Add support for the QNX operating system.

src/platform-posix.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 112 matching lines @@
   }
   return static_cast<uint64_t>(pages) * page_size;
 #elif V8_OS_CYGWIN
   MEMORYSTATUS memory_info;
   memory_info.dwLength = sizeof(memory_info);
   if (!GlobalMemoryStatus(&memory_info)) {
     UNREACHABLE();
     return 0;
   }
   return static_cast<uint64_t>(memory_info.dwTotalPhys);
+#elif V8_OS_QNX
+  struct stat stat_buf;
+  if (stat("/proc", &stat_buf) != 0) {
+    UNREACHABLE();
+    return 0;
+  }
+  return static_cast<uint64_t>(stat_buf.st_size);
 #else
   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<uint64_t>(pages) * page_size;
 #endif
 }
@@ skipping 97 matching lines @@
     raw_addr += 0x20000000;
 # endif
 #endif
     return reinterpret_cast<void*>(raw_addr);
   }
   return NULL;
 }
 
 
 size_t OS::AllocateAlignment() {
+#if defined(V8_OS_QNX)

[Benedikt Meurer, 2013/11/15 11:49:59]

Use #if V8_OS_QNX.

[c.truta, 2013/11/18 13:36:32]

D'oh! Oversight. Thank you.
I also added #if V8_OS_LINUX || ... because I noticed that, in Linux, it is
recommended to use sysconf instead of getpagesize, just as in QNX.

[Benedikt Meurer, 2013/11/19 07:01:27]

sysconf(_SC_PAGESIZE) just calls getpagesize() for glibc, ulibc and bionic, so
there's no reason add special case for Linux here. What is the reason to use
sysconf() on QNX?

+  return static_cast<size_t>(sysconf(_SC_PAGESIZE));
+#else
   return getpagesize();
+#endif
 }
 
 
 void OS::Sleep(int milliseconds) {
   useconds_t ms = static_cast<useconds_t>(milliseconds);
   usleep(1000 * ms);
 }
 
 
 void OS::Abort() {
@@ skipping 513 matching lines @@
 
 void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
   pthread_key_t pthread_key = LocalKeyToPthreadKey(key);
   int result = pthread_setspecific(pthread_key, value);
   ASSERT_EQ(0, result);
   USE(result);
 }
 
 
 } }  // namespace v8::internal