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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.inline.hpp" #include "runtime/vmThread.hpp" #include "utilities/top.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. // // For both template and c++ interpreter. There are common files for aspects of the interpreter // that are generic to both interpreters. This is the layout: // // abstractInterpreter.hpp: generic description of the interpreter. // interpreter*: generic frame creation and handling. // //------------------------------------------------------------------------------------------------------------------------ // The C++ interface to the bytecode interpreter(s). class InterpreterMacroAssembler; class AbstractInterpreter: AllStatic { friend class VMStructs; friend class Interpreter; friend class CppInterpreterGenerator; 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_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() 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 _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 InterpreterGenerator; friend class InterpreterMacroAssembler; public: // Initialization/debugging static void initialize(); static StubQueue* code() { return _code; } // Method activation static MethodKind method_kind(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(methodHandle m) { return entry_for_kind(method_kind(m)); } // used for bootstrapping method handles: static void set_entry_for_kind(MethodKind k, address e); static void print_method_kind(MethodKind kind) PRODUCT_RETURN; static bool can_be_compiled(methodHandle m); // 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( 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; // 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 && !Bytes::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(); } } }; //------------------------------------------------------------------------------------------------------------------------ // The interpreter generator. class Template; class AbstractInterpreterGenerator: public StackObj { protected: InterpreterMacroAssembler* _masm; // shared code sequences // Converter for native abi result to tosca result address generate_result_handler_for(BasicType type); address generate_slow_signature_handler(); // entry point generator address generate_method_entry(AbstractInterpreter::MethodKind kind); void bang_stack_shadow_pages(bool native_call); void generate_all(); void initialize_method_handle_entries(); public: AbstractInterpreterGenerator(StubQueue* _code); }; #endif // SHARE_VM_INTERPRETER_ABSTRACTINTERPRETER_HPP