--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/utilities/globalDefinitions.cpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,370 @@
+/*
+ * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "runtime/os.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+// Basic error support
+
+// Info for oops within a java object. Defaults are zero so
+// things will break badly if incorrectly initialized.
+int heapOopSize = 0;
+int LogBytesPerHeapOop = 0;
+int LogBitsPerHeapOop = 0;
+int BytesPerHeapOop = 0;
+int BitsPerHeapOop = 0;
+
+// Object alignment, in units of HeapWords.
+// Defaults are -1 so things will break badly if incorrectly initialized.
+int MinObjAlignment = -1;
+int MinObjAlignmentInBytes = -1;
+int MinObjAlignmentInBytesMask = 0;
+
+int LogMinObjAlignment = -1;
+int LogMinObjAlignmentInBytes = -1;
+
+// Oop encoding heap max
+uint64_t OopEncodingHeapMax = 0;
+
+void basic_fatal(const char* msg) {
+ fatal("%s", msg);
+}
+
+// Something to help porters sleep at night
+
+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");
+ assert(wordSize == BytesPerWord, "should be the same since they're used interchangeably");
+ assert(wordSize == HeapWordSize, "should be the same since they're also used interchangeably");
+
+ 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_METADATA: // metadata pointer
+ case T_NARROWOOP: // compressed pointer
+ case T_NARROWKLASS: // compressed klass 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;
+}
+
+
+// Map BasicType to signature character
+char type2char_tab[T_CONFLICT+1]={ 0, 0, 0, 0, 'Z', 'C', 'F', 'D', 'B', 'S', 'I', 'J', 'L', '[', 'V', 0, 0, 0, 0, 0};
+
+// Map BasicType to Java type name
+const char* type2name_tab[T_CONFLICT+1] = {
+ NULL, NULL, NULL, NULL,
+ "boolean",
+ "char",
+ "float",
+ "double",
+ "byte",
+ "short",
+ "int",
+ "long",
+ "object",
+ "array",
+ "void",
+ "*address*",
+ "*narrowoop*",
+ "*metadata*",
+ "*narrowklass*",
+ "*conflict*"
+};
+
+
+BasicType name2type(const char* name) {
+ for (int i = T_BOOLEAN; i <= T_VOID; i++) {
+ BasicType t = (BasicType)i;
+ if (type2name_tab[t] != NULL && 0 == strcmp(type2name_tab[t], name))
+ return t;
+ }
+ return T_ILLEGAL;
+}
+
+// Map BasicType to size in words
+int type2size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, 1, 1, 1, -1};
+
+BasicType type2field[T_CONFLICT+1] = {
+ (BasicType)0, // 0,
+ (BasicType)0, // 1,
+ (BasicType)0, // 2,
+ (BasicType)0, // 3,
+ T_BOOLEAN, // T_BOOLEAN = 4,
+ T_CHAR, // T_CHAR = 5,
+ T_FLOAT, // T_FLOAT = 6,
+ T_DOUBLE, // T_DOUBLE = 7,
+ T_BYTE, // T_BYTE = 8,
+ T_SHORT, // T_SHORT = 9,
+ T_INT, // T_INT = 10,
+ T_LONG, // T_LONG = 11,
+ T_OBJECT, // T_OBJECT = 12,
+ T_OBJECT, // T_ARRAY = 13,
+ T_VOID, // T_VOID = 14,
+ T_ADDRESS, // T_ADDRESS = 15,
+ T_NARROWOOP, // T_NARROWOOP= 16,
+ T_METADATA, // T_METADATA = 17,
+ T_NARROWKLASS, // T_NARROWKLASS = 18,
+ T_CONFLICT // T_CONFLICT = 19,
+};
+
+
+BasicType type2wfield[T_CONFLICT+1] = {
+ (BasicType)0, // 0,
+ (BasicType)0, // 1,
+ (BasicType)0, // 2,
+ (BasicType)0, // 3,
+ T_INT, // T_BOOLEAN = 4,
+ T_INT, // T_CHAR = 5,
+ T_FLOAT, // T_FLOAT = 6,
+ T_DOUBLE, // T_DOUBLE = 7,
+ T_INT, // T_BYTE = 8,
+ T_INT, // T_SHORT = 9,
+ T_INT, // T_INT = 10,
+ T_LONG, // T_LONG = 11,
+ T_OBJECT, // T_OBJECT = 12,
+ T_OBJECT, // T_ARRAY = 13,
+ T_VOID, // T_VOID = 14,
+ T_ADDRESS, // T_ADDRESS = 15,
+ T_NARROWOOP, // T_NARROWOOP = 16,
+ T_METADATA, // T_METADATA = 17,
+ T_NARROWKLASS, // T_NARROWKLASS = 18,
+ T_CONFLICT // T_CONFLICT = 19,
+};
+
+
+int _type2aelembytes[T_CONFLICT+1] = {
+ 0, // 0
+ 0, // 1
+ 0, // 2
+ 0, // 3
+ T_BOOLEAN_aelem_bytes, // T_BOOLEAN = 4,
+ T_CHAR_aelem_bytes, // T_CHAR = 5,
+ T_FLOAT_aelem_bytes, // T_FLOAT = 6,
+ T_DOUBLE_aelem_bytes, // T_DOUBLE = 7,
+ T_BYTE_aelem_bytes, // T_BYTE = 8,
+ T_SHORT_aelem_bytes, // T_SHORT = 9,
+ T_INT_aelem_bytes, // T_INT = 10,
+ T_LONG_aelem_bytes, // T_LONG = 11,
+ T_OBJECT_aelem_bytes, // T_OBJECT = 12,
+ T_ARRAY_aelem_bytes, // T_ARRAY = 13,
+ 0, // T_VOID = 14,
+ T_OBJECT_aelem_bytes, // T_ADDRESS = 15,
+ T_NARROWOOP_aelem_bytes, // T_NARROWOOP= 16,
+ T_OBJECT_aelem_bytes, // T_METADATA = 17,
+ T_NARROWKLASS_aelem_bytes, // T_NARROWKLASS= 18,
+ 0 // T_CONFLICT = 19,
+};
+
+#ifdef ASSERT
+int type2aelembytes(BasicType t, bool allow_address) {
+ assert(allow_address || t != T_ADDRESS, " ");
+ return _type2aelembytes[t];
+}
+#endif
+
+// Support for 64-bit integer arithmetic
+
+// The following code is mostly taken from JVM typedefs_md.h and system_md.c
+
+static const jlong high_bit = (jlong)1 << (jlong)63;
+static const jlong other_bits = ~high_bit;
+
+jlong float2long(jfloat f) {
+ jlong tmp = (jlong) f;
+ if (tmp != high_bit) {
+ return tmp;
+ } else {
+ if (g_isnan((jdouble)f)) {
+ return 0;
+ }
+ if (f < 0) {
+ return high_bit;
+ } else {
+ return other_bits;
+ }
+ }
+}
+
+
+jlong double2long(jdouble f) {
+ jlong tmp = (jlong) f;
+ if (tmp != high_bit) {
+ return tmp;
+ } else {
+ if (g_isnan(f)) {
+ return 0;
+ }
+ if (f < 0) {
+ return high_bit;
+ } else {
+ return other_bits;
+ }
+ }
+}
+
+// least common multiple
+size_t lcm(size_t a, size_t b) {
+ size_t cur, div, next;
+
+ cur = MAX2(a, b);
+ div = MIN2(a, b);
+
+ assert(div != 0, "lcm requires positive arguments");
+
+
+ while ((next = cur % div) != 0) {
+ cur = div; div = next;
+ }
+
+
+ julong result = julong(a) * b / div;
+ assert(result <= (size_t)max_uintx, "Integer overflow in lcm");
+
+ return size_t(result);
+}
+
+
+// Test that nth_bit macro and friends behave as
+// expected, even with low-precedence operators.
+
+STATIC_ASSERT(nth_bit(3) == 0x8);
+STATIC_ASSERT(nth_bit(1|2) == 0x8);
+
+STATIC_ASSERT(right_n_bits(3) == 0x7);
+STATIC_ASSERT(right_n_bits(1|2) == 0x7);
+
+STATIC_ASSERT(left_n_bits(3) == (intptr_t) LP64_ONLY(0xE000000000000000) NOT_LP64(0xE0000000));
+STATIC_ASSERT(left_n_bits(1|2) == (intptr_t) LP64_ONLY(0xE000000000000000) NOT_LP64(0xE0000000));