RFR: 8207851: Implement JEP 352

[Gustavo Romero]

Hi Andrew,

On 05/24/2019 07:06 AM, Andrew Dinn wrote:
> Ping!
> 
> Any takers for a review?

I found some trailing space in v5 and it seems they are in v6 as well.

You might want to check the followings:

src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp
+    // data cache line writeback
+    StubRoutines::_data_cache_writeback = generate_data_cache_writeback();
+    StubRoutines::_data_cache_writeback_sync = generate_data_cache_writeback_sync();
+  <-- here


src/hotspot/cpu/aarch64/vm_version_aarch64.cpp
+    if (_dcpop || UsePOCForPOP) {
+      _data_cache_line_flush_size = dcache_line;
+    }
+  }
+  <-- here


src/hotspot/cpu/x86/macroAssembler_x86.cpp
+    // no need for fence when using CLFLUSH
+    clflush(line);
+  }   <-- here


src/hotspot/cpu/x86/stubGenerator_x86_64.cpp
in generate_data_cache_writeback():
+    __ ret(0);
+
+    return start;    <-- here

in generate_data_cache_writeback_sync():
+    __ jcc(Assembler::notEqual, skip); <-- here

and
+    // data cache line writeback
+    StubRoutines::_data_cache_writeback = generate_data_cache_writeback();
+    StubRoutines::_data_cache_writeback_sync = generate_data_cache_writeback_sync();
+    <-- here (like in aarch64 file)


src/java.base/share/classes/java/nio/MappedByteBuffer.java
+    private final boolean isSync;
+    <-- here

and
+    private boolean isSync() {
+        return isSync;
+    }
+    <-- here


src/java.base/share/classes/jdk/internal/misc/Unsafe.java
+     *        that must be guaranteed written back to memory.
+     *        <-- here

and here:
+     * @since 13
+     */
+    <-- here

+        checkSize(length);
+    }
+    <-- here

+     * calling method {@link writeback #writeback} if it is disabled).
+     * <-- here

+            throw new RuntimeException("writebackMemory not enabled!");
+        }
+    }
+    <-- here

+    // following memory writes
+    @HotSpotIntrinsicCandidate
+    private native void writebackPostSync0();
+    <-- here


src/java.base/share/classes/sun/nio/ch/FileChannelImpl.java
+            incrementStats();
+        }
+        <-- here

                  totalCapacity -= cap;
              }
          }
      }
+    <-- here

+            super(address, size, cap, fd);
+            incrementStats();
+        }
+        <-- here

+                totalCapacity -= cap;
+            }
+        }
+    }
+    <-- here


src/java.base/unix/native/libnio/ch/FileChannelImpl.c
+    // should never be called with map_sync and prot == PRIVATE
+    assert((prot != sun_nio_ch_FileChannelImpl_MAP_PV) ||! map_sync);
+    <-- here

+#ifndef MAP_SHARED_VALIDATE
+#define MAP_SHARED_VALIDATE 0x03
+#endif
+    <-- here

test/jdk/java/nio/MappedByteBuffer/PmemTest.java
+import com.sun.nio.file.ExtendedMapMode;
+    <-- here

+    public static final int NUM_KBS = 16;
+    <-- here

Best regards,
Gustavo