--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/interpreter/abstractInterpreter.hpp Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,335 @@
+/*
+ * Copyright (c) 1997, 2017, 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.
+ *
+ */
+
+#ifndef SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP
+#define SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP
+
+#include "asm/macroAssembler.hpp"
+#include "code/stubs.hpp"
+#include "interpreter/bytecodes.hpp"
+#include "runtime/thread.hpp"
+#include "runtime/vmThread.hpp"
+
+// This file contains the platform-independent parts
+// of the abstract interpreter and the abstract interpreter generator.
+
+// Organization of the interpreter(s). There exists two different interpreters in hotpot
+// an assembly language version (aka template interpreter) and a high level language version
+// (aka c++ interpreter). Th division of labor is as follows:
+
+// Template Interpreter C++ Interpreter Functionality
+//
+// templateTable* bytecodeInterpreter* actual interpretation of bytecodes
+//
+// templateInterpreter* cppInterpreter* generation of assembly code that creates
+// and manages interpreter runtime frames.
+// Also code for populating interpreter
+// frames created during deoptimization.
+//
+
+class InterpreterMacroAssembler;
+
+class AbstractInterpreter: AllStatic {
+ friend class VMStructs;
+ friend class CppInterpreterGenerator;
+ friend class TemplateInterpreterGenerator;
+ public:
+ enum MethodKind {
+ zerolocals, // method needs locals initialization
+ zerolocals_synchronized, // method needs locals initialization & is synchronized
+ native, // native method
+ native_synchronized, // native method & is synchronized
+ empty, // empty method (code: _return)
+ accessor, // accessor method (code: _aload_0, _getfield, _(a|i)return)
+ abstract, // abstract method (throws an AbstractMethodException)
+ method_handle_invoke_FIRST, // java.lang.invoke.MethodHandles::invokeExact, etc.
+ method_handle_invoke_LAST = (method_handle_invoke_FIRST
+ + (vmIntrinsics::LAST_MH_SIG_POLY
+ - vmIntrinsics::FIRST_MH_SIG_POLY)),
+ java_lang_math_sin, // implementation of java.lang.Math.sin (x)
+ java_lang_math_cos, // implementation of java.lang.Math.cos (x)
+ java_lang_math_tan, // implementation of java.lang.Math.tan (x)
+ java_lang_math_abs, // implementation of java.lang.Math.abs (x)
+ java_lang_math_sqrt, // implementation of java.lang.Math.sqrt (x)
+ java_lang_math_log, // implementation of java.lang.Math.log (x)
+ java_lang_math_log10, // implementation of java.lang.Math.log10 (x)
+ java_lang_math_pow, // implementation of java.lang.Math.pow (x,y)
+ java_lang_math_exp, // implementation of java.lang.Math.exp (x)
+ java_lang_math_fmaF, // implementation of java.lang.Math.fma (x, y, z)
+ java_lang_math_fmaD, // implementation of java.lang.Math.fma (x, y, z)
+ java_lang_ref_reference_get, // implementation of java.lang.ref.Reference.get()
+ java_util_zip_CRC32_update, // implementation of java.util.zip.CRC32.update()
+ java_util_zip_CRC32_updateBytes, // implementation of java.util.zip.CRC32.updateBytes()
+ java_util_zip_CRC32_updateByteBuffer, // implementation of java.util.zip.CRC32.updateByteBuffer()
+ java_util_zip_CRC32C_updateBytes, // implementation of java.util.zip.CRC32C.updateBytes(crc, b[], off, end)
+ java_util_zip_CRC32C_updateDirectByteBuffer, // implementation of java.util.zip.CRC32C.updateDirectByteBuffer(crc, address, off, end)
+ java_lang_Float_intBitsToFloat, // implementation of java.lang.Float.intBitsToFloat()
+ java_lang_Float_floatToRawIntBits, // implementation of java.lang.Float.floatToRawIntBits()
+ java_lang_Double_longBitsToDouble, // implementation of java.lang.Double.longBitsToDouble()
+ java_lang_Double_doubleToRawLongBits, // implementation of java.lang.Double.doubleToRawLongBits()
+ number_of_method_entries,
+ invalid = -1
+ };
+
+ // Conversion from the part of the above enum to vmIntrinsics::_invokeExact, etc.
+ static vmIntrinsics::ID method_handle_intrinsic(MethodKind kind) {
+ if (kind >= method_handle_invoke_FIRST && kind <= method_handle_invoke_LAST)
+ return (vmIntrinsics::ID)( vmIntrinsics::FIRST_MH_SIG_POLY + (kind - method_handle_invoke_FIRST) );
+ else
+ return vmIntrinsics::_none;
+ }
+
+ enum SomeConstants {
+ number_of_result_handlers = 10 // number of result handlers for native calls
+ };
+
+ protected:
+ static StubQueue* _code; // the interpreter code (codelets)
+
+ static bool _notice_safepoints; // true if safepoints are activated
+
+ static address _native_entry_begin; // Region for native entry code
+ static address _native_entry_end;
+
+ // method entry points
+ static address _entry_table[number_of_method_entries]; // entry points for a given method
+ static address _cds_entry_table[number_of_method_entries]; // entry points for methods in the CDS archive
+ static address _native_abi_to_tosca[number_of_result_handlers]; // for native method result handlers
+ static address _slow_signature_handler; // the native method generic (slow) signature handler
+
+ static address _rethrow_exception_entry; // rethrows an activation in previous frame
+
+ friend class AbstractInterpreterGenerator;
+ friend class InterpreterMacroAssembler;
+
+ public:
+ // Initialization/debugging
+ static void initialize();
+ static StubQueue* code() { return _code; }
+
+
+ // Method activation
+ static MethodKind method_kind(const methodHandle& m);
+ static address entry_for_kind(MethodKind k) { assert(0 <= k && k < number_of_method_entries, "illegal kind"); return _entry_table[k]; }
+ static address entry_for_method(const methodHandle& m) { return entry_for_kind(method_kind(m)); }
+
+ static address entry_for_cds_method(const methodHandle& m) {
+ MethodKind k = method_kind(m);
+ assert(0 <= k && k < number_of_method_entries, "illegal kind");
+ return _cds_entry_table[k];
+ }
+
+ // used by class data sharing
+ static void update_cds_entry_table(MethodKind kind) NOT_CDS_RETURN;
+
+ static address get_trampoline_code_buffer(AbstractInterpreter::MethodKind kind) NOT_CDS_RETURN_(0);
+
+ // used for bootstrapping method handles:
+ static void set_entry_for_kind(MethodKind k, address e);
+
+ static void print_method_kind(MethodKind kind) PRODUCT_RETURN;
+
+ // These should never be compiled since the interpreter will prefer
+ // the compiled version to the intrinsic version.
+ static bool can_be_compiled(const methodHandle& m) {
+ switch (m->intrinsic_id()) {
+ case vmIntrinsics::_dsin : // fall thru
+ case vmIntrinsics::_dcos : // fall thru
+ case vmIntrinsics::_dtan : // fall thru
+ case vmIntrinsics::_dabs : // fall thru
+ case vmIntrinsics::_dsqrt : // fall thru
+ case vmIntrinsics::_dlog : // fall thru
+ case vmIntrinsics::_dlog10: // fall thru
+ case vmIntrinsics::_dpow : // fall thru
+ case vmIntrinsics::_dexp : // fall thru
+ case vmIntrinsics::_fmaD : // fall thru
+ case vmIntrinsics::_fmaF : // fall thru
+ return false;
+ default:
+ return true;
+ }
+ }
+
+ // Runtime support
+
+ // length = invoke bytecode length (to advance to next bytecode)
+ static address deopt_entry(TosState state, int length) { ShouldNotReachHere(); return NULL; }
+ static address return_entry(TosState state, int length, Bytecodes::Code code) { ShouldNotReachHere(); return NULL; }
+
+ static address rethrow_exception_entry() { return _rethrow_exception_entry; }
+
+ // Activation size in words for a method that is just being called.
+ // Parameters haven't been pushed so count them too.
+ static int size_top_interpreter_activation(Method* method);
+
+ // Deoptimization support
+ // Compute the entry address for continuation after
+ static address deopt_continue_after_entry(Method* method,
+ address bcp,
+ int callee_parameters,
+ bool is_top_frame);
+ // Compute the entry address for reexecution
+ static address deopt_reexecute_entry(Method* method, address bcp);
+ // Deoptimization should reexecute this bytecode
+ static bool bytecode_should_reexecute(Bytecodes::Code code);
+
+ // deoptimization support
+ static int size_activation(int max_stack,
+ int temps,
+ int extra_args,
+ int monitors,
+ int callee_params,
+ int callee_locals,
+ bool is_top_frame);
+
+ static void layout_activation(Method* method,
+ int temps,
+ int popframe_args,
+ int monitors,
+ int caller_actual_parameters,
+ int callee_params,
+ int callee_locals,
+ frame* caller,
+ frame* interpreter_frame,
+ bool is_top_frame,
+ bool is_bottom_frame);
+
+ // Runtime support
+ static bool is_not_reached(const methodHandle& method, int bci);
+ // Safepoint support
+ static void notice_safepoints() { ShouldNotReachHere(); } // stops the thread when reaching a safepoint
+ static void ignore_safepoints() { ShouldNotReachHere(); } // ignores safepoints
+
+ // Support for native calls
+ static address slow_signature_handler() { return _slow_signature_handler; }
+ static address result_handler(BasicType type) { return _native_abi_to_tosca[BasicType_as_index(type)]; }
+ static int BasicType_as_index(BasicType type); // computes index into result_handler_by_index table
+ static bool in_native_entry(address pc) { return _native_entry_begin <= pc && pc < _native_entry_end; }
+ // Debugging/printing
+ static void print(); // prints the interpreter code
+
+ public:
+ // Interpreter helpers
+ const static int stackElementWords = 1;
+ const static int stackElementSize = stackElementWords * wordSize;
+ const static int logStackElementSize = LogBytesPerWord;
+
+ static int expr_index_at(int i) {
+ return stackElementWords * i;
+ }
+
+ static int expr_offset_in_bytes(int i) {
+#if !defined(ZERO) && (defined(PPC) || defined(S390) || defined(SPARC))
+ return stackElementSize * i + wordSize; // both point to one word past TOS
+#else
+ return stackElementSize * i;
+#endif
+ }
+
+ static int local_index_at(int i) {
+ assert(i <= 0, "local direction already negated");
+ return stackElementWords * i;
+ }
+
+#if !defined(ZERO) && (defined(IA32) || defined(AMD64))
+ static Address::ScaleFactor stackElementScale() {
+ return NOT_LP64(Address::times_4) LP64_ONLY(Address::times_8);
+ }
+#endif
+
+ // Local values relative to locals[n]
+ static int local_offset_in_bytes(int n) {
+ return ((frame::interpreter_frame_expression_stack_direction() * n) * stackElementSize);
+ }
+
+ // access to stacked values according to type:
+ static oop* oop_addr_in_slot(intptr_t* slot_addr) {
+ return (oop*) slot_addr;
+ }
+ static jint* int_addr_in_slot(intptr_t* slot_addr) {
+ if ((int) sizeof(jint) < wordSize && !Endian::is_Java_byte_ordering_different())
+ // big-endian LP64
+ return (jint*)(slot_addr + 1) - 1;
+ else
+ return (jint*) slot_addr;
+ }
+ static jlong long_in_slot(intptr_t* slot_addr) {
+ if (sizeof(intptr_t) >= sizeof(jlong)) {
+ return *(jlong*) slot_addr;
+ } else {
+ return Bytes::get_native_u8((address)slot_addr);
+ }
+ }
+ static void set_long_in_slot(intptr_t* slot_addr, jlong value) {
+ if (sizeof(intptr_t) >= sizeof(jlong)) {
+ *(jlong*) slot_addr = value;
+ } else {
+ Bytes::put_native_u8((address)slot_addr, value);
+ }
+ }
+ static void get_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
+ switch (type) {
+ case T_BOOLEAN: value->z = *int_addr_in_slot(slot_addr); break;
+ case T_CHAR: value->c = *int_addr_in_slot(slot_addr); break;
+ case T_BYTE: value->b = *int_addr_in_slot(slot_addr); break;
+ case T_SHORT: value->s = *int_addr_in_slot(slot_addr); break;
+ case T_INT: value->i = *int_addr_in_slot(slot_addr); break;
+ case T_LONG: value->j = long_in_slot(slot_addr); break;
+ case T_FLOAT: value->f = *(jfloat*)int_addr_in_slot(slot_addr); break;
+ case T_DOUBLE: value->d = jdouble_cast(long_in_slot(slot_addr)); break;
+ case T_OBJECT: value->l = (jobject)*oop_addr_in_slot(slot_addr); break;
+ default: ShouldNotReachHere();
+ }
+ }
+ static void set_jvalue_in_slot(intptr_t* slot_addr, BasicType type, jvalue* value) {
+ switch (type) {
+ case T_BOOLEAN: *int_addr_in_slot(slot_addr) = (value->z != 0); break;
+ case T_CHAR: *int_addr_in_slot(slot_addr) = value->c; break;
+ case T_BYTE: *int_addr_in_slot(slot_addr) = value->b; break;
+ case T_SHORT: *int_addr_in_slot(slot_addr) = value->s; break;
+ case T_INT: *int_addr_in_slot(slot_addr) = value->i; break;
+ case T_LONG: set_long_in_slot(slot_addr, value->j); break;
+ case T_FLOAT: *(jfloat*)int_addr_in_slot(slot_addr) = value->f; break;
+ case T_DOUBLE: set_long_in_slot(slot_addr, jlong_cast(value->d)); break;
+ case T_OBJECT: *oop_addr_in_slot(slot_addr) = (oop) value->l; break;
+ default: ShouldNotReachHere();
+ }
+ }
+
+ static void initialize_method_handle_entries();
+};
+
+//------------------------------------------------------------------------------------------------------------------------
+// The interpreter generator.
+
+class Template;
+class AbstractInterpreterGenerator: public StackObj {
+ protected:
+ InterpreterMacroAssembler* _masm;
+
+ public:
+ AbstractInterpreterGenerator(StubQueue* _code);
+};
+
+#endif // SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP