deps: fix V8 8.3 on SmartOS

Author: cjihrig

deps/v8/src/base/platform/platform-posix.cc

@@ -970,7 +970,7 @@ void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
 // pthread_getattr_np used below is non portable (hence the _np suffix). We
 // keep this version in POSIX as most Linux-compatible derivatives will
 // support it. MacOS and FreeBSD are different here.
-#if !defined(V8_OS_FREEBSD) && !defined(V8_OS_MACOSX)
+#if !defined(V8_OS_FREEBSD) && !defined(V8_OS_MACOSX) && !defined(V8_OS_SOLARIS)
 
 // static
 void* Stack::GetStackStart() {
@@ -996,7 +996,7 @@ void* Stack::GetStackStart() {
   return nullptr;
 }
 
-#endif  // !defined(V8_OS_FREEBSD) && !defined(V8_OS_MACOSX)
+#endif  // !defined(V8_OS_FREEBSD) && !defined(V8_OS_MACOSX) && !defined(V8_OS_SOLARIS)
 
 // static
 void* Stack::GetCurrentStackPosition() { return __builtin_frame_address(0); }

deps/v8/src/base/platform/platform-solaris.cc

@@ -65,5 +65,23 @@ void OS::SignalCodeMovingGC() {}
 
 void OS::AdjustSchedulingParams() {}
 
+// static
+void* Stack::GetStackStart() {
+  pthread_attr_t attr;
+  int error;
+  pthread_attr_init(&attr);
+  error = pthread_attr_get_np(pthread_self(), &attr);
+  if (!error) {
+    void* base;
+    size_t size;
+    error = pthread_attr_getstack(&attr, &base, &size);
+    CHECK(!error);
+    pthread_attr_destroy(&attr);
+    return reinterpret_cast<uint8_t*>(base) + size;
+  }
+  pthread_attr_destroy(&attr);
+  return nullptr;
+}
+
 }  // namespace base
 }  // namespace v8