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src/hotspot/cpu/aarch64/icache_aarch64.hpp

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8248238: Adding Windows support to OpenJDK on AArch64

Summary: Adding Windows support for AArch64

Contributed-by: Ludovic Henry <luhenry@microsoft.com>, Monica Beckwith <monica.beckwith@microsoft.com>
Reviewed-by:


  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #ifndef CPU_AARCH64_ICACHE_AARCH64_HPP
  27 #define CPU_AARCH64_ICACHE_AARCH64_HPP
  28 
  29 // Interface for updating the instruction cache.  Whenever the VM
  30 // modifies code, part of the processor instruction cache potentially
  31 // has to be flushed.
  32 
  33 class ICache : public AbstractICache {









  34  public:
  35   static void initialize();
  36   static void invalidate_word(address addr) {
  37     __builtin___clear_cache((char *)addr, (char *)(addr + 3));
  38   }
  39   static void invalidate_range(address start, int nbytes) {
  40     __builtin___clear_cache((char *)start, (char *)(start + nbytes));
  41   }
  42 };
  43 
  44 #endif // CPU_AARCH64_ICACHE_AARCH64_HPP


  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  25 
  26 #ifndef CPU_AARCH64_ICACHE_AARCH64_HPP
  27 #define CPU_AARCH64_ICACHE_AARCH64_HPP
  28 
  29 // Interface for updating the instruction cache.  Whenever the VM
  30 // modifies code, part of the processor instruction cache potentially
  31 // has to be flushed.
  32 
  33 class ICache : public AbstractICache {
  34  private:
  35 #ifdef _WIN64
  36   // __builtin___clear_cache is a GCC intrinsic, and is then not available in
  37   // MSVC. Define an equivalent method which calls the right Win32/MSVC
  38   // intrinsic.
  39   static void __builtin___clear_cache(char *start, char *end) {
  40     FlushInstructionCache((HANDLE)GetCurrentProcess(), start, (SIZE_T)(end - start));
  41   }
  42 #endif
  43  public:
  44   static void initialize();
  45   static void invalidate_word(address addr) {
  46     __builtin___clear_cache((char *)addr, (char *)(addr + 3));
  47   }
  48   static void invalidate_range(address start, int nbytes) {
  49     __builtin___clear_cache((char *)start, (char *)(start + nbytes));
  50   }
  51 };
  52 
  53 #endif // CPU_AARCH64_ICACHE_AARCH64_HPP
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