Mercurial > hg > graal-jvmci-8

diff src/os_cpu/linux_x86/vm/threadLS_linux_x86.hpp @ 3798:65dba8692db7
7061197: ThreadLocalStorage sp map table should be optional Reviewed-by: dholmes, never, jwilhelm, kvn
author: jcoomes
date: Wed, 06 Jul 2011 12:22:29 -0700
parents: f95d63e2154a
--- a/src/os_cpu/linux_x86/vm/threadLS_linux_x86.hpp	Wed Jul 06 12:17:44 2011 -0700
+++ b/src/os_cpu/linux_x86/vm/threadLS_linux_x86.hpp	Wed Jul 06 12:22:29 2011 -0700
@@ -27,28 +27,32 @@
 
   // Processor dependent parts of ThreadLocalStorage
 
-#ifndef AMD64
+#if !defined(AMD64) && !defined(MINIMIZE_RAM_USAGE)
+
   // map stack pointer to thread pointer - see notes in threadLS_linux_x86.cpp
   #define SP_BITLENGTH  32
   #define PAGE_SHIFT    12
   #define PAGE_SIZE     (1UL << PAGE_SHIFT)
   static Thread* _sp_map[1UL << (SP_BITLENGTH - PAGE_SHIFT)];
-#endif // !AMD64
 
 public:
 
-#ifndef AMD64
   static Thread** sp_map_addr() { return _sp_map; }
-#endif // !AMD64
 
   static Thread* thread() {
-#ifdef AMD64
-    return (Thread*) os::thread_local_storage_at(thread_index());
-#else
     uintptr_t sp;
     __asm__ volatile ("movl %%esp, %0" : "=r" (sp));
     return _sp_map[sp >> PAGE_SHIFT];
-#endif // AMD64
   }
 
+#else
+
+public:
+
+   static Thread* thread() {
+     return (Thread*) os::thread_local_storage_at(thread_index());
+   }
+
+#endif // AMD64 || MINIMIZE_RAM_USAGE
+
 #endif // OS_CPU_LINUX_X86_VM_THREADLS_LINUX_X86_HPP