BasicType FieldType::basic_type(symbolOop signature) {
return char2type(signature->byte_at(0));
}
void basic_types_init() {
#ifdef ASSERT
#ifdef _LP64
assert(min_intx == (intx)CONST64(0x8000000000000000), "correct constant");
assert(max_intx == CONST64(0x7FFFFFFFFFFFFFFF), "correct constant");
assert(max_uintx == CONST64(0xFFFFFFFFFFFFFFFF), "correct constant");
assert( 8 == sizeof( intx), "wrong size for basic type");
assert( 8 == sizeof( jobject), "wrong size for basic type");
#else
assert(min_intx == (intx)0x80000000, "correct constant");
assert(max_intx == 0x7FFFFFFF, "correct constant");
assert(max_uintx == 0xFFFFFFFF, "correct constant");
assert( 4 == sizeof( intx), "wrong size for basic type");
assert( 4 == sizeof( jobject), "wrong size for basic type");
#endif
assert( (~max_juint) == 0, "max_juint has all its bits");
assert( (~max_uintx) == 0, "max_uintx has all its bits");
assert( (~max_julong) == 0, "max_julong has all its bits");
assert( 1 == sizeof( jbyte), "wrong size for basic type");
assert( 2 == sizeof( jchar), "wrong size for basic type");
assert( 2 == sizeof( jshort), "wrong size for basic type");
assert( 4 == sizeof( juint), "wrong size for basic type");
assert( 4 == sizeof( jint), "wrong size for basic type");
assert( 1 == sizeof( jboolean), "wrong size for basic type");
assert( 8 == sizeof( jlong), "wrong size for basic type");
assert( 4 == sizeof( jfloat), "wrong size for basic type");
assert( 8 == sizeof( jdouble), "wrong size for basic type");
assert( 1 == sizeof( u1), "wrong size for basic type");
assert( 2 == sizeof( u2), "wrong size for basic type");
assert( 4 == sizeof( u4), "wrong size for basic type");
int num_type_chars = 0;
for (int i = 0; i < 99; i++) {
if (type2char((BasicType)i) != 0) {
assert(char2type(type2char((BasicType)i)) == i, "proper inverses");
num_type_chars++;
}
}
assert(num_type_chars == 11, "must have tested the right number of mappings");
assert(char2type(0) == T_ILLEGAL, "correct illegality");
{
for (int i = T_BOOLEAN; i <= T_CONFLICT; i++) {
BasicType vt = (BasicType)i;
BasicType ft = type2field[vt];
switch (vt) {
// the following types might plausibly show up in memory layouts:
case T_BOOLEAN:
case T_BYTE:
case T_CHAR:
case T_SHORT:
case T_INT:
case T_FLOAT:
case T_DOUBLE:
case T_LONG:
case T_OBJECT:
case T_ADDRESS: // random raw pointer
case T_NARROWOOP: // compressed pointer
case T_CONFLICT: // might as well support a bottom type
case T_VOID: // padding or other unaddressed word
// layout type must map to itself
assert(vt == ft, "");
break;
default:
// non-layout type must map to a (different) layout type
assert(vt != ft, "");
assert(ft == type2field[ft], "");
}
// every type must map to same-sized layout type:
assert(type2size[vt] == type2size[ft], "");
}
}
// These are assumed, e.g., when filling HeapWords with juints.
assert(is_power_of_2(sizeof(juint)), "juint must be power of 2");
assert(is_power_of_2(HeapWordSize), "HeapWordSize must be power of 2");
assert((size_t)HeapWordSize >= sizeof(juint),
"HeapWord should be at least as large as juint");
assert(sizeof(NULL) == sizeof(char*), "NULL must be same size as pointer");
#endif
if( JavaPriority1_To_OSPriority != -1 )
os::java_to_os_priority[1] = JavaPriority1_To_OSPriority;
if( JavaPriority2_To_OSPriority != -1 )
os::java_to_os_priority[2] = JavaPriority2_To_OSPriority;
if( JavaPriority3_To_OSPriority != -1 )
os::java_to_os_priority[3] = JavaPriority3_To_OSPriority;
if( JavaPriority4_To_OSPriority != -1 )
os::java_to_os_priority[4] = JavaPriority4_To_OSPriority;
if( JavaPriority5_To_OSPriority != -1 )
os::java_to_os_priority[5] = JavaPriority5_To_OSPriority;
if( JavaPriority6_To_OSPriority != -1 )
os::java_to_os_priority[6] = JavaPriority6_To_OSPriority;
if( JavaPriority7_To_OSPriority != -1 )
os::java_to_os_priority[7] = JavaPriority7_To_OSPriority;
if( JavaPriority8_To_OSPriority != -1 )
os::java_to_os_priority[8] = JavaPriority8_To_OSPriority;
if( JavaPriority9_To_OSPriority != -1 )
os::java_to_os_priority[9] = JavaPriority9_To_OSPriority;
if(JavaPriority10_To_OSPriority != -1 )
os::java_to_os_priority[10] = JavaPriority10_To_OSPriority;
// Set the size of basic types here (after argument parsing but before
// stub generation).
if (UseCompressedOops) {
// Size info for oops within java objects is fixed
heapOopSize = jintSize;
LogBytesPerHeapOop = LogBytesPerInt;
LogBitsPerHeapOop = LogBitsPerInt;
BytesPerHeapOop = BytesPerInt;
BitsPerHeapOop = BitsPerInt;
} else {
heapOopSize = oopSize;
LogBytesPerHeapOop = LogBytesPerWord;
LogBitsPerHeapOop = LogBitsPerWord;
BytesPerHeapOop = BytesPerWord;
BitsPerHeapOop = BitsPerWord;
}
_type2aelembytes[T_OBJECT] = heapOopSize;
_type2aelembytes[T_ARRAY] = heapOopSize;
}
