Add methods to enable configuration of ResourceConstraints based on limits derived at runtime.

src/platform-solaris.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 155 matching lines @@
 
 
 void OS::LogSharedLibraryAddresses(Isolate* isolate) {
 }
 
 
 void OS::SignalCodeMovingGC() {
 }
 
 
+uintptr_t OS::TotalPhysicalMemory() {
+  intptr_t pages = sysconf(_SC_PHYS_PAGES);
+  intptr_t page_size = sysconf(_SC_PAGESIZE);
+  if (pages == -1 || page_size == -1) {
+    UNREACHABLE();
+    return 0;
+  }
+  return static_cast<uintptr_t>(pages) * page_size;
+}
+
+
 struct StackWalker {
   Vector<OS::StackFrame>& frames;
   int index;
 };
 
 
 static int StackWalkCallback(uintptr_t pc, int signo, void* data) {
   struct StackWalker* walker = static_cast<struct StackWalker*>(data);
   Dl_info info;
 
@@ skipping 155 matching lines @@
   return munmap(base, size) == 0;
 }
 
 
 bool VirtualMemory::HasLazyCommits() {
   // TODO(alph): implement for the platform.
   return false;
 }
 
 } }  // namespace v8::internal