8016538: volatile double access via Unsafe.cpp is not atomic

Summary: volatile jdouble load/store is not atomic, fix by using of existing volatile jlong operations which are atomic for jdouble.
Reviewed-by: kvn, vladidan, jrose
Contributed-by: david.holmes@oracle.com

src/os_cpu/bsd_x86/vm/orderAccess_bsd_x86.inline.hpp

@@ -72,7 +72,7 @@ inline jushort  OrderAccess::load_acquire(volatile jushort* p) { return *p; }
 inline juint    OrderAccess::load_acquire(volatile juint*   p) { return *p; }
 inline julong   OrderAccess::load_acquire(volatile julong*  p) { return Atomic::load((volatile jlong*)p); }
 inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { return *p; }
-inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
+inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return jdouble_cast(Atomic::load((volatile jlong*)p)); }
 
 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) { return *p; }
 inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) { return *(void* volatile *)p; }
@@ -87,7 +87,7 @@ inline void     OrderAccess::release_store(volatile jushort* p, jushort v) { *p
 inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { *p = v; }
 inline void     OrderAccess::release_store(volatile julong*  p, julong  v) { Atomic::store((jlong)v, (volatile jlong*)p); }
 inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { *p = v; }
-inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
+inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { release_store((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
 inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v) { *(void* volatile *)p = v; }
@@ -190,7 +190,7 @@ inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v)
 inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store_fence((volatile jlong*)p,  (jlong)v);  }
 
 inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { *p = v; fence(); }
-inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
+inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store_fence((volatile jlong*)p, jdouble_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) {
 #ifdef AMD64

src/os_cpu/linux_x86/vm/orderAccess_linux_x86.inline.hpp

@@ -72,7 +72,7 @@ inline jushort  OrderAccess::load_acquire(volatile jushort* p) { return *p; }
 inline juint    OrderAccess::load_acquire(volatile juint*   p) { return *p; }
 inline julong   OrderAccess::load_acquire(volatile julong*  p) { return Atomic::load((volatile jlong*)p); }
 inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { return *p; }
-inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
+inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return jdouble_cast(Atomic::load((volatile jlong*)p)); }
 
 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) { return *p; }
 inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) { return *(void* volatile *)p; }
@@ -87,7 +87,7 @@ inline void     OrderAccess::release_store(volatile jushort* p, jushort v) { *p
 inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { *p = v; }
 inline void     OrderAccess::release_store(volatile julong*  p, julong  v) { Atomic::store((jlong)v, (volatile jlong*)p); }
 inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { *p = v; }
-inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
+inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { release_store((volatile jlong *)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
 inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v) { *(void* volatile *)p = v; }
@@ -129,7 +129,7 @@ inline void     OrderAccess::store_fence(jushort* p, jushort v) { store_fence((j
 inline void     OrderAccess::store_fence(juint*   p, juint   v) { store_fence((jint*)p,   (jint)v);   }
 inline void     OrderAccess::store_fence(julong*  p, julong  v) { store_fence((jlong*)p,  (jlong)v);  }
 inline void     OrderAccess::store_fence(jfloat*  p, jfloat  v) { *p = v; fence(); }
-inline void     OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); }
+inline void     OrderAccess::store_fence(jdouble* p, jdouble v) { store_fence((jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) {
 #ifdef AMD64
@@ -190,7 +190,7 @@ inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v)
 inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store_fence((volatile jlong*)p,  (jlong)v);  }
 
 inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { *p = v; fence(); }
-inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
+inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store_fence((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) {
 #ifdef AMD64

src/os_cpu/solaris_x86/vm/orderAccess_solaris_x86.inline.hpp

@@ -88,7 +88,7 @@ inline jushort  OrderAccess::load_acquire(volatile jushort* p) { return *p; }
 inline juint    OrderAccess::load_acquire(volatile juint*   p) { return *p; }
 inline julong   OrderAccess::load_acquire(volatile julong*  p) { return Atomic::load((volatile jlong*)p); }
 inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { return *p; }
-inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
+inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return jdouble_cast(Atomic::load((volatile jlong*)p)); }
 
 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) { return *p; }
 inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) { return *(void* volatile *)p; }
@@ -103,7 +103,7 @@ inline void     OrderAccess::release_store(volatile jushort* p, jushort v) { *p
 inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { *p = v; }
 inline void     OrderAccess::release_store(volatile julong*  p, julong  v) { Atomic::store((jlong)v, (volatile jlong*)p); }
 inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { *p = v; }
-inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
+inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { release_store((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
 inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v) { *(void* volatile *)p = v; }
@@ -129,9 +129,9 @@ inline void     OrderAccess::release_store_fence(volatile jlong*   p, jlong   v)
 inline void     OrderAccess::release_store_fence(volatile jubyte*  p, jubyte  v) { *p = v; fence(); }
 inline void     OrderAccess::release_store_fence(volatile jushort* p, jushort v) { *p = v; fence(); }
 inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v) { *p = v; fence(); }
-inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store(p, v); fence(); }
+inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store((jlong *)p, (jlong)v); fence(); }
 inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { *p = v; fence(); }
-inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
+inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store_fence((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { *p = v; fence(); }
 inline void     OrderAccess::release_store_ptr_fence(volatile void*     p, void*    v) { *(void* volatile *)p = v; fence(); }

src/os_cpu/windows_x86/vm/orderAccess_windows_x86.inline.hpp

@@ -71,7 +71,7 @@ inline jushort  OrderAccess::load_acquire(volatile jushort* p) { return *p; }
 inline juint    OrderAccess::load_acquire(volatile juint*   p) { return *p; }
 inline julong   OrderAccess::load_acquire(volatile julong*  p) { return Atomic::load((volatile jlong*)p); }
 inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { return *p; }
-inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return *p; }
+inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) { return jdouble_cast(Atomic::load((volatile jlong*)p)); }
 
 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) { return *p; }
 inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) { return *(void* volatile *)p; }
@@ -86,7 +86,7 @@ inline void     OrderAccess::release_store(volatile jushort* p, jushort v) { *p
 inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { *p = v; }
 inline void     OrderAccess::release_store(volatile julong*  p, julong  v) { Atomic::store((jlong)v, (volatile jlong*)p); }
 inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { *p = v; }
-inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { *p = v; }
+inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v) { release_store((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; }
 inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v) { *(void* volatile *)p = v; }
@@ -195,7 +195,7 @@ inline void     OrderAccess::release_store_fence(volatile jushort* p, jushort v)
 inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v) { release_store_fence((volatile jint*)p,   (jint)v);   }
 inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store_fence((volatile jlong*)p,  (jlong)v);  }
 inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { *p = v; fence(); }
-inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { *p = v; fence(); }
+inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store_fence((volatile jlong*)p, jlong_cast(v)); }
 
 inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) {
 #ifdef AMD64