/* * Copyright (c) 2003, 2011, 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" #include "asm/assembler.hpp" #include "assembler_x86.inline.hpp" #include "interpreter/interpreter.hpp" #include "nativeInst_x86.hpp" #include "oops/instanceOop.hpp" #include "oops/methodOop.hpp" #include "oops/objArrayKlass.hpp" #include "oops/oop.inline.hpp" #include "prims/methodHandles.hpp" #include "runtime/frame.inline.hpp" #include "runtime/handles.inline.hpp" #include "runtime/sharedRuntime.hpp" #include "runtime/stubCodeGenerator.hpp" #include "runtime/stubRoutines.hpp" #include "utilities/top.hpp" #ifdef TARGET_OS_FAMILY_linux # include "thread_linux.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_solaris # include "thread_solaris.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_windows # include "thread_windows.inline.hpp" #endif #ifdef TARGET_OS_FAMILY_bsd # include "thread_bsd.inline.hpp" #endif #ifdef COMPILER2 #include "opto/runtime.hpp" #endif // Declaration and definition of StubGenerator (no .hpp file). // For a more detailed description of the stub routine structure // see the comment in stubRoutines.hpp #define __ _masm-> #define TIMES_OOP (UseCompressedOops ? Address::times_4 : Address::times_8) #define a__ ((Assembler*)_masm)-> #ifdef PRODUCT #define BLOCK_COMMENT(str) /* nothing */ #else #define BLOCK_COMMENT(str) __ block_comment(str) #endif #define BIND(label) bind(label); BLOCK_COMMENT(#label ":") const int MXCSR_MASK = 0xFFC0; // Mask out any pending exceptions // Stub Code definitions static address handle_unsafe_access() { JavaThread* thread = JavaThread::current(); address pc = thread->saved_exception_pc(); // pc is the instruction which we must emulate // doing a no-op is fine: return garbage from the load // therefore, compute npc address npc = Assembler::locate_next_instruction(pc); // request an async exception thread->set_pending_unsafe_access_error(); // return address of next instruction to execute return npc; } class StubGenerator: public StubCodeGenerator { private: #ifdef PRODUCT #define inc_counter_np(counter) (0) #else void inc_counter_np_(int& counter) { __ incrementl(ExternalAddress((address)&counter)); } #define inc_counter_np(counter) \ BLOCK_COMMENT("inc_counter " #counter); \ inc_counter_np_(counter); #endif // Call stubs are used to call Java from C // // Linux Arguments: // c_rarg0: call wrapper address address // c_rarg1: result address // c_rarg2: result type BasicType // c_rarg3: method methodOop // c_rarg4: (interpreter) entry point address // c_rarg5: parameters intptr_t* // 16(rbp): parameter size (in words) int // 24(rbp): thread Thread* // // [ return_from_Java ] <--- rsp // [ argument word n ] // ... // -12 [ argument word 1 ] // -11 [ saved r15 ] <--- rsp_after_call // -10 [ saved r14 ] // -9 [ saved r13 ] // -8 [ saved r12 ] // -7 [ saved rbx ] // -6 [ call wrapper ] // -5 [ result ] // -4 [ result type ] // -3 [ method ] // -2 [ entry point ] // -1 [ parameters ] // 0 [ saved rbp ] <--- rbp // 1 [ return address ] // 2 [ parameter size ] // 3 [ thread ] // // Windows Arguments: // c_rarg0: call wrapper address address // c_rarg1: result address // c_rarg2: result type BasicType // c_rarg3: method methodOop // 48(rbp): (interpreter) entry point address // 56(rbp): parameters intptr_t* // 64(rbp): parameter size (in words) int // 72(rbp): thread Thread* // // [ return_from_Java ] <--- rsp // [ argument word n ] // ... // -28 [ argument word 1 ] // -27 [ saved xmm15 ] <--- rsp_after_call // [ saved xmm7-xmm14 ] // -9 [ saved xmm6 ] (each xmm register takes 2 slots) // -7 [ saved r15 ] // -6 [ saved r14 ] // -5 [ saved r13 ] // -4 [ saved r12 ] // -3 [ saved rdi ] // -2 [ saved rsi ] // -1 [ saved rbx ] // 0 [ saved rbp ] <--- rbp // 1 [ return address ] // 2 [ call wrapper ] // 3 [ result ] // 4 [ result type ] // 5 [ method ] // 6 [ entry point ] // 7 [ parameters ] // 8 [ parameter size ] // 9 [ thread ] // // Windows reserves the callers stack space for arguments 1-4. // We spill c_rarg0-c_rarg3 to this space. // Call stub stack layout word offsets from rbp enum call_stub_layout { #ifdef _WIN64 xmm_save_first = 6, // save from xmm6 xmm_save_last = 15, // to xmm15 xmm_save_base = -9, rsp_after_call_off = xmm_save_base - 2 * (xmm_save_last - xmm_save_first), // -27 r15_off = -7, r14_off = -6, r13_off = -5, r12_off = -4, rdi_off = -3, rsi_off = -2, rbx_off = -1, rbp_off = 0, retaddr_off = 1, call_wrapper_off = 2, result_off = 3, result_type_off = 4, method_off = 5, entry_point_off = 6, parameters_off = 7, parameter_size_off = 8, thread_off = 9 #else rsp_after_call_off = -12, mxcsr_off = rsp_after_call_off, r15_off = -11, r14_off = -10, r13_off = -9, r12_off = -8, rbx_off = -7, call_wrapper_off = -6, result_off = -5, result_type_off = -4, method_off = -3, entry_point_off = -2, parameters_off = -1, rbp_off = 0, retaddr_off = 1, parameter_size_off = 2, thread_off = 3 #endif }; #ifdef _WIN64 Address xmm_save(int reg) { assert(reg >= xmm_save_first && reg <= xmm_save_last, "XMM register number out of range"); return Address(rbp, (xmm_save_base - (reg - xmm_save_first) * 2) * wordSize); } #endif address generate_call_stub(address& return_address) { assert((int)frame::entry_frame_after_call_words == -(int)rsp_after_call_off + 1 && (int)frame::entry_frame_call_wrapper_offset == (int)call_wrapper_off, "adjust this code"); StubCodeMark mark(this, "StubRoutines", "call_stub"); address start = __ pc(); // same as in generate_catch_exception()! const Address rsp_after_call(rbp, rsp_after_call_off * wordSize); const Address call_wrapper (rbp, call_wrapper_off * wordSize); const Address result (rbp, result_off * wordSize); const Address result_type (rbp, result_type_off * wordSize); const Address method (rbp, method_off * wordSize); const Address entry_point (rbp, entry_point_off * wordSize); const Address parameters (rbp, parameters_off * wordSize); const Address parameter_size(rbp, parameter_size_off * wordSize); // same as in generate_catch_exception()! const Address thread (rbp, thread_off * wordSize); const Address r15_save(rbp, r15_off * wordSize); const Address r14_save(rbp, r14_off * wordSize); const Address r13_save(rbp, r13_off * wordSize); const Address r12_save(rbp, r12_off * wordSize); const Address rbx_save(rbp, rbx_off * wordSize); // stub code __ enter(); __ subptr(rsp, -rsp_after_call_off * wordSize); // save register parameters #ifndef _WIN64 __ movptr(parameters, c_rarg5); // parameters __ movptr(entry_point, c_rarg4); // entry_point #endif __ movptr(method, c_rarg3); // method __ movl(result_type, c_rarg2); // result type __ movptr(result, c_rarg1); // result __ movptr(call_wrapper, c_rarg0); // call wrapper // save regs belonging to calling function __ movptr(rbx_save, rbx); __ movptr(r12_save, r12); __ movptr(r13_save, r13); __ movptr(r14_save, r14); __ movptr(r15_save, r15); #ifdef _WIN64 for (int i = 6; i <= 15; i++) { __ movdqu(xmm_save(i), as_XMMRegister(i)); } const Address rdi_save(rbp, rdi_off * wordSize); const Address rsi_save(rbp, rsi_off * wordSize); __ movptr(rsi_save, rsi); __ movptr(rdi_save, rdi); #else const Address mxcsr_save(rbp, mxcsr_off * wordSize); { Label skip_ldmx; __ stmxcsr(mxcsr_save); __ movl(rax, mxcsr_save); __ andl(rax, MXCSR_MASK); // Only check control and mask bits ExternalAddress mxcsr_std(StubRoutines::x86::mxcsr_std()); __ cmp32(rax, mxcsr_std); __ jcc(Assembler::equal, skip_ldmx); __ ldmxcsr(mxcsr_std); __ bind(skip_ldmx); } #endif // Load up thread register __ movptr(r15_thread, thread); __ reinit_heapbase(); #ifdef ASSERT // make sure we have no pending exceptions { Label L; __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); __ jcc(Assembler::equal, L); __ stop("StubRoutines::call_stub: entered with pending exception"); __ bind(L); } #endif // pass parameters if any BLOCK_COMMENT("pass parameters if any"); Label parameters_done; __ movl(c_rarg3, parameter_size); __ testl(c_rarg3, c_rarg3); __ jcc(Assembler::zero, parameters_done); Label loop; __ movptr(c_rarg2, parameters); // parameter pointer __ movl(c_rarg1, c_rarg3); // parameter counter is in c_rarg1 __ BIND(loop); __ movptr(rax, Address(c_rarg2, 0));// get parameter __ addptr(c_rarg2, wordSize); // advance to next parameter __ decrementl(c_rarg1); // decrement counter __ push(rax); // pass parameter __ jcc(Assembler::notZero, loop); // call Java function __ BIND(parameters_done); __ movptr(rbx, method); // get methodOop __ movptr(c_rarg1, entry_point); // get entry_point __ mov(r13, rsp); // set sender sp BLOCK_COMMENT("call Java function"); __ call(c_rarg1); BLOCK_COMMENT("call_stub_return_address:"); return_address = __ pc(); // store result depending on type (everything that is not // T_OBJECT, T_LONG, T_FLOAT or T_DOUBLE is treated as T_INT) __ movptr(c_rarg0, result); Label is_long, is_float, is_double, exit; __ movl(c_rarg1, result_type); __ cmpl(c_rarg1, T_OBJECT); __ jcc(Assembler::equal, is_long); __ cmpl(c_rarg1, T_LONG); __ jcc(Assembler::equal, is_long); __ cmpl(c_rarg1, T_FLOAT); __ jcc(Assembler::equal, is_float); __ cmpl(c_rarg1, T_DOUBLE); __ jcc(Assembler::equal, is_double); // handle T_INT case __ movl(Address(c_rarg0, 0), rax); __ BIND(exit); // pop parameters __ lea(rsp, rsp_after_call); #ifdef ASSERT // verify that threads correspond { Label L, S; __ cmpptr(r15_thread, thread); __ jcc(Assembler::notEqual, S); __ get_thread(rbx); __ cmpptr(r15_thread, rbx); __ jcc(Assembler::equal, L); __ bind(S); __ jcc(Assembler::equal, L); __ stop("StubRoutines::call_stub: threads must correspond"); __ bind(L); } #endif // restore regs belonging to calling function #ifdef _WIN64 for (int i = 15; i >= 6; i--) { __ movdqu(as_XMMRegister(i), xmm_save(i)); } #endif __ movptr(r15, r15_save); __ movptr(r14, r14_save); __ movptr(r13, r13_save); __ movptr(r12, r12_save); __ movptr(rbx, rbx_save); #ifdef _WIN64 __ movptr(rdi, rdi_save); __ movptr(rsi, rsi_save); #else __ ldmxcsr(mxcsr_save); #endif // restore rsp __ addptr(rsp, -rsp_after_call_off * wordSize); // return __ pop(rbp); __ ret(0); // handle return types different from T_INT __ BIND(is_long); __ movq(Address(c_rarg0, 0), rax); __ jmp(exit); __ BIND(is_float); __ movflt(Address(c_rarg0, 0), xmm0); __ jmp(exit); __ BIND(is_double); __ movdbl(Address(c_rarg0, 0), xmm0); __ jmp(exit); return start; } // Return point for a Java call if there's an exception thrown in // Java code. The exception is caught and transformed into a // pending exception stored in JavaThread that can be tested from // within the VM. // // Note: Usually the parameters are removed by the callee. In case // of an exception crossing an activation frame boundary, that is // not the case if the callee is compiled code => need to setup the // rsp. // // rax: exception oop address generate_catch_exception() { StubCodeMark mark(this, "StubRoutines", "catch_exception"); address start = __ pc(); // same as in generate_call_stub(): const Address rsp_after_call(rbp, rsp_after_call_off * wordSize); const Address thread (rbp, thread_off * wordSize); #ifdef ASSERT // verify that threads correspond { Label L, S; __ cmpptr(r15_thread, thread); __ jcc(Assembler::notEqual, S); __ get_thread(rbx); __ cmpptr(r15_thread, rbx); __ jcc(Assembler::equal, L); __ bind(S); __ stop("StubRoutines::catch_exception: threads must correspond"); __ bind(L); } #endif // set pending exception __ verify_oop(rax); __ movptr(Address(r15_thread, Thread::pending_exception_offset()), rax); __ lea(rscratch1, ExternalAddress((address)__FILE__)); __ movptr(Address(r15_thread, Thread::exception_file_offset()), rscratch1); __ movl(Address(r15_thread, Thread::exception_line_offset()), (int) __LINE__); // complete return to VM assert(StubRoutines::_call_stub_return_address != NULL, "_call_stub_return_address must have been generated before"); __ jump(RuntimeAddress(StubRoutines::_call_stub_return_address)); return start; } // Continuation point for runtime calls returning with a pending // exception. The pending exception check happened in the runtime // or native call stub. The pending exception in Thread is // converted into a Java-level exception. // // Contract with Java-level exception handlers: // rax: exception // rdx: throwing pc // // NOTE: At entry of this stub, exception-pc must be on stack !! address generate_forward_exception() { StubCodeMark mark(this, "StubRoutines", "forward exception"); address start = __ pc(); // Upon entry, the sp points to the return address returning into // Java (interpreted or compiled) code; i.e., the return address // becomes the throwing pc. // // Arguments pushed before the runtime call are still on the stack // but the exception handler will reset the stack pointer -> // ignore them. A potential result in registers can be ignored as // well. #ifdef ASSERT // make sure this code is only executed if there is a pending exception { Label L; __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL); __ jcc(Assembler::notEqual, L); __ stop("StubRoutines::forward exception: no pending exception (1)"); __ bind(L); } #endif // compute exception handler into rbx __ movptr(c_rarg0, Address(rsp, 0)); BLOCK_COMMENT("call exception_handler_for_return_address"); __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), r15_thread, c_rarg0); __ mov(rbx, rax); // setup rax & rdx, remove return address & clear pending exception __ pop(rdx); __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); __ movptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); #ifdef ASSERT // make sure exception is set { Label L; __ testptr(rax, rax); __ jcc(Assembler::notEqual, L); __ stop("StubRoutines::forward exception: no pending exception (2)"); __ bind(L); } #endif // continue at exception handler (return address removed) // rax: exception // rbx: exception handler // rdx: throwing pc __ verify_oop(rax); __ jmp(rbx); return start; } // Support for jint atomic::xchg(jint exchange_value, volatile jint* dest) // // Arguments : // c_rarg0: exchange_value // c_rarg0: dest // // Result: // *dest <- ex, return (orig *dest) address generate_atomic_xchg() { StubCodeMark mark(this, "StubRoutines", "atomic_xchg"); address start = __ pc(); __ movl(rax, c_rarg0); // Copy to eax we need a return value anyhow __ xchgl(rax, Address(c_rarg1, 0)); // automatic LOCK __ ret(0); return start; } // Support for intptr_t atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) // // Arguments : // c_rarg0: exchange_value // c_rarg1: dest // // Result: // *dest <- ex, return (orig *dest) address generate_atomic_xchg_ptr() { StubCodeMark mark(this, "StubRoutines", "atomic_xchg_ptr"); address start = __ pc(); __ movptr(rax, c_rarg0); // Copy to eax we need a return value anyhow __ xchgptr(rax, Address(c_rarg1, 0)); // automatic LOCK __ ret(0); return start; } // Support for jint atomic::atomic_cmpxchg(jint exchange_value, volatile jint* dest, // jint compare_value) // // Arguments : // c_rarg0: exchange_value // c_rarg1: dest // c_rarg2: compare_value // // Result: // if ( compare_value == *dest ) { // *dest = exchange_value // return compare_value; // else // return *dest; address generate_atomic_cmpxchg() { StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg"); address start = __ pc(); __ movl(rax, c_rarg2); if ( os::is_MP() ) __ lock(); __ cmpxchgl(c_rarg0, Address(c_rarg1, 0)); __ ret(0); return start; } // Support for jint atomic::atomic_cmpxchg_long(jlong exchange_value, // volatile jlong* dest, // jlong compare_value) // Arguments : // c_rarg0: exchange_value // c_rarg1: dest // c_rarg2: compare_value // // Result: // if ( compare_value == *dest ) { // *dest = exchange_value // return compare_value; // else // return *dest; address generate_atomic_cmpxchg_long() { StubCodeMark mark(this, "StubRoutines", "atomic_cmpxchg_long"); address start = __ pc(); __ movq(rax, c_rarg2); if ( os::is_MP() ) __ lock(); __ cmpxchgq(c_rarg0, Address(c_rarg1, 0)); __ ret(0); return start; } // Support for jint atomic::add(jint add_value, volatile jint* dest) // // Arguments : // c_rarg0: add_value // c_rarg1: dest // // Result: // *dest += add_value // return *dest; address generate_atomic_add() { StubCodeMark mark(this, "StubRoutines", "atomic_add"); address start = __ pc(); __ movl(rax, c_rarg0); if ( os::is_MP() ) __ lock(); __ xaddl(Address(c_rarg1, 0), c_rarg0); __ addl(rax, c_rarg0); __ ret(0); return start; } // Support for intptr_t atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) // // Arguments : // c_rarg0: add_value // c_rarg1: dest // // Result: // *dest += add_value // return *dest; address generate_atomic_add_ptr() { StubCodeMark mark(this, "StubRoutines", "atomic_add_ptr"); address start = __ pc(); __ movptr(rax, c_rarg0); // Copy to eax we need a return value anyhow if ( os::is_MP() ) __ lock(); __ xaddptr(Address(c_rarg1, 0), c_rarg0); __ addptr(rax, c_rarg0); __ ret(0); return start; } // Support for intptr_t OrderAccess::fence() // // Arguments : // // Result: address generate_orderaccess_fence() { StubCodeMark mark(this, "StubRoutines", "orderaccess_fence"); address start = __ pc(); __ membar(Assembler::StoreLoad); __ ret(0); return start; } // Support for intptr_t get_previous_fp() // // This routine is used to find the previous frame pointer for the // caller (current_frame_guess). This is used as part of debugging // ps() is seemingly lost trying to find frames. // This code assumes that caller current_frame_guess) has a frame. address generate_get_previous_fp() { StubCodeMark mark(this, "StubRoutines", "get_previous_fp"); const Address old_fp(rbp, 0); const Address older_fp(rax, 0); address start = __ pc(); __ enter(); __ movptr(rax, old_fp); // callers fp __ movptr(rax, older_fp); // the frame for ps() __ pop(rbp); __ ret(0); return start; } //---------------------------------------------------------------------------------------------------- // Support for void verify_mxcsr() // // This routine is used with -Xcheck:jni to verify that native // JNI code does not return to Java code without restoring the // MXCSR register to our expected state. address generate_verify_mxcsr() { StubCodeMark mark(this, "StubRoutines", "verify_mxcsr"); address start = __ pc(); const Address mxcsr_save(rsp, 0); if (CheckJNICalls) { Label ok_ret; __ push(rax); __ subptr(rsp, wordSize); // allocate a temp location __ stmxcsr(mxcsr_save); __ movl(rax, mxcsr_save); __ andl(rax, MXCSR_MASK); // Only check control and mask bits __ cmpl(rax, *(int *)(StubRoutines::x86::mxcsr_std())); __ jcc(Assembler::equal, ok_ret); __ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall"); __ ldmxcsr(ExternalAddress(StubRoutines::x86::mxcsr_std())); __ bind(ok_ret); __ addptr(rsp, wordSize); __ pop(rax); } __ ret(0); return start; } address generate_f2i_fixup() { StubCodeMark mark(this, "StubRoutines", "f2i_fixup"); Address inout(rsp, 5 * wordSize); // return address + 4 saves address start = __ pc(); Label L; __ push(rax); __ push(c_rarg3); __ push(c_rarg2); __ push(c_rarg1); __ movl(rax, 0x7f800000); __ xorl(c_rarg3, c_rarg3); __ movl(c_rarg2, inout); __ movl(c_rarg1, c_rarg2); __ andl(c_rarg1, 0x7fffffff); __ cmpl(rax, c_rarg1); // NaN? -> 0 __ jcc(Assembler::negative, L); __ testl(c_rarg2, c_rarg2); // signed ? min_jint : max_jint __ movl(c_rarg3, 0x80000000); __ movl(rax, 0x7fffffff); __ cmovl(Assembler::positive, c_rarg3, rax); __ bind(L); __ movptr(inout, c_rarg3); __ pop(c_rarg1); __ pop(c_rarg2); __ pop(c_rarg3); __ pop(rax); __ ret(0); return start; } address generate_f2l_fixup() { StubCodeMark mark(this, "StubRoutines", "f2l_fixup"); Address inout(rsp, 5 * wordSize); // return address + 4 saves address start = __ pc(); Label L; __ push(rax); __ push(c_rarg3); __ push(c_rarg2); __ push(c_rarg1); __ movl(rax, 0x7f800000); __ xorl(c_rarg3, c_rarg3); __ movl(c_rarg2, inout); __ movl(c_rarg1, c_rarg2); __ andl(c_rarg1, 0x7fffffff); __ cmpl(rax, c_rarg1); // NaN? -> 0 __ jcc(Assembler::negative, L); __ testl(c_rarg2, c_rarg2); // signed ? min_jlong : max_jlong __ mov64(c_rarg3, 0x8000000000000000); __ mov64(rax, 0x7fffffffffffffff); __ cmov(Assembler::positive, c_rarg3, rax); __ bind(L); __ movptr(inout, c_rarg3); __ pop(c_rarg1); __ pop(c_rarg2); __ pop(c_rarg3); __ pop(rax); __ ret(0); return start; } address generate_d2i_fixup() { StubCodeMark mark(this, "StubRoutines", "d2i_fixup"); Address inout(rsp, 6 * wordSize); // return address + 5 saves address start = __ pc(); Label L; __ push(rax); __ push(c_rarg3); __ push(c_rarg2); __ push(c_rarg1); __ push(c_rarg0); __ movl(rax, 0x7ff00000); __ movq(c_rarg2, inout); __ movl(c_rarg3, c_rarg2); __ mov(c_rarg1, c_rarg2); __ mov(c_rarg0, c_rarg2); __ negl(c_rarg3); __ shrptr(c_rarg1, 0x20); __ orl(c_rarg3, c_rarg2); __ andl(c_rarg1, 0x7fffffff); __ xorl(c_rarg2, c_rarg2); __ shrl(c_rarg3, 0x1f); __ orl(c_rarg1, c_rarg3); __ cmpl(rax, c_rarg1); __ jcc(Assembler::negative, L); // NaN -> 0 __ testptr(c_rarg0, c_rarg0); // signed ? min_jint : max_jint __ movl(c_rarg2, 0x80000000); __ movl(rax, 0x7fffffff); __ cmov(Assembler::positive, c_rarg2, rax); __ bind(L); __ movptr(inout, c_rarg2); __ pop(c_rarg0); __ pop(c_rarg1); __ pop(c_rarg2); __ pop(c_rarg3); __ pop(rax); __ ret(0); return start; } address generate_d2l_fixup() { StubCodeMark mark(this, "StubRoutines", "d2l_fixup"); Address inout(rsp, 6 * wordSize); // return address + 5 saves address start = __ pc(); Label L; __ push(rax); __ push(c_rarg3); __ push(c_rarg2); __ push(c_rarg1); __ push(c_rarg0); __ movl(rax, 0x7ff00000); __ movq(c_rarg2, inout); __ movl(c_rarg3, c_rarg2); __ mov(c_rarg1, c_rarg2); __ mov(c_rarg0, c_rarg2); __ negl(c_rarg3); __ shrptr(c_rarg1, 0x20); __ orl(c_rarg3, c_rarg2); __ andl(c_rarg1, 0x7fffffff); __ xorl(c_rarg2, c_rarg2); __ shrl(c_rarg3, 0x1f); __ orl(c_rarg1, c_rarg3); __ cmpl(rax, c_rarg1); __ jcc(Assembler::negative, L); // NaN -> 0 __ testq(c_rarg0, c_rarg0); // signed ? min_jlong : max_jlong __ mov64(c_rarg2, 0x8000000000000000); __ mov64(rax, 0x7fffffffffffffff); __ cmovq(Assembler::positive, c_rarg2, rax); __ bind(L); __ movq(inout, c_rarg2); __ pop(c_rarg0); __ pop(c_rarg1); __ pop(c_rarg2); __ pop(c_rarg3); __ pop(rax); __ ret(0); return start; } address generate_fp_mask(const char *stub_name, int64_t mask) { __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", stub_name); address start = __ pc(); __ emit_data64( mask, relocInfo::none ); __ emit_data64( mask, relocInfo::none ); return start; } // The following routine generates a subroutine to throw an // asynchronous UnknownError when an unsafe access gets a fault that // could not be reasonably prevented by the programmer. (Example: // SIGBUS/OBJERR.) address generate_handler_for_unsafe_access() { StubCodeMark mark(this, "StubRoutines", "handler_for_unsafe_access"); address start = __ pc(); __ push(0); // hole for return address-to-be __ pusha(); // push registers Address next_pc(rsp, RegisterImpl::number_of_registers * BytesPerWord); // FIXME: this probably needs alignment logic __ subptr(rsp, frame::arg_reg_save_area_bytes); BLOCK_COMMENT("call handle_unsafe_access"); __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, handle_unsafe_access))); __ addptr(rsp, frame::arg_reg_save_area_bytes); __ movptr(next_pc, rax); // stuff next address __ popa(); __ ret(0); // jump to next address return start; } // Non-destructive plausibility checks for oops // // Arguments: // all args on stack! // // Stack after saving c_rarg3: // [tos + 0]: saved c_rarg3 // [tos + 1]: saved c_rarg2 // [tos + 2]: saved r12 (several TemplateTable methods use it) // [tos + 3]: saved flags // [tos + 4]: return address // * [tos + 5]: error message (char*) // * [tos + 6]: object to verify (oop) // * [tos + 7]: saved rax - saved by caller and bashed // * [tos + 8]: saved r10 (rscratch1) - saved by caller // * = popped on exit address generate_verify_oop() { StubCodeMark mark(this, "StubRoutines", "verify_oop"); address start = __ pc(); Label exit, error; __ pushf(); __ incrementl(ExternalAddress((address) StubRoutines::verify_oop_count_addr())); __ push(r12); // save c_rarg2 and c_rarg3 __ push(c_rarg2); __ push(c_rarg3); enum { // After previous pushes. oop_to_verify = 6 * wordSize, saved_rax = 7 * wordSize, saved_r10 = 8 * wordSize, // Before the call to MacroAssembler::debug(), see below. return_addr = 16 * wordSize, error_msg = 17 * wordSize }; // get object __ movptr(rax, Address(rsp, oop_to_verify)); // make sure object is 'reasonable' __ testptr(rax, rax); __ jcc(Assembler::zero, exit); // if obj is NULL it is OK // Check if the oop is in the right area of memory __ movptr(c_rarg2, rax); __ movptr(c_rarg3, (intptr_t) Universe::verify_oop_mask()); __ andptr(c_rarg2, c_rarg3); __ movptr(c_rarg3, (intptr_t) Universe::verify_oop_bits()); __ cmpptr(c_rarg2, c_rarg3); __ jcc(Assembler::notZero, error); // set r12 to heapbase for load_klass() __ reinit_heapbase(); // make sure klass is 'reasonable' __ load_klass(rax, rax); // get klass __ testptr(rax, rax); __ jcc(Assembler::zero, error); // if klass is NULL it is broken // Check if the klass is in the right area of memory __ mov(c_rarg2, rax); __ movptr(c_rarg3, (intptr_t) Universe::verify_klass_mask()); __ andptr(c_rarg2, c_rarg3); __ movptr(c_rarg3, (intptr_t) Universe::verify_klass_bits()); __ cmpptr(c_rarg2, c_rarg3); __ jcc(Assembler::notZero, error); // make sure klass' klass is 'reasonable' __ load_klass(rax, rax); __ testptr(rax, rax); __ jcc(Assembler::zero, error); // if klass' klass is NULL it is broken // Check if the klass' klass is in the right area of memory __ movptr(c_rarg3, (intptr_t) Universe::verify_klass_mask()); __ andptr(rax, c_rarg3); __ movptr(c_rarg3, (intptr_t) Universe::verify_klass_bits()); __ cmpptr(rax, c_rarg3); __ jcc(Assembler::notZero, error); // return if everything seems ok __ bind(exit); __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back __ pop(c_rarg3); // restore c_rarg3 __ pop(c_rarg2); // restore c_rarg2 __ pop(r12); // restore r12 __ popf(); // restore flags __ ret(4 * wordSize); // pop caller saved stuff // handle errors __ bind(error); __ movptr(rax, Address(rsp, saved_rax)); // get saved rax back __ movptr(rscratch1, Address(rsp, saved_r10)); // get saved r10 back __ pop(c_rarg3); // get saved c_rarg3 back __ pop(c_rarg2); // get saved c_rarg2 back __ pop(r12); // get saved r12 back __ popf(); // get saved flags off stack -- // will be ignored __ pusha(); // push registers // (rip is already // already pushed) // debug(char* msg, int64_t pc, int64_t regs[]) // We've popped the registers we'd saved (c_rarg3, c_rarg2 and flags), and // pushed all the registers, so now the stack looks like: // [tos + 0] 16 saved registers // [tos + 16] return address // * [tos + 17] error message (char*) // * [tos + 18] object to verify (oop) // * [tos + 19] saved rax - saved by caller and bashed // * [tos + 20] saved r10 (rscratch1) - saved by caller // * = popped on exit __ movptr(c_rarg0, Address(rsp, error_msg)); // pass address of error message __ movptr(c_rarg1, Address(rsp, return_addr)); // pass return address __ movq(c_rarg2, rsp); // pass address of regs on stack __ mov(r12, rsp); // remember rsp __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows __ andptr(rsp, -16); // align stack as required by ABI BLOCK_COMMENT("call MacroAssembler::debug"); __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, MacroAssembler::debug64))); __ mov(rsp, r12); // restore rsp __ popa(); // pop registers (includes r12) __ ret(4 * wordSize); // pop caller saved stuff return start; } // // Verify that a register contains clean 32-bits positive value // (high 32-bits are 0) so it could be used in 64-bits shifts. // // Input: // Rint - 32-bits value // Rtmp - scratch // void assert_clean_int(Register Rint, Register Rtmp) { #ifdef ASSERT Label L; assert_different_registers(Rtmp, Rint); __ movslq(Rtmp, Rint); __ cmpq(Rtmp, Rint); __ jcc(Assembler::equal, L); __ stop("high 32-bits of int value are not 0"); __ bind(L); #endif } // Generate overlap test for array copy stubs // // Input: // c_rarg0 - from // c_rarg1 - to // c_rarg2 - element count // // Output: // rax - &from[element count - 1] // void array_overlap_test(address no_overlap_target, Address::ScaleFactor sf) { assert(no_overlap_target != NULL, "must be generated"); array_overlap_test(no_overlap_target, NULL, sf); } void array_overlap_test(Label& L_no_overlap, Address::ScaleFactor sf) { array_overlap_test(NULL, &L_no_overlap, sf); } void array_overlap_test(address no_overlap_target, Label* NOLp, Address::ScaleFactor sf) { const Register from = c_rarg0; const Register to = c_rarg1; const Register count = c_rarg2; const Register end_from = rax; __ cmpptr(to, from); __ lea(end_from, Address(from, count, sf, 0)); if (NOLp == NULL) { ExternalAddress no_overlap(no_overlap_target); __ jump_cc(Assembler::belowEqual, no_overlap); __ cmpptr(to, end_from); __ jump_cc(Assembler::aboveEqual, no_overlap); } else { __ jcc(Assembler::belowEqual, (*NOLp)); __ cmpptr(to, end_from); __ jcc(Assembler::aboveEqual, (*NOLp)); } } // Shuffle first three arg regs on Windows into Linux/Solaris locations. // // Outputs: // rdi - rcx // rsi - rdx // rdx - r8 // rcx - r9 // // Registers r9 and r10 are used to save rdi and rsi on Windows, which latter // are non-volatile. r9 and r10 should not be used by the caller. // void setup_arg_regs(int nargs = 3) { const Register saved_rdi = r9; const Register saved_rsi = r10; assert(nargs == 3 || nargs == 4, "else fix"); #ifdef _WIN64 assert(c_rarg0 == rcx && c_rarg1 == rdx && c_rarg2 == r8 && c_rarg3 == r9, "unexpected argument registers"); if (nargs >= 4) __ mov(rax, r9); // r9 is also saved_rdi __ movptr(saved_rdi, rdi); __ movptr(saved_rsi, rsi); __ mov(rdi, rcx); // c_rarg0 __ mov(rsi, rdx); // c_rarg1 __ mov(rdx, r8); // c_rarg2 if (nargs >= 4) __ mov(rcx, rax); // c_rarg3 (via rax) #else assert(c_rarg0 == rdi && c_rarg1 == rsi && c_rarg2 == rdx && c_rarg3 == rcx, "unexpected argument registers"); #endif } void restore_arg_regs() { const Register saved_rdi = r9; const Register saved_rsi = r10; #ifdef _WIN64 __ movptr(rdi, saved_rdi); __ movptr(rsi, saved_rsi); #endif } // Generate code for an array write pre barrier // // addr - starting address // count - element count // tmp - scratch register // // Destroy no registers! // void gen_write_ref_array_pre_barrier(Register addr, Register count, bool dest_uninitialized) { BarrierSet* bs = Universe::heap()->barrier_set(); switch (bs->kind()) { case BarrierSet::G1SATBCT: case BarrierSet::G1SATBCTLogging: // With G1, don't generate the call if we statically know that the target in uninitialized if (!dest_uninitialized) { __ pusha(); // push registers if (count == c_rarg0) { if (addr == c_rarg1) { // exactly backwards!! __ xchgptr(c_rarg1, c_rarg0); } else { __ movptr(c_rarg1, count); __ movptr(c_rarg0, addr); } } else { __ movptr(c_rarg0, addr); __ movptr(c_rarg1, count); } __ call_VM_leaf(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_pre), 2); __ popa(); } break; case BarrierSet::CardTableModRef: case BarrierSet::CardTableExtension: case BarrierSet::ModRef: break; default: ShouldNotReachHere(); } } // // Generate code for an array write post barrier // // Input: // start - register containing starting address of destination array // end - register containing ending address of destination array // scratch - scratch register // // The input registers are overwritten. // The ending address is inclusive. void gen_write_ref_array_post_barrier(Register start, Register end, Register scratch) { assert_different_registers(start, end, scratch); BarrierSet* bs = Universe::heap()->barrier_set(); switch (bs->kind()) { case BarrierSet::G1SATBCT: case BarrierSet::G1SATBCTLogging: { __ pusha(); // push registers (overkill) // must compute element count unless barrier set interface is changed (other platforms supply count) assert_different_registers(start, end, scratch); __ lea(scratch, Address(end, BytesPerHeapOop)); __ subptr(scratch, start); // subtract start to get #bytes __ shrptr(scratch, LogBytesPerHeapOop); // convert to element count __ mov(c_rarg0, start); __ mov(c_rarg1, scratch); __ call_VM_leaf(CAST_FROM_FN_PTR(address, BarrierSet::static_write_ref_array_post), 2); __ popa(); } break; case BarrierSet::CardTableModRef: case BarrierSet::CardTableExtension: { CardTableModRefBS* ct = (CardTableModRefBS*)bs; assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code"); Label L_loop; __ shrptr(start, CardTableModRefBS::card_shift); __ addptr(end, BytesPerHeapOop); __ shrptr(end, CardTableModRefBS::card_shift); __ subptr(end, start); // number of bytes to copy intptr_t disp = (intptr_t) ct->byte_map_base; if (__ is_simm32(disp)) { Address cardtable(noreg, noreg, Address::no_scale, disp); __ lea(scratch, cardtable); } else { ExternalAddress cardtable((address)disp); __ lea(scratch, cardtable); } const Register count = end; // 'end' register contains bytes count now __ addptr(start, scratch); __ BIND(L_loop); __ movb(Address(start, count, Address::times_1), 0); __ decrement(count); __ jcc(Assembler::greaterEqual, L_loop); } break; default: ShouldNotReachHere(); } } // Copy big chunks forward // // Inputs: // end_from - source arrays end address // end_to - destination array end address // qword_count - 64-bits element count, negative // to - scratch // L_copy_32_bytes - entry label // L_copy_8_bytes - exit label // void copy_32_bytes_forward(Register end_from, Register end_to, Register qword_count, Register to, Label& L_copy_32_bytes, Label& L_copy_8_bytes) { DEBUG_ONLY(__ stop("enter at entry label, not here")); Label L_loop; __ align(OptoLoopAlignment); __ BIND(L_loop); if(UseUnalignedLoadStores) { __ movdqu(xmm0, Address(end_from, qword_count, Address::times_8, -24)); __ movdqu(Address(end_to, qword_count, Address::times_8, -24), xmm0); __ movdqu(xmm1, Address(end_from, qword_count, Address::times_8, - 8)); __ movdqu(Address(end_to, qword_count, Address::times_8, - 8), xmm1); } else { __ movq(to, Address(end_from, qword_count, Address::times_8, -24)); __ movq(Address(end_to, qword_count, Address::times_8, -24), to); __ movq(to, Address(end_from, qword_count, Address::times_8, -16)); __ movq(Address(end_to, qword_count, Address::times_8, -16), to); __ movq(to, Address(end_from, qword_count, Address::times_8, - 8)); __ movq(Address(end_to, qword_count, Address::times_8, - 8), to); __ movq(to, Address(end_from, qword_count, Address::times_8, - 0)); __ movq(Address(end_to, qword_count, Address::times_8, - 0), to); } __ BIND(L_copy_32_bytes); __ addptr(qword_count, 4); __ jcc(Assembler::lessEqual, L_loop); __ subptr(qword_count, 4); __ jcc(Assembler::less, L_copy_8_bytes); // Copy trailing qwords } // Copy big chunks backward // // Inputs: // from - source arrays address // dest - destination array address // qword_count - 64-bits element count // to - scratch // L_copy_32_bytes - entry label // L_copy_8_bytes - exit label // void copy_32_bytes_backward(Register from, Register dest, Register qword_count, Register to, Label& L_copy_32_bytes, Label& L_copy_8_bytes) { DEBUG_ONLY(__ stop("enter at entry label, not here")); Label L_loop; __ align(OptoLoopAlignment); __ BIND(L_loop); if(UseUnalignedLoadStores) { __ movdqu(xmm0, Address(from, qword_count, Address::times_8, 16)); __ movdqu(Address(dest, qword_count, Address::times_8, 16), xmm0); __ movdqu(xmm1, Address(from, qword_count, Address::times_8, 0)); __ movdqu(Address(dest, qword_count, Address::times_8, 0), xmm1); } else { __ movq(to, Address(from, qword_count, Address::times_8, 24)); __ movq(Address(dest, qword_count, Address::times_8, 24), to); __ movq(to, Address(from, qword_count, Address::times_8, 16)); __ movq(Address(dest, qword_count, Address::times_8, 16), to); __ movq(to, Address(from, qword_count, Address::times_8, 8)); __ movq(Address(dest, qword_count, Address::times_8, 8), to); __ movq(to, Address(from, qword_count, Address::times_8, 0)); __ movq(Address(dest, qword_count, Address::times_8, 0), to); } __ BIND(L_copy_32_bytes); __ subptr(qword_count, 4); __ jcc(Assembler::greaterEqual, L_loop); __ addptr(qword_count, 4); __ jcc(Assembler::greater, L_copy_8_bytes); // Copy trailing qwords } // Arguments: // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary // ignored // name - stub name string // // Inputs: // c_rarg0 - source array address // c_rarg1 - destination array address // c_rarg2 - element count, treated as ssize_t, can be zero // // If 'from' and/or 'to' are aligned on 4-, 2-, or 1-byte boundaries, // we let the hardware handle it. The one to eight bytes within words, // dwords or qwords that span cache line boundaries will still be loaded // and stored atomically. // // Side Effects: // disjoint_byte_copy_entry is set to the no-overlap entry point // used by generate_conjoint_byte_copy(). // address generate_disjoint_byte_copy(bool aligned, address* entry, const char *name) { __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", name); address start = __ pc(); Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes, L_copy_2_bytes; Label L_copy_byte, L_exit; const Register from = rdi; // source array address const Register to = rsi; // destination array address const Register count = rdx; // elements count const Register byte_count = rcx; const Register qword_count = count; const Register end_from = from; // source array end address const Register end_to = to; // destination array end address // End pointers are inclusive, and if count is not zero they point // to the last unit copied: end_to[0] := end_from[0] __ enter(); // required for proper stackwalking of RuntimeStub frame assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. if (entry != NULL) { *entry = __ pc(); // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) BLOCK_COMMENT("Entry:"); } setup_arg_regs(); // from => rdi, to => rsi, count => rdx // r9 and r10 may be used to save non-volatile registers // 'from', 'to' and 'count' are now valid __ movptr(byte_count, count); __ shrptr(count, 3); // count => qword_count // Copy from low to high addresses. Use 'to' as scratch. __ lea(end_from, Address(from, qword_count, Address::times_8, -8)); __ lea(end_to, Address(to, qword_count, Address::times_8, -8)); __ negptr(qword_count); // make the count negative __ jmp(L_copy_32_bytes); // Copy trailing qwords __ BIND(L_copy_8_bytes); __ movq(rax, Address(end_from, qword_count, Address::times_8, 8)); __ movq(Address(end_to, qword_count, Address::times_8, 8), rax); __ increment(qword_count); __ jcc(Assembler::notZero, L_copy_8_bytes); // Check for and copy trailing dword __ BIND(L_copy_4_bytes); __ testl(byte_count, 4); __ jccb(Assembler::zero, L_copy_2_bytes); __ movl(rax, Address(end_from, 8)); __ movl(Address(end_to, 8), rax); __ addptr(end_from, 4); __ addptr(end_to, 4); // Check for and copy trailing word __ BIND(L_copy_2_bytes); __ testl(byte_count, 2); __ jccb(Assembler::zero, L_copy_byte); __ movw(rax, Address(end_from, 8)); __ movw(Address(end_to, 8), rax); __ addptr(end_from, 2); __ addptr(end_to, 2); // Check for and copy trailing byte __ BIND(L_copy_byte); __ testl(byte_count, 1); __ jccb(Assembler::zero, L_exit); __ movb(rax, Address(end_from, 8)); __ movb(Address(end_to, 8), rax); __ BIND(L_exit); inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr); restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); // Copy in 32-bytes chunks copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); __ jmp(L_copy_4_bytes); return start; } // Arguments: // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary // ignored // name - stub name string // // Inputs: // c_rarg0 - source array address // c_rarg1 - destination array address // c_rarg2 - element count, treated as ssize_t, can be zero // // If 'from' and/or 'to' are aligned on 4-, 2-, or 1-byte boundaries, // we let the hardware handle it. The one to eight bytes within words, // dwords or qwords that span cache line boundaries will still be loaded // and stored atomically. // address generate_conjoint_byte_copy(bool aligned, address nooverlap_target, address* entry, const char *name) { __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", name); address start = __ pc(); Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes, L_copy_2_bytes; const Register from = rdi; // source array address const Register to = rsi; // destination array address const Register count = rdx; // elements count const Register byte_count = rcx; const Register qword_count = count; __ enter(); // required for proper stackwalking of RuntimeStub frame assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. if (entry != NULL) { *entry = __ pc(); // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) BLOCK_COMMENT("Entry:"); } array_overlap_test(nooverlap_target, Address::times_1); setup_arg_regs(); // from => rdi, to => rsi, count => rdx // r9 and r10 may be used to save non-volatile registers // 'from', 'to' and 'count' are now valid __ movptr(byte_count, count); __ shrptr(count, 3); // count => qword_count // Copy from high to low addresses. // Check for and copy trailing byte __ testl(byte_count, 1); __ jcc(Assembler::zero, L_copy_2_bytes); __ movb(rax, Address(from, byte_count, Address::times_1, -1)); __ movb(Address(to, byte_count, Address::times_1, -1), rax); __ decrement(byte_count); // Adjust for possible trailing word // Check for and copy trailing word __ BIND(L_copy_2_bytes); __ testl(byte_count, 2); __ jcc(Assembler::zero, L_copy_4_bytes); __ movw(rax, Address(from, byte_count, Address::times_1, -2)); __ movw(Address(to, byte_count, Address::times_1, -2), rax); // Check for and copy trailing dword __ BIND(L_copy_4_bytes); __ testl(byte_count, 4); __ jcc(Assembler::zero, L_copy_32_bytes); __ movl(rax, Address(from, qword_count, Address::times_8)); __ movl(Address(to, qword_count, Address::times_8), rax); __ jmp(L_copy_32_bytes); // Copy trailing qwords __ BIND(L_copy_8_bytes); __ movq(rax, Address(from, qword_count, Address::times_8, -8)); __ movq(Address(to, qword_count, Address::times_8, -8), rax); __ decrement(qword_count); __ jcc(Assembler::notZero, L_copy_8_bytes); inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr); restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); // Copy in 32-bytes chunks copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); inc_counter_np(SharedRuntime::_jbyte_array_copy_ctr); restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); return start; } // Arguments: // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary // ignored // name - stub name string // // Inputs: // c_rarg0 - source array address // c_rarg1 - destination array address // c_rarg2 - element count, treated as ssize_t, can be zero // // If 'from' and/or 'to' are aligned on 4- or 2-byte boundaries, we // let the hardware handle it. The two or four words within dwords // or qwords that span cache line boundaries will still be loaded // and stored atomically. // // Side Effects: // disjoint_short_copy_entry is set to the no-overlap entry point // used by generate_conjoint_short_copy(). // address generate_disjoint_short_copy(bool aligned, address *entry, const char *name) { __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", name); address start = __ pc(); Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes,L_copy_2_bytes,L_exit; const Register from = rdi; // source array address const Register to = rsi; // destination array address const Register count = rdx; // elements count const Register word_count = rcx; const Register qword_count = count; const Register end_from = from; // source array end address const Register end_to = to; // destination array end address // End pointers are inclusive, and if count is not zero they point // to the last unit copied: end_to[0] := end_from[0] __ enter(); // required for proper stackwalking of RuntimeStub frame assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. if (entry != NULL) { *entry = __ pc(); // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) BLOCK_COMMENT("Entry:"); } setup_arg_regs(); // from => rdi, to => rsi, count => rdx // r9 and r10 may be used to save non-volatile registers // 'from', 'to' and 'count' are now valid __ movptr(word_count, count); __ shrptr(count, 2); // count => qword_count // Copy from low to high addresses. Use 'to' as scratch. __ lea(end_from, Address(from, qword_count, Address::times_8, -8)); __ lea(end_to, Address(to, qword_count, Address::times_8, -8)); __ negptr(qword_count); __ jmp(L_copy_32_bytes); // Copy trailing qwords __ BIND(L_copy_8_bytes); __ movq(rax, Address(end_from, qword_count, Address::times_8, 8)); __ movq(Address(end_to, qword_count, Address::times_8, 8), rax); __ increment(qword_count); __ jcc(Assembler::notZero, L_copy_8_bytes); // Original 'dest' is trashed, so we can't use it as a // base register for a possible trailing word copy // Check for and copy trailing dword __ BIND(L_copy_4_bytes); __ testl(word_count, 2); __ jccb(Assembler::zero, L_copy_2_bytes); __ movl(rax, Address(end_from, 8)); __ movl(Address(end_to, 8), rax); __ addptr(end_from, 4); __ addptr(end_to, 4); // Check for and copy trailing word __ BIND(L_copy_2_bytes); __ testl(word_count, 1); __ jccb(Assembler::zero, L_exit); __ movw(rax, Address(end_from, 8)); __ movw(Address(end_to, 8), rax); __ BIND(L_exit); inc_counter_np(SharedRuntime::_jshort_array_copy_ctr); restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); // Copy in 32-bytes chunks copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); __ jmp(L_copy_4_bytes); return start; } address generate_fill(BasicType t, bool aligned, const char *name) { __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", name); address start = __ pc(); BLOCK_COMMENT("Entry:"); const Register to = c_rarg0; // source array address const Register value = c_rarg1; // value const Register count = c_rarg2; // elements count __ enter(); // required for proper stackwalking of RuntimeStub frame __ generate_fill(t, aligned, to, value, count, rax, xmm0); __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); return start; } // Arguments: // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary // ignored // name - stub name string // // Inputs: // c_rarg0 - source array address // c_rarg1 - destination array address // c_rarg2 - element count, treated as ssize_t, can be zero // // If 'from' and/or 'to' are aligned on 4- or 2-byte boundaries, we // let the hardware handle it. The two or four words within dwords // or qwords that span cache line boundaries will still be loaded // and stored atomically. // address generate_conjoint_short_copy(bool aligned, address nooverlap_target, address *entry, const char *name) { __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", name); address start = __ pc(); Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes; const Register from = rdi; // source array address const Register to = rsi; // destination array address const Register count = rdx; // elements count const Register word_count = rcx; const Register qword_count = count; __ enter(); // required for proper stackwalking of RuntimeStub frame assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. if (entry != NULL) { *entry = __ pc(); // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) BLOCK_COMMENT("Entry:"); } array_overlap_test(nooverlap_target, Address::times_2); setup_arg_regs(); // from => rdi, to => rsi, count => rdx // r9 and r10 may be used to save non-volatile registers // 'from', 'to' and 'count' are now valid __ movptr(word_count, count); __ shrptr(count, 2); // count => qword_count // Copy from high to low addresses. Use 'to' as scratch. // Check for and copy trailing word __ testl(word_count, 1); __ jccb(Assembler::zero, L_copy_4_bytes); __ movw(rax, Address(from, word_count, Address::times_2, -2)); __ movw(Address(to, word_count, Address::times_2, -2), rax); // Check for and copy trailing dword __ BIND(L_copy_4_bytes); __ testl(word_count, 2); __ jcc(Assembler::zero, L_copy_32_bytes); __ movl(rax, Address(from, qword_count, Address::times_8)); __ movl(Address(to, qword_count, Address::times_8), rax); __ jmp(L_copy_32_bytes); // Copy trailing qwords __ BIND(L_copy_8_bytes); __ movq(rax, Address(from, qword_count, Address::times_8, -8)); __ movq(Address(to, qword_count, Address::times_8, -8), rax); __ decrement(qword_count); __ jcc(Assembler::notZero, L_copy_8_bytes); inc_counter_np(SharedRuntime::_jshort_array_copy_ctr); restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); // Copy in 32-bytes chunks copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); inc_counter_np(SharedRuntime::_jshort_array_copy_ctr); restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); return start; } // Arguments: // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary // ignored // is_oop - true => oop array, so generate store check code // name - stub name string // // Inputs: // c_rarg0 - source array address // c_rarg1 - destination array address // c_rarg2 - element count, treated as ssize_t, can be zero // // If 'from' and/or 'to' are aligned on 4-byte boundaries, we let // the hardware handle it. The two dwords within qwords that span // cache line boundaries will still be loaded and stored atomicly. // // Side Effects: // disjoint_int_copy_entry is set to the no-overlap entry point // used by generate_conjoint_int_oop_copy(). // address generate_disjoint_int_oop_copy(bool aligned, bool is_oop, address* entry, const char *name, bool dest_uninitialized = false) { __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", name); address start = __ pc(); Label L_copy_32_bytes, L_copy_8_bytes, L_copy_4_bytes, L_exit; const Register from = rdi; // source array address const Register to = rsi; // destination array address const Register count = rdx; // elements count const Register dword_count = rcx; const Register qword_count = count; const Register end_from = from; // source array end address const Register end_to = to; // destination array end address const Register saved_to = r11; // saved destination array address // End pointers are inclusive, and if count is not zero they point // to the last unit copied: end_to[0] := end_from[0] __ enter(); // required for proper stackwalking of RuntimeStub frame assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. if (entry != NULL) { *entry = __ pc(); // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) BLOCK_COMMENT("Entry:"); } setup_arg_regs(); // from => rdi, to => rsi, count => rdx // r9 and r10 may be used to save non-volatile registers if (is_oop) { __ movq(saved_to, to); gen_write_ref_array_pre_barrier(to, count, dest_uninitialized); } // 'from', 'to' and 'count' are now valid __ movptr(dword_count, count); __ shrptr(count, 1); // count => qword_count // Copy from low to high addresses. Use 'to' as scratch. __ lea(end_from, Address(from, qword_count, Address::times_8, -8)); __ lea(end_to, Address(to, qword_count, Address::times_8, -8)); __ negptr(qword_count); __ jmp(L_copy_32_bytes); // Copy trailing qwords __ BIND(L_copy_8_bytes); __ movq(rax, Address(end_from, qword_count, Address::times_8, 8)); __ movq(Address(end_to, qword_count, Address::times_8, 8), rax); __ increment(qword_count); __ jcc(Assembler::notZero, L_copy_8_bytes); // Check for and copy trailing dword __ BIND(L_copy_4_bytes); __ testl(dword_count, 1); // Only byte test since the value is 0 or 1 __ jccb(Assembler::zero, L_exit); __ movl(rax, Address(end_from, 8)); __ movl(Address(end_to, 8), rax); __ BIND(L_exit); if (is_oop) { __ leaq(end_to, Address(saved_to, dword_count, Address::times_4, -4)); gen_write_ref_array_post_barrier(saved_to, end_to, rax); } inc_counter_np(SharedRuntime::_jint_array_copy_ctr); restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); // Copy 32-bytes chunks copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); __ jmp(L_copy_4_bytes); return start; } // Arguments: // aligned - true => Input and output aligned on a HeapWord == 8-byte boundary // ignored // is_oop - true => oop array, so generate store check code // name - stub name string // // Inputs: // c_rarg0 - source array address // c_rarg1 - destination array address // c_rarg2 - element count, treated as ssize_t, can be zero // // If 'from' and/or 'to' are aligned on 4-byte boundaries, we let // the hardware handle it. The two dwords within qwords that span // cache line boundaries will still be loaded and stored atomicly. // address generate_conjoint_int_oop_copy(bool aligned, bool is_oop, address nooverlap_target, address *entry, const char *name, bool dest_uninitialized = false) { __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", name); address start = __ pc(); Label L_copy_32_bytes, L_copy_8_bytes, L_copy_2_bytes, L_exit; const Register from = rdi; // source array address const Register to = rsi; // destination array address const Register count = rdx; // elements count const Register dword_count = rcx; const Register qword_count = count; __ enter(); // required for proper stackwalking of RuntimeStub frame assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. if (entry != NULL) { *entry = __ pc(); // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) BLOCK_COMMENT("Entry:"); } array_overlap_test(nooverlap_target, Address::times_4); setup_arg_regs(); // from => rdi, to => rsi, count => rdx // r9 and r10 may be used to save non-volatile registers if (is_oop) { // no registers are destroyed by this call gen_write_ref_array_pre_barrier(to, count, dest_uninitialized); } assert_clean_int(count, rax); // Make sure 'count' is clean int. // 'from', 'to' and 'count' are now valid __ movptr(dword_count, count); __ shrptr(count, 1); // count => qword_count // Copy from high to low addresses. Use 'to' as scratch. // Check for and copy trailing dword __ testl(dword_count, 1); __ jcc(Assembler::zero, L_copy_32_bytes); __ movl(rax, Address(from, dword_count, Address::times_4, -4)); __ movl(Address(to, dword_count, Address::times_4, -4), rax); __ jmp(L_copy_32_bytes); // Copy trailing qwords __ BIND(L_copy_8_bytes); __ movq(rax, Address(from, qword_count, Address::times_8, -8)); __ movq(Address(to, qword_count, Address::times_8, -8), rax); __ decrement(qword_count); __ jcc(Assembler::notZero, L_copy_8_bytes); inc_counter_np(SharedRuntime::_jint_array_copy_ctr); if (is_oop) { __ jmp(L_exit); } restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); // Copy in 32-bytes chunks copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); inc_counter_np(SharedRuntime::_jint_array_copy_ctr); __ bind(L_exit); if (is_oop) { Register end_to = rdx; __ leaq(end_to, Address(to, dword_count, Address::times_4, -4)); gen_write_ref_array_post_barrier(to, end_to, rax); } restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); return start; } // Arguments: // aligned - true => Input and output aligned on a HeapWord boundary == 8 bytes // ignored // is_oop - true => oop array, so generate store check code // name - stub name string // // Inputs: // c_rarg0 - source array address // c_rarg1 - destination array address // c_rarg2 - element count, treated as ssize_t, can be zero // // Side Effects: // disjoint_oop_copy_entry or disjoint_long_copy_entry is set to the // no-overlap entry point used by generate_conjoint_long_oop_copy(). // address generate_disjoint_long_oop_copy(bool aligned, bool is_oop, address *entry, const char *name, bool dest_uninitialized = false) { __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", name); address start = __ pc(); Label L_copy_32_bytes, L_copy_8_bytes, L_exit; const Register from = rdi; // source array address const Register to = rsi; // destination array address const Register qword_count = rdx; // elements count const Register end_from = from; // source array end address const Register end_to = rcx; // destination array end address const Register saved_to = to; // End pointers are inclusive, and if count is not zero they point // to the last unit copied: end_to[0] := end_from[0] __ enter(); // required for proper stackwalking of RuntimeStub frame // Save no-overlap entry point for generate_conjoint_long_oop_copy() assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. if (entry != NULL) { *entry = __ pc(); // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) BLOCK_COMMENT("Entry:"); } setup_arg_regs(); // from => rdi, to => rsi, count => rdx // r9 and r10 may be used to save non-volatile registers // 'from', 'to' and 'qword_count' are now valid if (is_oop) { // no registers are destroyed by this call gen_write_ref_array_pre_barrier(to, qword_count, dest_uninitialized); } // Copy from low to high addresses. Use 'to' as scratch. __ lea(end_from, Address(from, qword_count, Address::times_8, -8)); __ lea(end_to, Address(to, qword_count, Address::times_8, -8)); __ negptr(qword_count); __ jmp(L_copy_32_bytes); // Copy trailing qwords __ BIND(L_copy_8_bytes); __ movq(rax, Address(end_from, qword_count, Address::times_8, 8)); __ movq(Address(end_to, qword_count, Address::times_8, 8), rax); __ increment(qword_count); __ jcc(Assembler::notZero, L_copy_8_bytes); if (is_oop) { __ jmp(L_exit); } else { inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); } // Copy 64-byte chunks copy_32_bytes_forward(end_from, end_to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); if (is_oop) { __ BIND(L_exit); gen_write_ref_array_post_barrier(saved_to, end_to, rax); inc_counter_np(SharedRuntime::_oop_array_copy_ctr); } else { inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); } restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); return start; } // Arguments: // aligned - true => Input and output aligned on a HeapWord boundary == 8 bytes // ignored // is_oop - true => oop array, so generate store check code // name - stub name string // // Inputs: // c_rarg0 - source array address // c_rarg1 - destination array address // c_rarg2 - element count, treated as ssize_t, can be zero // address generate_conjoint_long_oop_copy(bool aligned, bool is_oop, address nooverlap_target, address *entry, const char *name, bool dest_uninitialized = false) { __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", name); address start = __ pc(); Label L_copy_32_bytes, L_copy_8_bytes, L_exit; const Register from = rdi; // source array address const Register to = rsi; // destination array address const Register qword_count = rdx; // elements count const Register saved_count = rcx; __ enter(); // required for proper stackwalking of RuntimeStub frame assert_clean_int(c_rarg2, rax); // Make sure 'count' is clean int. if (entry != NULL) { *entry = __ pc(); // caller can pass a 64-bit byte count here (from Unsafe.copyMemory) BLOCK_COMMENT("Entry:"); } array_overlap_test(nooverlap_target, Address::times_8); setup_arg_regs(); // from => rdi, to => rsi, count => rdx // r9 and r10 may be used to save non-volatile registers // 'from', 'to' and 'qword_count' are now valid if (is_oop) { // Save to and count for store barrier __ movptr(saved_count, qword_count); // No registers are destroyed by this call gen_write_ref_array_pre_barrier(to, saved_count, dest_uninitialized); } __ jmp(L_copy_32_bytes); // Copy trailing qwords __ BIND(L_copy_8_bytes); __ movq(rax, Address(from, qword_count, Address::times_8, -8)); __ movq(Address(to, qword_count, Address::times_8, -8), rax); __ decrement(qword_count); __ jcc(Assembler::notZero, L_copy_8_bytes); if (is_oop) { __ jmp(L_exit); } else { inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); } // Copy in 32-bytes chunks copy_32_bytes_backward(from, to, qword_count, rax, L_copy_32_bytes, L_copy_8_bytes); if (is_oop) { __ BIND(L_exit); __ lea(rcx, Address(to, saved_count, Address::times_8, -8)); gen_write_ref_array_post_barrier(to, rcx, rax); inc_counter_np(SharedRuntime::_oop_array_copy_ctr); } else { inc_counter_np(SharedRuntime::_jlong_array_copy_ctr); } restore_arg_regs(); __ xorptr(rax, rax); // return 0 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); return start; } // Helper for generating a dynamic type check. // Smashes no registers. void generate_type_check(Register sub_klass, Register super_check_offset, Register super_klass, Label& L_success) { assert_different_registers(sub_klass, super_check_offset, super_klass); BLOCK_COMMENT("type_check:"); Label L_miss; __ check_klass_subtype_fast_path(sub_klass, super_klass, noreg, &L_success, &L_miss, NULL, super_check_offset); __ check_klass_subtype_slow_path(sub_klass, super_klass, noreg, noreg, &L_success, NULL); // Fall through on failure! __ BIND(L_miss); } // // Generate checkcasting array copy stub // // Input: // c_rarg0 - source array address // c_rarg1 - destination array address // c_rarg2 - element count, treated as ssize_t, can be zero // c_rarg3 - size_t ckoff (super_check_offset) // not Win64 // c_rarg4 - oop ckval (super_klass) // Win64 // rsp+40 - oop ckval (super_klass) // // Output: // rax == 0 - success // rax == -1^K - failure, where K is partial transfer count // address generate_checkcast_copy(const char *name, address *entry, bool dest_uninitialized = false) { Label L_load_element, L_store_element, L_do_card_marks, L_done; // Input registers (after setup_arg_regs) const Register from = rdi; // source array address const Register to = rsi; // destination array address const Register length = rdx; // elements count const Register ckoff = rcx; // super_check_offset const Register ckval = r8; // super_klass // Registers used as temps (r13, r14 are save-on-entry) const Register end_from = from; // source array end address const Register end_to = r13; // destination array end address const Register count = rdx; // -(count_remaining) const Register r14_length = r14; // saved copy of length // End pointers are inclusive, and if length is not zero they point // to the last unit copied: end_to[0] := end_from[0] const Register rax_oop = rax; // actual oop copied const Register r11_klass = r11; // oop._klass //--------------------------------------------------------------- // Assembler stub will be used for this call to arraycopy // if the two arrays are subtypes of Object[] but the // destination array type is not equal to or a supertype // of the source type. Each element must be separately // checked. __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", name); address start = __ pc(); __ enter(); // required for proper stackwalking of RuntimeStub frame #ifdef ASSERT // caller guarantees that the arrays really are different // otherwise, we would have to make conjoint checks { Label L; array_overlap_test(L, TIMES_OOP); __ stop("checkcast_copy within a single array"); __ bind(L); } #endif //ASSERT setup_arg_regs(4); // from => rdi, to => rsi, length => rdx // ckoff => rcx, ckval => r8 // r9 and r10 may be used to save non-volatile registers #ifdef _WIN64 // last argument (#4) is on stack on Win64 __ movptr(ckval, Address(rsp, 6 * wordSize)); #endif // Caller of this entry point must set up the argument registers. if (entry != NULL) { *entry = __ pc(); BLOCK_COMMENT("Entry:"); } // allocate spill slots for r13, r14 enum { saved_r13_offset, saved_r14_offset, saved_rbp_offset }; __ subptr(rsp, saved_rbp_offset * wordSize); __ movptr(Address(rsp, saved_r13_offset * wordSize), r13); __ movptr(Address(rsp, saved_r14_offset * wordSize), r14); // check that int operands are properly extended to size_t assert_clean_int(length, rax); assert_clean_int(ckoff, rax); #ifdef ASSERT BLOCK_COMMENT("assert consistent ckoff/ckval"); // The ckoff and ckval must be mutually consistent, // even though caller generates both. { Label L; int sco_offset = (klassOopDesc::header_size() * HeapWordSize + Klass::super_check_offset_offset_in_bytes()); __ cmpl(ckoff, Address(ckval, sco_offset)); __ jcc(Assembler::equal, L); __ stop("super_check_offset inconsistent"); __ bind(L); } #endif //ASSERT // Loop-invariant addresses. They are exclusive end pointers. Address end_from_addr(from, length, TIMES_OOP, 0); Address end_to_addr(to, length, TIMES_OOP, 0); // Loop-variant addresses. They assume post-incremented count < 0. Address from_element_addr(end_from, count, TIMES_OOP, 0); Address to_element_addr(end_to, count, TIMES_OOP, 0); gen_write_ref_array_pre_barrier(to, count, dest_uninitialized); // Copy from low to high addresses, indexed from the end of each array. __ lea(end_from, end_from_addr); __ lea(end_to, end_to_addr); __ movptr(r14_length, length); // save a copy of the length assert(length == count, ""); // else fix next line: __ negptr(count); // negate and test the length __ jcc(Assembler::notZero, L_load_element); // Empty array: Nothing to do. __ xorptr(rax, rax); // return 0 on (trivial) success __ jmp(L_done); // ======== begin loop ======== // (Loop is rotated; its entry is L_load_element.) // Loop control: // for (count = -count; count != 0; count++) // Base pointers src, dst are biased by 8*(count-1),to last element. __ align(OptoLoopAlignment); __ BIND(L_store_element); __ store_heap_oop(to_element_addr, rax_oop); // store the oop __ increment(count); // increment the count toward zero __ jcc(Assembler::zero, L_do_card_marks); // ======== loop entry is here ======== __ BIND(L_load_element); __ load_heap_oop(rax_oop, from_element_addr); // load the oop __ testptr(rax_oop, rax_oop); __ jcc(Assembler::zero, L_store_element); __ load_klass(r11_klass, rax_oop);// query the object klass generate_type_check(r11_klass, ckoff, ckval, L_store_element); // ======== end loop ======== // It was a real error; we must depend on the caller to finish the job. // Register rdx = -1 * number of *remaining* oops, r14 = *total* oops. // Emit GC store barriers for the oops we have copied (r14 + rdx), // and report their number to the caller. assert_different_registers(rax, r14_length, count, to, end_to, rcx); __ lea(end_to, to_element_addr); __ addptr(end_to, -heapOopSize); // make an inclusive end pointer gen_write_ref_array_post_barrier(to, end_to, rscratch1); __ movptr(rax, r14_length); // original oops __ addptr(rax, count); // K = (original - remaining) oops __ notptr(rax); // report (-1^K) to caller __ jmp(L_done); // Come here on success only. __ BIND(L_do_card_marks); __ addptr(end_to, -heapOopSize); // make an inclusive end pointer gen_write_ref_array_post_barrier(to, end_to, rscratch1); __ xorptr(rax, rax); // return 0 on success // Common exit point (success or failure). __ BIND(L_done); __ movptr(r13, Address(rsp, saved_r13_offset * wordSize)); __ movptr(r14, Address(rsp, saved_r14_offset * wordSize)); inc_counter_np(SharedRuntime::_checkcast_array_copy_ctr); restore_arg_regs(); __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); return start; } // // Generate 'unsafe' array copy stub // Though just as safe as the other stubs, it takes an unscaled // size_t argument instead of an element count. // // Input: // c_rarg0 - source array address // c_rarg1 - destination array address // c_rarg2 - byte count, treated as ssize_t, can be zero // // Examines the alignment of the operands and dispatches // to a long, int, short, or byte copy loop. // address generate_unsafe_copy(const char *name, address byte_copy_entry, address short_copy_entry, address int_copy_entry, address long_copy_entry) { Label L_long_aligned, L_int_aligned, L_short_aligned; // Input registers (before setup_arg_regs) const Register from = c_rarg0; // source array address const Register to = c_rarg1; // destination array address const Register size = c_rarg2; // byte count (size_t) // Register used as a temp const Register bits = rax; // test copy of low bits __ align(CodeEntryAlignment); StubCodeMark mark(this, "StubRoutines", name); address start = __ pc(); __ enter(); // required for proper stackwalking of RuntimeStub frame // bump this on entry, not on exit: inc_counter_np(SharedRuntime::_unsafe_array_copy_ctr); __ mov(bits, from); __ orptr(bits, to); __ orptr(bits, size); __ testb(bits, BytesPerLong-1); __ jccb(Assembler::zero, L_long_aligned); __ testb(bits, BytesPerInt-1); __ jccb(Assembler::zero, L_int_aligned); __ testb(bits, BytesPerShort-1); __ jump_cc(Assembler::notZero, RuntimeAddress(byte_copy_entry)); __ BIND(L_short_aligned); __ shrptr(size, LogBytesPerShort); // size => short_count __ jump(RuntimeAddress(short_copy_entry)); __ BIND(L_int_aligned); __ shrptr(size, LogBytesPerInt); // size => int_count __ jump(RuntimeAddress(int_copy_entry)); __ BIND(L_long_aligned); __ shrptr(size, LogBytesPerLong); // size => qword_count __ jump(RuntimeAddress(long_copy_entry)); return start; } // Perform range checks on the proposed arraycopy. // Kills temp, but nothing else. // Also, clean the sign bits of src_pos and dst_pos. void arraycopy_range_checks(Register src, // source array oop (c_rarg0) Register src_pos, // source position (c_rarg1) Register dst, // destination array oo (c_rarg2) Register dst_pos, // destination position (c_rarg3) Register length, Register temp, Label& L_failed) { BLOCK_COMMENT("arraycopy_range_checks:"); // if (src_pos + length > arrayOop(src)->length()) FAIL; __ movl(temp, length); __ addl(temp, src_pos); // src_pos + length __ cmpl(temp, Address(src, arrayOopDesc::length_offset_in_bytes())); __ jcc(Assembler::above, L_failed); // if (dst_pos + length > arrayOop(dst)->length()) FAIL; __ movl(temp, length); __ addl(temp, dst_pos); // dst_pos + length __ cmpl(temp, Address(dst, arrayOopDesc::length_offset_in_bytes())); __ jcc(Assembler::above, L_failed); // Have to clean up high 32-bits of 'src_pos' and 'dst_pos'. // Move with sign extension can be used since they are positive. __ movslq(src_pos, src_pos); __ movslq(dst_pos, dst_pos); BLOCK_COMMENT("arraycopy_range_checks done"); } // // Generate generic array copy stubs // // Input: // c_rarg0 - src oop // c_rarg1 - src_pos (32-bits) // c_rarg2 - dst oop // c_rarg3 - dst_pos (32-bits) // not Win64 // c_rarg4 - element count (32-bits) // Win64 // rsp+40 - element count (32-bits) // // Output: // rax == 0 - success // rax == -1^K - failure, where K is partial transfer count // address generate_generic_copy(const char *name, address byte_copy_entry, address short_copy_entry, address int_copy_entry, address oop_copy_entry, address long_copy_entry, address checkcast_copy_entry) { Label L_failed, L_failed_0, L_objArray; Label L_copy_bytes, L_copy_shorts, L_copy_ints, L_copy_longs; // Input registers const Register src = c_rarg0; // source array oop const Register src_pos = c_rarg1; // source position const Register dst = c_rarg2; // destination array oop const Register dst_pos = c_rarg3; // destination position #ifndef _WIN64 const Register length = c_rarg4; #else const Address length(rsp, 6 * wordSize); // elements count is on stack on Win64 #endif { int modulus = CodeEntryAlignment; int target = modulus - 5; // 5 = sizeof jmp(L_failed) int advance = target - (__ offset() % modulus); if (advance < 0) advance += modulus; if (advance > 0) __ nop(advance); } StubCodeMark mark(this, "StubRoutines", name); // Short-hop target to L_failed. Makes for denser prologue code. __ BIND(L_failed_0); __ jmp(L_failed); assert(__ offset() % CodeEntryAlignment == 0, "no further alignment needed"); __ align(CodeEntryAlignment); address start = __ pc(); __ enter(); // required for proper stackwalking of RuntimeStub frame // bump this on entry, not on exit: inc_counter_np(SharedRuntime::_generic_array_copy_ctr); //----------------------------------------------------------------------- // Assembler stub will be used for this call to arraycopy // if the following conditions are met: // // (1) src and dst must not be null. // (2) src_pos must not be negative. // (3) dst_pos must not be negative. // (4) length must not be negative. // (5) src klass and dst klass should be the same and not NULL. // (6) src and dst should be arrays. // (7) src_pos + length must not exceed length of src. // (8) dst_pos + length must not exceed length of dst. // // if (src == NULL) return -1; __ testptr(src, src); // src oop size_t j1off = __ offset(); __ jccb(Assembler::zero, L_failed_0); // if (src_pos < 0) return -1; __ testl(src_pos, src_pos); // src_pos (32-bits) __ jccb(Assembler::negative, L_failed_0); // if (dst == NULL) return -1; __ testptr(dst, dst); // dst oop __ jccb(Assembler::zero, L_failed_0); // if (dst_pos < 0) return -1; __ testl(dst_pos, dst_pos); // dst_pos (32-bits) size_t j4off = __ offset(); __ jccb(Assembler::negative, L_failed_0); // The first four tests are very dense code, // but not quite dense enough to put four // jumps in a 16-byte instruction fetch buffer. // That's good, because some branch predicters // do not like jumps so close together. // Make sure of this. guarantee(((j1off ^ j4off) & ~15) != 0, "I$ line of 1st & 4th jumps"); // registers used as temp const Register r11_length = r11; // elements count to copy const Register r10_src_klass = r10; // array klass // if (length < 0) return -1; __ movl(r11_length, length); // length (elements count, 32-bits value) __ testl(r11_length, r11_length); __ jccb(Assembler::negative, L_failed_0); __ load_klass(r10_src_klass, src); #ifdef ASSERT // assert(src->klass() != NULL); { BLOCK_COMMENT("assert klasses not null {"); Label L1, L2; __ testptr(r10_src_klass, r10_src_klass); __ jcc(Assembler::notZero, L2); // it is broken if klass is NULL __ bind(L1); __ stop("broken null klass"); __ bind(L2); __ load_klass(rax, dst); __ cmpq(rax, 0); __ jcc(Assembler::equal, L1); // this would be broken also BLOCK_COMMENT("} assert klasses not null done"); } #endif // Load layout helper (32-bits) // // |array_tag| | header_size | element_type | |log2_element_size| // 32 30 24 16 8 2 0 // // array_tag: typeArray = 0x3, objArray = 0x2, non-array = 0x0 // const int lh_offset = klassOopDesc::header_size() * HeapWordSize + Klass::layout_helper_offset_in_bytes(); // Handle objArrays completely differently... const jint objArray_lh = Klass::array_layout_helper(T_OBJECT); __ cmpl(Address(r10_src_klass, lh_offset), objArray_lh); __ jcc(Assembler::equal, L_objArray); // if (src->klass() != dst->klass()) return -1; __ load_klass(rax, dst); __ cmpq(r10_src_klass, rax); __ jcc(Assembler::notEqual, L_failed); const Register rax_lh = rax; // layout helper __ movl(rax_lh, Address(r10_src_klass, lh_offset)); // if (!src->is_Array()) return -1; __ cmpl(rax_lh, Klass::_lh_neutral_value); __ jcc(Assembler::greaterEqual, L_failed); // At this point, it is known to be a typeArray (array_tag 0x3). #ifdef ASSERT { BLOCK_COMMENT("assert primitive array {"); Label L; __ cmpl(rax_lh, (Klass::_lh_array_tag_type_value << Klass::_lh_array_tag_shift)); __ jcc(Assembler::greaterEqual, L); __ stop("must be a primitive array"); __ bind(L); BLOCK_COMMENT("} assert primitive array done"); } #endif arraycopy_range_checks(src, src_pos, dst, dst_pos, r11_length, r10, L_failed); // typeArrayKlass // // src_addr = (src + array_header_in_bytes()) + (src_pos << log2elemsize); // dst_addr = (dst + array_header_in_bytes()) + (dst_pos << log2elemsize); // const Register r10_offset = r10; // array offset const Register rax_elsize = rax_lh; // element size __ movl(r10_offset, rax_lh); __ shrl(r10_offset, Klass::_lh_header_size_shift); __ andptr(r10_offset, Klass::_lh_header_size_mask); // array_offset __ addptr(src, r10_offset); // src array offset __ addptr(dst, r10_offset); // dst array offset BLOCK_COMMENT("choose copy loop based on element size"); __ andl(rax_lh, Klass::_lh_log2_element_size_mask); // rax_lh -> rax_elsize // next registers should be set before the jump to corresponding stub const Register from = c_rarg0; // source array address const Register to = c_rarg1; // destination array address const Register count = c_rarg2; // elements count // 'from', 'to', 'count' registers should be set in such order // since they are the same as 'src', 'src_pos', 'dst'. __ BIND(L_copy_bytes); __ cmpl(rax_elsize, 0); __ jccb(Assembler::notEqual, L_copy_shorts); __ lea(from, Address(src, src_pos, Address::times_1, 0));// src_addr __ lea(to, Address(dst, dst_pos, Address::times_1, 0));// dst_addr __ movl2ptr(count, r11_length); // length __ jump(RuntimeAddress(byte_copy_entry)); __ BIND(L_copy_shorts); __ cmpl(rax_elsize, LogBytesPerShort); __ jccb(Assembler::notEqual, L_copy_ints); __ lea(from, Address(src, src_pos, Address::times_2, 0));// src_addr __ lea(to, Address(dst, dst_pos, Address::times_2, 0));// dst_addr __ movl2ptr(count, r11_length); // length __ jump(RuntimeAddress(short_copy_entry)); __ BIND(L_copy_ints); __ cmpl(rax_elsize, LogBytesPerInt); __ jccb(Assembler::notEqual, L_copy_longs); __ lea(from, Address(src, src_pos, Address::times_4, 0));// src_addr __ lea(to, Address(dst, dst_pos, Address::times_4, 0));// dst_addr __ movl2ptr(count, r11_length); // length __ jump(RuntimeAddress(int_copy_entry)); __ BIND(L_copy_longs); #ifdef ASSERT { BLOCK_COMMENT("assert long copy {"); Label L; __ cmpl(rax_elsize, LogBytesPerLong); __ jcc(Assembler::equal, L); __ stop("must be long copy, but elsize is wrong"); __ bind(L); BLOCK_COMMENT("} assert long copy done"); } #endif __ lea(from, Address(src, src_pos, Address::times_8, 0));// src_addr __ lea(to, Address(dst, dst_pos, Address::times_8, 0));// dst_addr __ movl2ptr(count, r11_length); // length __ jump(RuntimeAddress(long_copy_entry)); // objArrayKlass __ BIND(L_objArray); // live at this point: r10_src_klass, r11_length, src[_pos], dst[_pos] Label L_plain_copy, L_checkcast_copy; // test array classes for subtyping __ load_klass(rax, dst); __ cmpq(r10_src_klass, rax); // usual case is exact equality __ jcc(Assembler::notEqual, L_checkcast_copy); // Identically typed arrays can be copied without element-wise checks. arraycopy_range_checks(src, src_pos, dst, dst_pos, r11_length, r10, L_failed); __ lea(from, Address(src, src_pos, TIMES_OOP, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // src_addr __ lea(to, Address(dst, dst_pos, TIMES_OOP, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); // dst_addr __ movl2ptr(count, r11_length); // length __ BIND(L_plain_copy); __ jump(RuntimeAddress(oop_copy_entry)); __ BIND(L_checkcast_copy); // live at this point: r10_src_klass, r11_length, rax (dst_klass) { // Before looking at dst.length, make sure dst is also an objArray. __ cmpl(Address(rax, lh_offset), objArray_lh); __ jcc(Assembler::notEqual, L_failed); // It is safe to examine both src.length and dst.length. arraycopy_range_checks(src, src_pos, dst, dst_pos, r11_length, rax, L_failed); const Register r11_dst_klass = r11; __ load_klass(r11_dst_klass, dst); // reload // Marshal the base address arguments now, freeing registers. __ lea(from, Address(src, src_pos, TIMES_OOP, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); __ lea(to, Address(dst, dst_pos, TIMES_OOP, arrayOopDesc::base_offset_in_bytes(T_OBJECT))); __ movl(count, length); // length (reloaded) Register sco_temp = c_rarg3; // this register is free now assert_different_registers(from, to, count, sco_temp, r11_dst_klass, r10_src_klass); assert_clean_int(count, sco_temp); // Generate the type check. const int sco_offset = (klassOopDesc::header_size() * HeapWordSize + Klass::super_check_offset_offset_in_bytes()); __ movl(sco_temp, Address(r11_dst_klass, sco_offset)); assert_clean_int(sco_temp, rax); generate_type_check(r10_src_klass, sco_temp, r11_dst_klass, L_plain_copy); // Fetch destination element klass from the objArrayKlass header. int ek_offset = (klassOopDesc::header_size() * HeapWordSize + objArrayKlass::element_klass_offset_in_bytes()); __ movptr(r11_dst_klass, Address(r11_dst_klass, ek_offset)); __ movl( sco_temp, Address(r11_dst_klass, sco_offset)); assert_clean_int(sco_temp, rax); // the checkcast_copy loop needs two extra arguments: assert(c_rarg3 == sco_temp, "#3 already in place"); // Set up arguments for checkcast_copy_entry. setup_arg_regs(4); __ movptr(r8, r11_dst_klass); // dst.klass.element_klass, r8 is c_rarg4 on Linux/Solaris __ jump(RuntimeAddress(checkcast_copy_entry)); } __ BIND(L_failed); __ xorptr(rax, rax); __ notptr(rax); // return -1 __ leave(); // required for proper stackwalking of RuntimeStub frame __ ret(0); return start; } void generate_arraycopy_stubs() { address entry; address entry_jbyte_arraycopy; address entry_jshort_arraycopy; address entry_jint_arraycopy; address entry_oop_arraycopy; address entry_jlong_arraycopy; address entry_checkcast_arraycopy; StubRoutines::_jbyte_disjoint_arraycopy = generate_disjoint_byte_copy(false, &entry, "jbyte_disjoint_arraycopy"); StubRoutines::_jbyte_arraycopy = generate_conjoint_byte_copy(false, entry, &entry_jbyte_arraycopy, "jbyte_arraycopy"); StubRoutines::_jshort_disjoint_arraycopy = generate_disjoint_short_copy(false, &entry, "jshort_disjoint_arraycopy"); StubRoutines::_jshort_arraycopy = generate_conjoint_short_copy(false, entry, &entry_jshort_arraycopy, "jshort_arraycopy"); StubRoutines::_jint_disjoint_arraycopy = generate_disjoint_int_oop_copy(false, false, &entry, "jint_disjoint_arraycopy"); StubRoutines::_jint_arraycopy = generate_conjoint_int_oop_copy(false, false, entry, &entry_jint_arraycopy, "jint_arraycopy"); StubRoutines::_jlong_disjoint_arraycopy = generate_disjoint_long_oop_copy(false, false, &entry, "jlong_disjoint_arraycopy"); StubRoutines::_jlong_arraycopy = generate_conjoint_long_oop_copy(false, false, entry, &entry_jlong_arraycopy, "jlong_arraycopy"); if (UseCompressedOops) { StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_int_oop_copy(false, true, &entry, "oop_disjoint_arraycopy"); StubRoutines::_oop_arraycopy = generate_conjoint_int_oop_copy(false, true, entry, &entry_oop_arraycopy, "oop_arraycopy"); StubRoutines::_oop_disjoint_arraycopy_uninit = generate_disjoint_int_oop_copy(false, true, &entry, "oop_disjoint_arraycopy_uninit", /*dest_uninitialized*/true); StubRoutines::_oop_arraycopy_uninit = generate_conjoint_int_oop_copy(false, true, entry, NULL, "oop_arraycopy_uninit", /*dest_uninitialized*/true); } else { StubRoutines::_oop_disjoint_arraycopy = generate_disjoint_long_oop_copy(false, true, &entry, "oop_disjoint_arraycopy"); StubRoutines::_oop_arraycopy = generate_conjoint_long_oop_copy(false, true, entry, &entry_oop_arraycopy, "oop_arraycopy"); StubRoutines::_oop_disjoint_arraycopy_uninit = generate_disjoint_long_oop_copy(false, true, &entry, "oop_disjoint_arraycopy_uninit", /*dest_uninitialized*/true); StubRoutines::_oop_arraycopy_uninit = generate_conjoint_long_oop_copy(false, true, entry, NULL, "oop_arraycopy_uninit", /*dest_uninitialized*/true); } StubRoutines::_checkcast_arraycopy = generate_checkcast_copy("checkcast_arraycopy", &entry_checkcast_arraycopy); StubRoutines::_checkcast_arraycopy_uninit = generate_checkcast_copy("checkcast_arraycopy_uninit", NULL, /*dest_uninitialized*/true); StubRoutines::_unsafe_arraycopy = generate_unsafe_copy("unsafe_arraycopy", entry_jbyte_arraycopy, entry_jshort_arraycopy, entry_jint_arraycopy, entry_jlong_arraycopy); StubRoutines::_generic_arraycopy = generate_generic_copy("generic_arraycopy", entry_jbyte_arraycopy, entry_jshort_arraycopy, entry_jint_arraycopy, entry_oop_arraycopy, entry_jlong_arraycopy, entry_checkcast_arraycopy); StubRoutines::_jbyte_fill = generate_fill(T_BYTE, false, "jbyte_fill"); StubRoutines::_jshort_fill = generate_fill(T_SHORT, false, "jshort_fill"); StubRoutines::_jint_fill = generate_fill(T_INT, false, "jint_fill"); StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill"); StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill"); StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill"); // We don't generate specialized code for HeapWord-aligned source // arrays, so just use the code we've already generated StubRoutines::_arrayof_jbyte_disjoint_arraycopy = StubRoutines::_jbyte_disjoint_arraycopy; StubRoutines::_arrayof_jbyte_arraycopy = StubRoutines::_jbyte_arraycopy; StubRoutines::_arrayof_jshort_disjoint_arraycopy = StubRoutines::_jshort_disjoint_arraycopy; StubRoutines::_arrayof_jshort_arraycopy = StubRoutines::_jshort_arraycopy; StubRoutines::_arrayof_jint_disjoint_arraycopy = StubRoutines::_jint_disjoint_arraycopy; StubRoutines::_arrayof_jint_arraycopy = StubRoutines::_jint_arraycopy; StubRoutines::_arrayof_jlong_disjoint_arraycopy = StubRoutines::_jlong_disjoint_arraycopy; StubRoutines::_arrayof_jlong_arraycopy = StubRoutines::_jlong_arraycopy; StubRoutines::_arrayof_oop_disjoint_arraycopy = StubRoutines::_oop_disjoint_arraycopy; StubRoutines::_arrayof_oop_arraycopy = StubRoutines::_oop_arraycopy; StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit = StubRoutines::_oop_disjoint_arraycopy_uninit; StubRoutines::_arrayof_oop_arraycopy_uninit = StubRoutines::_oop_arraycopy_uninit; } void generate_math_stubs() { { StubCodeMark mark(this, "StubRoutines", "log"); StubRoutines::_intrinsic_log = (double (*)(double)) __ pc(); __ subq(rsp, 8); __ movdbl(Address(rsp, 0), xmm0); __ fld_d(Address(rsp, 0)); __ flog(); __ fstp_d(Address(rsp, 0)); __ movdbl(xmm0, Address(rsp, 0)); __ addq(rsp, 8); __ ret(0); } { StubCodeMark mark(this, "StubRoutines", "log10"); StubRoutines::_intrinsic_log10 = (double (*)(double)) __ pc(); __ subq(rsp, 8); __ movdbl(Address(rsp, 0), xmm0); __ fld_d(Address(rsp, 0)); __ flog10(); __ fstp_d(Address(rsp, 0)); __ movdbl(xmm0, Address(rsp, 0)); __ addq(rsp, 8); __ ret(0); } { StubCodeMark mark(this, "StubRoutines", "sin"); StubRoutines::_intrinsic_sin = (double (*)(double)) __ pc(); __ subq(rsp, 8); __ movdbl(Address(rsp, 0), xmm0); __ fld_d(Address(rsp, 0)); __ trigfunc('s'); __ fstp_d(Address(rsp, 0)); __ movdbl(xmm0, Address(rsp, 0)); __ addq(rsp, 8); __ ret(0); } { StubCodeMark mark(this, "StubRoutines", "cos"); StubRoutines::_intrinsic_cos = (double (*)(double)) __ pc(); __ subq(rsp, 8); __ movdbl(Address(rsp, 0), xmm0); __ fld_d(Address(rsp, 0)); __ trigfunc('c'); __ fstp_d(Address(rsp, 0)); __ movdbl(xmm0, Address(rsp, 0)); __ addq(rsp, 8); __ ret(0); } { StubCodeMark mark(this, "StubRoutines", "tan"); StubRoutines::_intrinsic_tan = (double (*)(double)) __ pc(); __ subq(rsp, 8); __ movdbl(Address(rsp, 0), xmm0); __ fld_d(Address(rsp, 0)); __ trigfunc('t'); __ fstp_d(Address(rsp, 0)); __ movdbl(xmm0, Address(rsp, 0)); __ addq(rsp, 8); __ ret(0); } // The intrinsic version of these seem to return the same value as // the strict version. StubRoutines::_intrinsic_exp = SharedRuntime::dexp; StubRoutines::_intrinsic_pow = SharedRuntime::dpow; } #undef __ #define __ masm-> // Continuation point for throwing of implicit exceptions that are // not handled in the current activation. Fabricates an exception // oop and initiates normal exception dispatching in this // frame. Since we need to preserve callee-saved values (currently // only for C2, but done for C1 as well) we need a callee-saved oop // map and therefore have to make these stubs into RuntimeStubs // rather than BufferBlobs. If the compiler needs all registers to // be preserved between the fault point and the exception handler // then it must assume responsibility for that in // AbstractCompiler::continuation_for_implicit_null_exception or // continuation_for_implicit_division_by_zero_exception. All other // implicit exceptions (e.g., NullPointerException or // AbstractMethodError on entry) are either at call sites or // otherwise assume that stack unwinding will be initiated, so // caller saved registers were assumed volatile in the compiler. address generate_throw_exception(const char* name, address runtime_entry, Register arg1 = noreg, Register arg2 = noreg) { // Information about frame layout at time of blocking runtime call. // Note that we only have to preserve callee-saved registers since // the compilers are responsible for supplying a continuation point // if they expect all registers to be preserved. enum layout { rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt, rbp_off2, return_off, return_off2, framesize // inclusive of return address }; int insts_size = 512; int locs_size = 64; CodeBuffer code(name, insts_size, locs_size); OopMapSet* oop_maps = new OopMapSet(); MacroAssembler* masm = new MacroAssembler(&code); address start = __ pc(); // This is an inlined and slightly modified version of call_VM // which has the ability to fetch the return PC out of // thread-local storage and also sets up last_Java_sp slightly // differently than the real call_VM __ enter(); // required for proper stackwalking of RuntimeStub frame assert(is_even(framesize/2), "sp not 16-byte aligned"); // return address and rbp are already in place __ subptr(rsp, (framesize-4) << LogBytesPerInt); // prolog int frame_complete = __ pc() - start; // Set up last_Java_sp and last_Java_fp __ set_last_Java_frame(rsp, rbp, NULL); // Call runtime if (arg1 != noreg) { assert(arg2 != c_rarg1, "clobbered"); __ movptr(c_rarg1, arg1); } if (arg2 != noreg) { __ movptr(c_rarg2, arg2); } __ movptr(c_rarg0, r15_thread); BLOCK_COMMENT("call runtime_entry"); __ call(RuntimeAddress(runtime_entry)); // Generate oop map OopMap* map = new OopMap(framesize, 0); oop_maps->add_gc_map(__ pc() - start, map); __ reset_last_Java_frame(true, false); __ leave(); // required for proper stackwalking of RuntimeStub frame // check for pending exceptions #ifdef ASSERT Label L; __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); __ jcc(Assembler::notEqual, L); __ should_not_reach_here(); __ bind(L); #endif // ASSERT __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); // codeBlob framesize is in words (not VMRegImpl::slot_size) RuntimeStub* stub = RuntimeStub::new_runtime_stub(name, &code, frame_complete, (framesize >> (LogBytesPerWord - LogBytesPerInt)), oop_maps, false); return stub->entry_point(); } // Initialization void generate_initial() { // Generates all stubs and initializes the entry points // This platform-specific stub is needed by generate_call_stub() StubRoutines::x86::_mxcsr_std = generate_fp_mask("mxcsr_std", 0x0000000000001F80); // entry points that exist in all platforms Note: This is code // that could be shared among different platforms - however the // benefit seems to be smaller than the disadvantage of having a // much more complicated generator structure. See also comment in // stubRoutines.hpp. StubRoutines::_forward_exception_entry = generate_forward_exception(); StubRoutines::_call_stub_entry = generate_call_stub(StubRoutines::_call_stub_return_address); // is referenced by megamorphic call StubRoutines::_catch_exception_entry = generate_catch_exception(); // atomic calls StubRoutines::_atomic_xchg_entry = generate_atomic_xchg(); StubRoutines::_atomic_xchg_ptr_entry = generate_atomic_xchg_ptr(); StubRoutines::_atomic_cmpxchg_entry = generate_atomic_cmpxchg(); StubRoutines::_atomic_cmpxchg_long_entry = generate_atomic_cmpxchg_long(); StubRoutines::_atomic_add_entry = generate_atomic_add(); StubRoutines::_atomic_add_ptr_entry = generate_atomic_add_ptr(); StubRoutines::_fence_entry = generate_orderaccess_fence(); StubRoutines::_handler_for_unsafe_access_entry = generate_handler_for_unsafe_access(); // platform dependent StubRoutines::x86::_get_previous_fp_entry = generate_get_previous_fp(); StubRoutines::x86::_verify_mxcsr_entry = generate_verify_mxcsr(); // Build this early so it's available for the interpreter. Stub // expects the required and actual types as register arguments in // j_rarg0 and j_rarg1 respectively. StubRoutines::_throw_WrongMethodTypeException_entry = generate_throw_exception("WrongMethodTypeException throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime::throw_WrongMethodTypeException), rax, rcx); } void generate_all() { // Generates all stubs and initializes the entry points // These entry points require SharedInfo::stack0 to be set up in // non-core builds and need to be relocatable, so they each // fabricate a RuntimeStub internally. StubRoutines::_throw_AbstractMethodError_entry = generate_throw_exception("AbstractMethodError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime:: throw_AbstractMethodError)); StubRoutines::_throw_IncompatibleClassChangeError_entry = generate_throw_exception("IncompatibleClassChangeError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime:: throw_IncompatibleClassChangeError)); StubRoutines::_throw_NullPointerException_at_call_entry = generate_throw_exception("NullPointerException at call throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime:: throw_NullPointerException_at_call)); StubRoutines::_throw_StackOverflowError_entry = generate_throw_exception("StackOverflowError throw_exception", CAST_FROM_FN_PTR(address, SharedRuntime:: throw_StackOverflowError)); // entry points that are platform specific StubRoutines::x86::_f2i_fixup = generate_f2i_fixup(); StubRoutines::x86::_f2l_fixup = generate_f2l_fixup(); StubRoutines::x86::_d2i_fixup = generate_d2i_fixup(); StubRoutines::x86::_d2l_fixup = generate_d2l_fixup(); StubRoutines::x86::_float_sign_mask = generate_fp_mask("float_sign_mask", 0x7FFFFFFF7FFFFFFF); StubRoutines::x86::_float_sign_flip = generate_fp_mask("float_sign_flip", 0x8000000080000000); StubRoutines::x86::_double_sign_mask = generate_fp_mask("double_sign_mask", 0x7FFFFFFFFFFFFFFF); StubRoutines::x86::_double_sign_flip = generate_fp_mask("double_sign_flip", 0x8000000000000000); // support for verify_oop (must happen after universe_init) StubRoutines::_verify_oop_subroutine_entry = generate_verify_oop(); // arraycopy stubs used by compilers generate_arraycopy_stubs(); generate_math_stubs(); } public: StubGenerator(CodeBuffer* code, bool all) : StubCodeGenerator(code) { if (all) { generate_all(); } else { generate_initial(); } } }; // end class declaration void StubGenerator_generate(CodeBuffer* code, bool all) { StubGenerator g(code, all); }