src/hotspot/share/prims/unsafe.cpp

rev 54327 : 8221477: Inject os/cpu-specific constants into Unsafe from JVM
Summary: Initialize Unsafe os/cpu-specific constants using injection instead of native callouts
Reviewed-by: stuefe

*** 289,310 ****
  UNSAFE_ENTRY(jobject, Unsafe_GetUncompressedObject(JNIEnv *env, jobject unsafe, jlong addr)) {
    oop v = *(oop*) (address) addr;
    return JNIHandles::make_local(env, v);
  } UNSAFE_END
  
- UNSAFE_LEAF(jboolean, Unsafe_isBigEndian0(JNIEnv *env, jobject unsafe)) {
- #ifdef VM_LITTLE_ENDIAN
-   return false;
- #else
-   return true;
- #endif
- } UNSAFE_END
- 
- UNSAFE_LEAF(jint, Unsafe_unalignedAccess0(JNIEnv *env, jobject unsafe)) {
-   return UseUnalignedAccesses;
- } UNSAFE_END
- 
  #define DEFINE_GETSETOOP(java_type, Type) \
   \
  UNSAFE_ENTRY(java_type, Unsafe_Get##Type(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) { \
    return MemoryAccess<java_type>(thread, obj, offset).get(); \
  } UNSAFE_END \
--- 289,298 ----
*** 443,460 ****
    }
  } UNSAFE_END
  
  ////// Random queries
  
- UNSAFE_LEAF(jint, Unsafe_AddressSize0(JNIEnv *env, jobject unsafe)) {
-   return sizeof(void*);
- } UNSAFE_END
- 
- UNSAFE_LEAF(jint, Unsafe_PageSize()) {
-   return os::vm_page_size();
- } UNSAFE_END
- 
  static jlong find_field_offset(jclass clazz, jstring name, TRAPS) {
    assert(clazz != NULL, "clazz must not be NULL");
    assert(name != NULL, "name must not be NULL");
  
    ResourceMark rm(THREAD);
--- 431,440 ----
*** 1070,1081 ****
      {CC "staticFieldOffset0", CC "(" FLD ")J",           FN_PTR(Unsafe_StaticFieldOffset0)},
      {CC "staticFieldBase0",   CC "(" FLD ")" OBJ,        FN_PTR(Unsafe_StaticFieldBase0)},
      {CC "ensureClassInitialized0", CC "(" CLS ")V",      FN_PTR(Unsafe_EnsureClassInitialized0)},
      {CC "arrayBaseOffset0",   CC "(" CLS ")I",           FN_PTR(Unsafe_ArrayBaseOffset0)},
      {CC "arrayIndexScale0",   CC "(" CLS ")I",           FN_PTR(Unsafe_ArrayIndexScale0)},
-     {CC "addressSize0",       CC "()I",                  FN_PTR(Unsafe_AddressSize0)},
-     {CC "pageSize",           CC "()I",                  FN_PTR(Unsafe_PageSize)},
  
      {CC "defineClass0",       CC "(" DC_Args ")" CLS,    FN_PTR(Unsafe_DefineClass0)},
      {CC "allocateInstance",   CC "(" CLS ")" OBJ,        FN_PTR(Unsafe_AllocateInstance)},
      {CC "throwException",     CC "(" THR ")V",           FN_PTR(Unsafe_ThrowException)},
      {CC "compareAndSetReference",CC "(" OBJ "J" OBJ "" OBJ ")Z", FN_PTR(Unsafe_CompareAndSetReference)},
--- 1050,1059 ----
*** 1099,1111 ****
      {CC "shouldBeInitialized0", CC "(" CLS ")Z",         FN_PTR(Unsafe_ShouldBeInitialized0)},
  
      {CC "loadFence",          CC "()V",                  FN_PTR(Unsafe_LoadFence)},
      {CC "storeFence",         CC "()V",                  FN_PTR(Unsafe_StoreFence)},
      {CC "fullFence",          CC "()V",                  FN_PTR(Unsafe_FullFence)},
- 
-     {CC "isBigEndian0",       CC "()Z",                  FN_PTR(Unsafe_isBigEndian0)},
-     {CC "unalignedAccess0",   CC "()Z",                  FN_PTR(Unsafe_unalignedAccess0)}
  };
  
  #undef CC
  #undef FN_PTR
  
--- 1077,1086 ----