| /* |
| * Copyright (c) 2003, 2017, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2012, 2017 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 "precompiled.hpp" |
| #include "asm/macroAssembler.inline.hpp" |
| #include "interp_masm_ppc.hpp" |
| #include "interpreter/interpreterRuntime.hpp" |
| #include "prims/jvmtiThreadState.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| |
| #ifdef PRODUCT |
| #define BLOCK_COMMENT(str) // nothing |
| #else |
| #define BLOCK_COMMENT(str) block_comment(str) |
| #endif |
| |
| void InterpreterMacroAssembler::null_check_throw(Register a, int offset, Register temp_reg) { |
| address exception_entry = Interpreter::throw_NullPointerException_entry(); |
| MacroAssembler::null_check_throw(a, offset, temp_reg, exception_entry); |
| } |
| |
| void InterpreterMacroAssembler::jump_to_entry(address entry, Register Rscratch) { |
| assert(entry, "Entry must have been generated by now"); |
| if (is_within_range_of_b(entry, pc())) { |
| b(entry); |
| } else { |
| load_const_optimized(Rscratch, entry, R0); |
| mtctr(Rscratch); |
| bctr(); |
| } |
| } |
| |
| void InterpreterMacroAssembler::dispatch_next(TosState state, int bcp_incr) { |
| Register bytecode = R12_scratch2; |
| if (bcp_incr != 0) { |
| lbzu(bytecode, bcp_incr, R14_bcp); |
| } else { |
| lbz(bytecode, 0, R14_bcp); |
| } |
| |
| dispatch_Lbyte_code(state, bytecode, Interpreter::dispatch_table(state)); |
| } |
| |
| void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) { |
| // Load current bytecode. |
| Register bytecode = R12_scratch2; |
| lbz(bytecode, 0, R14_bcp); |
| dispatch_Lbyte_code(state, bytecode, table); |
| } |
| |
| // Dispatch code executed in the prolog of a bytecode which does not do it's |
| // own dispatch. The dispatch address is computed and placed in R24_dispatch_addr. |
| void InterpreterMacroAssembler::dispatch_prolog(TosState state, int bcp_incr) { |
| Register bytecode = R12_scratch2; |
| lbz(bytecode, bcp_incr, R14_bcp); |
| |
| load_dispatch_table(R24_dispatch_addr, Interpreter::dispatch_table(state)); |
| |
| sldi(bytecode, bytecode, LogBytesPerWord); |
| ldx(R24_dispatch_addr, R24_dispatch_addr, bytecode); |
| } |
| |
| // Dispatch code executed in the epilog of a bytecode which does not do it's |
| // own dispatch. The dispatch address in R24_dispatch_addr is used for the |
| // dispatch. |
| void InterpreterMacroAssembler::dispatch_epilog(TosState state, int bcp_incr) { |
| if (bcp_incr) { addi(R14_bcp, R14_bcp, bcp_incr); } |
| mtctr(R24_dispatch_addr); |
| bcctr(bcondAlways, 0, bhintbhBCCTRisNotPredictable); |
| } |
| |
| void InterpreterMacroAssembler::check_and_handle_popframe(Register scratch_reg) { |
| assert(scratch_reg != R0, "can't use R0 as scratch_reg here"); |
| if (JvmtiExport::can_pop_frame()) { |
| Label L; |
| |
| // Check the "pending popframe condition" flag in the current thread. |
| lwz(scratch_reg, in_bytes(JavaThread::popframe_condition_offset()), R16_thread); |
| |
| // Initiate popframe handling only if it is not already being |
| // processed. If the flag has the popframe_processing bit set, it |
| // means that this code is called *during* popframe handling - we |
| // don't want to reenter. |
| andi_(R0, scratch_reg, JavaThread::popframe_pending_bit); |
| beq(CCR0, L); |
| |
| andi_(R0, scratch_reg, JavaThread::popframe_processing_bit); |
| bne(CCR0, L); |
| |
| // Call the Interpreter::remove_activation_preserving_args_entry() |
| // func to get the address of the same-named entrypoint in the |
| // generated interpreter code. |
| #if defined(ABI_ELFv2) |
| call_c(CAST_FROM_FN_PTR(address, |
| Interpreter::remove_activation_preserving_args_entry), |
| relocInfo::none); |
| #else |
| call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, |
| Interpreter::remove_activation_preserving_args_entry), |
| relocInfo::none); |
| #endif |
| |
| // Jump to Interpreter::_remove_activation_preserving_args_entry. |
| mtctr(R3_RET); |
| bctr(); |
| |
| align(32, 12); |
| bind(L); |
| } |
| } |
| |
| void InterpreterMacroAssembler::check_and_handle_earlyret(Register scratch_reg) { |
| const Register Rthr_state_addr = scratch_reg; |
| if (JvmtiExport::can_force_early_return()) { |
| Label Lno_early_ret; |
| ld(Rthr_state_addr, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread); |
| cmpdi(CCR0, Rthr_state_addr, 0); |
| beq(CCR0, Lno_early_ret); |
| |
| lwz(R0, in_bytes(JvmtiThreadState::earlyret_state_offset()), Rthr_state_addr); |
| cmpwi(CCR0, R0, JvmtiThreadState::earlyret_pending); |
| bne(CCR0, Lno_early_ret); |
| |
| // Jump to Interpreter::_earlyret_entry. |
| lwz(R3_ARG1, in_bytes(JvmtiThreadState::earlyret_tos_offset()), Rthr_state_addr); |
| call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry)); |
| mtlr(R3_RET); |
| blr(); |
| |
| align(32, 12); |
| bind(Lno_early_ret); |
| } |
| } |
| |
| void InterpreterMacroAssembler::load_earlyret_value(TosState state, Register Rscratch1) { |
| const Register RjvmtiState = Rscratch1; |
| const Register Rscratch2 = R0; |
| |
| ld(RjvmtiState, in_bytes(JavaThread::jvmti_thread_state_offset()), R16_thread); |
| li(Rscratch2, 0); |
| |
| switch (state) { |
| case atos: ld(R17_tos, in_bytes(JvmtiThreadState::earlyret_oop_offset()), RjvmtiState); |
| std(Rscratch2, in_bytes(JvmtiThreadState::earlyret_oop_offset()), RjvmtiState); |
| break; |
| case ltos: ld(R17_tos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState); |
| break; |
| case btos: // fall through |
| case ztos: // fall through |
| case ctos: // fall through |
| case stos: // fall through |
| case itos: lwz(R17_tos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState); |
| break; |
| case ftos: lfs(F15_ftos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState); |
| break; |
| case dtos: lfd(F15_ftos, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState); |
| break; |
| case vtos: break; |
| default : ShouldNotReachHere(); |
| } |
| |
| // Clean up tos value in the jvmti thread state. |
| std(Rscratch2, in_bytes(JvmtiThreadState::earlyret_value_offset()), RjvmtiState); |
| // Set tos state field to illegal value. |
| li(Rscratch2, ilgl); |
| stw(Rscratch2, in_bytes(JvmtiThreadState::earlyret_tos_offset()), RjvmtiState); |
| } |
| |
| // Common code to dispatch and dispatch_only. |
| // Dispatch value in Lbyte_code and increment Lbcp. |
| |
| void InterpreterMacroAssembler::load_dispatch_table(Register dst, address* table) { |
| address table_base = (address)Interpreter::dispatch_table((TosState)0); |
| intptr_t table_offs = (intptr_t)table - (intptr_t)table_base; |
| if (is_simm16(table_offs)) { |
| addi(dst, R25_templateTableBase, (int)table_offs); |
| } else { |
| load_const_optimized(dst, table, R0); |
| } |
| } |
| |
| void InterpreterMacroAssembler::dispatch_Lbyte_code(TosState state, Register bytecode, |
| address* table, bool verify) { |
| if (verify) { |
| unimplemented("dispatch_Lbyte_code: verify"); // See Sparc Implementation to implement this |
| } |
| |
| assert_different_registers(bytecode, R11_scratch1); |
| |
| // Calc dispatch table address. |
| load_dispatch_table(R11_scratch1, table); |
| |
| sldi(R12_scratch2, bytecode, LogBytesPerWord); |
| ldx(R11_scratch1, R11_scratch1, R12_scratch2); |
| |
| // Jump off! |
| mtctr(R11_scratch1); |
| bcctr(bcondAlways, 0, bhintbhBCCTRisNotPredictable); |
| } |
| |
| void InterpreterMacroAssembler::load_receiver(Register Rparam_count, Register Rrecv_dst) { |
| sldi(Rrecv_dst, Rparam_count, Interpreter::logStackElementSize); |
| ldx(Rrecv_dst, Rrecv_dst, R15_esp); |
| } |
| |
| // helpers for expression stack |
| |
| void InterpreterMacroAssembler::pop_i(Register r) { |
| lwzu(r, Interpreter::stackElementSize, R15_esp); |
| } |
| |
| void InterpreterMacroAssembler::pop_ptr(Register r) { |
| ldu(r, Interpreter::stackElementSize, R15_esp); |
| } |
| |
| void InterpreterMacroAssembler::pop_l(Register r) { |
| ld(r, Interpreter::stackElementSize, R15_esp); |
| addi(R15_esp, R15_esp, 2 * Interpreter::stackElementSize); |
| } |
| |
| void InterpreterMacroAssembler::pop_f(FloatRegister f) { |
| lfsu(f, Interpreter::stackElementSize, R15_esp); |
| } |
| |
| void InterpreterMacroAssembler::pop_d(FloatRegister f) { |
| lfd(f, Interpreter::stackElementSize, R15_esp); |
| addi(R15_esp, R15_esp, 2 * Interpreter::stackElementSize); |
| } |
| |
| void InterpreterMacroAssembler::push_i(Register r) { |
| stw(r, 0, R15_esp); |
| addi(R15_esp, R15_esp, - Interpreter::stackElementSize ); |
| } |
| |
| void InterpreterMacroAssembler::push_ptr(Register r) { |
| std(r, 0, R15_esp); |
| addi(R15_esp, R15_esp, - Interpreter::stackElementSize ); |
| } |
| |
| void InterpreterMacroAssembler::push_l(Register r) { |
| // Clear unused slot. |
| load_const_optimized(R0, 0L); |
| std(R0, 0, R15_esp); |
| std(r, - Interpreter::stackElementSize, R15_esp); |
| addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize ); |
| } |
| |
| void InterpreterMacroAssembler::push_f(FloatRegister f) { |
| stfs(f, 0, R15_esp); |
| addi(R15_esp, R15_esp, - Interpreter::stackElementSize ); |
| } |
| |
| void InterpreterMacroAssembler::push_d(FloatRegister f) { |
| stfd(f, - Interpreter::stackElementSize, R15_esp); |
| addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize ); |
| } |
| |
| void InterpreterMacroAssembler::push_2ptrs(Register first, Register second) { |
| std(first, 0, R15_esp); |
| std(second, -Interpreter::stackElementSize, R15_esp); |
| addi(R15_esp, R15_esp, - 2 * Interpreter::stackElementSize ); |
| } |
| |
| void InterpreterMacroAssembler::move_l_to_d(Register l, FloatRegister d) { |
| if (VM_Version::has_mtfprd()) { |
| mtfprd(d, l); |
| } else { |
| std(l, 0, R15_esp); |
| lfd(d, 0, R15_esp); |
| } |
| } |
| |
| void InterpreterMacroAssembler::move_d_to_l(FloatRegister d, Register l) { |
| if (VM_Version::has_mtfprd()) { |
| mffprd(l, d); |
| } else { |
| stfd(d, 0, R15_esp); |
| ld(l, 0, R15_esp); |
| } |
| } |
| |
| void InterpreterMacroAssembler::push(TosState state) { |
| switch (state) { |
| case atos: push_ptr(); break; |
| case btos: |
| case ztos: |
| case ctos: |
| case stos: |
| case itos: push_i(); break; |
| case ltos: push_l(); break; |
| case ftos: push_f(); break; |
| case dtos: push_d(); break; |
| case vtos: /* nothing to do */ break; |
| default : ShouldNotReachHere(); |
| } |
| } |
| |
| void InterpreterMacroAssembler::pop(TosState state) { |
| switch (state) { |
| case atos: pop_ptr(); break; |
| case btos: |
| case ztos: |
| case ctos: |
| case stos: |
| case itos: pop_i(); break; |
| case ltos: pop_l(); break; |
| case ftos: pop_f(); break; |
| case dtos: pop_d(); break; |
| case vtos: /* nothing to do */ break; |
| default : ShouldNotReachHere(); |
| } |
| verify_oop(R17_tos, state); |
| } |
| |
| void InterpreterMacroAssembler::empty_expression_stack() { |
| addi(R15_esp, R26_monitor, - Interpreter::stackElementSize); |
| } |
| |
| void InterpreterMacroAssembler::get_2_byte_integer_at_bcp(int bcp_offset, |
| Register Rdst, |
| signedOrNot is_signed) { |
| #if defined(VM_LITTLE_ENDIAN) |
| if (bcp_offset) { |
| load_const_optimized(Rdst, bcp_offset); |
| lhbrx(Rdst, R14_bcp, Rdst); |
| } else { |
| lhbrx(Rdst, R14_bcp); |
| } |
| if (is_signed == Signed) { |
| extsh(Rdst, Rdst); |
| } |
| #else |
| // Read Java big endian format. |
| if (is_signed == Signed) { |
| lha(Rdst, bcp_offset, R14_bcp); |
| } else { |
| lhz(Rdst, bcp_offset, R14_bcp); |
| } |
| #endif |
| } |
| |
| void InterpreterMacroAssembler::get_4_byte_integer_at_bcp(int bcp_offset, |
| Register Rdst, |
| signedOrNot is_signed) { |
| #if defined(VM_LITTLE_ENDIAN) |
| if (bcp_offset) { |
| load_const_optimized(Rdst, bcp_offset); |
| lwbrx(Rdst, R14_bcp, Rdst); |
| } else { |
| lwbrx(Rdst, R14_bcp); |
| } |
| if (is_signed == Signed) { |
| extsw(Rdst, Rdst); |
| } |
| #else |
| // Read Java big endian format. |
| if (bcp_offset & 3) { // Offset unaligned? |
| load_const_optimized(Rdst, bcp_offset); |
| if (is_signed == Signed) { |
| lwax(Rdst, R14_bcp, Rdst); |
| } else { |
| lwzx(Rdst, R14_bcp, Rdst); |
| } |
| } else { |
| if (is_signed == Signed) { |
| lwa(Rdst, bcp_offset, R14_bcp); |
| } else { |
| lwz(Rdst, bcp_offset, R14_bcp); |
| } |
| } |
| #endif |
| } |
| |
| |
| // Load the constant pool cache index from the bytecode stream. |
| // |
| // Kills / writes: |
| // - Rdst, Rscratch |
| void InterpreterMacroAssembler::get_cache_index_at_bcp(Register Rdst, int bcp_offset, |
| size_t index_size) { |
| assert(bcp_offset > 0, "bcp is still pointing to start of bytecode"); |
| // Cache index is always in the native format, courtesy of Rewriter. |
| if (index_size == sizeof(u2)) { |
| lhz(Rdst, bcp_offset, R14_bcp); |
| } else if (index_size == sizeof(u4)) { |
| if (bcp_offset & 3) { |
| load_const_optimized(Rdst, bcp_offset); |
| lwax(Rdst, R14_bcp, Rdst); |
| } else { |
| lwa(Rdst, bcp_offset, R14_bcp); |
| } |
| assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line"); |
| nand(Rdst, Rdst, Rdst); // convert to plain index |
| } else if (index_size == sizeof(u1)) { |
| lbz(Rdst, bcp_offset, R14_bcp); |
| } else { |
| ShouldNotReachHere(); |
| } |
| // Rdst now contains cp cache index. |
| } |
| |
| void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache, int bcp_offset, |
| size_t index_size) { |
| get_cache_index_at_bcp(cache, bcp_offset, index_size); |
| sldi(cache, cache, exact_log2(in_words(ConstantPoolCacheEntry::size()) * BytesPerWord)); |
| add(cache, R27_constPoolCache, cache); |
| } |
| |
| // Load 4-byte signed or unsigned integer in Java format (that is, big-endian format) |
| // from (Rsrc)+offset. |
| void InterpreterMacroAssembler::get_u4(Register Rdst, Register Rsrc, int offset, |
| signedOrNot is_signed) { |
| #if defined(VM_LITTLE_ENDIAN) |
| if (offset) { |
| load_const_optimized(Rdst, offset); |
| lwbrx(Rdst, Rdst, Rsrc); |
| } else { |
| lwbrx(Rdst, Rsrc); |
| } |
| if (is_signed == Signed) { |
| extsw(Rdst, Rdst); |
| } |
| #else |
| if (is_signed == Signed) { |
| lwa(Rdst, offset, Rsrc); |
| } else { |
| lwz(Rdst, offset, Rsrc); |
| } |
| #endif |
| } |
| |
| // Load object from cpool->resolved_references(index). |
| void InterpreterMacroAssembler::load_resolved_reference_at_index(Register result, Register index, Label *is_null) { |
| assert_different_registers(result, index); |
| get_constant_pool(result); |
| |
| // Convert from field index to resolved_references() index and from |
| // word index to byte offset. Since this is a java object, it can be compressed. |
| Register tmp = index; // reuse |
| sldi(tmp, index, LogBytesPerHeapOop); |
| // Load pointer for resolved_references[] objArray. |
| ld(result, ConstantPool::cache_offset_in_bytes(), result); |
| ld(result, ConstantPoolCache::resolved_references_offset_in_bytes(), result); |
| resolve_oop_handle(result); |
| #ifdef ASSERT |
| Label index_ok; |
| lwa(R0, arrayOopDesc::length_offset_in_bytes(), result); |
| sldi(R0, R0, LogBytesPerHeapOop); |
| cmpd(CCR0, tmp, R0); |
| blt(CCR0, index_ok); |
| stop("resolved reference index out of bounds", 0x09256); |
| bind(index_ok); |
| #endif |
| // Add in the index. |
| add(result, tmp, result); |
| load_heap_oop(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT), result, is_null); |
| } |
| |
| // load cpool->resolved_klass_at(index) |
| void InterpreterMacroAssembler::load_resolved_klass_at_offset(Register Rcpool, Register Roffset, Register Rklass) { |
| // int value = *(Rcpool->int_at_addr(which)); |
| // int resolved_klass_index = extract_low_short_from_int(value); |
| add(Roffset, Rcpool, Roffset); |
| #if defined(VM_LITTLE_ENDIAN) |
| lhz(Roffset, sizeof(ConstantPool), Roffset); // Roffset = resolved_klass_index |
| #else |
| lhz(Roffset, sizeof(ConstantPool) + 2, Roffset); // Roffset = resolved_klass_index |
| #endif |
| |
| ld(Rklass, ConstantPool::resolved_klasses_offset_in_bytes(), Rcpool); // Rklass = Rcpool->_resolved_klasses |
| |
| sldi(Roffset, Roffset, LogBytesPerWord); |
| addi(Roffset, Roffset, Array<Klass*>::base_offset_in_bytes()); |
| isync(); // Order load of instance Klass wrt. tags. |
| ldx(Rklass, Rklass, Roffset); |
| } |
| |
| // Generate a subtype check: branch to ok_is_subtype if sub_klass is |
| // a subtype of super_klass. Blows registers Rsub_klass, tmp1, tmp2. |
| void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass, Register Rsuper_klass, Register Rtmp1, |
| Register Rtmp2, Register Rtmp3, Label &ok_is_subtype) { |
| // Profile the not-null value's klass. |
| profile_typecheck(Rsub_klass, Rtmp1, Rtmp2); |
| check_klass_subtype(Rsub_klass, Rsuper_klass, Rtmp1, Rtmp2, ok_is_subtype); |
| profile_typecheck_failed(Rtmp1, Rtmp2); |
| } |
| |
| // Separate these two to allow for delay slot in middle. |
| // These are used to do a test and full jump to exception-throwing code. |
| |
| // Check that index is in range for array, then shift index by index_shift, |
| // and put arrayOop + shifted_index into res. |
| // Note: res is still shy of address by array offset into object. |
| |
| void InterpreterMacroAssembler::index_check_without_pop(Register Rarray, Register Rindex, |
| int index_shift, Register Rtmp, Register Rres) { |
| // Check that index is in range for array, then shift index by index_shift, |
| // and put arrayOop + shifted_index into res. |
| // Note: res is still shy of address by array offset into object. |
| // Kills: |
| // - Rindex |
| // Writes: |
| // - Rres: Address that corresponds to the array index if check was successful. |
| verify_oop(Rarray); |
| const Register Rlength = R0; |
| const Register RsxtIndex = Rtmp; |
| Label LisNull, LnotOOR; |
| |
| // Array nullcheck |
| if (!ImplicitNullChecks) { |
| cmpdi(CCR0, Rarray, 0); |
| beq(CCR0, LisNull); |
| } else { |
| null_check_throw(Rarray, arrayOopDesc::length_offset_in_bytes(), /*temp*/RsxtIndex); |
| } |
| |
| // Rindex might contain garbage in upper bits (remember that we don't sign extend |
| // during integer arithmetic operations). So kill them and put value into same register |
| // where ArrayIndexOutOfBounds would expect the index in. |
| rldicl(RsxtIndex, Rindex, 0, 32); // zero extend 32 bit -> 64 bit |
| |
| // Index check |
| lwz(Rlength, arrayOopDesc::length_offset_in_bytes(), Rarray); |
| cmplw(CCR0, Rindex, Rlength); |
| sldi(RsxtIndex, RsxtIndex, index_shift); |
| blt(CCR0, LnotOOR); |
| // Index should be in R17_tos, array should be in R4_ARG2. |
| mr_if_needed(R17_tos, Rindex); |
| mr_if_needed(R4_ARG2, Rarray); |
| load_dispatch_table(Rtmp, (address*)Interpreter::_throw_ArrayIndexOutOfBoundsException_entry); |
| mtctr(Rtmp); |
| bctr(); |
| |
| if (!ImplicitNullChecks) { |
| bind(LisNull); |
| load_dispatch_table(Rtmp, (address*)Interpreter::_throw_NullPointerException_entry); |
| mtctr(Rtmp); |
| bctr(); |
| } |
| |
| align(32, 16); |
| bind(LnotOOR); |
| |
| // Calc address |
| add(Rres, RsxtIndex, Rarray); |
| } |
| |
| void InterpreterMacroAssembler::index_check(Register array, Register index, |
| int index_shift, Register tmp, Register res) { |
| // pop array |
| pop_ptr(array); |
| |
| // check array |
| index_check_without_pop(array, index, index_shift, tmp, res); |
| } |
| |
| void InterpreterMacroAssembler::get_const(Register Rdst) { |
| ld(Rdst, in_bytes(Method::const_offset()), R19_method); |
| } |
| |
| void InterpreterMacroAssembler::get_constant_pool(Register Rdst) { |
| get_const(Rdst); |
| ld(Rdst, in_bytes(ConstMethod::constants_offset()), Rdst); |
| } |
| |
| void InterpreterMacroAssembler::get_constant_pool_cache(Register Rdst) { |
| get_constant_pool(Rdst); |
| ld(Rdst, ConstantPool::cache_offset_in_bytes(), Rdst); |
| } |
| |
| void InterpreterMacroAssembler::get_cpool_and_tags(Register Rcpool, Register Rtags) { |
| get_constant_pool(Rcpool); |
| ld(Rtags, ConstantPool::tags_offset_in_bytes(), Rcpool); |
| } |
| |
| // Unlock if synchronized method. |
| // |
| // Unlock the receiver if this is a synchronized method. |
| // Unlock any Java monitors from synchronized blocks. |
| // |
| // If there are locked Java monitors |
| // If throw_monitor_exception |
| // throws IllegalMonitorStateException |
| // Else if install_monitor_exception |
| // installs IllegalMonitorStateException |
| // Else |
| // no error processing |
| void InterpreterMacroAssembler::unlock_if_synchronized_method(TosState state, |
| bool throw_monitor_exception, |
| bool install_monitor_exception) { |
| Label Lunlocked, Lno_unlock; |
| { |
| Register Rdo_not_unlock_flag = R11_scratch1; |
| Register Raccess_flags = R12_scratch2; |
| |
| // Check if synchronized method or unlocking prevented by |
| // JavaThread::do_not_unlock_if_synchronized flag. |
| lbz(Rdo_not_unlock_flag, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); |
| lwz(Raccess_flags, in_bytes(Method::access_flags_offset()), R19_method); |
| li(R0, 0); |
| stb(R0, in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()), R16_thread); // reset flag |
| |
| push(state); |
| |
| // Skip if we don't have to unlock. |
| rldicl_(R0, Raccess_flags, 64-JVM_ACC_SYNCHRONIZED_BIT, 63); // Extract bit and compare to 0. |
| beq(CCR0, Lunlocked); |
| |
| cmpwi(CCR0, Rdo_not_unlock_flag, 0); |
| bne(CCR0, Lno_unlock); |
| } |
| |
| // Unlock |
| { |
| Register Rmonitor_base = R11_scratch1; |
| |
| Label Lunlock; |
| // If it's still locked, everything is ok, unlock it. |
| ld(Rmonitor_base, 0, R1_SP); |
| addi(Rmonitor_base, Rmonitor_base, |
| -(frame::ijava_state_size + frame::interpreter_frame_monitor_size_in_bytes())); // Monitor base |
| |
| ld(R0, BasicObjectLock::obj_offset_in_bytes(), Rmonitor_base); |
| cmpdi(CCR0, R0, 0); |
| bne(CCR0, Lunlock); |
| |
| // If it's already unlocked, throw exception. |
| if (throw_monitor_exception) { |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); |
| should_not_reach_here(); |
| } else { |
| if (install_monitor_exception) { |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception)); |
| b(Lunlocked); |
| } |
| } |
| |
| bind(Lunlock); |
| unlock_object(Rmonitor_base); |
| } |
| |
| // Check that all other monitors are unlocked. Throw IllegelMonitorState exception if not. |
| bind(Lunlocked); |
| { |
| Label Lexception, Lrestart; |
| Register Rcurrent_obj_addr = R11_scratch1; |
| const int delta = frame::interpreter_frame_monitor_size_in_bytes(); |
| assert((delta & LongAlignmentMask) == 0, "sizeof BasicObjectLock must be even number of doublewords"); |
| |
| bind(Lrestart); |
| // Set up search loop: Calc num of iterations. |
| { |
| Register Riterations = R12_scratch2; |
| Register Rmonitor_base = Rcurrent_obj_addr; |
| ld(Rmonitor_base, 0, R1_SP); |
| addi(Rmonitor_base, Rmonitor_base, - frame::ijava_state_size); // Monitor base |
| |
| subf_(Riterations, R26_monitor, Rmonitor_base); |
| ble(CCR0, Lno_unlock); |
| |
| addi(Rcurrent_obj_addr, Rmonitor_base, |
| BasicObjectLock::obj_offset_in_bytes() - frame::interpreter_frame_monitor_size_in_bytes()); |
| // Check if any monitor is on stack, bail out if not |
| srdi(Riterations, Riterations, exact_log2(delta)); |
| mtctr(Riterations); |
| } |
| |
| // The search loop: Look for locked monitors. |
| { |
| const Register Rcurrent_obj = R0; |
| Label Lloop; |
| |
| ld(Rcurrent_obj, 0, Rcurrent_obj_addr); |
| addi(Rcurrent_obj_addr, Rcurrent_obj_addr, -delta); |
| bind(Lloop); |
| |
| // Check if current entry is used. |
| cmpdi(CCR0, Rcurrent_obj, 0); |
| bne(CCR0, Lexception); |
| // Preload next iteration's compare value. |
| ld(Rcurrent_obj, 0, Rcurrent_obj_addr); |
| addi(Rcurrent_obj_addr, Rcurrent_obj_addr, -delta); |
| bdnz(Lloop); |
| } |
| // Fell through: Everything's unlocked => finish. |
| b(Lno_unlock); |
| |
| // An object is still locked => need to throw exception. |
| bind(Lexception); |
| if (throw_monitor_exception) { |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_illegal_monitor_state_exception)); |
| should_not_reach_here(); |
| } else { |
| // Stack unrolling. Unlock object and if requested, install illegal_monitor_exception. |
| // Unlock does not block, so don't have to worry about the frame. |
| Register Rmonitor_addr = R11_scratch1; |
| addi(Rmonitor_addr, Rcurrent_obj_addr, -BasicObjectLock::obj_offset_in_bytes() + delta); |
| unlock_object(Rmonitor_addr); |
| if (install_monitor_exception) { |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::new_illegal_monitor_state_exception)); |
| } |
| b(Lrestart); |
| } |
| } |
| |
| align(32, 12); |
| bind(Lno_unlock); |
| pop(state); |
| } |
| |
| // Support function for remove_activation & Co. |
| void InterpreterMacroAssembler::merge_frames(Register Rsender_sp, Register return_pc, |
| Register Rscratch1, Register Rscratch2) { |
| // Pop interpreter frame. |
| ld(Rscratch1, 0, R1_SP); // *SP |
| ld(Rsender_sp, _ijava_state_neg(sender_sp), Rscratch1); // top_frame_sp |
| ld(Rscratch2, 0, Rscratch1); // **SP |
| #ifdef ASSERT |
| { |
| Label Lok; |
| ld(R0, _ijava_state_neg(ijava_reserved), Rscratch1); |
| cmpdi(CCR0, R0, 0x5afe); |
| beq(CCR0, Lok); |
| stop("frame corrupted (remove activation)", 0x5afe); |
| bind(Lok); |
| } |
| #endif |
| if (return_pc!=noreg) { |
| ld(return_pc, _abi(lr), Rscratch1); // LR |
| } |
| |
| // Merge top frames. |
| subf(Rscratch1, R1_SP, Rsender_sp); // top_frame_sp - SP |
| stdux(Rscratch2, R1_SP, Rscratch1); // atomically set *(SP = top_frame_sp) = **SP |
| } |
| |
| void InterpreterMacroAssembler::narrow(Register result) { |
| Register ret_type = R11_scratch1; |
| ld(R11_scratch1, in_bytes(Method::const_offset()), R19_method); |
| lbz(ret_type, in_bytes(ConstMethod::result_type_offset()), R11_scratch1); |
| |
| Label notBool, notByte, notChar, done; |
| |
| // common case first |
| cmpwi(CCR0, ret_type, T_INT); |
| beq(CCR0, done); |
| |
| cmpwi(CCR0, ret_type, T_BOOLEAN); |
| bne(CCR0, notBool); |
| andi(result, result, 0x1); |
| b(done); |
| |
| bind(notBool); |
| cmpwi(CCR0, ret_type, T_BYTE); |
| bne(CCR0, notByte); |
| extsb(result, result); |
| b(done); |
| |
| bind(notByte); |
| cmpwi(CCR0, ret_type, T_CHAR); |
| bne(CCR0, notChar); |
| andi(result, result, 0xffff); |
| b(done); |
| |
| bind(notChar); |
| // cmpwi(CCR0, ret_type, T_SHORT); // all that's left |
| // bne(CCR0, done); |
| extsh(result, result); |
| |
| // Nothing to do for T_INT |
| bind(done); |
| } |
| |
| // Remove activation. |
| // |
| // Unlock the receiver if this is a synchronized method. |
| // Unlock any Java monitors from synchronized blocks. |
| // Remove the activation from the stack. |
| // |
| // If there are locked Java monitors |
| // If throw_monitor_exception |
| // throws IllegalMonitorStateException |
| // Else if install_monitor_exception |
| // installs IllegalMonitorStateException |
| // Else |
| // no error processing |
| void InterpreterMacroAssembler::remove_activation(TosState state, |
| bool throw_monitor_exception, |
| bool install_monitor_exception) { |
| BLOCK_COMMENT("remove_activation {"); |
| unlock_if_synchronized_method(state, throw_monitor_exception, install_monitor_exception); |
| |
| // Save result (push state before jvmti call and pop it afterwards) and notify jvmti. |
| notify_method_exit(false, state, NotifyJVMTI, true); |
| |
| BLOCK_COMMENT("reserved_stack_check:"); |
| if (StackReservedPages > 0) { |
| // Test if reserved zone needs to be enabled. |
| Label no_reserved_zone_enabling; |
| |
| // Compare frame pointers. There is no good stack pointer, as with stack |
| // frame compression we can get different SPs when we do calls. A subsequent |
| // call could have a smaller SP, so that this compare succeeds for an |
| // inner call of the method annotated with ReservedStack. |
| ld_ptr(R0, JavaThread::reserved_stack_activation_offset(), R16_thread); |
| ld_ptr(R11_scratch1, _abi(callers_sp), R1_SP); // Load frame pointer. |
| cmpld(CCR0, R11_scratch1, R0); |
| blt_predict_taken(CCR0, no_reserved_zone_enabling); |
| |
| // Enable reserved zone again, throw stack overflow exception. |
| call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::enable_stack_reserved_zone), R16_thread); |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_delayed_StackOverflowError)); |
| |
| should_not_reach_here(); |
| |
| bind(no_reserved_zone_enabling); |
| } |
| |
| verify_oop(R17_tos, state); |
| verify_thread(); |
| |
| merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ R0, R11_scratch1, R12_scratch2); |
| mtlr(R0); |
| BLOCK_COMMENT("} remove_activation"); |
| } |
| |
| // Lock object |
| // |
| // Registers alive |
| // monitor - Address of the BasicObjectLock to be used for locking, |
| // which must be initialized with the object to lock. |
| // object - Address of the object to be locked. |
| // |
| void InterpreterMacroAssembler::lock_object(Register monitor, Register object) { |
| if (UseHeavyMonitors) { |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), |
| monitor, /*check_for_exceptions=*/true); |
| } else { |
| // template code: |
| // |
| // markOop displaced_header = obj->mark().set_unlocked(); |
| // monitor->lock()->set_displaced_header(displaced_header); |
| // if (Atomic::cmpxchg_ptr(/*ex=*/monitor, /*addr*/obj->mark_addr(), /*cmp*/displaced_header) == displaced_header) { |
| // // We stored the monitor address into the object's mark word. |
| // } else if (THREAD->is_lock_owned((address)displaced_header)) |
| // // Simple recursive case. |
| // monitor->lock()->set_displaced_header(NULL); |
| // } else { |
| // // Slow path. |
| // InterpreterRuntime::monitorenter(THREAD, monitor); |
| // } |
| |
| const Register displaced_header = R7_ARG5; |
| const Register object_mark_addr = R8_ARG6; |
| const Register current_header = R9_ARG7; |
| const Register tmp = R10_ARG8; |
| |
| Label done; |
| Label cas_failed, slow_case; |
| |
| assert_different_registers(displaced_header, object_mark_addr, current_header, tmp); |
| |
| // markOop displaced_header = obj->mark().set_unlocked(); |
| |
| // Load markOop from object into displaced_header. |
| ld(displaced_header, oopDesc::mark_offset_in_bytes(), object); |
| |
| if (UseBiasedLocking) { |
| biased_locking_enter(CCR0, object, displaced_header, tmp, current_header, done, &slow_case); |
| } |
| |
| // Set displaced_header to be (markOop of object | UNLOCK_VALUE). |
| ori(displaced_header, displaced_header, markOopDesc::unlocked_value); |
| |
| // monitor->lock()->set_displaced_header(displaced_header); |
| |
| // Initialize the box (Must happen before we update the object mark!). |
| std(displaced_header, BasicObjectLock::lock_offset_in_bytes() + |
| BasicLock::displaced_header_offset_in_bytes(), monitor); |
| |
| // if (Atomic::cmpxchg_ptr(/*ex=*/monitor, /*addr*/obj->mark_addr(), /*cmp*/displaced_header) == displaced_header) { |
| |
| // Store stack address of the BasicObjectLock (this is monitor) into object. |
| addi(object_mark_addr, object, oopDesc::mark_offset_in_bytes()); |
| |
| // Must fence, otherwise, preceding store(s) may float below cmpxchg. |
| // CmpxchgX sets CCR0 to cmpX(current, displaced). |
| cmpxchgd(/*flag=*/CCR0, |
| /*current_value=*/current_header, |
| /*compare_value=*/displaced_header, /*exchange_value=*/monitor, |
| /*where=*/object_mark_addr, |
| MacroAssembler::MemBarRel | MacroAssembler::MemBarAcq, |
| MacroAssembler::cmpxchgx_hint_acquire_lock(), |
| noreg, |
| &cas_failed, |
| /*check without membar and ldarx first*/true); |
| |
| // If the compare-and-exchange succeeded, then we found an unlocked |
| // object and we have now locked it. |
| b(done); |
| bind(cas_failed); |
| |
| // } else if (THREAD->is_lock_owned((address)displaced_header)) |
| // // Simple recursive case. |
| // monitor->lock()->set_displaced_header(NULL); |
| |
| // We did not see an unlocked object so try the fast recursive case. |
| |
| // Check if owner is self by comparing the value in the markOop of object |
| // (current_header) with the stack pointer. |
| sub(current_header, current_header, R1_SP); |
| |
| assert(os::vm_page_size() > 0xfff, "page size too small - change the constant"); |
| load_const_optimized(tmp, ~(os::vm_page_size()-1) | markOopDesc::lock_mask_in_place); |
| |
| and_(R0/*==0?*/, current_header, tmp); |
| // If condition is true we are done and hence we can store 0 in the displaced |
| // header indicating it is a recursive lock. |
| bne(CCR0, slow_case); |
| std(R0/*==0!*/, BasicObjectLock::lock_offset_in_bytes() + |
| BasicLock::displaced_header_offset_in_bytes(), monitor); |
| b(done); |
| |
| // } else { |
| // // Slow path. |
| // InterpreterRuntime::monitorenter(THREAD, monitor); |
| |
| // None of the above fast optimizations worked so we have to get into the |
| // slow case of monitor enter. |
| bind(slow_case); |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter), |
| monitor, /*check_for_exceptions=*/true); |
| // } |
| align(32, 12); |
| bind(done); |
| } |
| } |
| |
| // Unlocks an object. Used in monitorexit bytecode and remove_activation. |
| // |
| // Registers alive |
| // monitor - Address of the BasicObjectLock to be used for locking, |
| // which must be initialized with the object to lock. |
| // |
| // Throw IllegalMonitorException if object is not locked by current thread. |
| void InterpreterMacroAssembler::unlock_object(Register monitor, bool check_for_exceptions) { |
| if (UseHeavyMonitors) { |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), |
| monitor, check_for_exceptions); |
| } else { |
| |
| // template code: |
| // |
| // if ((displaced_header = monitor->displaced_header()) == NULL) { |
| // // Recursive unlock. Mark the monitor unlocked by setting the object field to NULL. |
| // monitor->set_obj(NULL); |
| // } else if (Atomic::cmpxchg_ptr(displaced_header, obj->mark_addr(), monitor) == monitor) { |
| // // We swapped the unlocked mark in displaced_header into the object's mark word. |
| // monitor->set_obj(NULL); |
| // } else { |
| // // Slow path. |
| // InterpreterRuntime::monitorexit(THREAD, monitor); |
| // } |
| |
| const Register object = R7_ARG5; |
| const Register displaced_header = R8_ARG6; |
| const Register object_mark_addr = R9_ARG7; |
| const Register current_header = R10_ARG8; |
| |
| Label free_slot; |
| Label slow_case; |
| |
| assert_different_registers(object, displaced_header, object_mark_addr, current_header); |
| |
| if (UseBiasedLocking) { |
| // The object address from the monitor is in object. |
| ld(object, BasicObjectLock::obj_offset_in_bytes(), monitor); |
| assert(oopDesc::mark_offset_in_bytes() == 0, "offset of _mark is not 0"); |
| biased_locking_exit(CCR0, object, displaced_header, free_slot); |
| } |
| |
| // Test first if we are in the fast recursive case. |
| ld(displaced_header, BasicObjectLock::lock_offset_in_bytes() + |
| BasicLock::displaced_header_offset_in_bytes(), monitor); |
| |
| // If the displaced header is zero, we have a recursive unlock. |
| cmpdi(CCR0, displaced_header, 0); |
| beq(CCR0, free_slot); // recursive unlock |
| |
| // } else if (Atomic::cmpxchg_ptr(displaced_header, obj->mark_addr(), monitor) == monitor) { |
| // // We swapped the unlocked mark in displaced_header into the object's mark word. |
| // monitor->set_obj(NULL); |
| |
| // If we still have a lightweight lock, unlock the object and be done. |
| |
| // The object address from the monitor is in object. |
| if (!UseBiasedLocking) { ld(object, BasicObjectLock::obj_offset_in_bytes(), monitor); } |
| addi(object_mark_addr, object, oopDesc::mark_offset_in_bytes()); |
| |
| // We have the displaced header in displaced_header. If the lock is still |
| // lightweight, it will contain the monitor address and we'll store the |
| // displaced header back into the object's mark word. |
| // CmpxchgX sets CCR0 to cmpX(current, monitor). |
| cmpxchgd(/*flag=*/CCR0, |
| /*current_value=*/current_header, |
| /*compare_value=*/monitor, /*exchange_value=*/displaced_header, |
| /*where=*/object_mark_addr, |
| MacroAssembler::MemBarRel, |
| MacroAssembler::cmpxchgx_hint_release_lock(), |
| noreg, |
| &slow_case); |
| b(free_slot); |
| |
| // } else { |
| // // Slow path. |
| // InterpreterRuntime::monitorexit(THREAD, monitor); |
| |
| // The lock has been converted into a heavy lock and hence |
| // we need to get into the slow case. |
| bind(slow_case); |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit), |
| monitor, check_for_exceptions); |
| // } |
| |
| Label done; |
| b(done); // Monitor register may be overwritten! Runtime has already freed the slot. |
| |
| // Exchange worked, do monitor->set_obj(NULL); |
| align(32, 12); |
| bind(free_slot); |
| li(R0, 0); |
| std(R0, BasicObjectLock::obj_offset_in_bytes(), monitor); |
| bind(done); |
| } |
| } |
| |
| // Load compiled (i2c) or interpreter entry when calling from interpreted and |
| // do the call. Centralized so that all interpreter calls will do the same actions. |
| // If jvmti single stepping is on for a thread we must not call compiled code. |
| // |
| // Input: |
| // - Rtarget_method: method to call |
| // - Rret_addr: return address |
| // - 2 scratch regs |
| // |
| void InterpreterMacroAssembler::call_from_interpreter(Register Rtarget_method, Register Rret_addr, |
| Register Rscratch1, Register Rscratch2) { |
| assert_different_registers(Rscratch1, Rscratch2, Rtarget_method, Rret_addr); |
| // Assume we want to go compiled if available. |
| const Register Rtarget_addr = Rscratch1; |
| const Register Rinterp_only = Rscratch2; |
| |
| ld(Rtarget_addr, in_bytes(Method::from_interpreted_offset()), Rtarget_method); |
| |
| if (JvmtiExport::can_post_interpreter_events()) { |
| lwz(Rinterp_only, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread); |
| |
| // JVMTI events, such as single-stepping, are implemented partly by avoiding running |
| // compiled code in threads for which the event is enabled. Check here for |
| // interp_only_mode if these events CAN be enabled. |
| Label done; |
| verify_thread(); |
| cmpwi(CCR0, Rinterp_only, 0); |
| beq(CCR0, done); |
| ld(Rtarget_addr, in_bytes(Method::interpreter_entry_offset()), Rtarget_method); |
| align(32, 12); |
| bind(done); |
| } |
| |
| #ifdef ASSERT |
| { |
| Label Lok; |
| cmpdi(CCR0, Rtarget_addr, 0); |
| bne(CCR0, Lok); |
| stop("null entry point"); |
| bind(Lok); |
| } |
| #endif // ASSERT |
| |
| mr(R21_sender_SP, R1_SP); |
| |
| // Calc a precise SP for the call. The SP value we calculated in |
| // generate_fixed_frame() is based on the max_stack() value, so we would waste stack space |
| // if esp is not max. Also, the i2c adapter extends the stack space without restoring |
| // our pre-calced value, so repeating calls via i2c would result in stack overflow. |
| // Since esp already points to an empty slot, we just have to sub 1 additional slot |
| // to meet the abi scratch requirements. |
| // The max_stack pointer will get restored by means of the GR_Lmax_stack local in |
| // the return entry of the interpreter. |
| addi(Rscratch2, R15_esp, Interpreter::stackElementSize - frame::abi_reg_args_size); |
| clrrdi(Rscratch2, Rscratch2, exact_log2(frame::alignment_in_bytes)); // round towards smaller address |
| resize_frame_absolute(Rscratch2, Rscratch2, R0); |
| |
| mr_if_needed(R19_method, Rtarget_method); |
| mtctr(Rtarget_addr); |
| mtlr(Rret_addr); |
| |
| save_interpreter_state(Rscratch2); |
| #ifdef ASSERT |
| ld(Rscratch1, _ijava_state_neg(top_frame_sp), Rscratch2); // Rscratch2 contains fp |
| cmpd(CCR0, R21_sender_SP, Rscratch1); |
| asm_assert_eq("top_frame_sp incorrect", 0x951); |
| #endif |
| |
| bctr(); |
| } |
| |
| // Set the method data pointer for the current bcp. |
| void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| Label get_continue; |
| ld(R28_mdx, in_bytes(Method::method_data_offset()), R19_method); |
| test_method_data_pointer(get_continue); |
| call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), R19_method, R14_bcp); |
| |
| addi(R28_mdx, R28_mdx, in_bytes(MethodData::data_offset())); |
| add(R28_mdx, R28_mdx, R3_RET); |
| bind(get_continue); |
| } |
| |
| // Test ImethodDataPtr. If it is null, continue at the specified label. |
| void InterpreterMacroAssembler::test_method_data_pointer(Label& zero_continue) { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| cmpdi(CCR0, R28_mdx, 0); |
| beq(CCR0, zero_continue); |
| } |
| |
| void InterpreterMacroAssembler::verify_method_data_pointer() { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| #ifdef ASSERT |
| Label verify_continue; |
| test_method_data_pointer(verify_continue); |
| |
| // If the mdp is valid, it will point to a DataLayout header which is |
| // consistent with the bcp. The converse is highly probable also. |
| lhz(R11_scratch1, in_bytes(DataLayout::bci_offset()), R28_mdx); |
| ld(R12_scratch2, in_bytes(Method::const_offset()), R19_method); |
| addi(R11_scratch1, R11_scratch1, in_bytes(ConstMethod::codes_offset())); |
| add(R11_scratch1, R12_scratch2, R12_scratch2); |
| cmpd(CCR0, R11_scratch1, R14_bcp); |
| beq(CCR0, verify_continue); |
| |
| call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp ), R19_method, R14_bcp, R28_mdx); |
| |
| bind(verify_continue); |
| #endif |
| } |
| |
| void InterpreterMacroAssembler::test_invocation_counter_for_mdp(Register invocation_count, |
| Register method_counters, |
| Register Rscratch, |
| Label &profile_continue) { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| // Control will flow to "profile_continue" if the counter is less than the |
| // limit or if we call profile_method(). |
| Label done; |
| |
| // If no method data exists, and the counter is high enough, make one. |
| lwz(Rscratch, in_bytes(MethodCounters::interpreter_profile_limit_offset()), method_counters); |
| |
| cmpdi(CCR0, R28_mdx, 0); |
| // Test to see if we should create a method data oop. |
| cmpd(CCR1, Rscratch, invocation_count); |
| bne(CCR0, done); |
| bge(CCR1, profile_continue); |
| |
| // Build it now. |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); |
| set_method_data_pointer_for_bcp(); |
| b(profile_continue); |
| |
| align(32, 12); |
| bind(done); |
| } |
| |
| void InterpreterMacroAssembler::test_backedge_count_for_osr(Register backedge_count, Register method_counters, |
| Register target_bcp, Register disp, Register Rtmp) { |
| assert_different_registers(backedge_count, target_bcp, disp, Rtmp, R4_ARG2); |
| assert(UseOnStackReplacement,"Must UseOnStackReplacement to test_backedge_count_for_osr"); |
| |
| Label did_not_overflow; |
| Label overflow_with_error; |
| |
| lwz(Rtmp, in_bytes(MethodCounters::interpreter_backward_branch_limit_offset()), method_counters); |
| cmpw(CCR0, backedge_count, Rtmp); |
| |
| blt(CCR0, did_not_overflow); |
| |
| // When ProfileInterpreter is on, the backedge_count comes from the |
| // methodDataOop, which value does not get reset on the call to |
| // frequency_counter_overflow(). To avoid excessive calls to the overflow |
| // routine while the method is being compiled, add a second test to make sure |
| // the overflow function is called only once every overflow_frequency. |
| if (ProfileInterpreter) { |
| const int overflow_frequency = 1024; |
| andi_(Rtmp, backedge_count, overflow_frequency-1); |
| bne(CCR0, did_not_overflow); |
| } |
| |
| // Overflow in loop, pass branch bytecode. |
| subf(R4_ARG2, disp, target_bcp); // Compute branch bytecode (previous bcp). |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), R4_ARG2, true); |
| |
| // Was an OSR adapter generated? |
| cmpdi(CCR0, R3_RET, 0); |
| beq(CCR0, overflow_with_error); |
| |
| // Has the nmethod been invalidated already? |
| lbz(Rtmp, nmethod::state_offset(), R3_RET); |
| cmpwi(CCR0, Rtmp, nmethod::in_use); |
| bne(CCR0, overflow_with_error); |
| |
| // Migrate the interpreter frame off of the stack. |
| // We can use all registers because we will not return to interpreter from this point. |
| |
| // Save nmethod. |
| const Register osr_nmethod = R31; |
| mr(osr_nmethod, R3_RET); |
| set_top_ijava_frame_at_SP_as_last_Java_frame(R1_SP, R11_scratch1); |
| call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_begin), R16_thread); |
| reset_last_Java_frame(); |
| // OSR buffer is in ARG1 |
| |
| // Remove the interpreter frame. |
| merge_frames(/*top_frame_sp*/ R21_sender_SP, /*return_pc*/ R0, R11_scratch1, R12_scratch2); |
| |
| // Jump to the osr code. |
| ld(R11_scratch1, nmethod::osr_entry_point_offset(), osr_nmethod); |
| mtlr(R0); |
| mtctr(R11_scratch1); |
| bctr(); |
| |
| align(32, 12); |
| bind(overflow_with_error); |
| bind(did_not_overflow); |
| } |
| |
| // Store a value at some constant offset from the method data pointer. |
| void InterpreterMacroAssembler::set_mdp_data_at(int constant, Register value) { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| |
| std(value, constant, R28_mdx); |
| } |
| |
| // Increment the value at some constant offset from the method data pointer. |
| void InterpreterMacroAssembler::increment_mdp_data_at(int constant, |
| Register counter_addr, |
| Register Rbumped_count, |
| bool decrement) { |
| // Locate the counter at a fixed offset from the mdp: |
| addi(counter_addr, R28_mdx, constant); |
| increment_mdp_data_at(counter_addr, Rbumped_count, decrement); |
| } |
| |
| // Increment the value at some non-fixed (reg + constant) offset from |
| // the method data pointer. |
| void InterpreterMacroAssembler::increment_mdp_data_at(Register reg, |
| int constant, |
| Register scratch, |
| Register Rbumped_count, |
| bool decrement) { |
| // Add the constant to reg to get the offset. |
| add(scratch, R28_mdx, reg); |
| // Then calculate the counter address. |
| addi(scratch, scratch, constant); |
| increment_mdp_data_at(scratch, Rbumped_count, decrement); |
| } |
| |
| void InterpreterMacroAssembler::increment_mdp_data_at(Register counter_addr, |
| Register Rbumped_count, |
| bool decrement) { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| |
| // Load the counter. |
| ld(Rbumped_count, 0, counter_addr); |
| |
| if (decrement) { |
| // Decrement the register. Set condition codes. |
| addi(Rbumped_count, Rbumped_count, - DataLayout::counter_increment); |
| // Store the decremented counter, if it is still negative. |
| std(Rbumped_count, 0, counter_addr); |
| // Note: add/sub overflow check are not ported, since 64 bit |
| // calculation should never overflow. |
| } else { |
| // Increment the register. Set carry flag. |
| addi(Rbumped_count, Rbumped_count, DataLayout::counter_increment); |
| // Store the incremented counter. |
| std(Rbumped_count, 0, counter_addr); |
| } |
| } |
| |
| // Set a flag value at the current method data pointer position. |
| void InterpreterMacroAssembler::set_mdp_flag_at(int flag_constant, |
| Register scratch) { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| // Load the data header. |
| lbz(scratch, in_bytes(DataLayout::flags_offset()), R28_mdx); |
| // Set the flag. |
| ori(scratch, scratch, flag_constant); |
| // Store the modified header. |
| stb(scratch, in_bytes(DataLayout::flags_offset()), R28_mdx); |
| } |
| |
| // Test the location at some offset from the method data pointer. |
| // If it is not equal to value, branch to the not_equal_continue Label. |
| void InterpreterMacroAssembler::test_mdp_data_at(int offset, |
| Register value, |
| Label& not_equal_continue, |
| Register test_out) { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| |
| ld(test_out, offset, R28_mdx); |
| cmpd(CCR0, value, test_out); |
| bne(CCR0, not_equal_continue); |
| } |
| |
| // Update the method data pointer by the displacement located at some fixed |
| // offset from the method data pointer. |
| void InterpreterMacroAssembler::update_mdp_by_offset(int offset_of_disp, |
| Register scratch) { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| |
| ld(scratch, offset_of_disp, R28_mdx); |
| add(R28_mdx, scratch, R28_mdx); |
| } |
| |
| // Update the method data pointer by the displacement located at the |
| // offset (reg + offset_of_disp). |
| void InterpreterMacroAssembler::update_mdp_by_offset(Register reg, |
| int offset_of_disp, |
| Register scratch) { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| |
| add(scratch, reg, R28_mdx); |
| ld(scratch, offset_of_disp, scratch); |
| add(R28_mdx, scratch, R28_mdx); |
| } |
| |
| // Update the method data pointer by a simple constant displacement. |
| void InterpreterMacroAssembler::update_mdp_by_constant(int constant) { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| addi(R28_mdx, R28_mdx, constant); |
| } |
| |
| // Update the method data pointer for a _ret bytecode whose target |
| // was not among our cached targets. |
| void InterpreterMacroAssembler::update_mdp_for_ret(TosState state, |
| Register return_bci) { |
| assert(ProfileInterpreter, "must be profiling interpreter"); |
| |
| push(state); |
| assert(return_bci->is_nonvolatile(), "need to protect return_bci"); |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret), return_bci); |
| pop(state); |
| } |
| |
| // Increments the backedge counter. |
| // Returns backedge counter + invocation counter in Rdst. |
| void InterpreterMacroAssembler::increment_backedge_counter(const Register Rcounters, const Register Rdst, |
| const Register Rtmp1, Register Rscratch) { |
| assert(UseCompiler, "incrementing must be useful"); |
| assert_different_registers(Rdst, Rtmp1); |
| const Register invocation_counter = Rtmp1; |
| const Register counter = Rdst; |
| // TODO: PPC port: assert(4 == InvocationCounter::sz_counter(), "unexpected field size."); |
| |
| // Load backedge counter. |
| lwz(counter, in_bytes(MethodCounters::backedge_counter_offset()) + |
| in_bytes(InvocationCounter::counter_offset()), Rcounters); |
| // Load invocation counter. |
| lwz(invocation_counter, in_bytes(MethodCounters::invocation_counter_offset()) + |
| in_bytes(InvocationCounter::counter_offset()), Rcounters); |
| |
| // Add the delta to the backedge counter. |
| addi(counter, counter, InvocationCounter::count_increment); |
| |
| // Mask the invocation counter. |
| andi(invocation_counter, invocation_counter, InvocationCounter::count_mask_value); |
| |
| // Store new counter value. |
| stw(counter, in_bytes(MethodCounters::backedge_counter_offset()) + |
| in_bytes(InvocationCounter::counter_offset()), Rcounters); |
| // Return invocation counter + backedge counter. |
| add(counter, counter, invocation_counter); |
| } |
| |
| // Count a taken branch in the bytecodes. |
| void InterpreterMacroAssembler::profile_taken_branch(Register scratch, Register bumped_count) { |
| if (ProfileInterpreter) { |
| Label profile_continue; |
| |
| // If no method data exists, go to profile_continue. |
| test_method_data_pointer(profile_continue); |
| |
| // We are taking a branch. Increment the taken count. |
| increment_mdp_data_at(in_bytes(JumpData::taken_offset()), scratch, bumped_count); |
| |
| // The method data pointer needs to be updated to reflect the new target. |
| update_mdp_by_offset(in_bytes(JumpData::displacement_offset()), scratch); |
| bind (profile_continue); |
| } |
| } |
| |
| // Count a not-taken branch in the bytecodes. |
| void InterpreterMacroAssembler::profile_not_taken_branch(Register scratch1, Register scratch2) { |
| if (ProfileInterpreter) { |
| Label profile_continue; |
| |
| // If no method data exists, go to profile_continue. |
| test_method_data_pointer(profile_continue); |
| |
| // We are taking a branch. Increment the not taken count. |
| increment_mdp_data_at(in_bytes(BranchData::not_taken_offset()), scratch1, scratch2); |
| |
| // The method data pointer needs to be updated to correspond to the |
| // next bytecode. |
| update_mdp_by_constant(in_bytes(BranchData::branch_data_size())); |
| bind (profile_continue); |
| } |
| } |
| |
| // Count a non-virtual call in the bytecodes. |
| void InterpreterMacroAssembler::profile_call(Register scratch1, Register scratch2) { |
| if (ProfileInterpreter) { |
| Label profile_continue; |
| |
| // If no method data exists, go to profile_continue. |
| test_method_data_pointer(profile_continue); |
| |
| // We are making a call. Increment the count. |
| increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2); |
| |
| // The method data pointer needs to be updated to reflect the new target. |
| update_mdp_by_constant(in_bytes(CounterData::counter_data_size())); |
| bind (profile_continue); |
| } |
| } |
| |
| // Count a final call in the bytecodes. |
| void InterpreterMacroAssembler::profile_final_call(Register scratch1, Register scratch2) { |
| if (ProfileInterpreter) { |
| Label profile_continue; |
| |
| // If no method data exists, go to profile_continue. |
| test_method_data_pointer(profile_continue); |
| |
| // We are making a call. Increment the count. |
| increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2); |
| |
| // The method data pointer needs to be updated to reflect the new target. |
| update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size())); |
| bind (profile_continue); |
| } |
| } |
| |
| // Count a virtual call in the bytecodes. |
| void InterpreterMacroAssembler::profile_virtual_call(Register Rreceiver, |
| Register Rscratch1, |
| Register Rscratch2, |
| bool receiver_can_be_null) { |
| if (!ProfileInterpreter) { return; } |
| Label profile_continue; |
| |
| // If no method data exists, go to profile_continue. |
| test_method_data_pointer(profile_continue); |
| |
| Label skip_receiver_profile; |
| if (receiver_can_be_null) { |
| Label not_null; |
| cmpdi(CCR0, Rreceiver, 0); |
| bne(CCR0, not_null); |
| // We are making a call. Increment the count for null receiver. |
| increment_mdp_data_at(in_bytes(CounterData::count_offset()), Rscratch1, Rscratch2); |
| b(skip_receiver_profile); |
| bind(not_null); |
| } |
| |
| // Record the receiver type. |
| record_klass_in_profile(Rreceiver, Rscratch1, Rscratch2, true); |
| bind(skip_receiver_profile); |
| |
| // The method data pointer needs to be updated to reflect the new target. |
| update_mdp_by_constant(in_bytes(VirtualCallData::virtual_call_data_size())); |
| bind (profile_continue); |
| } |
| |
| void InterpreterMacroAssembler::profile_typecheck(Register Rklass, Register Rscratch1, Register Rscratch2) { |
| if (ProfileInterpreter) { |
| Label profile_continue; |
| |
| // If no method data exists, go to profile_continue. |
| test_method_data_pointer(profile_continue); |
| |
| int mdp_delta = in_bytes(BitData::bit_data_size()); |
| if (TypeProfileCasts) { |
| mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); |
| |
| // Record the object type. |
| record_klass_in_profile(Rklass, Rscratch1, Rscratch2, false); |
| } |
| |
| // The method data pointer needs to be updated. |
| update_mdp_by_constant(mdp_delta); |
| |
| bind (profile_continue); |
| } |
| } |
| |
| void InterpreterMacroAssembler::profile_typecheck_failed(Register Rscratch1, Register Rscratch2) { |
| if (ProfileInterpreter && TypeProfileCasts) { |
| Label profile_continue; |
| |
| // If no method data exists, go to profile_continue. |
| test_method_data_pointer(profile_continue); |
| |
| int count_offset = in_bytes(CounterData::count_offset()); |
| // Back up the address, since we have already bumped the mdp. |
| count_offset -= in_bytes(VirtualCallData::virtual_call_data_size()); |
| |
| // *Decrement* the counter. We expect to see zero or small negatives. |
| increment_mdp_data_at(count_offset, Rscratch1, Rscratch2, true); |
| |
| bind (profile_continue); |
| } |
| } |
| |
| // Count a ret in the bytecodes. |
| void InterpreterMacroAssembler::profile_ret(TosState state, Register return_bci, |
| Register scratch1, Register scratch2) { |
| if (ProfileInterpreter) { |
| Label profile_continue; |
| uint row; |
| |
| // If no method data exists, go to profile_continue. |
| test_method_data_pointer(profile_continue); |
| |
| // Update the total ret count. |
| increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2 ); |
| |
| for (row = 0; row < RetData::row_limit(); row++) { |
| Label next_test; |
| |
| // See if return_bci is equal to bci[n]: |
| test_mdp_data_at(in_bytes(RetData::bci_offset(row)), return_bci, next_test, scratch1); |
| |
| // return_bci is equal to bci[n]. Increment the count. |
| increment_mdp_data_at(in_bytes(RetData::bci_count_offset(row)), scratch1, scratch2); |
| |
| // The method data pointer needs to be updated to reflect the new target. |
| update_mdp_by_offset(in_bytes(RetData::bci_displacement_offset(row)), scratch1); |
| b(profile_continue); |
| bind(next_test); |
| } |
| |
| update_mdp_for_ret(state, return_bci); |
| |
| bind (profile_continue); |
| } |
| } |
| |
| // Count the default case of a switch construct. |
| void InterpreterMacroAssembler::profile_switch_default(Register scratch1, Register scratch2) { |
| if (ProfileInterpreter) { |
| Label profile_continue; |
| |
| // If no method data exists, go to profile_continue. |
| test_method_data_pointer(profile_continue); |
| |
| // Update the default case count |
| increment_mdp_data_at(in_bytes(MultiBranchData::default_count_offset()), |
| scratch1, scratch2); |
| |
| // The method data pointer needs to be updated. |
| update_mdp_by_offset(in_bytes(MultiBranchData::default_displacement_offset()), |
| scratch1); |
| |
| bind (profile_continue); |
| } |
| } |
| |
| // Count the index'th case of a switch construct. |
| void InterpreterMacroAssembler::profile_switch_case(Register index, |
| Register scratch1, |
| Register scratch2, |
| Register scratch3) { |
| if (ProfileInterpreter) { |
| assert_different_registers(index, scratch1, scratch2, scratch3); |
| Label profile_continue; |
| |
| // If no method data exists, go to profile_continue. |
| test_method_data_pointer(profile_continue); |
| |
| // Build the base (index * per_case_size_in_bytes()) + case_array_offset_in_bytes(). |
| li(scratch3, in_bytes(MultiBranchData::case_array_offset())); |
| |
| assert (in_bytes(MultiBranchData::per_case_size()) == 16, "so that shladd works"); |
| sldi(scratch1, index, exact_log2(in_bytes(MultiBranchData::per_case_size()))); |
| add(scratch1, scratch1, scratch3); |
| |
| // Update the case count. |
| increment_mdp_data_at(scratch1, in_bytes(MultiBranchData::relative_count_offset()), scratch2, scratch3); |
| |
| // The method data pointer needs to be updated. |
| update_mdp_by_offset(scratch1, in_bytes(MultiBranchData::relative_displacement_offset()), scratch2); |
| |
| bind (profile_continue); |
| } |
| } |
| |
| void InterpreterMacroAssembler::profile_null_seen(Register Rscratch1, Register Rscratch2) { |
| if (ProfileInterpreter) { |
| assert_different_registers(Rscratch1, Rscratch2); |
| Label profile_continue; |
| |
| // If no method data exists, go to profile_continue. |
| test_method_data_pointer(profile_continue); |
| |
| set_mdp_flag_at(BitData::null_seen_byte_constant(), Rscratch1); |
| |
| // The method data pointer needs to be updated. |
| int mdp_delta = in_bytes(BitData::bit_data_size()); |
| if (TypeProfileCasts) { |
| mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size()); |
| } |
| update_mdp_by_constant(mdp_delta); |
| |
| bind (profile_continue); |
| } |
| } |
| |
| void InterpreterMacroAssembler::record_klass_in_profile(Register Rreceiver, |
| Register Rscratch1, Register Rscratch2, |
| bool is_virtual_call) { |
| assert(ProfileInterpreter, "must be profiling"); |
| assert_different_registers(Rreceiver, Rscratch1, Rscratch2); |
| |
| Label done; |
| record_klass_in_profile_helper(Rreceiver, Rscratch1, Rscratch2, 0, done, is_virtual_call); |
| bind (done); |
| } |
| |
| void InterpreterMacroAssembler::record_klass_in_profile_helper( |
| Register receiver, Register scratch1, Register scratch2, |
| int start_row, Label& done, bool is_virtual_call) { |
| if (TypeProfileWidth == 0) { |
| if (is_virtual_call) { |
| increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2); |
| } |
| return; |
| } |
| |
| int last_row = VirtualCallData::row_limit() - 1; |
| assert(start_row <= last_row, "must be work left to do"); |
| // Test this row for both the receiver and for null. |
| // Take any of three different outcomes: |
| // 1. found receiver => increment count and goto done |
| // 2. found null => keep looking for case 1, maybe allocate this cell |
| // 3. found something else => keep looking for cases 1 and 2 |
| // Case 3 is handled by a recursive call. |
| for (int row = start_row; row <= last_row; row++) { |
| Label next_test; |
| bool test_for_null_also = (row == start_row); |
| |
| // See if the receiver is receiver[n]. |
| int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row)); |
| test_mdp_data_at(recvr_offset, receiver, next_test, scratch1); |
| // delayed()->tst(scratch); |
| |
| // The receiver is receiver[n]. Increment count[n]. |
| int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row)); |
| increment_mdp_data_at(count_offset, scratch1, scratch2); |
| b(done); |
| bind(next_test); |
| |
| if (test_for_null_also) { |
| Label found_null; |
| // Failed the equality check on receiver[n]... Test for null. |
| if (start_row == last_row) { |
| // The only thing left to do is handle the null case. |
| if (is_virtual_call) { |
| // Scratch1 contains test_out from test_mdp_data_at. |
| cmpdi(CCR0, scratch1, 0); |
| beq(CCR0, found_null); |
| // Receiver did not match any saved receiver and there is no empty row for it. |
| // Increment total counter to indicate polymorphic case. |
| increment_mdp_data_at(in_bytes(CounterData::count_offset()), scratch1, scratch2); |
| b(done); |
| bind(found_null); |
| } else { |
| cmpdi(CCR0, scratch1, 0); |
| bne(CCR0, done); |
| } |
| break; |
| } |
| // Since null is rare, make it be the branch-taken case. |
| cmpdi(CCR0, scratch1, 0); |
| beq(CCR0, found_null); |
| |
| // Put all the "Case 3" tests here. |
| record_klass_in_profile_helper(receiver, scratch1, scratch2, start_row + 1, done, is_virtual_call); |
| |
| // Found a null. Keep searching for a matching receiver, |
| // but remember that this is an empty (unused) slot. |
| bind(found_null); |
| } |
| } |
| |
| // In the fall-through case, we found no matching receiver, but we |
| // observed the receiver[start_row] is NULL. |
| |
| // Fill in the receiver field and increment the count. |
| int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row)); |
| set_mdp_data_at(recvr_offset, receiver); |
| int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row)); |
| li(scratch1, DataLayout::counter_increment); |
| set_mdp_data_at(count_offset, scratch1); |
| if (start_row > 0) { |
| b(done); |
| } |
| } |
| |
| // Argument and return type profilig. |
| // kills: tmp, tmp2, R0, CR0, CR1 |
| void InterpreterMacroAssembler::profile_obj_type(Register obj, Register mdo_addr_base, |
| RegisterOrConstant mdo_addr_offs, |
| Register tmp, Register tmp2) { |
| Label do_nothing, do_update; |
| |
| // tmp2 = obj is allowed |
| assert_different_registers(obj, mdo_addr_base, tmp, R0); |
| assert_different_registers(tmp2, mdo_addr_base, tmp, R0); |
| const Register klass = tmp2; |
| |
| verify_oop(obj); |
| |
| ld(tmp, mdo_addr_offs, mdo_addr_base); |
| |
| // Set null_seen if obj is 0. |
| cmpdi(CCR0, obj, 0); |
| ori(R0, tmp, TypeEntries::null_seen); |
| beq(CCR0, do_update); |
| |
| load_klass(klass, obj); |
| |
| clrrdi(R0, tmp, exact_log2(-TypeEntries::type_klass_mask)); |
| // Basically same as andi(R0, tmp, TypeEntries::type_klass_mask); |
| cmpd(CCR1, R0, klass); |
| // Klass seen before, nothing to do (regardless of unknown bit). |
| //beq(CCR1, do_nothing); |
| |
| andi_(R0, klass, TypeEntries::type_unknown); |
| // Already unknown. Nothing to do anymore. |
| //bne(CCR0, do_nothing); |
| crorc(CCR0, Assembler::equal, CCR1, Assembler::equal); // cr0 eq = cr1 eq or cr0 ne |
| beq(CCR0, do_nothing); |
| |
| clrrdi_(R0, tmp, exact_log2(-TypeEntries::type_mask)); |
| orr(R0, klass, tmp); // Combine klass and null_seen bit (only used if (tmp & type_mask)==0). |
| beq(CCR0, do_update); // First time here. Set profile type. |
| |
| // Different than before. Cannot keep accurate profile. |
| ori(R0, tmp, TypeEntries::type_unknown); |
| |
| bind(do_update); |
| // update profile |
| std(R0, mdo_addr_offs, mdo_addr_base); |
| |
| align(32, 12); |
| bind(do_nothing); |
| } |
| |
| void InterpreterMacroAssembler::profile_arguments_type(Register callee, |
| Register tmp1, Register tmp2, |
| bool is_virtual) { |
| if (!ProfileInterpreter) { |
| return; |
| } |
| |
| assert_different_registers(callee, tmp1, tmp2, R28_mdx); |
| |
| if (MethodData::profile_arguments() || MethodData::profile_return()) { |
| Label profile_continue; |
| |
| test_method_data_pointer(profile_continue); |
| |
| int off_to_start = is_virtual ? |
| in_bytes(VirtualCallData::virtual_call_data_size()) : in_bytes(CounterData::counter_data_size()); |
| |
| lbz(tmp1, in_bytes(DataLayout::tag_offset()) - off_to_start, R28_mdx); |
| cmpwi(CCR0, tmp1, is_virtual ? DataLayout::virtual_call_type_data_tag : DataLayout::call_type_data_tag); |
| bne(CCR0, profile_continue); |
| |
| if (MethodData::profile_arguments()) { |
| Label done; |
| int off_to_args = in_bytes(TypeEntriesAtCall::args_data_offset()); |
| add(R28_mdx, off_to_args, R28_mdx); |
| |
| for (int i = 0; i < TypeProfileArgsLimit; i++) { |
| if (i > 0 || MethodData::profile_return()) { |
| // If return value type is profiled we may have no argument to profile. |
| ld(tmp1, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args, R28_mdx); |
| cmpdi(CCR0, tmp1, (i+1)*TypeStackSlotEntries::per_arg_count()); |
| addi(tmp1, tmp1, -i*TypeStackSlotEntries::per_arg_count()); |
| blt(CCR0, done); |
| } |
| ld(tmp1, in_bytes(Method::const_offset()), callee); |
| lhz(tmp1, in_bytes(ConstMethod::size_of_parameters_offset()), tmp1); |
| // Stack offset o (zero based) from the start of the argument |
| // list, for n arguments translates into offset n - o - 1 from |
| // the end of the argument list. But there's an extra slot at |
| // the top of the stack. So the offset is n - o from Lesp. |
| ld(tmp2, in_bytes(TypeEntriesAtCall::stack_slot_offset(i))-off_to_args, R28_mdx); |
| subf(tmp1, tmp2, tmp1); |
| |
| sldi(tmp1, tmp1, Interpreter::logStackElementSize); |
| ldx(tmp1, tmp1, R15_esp); |
| |
| profile_obj_type(tmp1, R28_mdx, in_bytes(TypeEntriesAtCall::argument_type_offset(i))-off_to_args, tmp2, tmp1); |
| |
| int to_add = in_bytes(TypeStackSlotEntries::per_arg_size()); |
| addi(R28_mdx, R28_mdx, to_add); |
| off_to_args += to_add; |
| } |
| |
| if (MethodData::profile_return()) { |
| ld(tmp1, in_bytes(TypeEntriesAtCall::cell_count_offset())-off_to_args, R28_mdx); |
| addi(tmp1, tmp1, -TypeProfileArgsLimit*TypeStackSlotEntries::per_arg_count()); |
| } |
| |
| bind(done); |
| |
| if (MethodData::profile_return()) { |
| // We're right after the type profile for the last |
| // argument. tmp1 is the number of cells left in the |
| // CallTypeData/VirtualCallTypeData to reach its end. Non null |
| // if there's a return to profile. |
| assert(ReturnTypeEntry::static_cell_count() < TypeStackSlotEntries::per_arg_count(), |
| "can't move past ret type"); |
| sldi(tmp1, tmp1, exact_log2(DataLayout::cell_size)); |
| add(R28_mdx, tmp1, R28_mdx); |
| } |
| } else { |
| assert(MethodData::profile_return(), "either profile call args or call ret"); |
| update_mdp_by_constant(in_bytes(TypeEntriesAtCall::return_only_size())); |
| } |
| |
| // Mdp points right after the end of the |
| // CallTypeData/VirtualCallTypeData, right after the cells for the |
| // return value type if there's one. |
| align(32, 12); |
| bind(profile_continue); |
| } |
| } |
| |
| void InterpreterMacroAssembler::profile_return_type(Register ret, Register tmp1, Register tmp2) { |
| assert_different_registers(ret, tmp1, tmp2); |
| if (ProfileInterpreter && MethodData::profile_return()) { |
| Label profile_continue; |
| |
| test_method_data_pointer(profile_continue); |
| |
| if (MethodData::profile_return_jsr292_only()) { |
| // If we don't profile all invoke bytecodes we must make sure |
| // it's a bytecode we indeed profile. We can't go back to the |
| // begining of the ProfileData we intend to update to check its |
| // type because we're right after it and we don't known its |
| // length. |
| lbz(tmp1, 0, R14_bcp); |
| lbz(tmp2, Method::intrinsic_id_offset_in_bytes(), R19_method); |
| cmpwi(CCR0, tmp1, Bytecodes::_invokedynamic); |
| cmpwi(CCR1, tmp1, Bytecodes::_invokehandle); |
| cror(CCR0, Assembler::equal, CCR1, Assembler::equal); |
| cmpwi(CCR1, tmp2, vmIntrinsics::_compiledLambdaForm); |
| cror(CCR0, Assembler::equal, CCR1, Assembler::equal); |
| bne(CCR0, profile_continue); |
| } |
| |
| profile_obj_type(ret, R28_mdx, -in_bytes(ReturnTypeEntry::size()), tmp1, tmp2); |
| |
| align(32, 12); |
| bind(profile_continue); |
| } |
| } |
| |
| void InterpreterMacroAssembler::profile_parameters_type(Register tmp1, Register tmp2, |
| Register tmp3, Register tmp4) { |
| if (ProfileInterpreter && MethodData::profile_parameters()) { |
| Label profile_continue, done; |
| |
| test_method_data_pointer(profile_continue); |
| |
| // Load the offset of the area within the MDO used for |
| // parameters. If it's negative we're not profiling any parameters. |
| lwz(tmp1, in_bytes(MethodData::parameters_type_data_di_offset()) - in_bytes(MethodData::data_offset()), R28_mdx); |
| cmpwi(CCR0, tmp1, 0); |
| blt(CCR0, profile_continue); |
| |
| // Compute a pointer to the area for parameters from the offset |
| // and move the pointer to the slot for the last |
| // parameters. Collect profiling from last parameter down. |
| // mdo start + parameters offset + array length - 1 |
| |
| // Pointer to the parameter area in the MDO. |
| const Register mdp = tmp1; |
| add(mdp, tmp1, R28_mdx); |
| |
| // Offset of the current profile entry to update. |
| const Register entry_offset = tmp2; |
| // entry_offset = array len in number of cells |
| ld(entry_offset, in_bytes(ArrayData::array_len_offset()), mdp); |
| |
| int off_base = in_bytes(ParametersTypeData::stack_slot_offset(0)); |
| assert(off_base % DataLayout::cell_size == 0, "should be a number of cells"); |
| |
| // entry_offset (number of cells) = array len - size of 1 entry + offset of the stack slot field |
| addi(entry_offset, entry_offset, -TypeStackSlotEntries::per_arg_count() + (off_base / DataLayout::cell_size)); |
| // entry_offset in bytes |
| sldi(entry_offset, entry_offset, exact_log2(DataLayout::cell_size)); |
| |
| Label loop; |
| align(32, 12); |
| bind(loop); |
| |
| // Load offset on the stack from the slot for this parameter. |
| ld(tmp3, entry_offset, mdp); |
| sldi(tmp3, tmp3, Interpreter::logStackElementSize); |
| neg(tmp3, tmp3); |
| // Read the parameter from the local area. |
| ldx(tmp3, tmp3, R18_locals); |
| |
| // Make entry_offset now point to the type field for this parameter. |
| int type_base = in_bytes(ParametersTypeData::type_offset(0)); |
| assert(type_base > off_base, "unexpected"); |
| addi(entry_offset, entry_offset, type_base - off_base); |
| |
| // Profile the parameter. |
| profile_obj_type(tmp3, mdp, entry_offset, tmp4, tmp3); |
| |
| // Go to next parameter. |
| int delta = TypeStackSlotEntries::per_arg_count() * DataLayout::cell_size + (type_base - off_base); |
| cmpdi(CCR0, entry_offset, off_base + delta); |
| addi(entry_offset, entry_offset, -delta); |
| bge(CCR0, loop); |
| |
| align(32, 12); |
| bind(profile_continue); |
| } |
| } |
| |
| // Add a InterpMonitorElem to stack (see frame_sparc.hpp). |
| void InterpreterMacroAssembler::add_monitor_to_stack(bool stack_is_empty, Register Rtemp1, Register Rtemp2) { |
| |
| // Very-local scratch registers. |
| const Register esp = Rtemp1; |
| const Register slot = Rtemp2; |
| |
| // Extracted monitor_size. |
| int monitor_size = frame::interpreter_frame_monitor_size_in_bytes(); |
| assert(Assembler::is_aligned((unsigned int)monitor_size, |
| (unsigned int)frame::alignment_in_bytes), |
| "size of a monitor must respect alignment of SP"); |
| |
| resize_frame(-monitor_size, /*temp*/esp); // Allocate space for new monitor |
| std(R1_SP, _ijava_state_neg(top_frame_sp), esp); // esp contains fp |
| |
| // Shuffle expression stack down. Recall that stack_base points |
| // just above the new expression stack bottom. Old_tos and new_tos |
| // are used to scan thru the old and new expression stacks. |
| if (!stack_is_empty) { |
| Label copy_slot, copy_slot_finished; |
| const Register n_slots = slot; |
| |
| addi(esp, R15_esp, Interpreter::stackElementSize); // Point to first element (pre-pushed stack). |
| subf(n_slots, esp, R26_monitor); |
| srdi_(n_slots, n_slots, LogBytesPerWord); // Compute number of slots to copy. |
| assert(LogBytesPerWord == 3, "conflicts assembler instructions"); |
| beq(CCR0, copy_slot_finished); // Nothing to copy. |
| |
| mtctr(n_slots); |
| |
| // loop |
| bind(copy_slot); |
| ld(slot, 0, esp); // Move expression stack down. |
| std(slot, -monitor_size, esp); // distance = monitor_size |
| addi(esp, esp, BytesPerWord); |
| bdnz(copy_slot); |
| |
| bind(copy_slot_finished); |
| } |
| |
| addi(R15_esp, R15_esp, -monitor_size); |
| addi(R26_monitor, R26_monitor, -monitor_size); |
| |
| // Restart interpreter |
| } |
| |
| // ============================================================================ |
| // Java locals access |
| |
| // Load a local variable at index in Rindex into register Rdst_value. |
| // Also puts address of local into Rdst_address as a service. |
| // Kills: |
| // - Rdst_value |
| // - Rdst_address |
| void InterpreterMacroAssembler::load_local_int(Register Rdst_value, Register Rdst_address, Register Rindex) { |
| sldi(Rdst_address, Rindex, Interpreter::logStackElementSize); |
| subf(Rdst_address, Rdst_address, R18_locals); |
| lwz(Rdst_value, 0, Rdst_address); |
| } |
| |
| // Load a local variable at index in Rindex into register Rdst_value. |
| // Also puts address of local into Rdst_address as a service. |
| // Kills: |
| // - Rdst_value |
| // - Rdst_address |
| void InterpreterMacroAssembler::load_local_long(Register Rdst_value, Register Rdst_address, Register Rindex) { |
| sldi(Rdst_address, Rindex, Interpreter::logStackElementSize); |
| subf(Rdst_address, Rdst_address, R18_locals); |
| ld(Rdst_value, -8, Rdst_address); |
| } |
| |
| // Load a local variable at index in Rindex into register Rdst_value. |
| // Also puts address of local into Rdst_address as a service. |
| // Input: |
| // - Rindex: slot nr of local variable |
| // Kills: |
| // - Rdst_value |
| // - Rdst_address |
| void InterpreterMacroAssembler::load_local_ptr(Register Rdst_value, |
| Register Rdst_address, |
| Register Rindex) { |
| sldi(Rdst_address, Rindex, Interpreter::logStackElementSize); |
| subf(Rdst_address, Rdst_address, R18_locals); |
| ld(Rdst_value, 0, Rdst_address); |
| } |
| |
| // Load a local variable at index in Rindex into register Rdst_value. |
| // Also puts address of local into Rdst_address as a service. |
| // Kills: |
| // - Rdst_value |
| // - Rdst_address |
| void InterpreterMacroAssembler::load_local_float(FloatRegister Rdst_value, |
| Register Rdst_address, |
| Register Rindex) { |
| sldi(Rdst_address, Rindex, Interpreter::logStackElementSize); |
| subf(Rdst_address, Rdst_address, R18_locals); |
| lfs(Rdst_value, 0, Rdst_address); |
| } |
| |
| // Load a local variable at index in Rindex into register Rdst_value. |
| // Also puts address of local into Rdst_address as a service. |
| // Kills: |
| // - Rdst_value |
| // - Rdst_address |
| void InterpreterMacroAssembler::load_local_double(FloatRegister Rdst_value, |
| Register Rdst_address, |
| Register Rindex) { |
| sldi(Rdst_address, Rindex, Interpreter::logStackElementSize); |
| subf(Rdst_address, Rdst_address, R18_locals); |
| lfd(Rdst_value, -8, Rdst_address); |
| } |
| |
| // Store an int value at local variable slot Rindex. |
| // Kills: |
| // - Rindex |
| void InterpreterMacroAssembler::store_local_int(Register Rvalue, Register Rindex) { |
| sldi(Rindex, Rindex, Interpreter::logStackElementSize); |
| subf(Rindex, Rindex, R18_locals); |
| stw(Rvalue, 0, Rindex); |
| } |
| |
| // Store a long value at local variable slot Rindex. |
| // Kills: |
| // - Rindex |
| void InterpreterMacroAssembler::store_local_long(Register Rvalue, Register Rindex) { |
| sldi(Rindex, Rindex, Interpreter::logStackElementSize); |
| subf(Rindex, Rindex, R18_locals); |
| std(Rvalue, -8, Rindex); |
| } |
| |
| // Store an oop value at local variable slot Rindex. |
| // Kills: |
| // - Rindex |
| void InterpreterMacroAssembler::store_local_ptr(Register Rvalue, Register Rindex) { |
| sldi(Rindex, Rindex, Interpreter::logStackElementSize); |
| subf(Rindex, Rindex, R18_locals); |
| std(Rvalue, 0, Rindex); |
| } |
| |
| // Store an int value at local variable slot Rindex. |
| // Kills: |
| // - Rindex |
| void InterpreterMacroAssembler::store_local_float(FloatRegister Rvalue, Register Rindex) { |
| sldi(Rindex, Rindex, Interpreter::logStackElementSize); |
| subf(Rindex, Rindex, R18_locals); |
| stfs(Rvalue, 0, Rindex); |
| } |
| |
| // Store an int value at local variable slot Rindex. |
| // Kills: |
| // - Rindex |
| void InterpreterMacroAssembler::store_local_double(FloatRegister Rvalue, Register Rindex) { |
| sldi(Rindex, Rindex, Interpreter::logStackElementSize); |
| subf(Rindex, Rindex, R18_locals); |
| stfd(Rvalue, -8, Rindex); |
| } |
| |
| // Read pending exception from thread and jump to interpreter. |
| // Throw exception entry if one if pending. Fall through otherwise. |
| void InterpreterMacroAssembler::check_and_forward_exception(Register Rscratch1, Register Rscratch2) { |
| assert_different_registers(Rscratch1, Rscratch2, R3); |
| Register Rexception = Rscratch1; |
| Register Rtmp = Rscratch2; |
| Label Ldone; |
| // Get pending exception oop. |
| ld(Rexception, thread_(pending_exception)); |
| cmpdi(CCR0, Rexception, 0); |
| beq(CCR0, Ldone); |
| li(Rtmp, 0); |
| mr_if_needed(R3, Rexception); |
| std(Rtmp, thread_(pending_exception)); // Clear exception in thread |
| if (Interpreter::rethrow_exception_entry() != NULL) { |
| // Already got entry address. |
| load_dispatch_table(Rtmp, (address*)Interpreter::rethrow_exception_entry()); |
| } else { |
| // Dynamically load entry address. |
| int simm16_rest = load_const_optimized(Rtmp, &Interpreter::_rethrow_exception_entry, R0, true); |
| ld(Rtmp, simm16_rest, Rtmp); |
| } |
| mtctr(Rtmp); |
| save_interpreter_state(Rtmp); |
| bctr(); |
| |
| align(32, 12); |
| bind(Ldone); |
| } |
| |
| void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point, bool check_exceptions) { |
| save_interpreter_state(R11_scratch1); |
| |
| MacroAssembler::call_VM(oop_result, entry_point, false); |
| |
| restore_interpreter_state(R11_scratch1, /*bcp_and_mdx_only*/ true); |
| |
| check_and_handle_popframe(R11_scratch1); |
| check_and_handle_earlyret(R11_scratch1); |
| // Now check exceptions manually. |
| if (check_exceptions) { |
| check_and_forward_exception(R11_scratch1, R12_scratch2); |
| } |
| } |
| |
| void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point, |
| Register arg_1, bool check_exceptions) { |
| // ARG1 is reserved for the thread. |
| mr_if_needed(R4_ARG2, arg_1); |
| call_VM(oop_result, entry_point, check_exceptions); |
| } |
| |
| void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point, |
| Register arg_1, Register arg_2, |
| bool check_exceptions) { |
| // ARG1 is reserved for the thread. |
| mr_if_needed(R4_ARG2, arg_1); |
| assert(arg_2 != R4_ARG2, "smashed argument"); |
| mr_if_needed(R5_ARG3, arg_2); |
| call_VM(oop_result, entry_point, check_exceptions); |
| } |
| |
| void InterpreterMacroAssembler::call_VM(Register oop_result, address entry_point, |
| Register arg_1, Register arg_2, Register arg_3, |
| bool check_exceptions) { |
| // ARG1 is reserved for the thread. |
| mr_if_needed(R4_ARG2, arg_1); |
| assert(arg_2 != R4_ARG2, "smashed argument"); |
| mr_if_needed(R5_ARG3, arg_2); |
| assert(arg_3 != R4_ARG2 && arg_3 != R5_ARG3, "smashed argument"); |
| mr_if_needed(R6_ARG4, arg_3); |
| call_VM(oop_result, entry_point, check_exceptions); |
| } |
| |
| void InterpreterMacroAssembler::save_interpreter_state(Register scratch) { |
| ld(scratch, 0, R1_SP); |
| std(R15_esp, _ijava_state_neg(esp), scratch); |
| std(R14_bcp, _ijava_state_neg(bcp), scratch); |
| std(R26_monitor, _ijava_state_neg(monitors), scratch); |
| if (ProfileInterpreter) { std(R28_mdx, _ijava_state_neg(mdx), scratch); } |
| // Other entries should be unchanged. |
| } |
| |
| void InterpreterMacroAssembler::restore_interpreter_state(Register scratch, bool bcp_and_mdx_only) { |
| ld(scratch, 0, R1_SP); |
| ld(R14_bcp, _ijava_state_neg(bcp), scratch); // Changed by VM code (exception). |
| if (ProfileInterpreter) { ld(R28_mdx, _ijava_state_neg(mdx), scratch); } // Changed by VM code. |
| if (!bcp_and_mdx_only) { |
| // Following ones are Metadata. |
| ld(R19_method, _ijava_state_neg(method), scratch); |
| ld(R27_constPoolCache, _ijava_state_neg(cpoolCache), scratch); |
| // Following ones are stack addresses and don't require reload. |
| ld(R15_esp, _ijava_state_neg(esp), scratch); |
| ld(R18_locals, _ijava_state_neg(locals), scratch); |
| ld(R26_monitor, _ijava_state_neg(monitors), scratch); |
| } |
| #ifdef ASSERT |
| { |
| Label Lok; |
| subf(R0, R1_SP, scratch); |
| cmpdi(CCR0, R0, frame::abi_reg_args_size + frame::ijava_state_size); |
| bge(CCR0, Lok); |
| stop("frame too small (restore istate)", 0x5432); |
| bind(Lok); |
| } |
| { |
| Label Lok; |
| ld(R0, _ijava_state_neg(ijava_reserved), scratch); |
| cmpdi(CCR0, R0, 0x5afe); |
| beq(CCR0, Lok); |
| stop("frame corrupted (restore istate)", 0x5afe); |
| bind(Lok); |
| } |
| #endif |
| } |
| |
| void InterpreterMacroAssembler::get_method_counters(Register method, |
| Register Rcounters, |
| Label& skip) { |
| BLOCK_COMMENT("Load and ev. allocate counter object {"); |
| Label has_counters; |
| ld(Rcounters, in_bytes(Method::method_counters_offset()), method); |
| cmpdi(CCR0, Rcounters, 0); |
| bne(CCR0, has_counters); |
| call_VM(noreg, CAST_FROM_FN_PTR(address, |
| InterpreterRuntime::build_method_counters), method, false); |
| ld(Rcounters, in_bytes(Method::method_counters_offset()), method); |
| cmpdi(CCR0, Rcounters, 0); |
| beq(CCR0, skip); // No MethodCounters, OutOfMemory. |
| BLOCK_COMMENT("} Load and ev. allocate counter object"); |
| |
| bind(has_counters); |
| } |
| |
| void InterpreterMacroAssembler::increment_invocation_counter(Register Rcounters, |
| Register iv_be_count, |
| Register Rtmp_r0) { |
| assert(UseCompiler || LogTouchedMethods, "incrementing must be useful"); |
| Register invocation_count = iv_be_count; |
| Register backedge_count = Rtmp_r0; |
| int delta = InvocationCounter::count_increment; |
| |
| // Load each counter in a register. |
| // ld(inv_counter, Rtmp); |
| // ld(be_counter, Rtmp2); |
| int inv_counter_offset = in_bytes(MethodCounters::invocation_counter_offset() + |
| InvocationCounter::counter_offset()); |
| int be_counter_offset = in_bytes(MethodCounters::backedge_counter_offset() + |
| InvocationCounter::counter_offset()); |
| |
| BLOCK_COMMENT("Increment profiling counters {"); |
| |
| // Load the backedge counter. |
| lwz(backedge_count, be_counter_offset, Rcounters); // is unsigned int |
| // Mask the backedge counter. |
| andi(backedge_count, backedge_count, InvocationCounter::count_mask_value); |
| |
| // Load the invocation counter. |
| lwz(invocation_count, inv_counter_offset, Rcounters); // is unsigned int |
| // Add the delta to the invocation counter and store the result. |
| addi(invocation_count, invocation_count, delta); |
| // Store value. |
| stw(invocation_count, inv_counter_offset, Rcounters); |
| |
| // Add invocation counter + backedge counter. |
| add(iv_be_count, backedge_count, invocation_count); |
| |
| // Note that this macro must leave the backedge_count + invocation_count in |
| // register iv_be_count! |
| BLOCK_COMMENT("} Increment profiling counters"); |
| } |
| |
| void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) { |
| if (state == atos) { MacroAssembler::verify_oop(reg); } |
| } |
| |
| // Local helper function for the verify_oop_or_return_address macro. |
| static bool verify_return_address(Method* m, int bci) { |
| #ifndef PRODUCT |
| address pc = (address)(m->constMethod()) + in_bytes(ConstMethod::codes_offset()) + bci; |
| // Assume it is a valid return address if it is inside m and is preceded by a jsr. |
| if (!m->contains(pc)) return false; |
| address jsr_pc; |
| jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr); |
| if (*jsr_pc == Bytecodes::_jsr && jsr_pc >= m->code_base()) return true; |
| jsr_pc = pc - Bytecodes::length_for(Bytecodes::_jsr_w); |
| if (*jsr_pc == Bytecodes::_jsr_w && jsr_pc >= m->code_base()) return true; |
| #endif // PRODUCT |
| return false; |
| } |
| |
| void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) { |
| if (VerifyFPU) { |
| unimplemented("verfiyFPU"); |
| } |
| } |
| |
| void InterpreterMacroAssembler::verify_oop_or_return_address(Register reg, Register Rtmp) { |
| if (!VerifyOops) return; |
| |
| // The VM documentation for the astore[_wide] bytecode allows |
| // the TOS to be not only an oop but also a return address. |
| Label test; |
| Label skip; |
| // See if it is an address (in the current method): |
| |
| const int log2_bytecode_size_limit = 16; |
| srdi_(Rtmp, reg, log2_bytecode_size_limit); |
| bne(CCR0, test); |
| |
| address fd = CAST_FROM_FN_PTR(address, verify_return_address); |
| const int nbytes_save = MacroAssembler::num_volatile_regs * 8; |
| save_volatile_gprs(R1_SP, -nbytes_save); // except R0 |
| save_LR_CR(Rtmp); // Save in old frame. |
| push_frame_reg_args(nbytes_save, Rtmp); |
| |
| load_const_optimized(Rtmp, fd, R0); |
| mr_if_needed(R4_ARG2, reg); |
| mr(R3_ARG1, R19_method); |
| call_c(Rtmp); // call C |
| |
| pop_frame(); |
| restore_LR_CR(Rtmp); |
| restore_volatile_gprs(R1_SP, -nbytes_save); // except R0 |
| b(skip); |
| |
| // Perform a more elaborate out-of-line call. |
| // Not an address; verify it: |
| bind(test); |
| verify_oop(reg); |
| bind(skip); |
| } |
| |
| // Inline assembly for: |
| // |
| // if (thread is in interp_only_mode) { |
| // InterpreterRuntime::post_method_entry(); |
| // } |
| // if (*jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_ENTRY ) || |
| // *jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_ENTRY2) ) { |
| // SharedRuntime::jvmpi_method_entry(method, receiver); |
| // } |
| void InterpreterMacroAssembler::notify_method_entry() { |
| // JVMTI |
| // Whenever JVMTI puts a thread in interp_only_mode, method |
| // entry/exit events are sent for that thread to track stack |
| // depth. If it is possible to enter interp_only_mode we add |
| // the code to check if the event should be sent. |
| if (JvmtiExport::can_post_interpreter_events()) { |
| Label jvmti_post_done; |
| |
| lwz(R0, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread); |
| cmpwi(CCR0, R0, 0); |
| beq(CCR0, jvmti_post_done); |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_entry), |
| /*check_exceptions=*/true); |
| |
| bind(jvmti_post_done); |
| } |
| } |
| |
| // Inline assembly for: |
| // |
| // if (thread is in interp_only_mode) { |
| // // save result |
| // InterpreterRuntime::post_method_exit(); |
| // // restore result |
| // } |
| // if (*jvmpi::event_flags_array_at_addr(JVMPI_EVENT_METHOD_EXIT)) { |
| // // save result |
| // SharedRuntime::jvmpi_method_exit(); |
| // // restore result |
| // } |
| // |
| // Native methods have their result stored in d_tmp and l_tmp. |
| // Java methods have their result stored in the expression stack. |
| void InterpreterMacroAssembler::notify_method_exit(bool is_native_method, TosState state, |
| NotifyMethodExitMode mode, bool check_exceptions) { |
| // JVMTI |
| // Whenever JVMTI puts a thread in interp_only_mode, method |
| // entry/exit events are sent for that thread to track stack |
| // depth. If it is possible to enter interp_only_mode we add |
| // the code to check if the event should be sent. |
| if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) { |
| Label jvmti_post_done; |
| |
| lwz(R0, in_bytes(JavaThread::interp_only_mode_offset()), R16_thread); |
| cmpwi(CCR0, R0, 0); |
| beq(CCR0, jvmti_post_done); |
| if (!is_native_method) { push(state); } // Expose tos to GC. |
| call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit), |
| /*check_exceptions=*/check_exceptions); |
| if (!is_native_method) { pop(state); } |
| |
| align(32, 12); |
| bind(jvmti_post_done); |
| } |
| |
| // Dtrace support not implemented. |
| } |
| |