| /* | |
| * Copyright (c) 2016, 2025, Oracle and/or its affiliates. All rights reserved. | |
| * Copyright (c) 2016, 2024 SAP SE. 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 "asm/macroAssembler.inline.hpp" | |
| #include "classfile/javaClasses.hpp" | |
| #include "compiler/disassembler.hpp" | |
| #include "gc/shared/barrierSetAssembler.hpp" | |
| #include "interpreter/abstractInterpreter.hpp" | |
| #include "interpreter/bytecodeHistogram.hpp" | |
| #include "interpreter/interpreter.hpp" | |
| #include "interpreter/interpreterRuntime.hpp" | |
| #include "interpreter/interp_masm.hpp" | |
| #include "interpreter/templateInterpreterGenerator.hpp" | |
| #include "interpreter/templateTable.hpp" | |
| #include "oops/arrayOop.hpp" | |
| #include "oops/methodCounters.hpp" | |
| #include "oops/methodData.hpp" | |
| #include "oops/oop.inline.hpp" | |
| #include "oops/resolvedIndyEntry.hpp" | |
| #include "oops/resolvedMethodEntry.hpp" | |
| #include "prims/jvmtiExport.hpp" | |
| #include "prims/jvmtiThreadState.hpp" | |
| #include "runtime/arguments.hpp" | |
| #include "runtime/deoptimization.hpp" | |
| #include "runtime/frame.inline.hpp" | |
| #include "runtime/jniHandles.hpp" | |
| #include "runtime/sharedRuntime.hpp" | |
| #include "runtime/stubRoutines.hpp" | |
| #include "runtime/synchronizer.hpp" | |
| #include "runtime/timer.hpp" | |
| #include "runtime/vframeArray.hpp" | |
| #include "utilities/debug.hpp" | |
| #include "utilities/macros.hpp" | |
| // Size of interpreter code. Increase if too small. Interpreter will | |
| // fail with a guarantee ("not enough space for interpreter generation"); | |
| // if too small. | |
| // Run with +PrintInterpreter to get the VM to print out the size. | |
| // Max size with JVMTI | |
| int TemplateInterpreter::InterpreterCodeSize = 320*K; | |
| #undef __ | |
| #ifdef PRODUCT | |
| #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)-> | |
| #else | |
| #define __ Disassembler::hook<InterpreterMacroAssembler>(__FILE__, __LINE__, _masm)-> | |
| // #define __ (Verbose ? (_masm->block_comment(FILE_AND_LINE),_masm):_masm)-> | |
| #endif | |
| #define BLOCK_COMMENT(str) __ block_comment(str) | |
| #define BIND(label) __ bind(label); BLOCK_COMMENT(#label ":") | |
| #define oop_tmp_offset _z_ijava_state_neg(oop_tmp) | |
| //----------------------------------------------------------------------------- | |
| address TemplateInterpreterGenerator::generate_slow_signature_handler() { | |
| // | |
| // New slow_signature handler that respects the z/Architecture | |
| // C calling conventions. | |
| // | |
| // We get called by the native entry code with our output register | |
| // area == 8. First we call InterpreterRuntime::get_result_handler | |
| // to copy the pointer to the signature string temporarily to the | |
| // first C-argument and to return the result_handler in | |
| // Z_RET. Since native_entry will copy the jni-pointer to the | |
| // first C-argument slot later on, it's OK to occupy this slot | |
| // temporarily. Then we copy the argument list on the java | |
| // expression stack into native varargs format on the native stack | |
| // and load arguments into argument registers. Integer arguments in | |
| // the varargs vector will be sign-extended to 8 bytes. | |
| // | |
| // On entry: | |
| // Z_ARG1 - intptr_t* Address of java argument list in memory. | |
| // Z_state - zeroInterpreter* Address of interpreter state for | |
| // this method | |
| // Z_method | |
| // | |
| // On exit (just before return instruction): | |
| // Z_RET contains the address of the result_handler. | |
| // Z_ARG2 is not updated for static methods and contains "this" otherwise. | |
| // Z_ARG3-Z_ARG5 contain the first 3 arguments of types other than float and double. | |
| // Z_FARG1-Z_FARG4 contain the first 4 arguments of type float or double. | |
| const int LogSizeOfCase = 3; | |
| const int max_fp_register_arguments = Argument::n_float_register_parameters; | |
| const int max_int_register_arguments = Argument::n_register_parameters - 2; // First 2 are reserved. | |
| const Register arg_java = Z_tmp_2; | |
| const Register arg_c = Z_tmp_3; | |
| const Register signature = Z_R1_scratch; // Is a string. | |
| const Register fpcnt = Z_R0_scratch; | |
| const Register argcnt = Z_tmp_4; | |
| const Register intSlot = Z_tmp_1; | |
| const Register sig_end = Z_tmp_1; // Assumed end of signature (only used in do_object). | |
| const Register target_sp = Z_tmp_1; | |
| const FloatRegister floatSlot = Z_F1; | |
| const int d_signature = _z_abi(gpr6); // Only spill space, register contents not affected. | |
| const int d_fpcnt = _z_abi(gpr7); // Only spill space, register contents not affected. | |
| unsigned int entry_offset = __ offset(); | |
| BLOCK_COMMENT("slow_signature_handler {"); | |
| // We use target_sp for storing arguments in the C frame. | |
| __ save_return_pc(); | |
| __ push_frame_abi160(4*BytesPerWord); // Reserve space to save the tmp_[1..4] registers. | |
| __ z_stmg(Z_R10, Z_R13, frame::z_abi_160_size, Z_SP); // Save registers only after frame is pushed. | |
| __ z_lgr(arg_java, Z_ARG1); | |
| Register method = Z_ARG2; // Directly load into correct argument register. | |
| __ get_method(method); | |
| __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_signature), Z_thread, method); | |
| // Move signature to callee saved register. | |
| // Don't directly write to stack. Frame is used by VM call. | |
| __ z_lgr(Z_tmp_1, Z_RET); | |
| // Reload method. Register may have been altered by VM call. | |
| __ get_method(method); | |
| // Get address of result handler. | |
| __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::get_result_handler), Z_thread, method); | |
| // Save signature address to stack. | |
| __ z_stg(Z_tmp_1, d_signature, Z_SP); | |
| // Don't overwrite return value (Z_RET, Z_ARG1) in rest of the method ! | |
| { | |
| Label isStatic; | |
| // Test if static. | |
| // We can test the bit directly. | |
| // Path is Z_method->_access_flags._flags. | |
| // We only support flag bits in the least significant byte (assert !). | |
| // Therefore add 3 to address that byte within "_flags". | |
| // Reload method. VM call above may have destroyed register contents | |
| __ get_method(method); | |
| __ testbit_ushort(method2_(method, access_flags), JVM_ACC_STATIC_BIT); | |
| method = noreg; // end of life | |
| __ z_btrue(isStatic); | |
| // For non-static functions, pass "this" in Z_ARG2 and copy it to 2nd C-arg slot. | |
| // Need to box the Java object here, so we use arg_java | |
| // (address of current Java stack slot) as argument and | |
| // don't dereference it as in case of ints, floats, etc.. | |
| __ z_lgr(Z_ARG2, arg_java); | |
| __ add2reg(arg_java, -BytesPerWord); | |
| __ bind(isStatic); | |
| } | |
| // argcnt == 0 corresponds to 3rd C argument. | |
| // arg #1 (result handler) and | |
| // arg #2 (this, for non-statics), unused else | |
| // are reserved and pre-filled above. | |
| // arg_java points to the corresponding Java argument here. It | |
| // has been decremented by one argument (this) in case of non-static. | |
| __ clear_reg(argcnt, true, false); // Don't set CC. | |
| __ z_lg(target_sp, 0, Z_SP); | |
| __ add2reg(arg_c, _z_abi(remaining_cargs), target_sp); | |
| // No floating-point args parsed so far. | |
| __ clear_mem(Address(Z_SP, d_fpcnt), 8); | |
| NearLabel move_intSlot_to_ARG, move_floatSlot_to_FARG; | |
| NearLabel loop_start, loop_start_restore, loop_end; | |
| NearLabel do_int, do_long, do_float, do_double; | |
| NearLabel do_dontreachhere, do_object, do_array, do_boxed; | |
| #ifdef ASSERT | |
| // Signature needs to point to '(' (== 0x28) at entry. | |
| __ z_lg(signature, d_signature, Z_SP); | |
| __ z_cli(0, signature, (int) '('); | |
| __ z_brne(do_dontreachhere); | |
| #endif | |
| __ bind(loop_start_restore); | |
| __ z_lg(signature, d_signature, Z_SP); // Restore signature ptr, destroyed by move_XX_to_ARG. | |
| BIND(loop_start); | |
| // Advance to next argument type token from the signature. | |
| __ add2reg(signature, 1); | |
| // Use CLI, works well on all CPU versions. | |
| __ z_cli(0, signature, (int) ')'); | |
| __ z_bre(loop_end); // end of signature | |
| __ z_cli(0, signature, (int) 'L'); | |
| __ z_bre(do_object); // object #9 | |
| __ z_cli(0, signature, (int) 'F'); | |
| __ z_bre(do_float); // float #7 | |
| __ z_cli(0, signature, (int) 'J'); | |
| __ z_bre(do_long); // long #6 | |
| __ z_cli(0, signature, (int) 'B'); | |
| __ z_bre(do_int); // byte #1 | |
| __ z_cli(0, signature, (int) 'Z'); | |
| __ z_bre(do_int); // boolean #2 | |
| __ z_cli(0, signature, (int) 'C'); | |
| __ z_bre(do_int); // char #3 | |
| __ z_cli(0, signature, (int) 'S'); | |
| __ z_bre(do_int); // short #4 | |
| __ z_cli(0, signature, (int) 'I'); | |
| __ z_bre(do_int); // int #5 | |
| __ z_cli(0, signature, (int) 'D'); | |
| __ z_bre(do_double); // double #8 | |
| __ z_cli(0, signature, (int) '['); | |
| __ z_bre(do_array); // array #10 | |
| __ bind(do_dontreachhere); | |
| __ unimplemented("ShouldNotReachHere in slow_signature_handler", 120); | |
| // Array argument | |
| BIND(do_array); | |
| { | |
| Label start_skip, end_skip; | |
| __ bind(start_skip); | |
| // Advance to next type tag from signature. | |
| __ add2reg(signature, 1); | |
| // Use CLI, works well on all CPU versions. | |
| __ z_cli(0, signature, (int) '['); | |
| __ z_bre(start_skip); // Skip further brackets. | |
| __ z_cli(0, signature, (int) '9'); | |
| __ z_brh(end_skip); // no optional size | |
| __ z_cli(0, signature, (int) '0'); | |
| __ z_brnl(start_skip); // Skip optional size. | |
| __ bind(end_skip); | |
| __ z_cli(0, signature, (int) 'L'); | |
| __ z_brne(do_boxed); // If not array of objects: go directly to do_boxed. | |
| } | |
| // OOP argument | |
| BIND(do_object); | |
| // Pass by an object's type name. | |
| { | |
| Label L; | |
| __ add2reg(sig_end, 4095, signature); // Assume object type name is shorter than 4k. | |
| __ load_const_optimized(Z_R0, (int) ';'); // Type name terminator (must be in Z_R0!). | |
| __ MacroAssembler::search_string(sig_end, signature); | |
| __ z_brl(L); | |
| __ z_illtrap(); // No semicolon found: internal error or object name too long. | |
| __ bind(L); | |
| __ z_lgr(signature, sig_end); | |
| // fallthru to do_boxed | |
| } | |
| // Need to box the Java object here, so we use arg_java | |
| // (address of current Java stack slot) as argument and | |
| // don't dereference it as in case of ints, floats, etc.. | |
| // UNBOX argument | |
| // Load reference and check for null. | |
| Label do_int_Entry4Boxed; | |
| __ bind(do_boxed); | |
| { | |
| __ load_and_test_long(intSlot, Address(arg_java)); | |
| __ z_bre(do_int_Entry4Boxed); | |
| __ z_lgr(intSlot, arg_java); | |
| __ z_bru(do_int_Entry4Boxed); | |
| } | |
| // INT argument | |
| // (also for byte, boolean, char, short) | |
| // Use lgf for load (sign-extend) and stg for store. | |
| BIND(do_int); | |
| __ z_lgf(intSlot, 0, arg_java); | |
| __ bind(do_int_Entry4Boxed); | |
| __ add2reg(arg_java, -BytesPerWord); | |
| // If argument fits into argument register, go and handle it, otherwise continue. | |
| __ compare32_and_branch(argcnt, max_int_register_arguments, | |
| Assembler::bcondLow, move_intSlot_to_ARG); | |
| __ z_stg(intSlot, 0, arg_c); | |
| __ add2reg(arg_c, BytesPerWord); | |
| __ z_bru(loop_start); | |
| // LONG argument | |
| BIND(do_long); | |
| __ add2reg(arg_java, -2*BytesPerWord); // Decrement first to have positive displacement for lg. | |
| __ z_lg(intSlot, BytesPerWord, arg_java); | |
| // If argument fits into argument register, go and handle it, otherwise continue. | |
| __ compare32_and_branch(argcnt, max_int_register_arguments, | |
| Assembler::bcondLow, move_intSlot_to_ARG); | |
| __ z_stg(intSlot, 0, arg_c); | |
| __ add2reg(arg_c, BytesPerWord); | |
| __ z_bru(loop_start); | |
| // FLOAT argumen | |
| BIND(do_float); | |
| __ z_le(floatSlot, 0, arg_java); | |
| __ add2reg(arg_java, -BytesPerWord); | |
| assert(max_fp_register_arguments <= 255, "always true"); // safety net | |
| __ z_cli(d_fpcnt+7, Z_SP, max_fp_register_arguments); | |
| __ z_brl(move_floatSlot_to_FARG); | |
| __ z_ste(floatSlot, 4, arg_c); | |
| __ add2reg(arg_c, BytesPerWord); | |
| __ z_bru(loop_start); | |
| // DOUBLE argument | |
| BIND(do_double); | |
| __ add2reg(arg_java, -2*BytesPerWord); // Decrement first to have positive displacement for lg. | |
| __ z_ld(floatSlot, BytesPerWord, arg_java); | |
| assert(max_fp_register_arguments <= 255, "always true"); // safety net | |
| __ z_cli(d_fpcnt+7, Z_SP, max_fp_register_arguments); | |
| __ z_brl(move_floatSlot_to_FARG); | |
| __ z_std(floatSlot, 0, arg_c); | |
| __ add2reg(arg_c, BytesPerWord); | |
| __ z_bru(loop_start); | |
| // Method exit, all arguments processed. | |
| __ bind(loop_end); | |
| __ z_lmg(Z_R10, Z_R13, frame::z_abi_160_size, Z_SP); // restore registers before frame is popped. | |
| __ pop_frame(); | |
| __ restore_return_pc(); | |
| __ z_br(Z_R14); | |
| // Copy int arguments. | |
| Label iarg_caselist; // Distance between each case has to be a power of 2 | |
| // (= 1 << LogSizeOfCase). | |
| __ align(16); | |
| BIND(iarg_caselist); | |
| __ z_lgr(Z_ARG3, intSlot); // 4 bytes | |
| __ z_bru(loop_start_restore); // 4 bytes | |
| __ z_lgr(Z_ARG4, intSlot); | |
| __ z_bru(loop_start_restore); | |
| __ z_lgr(Z_ARG5, intSlot); | |
| __ z_bru(loop_start_restore); | |
| __ align(16); | |
| __ bind(move_intSlot_to_ARG); | |
| __ z_stg(signature, d_signature, Z_SP); // Spill since signature == Z_R1_scratch. | |
| __ z_larl(Z_R1_scratch, iarg_caselist); | |
| __ z_sllg(Z_R0_scratch, argcnt, LogSizeOfCase); | |
| __ add2reg(argcnt, 1); | |
| __ z_agr(Z_R1_scratch, Z_R0_scratch); | |
| __ z_bcr(Assembler::bcondAlways, Z_R1_scratch); | |
| // Copy float arguments. | |
| Label farg_caselist; // Distance between each case has to be a power of 2 | |
| // (= 1 << logSizeOfCase, padded with nop. | |
| __ align(16); | |
| BIND(farg_caselist); | |
| __ z_ldr(Z_FARG1, floatSlot); // 2 bytes | |
| __ z_bru(loop_start_restore); // 4 bytes | |
| __ z_nop(); // 2 bytes | |
| __ z_ldr(Z_FARG2, floatSlot); | |
| __ z_bru(loop_start_restore); | |
| __ z_nop(); | |
| __ z_ldr(Z_FARG3, floatSlot); | |
| __ z_bru(loop_start_restore); | |
| __ z_nop(); | |
| __ z_ldr(Z_FARG4, floatSlot); | |
| __ z_bru(loop_start_restore); | |
| __ z_nop(); | |
| __ align(16); | |
| __ bind(move_floatSlot_to_FARG); | |
| __ z_stg(signature, d_signature, Z_SP); // Spill since signature == Z_R1_scratch. | |
| __ z_lg(Z_R0_scratch, d_fpcnt, Z_SP); // Need old value for indexing. | |
| __ add2mem_64(Address(Z_SP, d_fpcnt), 1, Z_R1_scratch); // Increment index. | |
| __ z_larl(Z_R1_scratch, farg_caselist); | |
| __ z_sllg(Z_R0_scratch, Z_R0_scratch, LogSizeOfCase); | |
| __ z_agr(Z_R1_scratch, Z_R0_scratch); | |
| __ z_bcr(Assembler::bcondAlways, Z_R1_scratch); | |
| BLOCK_COMMENT("} slow_signature_handler"); | |
| return __ addr_at(entry_offset); | |
| } | |
| address TemplateInterpreterGenerator::generate_result_handler_for (BasicType type) { | |
| address entry = __ pc(); | |
| assert(Z_tos == Z_RET, "Result handler: must move result!"); | |
| assert(Z_ftos == Z_FRET, "Result handler: must move float result!"); | |
| switch (type) { | |
| case T_BOOLEAN: | |
| __ c2bool(Z_tos); | |
| break; | |
| case T_CHAR: | |
| __ and_imm(Z_tos, 0xffff); | |
| break; | |
| case T_BYTE: | |
| __ z_lbr(Z_tos, Z_tos); | |
| break; | |
| case T_SHORT: | |
| __ z_lhr(Z_tos, Z_tos); | |
| break; | |
| case T_INT: | |
| case T_LONG: | |
| case T_VOID: | |
| case T_FLOAT: | |
| case T_DOUBLE: | |
| break; | |
| case T_OBJECT: | |
| // Retrieve result from frame... | |
| __ mem2reg_opt(Z_tos, Address(Z_fp, oop_tmp_offset)); | |
| // and verify it. | |
| __ verify_oop(Z_tos); | |
| break; | |
| default: | |
| ShouldNotReachHere(); | |
| } | |
| __ z_br(Z_R14); // Return from result handler. | |
| return entry; | |
| } | |
| // Abstract method entry. | |
| // Attempt to execute abstract method. Throw exception. | |
| address TemplateInterpreterGenerator::generate_abstract_entry(void) { | |
| unsigned int entry_offset = __ offset(); | |
| // Caller could be the call_stub or a compiled method (x86 version is wrong!). | |
| BLOCK_COMMENT("abstract_entry {"); | |
| // Implement call of InterpreterRuntime::throw_AbstractMethodError. | |
| __ set_top_ijava_frame_at_SP_as_last_Java_frame(Z_SP, Z_R1); | |
| __ save_return_pc(); // Save Z_R14. | |
| __ push_frame_abi160(0); // Without new frame the RT call could overwrite the saved Z_R14. | |
| __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_AbstractMethodErrorWithMethod), | |
| Z_thread, Z_method); | |
| __ pop_frame(); | |
| __ restore_return_pc(); // Restore Z_R14. | |
| __ reset_last_Java_frame(); | |
| // Restore caller sp for c2i case. | |
| __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. | |
| // branch to SharedRuntime::generate_forward_exception() which handles all possible callers, | |
| // i.e. call stub, compiled method, interpreted method. | |
| __ load_absolute_address(Z_tmp_1, StubRoutines::forward_exception_entry()); | |
| __ z_br(Z_tmp_1); | |
| BLOCK_COMMENT("} abstract_entry"); | |
| return __ addr_at(entry_offset); | |
| } | |
| address TemplateInterpreterGenerator::generate_Reference_get_entry(void) { | |
| // Inputs: | |
| // Z_ARG1 - receiver | |
| // | |
| // What we do: | |
| // - Load the referent field address. | |
| // - Load the value in the referent field. | |
| // - Pass that value to the pre-barrier. | |
| // | |
| // In the case of G1 this will record the value of the | |
| // referent in an SATB buffer if marking is active. | |
| // This will cause concurrent marking to mark the referent | |
| // field as live. | |
| Register scratch1 = Z_tmp_2; | |
| Register scratch2 = Z_tmp_3; | |
| Register pre_val = Z_RET; // return value | |
| // Z_esp is callers operand stack pointer, i.e. it points to the parameters. | |
| Register Rargp = Z_esp; | |
| Label slow_path; | |
| address entry = __ pc(); | |
| const int referent_offset = java_lang_ref_Reference::referent_offset(); | |
| BLOCK_COMMENT("Reference_get {"); | |
| // If the receiver is null then it is OK to jump to the slow path. | |
| __ load_and_test_long(pre_val, Address(Rargp, Interpreter::stackElementSize)); // Get receiver. | |
| __ z_bre(slow_path); | |
| // Load the value of the referent field. | |
| __ load_heap_oop(pre_val, Address(pre_val, referent_offset), scratch1, scratch2, ON_WEAK_OOP_REF); | |
| // Restore caller sp for c2i case. | |
| __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. | |
| __ z_br(Z_R14); | |
| // Branch to previously generated regular method entry. | |
| __ bind(slow_path); | |
| address meth_entry = Interpreter::entry_for_kind(Interpreter::zerolocals); | |
| __ jump_to_entry(meth_entry, Z_R1); | |
| BLOCK_COMMENT("} Reference_get"); | |
| return entry; | |
| } | |
| address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { | |
| address entry = __ pc(); | |
| DEBUG_ONLY(__ verify_esp(Z_esp, Z_ARG5)); | |
| // Restore bcp under the assumption that the current frame is still | |
| // interpreted. | |
| __ restore_bcp(); | |
| // Expression stack must be empty before entering the VM if an | |
| // exception happened. | |
| __ empty_expression_stack(); | |
| // Throw exception. | |
| __ call_VM(noreg, | |
| CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_StackOverflowError)); | |
| return entry; | |
| } | |
| // | |
| // Args: | |
| // Z_ARG2: oop of array | |
| // Z_ARG3: aberrant index | |
| // | |
| address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler() { | |
| address entry = __ pc(); | |
| address excp = CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException); | |
| // Expression stack must be empty before entering the VM if an | |
| // exception happened. | |
| __ empty_expression_stack(); | |
| // Setup parameters. | |
| // Pass register with array to create more detailed exceptions. | |
| __ call_VM(noreg, excp, Z_ARG2, Z_ARG3); | |
| return entry; | |
| } | |
| address TemplateInterpreterGenerator::generate_ClassCastException_handler() { | |
| address entry = __ pc(); | |
| // Object is at TOS. | |
| __ pop_ptr(Z_ARG2); | |
| // Expression stack must be empty before entering the VM if an | |
| // exception happened. | |
| __ empty_expression_stack(); | |
| __ call_VM(Z_ARG1, | |
| CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ClassCastException), | |
| Z_ARG2); | |
| DEBUG_ONLY(__ should_not_reach_here();) | |
| return entry; | |
| } | |
| address TemplateInterpreterGenerator::generate_exception_handler_common(const char* name, const char* message, bool pass_oop) { | |
| assert(!pass_oop || message == nullptr, "either oop or message but not both"); | |
| address entry = __ pc(); | |
| BLOCK_COMMENT("exception_handler_common {"); | |
| // Expression stack must be empty before entering the VM if an | |
| // exception happened. | |
| __ empty_expression_stack(); | |
| if (name != nullptr) { | |
| __ load_absolute_address(Z_ARG2, (address)name); | |
| } else { | |
| __ clear_reg(Z_ARG2, true, false); | |
| } | |
| if (pass_oop) { | |
| __ call_VM(Z_tos, | |
| CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), | |
| Z_ARG2, Z_tos /*object (see TT::aastore())*/); | |
| } else { | |
| if (message != nullptr) { | |
| __ load_absolute_address(Z_ARG3, (address)message); | |
| } else { | |
| __ clear_reg(Z_ARG3, true, false); | |
| } | |
| __ call_VM(Z_tos, | |
| CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), | |
| Z_ARG2, Z_ARG3); | |
| } | |
| // Throw exception. | |
| __ load_absolute_address(Z_R1_scratch, Interpreter::throw_exception_entry()); | |
| __ z_br(Z_R1_scratch); | |
| BLOCK_COMMENT("} exception_handler_common"); | |
| return entry; | |
| } | |
| address TemplateInterpreterGenerator::generate_return_entry_for (TosState state, int step, size_t index_size) { | |
| address entry = __ pc(); | |
| BLOCK_COMMENT("return_entry {"); | |
| // Pop i2c extension or revert top-2-parent-resize done by interpreted callees. | |
| Register sp_before_i2c_extension = Z_bcp; | |
| __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. | |
| __ z_lg(sp_before_i2c_extension, Address(Z_fp, _z_ijava_state_neg(top_frame_sp))); | |
| __ z_slag(sp_before_i2c_extension, sp_before_i2c_extension, Interpreter::logStackElementSize); | |
| __ z_agr(sp_before_i2c_extension, Z_fp); | |
| __ resize_frame_absolute(sp_before_i2c_extension, Z_locals/*tmp*/, true/*load_fp*/); | |
| // TODO(ZASM): necessary?? | |
| // // and null it as marker that esp is now tos until next java call | |
| // __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); | |
| __ restore_bcp(); | |
| __ restore_locals(); | |
| __ restore_esp(); | |
| if (state == atos) { | |
| __ profile_return_type(Z_tmp_1, Z_tos, Z_tmp_2); | |
| } | |
| Register cache = Z_tmp_1; | |
| Register size = Z_tmp_2; | |
| Register index = Z_tmp_2; | |
| if (index_size == sizeof(u4)) { | |
| __ load_resolved_indy_entry(cache, index); | |
| __ z_llgh(size, in_bytes(ResolvedIndyEntry::num_parameters_offset()), cache); | |
| } else { | |
| assert(index_size == sizeof(u2), "Can only be u2"); | |
| __ load_method_entry(cache, index); | |
| __ load_sized_value(size, Address(cache, in_bytes(ResolvedMethodEntry::num_parameters_offset())), sizeof(u2), false /*is_signed*/); | |
| } | |
| __ z_sllg(size, size, Interpreter::logStackElementSize); // Each argument size in bytes. | |
| __ z_agr(Z_esp, size); // Pop arguments. | |
| __ check_and_handle_popframe(Z_thread); | |
| __ check_and_handle_earlyret(Z_thread); | |
| __ dispatch_next(state, step); | |
| BLOCK_COMMENT("} return_entry"); | |
| return entry; | |
| } | |
| address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, | |
| int step, | |
| address continuation) { | |
| address entry = __ pc(); | |
| BLOCK_COMMENT("deopt_entry {"); | |
| // TODO(ZASM): necessary? null last_sp until next java call | |
| // __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); | |
| __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. | |
| __ restore_bcp(); | |
| __ restore_locals(); | |
| __ restore_esp(); | |
| // Handle exceptions. | |
| { | |
| Label L; | |
| __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception)); | |
| __ z_bre(L); | |
| __ call_VM(noreg, | |
| CAST_FROM_FN_PTR(address, | |
| InterpreterRuntime::throw_pending_exception)); | |
| __ should_not_reach_here(); | |
| __ bind(L); | |
| } | |
| if (continuation == nullptr) { | |
| __ dispatch_next(state, step); | |
| } else { | |
| __ jump_to_entry(continuation, Z_R1_scratch); | |
| } | |
| BLOCK_COMMENT("} deopt_entry"); | |
| return entry; | |
| } | |
| address TemplateInterpreterGenerator::generate_safept_entry_for (TosState state, | |
| address runtime_entry) { | |
| address entry = __ pc(); | |
| __ push(state); | |
| __ call_VM(noreg, runtime_entry); | |
| __ dispatch_via(vtos, Interpreter::_normal_table.table_for (vtos)); | |
| return entry; | |
| } | |
| address TemplateInterpreterGenerator::generate_cont_resume_interpreter_adapter() { | |
| return nullptr; | |
| } | |
| // | |
| // Helpers for commoning out cases in the various type of method entries. | |
| // | |
| // Increment invocation count & check for overflow. | |
| // | |
| // Note: checking for negative value instead of overflow | |
| // so we have a 'sticky' overflow test. | |
| // | |
| // Z_ARG2: method (see generate_fixed_frame()) | |
| // | |
| void TemplateInterpreterGenerator::generate_counter_incr(Label* overflow) { | |
| Label done; | |
| Register method = Z_ARG2; // Generate_fixed_frame() copies Z_method into Z_ARG2. | |
| Register m_counters = Z_ARG4; | |
| BLOCK_COMMENT("counter_incr {"); | |
| // Note: In tiered we increment either counters in method or in MDO depending | |
| // if we are profiling or not. | |
| int increment = InvocationCounter::count_increment; | |
| if (ProfileInterpreter) { | |
| NearLabel no_mdo; | |
| Register mdo = m_counters; | |
| // Are we profiling? | |
| __ load_and_test_long(mdo, method2_(method, method_data)); | |
| __ branch_optimized(Assembler::bcondZero, no_mdo); | |
| // Increment counter in the MDO. | |
| const Address mdo_invocation_counter(mdo, MethodData::invocation_counter_offset() + | |
| InvocationCounter::counter_offset()); | |
| const Address mask(mdo, MethodData::invoke_mask_offset()); | |
| __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, | |
| Z_R1_scratch, false, Assembler::bcondZero, | |
| overflow); | |
| __ z_bru(done); | |
| __ bind(no_mdo); | |
| } | |
| // Increment counter in MethodCounters. | |
| const Address invocation_counter(m_counters, | |
| MethodCounters::invocation_counter_offset() + | |
| InvocationCounter::counter_offset()); | |
| // Get address of MethodCounters object. | |
| __ get_method_counters(method, m_counters, done); | |
| const Address mask(m_counters, MethodCounters::invoke_mask_offset()); | |
| __ increment_mask_and_jump(invocation_counter, | |
| increment, mask, | |
| Z_R1_scratch, false, Assembler::bcondZero, | |
| overflow); | |
| __ bind(done); | |
| BLOCK_COMMENT("} counter_incr"); | |
| } | |
| void TemplateInterpreterGenerator::generate_counter_overflow(Label& do_continue) { | |
| // InterpreterRuntime::frequency_counter_overflow takes two | |
| // arguments, the first (thread) is passed by call_VM, the second | |
| // indicates if the counter overflow occurs at a backwards branch | |
| // (null bcp). We pass zero for it. The call returns the address | |
| // of the verified entry point for the method or null if the | |
| // compilation did not complete (either went background or bailed | |
| // out). | |
| __ clear_reg(Z_ARG2); | |
| __ call_VM(noreg, | |
| CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), | |
| Z_ARG2); | |
| __ z_bru(do_continue); | |
| } | |
| void TemplateInterpreterGenerator::generate_stack_overflow_check(Register frame_size, Register tmp1) { | |
| Register tmp2 = Z_R1_scratch; | |
| const int page_size = (int)os::vm_page_size(); | |
| NearLabel after_frame_check; | |
| BLOCK_COMMENT("stack_overflow_check {"); | |
| assert_different_registers(frame_size, tmp1); | |
| // Stack banging is sufficient overflow check if frame_size < page_size. | |
| if (Immediate::is_uimm(page_size, 15)) { | |
| __ z_chi(frame_size, page_size); | |
| __ z_brl(after_frame_check); | |
| } else { | |
| __ load_const_optimized(tmp1, page_size); | |
| __ compareU32_and_branch(frame_size, tmp1, Assembler::bcondLow, after_frame_check); | |
| } | |
| // Get the stack base, and in debug, verify it is non-zero. | |
| __ z_lg(tmp1, thread_(stack_base)); | |
| #ifdef ASSERT | |
| address reentry = nullptr; | |
| NearLabel base_not_zero; | |
| __ compareU64_and_branch(tmp1, (intptr_t)0L, Assembler::bcondNotEqual, base_not_zero); | |
| reentry = __ stop_chain_static(reentry, "stack base is zero in generate_stack_overflow_check"); | |
| __ bind(base_not_zero); | |
| #endif | |
| // Get the stack size, and in debug, verify it is non-zero. | |
| assert(sizeof(size_t) == sizeof(intptr_t), "wrong load size"); | |
| __ z_lg(tmp2, thread_(stack_size)); | |
| #ifdef ASSERT | |
| NearLabel size_not_zero; | |
| __ compareU64_and_branch(tmp2, (intptr_t)0L, Assembler::bcondNotEqual, size_not_zero); | |
| reentry = __ stop_chain_static(reentry, "stack size is zero in generate_stack_overflow_check"); | |
| __ bind(size_not_zero); | |
| #endif | |
| // Compute the beginning of the protected zone minus the requested frame size. | |
| __ z_sgr(tmp1, tmp2); | |
| __ add2reg(tmp1, StackOverflow::stack_guard_zone_size()); | |
| // Add in the size of the frame (which is the same as subtracting it from the | |
| // SP, which would take another register. | |
| __ z_agr(tmp1, frame_size); | |
| // The frame is greater than one page in size, so check against | |
| // the bottom of the stack. | |
| __ compareU64_and_branch(Z_SP, tmp1, Assembler::bcondHigh, after_frame_check); | |
| // The stack will overflow, throw an exception. | |
| // Restore SP to sender's sp. This is necessary if the sender's frame is an | |
| // extended compiled frame (see gen_c2i_adapter()) and safer anyway in case of | |
| // JSR292 adaptations. | |
| __ resize_frame_absolute(Z_R10, tmp1, true/*load_fp*/); | |
| // Note also that the restored frame is not necessarily interpreted. | |
| // Use the shared runtime version of the StackOverflowError. | |
| assert(SharedRuntime::throw_StackOverflowError_entry() != nullptr, "stub not yet generated"); | |
| AddressLiteral stub(SharedRuntime::throw_StackOverflowError_entry()); | |
| __ load_absolute_address(tmp1, SharedRuntime::throw_StackOverflowError_entry()); | |
| __ z_br(tmp1); | |
| // If you get to here, then there is enough stack space. | |
| __ bind(after_frame_check); | |
| BLOCK_COMMENT("} stack_overflow_check"); | |
| } | |
| // Allocate monitor and lock method (asm interpreter). | |
| // | |
| // Args: | |
| // Z_locals: locals | |
| void TemplateInterpreterGenerator::lock_method(void) { | |
| BLOCK_COMMENT("lock_method {"); | |
| // Synchronize method. | |
| const Register method = Z_tmp_2; | |
| __ get_method(method); | |
| #ifdef ASSERT | |
| address reentry = nullptr; | |
| { | |
| Label L; | |
| __ testbit_ushort(method2_(method, access_flags), JVM_ACC_SYNCHRONIZED_BIT); | |
| __ z_btrue(L); | |
| reentry = __ stop_chain_static(reentry, "method doesn't need synchronization"); | |
| __ bind(L); | |
| } | |
| #endif // ASSERT | |
| // Get synchronization object. | |
| const Register object = Z_tmp_2; | |
| { | |
| Label done; | |
| Label static_method; | |
| __ testbit_ushort(method2_(method, access_flags), JVM_ACC_STATIC_BIT); | |
| __ z_btrue(static_method); | |
| // non-static method: Load receiver obj from stack. | |
| __ mem2reg_opt(object, Address(Z_locals, Interpreter::local_offset_in_bytes(0))); | |
| __ z_bru(done); | |
| __ bind(static_method); | |
| // Lock the java mirror. | |
| // Load mirror from interpreter frame. | |
| __ z_lg(object, _z_ijava_state_neg(mirror), Z_fp); | |
| #ifdef ASSERT | |
| { | |
| NearLabel L; | |
| __ compare64_and_branch(object, (intptr_t) 0, Assembler::bcondNotEqual, L); | |
| reentry = __ stop_chain_static(reentry, "synchronization object is null"); | |
| __ bind(L); | |
| } | |
| #endif // ASSERT | |
| __ bind(done); | |
| } | |
| __ add_monitor_to_stack(true, Z_ARG3, Z_ARG4, Z_ARG5); // Allocate monitor elem. | |
| // Store object and lock it. | |
| __ get_monitors(Z_tmp_1); | |
| __ reg2mem_opt(object, Address(Z_tmp_1, BasicObjectLock::obj_offset())); | |
| __ lock_object(Z_tmp_1, object); | |
| BLOCK_COMMENT("} lock_method"); | |
| } | |
| // Generate a fixed interpreter frame. This is identical setup for | |
| // interpreted methods and for native methods hence the shared code. | |
| // | |
| // Registers alive | |
| // Z_thread - JavaThread* | |
| // Z_SP - old stack pointer | |
| // Z_method - callee's method | |
| // Z_esp - parameter list (slot 'above' last param) | |
| // Z_R14 - return pc, to be stored in caller's frame | |
| // Z_R10 - sender sp, note: Z_tmp_1 is Z_R10! | |
| // | |
| // Registers updated | |
| // Z_SP - new stack pointer | |
| // Z_esp - callee's operand stack pointer | |
| // points to the slot above the value on top | |
| // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord) | |
| // Z_bcp - the bytecode pointer | |
| // Z_fp - the frame pointer, thereby killing Z_method | |
| // Z_ARG2 - copy of Z_method | |
| // | |
| void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { | |
| // stack layout | |
| // | |
| // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (see note below) | |
| // [F1's operand stack (unused)] | |
| // [F1's outgoing Java arguments] <-- Z_esp | |
| // [F1's operand stack (non args)] | |
| // [monitors] (optional) | |
| // [IJAVA_STATE] | |
| // | |
| // F2 [PARENT_IJAVA_FRAME_ABI] | |
| // ... | |
| // | |
| // 0x000 | |
| // | |
| // Note: Z_R10, the sender sp, will be below Z_SP if F1 was extended by a c2i adapter. | |
| //============================================================================= | |
| // Allocate space for locals other than the parameters, the | |
| // interpreter state, monitors, and the expression stack. | |
| const Register local_count = Z_ARG5; | |
| const Register fp = Z_tmp_2; | |
| const Register const_method = Z_ARG1; | |
| BLOCK_COMMENT("generate_fixed_frame {"); | |
| { | |
| // local registers | |
| const Register top_frame_size = Z_ARG2; | |
| const Register sp_after_resize = Z_ARG3; | |
| const Register max_stack = Z_ARG4; | |
| __ z_lg(const_method, Address(Z_method, Method::const_offset())); | |
| __ z_llgh(max_stack, Address(const_method, ConstMethod::size_of_parameters_offset())); | |
| __ z_sllg(Z_locals /*parameter_count bytes*/, max_stack /*parameter_count*/, LogBytesPerWord); | |
| if (native_call) { | |
| // If we're calling a native method, we replace max_stack (which is | |
| // zero) with space for the worst-case signature handler varargs | |
| // vector, which is: | |
| // max_stack = max(Argument::n_register_parameters, parameter_count+2); | |
| // | |
| // We add two slots to the parameter_count, one for the jni | |
| // environment and one for a possible native mirror. We allocate | |
| // space for at least the number of ABI registers, even though | |
| // InterpreterRuntime::slow_signature_handler won't write more than | |
| // parameter_count+2 words when it creates the varargs vector at the | |
| // top of the stack. The generated slow signature handler will just | |
| // load trash into registers beyond the necessary number. We're | |
| // still going to cut the stack back by the ABI register parameter | |
| // count so as to get SP+16 pointing at the ABI outgoing parameter | |
| // area, so we need to allocate at least that much even though we're | |
| // going to throw it away. | |
| // | |
| __ add2reg(max_stack, 2); | |
| NearLabel passing_args_on_stack; | |
| // max_stack in bytes | |
| __ z_sllg(max_stack, max_stack, LogBytesPerWord); | |
| int argument_registers_in_bytes = Argument::n_register_parameters << LogBytesPerWord; | |
| __ compare64_and_branch(max_stack, argument_registers_in_bytes, Assembler::bcondNotLow, passing_args_on_stack); | |
| __ load_const_optimized(max_stack, argument_registers_in_bytes); | |
| __ bind(passing_args_on_stack); | |
| } else { | |
| // !native_call | |
| // local_count = method->constMethod->max_locals(); | |
| __ z_llgh(local_count, Address(const_method, ConstMethod::size_of_locals_offset())); | |
| // Calculate number of non-parameter locals (in slots): | |
| __ z_sgr(local_count, max_stack); | |
| // max_stack = method->max_stack(); | |
| __ z_llgh(max_stack, Address(const_method, ConstMethod::max_stack_offset())); | |
| // max_stack in bytes | |
| __ z_sllg(max_stack, max_stack, LogBytesPerWord); | |
| } | |
| // Resize (i.e. normally shrink) the top frame F1 ... | |
| // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 | |
| // F1's operand stack (free) | |
| // ... | |
| // F1's operand stack (free) <-- Z_esp | |
| // F1's outgoing Java arg m | |
| // ... | |
| // F1's outgoing Java arg 0 | |
| // ... | |
| // | |
| // ... into a parent frame (Z_R10 holds F1's SP before any modification, see also above) | |
| // | |
| // +......................+ | |
| // : : <-- Z_R10, saved below as F0's z_ijava_state.sender_sp | |
| // : : | |
| // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_SP \ | |
| // F0's non arg local | = delta | |
| // ... | | |
| // F0's non arg local <-- Z_esp / | |
| // F1's outgoing Java arg m | |
| // ... | |
| // F1's outgoing Java arg 0 | |
| // ... | |
| // | |
| // then push the new top frame F0. | |
| // | |
| // F0 [TOP_IJAVA_FRAME_ABI] = frame::z_top_ijava_frame_abi_size \ | |
| // [operand stack] = max_stack | = top_frame_size | |
| // [IJAVA_STATE] = frame::z_ijava_state_size / | |
| // sp_after_resize = Z_esp - delta | |
| // | |
| // delta = PARENT_IJAVA_FRAME_ABI + (locals_count - params_count) | |
| __ add2reg(sp_after_resize, (Interpreter::stackElementSize) - (frame::z_parent_ijava_frame_abi_size), Z_esp); | |
| if (!native_call) { | |
| __ z_sllg(Z_R0_scratch, local_count, LogBytesPerWord); // Params have already been subtracted from local_count. | |
| __ z_slgr(sp_after_resize, Z_R0_scratch); | |
| } | |
| // top_frame_size = TOP_IJAVA_FRAME_ABI + max_stack + size of interpreter state | |
| __ add2reg(top_frame_size, | |
| frame::z_top_ijava_frame_abi_size + | |
| frame::z_ijava_state_size, | |
| max_stack); | |
| if (!native_call) { | |
| // Stack overflow check. | |
| // Native calls don't need the stack size check since they have no | |
| // expression stack and the arguments are already on the stack and | |
| // we only add a handful of words to the stack. | |
| Register frame_size = max_stack; // Reuse the register for max_stack. | |
| __ z_lgr(frame_size, Z_SP); | |
| __ z_sgr(frame_size, sp_after_resize); | |
| __ z_agr(frame_size, top_frame_size); | |
| generate_stack_overflow_check(frame_size, fp/*tmp1*/); | |
| } | |
| // asm_assert* is a nop in product builds | |
| NOT_PRODUCT(__ z_cg(Z_R14, _z_common_abi(return_pc), Z_SP)); | |
| NOT_PRODUCT(__ asm_assert(Assembler::bcondEqual, "killed Z_R14", 0)); | |
| __ resize_frame_absolute(sp_after_resize, fp, true); | |
| __ save_return_pc(Z_R14); | |
| // ... and push the new frame F0. | |
| __ push_frame(top_frame_size, fp, true /*copy_sp*/, false); | |
| } | |
| //============================================================================= | |
| // Initialize the new frame F0: initialize interpreter state. | |
| { | |
| // locals | |
| const Register local_addr = Z_ARG4; | |
| BLOCK_COMMENT("generate_fixed_frame: initialize interpreter state {"); | |
| #ifdef ASSERT | |
| // Set the magic number (using local_addr as tmp register). | |
| __ load_const_optimized(local_addr, frame::z_istate_magic_number); | |
| __ z_stg(local_addr, _z_ijava_state_neg(magic), fp); | |
| #endif | |
| // Save sender SP from F1 (i.e. before it was potentially modified by an | |
| // adapter) into F0's interpreter state. We use it as well to revert | |
| // resizing the frame above. | |
| __ z_stg(Z_R10, _z_ijava_state_neg(sender_sp), fp); | |
| // Load cp cache and save it at the end of this block. | |
| __ z_lg(Z_R1_scratch, Address(const_method, ConstMethod::constants_offset())); | |
| __ z_lg(Z_R1_scratch, Address(Z_R1_scratch, ConstantPool::cache_offset())); | |
| // z_ijava_state->method = method; | |
| __ z_stg(Z_method, _z_ijava_state_neg(method), fp); | |
| // Point locals at the first argument. Method's locals are the | |
| // parameters on top of caller's expression stack. | |
| // Tos points past last Java argument. | |
| __ z_agr(Z_locals, Z_esp); | |
| // z_ijava_state->locals - i*BytesPerWord points to i-th Java local (i starts at 0) | |
| // z_ijava_state->locals = Z_esp + parameter_count bytes | |
| __ z_sgrk(Z_R0, Z_locals, fp); // Z_R0 = Z_locals - fp(); | |
| __ z_srlg(Z_R0, Z_R0, Interpreter::logStackElementSize); | |
| // Store relativized Z_locals, see frame::interpreter_frame_locals(). | |
| __ z_stg(Z_R0, _z_ijava_state_neg(locals), fp); | |
| // z_ijava_state->oop_temp = nullptr; | |
| __ store_const(Address(fp, oop_tmp_offset), 0); | |
| // Initialize z_ijava_state->mdx. | |
| Register Rmdp = Z_bcp; | |
| // native_call: assert that mdo is null | |
| const bool check_for_mdo = !native_call DEBUG_ONLY(|| native_call); | |
| if (ProfileInterpreter && check_for_mdo) { | |
| Label get_continue; | |
| __ load_and_test_long(Rmdp, method_(method_data)); | |
| __ z_brz(get_continue); | |
| DEBUG_ONLY(if (native_call) __ stop("native methods don't have a mdo")); | |
| __ add2reg(Rmdp, in_bytes(MethodData::data_offset())); | |
| __ bind(get_continue); | |
| } | |
| __ z_stg(Rmdp, _z_ijava_state_neg(mdx), fp); | |
| // Initialize z_ijava_state->bcp and Z_bcp. | |
| if (native_call) { | |
| __ clear_reg(Z_bcp); // Must initialize. Will get written into frame where GC reads it. | |
| } else { | |
| __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset()), const_method); | |
| } | |
| __ z_stg(Z_bcp, _z_ijava_state_neg(bcp), fp); | |
| // no monitors and empty operand stack | |
| // => z_ijava_state->monitors points to the top slot in IJAVA_STATE. | |
| // => Z_ijava_state->esp points one slot above into the operand stack. | |
| // z_ijava_state->monitors = fp - frame::z_ijava_state_size - Interpreter::stackElementSize; | |
| // z_ijava_state->esp = Z_esp = z_ijava_state->monitors; | |
| __ add2reg(Z_esp, -frame::z_ijava_state_size, fp); | |
| __ z_sgrk(Z_R0, Z_esp, fp); | |
| __ z_srag(Z_R0, Z_R0, Interpreter::logStackElementSize); | |
| __ z_stg(Z_R0, _z_ijava_state_neg(monitors), fp); | |
| __ add2reg(Z_esp, -Interpreter::stackElementSize); | |
| __ save_esp(fp); | |
| // z_ijava_state->cpoolCache = Z_R1_scratch (see load above); | |
| __ z_stg(Z_R1_scratch, _z_ijava_state_neg(cpoolCache), fp); | |
| // Get mirror and store it in the frame as GC root for this Method*. | |
| __ load_mirror_from_const_method(Z_R1_scratch, const_method); | |
| __ z_stg(Z_R1_scratch, _z_ijava_state_neg(mirror), fp); | |
| BLOCK_COMMENT("} generate_fixed_frame: initialize interpreter state"); | |
| //============================================================================= | |
| if (!native_call) { | |
| // Local_count is already num_locals_slots - num_param_slots. | |
| // Start of locals: local_addr = Z_locals - locals size + 1 slot | |
| __ z_llgh(Z_R0_scratch, Address(const_method, ConstMethod::size_of_locals_offset())); | |
| __ add2reg(local_addr, BytesPerWord, Z_locals); | |
| __ z_sllg(Z_R0_scratch, Z_R0_scratch, LogBytesPerWord); | |
| __ z_sgr(local_addr, Z_R0_scratch); | |
| __ Clear_Array(local_count, local_addr, Z_ARG2); | |
| } | |
| } | |
| // Finally set the frame pointer, destroying Z_method. | |
| assert(Z_fp == Z_method, "maybe set Z_fp earlier if other register than Z_method"); | |
| // Oprofile analysis suggests to keep a copy in a register to be used by | |
| // generate_counter_incr(). | |
| __ z_lgr(Z_ARG2, Z_method); | |
| __ z_lgr(Z_fp, fp); | |
| BLOCK_COMMENT("} generate_fixed_frame"); | |
| } | |
| // Various method entries | |
| // Math function, frame manager must set up an interpreter state, etc. | |
| address TemplateInterpreterGenerator::generate_math_entry(AbstractInterpreter::MethodKind kind) { | |
| // Decide what to do: Use same platform specific instructions and runtime calls as compilers. | |
| bool use_instruction = false; | |
| address runtime_entry = nullptr; | |
| int num_args = 1; | |
| bool double_precision = true; | |
| // s390 specific: | |
| switch (kind) { | |
| case Interpreter::java_lang_math_sqrt: | |
| case Interpreter::java_lang_math_abs: use_instruction = true; break; | |
| case Interpreter::java_lang_math_fmaF: | |
| case Interpreter::java_lang_math_fmaD: use_instruction = UseFMA; break; | |
| default: break; // Fall back to runtime call. | |
| } | |
| switch (kind) { | |
| case Interpreter::java_lang_math_sin : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsin); break; | |
| case Interpreter::java_lang_math_cos : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dcos); break; | |
| case Interpreter::java_lang_math_tan : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dtan); break; | |
| case Interpreter::java_lang_math_tanh : /* run interpreted */ break; | |
| case Interpreter::java_lang_math_cbrt : /* run interpreted */ break; | |
| case Interpreter::java_lang_math_abs : /* run interpreted */ break; | |
| case Interpreter::java_lang_math_sqrt : /* runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dsqrt); not available */ break; | |
| case Interpreter::java_lang_math_log : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog); break; | |
| case Interpreter::java_lang_math_log10: runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dlog10); break; | |
| case Interpreter::java_lang_math_pow : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dpow); num_args = 2; break; | |
| case Interpreter::java_lang_math_exp : runtime_entry = CAST_FROM_FN_PTR(address, SharedRuntime::dexp); break; | |
| case Interpreter::java_lang_math_fmaF : /* run interpreted */ num_args = 3; double_precision = false; break; | |
| case Interpreter::java_lang_math_fmaD : /* run interpreted */ num_args = 3; break; | |
| default: ShouldNotReachHere(); | |
| } | |
| // Use normal entry if neither instruction nor runtime call is used. | |
| if (!use_instruction && runtime_entry == nullptr) return nullptr; | |
| address entry = __ pc(); | |
| if (use_instruction) { | |
| switch (kind) { | |
| case Interpreter::java_lang_math_sqrt: | |
| // Can use memory operand directly. | |
| __ z_sqdb(Z_FRET, Interpreter::stackElementSize, Z_esp); | |
| break; | |
| case Interpreter::java_lang_math_abs: | |
| // Load operand from stack. | |
| __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); | |
| __ z_lpdbr(Z_FRET); | |
| break; | |
| case Interpreter::java_lang_math_fmaF: | |
| __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3 | |
| __ mem2freg_opt(Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize)); // arg1 | |
| __ z_maeb(Z_FRET, Z_FARG2, Address(Z_esp, 2 * Interpreter::stackElementSize)); | |
| break; | |
| case Interpreter::java_lang_math_fmaD: | |
| __ mem2freg_opt(Z_FRET, Address(Z_esp, Interpreter::stackElementSize)); // result reg = arg3 | |
| __ mem2freg_opt(Z_FARG2, Address(Z_esp, 5 * Interpreter::stackElementSize)); // arg1 | |
| __ z_madb(Z_FRET, Z_FARG2, Address(Z_esp, 3 * Interpreter::stackElementSize)); | |
| break; | |
| default: ShouldNotReachHere(); | |
| } | |
| } else { | |
| // Load arguments | |
| assert(num_args <= 4, "passed in registers"); | |
| if (double_precision) { | |
| int offset = (2 * num_args - 1) * Interpreter::stackElementSize; | |
| for (int i = 0; i < num_args; ++i) { | |
| __ mem2freg_opt(as_FloatRegister(Z_FARG1->encoding() + 2 * i), Address(Z_esp, offset)); | |
| offset -= 2 * Interpreter::stackElementSize; | |
| } | |
| } else { | |
| int offset = num_args * Interpreter::stackElementSize; | |
| for (int i = 0; i < num_args; ++i) { | |
| __ mem2freg_opt(as_FloatRegister(Z_FARG1->encoding() + 2 * i), Address(Z_esp, offset)); | |
| offset -= Interpreter::stackElementSize; | |
| } | |
| } | |
| // Call runtime | |
| __ save_return_pc(); // Save Z_R14. | |
| __ push_frame_abi160(0); // Without new frame the RT call could overwrite the saved Z_R14. | |
| __ call_VM_leaf(runtime_entry); | |
| __ pop_frame(); | |
| __ restore_return_pc(); // Restore Z_R14. | |
| } | |
| // Pop c2i arguments (if any) off when we return. | |
| __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. | |
| __ z_br(Z_R14); | |
| return entry; | |
| } | |
| // Interpreter stub for calling a native method. (asm interpreter). | |
| // This sets up a somewhat different looking stack for calling the | |
| // native method than the typical interpreter frame setup. | |
| address TemplateInterpreterGenerator::generate_native_entry(bool synchronized) { | |
| // Determine code generation flags. | |
| bool inc_counter = UseCompiler || CountCompiledCalls; | |
| // Interpreter entry for ordinary Java methods. | |
| // | |
| // Registers alive | |
| // Z_SP - stack pointer | |
| // Z_thread - JavaThread* | |
| // Z_method - callee's method (method to be invoked) | |
| // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg. | |
| // Z_R10 - sender sp (before modifications, e.g. by c2i adapter | |
| // and as well by generate_fixed_frame below) | |
| // Z_R14 - return address to caller (call_stub or c2i_adapter) | |
| // | |
| // Registers updated | |
| // Z_SP - stack pointer | |
| // Z_fp - callee's framepointer | |
| // Z_esp - callee's operand stack pointer | |
| // points to the slot above the value on top | |
| // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord) | |
| // Z_tos - integer result, if any | |
| // z_ftos - floating point result, if any | |
| // | |
| // Stack layout at this point: | |
| // | |
| // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if | |
| // frame was extended by c2i adapter) | |
| // [outgoing Java arguments] <-- Z_esp | |
| // ... | |
| // PARENT [PARENT_IJAVA_FRAME_ABI] | |
| // ... | |
| // | |
| address entry_point = __ pc(); | |
| // Make sure registers are different! | |
| assert_different_registers(Z_thread, Z_method, Z_esp); | |
| BLOCK_COMMENT("native_entry {"); | |
| // Make sure method is native and not abstract. | |
| #ifdef ASSERT | |
| // _access_flags must be a 16 bit value. | |
| assert(sizeof(AccessFlags) == 2, "testbit_ushort will fail"); | |
| address reentry = nullptr; | |
| { Label L; | |
| __ testbit_ushort(method_(access_flags), JVM_ACC_NATIVE_BIT); | |
| __ z_btrue(L); | |
| reentry = __ stop_chain_static(reentry, "tried to execute non-native method as native"); | |
| __ bind(L); | |
| } | |
| { Label L; | |
| __ testbit_ushort(method_(access_flags), JVM_ACC_ABSTRACT_BIT); | |
| __ z_bfalse(L); | |
| reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract"); | |
| __ bind(L); | |
| } | |
| #endif // ASSERT | |
| // Save the return PC into the callers frame for assertion in generate_fixed_frame. | |
| NOT_PRODUCT(__ save_return_pc(Z_R14)); | |
| // Generate the code to allocate the interpreter stack frame. | |
| generate_fixed_frame(true); | |
| const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset()); | |
| // Since at this point in the method invocation the exception handler | |
| // would try to exit the monitor of synchronized methods which hasn't | |
| // been entered yet, we set the thread local variable | |
| // _do_not_unlock_if_synchronized to true. If any exception was thrown by | |
| // runtime, exception handling i.e. unlock_if_synchronized_method will | |
| // check this thread local flag. | |
| __ z_mvi(do_not_unlock_if_synchronized, true); | |
| // Increment invocation count and check for overflow. | |
| NearLabel invocation_counter_overflow; | |
| if (inc_counter) { | |
| generate_counter_incr(&invocation_counter_overflow); | |
| } | |
| Label continue_after_compile; | |
| __ bind(continue_after_compile); | |
| bang_stack_shadow_pages(true); | |
| // Reset the _do_not_unlock_if_synchronized flag. | |
| __ z_mvi(do_not_unlock_if_synchronized, false); | |
| // Check for synchronized methods. | |
| // This mst happen AFTER invocation_counter check and stack overflow check, | |
| // so method is not locked if overflows. | |
| if (synchronized) { | |
| lock_method(); | |
| } else { | |
| // No synchronization necessary. | |
| #ifdef ASSERT | |
| { Label L; | |
| __ get_method(Z_R1_scratch); | |
| __ testbit_ushort(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT); | |
| __ z_bfalse(L); | |
| reentry = __ stop_chain_static(reentry, "method needs synchronization"); | |
| __ bind(L); | |
| } | |
| #endif // ASSERT | |
| } | |
| // start execution | |
| // jvmti support | |
| __ notify_method_entry(); | |
| //============================================================================= | |
| // Get and call the signature handler. | |
| const Register Rmethod = Z_tmp_2; | |
| const Register signature_handler_entry = Z_tmp_1; | |
| const Register Rresult_handler = Z_tmp_3; | |
| Label call_signature_handler; | |
| assert_different_registers(Z_fp, Rmethod, signature_handler_entry, Rresult_handler); | |
| assert(Rresult_handler->is_nonvolatile(), "Rresult_handler must be in a non-volatile register"); | |
| // Reload method. | |
| __ get_method(Rmethod); | |
| // Check for signature handler. | |
| __ load_and_test_long(signature_handler_entry, method2_(Rmethod, signature_handler)); | |
| __ z_brne(call_signature_handler); | |
| // Method has never been called. Either generate a specialized | |
| // handler or point to the slow one. | |
| __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::prepare_native_call), | |
| Rmethod); | |
| // Reload method. | |
| __ get_method(Rmethod); | |
| // Reload signature handler, it must have been created/assigned in the meantime. | |
| __ z_lg(signature_handler_entry, method2_(Rmethod, signature_handler)); | |
| __ bind(call_signature_handler); | |
| // We have a TOP_IJAVA_FRAME here, which belongs to us. | |
| __ set_top_ijava_frame_at_SP_as_last_Java_frame(Z_SP, Z_R1/*tmp*/); | |
| // Call signature handler and pass locals address in Z_ARG1. | |
| __ z_lgr(Z_ARG1, Z_locals); | |
| __ call_stub(signature_handler_entry); | |
| // Save result handler returned by signature handler. | |
| __ z_lgr(Rresult_handler, Z_RET); | |
| // Reload method (the slow signature handler may block for GC). | |
| __ get_method(Rmethod); | |
| // Pass mirror handle if static call. | |
| { | |
| Label method_is_not_static; | |
| __ testbit_ushort(method2_(Rmethod, access_flags), JVM_ACC_STATIC_BIT); | |
| __ z_bfalse(method_is_not_static); | |
| // Load mirror from interpreter frame. | |
| __ z_lg(Z_R1, _z_ijava_state_neg(mirror), Z_fp); | |
| // z_ijava_state.oop_temp = pool_holder->klass_part()->java_mirror(); | |
| __ z_stg(Z_R1, oop_tmp_offset, Z_fp); | |
| // Pass handle to mirror as 2nd argument to JNI method. | |
| __ add2reg(Z_ARG2, oop_tmp_offset, Z_fp); | |
| __ bind(method_is_not_static); | |
| } | |
| // Pass JNIEnv address as first parameter. | |
| __ add2reg(Z_ARG1, in_bytes(JavaThread::jni_environment_offset()), Z_thread); | |
| // Note: last java frame has been set above already. The pc from there | |
| // is precise enough. | |
| // Get native function entry point before we change the thread state. | |
| __ z_lg(Z_R1/*native_method_entry*/, method2_(Rmethod, native_function)); | |
| //============================================================================= | |
| // Transition from _thread_in_Java to _thread_in_native. As soon as | |
| // we make this change the safepoint code needs to be certain that | |
| // the last Java frame we established is good. The pc in that frame | |
| // just need to be near here not an actual return address. | |
| #ifdef ASSERT | |
| { | |
| NearLabel L; | |
| __ mem2reg_opt(Z_R14, Address(Z_thread, JavaThread::thread_state_offset()), false /*32 bits*/); | |
| __ compareU32_and_branch(Z_R14, _thread_in_Java, Assembler::bcondEqual, L); | |
| reentry = __ stop_chain_static(reentry, "Wrong thread state in native stub"); | |
| __ bind(L); | |
| } | |
| #endif | |
| // Memory ordering: Z does not reorder store/load with subsequent load. That's strong enough. | |
| __ set_thread_state(_thread_in_native); | |
| //============================================================================= | |
| // Call the native method. Argument registers must not have been | |
| // overwritten since "__ call_stub(signature_handler);" (except for | |
| // ARG1 and ARG2 for static methods). | |
| __ call_c(Z_R1/*native_method_entry*/); | |
| // NOTE: frame::interpreter_frame_result() depends on these stores. | |
| __ z_stg(Z_RET, _z_ijava_state_neg(lresult), Z_fp); | |
| __ freg2mem_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult))); | |
| const Register Rlresult = signature_handler_entry; | |
| assert(Rlresult->is_nonvolatile(), "Rlresult must be in a non-volatile register"); | |
| __ z_lgr(Rlresult, Z_RET); | |
| // Z_method may no longer be valid, because of GC. | |
| // Block, if necessary, before resuming in _thread_in_Java state. | |
| // In order for GC to work, don't clear the last_Java_sp until after | |
| // blocking. | |
| //============================================================================= | |
| // Switch thread to "native transition" state before reading the | |
| // synchronization state. This additional state is necessary | |
| // because reading and testing the synchronization state is not | |
| // atomic w.r.t. GC, as this scenario demonstrates: Java thread A, | |
| // in _thread_in_native state, loads _not_synchronized and is | |
| // preempted. VM thread changes sync state to synchronizing and | |
| // suspends threads for GC. Thread A is resumed to finish this | |
| // native method, but doesn't block here since it didn't see any | |
| // synchronization is progress, and escapes. | |
| __ set_thread_state(_thread_in_native_trans); | |
| if (!UseSystemMemoryBarrier) { | |
| __ z_fence(); | |
| } | |
| // Now before we return to java we must look for a current safepoint | |
| // (a new safepoint can not start since we entered native_trans). | |
| // We must check here because a current safepoint could be modifying | |
| // the callers registers right this moment. | |
| // Check for safepoint operation in progress and/or pending suspend requests. | |
| { | |
| Label Continue, do_safepoint; | |
| __ safepoint_poll(do_safepoint, Z_R1); | |
| // Check for suspend. | |
| __ load_and_test_int(Z_R0/*suspend_flags*/, thread_(suspend_flags)); | |
| __ z_bre(Continue); // 0 -> no flag set -> not suspended | |
| __ bind(do_safepoint); | |
| __ z_lgr(Z_ARG1, Z_thread); | |
| __ call_c(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)); | |
| __ bind(Continue); | |
| } | |
| //============================================================================= | |
| // Back in Interpreter Frame. | |
| // We are in thread_in_native_trans here and back in the normal | |
| // interpreter frame. We don't have to do anything special about | |
| // safepoints and we can switch to Java mode anytime we are ready. | |
| // Note: frame::interpreter_frame_result has a dependency on how the | |
| // method result is saved across the call to post_method_exit. For | |
| // native methods it assumes that the non-FPU/non-void result is | |
| // saved in z_ijava_state.lresult and a FPU result in z_ijava_state.fresult. If | |
| // this changes then the interpreter_frame_result implementation | |
| // will need to be updated too. | |
| //============================================================================= | |
| // Back in Java. | |
| // Memory ordering: Z does not reorder store/load with subsequent | |
| // load. That's strong enough. | |
| __ set_thread_state(_thread_in_Java); | |
| __ reset_last_Java_frame(); | |
| // We reset the JNI handle block only after unboxing the result; see below. | |
| // The method register is junk from after the thread_in_native transition | |
| // until here. Also can't call_VM until the bcp has been | |
| // restored. Need bcp for throwing exception below so get it now. | |
| __ get_method(Rmethod); | |
| // Restore Z_bcp to have legal interpreter frame, | |
| // i.e., bci == 0 <=> Z_bcp == code_base(). | |
| __ z_lg(Z_bcp, Address(Rmethod, Method::const_offset())); // get constMethod | |
| __ add2reg(Z_bcp, in_bytes(ConstMethod::codes_offset())); // get codebase | |
| if (CheckJNICalls) { | |
| // clear_pending_jni_exception_check | |
| __ clear_mem(Address(Z_thread, JavaThread::pending_jni_exception_check_fn_offset()), sizeof(oop)); | |
| } | |
| // Check if the native method returns an oop, and if so, move it | |
| // from the jni handle to z_ijava_state.oop_temp. This is | |
| // necessary, because we reset the jni handle block below. | |
| // NOTE: frame::interpreter_frame_result() depends on this, too. | |
| { NearLabel no_oop_result; | |
| __ load_absolute_address(Z_R1, AbstractInterpreter::result_handler(T_OBJECT)); | |
| __ compareU64_and_branch(Z_R1, Rresult_handler, Assembler::bcondNotEqual, no_oop_result); | |
| __ resolve_jobject(Rlresult, /* tmp1 */ Rmethod, /* tmp2 */ Z_R1); | |
| __ z_stg(Rlresult, oop_tmp_offset, Z_fp); | |
| __ bind(no_oop_result); | |
| } | |
| // Reset handle block. | |
| __ z_lg(Z_R1/*active_handles*/, thread_(active_handles)); | |
| __ clear_mem(Address(Z_R1, JNIHandleBlock::top_offset()), 4); | |
| // Handle exceptions (exception handling will handle unlocking!). | |
| { | |
| Label L; | |
| __ load_and_test_long(Z_R0/*pending_exception*/, thread_(pending_exception)); | |
| __ z_bre(L); | |
| __ MacroAssembler::call_VM(noreg, | |
| CAST_FROM_FN_PTR(address, | |
| InterpreterRuntime::throw_pending_exception)); | |
| __ should_not_reach_here(); | |
| __ bind(L); | |
| } | |
| if (synchronized) { | |
| Register Rfirst_monitor = Z_ARG2; | |
| __ add2reg(Rfirst_monitor, -(frame::z_ijava_state_size + (int)sizeof(BasicObjectLock)), Z_fp); | |
| #ifdef ASSERT | |
| NearLabel ok; | |
| __ get_monitors(Z_R1); | |
| __ compareU64_and_branch(Rfirst_monitor, Z_R1, Assembler::bcondEqual, ok); | |
| reentry = __ stop_chain_static(reentry, "native_entry:unlock: inconsistent z_ijava_state.monitors"); | |
| __ bind(ok); | |
| #endif | |
| __ unlock_object(Rfirst_monitor); | |
| } | |
| // JVMTI support. Result has already been saved above to the frame. | |
| __ notify_method_exit(true/*native_method*/, ilgl, InterpreterMacroAssembler::NotifyJVMTI); | |
| // Move native method result back into proper registers and return. | |
| __ mem2freg_opt(Z_FRET, Address(Z_fp, _z_ijava_state_neg(fresult))); | |
| __ mem2reg_opt(Z_RET, Address(Z_fp, _z_ijava_state_neg(lresult))); | |
| __ call_stub(Rresult_handler); | |
| // Pop the native method's interpreter frame. | |
| __ pop_interpreter_frame(Z_R14 /*return_pc*/, Z_ARG2/*tmp1*/, Z_ARG3/*tmp2*/); | |
| // Return to caller. | |
| __ z_br(Z_R14); | |
| if (inc_counter) { | |
| // Handle overflow of counter and compile method. | |
| __ bind(invocation_counter_overflow); | |
| generate_counter_overflow(continue_after_compile); | |
| } | |
| BLOCK_COMMENT("} native_entry"); | |
| return entry_point; | |
| } | |
| // | |
| // Generic interpreted method entry to template interpreter. | |
| // | |
| address TemplateInterpreterGenerator::generate_normal_entry(bool synchronized) { | |
| address entry_point = __ pc(); | |
| bool inc_counter = UseCompiler || CountCompiledCalls; | |
| // Interpreter entry for ordinary Java methods. | |
| // | |
| // Registers alive | |
| // Z_SP - stack pointer | |
| // Z_thread - JavaThread* | |
| // Z_method - callee's method (method to be invoked) | |
| // Z_esp - operand (or expression) stack pointer of caller. one slot above last arg. | |
| // Z_R10 - sender sp (before modifications, e.g. by c2i adapter | |
| // and as well by generate_fixed_frame below) | |
| // Z_R14 - return address to caller (call_stub or c2i_adapter) | |
| // | |
| // Registers updated | |
| // Z_SP - stack pointer | |
| // Z_fp - callee's framepointer | |
| // Z_esp - callee's operand stack pointer | |
| // points to the slot above the value on top | |
| // Z_locals - used to access locals: locals[i] := *(Z_locals - i*BytesPerWord) | |
| // Z_tos - integer result, if any | |
| // z_ftos - floating point result, if any | |
| // | |
| // | |
| // stack layout at this point: | |
| // | |
| // F1 [TOP_IJAVA_FRAME_ABI] <-- Z_SP, Z_R10 (Z_R10 will be below Z_SP if | |
| // frame was extended by c2i adapter) | |
| // [outgoing Java arguments] <-- Z_esp | |
| // ... | |
| // PARENT [PARENT_IJAVA_FRAME_ABI] | |
| // ... | |
| // | |
| // stack layout before dispatching the first bytecode: | |
| // | |
| // F0 [TOP_IJAVA_FRAME_ABI] <-- Z_SP | |
| // [operand stack] <-- Z_esp | |
| // monitor (optional, can grow) | |
| // [IJAVA_STATE] | |
| // F1 [PARENT_IJAVA_FRAME_ABI] <-- Z_fp (== *Z_SP) | |
| // [F0's locals] <-- Z_locals | |
| // [F1's operand stack] | |
| // [F1's monitors] (optional) | |
| // [IJAVA_STATE] | |
| // Make sure registers are different! | |
| assert_different_registers(Z_thread, Z_method, Z_esp); | |
| BLOCK_COMMENT("normal_entry {"); | |
| // Make sure method is not native and not abstract. | |
| // Rethink these assertions - they can be simplified and shared. | |
| #ifdef ASSERT | |
| address reentry = nullptr; | |
| { Label L; | |
| __ testbit_ushort(method_(access_flags), JVM_ACC_NATIVE_BIT); | |
| __ z_bfalse(L); | |
| reentry = __ stop_chain_static(reentry, "tried to execute native method as non-native"); | |
| __ bind(L); | |
| } | |
| { Label L; | |
| __ testbit_ushort(method_(access_flags), JVM_ACC_ABSTRACT_BIT); | |
| __ z_bfalse(L); | |
| reentry = __ stop_chain_static(reentry, "tried to execute abstract method as non-abstract"); | |
| __ bind(L); | |
| } | |
| #endif // ASSERT | |
| // Save the return PC into the callers frame for assertion in generate_fixed_frame. | |
| NOT_PRODUCT(__ save_return_pc(Z_R14)); | |
| // Generate the code to allocate the interpreter stack frame. | |
| generate_fixed_frame(false); | |
| const Address do_not_unlock_if_synchronized(Z_thread, JavaThread::do_not_unlock_if_synchronized_offset()); | |
| // Since at this point in the method invocation the exception handler | |
| // would try to exit the monitor of synchronized methods which hasn't | |
| // been entered yet, we set the thread local variable | |
| // _do_not_unlock_if_synchronized to true. If any exception was thrown by | |
| // runtime, exception handling i.e. unlock_if_synchronized_method will | |
| // check this thread local flag. | |
| __ z_mvi(do_not_unlock_if_synchronized, true); | |
| __ profile_parameters_type(Z_tmp_2, Z_ARG3, Z_ARG4); | |
| // Increment invocation counter and check for overflow. | |
| // | |
| // Note: checking for negative value instead of overflow so we have a 'sticky' | |
| // overflow test (may be of importance as soon as we have true MT/MP). | |
| NearLabel invocation_counter_overflow; | |
| NearLabel Lcontinue; | |
| if (inc_counter) { | |
| generate_counter_incr(&invocation_counter_overflow); | |
| } | |
| __ bind(Lcontinue); | |
| bang_stack_shadow_pages(false); | |
| // Reset the _do_not_unlock_if_synchronized flag. | |
| __ z_mvi(do_not_unlock_if_synchronized, false); | |
| // Check for synchronized methods. | |
| // Must happen AFTER invocation_counter check and stack overflow check, | |
| // so method is not locked if overflows. | |
| if (synchronized) { | |
| // Allocate monitor and lock method. | |
| lock_method(); | |
| } else { | |
| #ifdef ASSERT | |
| { Label L; | |
| __ get_method(Z_R1_scratch); | |
| __ testbit_ushort(method2_(Z_R1_scratch, access_flags), JVM_ACC_SYNCHRONIZED_BIT); | |
| __ z_bfalse(L); | |
| reentry = __ stop_chain_static(reentry, "method needs synchronization"); | |
| __ bind(L); | |
| } | |
| #endif // ASSERT | |
| } | |
| // start execution | |
| #ifdef ASSERT | |
| __ verify_esp(Z_esp, Z_R1_scratch); | |
| #endif | |
| // jvmti support | |
| __ notify_method_entry(); | |
| // Start executing instructions. | |
| __ dispatch_next(vtos); | |
| // Dispatch_next does not return. | |
| DEBUG_ONLY(__ should_not_reach_here()); | |
| // Invocation counter overflow. | |
| if (inc_counter) { | |
| // Handle invocation counter overflow. | |
| __ bind(invocation_counter_overflow); | |
| generate_counter_overflow(Lcontinue); | |
| } | |
| BLOCK_COMMENT("} normal_entry"); | |
| return entry_point; | |
| } | |
| /** | |
| * Method entry for static native methods: | |
| * int java.util.zip.CRC32.update(int crc, int b) | |
| */ | |
| address TemplateInterpreterGenerator::generate_CRC32_update_entry() { | |
| assert(UseCRC32Intrinsics, "this intrinsic is not supported"); | |
| uint64_t entry_off = __ offset(); | |
| Label slow_path; | |
| // If we need a safepoint check, generate full interpreter entry. | |
| __ safepoint_poll(slow_path, Z_R1); | |
| BLOCK_COMMENT("CRC32_update {"); | |
| // We don't generate local frame and don't align stack because | |
| // we not even call stub code (we generate the code inline) | |
| // and there is no safepoint on this path. | |
| // Load java parameters. | |
| // Z_esp is callers operand stack pointer, i.e. it points to the parameters. | |
| const Register argP = Z_esp; | |
| const Register crc = Z_ARG1; // crc value | |
| const Register data = Z_ARG2; // address of java byte value (kernel_crc32 needs address) | |
| const Register dataLen = Z_ARG3; // source data len (1 byte). Not used because calling the single-byte emitter. | |
| const Register table = Z_ARG4; // address of crc32 table | |
| // Arguments are reversed on java expression stack. | |
| __ z_la(data, 3+1*wordSize, argP); // byte value (stack address). | |
| // Being passed as an int, the single byte is at offset +3. | |
| __ z_llgf(crc, 2 * wordSize, argP); // Current crc state, zero extend to 64 bit to have a clean register. | |
| StubRoutines::zarch::generate_load_crc_table_addr(_masm, table); | |
| __ kernel_crc32_singleByte(crc, data, dataLen, table, Z_R1, true); | |
| // Restore caller sp for c2i case. | |
| __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. | |
| __ z_br(Z_R14); | |
| BLOCK_COMMENT("} CRC32_update"); | |
| // Use a previously generated vanilla native entry as the slow path. | |
| BIND(slow_path); | |
| __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1); | |
| return __ addr_at(entry_off); | |
| } | |
| /** | |
| * Method entry for static native methods: | |
| * int java.util.zip.CRC32.updateBytes( int crc, byte[] b, int off, int len) | |
| * int java.util.zip.CRC32.updateByteBuffer(int crc, long* buf, int off, int len) | |
| */ | |
| address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) { | |
| assert(UseCRC32Intrinsics, "this intrinsic is not supported"); | |
| uint64_t entry_off = __ offset(); | |
| Label slow_path; | |
| // If we need a safepoint check, generate full interpreter entry. | |
| __ safepoint_poll(slow_path, Z_R1); | |
| // We don't generate local frame and don't align stack because | |
| // we call stub code and there is no safepoint on this path. | |
| // Load parameters. | |
| // Z_esp is callers operand stack pointer, i.e. it points to the parameters. | |
| const Register argP = Z_esp; | |
| const Register crc = Z_ARG1; // crc value | |
| const Register data = Z_ARG2; // address of java byte array | |
| const Register dataLen = Z_ARG3; // source data len | |
| const Register table = Z_ARG4; // address of crc32 table | |
| const Register t0 = Z_R10; // work reg for kernel* emitters | |
| const Register t1 = Z_R11; // work reg for kernel* emitters | |
| const Register t2 = Z_R12; // work reg for kernel* emitters | |
| const Register t3 = Z_R13; // work reg for kernel* emitters | |
| // Arguments are reversed on java expression stack. | |
| // Calculate address of start element. | |
| if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) { // Used for "updateByteBuffer direct". | |
| // crc @ (SP + 5W) (32bit) | |
| // buf @ (SP + 3W) (64bit ptr to long array) | |
| // off @ (SP + 2W) (32bit) | |
| // dataLen @ (SP + 1W) (32bit) | |
| // data = buf + off | |
| BLOCK_COMMENT("CRC32_updateByteBuffer {"); | |
| __ z_llgf(crc, 5*wordSize, argP); // current crc state | |
| __ z_lg(data, 3*wordSize, argP); // start of byte buffer | |
| __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. | |
| __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process | |
| } else { // Used for "updateBytes update". | |
| // crc @ (SP + 4W) (32bit) | |
| // buf @ (SP + 3W) (64bit ptr to byte array) | |
| // off @ (SP + 2W) (32bit) | |
| // dataLen @ (SP + 1W) (32bit) | |
| // data = buf + off + base_offset | |
| BLOCK_COMMENT("CRC32_updateBytes {"); | |
| __ z_llgf(crc, 4*wordSize, argP); // current crc state | |
| __ z_lg(data, 3*wordSize, argP); // start of byte buffer | |
| __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. | |
| __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process | |
| __ z_aghi(data, arrayOopDesc::base_offset_in_bytes(T_BYTE)); | |
| } | |
| StubRoutines::zarch::generate_load_crc_table_addr(_masm, table); | |
| __ resize_frame(-(6*8), Z_R0, true); // Resize frame to provide add'l space to spill 5 registers. | |
| __ z_stmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 to make them available as work registers. | |
| __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, true); | |
| __ z_lmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 back from stack. | |
| // Restore caller sp for c2i case. | |
| __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. | |
| __ z_br(Z_R14); | |
| BLOCK_COMMENT("} CRC32_update{Bytes|ByteBuffer}"); | |
| // Use a previously generated vanilla native entry as the slow path. | |
| BIND(slow_path); | |
| __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native), Z_R1); | |
| return __ addr_at(entry_off); | |
| } | |
| /** | |
| * Method entry for intrinsic-candidate (non-native) methods: | |
| * int java.util.zip.CRC32C.updateBytes( int crc, byte[] b, int off, int end) | |
| * int java.util.zip.CRC32C.updateDirectByteBuffer(int crc, long* buf, int off, int end) | |
| * Unlike CRC32, CRC32C does not have any methods marked as native | |
| * CRC32C also uses an "end" variable instead of the length variable CRC32 uses | |
| */ | |
| address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) { | |
| assert(UseCRC32CIntrinsics, "this intrinsic is not supported"); | |
| uint64_t entry_off = __ offset(); | |
| // We don't generate local frame and don't align stack because | |
| // we call stub code and there is no safepoint on this path. | |
| // Load parameters. | |
| // Z_esp is callers operand stack pointer, i.e. it points to the parameters. | |
| const Register argP = Z_esp; | |
| const Register crc = Z_ARG1; // crc value | |
| const Register data = Z_ARG2; // address of java byte array | |
| const Register dataLen = Z_ARG3; // source data len | |
| const Register table = Z_ARG4; // address of crc32 table | |
| const Register t0 = Z_R10; // work reg for kernel* emitters | |
| const Register t1 = Z_R11; // work reg for kernel* emitters | |
| const Register t2 = Z_R12; // work reg for kernel* emitters | |
| const Register t3 = Z_R13; // work reg for kernel* emitters | |
| // Arguments are reversed on java expression stack. | |
| // Calculate address of start element. | |
| if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) { // Used for "updateByteBuffer direct". | |
| // crc @ (SP + 5W) (32bit) | |
| // buf @ (SP + 3W) (64bit ptr to long array) | |
| // off @ (SP + 2W) (32bit) | |
| // dataLen @ (SP + 1W) (32bit) | |
| // data = buf + off | |
| BLOCK_COMMENT("CRC32C_updateDirectByteBuffer {"); | |
| __ z_llgf(crc, 5*wordSize, argP); // current crc state | |
| __ z_lg(data, 3*wordSize, argP); // start of byte buffer | |
| __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. | |
| __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process, calculated as | |
| __ z_sgf(dataLen, Address(argP, 2*wordSize)); // (end_index - offset) | |
| } else { // Used for "updateBytes update". | |
| // crc @ (SP + 4W) (32bit) | |
| // buf @ (SP + 3W) (64bit ptr to byte array) | |
| // off @ (SP + 2W) (32bit) | |
| // dataLen @ (SP + 1W) (32bit) | |
| // data = buf + off + base_offset | |
| BLOCK_COMMENT("CRC32C_updateBytes {"); | |
| __ z_llgf(crc, 4*wordSize, argP); // current crc state | |
| __ z_lg(data, 3*wordSize, argP); // start of byte buffer | |
| __ z_agf(data, 2*wordSize, argP); // Add byte buffer offset. | |
| __ z_lgf(dataLen, 1*wordSize, argP); // #bytes to process, calculated as | |
| __ z_sgf(dataLen, Address(argP, 2*wordSize)); // (end_index - offset) | |
| __ z_aghi(data, arrayOopDesc::base_offset_in_bytes(T_BYTE)); | |
| } | |
| StubRoutines::zarch::generate_load_crc32c_table_addr(_masm, table); | |
| __ resize_frame(-(6*8), Z_R0, true); // Resize frame to provide add'l space to spill 5 registers. | |
| __ z_stmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 to make them available as work registers. | |
| __ kernel_crc32_1word(crc, data, dataLen, table, t0, t1, t2, t3, false); | |
| __ z_lmg(t0, t3, 1*8, Z_SP); // Spill regs 10..13 back from stack. | |
| // Restore caller sp for c2i case. | |
| __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. | |
| __ z_br(Z_R14); | |
| BLOCK_COMMENT("} CRC32C_update{Bytes|DirectByteBuffer}"); | |
| return __ addr_at(entry_off); | |
| } | |
| address TemplateInterpreterGenerator::generate_currentThread() { | |
| uint64_t entry_off = __ offset(); | |
| __ z_lg(Z_RET, Address(Z_thread, JavaThread::threadObj_offset())); | |
| __ resolve_oop_handle(Z_RET); | |
| // Restore caller sp for c2i case. | |
| __ resize_frame_absolute(Z_R10, Z_R0, true); // Cut the stack back to where the caller started. | |
| __ z_br(Z_R14); | |
| return __ addr_at(entry_off); | |
| } | |
| // Not supported | |
| address TemplateInterpreterGenerator::generate_Float_float16ToFloat_entry() { return nullptr; } | |
| address TemplateInterpreterGenerator::generate_Float_floatToFloat16_entry() { return nullptr; } | |
| void TemplateInterpreterGenerator::bang_stack_shadow_pages(bool native_call) { | |
| // Quick & dirty stack overflow checking: bang the stack & handle trap. | |
| // Note that we do the banging after the frame is setup, since the exception | |
| // handling code expects to find a valid interpreter frame on the stack. | |
| // Doing the banging earlier fails if the caller frame is not an interpreter | |
| // frame. | |
| // (Also, the exception throwing code expects to unlock any synchronized | |
| // method receiver, so do the banging after locking the receiver.) | |
| // Bang each page in the shadow zone. We can't assume it's been done for | |
| // an interpreter frame with greater than a page of locals, so each page | |
| // needs to be checked. Only true for non-native. For native, we only bang the last page. | |
| const size_t page_size = os::vm_page_size(); | |
| const int n_shadow_pages = (int)(StackOverflow::stack_shadow_zone_size()/page_size); | |
| const int start_page_num = native_call ? n_shadow_pages : 1; | |
| for (int pages = start_page_num; pages <= n_shadow_pages; pages++) { | |
| __ bang_stack_with_offset(pages*page_size); | |
| } | |
| } | |
| //----------------------------------------------------------------------------- | |
| // Exceptions | |
| void TemplateInterpreterGenerator::generate_throw_exception() { | |
| BLOCK_COMMENT("throw_exception {"); | |
| // Entry point in previous activation (i.e., if the caller was interpreted). | |
| Interpreter::_rethrow_exception_entry = __ pc(); | |
| __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Frame accessors use Z_fp. | |
| // Z_ARG1 (==Z_tos): exception | |
| // Z_ARG2 : Return address/pc that threw exception. | |
| __ restore_bcp(); // R13 points to call/send. | |
| __ restore_locals(); | |
| // Fallthrough, no need to restore Z_esp. | |
| // Entry point for exceptions thrown within interpreter code. | |
| Interpreter::_throw_exception_entry = __ pc(); | |
| // Expression stack is undefined here. | |
| // Z_ARG1 (==Z_tos): exception | |
| // Z_bcp: exception bcp | |
| __ verify_oop(Z_ARG1); | |
| __ z_lgr(Z_ARG2, Z_ARG1); | |
| // Expression stack must be empty before entering the VM in case of | |
| // an exception. | |
| __ empty_expression_stack(); | |
| // Find exception handler address and preserve exception oop. | |
| const Register Rpreserved_exc_oop = Z_tmp_1; | |
| __ call_VM(Rpreserved_exc_oop, | |
| CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), | |
| Z_ARG2); | |
| // Z_RET: exception handler entry point | |
| // Z_bcp: bcp for exception handler | |
| __ push_ptr(Rpreserved_exc_oop); // Push exception which is now the only value on the stack. | |
| __ z_br(Z_RET); // Jump to exception handler (may be _remove_activation_entry!). | |
| // If the exception is not handled in the current frame the frame is | |
| // removed and the exception is rethrown (i.e. exception | |
| // continuation is _rethrow_exception). | |
| // | |
| // Note: At this point the bci is still the bci for the instruction | |
| // which caused the exception and the expression stack is | |
| // empty. Thus, for any VM calls at this point, GC will find a legal | |
| // oop map (with empty expression stack). | |
| // | |
| // JVMTI PopFrame support | |
| // | |
| Interpreter::_remove_activation_preserving_args_entry = __ pc(); | |
| __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP); | |
| __ empty_expression_stack(); | |
| // Set the popframe_processing bit in pending_popframe_condition | |
| // indicating that we are currently handling popframe, so that | |
| // call_VMs that may happen later do not trigger new popframe | |
| // handling cycles. | |
| __ load_sized_value(Z_tmp_1, Address(Z_thread, JavaThread::popframe_condition_offset()), 4, false /*signed*/); | |
| __ z_oill(Z_tmp_1, JavaThread::popframe_processing_bit); | |
| __ z_sty(Z_tmp_1, thread_(popframe_condition)); | |
| { | |
| // Check to see whether we are returning to a deoptimized frame. | |
| // (The PopFrame call ensures that the caller of the popped frame is | |
| // either interpreted or compiled and deoptimizes it if compiled.) | |
| // In this case, we can't call dispatch_next() after the frame is | |
| // popped, but instead must save the incoming arguments and restore | |
| // them after deoptimization has occurred. | |
| // | |
| // Note that we don't compare the return PC against the | |
| // deoptimization blob's unpack entry because of the presence of | |
| // adapter frames in C2. | |
| NearLabel caller_not_deoptimized; | |
| __ z_lg(Z_ARG1, _z_parent_ijava_frame_abi(return_pc), Z_fp); | |
| __ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), Z_ARG1); | |
| __ compareU64_and_branch(Z_RET, (intptr_t)0, Assembler::bcondNotEqual, caller_not_deoptimized); | |
| // Compute size of arguments for saving when returning to | |
| // deoptimized caller. | |
| __ get_method(Z_ARG2); | |
| __ z_lg(Z_ARG2, Address(Z_ARG2, Method::const_offset())); | |
| __ z_llgh(Z_ARG2, Address(Z_ARG2, ConstMethod::size_of_parameters_offset())); | |
| __ z_sllg(Z_ARG2, Z_ARG2, Interpreter::logStackElementSize); // slots 2 bytes | |
| __ restore_locals(); | |
| // Compute address of args to be saved. | |
| __ z_lgr(Z_ARG3, Z_locals); | |
| __ z_slgr(Z_ARG3, Z_ARG2); | |
| __ add2reg(Z_ARG3, wordSize); | |
| // Save these arguments. | |
| __ call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), | |
| Z_thread, Z_ARG2, Z_ARG3); | |
| __ remove_activation(vtos, Z_R14, | |
| /* throw_monitor_exception */ false, | |
| /* install_monitor_exception */ false, | |
| /* notify_jvmdi */ false); | |
| // Inform deoptimization that it is responsible for restoring | |
| // these arguments. | |
| __ store_const(thread_(popframe_condition), | |
| JavaThread::popframe_force_deopt_reexecution_bit, | |
| Z_tmp_1, false); | |
| // Continue in deoptimization handler. | |
| __ z_br(Z_R14); | |
| __ bind(caller_not_deoptimized); | |
| } | |
| // Clear the popframe condition flag. | |
| __ clear_mem(thread_(popframe_condition), sizeof(int)); | |
| __ remove_activation(vtos, | |
| noreg, // Retaddr is not used. | |
| false, // throw_monitor_exception | |
| false, // install_monitor_exception | |
| false); // notify_jvmdi | |
| __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. | |
| __ restore_bcp(); | |
| __ restore_locals(); | |
| __ restore_esp(); | |
| // The method data pointer was incremented already during | |
| // call profiling. We have to restore the mdp for the current bcp. | |
| if (ProfileInterpreter) { | |
| __ set_method_data_pointer_for_bcp(); | |
| } | |
| #if INCLUDE_JVMTI | |
| { | |
| Label L_done; | |
| __ z_cli(0, Z_bcp, Bytecodes::_invokestatic); | |
| __ z_brc(Assembler::bcondNotEqual, L_done); | |
| // The member name argument must be restored if _invokestatic is | |
| // re-executed after a PopFrame call. Detect such a case in the | |
| // InterpreterRuntime function and return the member name | |
| // argument, or null. | |
| __ z_lg(Z_ARG2, Address(Z_locals)); | |
| __ get_method(Z_ARG3); | |
| __ call_VM(Z_tmp_1, | |
| CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), | |
| Z_ARG2, Z_ARG3, Z_bcp); | |
| __ z_ltgr(Z_tmp_1, Z_tmp_1); | |
| __ z_brc(Assembler::bcondEqual, L_done); | |
| __ z_stg(Z_tmp_1, Address(Z_esp, wordSize)); | |
| __ bind(L_done); | |
| } | |
| #endif // INCLUDE_JVMTI | |
| __ dispatch_next(vtos); | |
| // End of PopFrame support. | |
| Interpreter::_remove_activation_entry = __ pc(); | |
| // In between activations - previous activation type unknown yet | |
| // compute continuation point - the continuation point expects the | |
| // following registers set up: | |
| // | |
| // Z_ARG1 (==Z_tos): exception | |
| // Z_ARG2 : return address/pc that threw exception | |
| Register return_pc = Z_tmp_1; | |
| Register handler = Z_tmp_2; | |
| assert(return_pc->is_nonvolatile(), "use non-volatile reg. to preserve exception pc"); | |
| assert(handler->is_nonvolatile(), "use non-volatile reg. to handler pc"); | |
| __ asm_assert_ijava_state_magic(return_pc/*tmp*/); // The top frame should be an interpreter frame. | |
| __ z_lg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_fp); | |
| // Moved removing the activation after VM call, because the new top | |
| // frame does not necessarily have the z_abi_160 required for a VM | |
| // call (e.g. if it is compiled). | |
| __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, | |
| SharedRuntime::exception_handler_for_return_address), | |
| Z_thread, return_pc); | |
| __ z_lgr(handler, Z_RET); // Save exception handler. | |
| // Preserve exception over this code sequence. | |
| __ pop_ptr(Z_ARG1); | |
| __ set_vm_result(Z_ARG1); | |
| // Remove the activation (without doing throws on illegalMonitorExceptions). | |
| __ remove_activation(vtos, noreg/*ret.pc already loaded*/, false/*throw exc*/, true/*install exc*/, false/*notify jvmti*/); | |
| __ z_lg(Z_fp, _z_abi(callers_sp), Z_SP); // Restore frame pointer. | |
| __ get_vm_result_oop(Z_ARG1); // Restore exception. | |
| __ verify_oop(Z_ARG1); | |
| __ z_lgr(Z_ARG2, return_pc); // Restore return address. | |
| #ifdef ASSERT | |
| // The return_pc in the new top frame is dead... at least that's my | |
| // current understanding. To assert this I overwrite it. | |
| // Note: for compiled frames the handler is the deopt blob | |
| // which writes Z_ARG2 into the return_pc slot. | |
| __ load_const_optimized(return_pc, 0xb00b1); | |
| __ z_stg(return_pc, _z_parent_ijava_frame_abi(return_pc), Z_SP); | |
| #endif | |
| // Z_ARG1 (==Z_tos): exception | |
| // Z_ARG2 : return address/pc that threw exception | |
| // Note that an "issuing PC" is actually the next PC after the call. | |
| __ z_br(handler); // Jump to exception handler of caller. | |
| BLOCK_COMMENT("} throw_exception"); | |
| } | |
| // | |
| // JVMTI ForceEarlyReturn support | |
| // | |
| address TemplateInterpreterGenerator::generate_earlyret_entry_for (TosState state) { | |
| address entry = __ pc(); | |
| BLOCK_COMMENT("earlyret_entry {"); | |
| __ z_lg(Z_fp, _z_parent_ijava_frame_abi(callers_sp), Z_SP); | |
| __ restore_bcp(); | |
| __ restore_locals(); | |
| __ restore_esp(); | |
| __ empty_expression_stack(); | |
| __ load_earlyret_value(state); | |
| Register RjvmtiState = Z_tmp_1; | |
| __ z_lg(RjvmtiState, thread_(jvmti_thread_state)); | |
| __ store_const(Address(RjvmtiState, JvmtiThreadState::earlyret_state_offset()), | |
| JvmtiThreadState::earlyret_inactive, 4, 4, Z_R0_scratch); | |
| if (state == itos) { | |
| // Narrow result if state is itos but result type is smaller. | |
| // Need to narrow in the return bytecode rather than in generate_return_entry | |
| // since compiled code callers expect the result to already be narrowed. | |
| __ narrow(Z_tos, Z_tmp_1); /* fall through */ | |
| } | |
| __ remove_activation(state, | |
| Z_tmp_1, // retaddr | |
| false, // throw_monitor_exception | |
| false, // install_monitor_exception | |
| true); // notify_jvmdi | |
| __ z_br(Z_tmp_1); | |
| BLOCK_COMMENT("} earlyret_entry"); | |
| return entry; | |
| } | |
| //----------------------------------------------------------------------------- | |
| // Helper for vtos entry point generation. | |
| void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, | |
| address& bep, | |
| address& cep, | |
| address& sep, | |
| address& aep, | |
| address& iep, | |
| address& lep, | |
| address& fep, | |
| address& dep, | |
| address& vep) { | |
| assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); | |
| Label L; | |
| aep = __ pc(); __ push_ptr(); __ z_bru(L); | |
| fep = __ pc(); __ push_f(); __ z_bru(L); | |
| dep = __ pc(); __ push_d(); __ z_bru(L); | |
| lep = __ pc(); __ push_l(); __ z_bru(L); | |
| bep = cep = sep = | |
| iep = __ pc(); __ push_i(); | |
| vep = __ pc(); | |
| __ bind(L); | |
| generate_and_dispatch(t); | |
| } | |
| //----------------------------------------------------------------------------- | |
| #ifndef PRODUCT | |
| address TemplateInterpreterGenerator::generate_trace_code(TosState state) { | |
| address entry = __ pc(); | |
| NearLabel counter_below_trace_threshold; | |
| if (TraceBytecodesAt > 0) { | |
| // Skip runtime call, if the trace threshold is not yet reached. | |
| __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value); | |
| __ load_absolute_address(Z_tmp_2, (address)&TraceBytecodesAt); | |
| __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 8, false /*signed*/); | |
| __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/); | |
| __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, counter_below_trace_threshold); | |
| } | |
| int offset2 = state == ltos || state == dtos ? 2 : 1; | |
| __ push(state); | |
| // Preserved return pointer is in Z_R14. | |
| // InterpreterRuntime::trace_bytecode() preserved and returns the value passed as second argument. | |
| __ z_lgr(Z_ARG2, Z_R14); | |
| __ z_lg(Z_ARG3, Address(Z_esp, Interpreter::expr_offset_in_bytes(0))); | |
| if (WizardMode) { | |
| __ z_lgr(Z_ARG4, Z_esp); // Trace Z_esp in WizardMode. | |
| } else { | |
| __ z_lg(Z_ARG4, Address(Z_esp, Interpreter::expr_offset_in_bytes(offset2))); | |
| } | |
| __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::trace_bytecode), Z_ARG2, Z_ARG3, Z_ARG4); | |
| __ z_lgr(Z_R14, Z_RET); // Estore return address (see above). | |
| __ pop(state); | |
| __ bind(counter_below_trace_threshold); | |
| __ z_br(Z_R14); // return | |
| return entry; | |
| } | |
| // Make feasible for old CPUs. | |
| void TemplateInterpreterGenerator::count_bytecode() { | |
| __ load_absolute_address(Z_R1_scratch, (address) &BytecodeCounter::_counter_value); | |
| __ add2mem_64(Address(Z_R1_scratch), 1, Z_R0_scratch); | |
| } | |
| void TemplateInterpreterGenerator::histogram_bytecode(Template * t) { | |
| __ load_absolute_address(Z_R1_scratch, (address)&BytecodeHistogram::_counters[ t->bytecode() ]); | |
| __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1); | |
| } | |
| void TemplateInterpreterGenerator::histogram_bytecode_pair(Template * t) { | |
| Address index_addr(Z_tmp_1, (intptr_t) 0); | |
| Register index = Z_tmp_2; | |
| // Load previous index. | |
| __ load_absolute_address(Z_tmp_1, (address) &BytecodePairHistogram::_index); | |
| __ mem2reg_opt(index, index_addr, false); | |
| // Mask with current bytecode and store as new previous index. | |
| __ z_srl(index, BytecodePairHistogram::log2_number_of_codes); | |
| __ load_const_optimized(Z_R0_scratch, | |
| (int)t->bytecode() << BytecodePairHistogram::log2_number_of_codes); | |
| __ z_or(index, Z_R0_scratch); | |
| __ reg2mem_opt(index, index_addr, false); | |
| // Load counter array's address. | |
| __ z_lgfr(index, index); // Sign extend for addressing. | |
| __ z_sllg(index, index, LogBytesPerInt); // index2bytes | |
| __ load_absolute_address(Z_R1_scratch, | |
| (address) &BytecodePairHistogram::_counters); | |
| // Add index and increment counter. | |
| __ z_agr(Z_R1_scratch, index); | |
| __ add2mem_32(Address(Z_R1_scratch), 1, Z_tmp_1); | |
| } | |
| void TemplateInterpreterGenerator::trace_bytecode(Template* t) { | |
| // Call a little run-time stub to avoid blow-up for each bytecode. | |
| // The run-time runtime saves the right registers, depending on | |
| // the tosca in-state for the given template. | |
| address entry = Interpreter::trace_code(t->tos_in()); | |
| guarantee(entry != nullptr, "entry must have been generated"); | |
| __ call_stub(entry); | |
| } | |
| void TemplateInterpreterGenerator::stop_interpreter_at() { | |
| NearLabel L; | |
| __ load_absolute_address(Z_tmp_1, (address)&BytecodeCounter::_counter_value); | |
| __ load_absolute_address(Z_tmp_2, (address)&StopInterpreterAt); | |
| __ load_sized_value(Z_tmp_1, Address(Z_tmp_1), 8, false /*signed*/); | |
| __ load_sized_value(Z_tmp_2, Address(Z_tmp_2), 8, false /*signed*/); | |
| __ compareU64_and_branch(Z_tmp_1, Z_tmp_2, Assembler::bcondLow, L); | |
| assert(Z_tmp_1->is_nonvolatile(), "must be nonvolatile to preserve Z_tos"); | |
| assert(Z_F8->is_nonvolatile(), "must be nonvolatile to preserve Z_ftos"); | |
| __ z_lgr(Z_tmp_1, Z_tos); // Save tos. | |
| __ z_lgr(Z_tmp_2, Z_bytecode); // Save Z_bytecode. | |
| __ z_ldr(Z_F8, Z_ftos); // Save ftos. | |
| // Use -XX:StopInterpreterAt=<num> to set the limit | |
| // and break at breakpoint(). | |
| __ call_VM(noreg, CAST_FROM_FN_PTR(address, breakpoint), false); | |
| __ z_lgr(Z_tos, Z_tmp_1); // Restore tos. | |
| __ z_lgr(Z_bytecode, Z_tmp_2); // Save Z_bytecode. | |
| __ z_ldr(Z_ftos, Z_F8); // Restore ftos. | |
| __ bind(L); | |
| } | |
| #endif // !PRODUCT |