/jdk/ProblemList.txt

@@ -743,8 +743,6 @@ sun/tools/jstatd/TestJstatdRmiPort.java                         8251259,8293577
 jdk/incubator/vector/ShortMaxVectorTests.java                   8306592 generic-i586
 jdk/incubator/vector/LoadJsvmlTest.java                         8305390 windows-x64
 
-sun/misc/SunMiscSignalTest.java                                 8370207 generic-all
-
 ############################################################################
 
 # jdk_jfr