S390: Initial test changes and files checkin.

test/cctest/test-lockers.cc

Index: test/cctest/test-lockers.cc
diff --git a/test/cctest/test-lockers.cc b/test/cctest/test-lockers.cc
index 385366aa24da0cfb9bf4039b65bce522659792ec..f12ca87fa617385160235337a9b9169612a476e0 100644
--- a/test/cctest/test-lockers.cc
+++ b/test/cctest/test-lockers.cc
@@ -298,7 +298,7 @@ class SeparateIsolatesLocksNonexclusiveThread : public JoinableThread {
 // Run parallel threads that lock and access different isolates in parallel
 TEST(SeparateIsolatesLocksNonexclusive) {
   i::FLAG_always_opt = false;
-#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS
+#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_S390
   const int kNThreads = 50;
 #else
   const int kNThreads = 100;
@@ -382,7 +382,7 @@ class LockerUnlockerThread : public JoinableThread {
 // Use unlocker inside of a Locker, multiple threads.
 TEST(LockerUnlocker) {
   i::FLAG_always_opt = false;
-#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS
+#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_S390
   const int kNThreads = 50;
 #else
   const int kNThreads = 100;
@@ -439,7 +439,7 @@ class LockTwiceAndUnlockThread : public JoinableThread {
 // Use Unlocker inside two Lockers.
 TEST(LockTwiceAndUnlock) {
   i::FLAG_always_opt = false;
-#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS
+#if V8_TARGET_ARCH_ARM || V8_TARGET_ARCH_MIPS || V8_TARGET_ARCH_S390
   const int kNThreads = 50;
 #else
   const int kNThreads = 100;
@@ -710,6 +710,8 @@ TEST(ExtensionsRegistration) {
   const int kNThreads = 10;
 #elif V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_32_BIT
   const int kNThreads = 4;
+#elif V8_TARGET_ARCH_S390 && V8_TARGET_ARCH_32_BIT
+  const int kNThreads = 10;
 #else
   const int kNThreads = 40;
 #endif