| /* |
| * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #ifndef _WINDOWS |
| #include "alloca.h" |
| #endif |
| #include "asm/macroAssembler.hpp" |
| #include "asm/macroAssembler.inline.hpp" |
| #include "code/debugInfoRec.hpp" |
| #include "code/icBuffer.hpp" |
| #include "code/vtableStubs.hpp" |
| #include "interpreter/interpreter.hpp" |
| #include "oops/compiledICHolder.hpp" |
| #include "prims/jvmtiRedefineClassesTrace.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #include "runtime/vframeArray.hpp" |
| #include "vmreg_x86.inline.hpp" |
| #ifdef COMPILER1 |
| #include "c1/c1_Runtime1.hpp" |
| #endif |
| #ifdef COMPILER2 |
| #include "opto/runtime.hpp" |
| #endif |
| #if INCLUDE_JVMCI |
| #include "jvmci/jvmciJavaClasses.hpp" |
| #endif |
| |
| #define __ masm-> |
| |
| const int StackAlignmentInSlots = StackAlignmentInBytes / VMRegImpl::stack_slot_size; |
| |
| class SimpleRuntimeFrame { |
| |
| public: |
| |
| // Most of the runtime stubs have this simple frame layout. |
| // This class exists to make the layout shared in one place. |
| // Offsets are for compiler stack slots, which are jints. |
| enum layout { |
| // The frame sender code expects that rbp will be in the "natural" place and |
| // will override any oopMap setting for it. We must therefore force the layout |
| // so that it agrees with the frame sender code. |
| rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt, |
| rbp_off2, |
| return_off, return_off2, |
| framesize |
| }; |
| }; |
| |
| class RegisterSaver { |
| // Capture info about frame layout. Layout offsets are in jint |
| // units because compiler frame slots are jints. |
| #define XSAVE_AREA_BEGIN 160 |
| #define XSAVE_AREA_YMM_BEGIN 576 |
| #define XSAVE_AREA_ZMM_BEGIN 1152 |
| #define XSAVE_AREA_UPPERBANK 1664 |
| #define DEF_XMM_OFFS(regnum) xmm ## regnum ## _off = xmm_off + (regnum)*16/BytesPerInt, xmm ## regnum ## H_off |
| #define DEF_YMM_OFFS(regnum) ymm ## regnum ## _off = ymm_off + (regnum)*16/BytesPerInt, ymm ## regnum ## H_off |
| #define DEF_ZMM_OFFS(regnum) zmm ## regnum ## _off = zmm_off + (regnum-16)*64/BytesPerInt, zmm ## regnum ## H_off |
| enum layout { |
| fpu_state_off = frame::arg_reg_save_area_bytes/BytesPerInt, // fxsave save area |
| xmm_off = fpu_state_off + XSAVE_AREA_BEGIN/BytesPerInt, // offset in fxsave save area |
| DEF_XMM_OFFS(0), |
| DEF_XMM_OFFS(1), |
| // 2..15 are implied in range usage |
| ymm_off = xmm_off + (XSAVE_AREA_YMM_BEGIN - XSAVE_AREA_BEGIN)/BytesPerInt, |
| DEF_YMM_OFFS(0), |
| DEF_YMM_OFFS(1), |
| // 2..15 are implied in range usage |
| zmm_high = xmm_off + (XSAVE_AREA_ZMM_BEGIN - XSAVE_AREA_BEGIN)/BytesPerInt, |
| zmm_off = xmm_off + (XSAVE_AREA_UPPERBANK - XSAVE_AREA_BEGIN)/BytesPerInt, |
| DEF_ZMM_OFFS(16), |
| DEF_ZMM_OFFS(17), |
| // 18..31 are implied in range usage |
| fpu_state_end = fpu_state_off + ((FPUStateSizeInWords-1)*wordSize / BytesPerInt), |
| fpu_stateH_end, |
| r15_off, r15H_off, |
| r14_off, r14H_off, |
| r13_off, r13H_off, |
| r12_off, r12H_off, |
| r11_off, r11H_off, |
| r10_off, r10H_off, |
| r9_off, r9H_off, |
| r8_off, r8H_off, |
| rdi_off, rdiH_off, |
| rsi_off, rsiH_off, |
| ignore_off, ignoreH_off, // extra copy of rbp |
| rsp_off, rspH_off, |
| rbx_off, rbxH_off, |
| rdx_off, rdxH_off, |
| rcx_off, rcxH_off, |
| rax_off, raxH_off, |
| // 16-byte stack alignment fill word: see MacroAssembler::push/pop_IU_state |
| align_off, alignH_off, |
| flags_off, flagsH_off, |
| // The frame sender code expects that rbp will be in the "natural" place and |
| // will override any oopMap setting for it. We must therefore force the layout |
| // so that it agrees with the frame sender code. |
| rbp_off, rbpH_off, // copy of rbp we will restore |
| return_off, returnH_off, // slot for return address |
| reg_save_size // size in compiler stack slots |
| }; |
| |
| public: |
| static OopMap* save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words, bool save_vectors = false); |
| static void restore_live_registers(MacroAssembler* masm, bool restore_vectors = false); |
| |
| // Offsets into the register save area |
| // Used by deoptimization when it is managing result register |
| // values on its own |
| |
| static int rax_offset_in_bytes(void) { return BytesPerInt * rax_off; } |
| static int rdx_offset_in_bytes(void) { return BytesPerInt * rdx_off; } |
| static int rbx_offset_in_bytes(void) { return BytesPerInt * rbx_off; } |
| static int xmm0_offset_in_bytes(void) { return BytesPerInt * xmm0_off; } |
| static int return_offset_in_bytes(void) { return BytesPerInt * return_off; } |
| |
| // During deoptimization only the result registers need to be restored, |
| // all the other values have already been extracted. |
| static void restore_result_registers(MacroAssembler* masm); |
| }; |
| |
| OopMap* RegisterSaver::save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words, bool save_vectors) { |
| int off = 0; |
| int num_xmm_regs = XMMRegisterImpl::number_of_registers; |
| if (UseAVX < 3) { |
| num_xmm_regs = num_xmm_regs/2; |
| } |
| #if defined(COMPILER2) || INCLUDE_JVMCI |
| if (save_vectors) { |
| assert(UseAVX > 0, "up to 512bit vectors are supported with EVEX"); |
| assert(MaxVectorSize <= 64, "up to 512bit vectors are supported now"); |
| } |
| #else |
| assert(!save_vectors, "vectors are generated only by C2 and JVMCI"); |
| #endif |
| |
| // Always make the frame size 16-byte aligned, both vector and non vector stacks are always allocated |
| int frame_size_in_bytes = round_to(reg_save_size*BytesPerInt, num_xmm_regs); |
| // OopMap frame size is in compiler stack slots (jint's) not bytes or words |
| int frame_size_in_slots = frame_size_in_bytes / BytesPerInt; |
| // CodeBlob frame size is in words. |
| int frame_size_in_words = frame_size_in_bytes / wordSize; |
| *total_frame_words = frame_size_in_words; |
| |
| // Save registers, fpu state, and flags. |
| // We assume caller has already pushed the return address onto the |
| // stack, so rsp is 8-byte aligned here. |
| // We push rpb twice in this sequence because we want the real rbp |
| // to be under the return like a normal enter. |
| |
| __ enter(); // rsp becomes 16-byte aligned here |
| __ push_CPU_state(); // Push a multiple of 16 bytes |
| |
| // push cpu state handles this on EVEX enabled targets |
| if (save_vectors) { |
| // Save upper half of YMM registers(0..15) |
| int base_addr = XSAVE_AREA_YMM_BEGIN; |
| for (int n = 0; n < 16; n++) { |
| __ vextractf128_high(Address(rsp, base_addr+n*16), as_XMMRegister(n)); |
| } |
| if (VM_Version::supports_evex()) { |
| // Save upper half of ZMM registers(0..15) |
| base_addr = XSAVE_AREA_ZMM_BEGIN; |
| for (int n = 0; n < 16; n++) { |
| __ vextractf64x4_high(Address(rsp, base_addr+n*32), as_XMMRegister(n)); |
| } |
| // Save full ZMM registers(16..num_xmm_regs) |
| base_addr = XSAVE_AREA_UPPERBANK; |
| off = 0; |
| int vector_len = Assembler::AVX_512bit; |
| for (int n = 16; n < num_xmm_regs; n++) { |
| __ evmovdqul(Address(rsp, base_addr+(off++*64)), as_XMMRegister(n), vector_len); |
| } |
| } |
| } else { |
| if (VM_Version::supports_evex()) { |
| // Save upper bank of ZMM registers(16..31) for double/float usage |
| int base_addr = XSAVE_AREA_UPPERBANK; |
| off = 0; |
| for (int n = 16; n < num_xmm_regs; n++) { |
| __ movsd(Address(rsp, base_addr+(off++*64)), as_XMMRegister(n)); |
| } |
| } |
| } |
| if (frame::arg_reg_save_area_bytes != 0) { |
| // Allocate argument register save area |
| __ subptr(rsp, frame::arg_reg_save_area_bytes); |
| } |
| |
| // Set an oopmap for the call site. This oopmap will map all |
| // oop-registers and debug-info registers as callee-saved. This |
| // will allow deoptimization at this safepoint to find all possible |
| // debug-info recordings, as well as let GC find all oops. |
| |
| OopMapSet *oop_maps = new OopMapSet(); |
| OopMap* map = new OopMap(frame_size_in_slots, 0); |
| |
| #define STACK_OFFSET(x) VMRegImpl::stack2reg((x)) |
| |
| map->set_callee_saved(STACK_OFFSET( rax_off ), rax->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( rcx_off ), rcx->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( rdx_off ), rdx->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( rbx_off ), rbx->as_VMReg()); |
| // rbp location is known implicitly by the frame sender code, needs no oopmap |
| // and the location where rbp was saved by is ignored |
| map->set_callee_saved(STACK_OFFSET( rsi_off ), rsi->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( rdi_off ), rdi->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( r8_off ), r8->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( r9_off ), r9->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( r10_off ), r10->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( r11_off ), r11->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( r12_off ), r12->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( r13_off ), r13->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( r14_off ), r14->as_VMReg()); |
| map->set_callee_saved(STACK_OFFSET( r15_off ), r15->as_VMReg()); |
| // For both AVX and EVEX we will use the legacy FXSAVE area for xmm0..xmm15, |
| // on EVEX enabled targets, we get it included in the xsave area |
| off = xmm0_off; |
| int delta = xmm1_off - off; |
| for (int n = 0; n < 16; n++) { |
| XMMRegister xmm_name = as_XMMRegister(n); |
| map->set_callee_saved(STACK_OFFSET(off), xmm_name->as_VMReg()); |
| off += delta; |
| } |
| if(UseAVX > 2) { |
| // Obtain xmm16..xmm31 from the XSAVE area on EVEX enabled targets |
| off = zmm16_off; |
| delta = zmm17_off - off; |
| for (int n = 16; n < num_xmm_regs; n++) { |
| XMMRegister zmm_name = as_XMMRegister(n); |
| map->set_callee_saved(STACK_OFFSET(off), zmm_name->as_VMReg()); |
| off += delta; |
| } |
| } |
| |
| #if defined(COMPILER2) || INCLUDE_JVMCI |
| if (save_vectors) { |
| off = ymm0_off; |
| int delta = ymm1_off - off; |
| for (int n = 0; n < 16; n++) { |
| XMMRegister ymm_name = as_XMMRegister(n); |
| map->set_callee_saved(STACK_OFFSET(off), ymm_name->as_VMReg()->next(4)); |
| off += delta; |
| } |
| } |
| #endif // COMPILER2 || INCLUDE_JVMCI |
| |
| // %%% These should all be a waste but we'll keep things as they were for now |
| if (true) { |
| map->set_callee_saved(STACK_OFFSET( raxH_off ), rax->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( rcxH_off ), rcx->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( rdxH_off ), rdx->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( rbxH_off ), rbx->as_VMReg()->next()); |
| // rbp location is known implicitly by the frame sender code, needs no oopmap |
| map->set_callee_saved(STACK_OFFSET( rsiH_off ), rsi->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( rdiH_off ), rdi->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( r8H_off ), r8->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( r9H_off ), r9->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( r10H_off ), r10->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( r11H_off ), r11->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( r12H_off ), r12->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( r13H_off ), r13->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( r14H_off ), r14->as_VMReg()->next()); |
| map->set_callee_saved(STACK_OFFSET( r15H_off ), r15->as_VMReg()->next()); |
| // For both AVX and EVEX we will use the legacy FXSAVE area for xmm0..xmm15, |
| // on EVEX enabled targets, we get it included in the xsave area |
| off = xmm0H_off; |
| delta = xmm1H_off - off; |
| for (int n = 0; n < 16; n++) { |
| XMMRegister xmm_name = as_XMMRegister(n); |
| map->set_callee_saved(STACK_OFFSET(off), xmm_name->as_VMReg()->next()); |
| off += delta; |
| } |
| if (UseAVX > 2) { |
| // Obtain xmm16..xmm31 from the XSAVE area on EVEX enabled targets |
| off = zmm16H_off; |
| delta = zmm17H_off - off; |
| for (int n = 16; n < num_xmm_regs; n++) { |
| XMMRegister zmm_name = as_XMMRegister(n); |
| map->set_callee_saved(STACK_OFFSET(off), zmm_name->as_VMReg()->next()); |
| off += delta; |
| } |
| } |
| } |
| |
| return map; |
| } |
| |
| void RegisterSaver::restore_live_registers(MacroAssembler* masm, bool restore_vectors) { |
| int num_xmm_regs = XMMRegisterImpl::number_of_registers; |
| if (UseAVX < 3) { |
| num_xmm_regs = num_xmm_regs/2; |
| } |
| if (frame::arg_reg_save_area_bytes != 0) { |
| // Pop arg register save area |
| __ addptr(rsp, frame::arg_reg_save_area_bytes); |
| } |
| |
| #if defined(COMPILER2) || INCLUDE_JVMCI |
| if (restore_vectors) { |
| assert(UseAVX > 0, "up to 512bit vectors are supported with EVEX"); |
| assert(MaxVectorSize <= 64, "up to 512bit vectors are supported now"); |
| } |
| #else |
| assert(!restore_vectors, "vectors are generated only by C2"); |
| #endif |
| |
| // On EVEX enabled targets everything is handled in pop fpu state |
| if (restore_vectors) { |
| // Restore upper half of YMM registers (0..15) |
| int base_addr = XSAVE_AREA_YMM_BEGIN; |
| for (int n = 0; n < 16; n++) { |
| __ vinsertf128_high(as_XMMRegister(n), Address(rsp, base_addr+n*16)); |
| } |
| if (VM_Version::supports_evex()) { |
| // Restore upper half of ZMM registers (0..15) |
| base_addr = XSAVE_AREA_ZMM_BEGIN; |
| for (int n = 0; n < 16; n++) { |
| __ vinsertf64x4_high(as_XMMRegister(n), Address(rsp, base_addr+n*32)); |
| } |
| // Restore full ZMM registers(16..num_xmm_regs) |
| base_addr = XSAVE_AREA_UPPERBANK; |
| int vector_len = Assembler::AVX_512bit; |
| int off = 0; |
| for (int n = 16; n < num_xmm_regs; n++) { |
| __ evmovdqul(as_XMMRegister(n), Address(rsp, base_addr+(off++*64)), vector_len); |
| } |
| } |
| } else { |
| if (VM_Version::supports_evex()) { |
| // Restore upper bank of ZMM registers(16..31) for double/float usage |
| int base_addr = XSAVE_AREA_UPPERBANK; |
| int off = 0; |
| for (int n = 16; n < num_xmm_regs; n++) { |
| __ movsd(as_XMMRegister(n), Address(rsp, base_addr+(off++*64))); |
| } |
| } |
| } |
| |
| // Recover CPU state |
| __ pop_CPU_state(); |
| // Get the rbp described implicitly by the calling convention (no oopMap) |
| __ pop(rbp); |
| } |
| |
| void RegisterSaver::restore_result_registers(MacroAssembler* masm) { |
| |
| // Just restore result register. Only used by deoptimization. By |
| // now any callee save register that needs to be restored to a c2 |
| // caller of the deoptee has been extracted into the vframeArray |
| // and will be stuffed into the c2i adapter we create for later |
| // restoration so only result registers need to be restored here. |
| |
| // Restore fp result register |
| __ movdbl(xmm0, Address(rsp, xmm0_offset_in_bytes())); |
| // Restore integer result register |
| __ movptr(rax, Address(rsp, rax_offset_in_bytes())); |
| __ movptr(rdx, Address(rsp, rdx_offset_in_bytes())); |
| |
| // Pop all of the register save are off the stack except the return address |
| __ addptr(rsp, return_offset_in_bytes()); |
| } |
| |
| // Is vector's size (in bytes) bigger than a size saved by default? |
| // 16 bytes XMM registers are saved by default using fxsave/fxrstor instructions. |
| bool SharedRuntime::is_wide_vector(int size) { |
| return size > 16; |
| } |
| |
| // The java_calling_convention describes stack locations as ideal slots on |
| // a frame with no abi restrictions. Since we must observe abi restrictions |
| // (like the placement of the register window) the slots must be biased by |
| // the following value. |
| static int reg2offset_in(VMReg r) { |
| // Account for saved rbp and return address |
| // This should really be in_preserve_stack_slots |
| return (r->reg2stack() + 4) * VMRegImpl::stack_slot_size; |
| } |
| |
| static int reg2offset_out(VMReg r) { |
| return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size; |
| } |
| |
| // --------------------------------------------------------------------------- |
| // Read the array of BasicTypes from a signature, and compute where the |
| // arguments should go. Values in the VMRegPair regs array refer to 4-byte |
| // quantities. Values less than VMRegImpl::stack0 are registers, those above |
| // refer to 4-byte stack slots. All stack slots are based off of the stack pointer |
| // as framesizes are fixed. |
| // VMRegImpl::stack0 refers to the first slot 0(sp). |
| // and VMRegImpl::stack0+1 refers to the memory word 4-byes higher. Register |
| // up to RegisterImpl::number_of_registers) are the 64-bit |
| // integer registers. |
| |
| // Note: the INPUTS in sig_bt are in units of Java argument words, which are |
| // either 32-bit or 64-bit depending on the build. The OUTPUTS are in 32-bit |
| // units regardless of build. Of course for i486 there is no 64 bit build |
| |
| // The Java calling convention is a "shifted" version of the C ABI. |
| // By skipping the first C ABI register we can call non-static jni methods |
| // with small numbers of arguments without having to shuffle the arguments |
| // at all. Since we control the java ABI we ought to at least get some |
| // advantage out of it. |
| |
| int SharedRuntime::java_calling_convention(const BasicType *sig_bt, |
| VMRegPair *regs, |
| int total_args_passed, |
| int is_outgoing) { |
| |
| // Create the mapping between argument positions and |
| // registers. |
| static const Register INT_ArgReg[Argument::n_int_register_parameters_j] = { |
| j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5 |
| }; |
| static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_j] = { |
| j_farg0, j_farg1, j_farg2, j_farg3, |
| j_farg4, j_farg5, j_farg6, j_farg7 |
| }; |
| |
| |
| uint int_args = 0; |
| uint fp_args = 0; |
| uint stk_args = 0; // inc by 2 each time |
| |
| for (int i = 0; i < total_args_passed; i++) { |
| switch (sig_bt[i]) { |
| case T_BOOLEAN: |
| case T_CHAR: |
| case T_BYTE: |
| case T_SHORT: |
| case T_INT: |
| if (int_args < Argument::n_int_register_parameters_j) { |
| regs[i].set1(INT_ArgReg[int_args++]->as_VMReg()); |
| } else { |
| regs[i].set1(VMRegImpl::stack2reg(stk_args)); |
| stk_args += 2; |
| } |
| break; |
| case T_VOID: |
| // halves of T_LONG or T_DOUBLE |
| assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half"); |
| regs[i].set_bad(); |
| break; |
| case T_LONG: |
| assert(sig_bt[i + 1] == T_VOID, "expecting half"); |
| // fall through |
| case T_OBJECT: |
| case T_ARRAY: |
| case T_ADDRESS: |
| if (int_args < Argument::n_int_register_parameters_j) { |
| regs[i].set2(INT_ArgReg[int_args++]->as_VMReg()); |
| } else { |
| regs[i].set2(VMRegImpl::stack2reg(stk_args)); |
| stk_args += 2; |
| } |
| break; |
| case T_FLOAT: |
| if (fp_args < Argument::n_float_register_parameters_j) { |
| regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg()); |
| } else { |
| regs[i].set1(VMRegImpl::stack2reg(stk_args)); |
| stk_args += 2; |
| } |
| break; |
| case T_DOUBLE: |
| assert(sig_bt[i + 1] == T_VOID, "expecting half"); |
| if (fp_args < Argument::n_float_register_parameters_j) { |
| regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg()); |
| } else { |
| regs[i].set2(VMRegImpl::stack2reg(stk_args)); |
| stk_args += 2; |
| } |
| break; |
| default: |
| ShouldNotReachHere(); |
| break; |
| } |
| } |
| |
| return round_to(stk_args, 2); |
| } |
| |
| // Patch the callers callsite with entry to compiled code if it exists. |
| static void patch_callers_callsite(MacroAssembler *masm) { |
| Label L; |
| __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD); |
| __ jcc(Assembler::equal, L); |
| |
| // Save the current stack pointer |
| __ mov(r13, rsp); |
| // Schedule the branch target address early. |
| // Call into the VM to patch the caller, then jump to compiled callee |
| // rax isn't live so capture return address while we easily can |
| __ movptr(rax, Address(rsp, 0)); |
| |
| // align stack so push_CPU_state doesn't fault |
| __ andptr(rsp, -(StackAlignmentInBytes)); |
| __ push_CPU_state(); |
| |
| // VM needs caller's callsite |
| // VM needs target method |
| // This needs to be a long call since we will relocate this adapter to |
| // the codeBuffer and it may not reach |
| |
| // Allocate argument register save area |
| if (frame::arg_reg_save_area_bytes != 0) { |
| __ subptr(rsp, frame::arg_reg_save_area_bytes); |
| } |
| __ mov(c_rarg0, rbx); |
| __ mov(c_rarg1, rax); |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite))); |
| |
| // De-allocate argument register save area |
| if (frame::arg_reg_save_area_bytes != 0) { |
| __ addptr(rsp, frame::arg_reg_save_area_bytes); |
| } |
| |
| __ pop_CPU_state(); |
| // restore sp |
| __ mov(rsp, r13); |
| __ bind(L); |
| } |
| |
| |
| static void gen_c2i_adapter(MacroAssembler *masm, |
| int total_args_passed, |
| int comp_args_on_stack, |
| const BasicType *sig_bt, |
| const VMRegPair *regs, |
| Label& skip_fixup) { |
| // Before we get into the guts of the C2I adapter, see if we should be here |
| // at all. We've come from compiled code and are attempting to jump to the |
| // interpreter, which means the caller made a static call to get here |
| // (vcalls always get a compiled target if there is one). Check for a |
| // compiled target. If there is one, we need to patch the caller's call. |
| patch_callers_callsite(masm); |
| |
| __ bind(skip_fixup); |
| |
| // Since all args are passed on the stack, total_args_passed * |
| // Interpreter::stackElementSize is the space we need. Plus 1 because |
| // we also account for the return address location since |
| // we store it first rather than hold it in rax across all the shuffling |
| |
| int extraspace = (total_args_passed * Interpreter::stackElementSize) + wordSize; |
| |
| // stack is aligned, keep it that way |
| extraspace = round_to(extraspace, 2*wordSize); |
| |
| // Get return address |
| __ pop(rax); |
| |
| // set senderSP value |
| __ mov(r13, rsp); |
| |
| __ subptr(rsp, extraspace); |
| |
| // Store the return address in the expected location |
| __ movptr(Address(rsp, 0), rax); |
| |
| // Now write the args into the outgoing interpreter space |
| for (int i = 0; i < total_args_passed; i++) { |
| if (sig_bt[i] == T_VOID) { |
| assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); |
| continue; |
| } |
| |
| // offset to start parameters |
| int st_off = (total_args_passed - i) * Interpreter::stackElementSize; |
| int next_off = st_off - Interpreter::stackElementSize; |
| |
| // Say 4 args: |
| // i st_off |
| // 0 32 T_LONG |
| // 1 24 T_VOID |
| // 2 16 T_OBJECT |
| // 3 8 T_BOOL |
| // - 0 return address |
| // |
| // However to make thing extra confusing. Because we can fit a long/double in |
| // a single slot on a 64 bt vm and it would be silly to break them up, the interpreter |
| // leaves one slot empty and only stores to a single slot. In this case the |
| // slot that is occupied is the T_VOID slot. See I said it was confusing. |
| |
| VMReg r_1 = regs[i].first(); |
| VMReg r_2 = regs[i].second(); |
| if (!r_1->is_valid()) { |
| assert(!r_2->is_valid(), ""); |
| continue; |
| } |
| if (r_1->is_stack()) { |
| // memory to memory use rax |
| int ld_off = r_1->reg2stack() * VMRegImpl::stack_slot_size + extraspace; |
| if (!r_2->is_valid()) { |
| // sign extend?? |
| __ movl(rax, Address(rsp, ld_off)); |
| __ movptr(Address(rsp, st_off), rax); |
| |
| } else { |
| |
| __ movq(rax, Address(rsp, ld_off)); |
| |
| // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG |
| // T_DOUBLE and T_LONG use two slots in the interpreter |
| if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { |
| // ld_off == LSW, ld_off+wordSize == MSW |
| // st_off == MSW, next_off == LSW |
| __ movq(Address(rsp, next_off), rax); |
| #ifdef ASSERT |
| // Overwrite the unused slot with known junk |
| __ mov64(rax, CONST64(0xdeadffffdeadaaaa)); |
| __ movptr(Address(rsp, st_off), rax); |
| #endif /* ASSERT */ |
| } else { |
| __ movq(Address(rsp, st_off), rax); |
| } |
| } |
| } else if (r_1->is_Register()) { |
| Register r = r_1->as_Register(); |
| if (!r_2->is_valid()) { |
| // must be only an int (or less ) so move only 32bits to slot |
| // why not sign extend?? |
| __ movl(Address(rsp, st_off), r); |
| } else { |
| // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG |
| // T_DOUBLE and T_LONG use two slots in the interpreter |
| if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { |
| // long/double in gpr |
| #ifdef ASSERT |
| // Overwrite the unused slot with known junk |
| __ mov64(rax, CONST64(0xdeadffffdeadaaab)); |
| __ movptr(Address(rsp, st_off), rax); |
| #endif /* ASSERT */ |
| __ movq(Address(rsp, next_off), r); |
| } else { |
| __ movptr(Address(rsp, st_off), r); |
| } |
| } |
| } else { |
| assert(r_1->is_XMMRegister(), ""); |
| if (!r_2->is_valid()) { |
| // only a float use just part of the slot |
| __ movflt(Address(rsp, st_off), r_1->as_XMMRegister()); |
| } else { |
| #ifdef ASSERT |
| // Overwrite the unused slot with known junk |
| __ mov64(rax, CONST64(0xdeadffffdeadaaac)); |
| __ movptr(Address(rsp, st_off), rax); |
| #endif /* ASSERT */ |
| __ movdbl(Address(rsp, next_off), r_1->as_XMMRegister()); |
| } |
| } |
| } |
| |
| // Schedule the branch target address early. |
| __ movptr(rcx, Address(rbx, in_bytes(Method::interpreter_entry_offset()))); |
| __ jmp(rcx); |
| } |
| |
| static void range_check(MacroAssembler* masm, Register pc_reg, Register temp_reg, |
| address code_start, address code_end, |
| Label& L_ok) { |
| Label L_fail; |
| __ lea(temp_reg, ExternalAddress(code_start)); |
| __ cmpptr(pc_reg, temp_reg); |
| __ jcc(Assembler::belowEqual, L_fail); |
| __ lea(temp_reg, ExternalAddress(code_end)); |
| __ cmpptr(pc_reg, temp_reg); |
| __ jcc(Assembler::below, L_ok); |
| __ bind(L_fail); |
| } |
| |
| void SharedRuntime::gen_i2c_adapter(MacroAssembler *masm, |
| int total_args_passed, |
| int comp_args_on_stack, |
| const BasicType *sig_bt, |
| const VMRegPair *regs) { |
| |
| // Note: r13 contains the senderSP on entry. We must preserve it since |
| // we may do a i2c -> c2i transition if we lose a race where compiled |
| // code goes non-entrant while we get args ready. |
| // In addition we use r13 to locate all the interpreter args as |
| // we must align the stack to 16 bytes on an i2c entry else we |
| // lose alignment we expect in all compiled code and register |
| // save code can segv when fxsave instructions find improperly |
| // aligned stack pointer. |
| |
| // Adapters can be frameless because they do not require the caller |
| // to perform additional cleanup work, such as correcting the stack pointer. |
| // An i2c adapter is frameless because the *caller* frame, which is interpreted, |
| // routinely repairs its own stack pointer (from interpreter_frame_last_sp), |
| // even if a callee has modified the stack pointer. |
| // A c2i adapter is frameless because the *callee* frame, which is interpreted, |
| // routinely repairs its caller's stack pointer (from sender_sp, which is set |
| // up via the senderSP register). |
| // In other words, if *either* the caller or callee is interpreted, we can |
| // get the stack pointer repaired after a call. |
| // This is why c2i and i2c adapters cannot be indefinitely composed. |
| // In particular, if a c2i adapter were to somehow call an i2c adapter, |
| // both caller and callee would be compiled methods, and neither would |
| // clean up the stack pointer changes performed by the two adapters. |
| // If this happens, control eventually transfers back to the compiled |
| // caller, but with an uncorrected stack, causing delayed havoc. |
| |
| // Pick up the return address |
| __ movptr(rax, Address(rsp, 0)); |
| |
| if (VerifyAdapterCalls && |
| (Interpreter::code() != NULL || StubRoutines::code1() != NULL)) { |
| // So, let's test for cascading c2i/i2c adapters right now. |
| // assert(Interpreter::contains($return_addr) || |
| // StubRoutines::contains($return_addr), |
| // "i2c adapter must return to an interpreter frame"); |
| __ block_comment("verify_i2c { "); |
| Label L_ok; |
| if (Interpreter::code() != NULL) |
| range_check(masm, rax, r11, |
| Interpreter::code()->code_start(), Interpreter::code()->code_end(), |
| L_ok); |
| if (StubRoutines::code1() != NULL) |
| range_check(masm, rax, r11, |
| StubRoutines::code1()->code_begin(), StubRoutines::code1()->code_end(), |
| L_ok); |
| if (StubRoutines::code2() != NULL) |
| range_check(masm, rax, r11, |
| StubRoutines::code2()->code_begin(), StubRoutines::code2()->code_end(), |
| L_ok); |
| const char* msg = "i2c adapter must return to an interpreter frame"; |
| __ block_comment(msg); |
| __ stop(msg); |
| __ bind(L_ok); |
| __ block_comment("} verify_i2ce "); |
| } |
| |
| // Must preserve original SP for loading incoming arguments because |
| // we need to align the outgoing SP for compiled code. |
| __ movptr(r11, rsp); |
| |
| // Cut-out for having no stack args. Since up to 2 int/oop args are passed |
| // in registers, we will occasionally have no stack args. |
| int comp_words_on_stack = 0; |
| if (comp_args_on_stack) { |
| // Sig words on the stack are greater-than VMRegImpl::stack0. Those in |
| // registers are below. By subtracting stack0, we either get a negative |
| // number (all values in registers) or the maximum stack slot accessed. |
| |
| // Convert 4-byte c2 stack slots to words. |
| comp_words_on_stack = round_to(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord; |
| // Round up to miminum stack alignment, in wordSize |
| comp_words_on_stack = round_to(comp_words_on_stack, 2); |
| __ subptr(rsp, comp_words_on_stack * wordSize); |
| } |
| |
| |
| // Ensure compiled code always sees stack at proper alignment |
| __ andptr(rsp, -16); |
| |
| // push the return address and misalign the stack that youngest frame always sees |
| // as far as the placement of the call instruction |
| __ push(rax); |
| |
| // Put saved SP in another register |
| const Register saved_sp = rax; |
| __ movptr(saved_sp, r11); |
| |
| // Will jump to the compiled code just as if compiled code was doing it. |
| // Pre-load the register-jump target early, to schedule it better. |
| __ movptr(r11, Address(rbx, in_bytes(Method::from_compiled_offset()))); |
| |
| #if INCLUDE_JVMCI |
| if (EnableJVMCI) { |
| // check if this call should be routed towards a specific entry point |
| __ cmpptr(Address(r15_thread, in_bytes(JavaThread::jvmci_alternate_call_target_offset())), 0); |
| Label no_alternative_target; |
| __ jcc(Assembler::equal, no_alternative_target); |
| __ movptr(r11, Address(r15_thread, in_bytes(JavaThread::jvmci_alternate_call_target_offset()))); |
| __ movptr(Address(r15_thread, in_bytes(JavaThread::jvmci_alternate_call_target_offset())), 0); |
| __ bind(no_alternative_target); |
| } |
| #endif // INCLUDE_JVMCI |
| |
| // Now generate the shuffle code. Pick up all register args and move the |
| // rest through the floating point stack top. |
| for (int i = 0; i < total_args_passed; i++) { |
| if (sig_bt[i] == T_VOID) { |
| // Longs and doubles are passed in native word order, but misaligned |
| // in the 32-bit build. |
| assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); |
| continue; |
| } |
| |
| // Pick up 0, 1 or 2 words from SP+offset. |
| |
| assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(), |
| "scrambled load targets?"); |
| // Load in argument order going down. |
| int ld_off = (total_args_passed - i)*Interpreter::stackElementSize; |
| // Point to interpreter value (vs. tag) |
| int next_off = ld_off - Interpreter::stackElementSize; |
| // |
| // |
| // |
| VMReg r_1 = regs[i].first(); |
| VMReg r_2 = regs[i].second(); |
| if (!r_1->is_valid()) { |
| assert(!r_2->is_valid(), ""); |
| continue; |
| } |
| if (r_1->is_stack()) { |
| // Convert stack slot to an SP offset (+ wordSize to account for return address ) |
| int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize; |
| |
| // We can use r13 as a temp here because compiled code doesn't need r13 as an input |
| // and if we end up going thru a c2i because of a miss a reasonable value of r13 |
| // will be generated. |
| if (!r_2->is_valid()) { |
| // sign extend??? |
| __ movl(r13, Address(saved_sp, ld_off)); |
| __ movptr(Address(rsp, st_off), r13); |
| } else { |
| // |
| // We are using two optoregs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE |
| // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case |
| // So we must adjust where to pick up the data to match the interpreter. |
| // |
| // Interpreter local[n] == MSW, local[n+1] == LSW however locals |
| // are accessed as negative so LSW is at LOW address |
| |
| // ld_off is MSW so get LSW |
| const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? |
| next_off : ld_off; |
| __ movq(r13, Address(saved_sp, offset)); |
| // st_off is LSW (i.e. reg.first()) |
| __ movq(Address(rsp, st_off), r13); |
| } |
| } else if (r_1->is_Register()) { // Register argument |
| Register r = r_1->as_Register(); |
| assert(r != rax, "must be different"); |
| if (r_2->is_valid()) { |
| // |
| // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE |
| // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case |
| // So we must adjust where to pick up the data to match the interpreter. |
| |
| const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? |
| next_off : ld_off; |
| |
| // this can be a misaligned move |
| __ movq(r, Address(saved_sp, offset)); |
| } else { |
| // sign extend and use a full word? |
| __ movl(r, Address(saved_sp, ld_off)); |
| } |
| } else { |
| if (!r_2->is_valid()) { |
| __ movflt(r_1->as_XMMRegister(), Address(saved_sp, ld_off)); |
| } else { |
| __ movdbl(r_1->as_XMMRegister(), Address(saved_sp, next_off)); |
| } |
| } |
| } |
| |
| // 6243940 We might end up in handle_wrong_method if |
| // the callee is deoptimized as we race thru here. If that |
| // happens we don't want to take a safepoint because the |
| // caller frame will look interpreted and arguments are now |
| // "compiled" so it is much better to make this transition |
| // invisible to the stack walking code. Unfortunately if |
| // we try and find the callee by normal means a safepoint |
| // is possible. So we stash the desired callee in the thread |
| // and the vm will find there should this case occur. |
| |
| __ movptr(Address(r15_thread, JavaThread::callee_target_offset()), rbx); |
| |
| // put Method* where a c2i would expect should we end up there |
| // only needed becaus eof c2 resolve stubs return Method* as a result in |
| // rax |
| __ mov(rax, rbx); |
| __ jmp(r11); |
| } |
| |
| // --------------------------------------------------------------- |
| AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm, |
| int total_args_passed, |
| int comp_args_on_stack, |
| const BasicType *sig_bt, |
| const VMRegPair *regs, |
| AdapterFingerPrint* fingerprint) { |
| address i2c_entry = __ pc(); |
| |
| gen_i2c_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs); |
| |
| // ------------------------------------------------------------------------- |
| // Generate a C2I adapter. On entry we know rbx holds the Method* during calls |
| // to the interpreter. The args start out packed in the compiled layout. They |
| // need to be unpacked into the interpreter layout. This will almost always |
| // require some stack space. We grow the current (compiled) stack, then repack |
| // the args. We finally end in a jump to the generic interpreter entry point. |
| // On exit from the interpreter, the interpreter will restore our SP (lest the |
| // compiled code, which relys solely on SP and not RBP, get sick). |
| |
| address c2i_unverified_entry = __ pc(); |
| Label skip_fixup; |
| Label ok; |
| |
| Register holder = rax; |
| Register receiver = j_rarg0; |
| Register temp = rbx; |
| |
| { |
| __ load_klass(temp, receiver); |
| __ cmpptr(temp, Address(holder, CompiledICHolder::holder_klass_offset())); |
| __ movptr(rbx, Address(holder, CompiledICHolder::holder_method_offset())); |
| __ jcc(Assembler::equal, ok); |
| __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); |
| |
| __ bind(ok); |
| // Method might have been compiled since the call site was patched to |
| // interpreted if that is the case treat it as a miss so we can get |
| // the call site corrected. |
| __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD); |
| __ jcc(Assembler::equal, skip_fixup); |
| __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); |
| } |
| |
| address c2i_entry = __ pc(); |
| |
| gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup); |
| |
| __ flush(); |
| return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
| } |
| |
| int SharedRuntime::c_calling_convention(const BasicType *sig_bt, |
| VMRegPair *regs, |
| VMRegPair *regs2, |
| int total_args_passed) { |
| assert(regs2 == NULL, "not needed on x86"); |
| // We return the amount of VMRegImpl stack slots we need to reserve for all |
| // the arguments NOT counting out_preserve_stack_slots. |
| |
| // NOTE: These arrays will have to change when c1 is ported |
| #ifdef _WIN64 |
| static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { |
| c_rarg0, c_rarg1, c_rarg2, c_rarg3 |
| }; |
| static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { |
| c_farg0, c_farg1, c_farg2, c_farg3 |
| }; |
| #else |
| static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { |
| c_rarg0, c_rarg1, c_rarg2, c_rarg3, c_rarg4, c_rarg5 |
| }; |
| static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { |
| c_farg0, c_farg1, c_farg2, c_farg3, |
| c_farg4, c_farg5, c_farg6, c_farg7 |
| }; |
| #endif // _WIN64 |
| |
| |
| uint int_args = 0; |
| uint fp_args = 0; |
| uint stk_args = 0; // inc by 2 each time |
| |
| for (int i = 0; i < total_args_passed; i++) { |
| switch (sig_bt[i]) { |
| case T_BOOLEAN: |
| case T_CHAR: |
| case T_BYTE: |
| case T_SHORT: |
| case T_INT: |
| if (int_args < Argument::n_int_register_parameters_c) { |
| regs[i].set1(INT_ArgReg[int_args++]->as_VMReg()); |
| #ifdef _WIN64 |
| fp_args++; |
| // Allocate slots for callee to stuff register args the stack. |
| stk_args += 2; |
| #endif |
| } else { |
| regs[i].set1(VMRegImpl::stack2reg(stk_args)); |
| stk_args += 2; |
| } |
| break; |
| case T_LONG: |
| assert(sig_bt[i + 1] == T_VOID, "expecting half"); |
| // fall through |
| case T_OBJECT: |
| case T_ARRAY: |
| case T_ADDRESS: |
| case T_METADATA: |
| if (int_args < Argument::n_int_register_parameters_c) { |
| regs[i].set2(INT_ArgReg[int_args++]->as_VMReg()); |
| #ifdef _WIN64 |
| fp_args++; |
| stk_args += 2; |
| #endif |
| } else { |
| regs[i].set2(VMRegImpl::stack2reg(stk_args)); |
| stk_args += 2; |
| } |
| break; |
| case T_FLOAT: |
| if (fp_args < Argument::n_float_register_parameters_c) { |
| regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg()); |
| #ifdef _WIN64 |
| int_args++; |
| // Allocate slots for callee to stuff register args the stack. |
| stk_args += 2; |
| #endif |
| } else { |
| regs[i].set1(VMRegImpl::stack2reg(stk_args)); |
| stk_args += 2; |
| } |
| break; |
| case T_DOUBLE: |
| assert(sig_bt[i + 1] == T_VOID, "expecting half"); |
| if (fp_args < Argument::n_float_register_parameters_c) { |
| regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg()); |
| #ifdef _WIN64 |
| int_args++; |
| // Allocate slots for callee to stuff register args the stack. |
| stk_args += 2; |
| #endif |
| } else { |
| regs[i].set2(VMRegImpl::stack2reg(stk_args)); |
| stk_args += 2; |
| } |
| break; |
| case T_VOID: // Halves of longs and doubles |
| assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half"); |
| regs[i].set_bad(); |
| break; |
| default: |
| ShouldNotReachHere(); |
| break; |
| } |
| } |
| #ifdef _WIN64 |
| // windows abi requires that we always allocate enough stack space |
| // for 4 64bit registers to be stored down. |
| if (stk_args < 8) { |
| stk_args = 8; |
| } |
| #endif // _WIN64 |
| |
| return stk_args; |
| } |
| |
| // On 64 bit we will store integer like items to the stack as |
| // 64 bits items (sparc abi) even though java would only store |
| // 32bits for a parameter. On 32bit it will simply be 32 bits |
| // So this routine will do 32->32 on 32bit and 32->64 on 64bit |
| static void move32_64(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { |
| if (src.first()->is_stack()) { |
| if (dst.first()->is_stack()) { |
| // stack to stack |
| __ movslq(rax, Address(rbp, reg2offset_in(src.first()))); |
| __ movq(Address(rsp, reg2offset_out(dst.first())), rax); |
| } else { |
| // stack to reg |
| __ movslq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()))); |
| } |
| } else if (dst.first()->is_stack()) { |
| // reg to stack |
| // Do we really have to sign extend??? |
| // __ movslq(src.first()->as_Register(), src.first()->as_Register()); |
| __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); |
| } else { |
| // Do we really have to sign extend??? |
| // __ movslq(dst.first()->as_Register(), src.first()->as_Register()); |
| if (dst.first() != src.first()) { |
| __ movq(dst.first()->as_Register(), src.first()->as_Register()); |
| } |
| } |
| } |
| |
| static void move_ptr(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { |
| if (src.first()->is_stack()) { |
| if (dst.first()->is_stack()) { |
| // stack to stack |
| __ movq(rax, Address(rbp, reg2offset_in(src.first()))); |
| __ movq(Address(rsp, reg2offset_out(dst.first())), rax); |
| } else { |
| // stack to reg |
| __ movq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()))); |
| } |
| } else if (dst.first()->is_stack()) { |
| // reg to stack |
| __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); |
| } else { |
| if (dst.first() != src.first()) { |
| __ movq(dst.first()->as_Register(), src.first()->as_Register()); |
| } |
| } |
| } |
| |
| // An oop arg. Must pass a handle not the oop itself |
| static void object_move(MacroAssembler* masm, |
| OopMap* map, |
| int oop_handle_offset, |
| int framesize_in_slots, |
| VMRegPair src, |
| VMRegPair dst, |
| bool is_receiver, |
| int* receiver_offset) { |
| |
| // must pass a handle. First figure out the location we use as a handle |
| |
| Register rHandle = dst.first()->is_stack() ? rax : dst.first()->as_Register(); |
| |
| // See if oop is NULL if it is we need no handle |
| |
| if (src.first()->is_stack()) { |
| |
| // Oop is already on the stack as an argument |
| int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); |
| map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots)); |
| if (is_receiver) { |
| *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size; |
| } |
| |
| __ cmpptr(Address(rbp, reg2offset_in(src.first())), (int32_t)NULL_WORD); |
| __ lea(rHandle, Address(rbp, reg2offset_in(src.first()))); |
| // conditionally move a NULL |
| __ cmovptr(Assembler::equal, rHandle, Address(rbp, reg2offset_in(src.first()))); |
| } else { |
| |
| // Oop is in an a register we must store it to the space we reserve |
| // on the stack for oop_handles and pass a handle if oop is non-NULL |
| |
| const Register rOop = src.first()->as_Register(); |
| int oop_slot; |
| if (rOop == j_rarg0) |
| oop_slot = 0; |
| else if (rOop == j_rarg1) |
| oop_slot = 1; |
| else if (rOop == j_rarg2) |
| oop_slot = 2; |
| else if (rOop == j_rarg3) |
| oop_slot = 3; |
| else if (rOop == j_rarg4) |
| oop_slot = 4; |
| else { |
| assert(rOop == j_rarg5, "wrong register"); |
| oop_slot = 5; |
| } |
| |
| oop_slot = oop_slot * VMRegImpl::slots_per_word + oop_handle_offset; |
| int offset = oop_slot*VMRegImpl::stack_slot_size; |
| |
| map->set_oop(VMRegImpl::stack2reg(oop_slot)); |
| // Store oop in handle area, may be NULL |
| __ movptr(Address(rsp, offset), rOop); |
| if (is_receiver) { |
| *receiver_offset = offset; |
| } |
| |
| __ cmpptr(rOop, (int32_t)NULL_WORD); |
| __ lea(rHandle, Address(rsp, offset)); |
| // conditionally move a NULL from the handle area where it was just stored |
| __ cmovptr(Assembler::equal, rHandle, Address(rsp, offset)); |
| } |
| |
| // If arg is on the stack then place it otherwise it is already in correct reg. |
| if (dst.first()->is_stack()) { |
| __ movptr(Address(rsp, reg2offset_out(dst.first())), rHandle); |
| } |
| } |
| |
| // A float arg may have to do float reg int reg conversion |
| static void float_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { |
| assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move"); |
| |
| // The calling conventions assures us that each VMregpair is either |
| // all really one physical register or adjacent stack slots. |
| // This greatly simplifies the cases here compared to sparc. |
| |
| if (src.first()->is_stack()) { |
| if (dst.first()->is_stack()) { |
| __ movl(rax, Address(rbp, reg2offset_in(src.first()))); |
| __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); |
| } else { |
| // stack to reg |
| assert(dst.first()->is_XMMRegister(), "only expect xmm registers as parameters"); |
| __ movflt(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_in(src.first()))); |
| } |
| } else if (dst.first()->is_stack()) { |
| // reg to stack |
| assert(src.first()->is_XMMRegister(), "only expect xmm registers as parameters"); |
| __ movflt(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); |
| } else { |
| // reg to reg |
| // In theory these overlap but the ordering is such that this is likely a nop |
| if ( src.first() != dst.first()) { |
| __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); |
| } |
| } |
| } |
| |
| // A long move |
| static void long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { |
| |
| // The calling conventions assures us that each VMregpair is either |
| // all really one physical register or adjacent stack slots. |
| // This greatly simplifies the cases here compared to sparc. |
| |
| if (src.is_single_phys_reg() ) { |
| if (dst.is_single_phys_reg()) { |
| if (dst.first() != src.first()) { |
| __ mov(dst.first()->as_Register(), src.first()->as_Register()); |
| } |
| } else { |
| assert(dst.is_single_reg(), "not a stack pair"); |
| __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); |
| } |
| } else if (dst.is_single_phys_reg()) { |
| assert(src.is_single_reg(), "not a stack pair"); |
| __ movq(dst.first()->as_Register(), Address(rbp, reg2offset_out(src.first()))); |
| } else { |
| assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); |
| __ movq(rax, Address(rbp, reg2offset_in(src.first()))); |
| __ movq(Address(rsp, reg2offset_out(dst.first())), rax); |
| } |
| } |
| |
| // A double move |
| static void double_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { |
| |
| // The calling conventions assures us that each VMregpair is either |
| // all really one physical register or adjacent stack slots. |
| // This greatly simplifies the cases here compared to sparc. |
| |
| if (src.is_single_phys_reg() ) { |
| if (dst.is_single_phys_reg()) { |
| // In theory these overlap but the ordering is such that this is likely a nop |
| if ( src.first() != dst.first()) { |
| __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); |
| } |
| } else { |
| assert(dst.is_single_reg(), "not a stack pair"); |
| __ movdbl(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); |
| } |
| } else if (dst.is_single_phys_reg()) { |
| assert(src.is_single_reg(), "not a stack pair"); |
| __ movdbl(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_out(src.first()))); |
| } else { |
| assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); |
| __ movq(rax, Address(rbp, reg2offset_in(src.first()))); |
| __ movq(Address(rsp, reg2offset_out(dst.first())), rax); |
| } |
| } |
| |
| |
| void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { |
| // We always ignore the frame_slots arg and just use the space just below frame pointer |
| // which by this time is free to use |
| switch (ret_type) { |
| case T_FLOAT: |
| __ movflt(Address(rbp, -wordSize), xmm0); |
| break; |
| case T_DOUBLE: |
| __ movdbl(Address(rbp, -wordSize), xmm0); |
| break; |
| case T_VOID: break; |
| default: { |
| __ movptr(Address(rbp, -wordSize), rax); |
| } |
| } |
| } |
| |
| void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { |
| // We always ignore the frame_slots arg and just use the space just below frame pointer |
| // which by this time is free to use |
| switch (ret_type) { |
| case T_FLOAT: |
| __ movflt(xmm0, Address(rbp, -wordSize)); |
| break; |
| case T_DOUBLE: |
| __ movdbl(xmm0, Address(rbp, -wordSize)); |
| break; |
| case T_VOID: break; |
| default: { |
| __ movptr(rax, Address(rbp, -wordSize)); |
| } |
| } |
| } |
| |
| static void save_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { |
| for ( int i = first_arg ; i < arg_count ; i++ ) { |
| if (args[i].first()->is_Register()) { |
| __ push(args[i].first()->as_Register()); |
| } else if (args[i].first()->is_XMMRegister()) { |
| __ subptr(rsp, 2*wordSize); |
| __ movdbl(Address(rsp, 0), args[i].first()->as_XMMRegister()); |
| } |
| } |
| } |
| |
| static void restore_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { |
| for ( int i = arg_count - 1 ; i >= first_arg ; i-- ) { |
| if (args[i].first()->is_Register()) { |
| __ pop(args[i].first()->as_Register()); |
| } else if (args[i].first()->is_XMMRegister()) { |
| __ movdbl(args[i].first()->as_XMMRegister(), Address(rsp, 0)); |
| __ addptr(rsp, 2*wordSize); |
| } |
| } |
| } |
| |
| |
| static void save_or_restore_arguments(MacroAssembler* masm, |
| const int stack_slots, |
| const int total_in_args, |
| const int arg_save_area, |
| OopMap* map, |
| VMRegPair* in_regs, |
| BasicType* in_sig_bt) { |
| // if map is non-NULL then the code should store the values, |
| // otherwise it should load them. |
| int slot = arg_save_area; |
| // Save down double word first |
| for ( int i = 0; i < total_in_args; i++) { |
| if (in_regs[i].first()->is_XMMRegister() && in_sig_bt[i] == T_DOUBLE) { |
| int offset = slot * VMRegImpl::stack_slot_size; |
| slot += VMRegImpl::slots_per_word; |
| assert(slot <= stack_slots, "overflow"); |
| if (map != NULL) { |
| __ movdbl(Address(rsp, offset), in_regs[i].first()->as_XMMRegister()); |
| } else { |
| __ movdbl(in_regs[i].first()->as_XMMRegister(), Address(rsp, offset)); |
| } |
| } |
| if (in_regs[i].first()->is_Register() && |
| (in_sig_bt[i] == T_LONG || in_sig_bt[i] == T_ARRAY)) { |
| int offset = slot * VMRegImpl::stack_slot_size; |
| if (map != NULL) { |
| __ movq(Address(rsp, offset), in_regs[i].first()->as_Register()); |
| if (in_sig_bt[i] == T_ARRAY) { |
| map->set_oop(VMRegImpl::stack2reg(slot));; |
| } |
| } else { |
| __ movq(in_regs[i].first()->as_Register(), Address(rsp, offset)); |
| } |
| slot += VMRegImpl::slots_per_word; |
| } |
| } |
| // Save or restore single word registers |
| for ( int i = 0; i < total_in_args; i++) { |
| if (in_regs[i].first()->is_Register()) { |
| int offset = slot * VMRegImpl::stack_slot_size; |
| slot++; |
| assert(slot <= stack_slots, "overflow"); |
| |
| // Value is in an input register pass we must flush it to the stack |
| const Register reg = in_regs[i].first()->as_Register(); |
| switch (in_sig_bt[i]) { |
| case T_BOOLEAN: |
| case T_CHAR: |
| case T_BYTE: |
| case T_SHORT: |
| case T_INT: |
| if (map != NULL) { |
| __ movl(Address(rsp, offset), reg); |
| } else { |
| __ movl(reg, Address(rsp, offset)); |
| } |
| break; |
| case T_ARRAY: |
| case T_LONG: |
| // handled above |
| break; |
| case T_OBJECT: |
| default: ShouldNotReachHere(); |
| } |
| } else if (in_regs[i].first()->is_XMMRegister()) { |
| if (in_sig_bt[i] == T_FLOAT) { |
| int offset = slot * VMRegImpl::stack_slot_size; |
| slot++; |
| assert(slot <= stack_slots, "overflow"); |
| if (map != NULL) { |
| __ movflt(Address(rsp, offset), in_regs[i].first()->as_XMMRegister()); |
| } else { |
| __ movflt(in_regs[i].first()->as_XMMRegister(), Address(rsp, offset)); |
| } |
| } |
| } else if (in_regs[i].first()->is_stack()) { |
| if (in_sig_bt[i] == T_ARRAY && map != NULL) { |
| int offset_in_older_frame = in_regs[i].first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); |
| map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + stack_slots)); |
| } |
| } |
| } |
| } |
| |
| |
| // Check GCLocker::needs_gc and enter the runtime if it's true. This |
| // keeps a new JNI critical region from starting until a GC has been |
| // forced. Save down any oops in registers and describe them in an |
| // OopMap. |
| static void check_needs_gc_for_critical_native(MacroAssembler* masm, |
| int stack_slots, |
| int total_c_args, |
| int total_in_args, |
| int arg_save_area, |
| OopMapSet* oop_maps, |
| VMRegPair* in_regs, |
| BasicType* in_sig_bt) { |
| __ block_comment("check GCLocker::needs_gc"); |
| Label cont; |
| __ cmp8(ExternalAddress((address)GCLocker::needs_gc_address()), false); |
| __ jcc(Assembler::equal, cont); |
| |
| // Save down any incoming oops and call into the runtime to halt for a GC |
| |
| OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); |
| save_or_restore_arguments(masm, stack_slots, total_in_args, |
| arg_save_area, map, in_regs, in_sig_bt); |
| |
| address the_pc = __ pc(); |
| oop_maps->add_gc_map( __ offset(), map); |
| __ set_last_Java_frame(rsp, noreg, the_pc); |
| |
| __ block_comment("block_for_jni_critical"); |
| __ movptr(c_rarg0, r15_thread); |
| __ mov(r12, rsp); // remember sp |
| __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows |
| __ andptr(rsp, -16); // align stack as required by ABI |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::block_for_jni_critical))); |
| __ mov(rsp, r12); // restore sp |
| __ reinit_heapbase(); |
| |
| __ reset_last_Java_frame(false, true); |
| |
| save_or_restore_arguments(masm, stack_slots, total_in_args, |
| arg_save_area, NULL, in_regs, in_sig_bt); |
| |
| __ bind(cont); |
| #ifdef ASSERT |
| if (StressCriticalJNINatives) { |
| // Stress register saving |
| OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); |
| save_or_restore_arguments(masm, stack_slots, total_in_args, |
| arg_save_area, map, in_regs, in_sig_bt); |
| // Destroy argument registers |
| for (int i = 0; i < total_in_args - 1; i++) { |
| if (in_regs[i].first()->is_Register()) { |
| const Register reg = in_regs[i].first()->as_Register(); |
| __ xorptr(reg, reg); |
| } else if (in_regs[i].first()->is_XMMRegister()) { |
| __ xorpd(in_regs[i].first()->as_XMMRegister(), in_regs[i].first()->as_XMMRegister()); |
| } else if (in_regs[i].first()->is_FloatRegister()) { |
| ShouldNotReachHere(); |
| } else if (in_regs[i].first()->is_stack()) { |
| // Nothing to do |
| } else { |
| ShouldNotReachHere(); |
| } |
| if (in_sig_bt[i] == T_LONG || in_sig_bt[i] == T_DOUBLE) { |
| i++; |
| } |
| } |
| |
| save_or_restore_arguments(masm, stack_slots, total_in_args, |
| arg_save_area, NULL, in_regs, in_sig_bt); |
| } |
| #endif |
| } |
| |
| // Unpack an array argument into a pointer to the body and the length |
| // if the array is non-null, otherwise pass 0 for both. |
| static void unpack_array_argument(MacroAssembler* masm, VMRegPair reg, BasicType in_elem_type, VMRegPair body_arg, VMRegPair length_arg) { |
| Register tmp_reg = rax; |
| assert(!body_arg.first()->is_Register() || body_arg.first()->as_Register() != tmp_reg, |
| "possible collision"); |
| assert(!length_arg.first()->is_Register() || length_arg.first()->as_Register() != tmp_reg, |
| "possible collision"); |
| |
| __ block_comment("unpack_array_argument {"); |
| |
| // Pass the length, ptr pair |
| Label is_null, done; |
| VMRegPair tmp; |
| tmp.set_ptr(tmp_reg->as_VMReg()); |
| if (reg.first()->is_stack()) { |
| // Load the arg up from the stack |
| move_ptr(masm, reg, tmp); |
| reg = tmp; |
| } |
| __ testptr(reg.first()->as_Register(), reg.first()->as_Register()); |
| __ jccb(Assembler::equal, is_null); |
| __ lea(tmp_reg, Address(reg.first()->as_Register(), arrayOopDesc::base_offset_in_bytes(in_elem_type))); |
| move_ptr(masm, tmp, body_arg); |
| // load the length relative to the body. |
| __ movl(tmp_reg, Address(tmp_reg, arrayOopDesc::length_offset_in_bytes() - |
| arrayOopDesc::base_offset_in_bytes(in_elem_type))); |
| move32_64(masm, tmp, length_arg); |
| __ jmpb(done); |
| __ bind(is_null); |
| // Pass zeros |
| __ xorptr(tmp_reg, tmp_reg); |
| move_ptr(masm, tmp, body_arg); |
| move32_64(masm, tmp, length_arg); |
| __ bind(done); |
| |
| __ block_comment("} unpack_array_argument"); |
| } |
| |
| |
| // Different signatures may require very different orders for the move |
| // to avoid clobbering other arguments. There's no simple way to |
| // order them safely. Compute a safe order for issuing stores and |
| // break any cycles in those stores. This code is fairly general but |
| // it's not necessary on the other platforms so we keep it in the |
| // platform dependent code instead of moving it into a shared file. |
| // (See bugs 7013347 & 7145024.) |
| // Note that this code is specific to LP64. |
| class ComputeMoveOrder: public StackObj { |
| class MoveOperation: public ResourceObj { |
| friend class ComputeMoveOrder; |
| private: |
| VMRegPair _src; |
| VMRegPair _dst; |
| int _src_index; |
| int _dst_index; |
| bool _processed; |
| MoveOperation* _next; |
| MoveOperation* _prev; |
| |
| static int get_id(VMRegPair r) { |
| return r.first()->value(); |
| } |
| |
| public: |
| MoveOperation(int src_index, VMRegPair src, int dst_index, VMRegPair dst): |
| _src(src) |
| , _src_index(src_index) |
| , _dst(dst) |
| , _dst_index(dst_index) |
| , _next(NULL) |
| , _prev(NULL) |
| , _processed(false) { |
| } |
| |
| VMRegPair src() const { return _src; } |
| int src_id() const { return get_id(src()); } |
| int src_index() const { return _src_index; } |
| VMRegPair dst() const { return _dst; } |
| void set_dst(int i, VMRegPair dst) { _dst_index = i, _dst = dst; } |
| int dst_index() const { return _dst_index; } |
| int dst_id() const { return get_id(dst()); } |
| MoveOperation* next() const { return _next; } |
| MoveOperation* prev() const { return _prev; } |
| void set_processed() { _processed = true; } |
| bool is_processed() const { return _processed; } |
| |
| // insert |
| void break_cycle(VMRegPair temp_register) { |
| // create a new store following the last store |
| // to move from the temp_register to the original |
| MoveOperation* new_store = new MoveOperation(-1, temp_register, dst_index(), dst()); |
| |
| // break the cycle of links and insert new_store at the end |
| // break the reverse link. |
| MoveOperation* p = prev(); |
| assert(p->next() == this, "must be"); |
| _prev = NULL; |
| p->_next = new_store; |
| new_store->_prev = p; |
| |
| // change the original store to save it's value in the temp. |
| set_dst(-1, temp_register); |
| } |
| |
| void link(GrowableArray<MoveOperation*>& killer) { |
| // link this store in front the store that it depends on |
| MoveOperation* n = killer.at_grow(src_id(), NULL); |
| if (n != NULL) { |
| assert(_next == NULL && n->_prev == NULL, "shouldn't have been set yet"); |
| _next = n; |
| n->_prev = this; |
| } |
| } |
| }; |
| |
| private: |
| GrowableArray<MoveOperation*> edges; |
| |
| public: |
| ComputeMoveOrder(int total_in_args, VMRegPair* in_regs, int total_c_args, VMRegPair* out_regs, |
| BasicType* in_sig_bt, GrowableArray<int>& arg_order, VMRegPair tmp_vmreg) { |
| // Move operations where the dest is the stack can all be |
| // scheduled first since they can't interfere with the other moves. |
| for (int i = total_in_args - 1, c_arg = total_c_args - 1; i >= 0; i--, c_arg--) { |
| if (in_sig_bt[i] == T_ARRAY) { |
| c_arg--; |
| if (out_regs[c_arg].first()->is_stack() && |
| out_regs[c_arg + 1].first()->is_stack()) { |
| arg_order.push(i); |
| arg_order.push(c_arg); |
| } else { |
| if (out_regs[c_arg].first()->is_stack() || |
| in_regs[i].first() == out_regs[c_arg].first()) { |
| add_edge(i, in_regs[i].first(), c_arg, out_regs[c_arg + 1]); |
| } else { |
| add_edge(i, in_regs[i].first(), c_arg, out_regs[c_arg]); |
| } |
| } |
| } else if (in_sig_bt[i] == T_VOID) { |
| arg_order.push(i); |
| arg_order.push(c_arg); |
| } else { |
| if (out_regs[c_arg].first()->is_stack() || |
| in_regs[i].first() == out_regs[c_arg].first()) { |
| arg_order.push(i); |
| arg_order.push(c_arg); |
| } else { |
| add_edge(i, in_regs[i].first(), c_arg, out_regs[c_arg]); |
| } |
| } |
| } |
| // Break any cycles in the register moves and emit the in the |
| // proper order. |
| GrowableArray<MoveOperation*>* stores = get_store_order(tmp_vmreg); |
| for (int i = 0; i < stores->length(); i++) { |
| arg_order.push(stores->at(i)->src_index()); |
| arg_order.push(stores->at(i)->dst_index()); |
| } |
| } |
| |
| // Collected all the move operations |
| void add_edge(int src_index, VMRegPair src, int dst_index, VMRegPair dst) { |
| if (src.first() == dst.first()) return; |
| edges.append(new MoveOperation(src_index, src, dst_index, dst)); |
| } |
| |
| // Walk the edges breaking cycles between moves. The result list |
| // can be walked in order to produce the proper set of loads |
| GrowableArray<MoveOperation*>* get_store_order(VMRegPair temp_register) { |
| // Record which moves kill which values |
| GrowableArray<MoveOperation*> killer; |
| for (int i = 0; i < edges.length(); i++) { |
| MoveOperation* s = edges.at(i); |
| assert(killer.at_grow(s->dst_id(), NULL) == NULL, "only one killer"); |
| killer.at_put_grow(s->dst_id(), s, NULL); |
| } |
| assert(killer.at_grow(MoveOperation::get_id(temp_register), NULL) == NULL, |
| "make sure temp isn't in the registers that are killed"); |
| |
| // create links between loads and stores |
| for (int i = 0; i < edges.length(); i++) { |
| edges.at(i)->link(killer); |
| } |
| |
| // at this point, all the move operations are chained together |
| // in a doubly linked list. Processing it backwards finds |
| // the beginning of the chain, forwards finds the end. If there's |
| // a cycle it can be broken at any point, so pick an edge and walk |
| // backward until the list ends or we end where we started. |
| GrowableArray<MoveOperation*>* stores = new GrowableArray<MoveOperation*>(); |
| for (int e = 0; e < edges.length(); e++) { |
| MoveOperation* s = edges.at(e); |
| if (!s->is_processed()) { |
| MoveOperation* start = s; |
| // search for the beginning of the chain or cycle |
| while (start->prev() != NULL && start->prev() != s) { |
| start = start->prev(); |
| } |
| if (start->prev() == s) { |
| start->break_cycle(temp_register); |
| } |
| // walk the chain forward inserting to store list |
| while (start != NULL) { |
| stores->append(start); |
| start->set_processed(); |
| start = start->next(); |
| } |
| } |
| } |
| return stores; |
| } |
| }; |
| |
| static void verify_oop_args(MacroAssembler* masm, |
| const methodHandle& method, |
| const BasicType* sig_bt, |
| const VMRegPair* regs) { |
| Register temp_reg = rbx; // not part of any compiled calling seq |
| if (VerifyOops) { |
| for (int i = 0; i < method->size_of_parameters(); i++) { |
| if (sig_bt[i] == T_OBJECT || |
| sig_bt[i] == T_ARRAY) { |
| VMReg r = regs[i].first(); |
| assert(r->is_valid(), "bad oop arg"); |
| if (r->is_stack()) { |
| __ movptr(temp_reg, Address(rsp, r->reg2stack() * VMRegImpl::stack_slot_size + wordSize)); |
| __ verify_oop(temp_reg); |
| } else { |
| __ verify_oop(r->as_Register()); |
| } |
| } |
| } |
| } |
| } |
| |
| static void gen_special_dispatch(MacroAssembler* masm, |
| methodHandle method, |
| const BasicType* sig_bt, |
| const VMRegPair* regs) { |
| verify_oop_args(masm, method, sig_bt, regs); |
| vmIntrinsics::ID iid = method->intrinsic_id(); |
| |
| // Now write the args into the outgoing interpreter space |
| bool has_receiver = false; |
| Register receiver_reg = noreg; |
| int member_arg_pos = -1; |
| Register member_reg = noreg; |
| int ref_kind = MethodHandles::signature_polymorphic_intrinsic_ref_kind(iid); |
| if (ref_kind != 0) { |
| member_arg_pos = method->size_of_parameters() - 1; // trailing MemberName argument |
| member_reg = rbx; // known to be free at this point |
| has_receiver = MethodHandles::ref_kind_has_receiver(ref_kind); |
| } else if (iid == vmIntrinsics::_invokeBasic) { |
| has_receiver = true; |
| } else { |
| fatal("unexpected intrinsic id %d", iid); |
| } |
| |
| if (member_reg != noreg) { |
| // Load the member_arg into register, if necessary. |
| SharedRuntime::check_member_name_argument_is_last_argument(method, sig_bt, regs); |
| VMReg r = regs[member_arg_pos].first(); |
| if (r->is_stack()) { |
| __ movptr(member_reg, Address(rsp, r->reg2stack() * VMRegImpl::stack_slot_size + wordSize)); |
| } else { |
| // no data motion is needed |
| member_reg = r->as_Register(); |
| } |
| } |
| |
| if (has_receiver) { |
| // Make sure the receiver is loaded into a register. |
| assert(method->size_of_parameters() > 0, "oob"); |
| assert(sig_bt[0] == T_OBJECT, "receiver argument must be an object"); |
| VMReg r = regs[0].first(); |
| assert(r->is_valid(), "bad receiver arg"); |
| if (r->is_stack()) { |
| // Porting note: This assumes that compiled calling conventions always |
| // pass the receiver oop in a register. If this is not true on some |
| // platform, pick a temp and load the receiver from stack. |
| fatal("receiver always in a register"); |
| receiver_reg = j_rarg0; // known to be free at this point |
| __ movptr(receiver_reg, Address(rsp, r->reg2stack() * VMRegImpl::stack_slot_size + wordSize)); |
| } else { |
| // no data motion is needed |
| receiver_reg = r->as_Register(); |
| } |
| } |
| |
| // Figure out which address we are really jumping to: |
| MethodHandles::generate_method_handle_dispatch(masm, iid, |
| receiver_reg, member_reg, /*for_compiler_entry:*/ true); |
| } |
| |
| // --------------------------------------------------------------------------- |
| // Generate a native wrapper for a given method. The method takes arguments |
| // in the Java compiled code convention, marshals them to the native |
| // convention (handlizes oops, etc), transitions to native, makes the call, |
| // returns to java state (possibly blocking), unhandlizes any result and |
| // returns. |
| // |
| // Critical native functions are a shorthand for the use of |
| // GetPrimtiveArrayCritical and disallow the use of any other JNI |
| // functions. The wrapper is expected to unpack the arguments before |
| // passing them to the callee and perform checks before and after the |
| // native call to ensure that they GCLocker |
| // lock_critical/unlock_critical semantics are followed. Some other |
| // parts of JNI setup are skipped like the tear down of the JNI handle |
| // block and the check for pending exceptions it's impossible for them |
| // to be thrown. |
| // |
| // They are roughly structured like this: |
| // if (GCLocker::needs_gc()) |
| // SharedRuntime::block_for_jni_critical(); |
| // tranistion to thread_in_native |
| // unpack arrray arguments and call native entry point |
| // check for safepoint in progress |
| // check if any thread suspend flags are set |
| // call into JVM and possible unlock the JNI critical |
| // if a GC was suppressed while in the critical native. |
| // transition back to thread_in_Java |
| // return to caller |
| // |
| nmethod* SharedRuntime::generate_native_wrapper(MacroAssembler* masm, |
| const methodHandle& method, |
| int compile_id, |
| BasicType* in_sig_bt, |
| VMRegPair* in_regs, |
| BasicType ret_type) { |
| if (method->is_method_handle_intrinsic()) { |
| vmIntrinsics::ID iid = method->intrinsic_id(); |
| intptr_t start = (intptr_t)__ pc(); |
| int vep_offset = ((intptr_t)__ pc()) - start; |
| gen_special_dispatch(masm, |
| method, |
| in_sig_bt, |
| in_regs); |
| int frame_complete = ((intptr_t)__ pc()) - start; // not complete, period |
| __ flush(); |
| int stack_slots = SharedRuntime::out_preserve_stack_slots(); // no out slots at all, actually |
| return nmethod::new_native_nmethod(method, |
| compile_id, |
| masm->code(), |
| vep_offset, |
| frame_complete, |
| stack_slots / VMRegImpl::slots_per_word, |
| in_ByteSize(-1), |
| in_ByteSize(-1), |
| (OopMapSet*)NULL); |
| } |
| bool is_critical_native = true; |
| address native_func = method->critical_native_function(); |
| if (native_func == NULL) { |
| native_func = method->native_function(); |
| is_critical_native = false; |
| } |
| assert(native_func != NULL, "must have function"); |
| |
| // An OopMap for lock (and class if static) |
| OopMapSet *oop_maps = new OopMapSet(); |
| intptr_t start = (intptr_t)__ pc(); |
| |
| // We have received a description of where all the java arg are located |
| // on entry to the wrapper. We need to convert these args to where |
| // the jni function will expect them. To figure out where they go |
| // we convert the java signature to a C signature by inserting |
| // the hidden arguments as arg[0] and possibly arg[1] (static method) |
| |
| const int total_in_args = method->size_of_parameters(); |
| int total_c_args = total_in_args; |
| if (!is_critical_native) { |
| total_c_args += 1; |
| if (method->is_static()) { |
| total_c_args++; |
| } |
| } else { |
| for (int i = 0; i < total_in_args; i++) { |
| if (in_sig_bt[i] == T_ARRAY) { |
| total_c_args++; |
| } |
| } |
| } |
| |
| BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args); |
| VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args); |
| BasicType* in_elem_bt = NULL; |
| |
| int argc = 0; |
| if (!is_critical_native) { |
| out_sig_bt[argc++] = T_ADDRESS; |
| if (method->is_static()) { |
| out_sig_bt[argc++] = T_OBJECT; |
| } |
| |
| for (int i = 0; i < total_in_args ; i++ ) { |
| out_sig_bt[argc++] = in_sig_bt[i]; |
| } |
| } else { |
| Thread* THREAD = Thread::current(); |
| in_elem_bt = NEW_RESOURCE_ARRAY(BasicType, total_in_args); |
| SignatureStream ss(method->signature()); |
| for (int i = 0; i < total_in_args ; i++ ) { |
| if (in_sig_bt[i] == T_ARRAY) { |
| // Arrays are passed as int, elem* pair |
| out_sig_bt[argc++] = T_INT; |
| out_sig_bt[argc++] = T_ADDRESS; |
| Symbol* atype = ss.as_symbol(CHECK_NULL); |
| const char* at = atype->as_C_string(); |
| if (strlen(at) == 2) { |
| assert(at[0] == '[', "must be"); |
| switch (at[1]) { |
| case 'B': in_elem_bt[i] = T_BYTE; break; |
| case 'C': in_elem_bt[i] = T_CHAR; break; |
| case 'D': in_elem_bt[i] = T_DOUBLE; break; |
| case 'F': in_elem_bt[i] = T_FLOAT; break; |
| case 'I': in_elem_bt[i] = T_INT; break; |
| case 'J': in_elem_bt[i] = T_LONG; break; |
| case 'S': in_elem_bt[i] = T_SHORT; break; |
| case 'Z': in_elem_bt[i] = T_BOOLEAN; break; |
| default: ShouldNotReachHere(); |
| } |
| } |
| } else { |
| out_sig_bt[argc++] = in_sig_bt[i]; |
| in_elem_bt[i] = T_VOID; |
| } |
| if (in_sig_bt[i] != T_VOID) { |
| assert(in_sig_bt[i] == ss.type(), "must match"); |
| ss.next(); |
| } |
| } |
| } |
| |
| // Now figure out where the args must be stored and how much stack space |
| // they require. |
| int out_arg_slots; |
| out_arg_slots = c_calling_convention(out_sig_bt, out_regs, NULL, total_c_args); |
| |
| // Compute framesize for the wrapper. We need to handlize all oops in |
| // incoming registers |
| |
| // Calculate the total number of stack slots we will need. |
| |
| // First count the abi requirement plus all of the outgoing args |
| int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; |
| |
| // Now the space for the inbound oop handle area |
| int total_save_slots = 6 * VMRegImpl::slots_per_word; // 6 arguments passed in registers |
| if (is_critical_native) { |
| // Critical natives may have to call out so they need a save area |
| // for register arguments. |
| int double_slots = 0; |
| int single_slots = 0; |
| for ( int i = 0; i < total_in_args; i++) { |
| if (in_regs[i].first()->is_Register()) { |
| const Register reg = in_regs[i].first()->as_Register(); |
| switch (in_sig_bt[i]) { |
| case T_BOOLEAN: |
| case T_BYTE: |
| case T_SHORT: |
| case T_CHAR: |
| case T_INT: single_slots++; break; |
| case T_ARRAY: // specific to LP64 (7145024) |
| case T_LONG: double_slots++; break; |
| default: ShouldNotReachHere(); |
| } |
| } else if (in_regs[i].first()->is_XMMRegister()) { |
| switch (in_sig_bt[i]) { |
| case T_FLOAT: single_slots++; break; |
| case T_DOUBLE: double_slots++; break; |
| default: ShouldNotReachHere(); |
| } |
| } else if (in_regs[i].first()->is_FloatRegister()) { |
| ShouldNotReachHere(); |
| } |
| } |
| total_save_slots = double_slots * 2 + single_slots; |
| // align the save area |
| if (double_slots != 0) { |
| stack_slots = round_to(stack_slots, 2); |
| } |
| } |
| |
| int oop_handle_offset = stack_slots; |
| stack_slots += total_save_slots; |
| |
| // Now any space we need for handlizing a klass if static method |
| |
| int klass_slot_offset = 0; |
| int klass_offset = -1; |
| int lock_slot_offset = 0; |
| bool is_static = false; |
| |
| if (method->is_static()) { |
| klass_slot_offset = stack_slots; |
| stack_slots += VMRegImpl::slots_per_word; |
| klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size; |
| is_static = true; |
| } |
| |
| // Plus a lock if needed |
| |
| if (method->is_synchronized()) { |
| lock_slot_offset = stack_slots; |
| stack_slots += VMRegImpl::slots_per_word; |
| } |
| |
| // Now a place (+2) to save return values or temp during shuffling |
| // + 4 for return address (which we own) and saved rbp |
| stack_slots += 6; |
| |
| // Ok The space we have allocated will look like: |
| // |
| // |
| // FP-> | | |
| // |---------------------| |
| // | 2 slots for moves | |
| // |---------------------| |
| // | lock box (if sync) | |
| // |---------------------| <- lock_slot_offset |
| // | klass (if static) | |
| // |---------------------| <- klass_slot_offset |
| // | oopHandle area | |
| // |---------------------| <- oop_handle_offset (6 java arg registers) |
| // | outbound memory | |
| // | based arguments | |
| // | | |
| // |---------------------| |
| // | | |
| // SP-> | out_preserved_slots | |
| // |
| // |
| |
| |
| // Now compute actual number of stack words we need rounding to make |
| // stack properly aligned. |
| stack_slots = round_to(stack_slots, StackAlignmentInSlots); |
| |
| int stack_size = stack_slots * VMRegImpl::stack_slot_size; |
| |
| // First thing make an ic check to see if we should even be here |
| |
| // We are free to use all registers as temps without saving them and |
| // restoring them except rbp. rbp is the only callee save register |
| // as far as the interpreter and the compiler(s) are concerned. |
| |
| |
| const Register ic_reg = rax; |
| const Register receiver = j_rarg0; |
| |
| Label hit; |
| Label exception_pending; |
| |
| assert_different_registers(ic_reg, receiver, rscratch1); |
| __ verify_oop(receiver); |
| __ load_klass(rscratch1, receiver); |
| __ cmpq(ic_reg, rscratch1); |
| __ jcc(Assembler::equal, hit); |
| |
| __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); |
| |
| // Verified entry point must be aligned |
| __ align(8); |
| |
| __ bind(hit); |
| |
| int vep_offset = ((intptr_t)__ pc()) - start; |
| |
| #ifdef COMPILER1 |
| // For Object.hashCode, System.identityHashCode try to pull hashCode from object header if available. |
| if ((InlineObjectHash && method->intrinsic_id() == vmIntrinsics::_hashCode) || (method->intrinsic_id() == vmIntrinsics::_identityHashCode)) { |
| inline_check_hashcode_from_object_header(masm, method, j_rarg0 /*obj_reg*/, rax /*result*/); |
| } |
| #endif // COMPILER1 |
| |
| // The instruction at the verified entry point must be 5 bytes or longer |
| // because it can be patched on the fly by make_non_entrant. The stack bang |
| // instruction fits that requirement. |
| |
| // Generate stack overflow check |
| |
| if (UseStackBanging) { |
| __ bang_stack_with_offset((int)JavaThread::stack_shadow_zone_size()); |
| } else { |
| // need a 5 byte instruction to allow MT safe patching to non-entrant |
| __ fat_nop(); |
| } |
| |
| // Generate a new frame for the wrapper. |
| __ enter(); |
| // -2 because return address is already present and so is saved rbp |
| __ subptr(rsp, stack_size - 2*wordSize); |
| |
| // Frame is now completed as far as size and linkage. |
| int frame_complete = ((intptr_t)__ pc()) - start; |
| |
| if (UseRTMLocking) { |
| // Abort RTM transaction before calling JNI |
| // because critical section will be large and will be |
| // aborted anyway. Also nmethod could be deoptimized. |
| __ xabort(0); |
| } |
| |
| #ifdef ASSERT |
| { |
| Label L; |
| __ mov(rax, rsp); |
| __ andptr(rax, -16); // must be 16 byte boundary (see amd64 ABI) |
| __ cmpptr(rax, rsp); |
| __ jcc(Assembler::equal, L); |
| __ stop("improperly aligned stack"); |
| __ bind(L); |
| } |
| #endif /* ASSERT */ |
| |
| |
| // We use r14 as the oop handle for the receiver/klass |
| // It is callee save so it survives the call to native |
| |
| const Register oop_handle_reg = r14; |
| |
| if (is_critical_native) { |
| check_needs_gc_for_critical_native(masm, stack_slots, total_c_args, total_in_args, |
| oop_handle_offset, oop_maps, in_regs, in_sig_bt); |
| } |
| |
| // |
| // We immediately shuffle the arguments so that any vm call we have to |
| // make from here on out (sync slow path, jvmti, etc.) we will have |
| // captured the oops from our caller and have a valid oopMap for |
| // them. |
| |
| // ----------------- |
| // The Grand Shuffle |
| |
| // The Java calling convention is either equal (linux) or denser (win64) than the |
| // c calling convention. However the because of the jni_env argument the c calling |
| // convention always has at least one more (and two for static) arguments than Java. |
| // Therefore if we move the args from java -> c backwards then we will never have |
| // a register->register conflict and we don't have to build a dependency graph |
| // and figure out how to break any cycles. |
| // |
| |
| // Record esp-based slot for receiver on stack for non-static methods |
| int receiver_offset = -1; |
| |
| // This is a trick. We double the stack slots so we can claim |
| // the oops in the caller's frame. Since we are sure to have |
| // more args than the caller doubling is enough to make |
| // sure we can capture all the incoming oop args from the |
| // caller. |
| // |
| OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); |
| |
| // Mark location of rbp (someday) |
| // map->set_callee_saved(VMRegImpl::stack2reg( stack_slots - 2), stack_slots * 2, 0, vmreg(rbp)); |
| |
| // Use eax, ebx as temporaries during any memory-memory moves we have to do |
| // All inbound args are referenced based on rbp and all outbound args via rsp. |
| |
| |
| #ifdef ASSERT |
| bool reg_destroyed[RegisterImpl::number_of_registers]; |
| bool freg_destroyed[XMMRegisterImpl::number_of_registers]; |
| for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { |
| reg_destroyed[r] = false; |
| } |
| for ( int f = 0 ; f < XMMRegisterImpl::number_of_registers ; f++ ) { |
| freg_destroyed[f] = false; |
| } |
| |
| #endif /* ASSERT */ |
| |
| // This may iterate in two different directions depending on the |
| // kind of native it is. The reason is that for regular JNI natives |
| // the incoming and outgoing registers are offset upwards and for |
| // critical natives they are offset down. |
| GrowableArray<int> arg_order(2 * total_in_args); |
| VMRegPair tmp_vmreg; |
| tmp_vmreg.set1(rbx->as_VMReg()); |
| |
| if (!is_critical_native) { |
| for (int i = total_in_args - 1, c_arg = total_c_args - 1; i >= 0; i--, c_arg--) { |
| arg_order.push(i); |
| arg_order.push(c_arg); |
| } |
| } else { |
| // Compute a valid move order, using tmp_vmreg to break any cycles |
| ComputeMoveOrder cmo(total_in_args, in_regs, total_c_args, out_regs, in_sig_bt, arg_order, tmp_vmreg); |
| } |
| |
| int temploc = -1; |
| for (int ai = 0; ai < arg_order.length(); ai += 2) { |
| int i = arg_order.at(ai); |
| int c_arg = arg_order.at(ai + 1); |
| __ block_comment(err_msg("move %d -> %d", i, c_arg)); |
| if (c_arg == -1) { |
| assert(is_critical_native, "should only be required for critical natives"); |
| // This arg needs to be moved to a temporary |
| __ mov(tmp_vmreg.first()->as_Register(), in_regs[i].first()->as_Register()); |
| in_regs[i] = tmp_vmreg; |
| temploc = i; |
| continue; |
| } else if (i == -1) { |
| assert(is_critical_native, "should only be required for critical natives"); |
| // Read from the temporary location |
| assert(temploc != -1, "must be valid"); |
| i = temploc; |
| temploc = -1; |
| } |
| #ifdef ASSERT |
| if (in_regs[i].first()->is_Register()) { |
| assert(!reg_destroyed[in_regs[i].first()->as_Register()->encoding()], "destroyed reg!"); |
| } else if (in_regs[i].first()->is_XMMRegister()) { |
| assert(!freg_destroyed[in_regs[i].first()->as_XMMRegister()->encoding()], "destroyed reg!"); |
| } |
| if (out_regs[c_arg].first()->is_Register()) { |
| reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; |
| } else if (out_regs[c_arg].first()->is_XMMRegister()) { |
| freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true; |
| } |
| #endif /* ASSERT */ |
| switch (in_sig_bt[i]) { |
| case T_ARRAY: |
| if (is_critical_native) { |
| unpack_array_argument(masm, in_regs[i], in_elem_bt[i], out_regs[c_arg + 1], out_regs[c_arg]); |
| c_arg++; |
| #ifdef ASSERT |
| if (out_regs[c_arg].first()->is_Register()) { |
| reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; |
| } else if (out_regs[c_arg].first()->is_XMMRegister()) { |
| freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true; |
| } |
| #endif |
| break; |
| } |
| case T_OBJECT: |
| assert(!is_critical_native, "no oop arguments"); |
| object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg], |
| ((i == 0) && (!is_static)), |
| &receiver_offset); |
| break; |
| case T_VOID: |
| break; |
| |
| case T_FLOAT: |
| float_move(masm, in_regs[i], out_regs[c_arg]); |
| break; |
| |
| case T_DOUBLE: |
| assert( i + 1 < total_in_args && |
| in_sig_bt[i + 1] == T_VOID && |
| out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); |
| double_move(masm, in_regs[i], out_regs[c_arg]); |
| break; |
| |
| case T_LONG : |
| long_move(masm, in_regs[i], out_regs[c_arg]); |
| break; |
| |
| case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); |
| |
| default: |
| move32_64(masm, in_regs[i], out_regs[c_arg]); |
| } |
| } |
| |
| int c_arg; |
| |
| // Pre-load a static method's oop into r14. Used both by locking code and |
| // the normal JNI call code. |
| if (!is_critical_native) { |
| // point c_arg at the first arg that is already loaded in case we |
| // need to spill before we call out |
| c_arg = total_c_args - total_in_args; |
| |
| if (method->is_static()) { |
| |
| // load oop into a register |
| __ movoop(oop_handle_reg, JNIHandles::make_local(method->method_holder()->java_mirror())); |
| |
| // Now handlize the static class mirror it's known not-null. |
| __ movptr(Address(rsp, klass_offset), oop_handle_reg); |
| map->set_oop(VMRegImpl::stack2reg(klass_slot_offset)); |
| |
| // Now get the handle |
| __ lea(oop_handle_reg, Address(rsp, klass_offset)); |
| // store the klass handle as second argument |
| __ movptr(c_rarg1, oop_handle_reg); |
| // and protect the arg if we must spill |
| c_arg--; |
| } |
| } else { |
| // For JNI critical methods we need to save all registers in save_args. |
| c_arg = 0; |
| } |
| |
| // Change state to native (we save the return address in the thread, since it might not |
| // be pushed on the stack when we do a a stack traversal). It is enough that the pc() |
| // points into the right code segment. It does not have to be the correct return pc. |
| // We use the same pc/oopMap repeatedly when we call out |
| |
| intptr_t the_pc = (intptr_t) __ pc(); |
| oop_maps->add_gc_map(the_pc - start, map); |
| |
| __ set_last_Java_frame(rsp, noreg, (address)the_pc); |
| |
| |
| // We have all of the arguments setup at this point. We must not touch any register |
| // argument registers at this point (what if we save/restore them there are no oop? |
| |
| { |
| SkipIfEqual skip(masm, &DTraceMethodProbes, false); |
| // protect the args we've loaded |
| save_args(masm, total_c_args, c_arg, out_regs); |
| __ mov_metadata(c_rarg1, method()); |
| __ call_VM_leaf( |
| CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), |
| r15_thread, c_rarg1); |
| restore_args(masm, total_c_args, c_arg, out_regs); |
| } |
| |
| // RedefineClasses() tracing support for obsolete method entry |
| if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
| // protect the args we've loaded |
| save_args(masm, total_c_args, c_arg, out_regs); |
| __ mov_metadata(c_rarg1, method()); |
| __ call_VM_leaf( |
| CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
| r15_thread, c_rarg1); |
| restore_args(masm, total_c_args, c_arg, out_regs); |
| } |
| |
| // Lock a synchronized method |
| |
| // Register definitions used by locking and unlocking |
| |
| const Register swap_reg = rax; // Must use rax for cmpxchg instruction |
| const Register obj_reg = rbx; // Will contain the oop |
| const Register lock_reg = r13; // Address of compiler lock object (BasicLock) |
| const Register old_hdr = r13; // value of old header at unlock time |
| |
| Label slow_path_lock; |
| Label lock_done; |
| |
| if (method->is_synchronized()) { |
| assert(!is_critical_native, "unhandled"); |
| |
| |
| const int mark_word_offset = BasicLock::displaced_header_offset_in_bytes(); |
| |
| // Get the handle (the 2nd argument) |
| __ mov(oop_handle_reg, c_rarg1); |
| |
| // Get address of the box |
| |
| __ lea(lock_reg, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
| |
| // Load the oop from the handle |
| __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
| |
| if (UseBiasedLocking) { |
| __ biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, lock_done, &slow_path_lock); |
| } |
| |
| // Load immediate 1 into swap_reg %rax |
| __ movl(swap_reg, 1); |
| |
| // Load (object->mark() | 1) into swap_reg %rax |
| __ orptr(swap_reg, Address(obj_reg, 0)); |
| |
| // Save (object->mark() | 1) into BasicLock's displaced header |
| __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
| |
| if (os::is_MP()) { |
| __ lock(); |
| } |
| |
| // src -> dest iff dest == rax else rax <- dest |
| __ cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
| __ jcc(Assembler::equal, lock_done); |
| |
| // Hmm should this move to the slow path code area??? |
| |
| // Test if the oopMark is an obvious stack pointer, i.e., |
| // 1) (mark & 3) == 0, and |
| // 2) rsp <= mark < mark + os::pagesize() |
| // These 3 tests can be done by evaluating the following |
| // expression: ((mark - rsp) & (3 - os::vm_page_size())), |
| // assuming both stack pointer and pagesize have their |
| // least significant 2 bits clear. |
| // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg |
| |
| __ subptr(swap_reg, rsp); |
| __ andptr(swap_reg, 3 - os::vm_page_size()); |
| |
| // Save the test result, for recursive case, the result is zero |
| __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
| __ jcc(Assembler::notEqual, slow_path_lock); |
| |
| // Slow path will re-enter here |
| |
| __ bind(lock_done); |
| } |
| |
| |
| // Finally just about ready to make the JNI call |
| |
| |
| // get JNIEnv* which is first argument to native |
| if (!is_critical_native) { |
| __ lea(c_rarg0, Address(r15_thread, in_bytes(JavaThread::jni_environment_offset()))); |
| } |
| |
| // Now set thread in native |
| __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native); |
| |
| __ call(RuntimeAddress(native_func)); |
| |
| // Verify or restore cpu control state after JNI call |
| __ restore_cpu_control_state_after_jni(); |
| |
| // Unpack native results. |
| switch (ret_type) { |
| case T_BOOLEAN: __ c2bool(rax); break; |
| case T_CHAR : __ movzwl(rax, rax); break; |
| case T_BYTE : __ sign_extend_byte (rax); break; |
| case T_SHORT : __ sign_extend_short(rax); break; |
| case T_INT : /* nothing to do */ break; |
| case T_DOUBLE : |
| case T_FLOAT : |
| // Result is in xmm0 we'll save as needed |
| break; |
| case T_ARRAY: // Really a handle |
| case T_OBJECT: // Really a handle |
| break; // can't de-handlize until after safepoint check |
| case T_VOID: break; |
| case T_LONG: break; |
| default : ShouldNotReachHere(); |
| } |
| |
| // 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. |
| __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native_trans); |
| |
| if(os::is_MP()) { |
| if (UseMembar) { |
| // Force this write out before the read below |
| __ membar(Assembler::Membar_mask_bits( |
| Assembler::LoadLoad | Assembler::LoadStore | |
| Assembler::StoreLoad | Assembler::StoreStore)); |
| } else { |
| // Write serialization page so VM thread can do a pseudo remote membar. |
| // We use the current thread pointer to calculate a thread specific |
| // offset to write to within the page. This minimizes bus traffic |
| // due to cache line collision. |
| __ serialize_memory(r15_thread, rcx); |
| } |
| } |
| |
| Label after_transition; |
| |
| // check for safepoint operation in progress and/or pending suspend requests |
| { |
| Label Continue; |
| |
| __ cmp32(ExternalAddress((address)SafepointSynchronize::address_of_state()), |
| SafepointSynchronize::_not_synchronized); |
| |
| Label L; |
| __ jcc(Assembler::notEqual, L); |
| __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0); |
| __ jcc(Assembler::equal, Continue); |
| __ bind(L); |
| |
| // Don't use call_VM as it will see a possible pending exception and forward it |
| // and never return here preventing us from clearing _last_native_pc down below. |
| // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are |
| // preserved and correspond to the bcp/locals pointers. So we do a runtime call |
| // by hand. |
| // |
| save_native_result(masm, ret_type, stack_slots); |
| __ mov(c_rarg0, r15_thread); |
| __ mov(r12, rsp); // remember sp |
| __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows |
| __ andptr(rsp, -16); // align stack as required by ABI |
| if (!is_critical_native) { |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); |
| } else { |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans_and_transition))); |
| } |
| __ mov(rsp, r12); // restore sp |
| __ reinit_heapbase(); |
| // Restore any method result value |
| restore_native_result(masm, ret_type, stack_slots); |
| |
| if (is_critical_native) { |
| // The call above performed the transition to thread_in_Java so |
| // skip the transition logic below. |
| __ jmpb(after_transition); |
| } |
| |
| __ bind(Continue); |
| } |
| |
| // change thread state |
| __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java); |
| __ bind(after_transition); |
| |
| Label reguard; |
| Label reguard_done; |
| __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_reserved_disabled); |
| __ jcc(Assembler::equal, reguard); |
| __ bind(reguard_done); |
| |
| // native result if any is live |
| |
| // Unlock |
| Label unlock_done; |
| Label slow_path_unlock; |
| if (method->is_synchronized()) { |
| |
| // Get locked oop from the handle we passed to jni |
| __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
| |
| Label done; |
| |
| if (UseBiasedLocking) { |
| __ biased_locking_exit(obj_reg, old_hdr, done); |
| } |
| |
| // Simple recursive lock? |
| |
| __ cmpptr(Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size), (int32_t)NULL_WORD); |
| __ jcc(Assembler::equal, done); |
| |
| // Must save rax if if it is live now because cmpxchg must use it |
| if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { |
| save_native_result(masm, ret_type, stack_slots); |
| } |
| |
| |
| // get address of the stack lock |
| __ lea(rax, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
| // get old displaced header |
| __ movptr(old_hdr, Address(rax, 0)); |
| |
| // Atomic swap old header if oop still contains the stack lock |
| if (os::is_MP()) { |
| __ lock(); |
| } |
| __ cmpxchgptr(old_hdr, Address(obj_reg, 0)); |
| __ jcc(Assembler::notEqual, slow_path_unlock); |
| |
| // slow path re-enters here |
| __ bind(unlock_done); |
| if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { |
| restore_native_result(masm, ret_type, stack_slots); |
| } |
| |
| __ bind(done); |
| |
| } |
| { |
| SkipIfEqual skip(masm, &DTraceMethodProbes, false); |
| save_native_result(masm, ret_type, stack_slots); |
| __ mov_metadata(c_rarg1, method()); |
| __ call_VM_leaf( |
| CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), |
| r15_thread, c_rarg1); |
| restore_native_result(masm, ret_type, stack_slots); |
| } |
| |
| __ reset_last_Java_frame(false, true); |
| |
| // Unpack oop result |
| if (ret_type == T_OBJECT || ret_type == T_ARRAY) { |
| Label L; |
| __ testptr(rax, rax); |
| __ jcc(Assembler::zero, L); |
| __ movptr(rax, Address(rax, 0)); |
| __ bind(L); |
| __ verify_oop(rax); |
| } |
| |
| if (!is_critical_native) { |
| // reset handle block |
| __ movptr(rcx, Address(r15_thread, JavaThread::active_handles_offset())); |
| __ movl(Address(rcx, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); |
| } |
| |
| // pop our frame |
| |
| __ leave(); |
| |
| if (!is_critical_native) { |
| // Any exception pending? |
| __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
| __ jcc(Assembler::notEqual, exception_pending); |
| } |
| |
| // Return |
| |
| __ ret(0); |
| |
| // Unexpected paths are out of line and go here |
| |
| if (!is_critical_native) { |
| // forward the exception |
| __ bind(exception_pending); |
| |
| // and forward the exception |
| __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
| } |
| |
| // Slow path locking & unlocking |
| if (method->is_synchronized()) { |
| |
| // BEGIN Slow path lock |
| __ bind(slow_path_lock); |
| |
| // has last_Java_frame setup. No exceptions so do vanilla call not call_VM |
| // args are (oop obj, BasicLock* lock, JavaThread* thread) |
| |
| // protect the args we've loaded |
| save_args(masm, total_c_args, c_arg, out_regs); |
| |
| __ mov(c_rarg0, obj_reg); |
| __ mov(c_rarg1, lock_reg); |
| __ mov(c_rarg2, r15_thread); |
| |
| // Not a leaf but we have last_Java_frame setup as we want |
| __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C), 3); |
| restore_args(masm, total_c_args, c_arg, out_regs); |
| |
| #ifdef ASSERT |
| { Label L; |
| __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
| __ jcc(Assembler::equal, L); |
| __ stop("no pending exception allowed on exit from monitorenter"); |
| __ bind(L); |
| } |
| #endif |
| __ jmp(lock_done); |
| |
| // END Slow path lock |
| |
| // BEGIN Slow path unlock |
| __ bind(slow_path_unlock); |
| |
| // If we haven't already saved the native result we must save it now as xmm registers |
| // are still exposed. |
| |
| if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { |
| save_native_result(masm, ret_type, stack_slots); |
| } |
| |
| __ lea(c_rarg1, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
| |
| __ mov(c_rarg0, obj_reg); |
| __ mov(c_rarg2, r15_thread); |
| __ mov(r12, rsp); // remember sp |
| __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows |
| __ andptr(rsp, -16); // align stack as required by ABI |
| |
| // Save pending exception around call to VM (which contains an EXCEPTION_MARK) |
| // NOTE that obj_reg == rbx currently |
| __ movptr(rbx, Address(r15_thread, in_bytes(Thread::pending_exception_offset()))); |
| __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
| |
| // args are (oop obj, BasicLock* lock, JavaThread* thread) |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C))); |
| __ mov(rsp, r12); // restore sp |
| __ reinit_heapbase(); |
| #ifdef ASSERT |
| { |
| Label L; |
| __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int)NULL_WORD); |
| __ jcc(Assembler::equal, L); |
| __ stop("no pending exception allowed on exit complete_monitor_unlocking_C"); |
| __ bind(L); |
| } |
| #endif /* ASSERT */ |
| |
| __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), rbx); |
| |
| if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { |
| restore_native_result(masm, ret_type, stack_slots); |
| } |
| __ jmp(unlock_done); |
| |
| // END Slow path unlock |
| |
| } // synchronized |
| |
| // SLOW PATH Reguard the stack if needed |
| |
| __ bind(reguard); |
| save_native_result(masm, ret_type, stack_slots); |
| __ mov(r12, rsp); // remember sp |
| __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows |
| __ andptr(rsp, -16); // align stack as required by ABI |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); |
| __ mov(rsp, r12); // restore sp |
| __ reinit_heapbase(); |
| restore_native_result(masm, ret_type, stack_slots); |
| // and continue |
| __ jmp(reguard_done); |
| |
| |
| |
| __ flush(); |
| |
| nmethod *nm = nmethod::new_native_nmethod(method, |
| compile_id, |
| masm->code(), |
| vep_offset, |
| frame_complete, |
| stack_slots / VMRegImpl::slots_per_word, |
| (is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)), |
| in_ByteSize(lock_slot_offset*VMRegImpl::stack_slot_size), |
| oop_maps); |
| |
| if (is_critical_native) { |
| nm->set_lazy_critical_native(true); |
| } |
| |
| return nm; |
| |
| } |
| |
| // this function returns the adjust size (in number of words) to a c2i adapter |
| // activation for use during deoptimization |
| int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals ) { |
| return (callee_locals - callee_parameters) * Interpreter::stackElementWords; |
| } |
| |
| |
| uint SharedRuntime::out_preserve_stack_slots() { |
| return 0; |
| } |
| |
| //------------------------------generate_deopt_blob---------------------------- |
| void SharedRuntime::generate_deopt_blob() { |
| // Allocate space for the code |
| ResourceMark rm; |
| // Setup code generation tools |
| int pad = 0; |
| #if INCLUDE_JVMCI |
| if (EnableJVMCI) { |
| pad += 512; // Increase the buffer size when compiling for JVMCI |
| } |
| #endif |
| CodeBuffer buffer("deopt_blob", 2048+pad, 1024); |
| MacroAssembler* masm = new MacroAssembler(&buffer); |
| int frame_size_in_words; |
| OopMap* map = NULL; |
| OopMapSet *oop_maps = new OopMapSet(); |
| |
| // ------------- |
| // This code enters when returning to a de-optimized nmethod. A return |
| // address has been pushed on the the stack, and return values are in |
| // registers. |
| // If we are doing a normal deopt then we were called from the patched |
| // nmethod from the point we returned to the nmethod. So the return |
| // address on the stack is wrong by NativeCall::instruction_size |
| // We will adjust the value so it looks like we have the original return |
| // address on the stack (like when we eagerly deoptimized). |
| // In the case of an exception pending when deoptimizing, we enter |
| // with a return address on the stack that points after the call we patched |
| // into the exception handler. We have the following register state from, |
| // e.g., the forward exception stub (see stubGenerator_x86_64.cpp). |
| // rax: exception oop |
| // rbx: exception handler |
| // rdx: throwing pc |
| // So in this case we simply jam rdx into the useless return address and |
| // the stack looks just like we want. |
| // |
| // At this point we need to de-opt. We save the argument return |
| // registers. We call the first C routine, fetch_unroll_info(). This |
| // routine captures the return values and returns a structure which |
| // describes the current frame size and the sizes of all replacement frames. |
| // The current frame is compiled code and may contain many inlined |
| // functions, each with their own JVM state. We pop the current frame, then |
| // push all the new frames. Then we call the C routine unpack_frames() to |
| // populate these frames. Finally unpack_frames() returns us the new target |
| // address. Notice that callee-save registers are BLOWN here; they have |
| // already been captured in the vframeArray at the time the return PC was |
| // patched. |
| address start = __ pc(); |
| Label cont; |
| |
| // Prolog for non exception case! |
| |
| // Save everything in sight. |
| map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); |
| |
| // Normal deoptimization. Save exec mode for unpack_frames. |
| __ movl(r14, Deoptimization::Unpack_deopt); // callee-saved |
| __ jmp(cont); |
| |
| int reexecute_offset = __ pc() - start; |
| #if INCLUDE_JVMCI && !defined(COMPILER1) |
| if (EnableJVMCI && UseJVMCICompiler) { |
| // JVMCI does not use this kind of deoptimization |
| __ should_not_reach_here(); |
| } |
| #endif |
| |
| // Reexecute case |
| // return address is the pc describes what bci to do re-execute at |
| |
| // No need to update map as each call to save_live_registers will produce identical oopmap |
| (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); |
| |
| __ movl(r14, Deoptimization::Unpack_reexecute); // callee-saved |
| __ jmp(cont); |
| |
| #if INCLUDE_JVMCI |
| Label after_fetch_unroll_info_call; |
| int implicit_exception_uncommon_trap_offset = 0; |
| int uncommon_trap_offset = 0; |
| |
| if (EnableJVMCI) { |
| implicit_exception_uncommon_trap_offset = __ pc() - start; |
| |
| __ pushptr(Address(r15_thread, in_bytes(JavaThread::jvmci_implicit_exception_pc_offset()))); |
| __ movptr(Address(r15_thread, in_bytes(JavaThread::jvmci_implicit_exception_pc_offset())), (int32_t)NULL_WORD); |
| |
| uncommon_trap_offset = __ pc() - start; |
| |
| // Save everything in sight. |
| RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); |
| // fetch_unroll_info needs to call last_java_frame() |
| __ set_last_Java_frame(noreg, noreg, NULL); |
| |
| __ movl(c_rarg1, Address(r15_thread, in_bytes(JavaThread::pending_deoptimization_offset()))); |
| __ movl(Address(r15_thread, in_bytes(JavaThread::pending_deoptimization_offset())), -1); |
| |
| __ movl(r14, (int32_t)Deoptimization::Unpack_reexecute); |
| __ mov(c_rarg0, r15_thread); |
| __ movl(c_rarg2, r14); // exec mode |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); |
| oop_maps->add_gc_map( __ pc()-start, map->deep_copy()); |
| |
| __ reset_last_Java_frame(false, false); |
| |
| __ jmp(after_fetch_unroll_info_call); |
| } // EnableJVMCI |
| #endif // INCLUDE_JVMCI |
| |
| int exception_offset = __ pc() - start; |
| |
| // Prolog for exception case |
| |
| // all registers are dead at this entry point, except for rax, and |
| // rdx which contain the exception oop and exception pc |
| // respectively. Set them in TLS and fall thru to the |
| // unpack_with_exception_in_tls entry point. |
| |
| __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); |
| __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), rax); |
| |
| int exception_in_tls_offset = __ pc() - start; |
| |
| // new implementation because exception oop is now passed in JavaThread |
| |
| // Prolog for exception case |
| // All registers must be preserved because they might be used by LinearScan |
| // Exceptiop oop and throwing PC are passed in JavaThread |
| // tos: stack at point of call to method that threw the exception (i.e. only |
| // args are on the stack, no return address) |
| |
| // make room on stack for the return address |
| // It will be patched later with the throwing pc. The correct value is not |
| // available now because loading it from memory would destroy registers. |
| __ push(0); |
| |
| // Save everything in sight. |
| map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); |
| |
| // Now it is safe to overwrite any register |
| |
| // Deopt during an exception. Save exec mode for unpack_frames. |
| __ movl(r14, Deoptimization::Unpack_exception); // callee-saved |
| |
| // load throwing pc from JavaThread and patch it as the return address |
| // of the current frame. Then clear the field in JavaThread |
| |
| __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); |
| __ movptr(Address(rbp, wordSize), rdx); |
| __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); |
| |
| #ifdef ASSERT |
| // verify that there is really an exception oop in JavaThread |
| __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); |
| __ verify_oop(rax); |
| |
| // verify that there is no pending exception |
| Label no_pending_exception; |
| __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); |
| __ testptr(rax, rax); |
| __ jcc(Assembler::zero, no_pending_exception); |
| __ stop("must not have pending exception here"); |
| __ bind(no_pending_exception); |
| #endif |
| |
| __ bind(cont); |
| |
| // Call C code. Need thread and this frame, but NOT official VM entry |
| // crud. We cannot block on this call, no GC can happen. |
| // |
| // UnrollBlock* fetch_unroll_info(JavaThread* thread) |
| |
| // fetch_unroll_info needs to call last_java_frame(). |
| |
| __ set_last_Java_frame(noreg, noreg, NULL); |
| #ifdef ASSERT |
| { Label L; |
| __ cmpptr(Address(r15_thread, |
| JavaThread::last_Java_fp_offset()), |
| (int32_t)0); |
| __ jcc(Assembler::equal, L); |
| __ stop("SharedRuntime::generate_deopt_blob: last_Java_fp not cleared"); |
| __ bind(L); |
| } |
| #endif // ASSERT |
| __ mov(c_rarg0, r15_thread); |
| __ movl(c_rarg1, r14); // exec_mode |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info))); |
| |
| // Need to have an oopmap that tells fetch_unroll_info where to |
| // find any register it might need. |
| oop_maps->add_gc_map(__ pc() - start, map); |
| |
| __ reset_last_Java_frame(false, false); |
| |
| #if INCLUDE_JVMCI |
| if (EnableJVMCI) { |
| __ bind(after_fetch_unroll_info_call); |
| } |
| #endif |
| |
| // Load UnrollBlock* into rdi |
| __ mov(rdi, rax); |
| |
| __ movl(r14, Address(rdi, Deoptimization::UnrollBlock::unpack_kind_offset_in_bytes())); |
| Label noException; |
| __ cmpl(r14, Deoptimization::Unpack_exception); // Was exception pending? |
| __ jcc(Assembler::notEqual, noException); |
| __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); |
| // QQQ this is useless it was NULL above |
| __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); |
| __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD); |
| __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); |
| |
| __ verify_oop(rax); |
| |
| // Overwrite the result registers with the exception results. |
| __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); |
| // I think this is useless |
| __ movptr(Address(rsp, RegisterSaver::rdx_offset_in_bytes()), rdx); |
| |
| __ bind(noException); |
| |
| // Only register save data is on the stack. |
| // Now restore the result registers. Everything else is either dead |
| // or captured in the vframeArray. |
| RegisterSaver::restore_result_registers(masm); |
| |
| // All of the register save area has been popped of the stack. Only the |
| // return address remains. |
| |
| // Pop all the frames we must move/replace. |
| // |
| // Frame picture (youngest to oldest) |
| // 1: self-frame (no frame link) |
| // 2: deopting frame (no frame link) |
| // 3: caller of deopting frame (could be compiled/interpreted). |
| // |
| // Note: by leaving the return address of self-frame on the stack |
| // and using the size of frame 2 to adjust the stack |
| // when we are done the return to frame 3 will still be on the stack. |
| |
| // Pop deoptimized frame |
| __ movl(rcx, Address(rdi, Deoptimization::UnrollBlock::size_of_deoptimized_frame_offset_in_bytes())); |
| __ addptr(rsp, rcx); |
| |
| // rsp should be pointing at the return address to the caller (3) |
| |
| // Pick up the initial fp we should save |
| // restore rbp before stack bang because if stack overflow is thrown it needs to be pushed (and preserved) |
| __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_info_offset_in_bytes())); |
| |
| #ifdef ASSERT |
| // Compilers generate code that bang the stack by as much as the |
| // interpreter would need. So this stack banging should never |
| // trigger a fault. Verify that it does not on non product builds. |
| if (UseStackBanging) { |
| __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); |
| __ bang_stack_size(rbx, rcx); |
| } |
| #endif |
| |
| // Load address of array of frame pcs into rcx |
| __ movptr(rcx, Address(rdi, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); |
| |
| // Trash the old pc |
| __ addptr(rsp, wordSize); |
| |
| // Load address of array of frame sizes into rsi |
| __ movptr(rsi, Address(rdi, Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes())); |
| |
| // Load counter into rdx |
| __ movl(rdx, Address(rdi, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes())); |
| |
| // Now adjust the caller's stack to make up for the extra locals |
| // but record the original sp so that we can save it in the skeletal interpreter |
| // frame and the stack walking of interpreter_sender will get the unextended sp |
| // value and not the "real" sp value. |
| |
| const Register sender_sp = r8; |
| |
| __ mov(sender_sp, rsp); |
| __ movl(rbx, Address(rdi, |
| Deoptimization::UnrollBlock:: |
| caller_adjustment_offset_in_bytes())); |
| __ subptr(rsp, rbx); |
| |
| // Push interpreter frames in a loop |
| Label loop; |
| __ bind(loop); |
| __ movptr(rbx, Address(rsi, 0)); // Load frame size |
| __ subptr(rbx, 2*wordSize); // We'll push pc and ebp by hand |
| __ pushptr(Address(rcx, 0)); // Save return address |
| __ enter(); // Save old & set new ebp |
| __ subptr(rsp, rbx); // Prolog |
| // This value is corrected by layout_activation_impl |
| __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
| __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), sender_sp); // Make it walkable |
| __ mov(sender_sp, rsp); // Pass sender_sp to next frame |
| __ addptr(rsi, wordSize); // Bump array pointer (sizes) |
| __ addptr(rcx, wordSize); // Bump array pointer (pcs) |
| __ decrementl(rdx); // Decrement counter |
| __ jcc(Assembler::notZero, loop); |
| __ pushptr(Address(rcx, 0)); // Save final return address |
| |
| // Re-push self-frame |
| __ enter(); // Save old & set new ebp |
| |
| // Allocate a full sized register save area. |
| // Return address and rbp are in place, so we allocate two less words. |
| __ subptr(rsp, (frame_size_in_words - 2) * wordSize); |
| |
| // Restore frame locals after moving the frame |
| __ movdbl(Address(rsp, RegisterSaver::xmm0_offset_in_bytes()), xmm0); |
| __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); |
| |
| // Call C code. Need thread but NOT official VM entry |
| // crud. We cannot block on this call, no GC can happen. Call should |
| // restore return values to their stack-slots with the new SP. |
| // |
| // void Deoptimization::unpack_frames(JavaThread* thread, int exec_mode) |
| |
| // Use rbp because the frames look interpreted now |
| // Save "the_pc" since it cannot easily be retrieved using the last_java_SP after we aligned SP. |
| // Don't need the precise return PC here, just precise enough to point into this code blob. |
| address the_pc = __ pc(); |
| __ set_last_Java_frame(noreg, rbp, the_pc); |
| |
| __ andptr(rsp, -(StackAlignmentInBytes)); // Fix stack alignment as required by ABI |
| __ mov(c_rarg0, r15_thread); |
| __ movl(c_rarg1, r14); // second arg: exec_mode |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); |
| // Revert SP alignment after call since we're going to do some SP relative addressing below |
| __ movptr(rsp, Address(r15_thread, JavaThread::last_Java_sp_offset())); |
| |
| // Set an oopmap for the call site |
| // Use the same PC we used for the last java frame |
| oop_maps->add_gc_map(the_pc - start, |
| new OopMap( frame_size_in_words, 0 )); |
| |
| // Clear fp AND pc |
| __ reset_last_Java_frame(true, true); |
| |
| // Collect return values |
| __ movdbl(xmm0, Address(rsp, RegisterSaver::xmm0_offset_in_bytes())); |
| __ movptr(rax, Address(rsp, RegisterSaver::rax_offset_in_bytes())); |
| // I think this is useless (throwing pc?) |
| __ movptr(rdx, Address(rsp, RegisterSaver::rdx_offset_in_bytes())); |
| |
| // Pop self-frame. |
| __ leave(); // Epilog |
| |
| // Jump to interpreter |
| __ ret(0); |
| |
| // Make sure all code is generated |
| masm->flush(); |
| |
| _deopt_blob = DeoptimizationBlob::create(&buffer, oop_maps, 0, exception_offset, reexecute_offset, frame_size_in_words); |
| _deopt_blob->set_unpack_with_exception_in_tls_offset(exception_in_tls_offset); |
| #if INCLUDE_JVMCI |
| if (EnableJVMCI) { |
| _deopt_blob->set_uncommon_trap_offset(uncommon_trap_offset); |
| _deopt_blob->set_implicit_exception_uncommon_trap_offset(implicit_exception_uncommon_trap_offset); |
| } |
| #endif |
| } |
| |
| #ifdef COMPILER2 |
| //------------------------------generate_uncommon_trap_blob-------------------- |
| void SharedRuntime::generate_uncommon_trap_blob() { |
| // Allocate space for the code |
| ResourceMark rm; |
| // Setup code generation tools |
| CodeBuffer buffer("uncommon_trap_blob", 2048, 1024); |
| MacroAssembler* masm = new MacroAssembler(&buffer); |
| |
| assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); |
| |
| address start = __ pc(); |
| |
| if (UseRTMLocking) { |
| // Abort RTM transaction before possible nmethod deoptimization. |
| __ xabort(0); |
| } |
| |
| // Push self-frame. We get here with a return address on the |
| // stack, so rsp is 8-byte aligned until we allocate our frame. |
| __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog! |
| |
| // No callee saved registers. rbp is assumed implicitly saved |
| __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
| |
| // compiler left unloaded_class_index in j_rarg0 move to where the |
| // runtime expects it. |
| __ movl(c_rarg1, j_rarg0); |
| |
| __ set_last_Java_frame(noreg, noreg, NULL); |
| |
| // Call C code. Need thread but NOT official VM entry |
| // crud. We cannot block on this call, no GC can happen. Call should |
| // capture callee-saved registers as well as return values. |
| // Thread is in rdi already. |
| // |
| // UnrollBlock* uncommon_trap(JavaThread* thread, jint unloaded_class_index); |
| |
| __ mov(c_rarg0, r15_thread); |
| __ movl(c_rarg2, Deoptimization::Unpack_uncommon_trap); |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); |
| |
| // Set an oopmap for the call site |
| OopMapSet* oop_maps = new OopMapSet(); |
| OopMap* map = new OopMap(SimpleRuntimeFrame::framesize, 0); |
| |
| // location of rbp is known implicitly by the frame sender code |
| |
| oop_maps->add_gc_map(__ pc() - start, map); |
| |
| __ reset_last_Java_frame(false, false); |
| |
| // Load UnrollBlock* into rdi |
| __ mov(rdi, rax); |
| |
| #ifdef ASSERT |
| { Label L; |
| __ cmpptr(Address(rdi, Deoptimization::UnrollBlock::unpack_kind_offset_in_bytes()), |
| (int32_t)Deoptimization::Unpack_uncommon_trap); |
| __ jcc(Assembler::equal, L); |
| __ stop("SharedRuntime::generate_deopt_blob: expected Unpack_uncommon_trap"); |
| __ bind(L); |
| } |
| #endif |
| |
| // Pop all the frames we must move/replace. |
| // |
| // Frame picture (youngest to oldest) |
| // 1: self-frame (no frame link) |
| // 2: deopting frame (no frame link) |
| // 3: caller of deopting frame (could be compiled/interpreted). |
| |
| // Pop self-frame. We have no frame, and must rely only on rax and rsp. |
| __ addptr(rsp, (SimpleRuntimeFrame::framesize - 2) << LogBytesPerInt); // Epilog! |
| |
| // Pop deoptimized frame (int) |
| __ movl(rcx, Address(rdi, |
| Deoptimization::UnrollBlock:: |
| size_of_deoptimized_frame_offset_in_bytes())); |
| __ addptr(rsp, rcx); |
| |
| // rsp should be pointing at the return address to the caller (3) |
| |
| // Pick up the initial fp we should save |
| // restore rbp before stack bang because if stack overflow is thrown it needs to be pushed (and preserved) |
| __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_info_offset_in_bytes())); |
| |
| #ifdef ASSERT |
| // Compilers generate code that bang the stack by as much as the |
| // interpreter would need. So this stack banging should never |
| // trigger a fault. Verify that it does not on non product builds. |
| if (UseStackBanging) { |
| __ movl(rbx, Address(rdi ,Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); |
| __ bang_stack_size(rbx, rcx); |
| } |
| #endif |
| |
| // Load address of array of frame pcs into rcx (address*) |
| __ movptr(rcx, Address(rdi, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); |
| |
| // Trash the return pc |
| __ addptr(rsp, wordSize); |
| |
| // Load address of array of frame sizes into rsi (intptr_t*) |
| __ movptr(rsi, Address(rdi, Deoptimization::UnrollBlock:: frame_sizes_offset_in_bytes())); |
| |
| // Counter |
| __ movl(rdx, Address(rdi, Deoptimization::UnrollBlock:: number_of_frames_offset_in_bytes())); // (int) |
| |
| // Now adjust the caller's stack to make up for the extra locals but |
| // record the original sp so that we can save it in the skeletal |
| // interpreter frame and the stack walking of interpreter_sender |
| // will get the unextended sp value and not the "real" sp value. |
| |
| const Register sender_sp = r8; |
| |
| __ mov(sender_sp, rsp); |
| __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock:: caller_adjustment_offset_in_bytes())); // (int) |
| __ subptr(rsp, rbx); |
| |
| // Push interpreter frames in a loop |
| Label loop; |
| __ bind(loop); |
| __ movptr(rbx, Address(rsi, 0)); // Load frame size |
| __ subptr(rbx, 2 * wordSize); // We'll push pc and rbp by hand |
| __ pushptr(Address(rcx, 0)); // Save return address |
| __ enter(); // Save old & set new rbp |
| __ subptr(rsp, rbx); // Prolog |
| __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), |
| sender_sp); // Make it walkable |
| // This value is corrected by layout_activation_impl |
| __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
| __ mov(sender_sp, rsp); // Pass sender_sp to next frame |
| __ addptr(rsi, wordSize); // Bump array pointer (sizes) |
| __ addptr(rcx, wordSize); // Bump array pointer (pcs) |
| __ decrementl(rdx); // Decrement counter |
| __ jcc(Assembler::notZero, loop); |
| __ pushptr(Address(rcx, 0)); // Save final return address |
| |
| // Re-push self-frame |
| __ enter(); // Save old & set new rbp |
| __ subptr(rsp, (SimpleRuntimeFrame::framesize - 4) << LogBytesPerInt); |
| // Prolog |
| |
| // Use rbp because the frames look interpreted now |
| // Save "the_pc" since it cannot easily be retrieved using the last_java_SP after we aligned SP. |
| // Don't need the precise return PC here, just precise enough to point into this code blob. |
| address the_pc = __ pc(); |
| __ set_last_Java_frame(noreg, rbp, the_pc); |
| |
| // Call C code. Need thread but NOT official VM entry |
| // crud. We cannot block on this call, no GC can happen. Call should |
| // restore return values to their stack-slots with the new SP. |
| // Thread is in rdi already. |
| // |
| // BasicType unpack_frames(JavaThread* thread, int exec_mode); |
| |
| __ andptr(rsp, -(StackAlignmentInBytes)); // Align SP as required by ABI |
| __ mov(c_rarg0, r15_thread); |
| __ movl(c_rarg1, Deoptimization::Unpack_uncommon_trap); |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); |
| |
| // Set an oopmap for the call site |
| // Use the same PC we used for the last java frame |
| oop_maps->add_gc_map(the_pc - start, new OopMap(SimpleRuntimeFrame::framesize, 0)); |
| |
| // Clear fp AND pc |
| __ reset_last_Java_frame(true, true); |
| |
| // Pop self-frame. |
| __ leave(); // Epilog |
| |
| // Jump to interpreter |
| __ ret(0); |
| |
| // Make sure all code is generated |
| masm->flush(); |
| |
| _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, oop_maps, |
| SimpleRuntimeFrame::framesize >> 1); |
| } |
| #endif // COMPILER2 |
| |
| |
| //------------------------------generate_handler_blob------ |
| // |
| // Generate a special Compile2Runtime blob that saves all registers, |
| // and setup oopmap. |
| // |
| SafepointBlob* SharedRuntime::generate_handler_blob(address call_ptr, int poll_type) { |
| assert(StubRoutines::forward_exception_entry() != NULL, |
| "must be generated before"); |
| |
| ResourceMark rm; |
| OopMapSet *oop_maps = new OopMapSet(); |
| OopMap* map; |
| |
| // Allocate space for the code. Setup code generation tools. |
| CodeBuffer buffer("handler_blob", 2048, 1024); |
| MacroAssembler* masm = new MacroAssembler(&buffer); |
| |
| address start = __ pc(); |
| address call_pc = NULL; |
| int frame_size_in_words; |
| bool cause_return = (poll_type == POLL_AT_RETURN); |
| bool save_vectors = (poll_type == POLL_AT_VECTOR_LOOP); |
| |
| if (UseRTMLocking) { |
| // Abort RTM transaction before calling runtime |
| // because critical section will be large and will be |
| // aborted anyway. Also nmethod could be deoptimized. |
| __ xabort(0); |
| } |
| |
| // Make room for return address (or push it again) |
| if (!cause_return) { |
| __ push(rbx); |
| } |
| |
| // Save registers, fpu state, and flags |
| map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words, save_vectors); |
| |
| // The following is basically a call_VM. However, we need the precise |
| // address of the call in order to generate an oopmap. Hence, we do all the |
| // work outselves. |
| |
| __ set_last_Java_frame(noreg, noreg, NULL); |
| |
| // The return address must always be correct so that frame constructor never |
| // sees an invalid pc. |
| |
| if (!cause_return) { |
| // overwrite the dummy value we pushed on entry |
| __ movptr(c_rarg0, Address(r15_thread, JavaThread::saved_exception_pc_offset())); |
| __ movptr(Address(rbp, wordSize), c_rarg0); |
| } |
| |
| // Do the call |
| __ mov(c_rarg0, r15_thread); |
| __ call(RuntimeAddress(call_ptr)); |
| |
| // Set an oopmap for the call site. This oopmap will map all |
| // oop-registers and debug-info registers as callee-saved. This |
| // will allow deoptimization at this safepoint to find all possible |
| // debug-info recordings, as well as let GC find all oops. |
| |
| oop_maps->add_gc_map( __ pc() - start, map); |
| |
| Label noException; |
| |
| __ reset_last_Java_frame(false, false); |
| |
| __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
| __ jcc(Assembler::equal, noException); |
| |
| // Exception pending |
| |
| RegisterSaver::restore_live_registers(masm, save_vectors); |
| |
| __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
| |
| // No exception case |
| __ bind(noException); |
| |
| // Normal exit, restore registers and exit. |
| RegisterSaver::restore_live_registers(masm, save_vectors); |
| |
| __ ret(0); |
| |
| // Make sure all code is generated |
| masm->flush(); |
| |
| // Fill-out other meta info |
| return SafepointBlob::create(&buffer, oop_maps, frame_size_in_words); |
| } |
| |
| // |
| // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss |
| // |
| // Generate a stub that calls into vm to find out the proper destination |
| // of a java call. All the argument registers are live at this point |
| // but since this is generic code we don't know what they are and the caller |
| // must do any gc of the args. |
| // |
| RuntimeStub* SharedRuntime::generate_resolve_blob(address destination, const char* name) { |
| assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); |
| |
| // allocate space for the code |
| ResourceMark rm; |
| |
| CodeBuffer buffer(name, 1000, 512); |
| MacroAssembler* masm = new MacroAssembler(&buffer); |
| |
| int frame_size_in_words; |
| |
| OopMapSet *oop_maps = new OopMapSet(); |
| OopMap* map = NULL; |
| |
| int start = __ offset(); |
| |
| map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); |
| |
| int frame_complete = __ offset(); |
| |
| __ set_last_Java_frame(noreg, noreg, NULL); |
| |
| __ mov(c_rarg0, r15_thread); |
| |
| __ call(RuntimeAddress(destination)); |
| |
| |
| // Set an oopmap for the call site. |
| // We need this not only for callee-saved registers, but also for volatile |
| // registers that the compiler might be keeping live across a safepoint. |
| |
| oop_maps->add_gc_map( __ offset() - start, map); |
| |
| // rax contains the address we are going to jump to assuming no exception got installed |
| |
| // clear last_Java_sp |
| __ reset_last_Java_frame(false, false); |
| // check for pending exceptions |
| Label pending; |
| __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
| __ jcc(Assembler::notEqual, pending); |
| |
| // get the returned Method* |
| __ get_vm_result_2(rbx, r15_thread); |
| __ movptr(Address(rsp, RegisterSaver::rbx_offset_in_bytes()), rbx); |
| |
| __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); |
| |
| RegisterSaver::restore_live_registers(masm); |
| |
| // We are back the the original state on entry and ready to go. |
| |
| __ jmp(rax); |
| |
| // Pending exception after the safepoint |
| |
| __ bind(pending); |
| |
| RegisterSaver::restore_live_registers(masm); |
| |
| // exception pending => remove activation and forward to exception handler |
| |
| __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), (int)NULL_WORD); |
| |
| __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); |
| __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
| |
| // ------------- |
| // make sure all code is generated |
| masm->flush(); |
| |
| // return the blob |
| // frame_size_words or bytes?? |
| return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, true); |
| } |
| |
| |
| //------------------------------Montgomery multiplication------------------------ |
| // |
| |
| #ifndef _WINDOWS |
| |
| #define ASM_SUBTRACT |
| |
| #ifdef ASM_SUBTRACT |
| // Subtract 0:b from carry:a. Return carry. |
| static unsigned long |
| sub(unsigned long a[], unsigned long b[], unsigned long carry, long len) { |
| long i = 0, cnt = len; |
| unsigned long tmp; |
| asm volatile("clc; " |
| "0: ; " |
| "mov (%[b], %[i], 8), %[tmp]; " |
| "sbb %[tmp], (%[a], %[i], 8); " |
| "inc %[i]; dec %[cnt]; " |
| "jne 0b; " |
| "mov %[carry], %[tmp]; sbb $0, %[tmp]; " |
| : [i]"+r"(i), [cnt]"+r"(cnt), [tmp]"=&r"(tmp) |
| : [a]"r"(a), [b]"r"(b), [carry]"r"(carry) |
| : "memory"); |
| return tmp; |
| } |
| #else // ASM_SUBTRACT |
| typedef int __attribute__((mode(TI))) int128; |
| |
| // Subtract 0:b from carry:a. Return carry. |
| static unsigned long |
| sub(unsigned long a[], unsigned long b[], unsigned long carry, int len) { |
| int128 tmp = 0; |
| int i; |
| for (i = 0; i < len; i++) { |
| tmp += a[i]; |
| tmp -= b[i]; |
| a[i] = tmp; |
| tmp >>= 64; |
| assert(-1 <= tmp && tmp <= 0, "invariant"); |
| } |
| return tmp + carry; |
| } |
| #endif // ! ASM_SUBTRACT |
| |
| // Multiply (unsigned) Long A by Long B, accumulating the double- |
| // length result into the accumulator formed of T0, T1, and T2. |
| #define MACC(A, B, T0, T1, T2) \ |
| do { \ |
| unsigned long hi, lo; \ |
| __asm__ ("mul %5; add %%rax, %2; adc %%rdx, %3; adc $0, %4" \ |
| : "=&d"(hi), "=a"(lo), "+r"(T0), "+r"(T1), "+g"(T2) \ |
| : "r"(A), "a"(B) : "cc"); \ |
| } while(0) |
| |
| // As above, but add twice the double-length result into the |
| // accumulator. |
| #define MACC2(A, B, T0, T1, T2) \ |
| do { \ |
| unsigned long hi, lo; \ |
| __asm__ ("mul %5; add %%rax, %2; adc %%rdx, %3; adc $0, %4; " \ |
| "add %%rax, %2; adc %%rdx, %3; adc $0, %4" \ |
| : "=&d"(hi), "=a"(lo), "+r"(T0), "+r"(T1), "+g"(T2) \ |
| : "r"(A), "a"(B) : "cc"); \ |
| } while(0) |
| |
| // Fast Montgomery multiplication. The derivation of the algorithm is |
| // in A Cryptographic Library for the Motorola DSP56000, |
| // Dusse and Kaliski, Proc. EUROCRYPT 90, pp. 230-237. |
| |
| static void __attribute__((noinline)) |
| montgomery_multiply(unsigned long a[], unsigned long b[], unsigned long n[], |
| unsigned long m[], unsigned long inv, int len) { |
| unsigned long t0 = 0, t1 = 0, t2 = 0; // Triple-precision accumulator |
| int i; |
| |
| assert(inv * n[0] == -1UL, "broken inverse in Montgomery multiply"); |
| |
| for (i = 0; i < len; i++) { |
| int j; |
| for (j = 0; j < i; j++) { |
| MACC(a[j], b[i-j], t0, t1, t2); |
| MACC(m[j], n[i-j], t0, t1, t2); |
| } |
| MACC(a[i], b[0], t0, t1, t2); |
| m[i] = t0 * inv; |
| MACC(m[i], n[0], t0, t1, t2); |
| |
| assert(t0 == 0, "broken Montgomery multiply"); |
| |
| t0 = t1; t1 = t2; t2 = 0; |
| } |
| |
| for (i = len; i < 2*len; i++) { |
| int j; |
| for (j = i-len+1; j < len; j++) { |
| MACC(a[j], b[i-j], t0, t1, t2); |
| MACC(m[j], n[i-j], t0, t1, t2); |
| } |
| m[i-len] = t0; |
| t0 = t1; t1 = t2; t2 = 0; |
| } |
| |
| while (t0) |
| t0 = sub(m, n, t0, len); |
| } |
| |
| // Fast Montgomery squaring. This uses asymptotically 25% fewer |
| // multiplies so it should be up to 25% faster than Montgomery |
| // multiplication. However, its loop control is more complex and it |
| // may actually run slower on some machines. |
| |
| static void __attribute__((noinline)) |
| montgomery_square(unsigned long a[], unsigned long n[], |
| unsigned long m[], unsigned long inv, int len) { |
| unsigned long t0 = 0, t1 = 0, t2 = 0; // Triple-precision accumulator |
| int i; |
| |
| assert(inv * n[0] == -1UL, "broken inverse in Montgomery multiply"); |
| |
| for (i = 0; i < len; i++) { |
| int j; |
| int end = (i+1)/2; |
| for (j = 0; j < end; j++) { |
| MACC2(a[j], a[i-j], t0, t1, t2); |
| MACC(m[j], n[i-j], t0, t1, t2); |
| } |
| if ((i & 1) == 0) { |
| MACC(a[j], a[j], t0, t1, t2); |
| } |
| for (; j < i; j++) { |
| MACC(m[j], n[i-j], t0, t1, t2); |
| } |
| m[i] = t0 * inv; |
| MACC(m[i], n[0], t0, t1, t2); |
| |
| assert(t0 == 0, "broken Montgomery square"); |
| |
| t0 = t1; t1 = t2; t2 = 0; |
| } |
| |
| for (i = len; i < 2*len; i++) { |
| int start = i-len+1; |
| int end = start + (len - start)/2; |
| int j; |
| for (j = start; j < end; j++) { |
| MACC2(a[j], a[i-j], t0, t1, t2); |
| MACC(m[j], n[i-j], t0, t1, t2); |
| } |
| if ((i & 1) == 0) { |
| MACC(a[j], a[j], t0, t1, t2); |
| } |
| for (; j < len; j++) { |
| MACC(m[j], n[i-j], t0, t1, t2); |
| } |
| m[i-len] = t0; |
| t0 = t1; t1 = t2; t2 = 0; |
| } |
| |
| while (t0) |
| t0 = sub(m, n, t0, len); |
| } |
| |
| // Swap words in a longword. |
| static unsigned long swap(unsigned long x) { |
| return (x << 32) | (x >> 32); |
| } |
| |
| // Copy len longwords from s to d, word-swapping as we go. The |
| // destination array is reversed. |
| static void reverse_words(unsigned long *s, unsigned long *d, int len) { |
| d += len; |
| while(len-- > 0) { |
| d--; |
| *d = swap(*s); |
| s++; |
| } |
| } |
| |
| // The threshold at which squaring is advantageous was determined |
| // experimentally on an i7-3930K (Ivy Bridge) CPU @ 3.5GHz. |
| #define MONTGOMERY_SQUARING_THRESHOLD 64 |
| |
| void SharedRuntime::montgomery_multiply(jint *a_ints, jint *b_ints, jint *n_ints, |
| jint len, jlong inv, |
| jint *m_ints) { |
| assert(len % 2 == 0, "array length in montgomery_multiply must be even"); |
| int longwords = len/2; |
| |
| // Make very sure we don't use so much space that the stack might |
| // overflow. 512 jints corresponds to an 16384-bit integer and |
| // will use here a total of 8k bytes of stack space. |
| int total_allocation = longwords * sizeof (unsigned long) * 4; |
| guarantee(total_allocation <= 8192, "must be"); |
| unsigned long *scratch = (unsigned long *)alloca(total_allocation); |
| |
| // Local scratch arrays |
| unsigned long |
| *a = scratch + 0 * longwords, |
| *b = scratch + 1 * longwords, |
| *n = scratch + 2 * longwords, |
| *m = scratch + 3 * longwords; |
| |
| reverse_words((unsigned long *)a_ints, a, longwords); |
| reverse_words((unsigned long *)b_ints, b, longwords); |
| reverse_words((unsigned long *)n_ints, n, longwords); |
| |
| ::montgomery_multiply(a, b, n, m, (unsigned long)inv, longwords); |
| |
| reverse_words(m, (unsigned long *)m_ints, longwords); |
| } |
| |
| void SharedRuntime::montgomery_square(jint *a_ints, jint *n_ints, |
| jint len, jlong inv, |
| jint *m_ints) { |
| assert(len % 2 == 0, "array length in montgomery_square must be even"); |
| int longwords = len/2; |
| |
| // Make very sure we don't use so much space that the stack might |
| // overflow. 512 jints corresponds to an 16384-bit integer and |
| // will use here a total of 6k bytes of stack space. |
| int total_allocation = longwords * sizeof (unsigned long) * 3; |
| guarantee(total_allocation <= 8192, "must be"); |
| unsigned long *scratch = (unsigned long *)alloca(total_allocation); |
| |
| // Local scratch arrays |
| unsigned long |
| *a = scratch + 0 * longwords, |
| *n = scratch + 1 * longwords, |
| *m = scratch + 2 * longwords; |
| |
| reverse_words((unsigned long *)a_ints, a, longwords); |
| reverse_words((unsigned long *)n_ints, n, longwords); |
| |
| if (len >= MONTGOMERY_SQUARING_THRESHOLD) { |
| ::montgomery_square(a, n, m, (unsigned long)inv, longwords); |
| } else { |
| ::montgomery_multiply(a, a, n, m, (unsigned long)inv, longwords); |
| } |
| |
| reverse_words(m, (unsigned long *)m_ints, longwords); |
| } |
| |
| #endif // WINDOWS |
| |
| #ifdef COMPILER2 |
| // This is here instead of runtime_x86_64.cpp because it uses SimpleRuntimeFrame |
| // |
| //------------------------------generate_exception_blob--------------------------- |
| // creates exception blob at the end |
| // Using exception blob, this code is jumped from a compiled method. |
| // (see emit_exception_handler in x86_64.ad file) |
| // |
| // Given an exception pc at a call we call into the runtime for the |
| // handler in this method. This handler might merely restore state |
| // (i.e. callee save registers) unwind the frame and jump to the |
| // exception handler for the nmethod if there is no Java level handler |
| // for the nmethod. |
| // |
| // This code is entered with a jmp. |
| // |
| // Arguments: |
| // rax: exception oop |
| // rdx: exception pc |
| // |
| // Results: |
| // rax: exception oop |
| // rdx: exception pc in caller or ??? |
| // destination: exception handler of caller |
| // |
| // Note: the exception pc MUST be at a call (precise debug information) |
| // Registers rax, rdx, rcx, rsi, rdi, r8-r11 are not callee saved. |
| // |
| |
| void OptoRuntime::generate_exception_blob() { |
| assert(!OptoRuntime::is_callee_saved_register(RDX_num), ""); |
| assert(!OptoRuntime::is_callee_saved_register(RAX_num), ""); |
| assert(!OptoRuntime::is_callee_saved_register(RCX_num), ""); |
| |
| assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); |
| |
| // Allocate space for the code |
| ResourceMark rm; |
| // Setup code generation tools |
| CodeBuffer buffer("exception_blob", 2048, 1024); |
| MacroAssembler* masm = new MacroAssembler(&buffer); |
| |
| |
| address start = __ pc(); |
| |
| // Exception pc is 'return address' for stack walker |
| __ push(rdx); |
| __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Prolog |
| |
| // Save callee-saved registers. See x86_64.ad. |
| |
| // rbp is an implicitly saved callee saved register (i.e., the calling |
| // convention will save/restore it in the prolog/epilog). Other than that |
| // there are no callee save registers now that adapter frames are gone. |
| |
| __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
| |
| // Store exception in Thread object. We cannot pass any arguments to the |
| // handle_exception call, since we do not want to make any assumption |
| // about the size of the frame where the exception happened in. |
| // c_rarg0 is either rdi (Linux) or rcx (Windows). |
| __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()),rax); |
| __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); |
| |
| // This call does all the hard work. It checks if an exception handler |
| // exists in the method. |
| // If so, it returns the handler address. |
| // If not, it prepares for stack-unwinding, restoring the callee-save |
| // registers of the frame being removed. |
| // |
| // address OptoRuntime::handle_exception_C(JavaThread* thread) |
| |
| // At a method handle call, the stack may not be properly aligned |
| // when returning with an exception. |
| address the_pc = __ pc(); |
| __ set_last_Java_frame(noreg, noreg, the_pc); |
| __ mov(c_rarg0, r15_thread); |
| __ andptr(rsp, -(StackAlignmentInBytes)); // Align stack |
| __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C))); |
| |
| // Set an oopmap for the call site. This oopmap will only be used if we |
| // are unwinding the stack. Hence, all locations will be dead. |
| // Callee-saved registers will be the same as the frame above (i.e., |
| // handle_exception_stub), since they were restored when we got the |
| // exception. |
| |
| OopMapSet* oop_maps = new OopMapSet(); |
| |
| oop_maps->add_gc_map(the_pc - start, new OopMap(SimpleRuntimeFrame::framesize, 0)); |
| |
| __ reset_last_Java_frame(false, true); |
| |
| // Restore callee-saved registers |
| |
| // rbp is an implicitly saved callee-saved register (i.e., the calling |
| // convention will save restore it in prolog/epilog) Other than that |
| // there are no callee save registers now that adapter frames are gone. |
| |
| __ movptr(rbp, Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt)); |
| |
| __ addptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog |
| __ pop(rdx); // No need for exception pc anymore |
| |
| // rax: exception handler |
| |
| // We have a handler in rax (could be deopt blob). |
| __ mov(r8, rax); |
| |
| // Get the exception oop |
| __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); |
| // Get the exception pc in case we are deoptimized |
| __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); |
| #ifdef ASSERT |
| __ movptr(Address(r15_thread, JavaThread::exception_handler_pc_offset()), (int)NULL_WORD); |
| __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int)NULL_WORD); |
| #endif |
| // Clear the exception oop so GC no longer processes it as a root. |
| __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int)NULL_WORD); |
| |
| // rax: exception oop |
| // r8: exception handler |
| // rdx: exception pc |
| // Jump to handler |
| |
| __ jmp(r8); |
| |
| // Make sure all code is generated |
| masm->flush(); |
| |
| // Set exception blob |
| _exception_blob = ExceptionBlob::create(&buffer, oop_maps, SimpleRuntimeFrame::framesize >> 1); |
| } |
| #endif // COMPILER2 |