diff -r b7ea5d095ef5 -r 07b1cc0f6040 hotspot/src/cpu/x86/vm/templateInterpreterGenerator_x86.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/hotspot/src/cpu/x86/vm/templateInterpreterGenerator_x86.cpp Sat Dec 05 10:40:22 2015 -0500 @@ -0,0 +1,1874 @@ +/* + * Copyright (c) 2003, 2015, 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/macroAssembler.hpp" +#include "interpreter/bytecodeHistogram.hpp" +#include "interpreter/interpreter.hpp" +#include "interpreter/interpreterGenerator.hpp" +#include "interpreter/interpreterRuntime.hpp" +#include "interpreter/interp_masm.hpp" +#include "interpreter/templateTable.hpp" +#include "oops/arrayOop.hpp" +#include "oops/methodData.hpp" +#include "oops/method.hpp" +#include "oops/oop.inline.hpp" +#include "prims/jvmtiExport.hpp" +#include "prims/jvmtiThreadState.hpp" +#include "runtime/arguments.hpp" +#include "runtime/deoptimization.hpp" +#include "runtime/frame.inline.hpp" +#include "runtime/sharedRuntime.hpp" +#include "runtime/stubRoutines.hpp" +#include "runtime/synchronizer.hpp" +#include "runtime/timer.hpp" +#include "runtime/vframeArray.hpp" +#include "utilities/debug.hpp" +#include "utilities/macros.hpp" + +#define __ _masm-> + +#ifndef CC_INTERP + +// Global Register Names +static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi); +static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi); + +const int method_offset = frame::interpreter_frame_method_offset * wordSize; +const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize; +const int locals_offset = frame::interpreter_frame_locals_offset * wordSize; + +//----------------------------------------------------------------------------- + +address TemplateInterpreterGenerator::generate_StackOverflowError_handler() { + address entry = __ pc(); + +#ifdef ASSERT + { + Label L; + __ lea(rax, Address(rbp, + frame::interpreter_frame_monitor_block_top_offset * + wordSize)); + __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack + // grows negative) + __ jcc(Assembler::aboveEqual, L); // check if frame is complete + __ stop ("interpreter frame not set up"); + __ bind(L); + } +#endif // ASSERT + // Restore bcp under the assumption that the current frame is still + // interpreted + __ restore_bcp(); + + // expression stack must be empty before entering the VM if an + // exception happened + __ empty_expression_stack(); + // throw exception + __ call_VM(noreg, + CAST_FROM_FN_PTR(address, + InterpreterRuntime::throw_StackOverflowError)); + return entry; +} + +address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler( + const char* name) { + address entry = __ pc(); + // expression stack must be empty before entering the VM if an + // exception happened + __ empty_expression_stack(); + // setup parameters + // ??? convention: expect aberrant index in register ebx + Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); + __ lea(rarg, ExternalAddress((address)name)); + __ call_VM(noreg, + CAST_FROM_FN_PTR(address, + InterpreterRuntime:: + throw_ArrayIndexOutOfBoundsException), + rarg, rbx); + return entry; +} + +address TemplateInterpreterGenerator::generate_ClassCastException_handler() { + address entry = __ pc(); + + // object is at TOS + Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); + __ pop(rarg); + + // expression stack must be empty before entering the VM if an + // exception happened + __ empty_expression_stack(); + + __ call_VM(noreg, + CAST_FROM_FN_PTR(address, + InterpreterRuntime:: + throw_ClassCastException), + rarg); + return entry; +} + +address TemplateInterpreterGenerator::generate_exception_handler_common( + const char* name, const char* message, bool pass_oop) { + assert(!pass_oop || message == NULL, "either oop or message but not both"); + address entry = __ pc(); + + Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); + Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2); + + if (pass_oop) { + // object is at TOS + __ pop(rarg2); + } + // expression stack must be empty before entering the VM if an + // exception happened + __ empty_expression_stack(); + // setup parameters + __ lea(rarg, ExternalAddress((address)name)); + if (pass_oop) { + __ call_VM(rax, CAST_FROM_FN_PTR(address, + InterpreterRuntime:: + create_klass_exception), + rarg, rarg2); + } else { + // kind of lame ExternalAddress can't take NULL because + // external_word_Relocation will assert. + if (message != NULL) { + __ lea(rarg2, ExternalAddress((address)message)); + } else { + __ movptr(rarg2, NULL_WORD); + } + __ call_VM(rax, + CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), + rarg, rarg2); + } + // throw exception + __ jump(ExternalAddress(Interpreter::throw_exception_entry())); + return entry; +} + + +address TemplateInterpreterGenerator::generate_continuation_for(TosState state) { + address entry = __ pc(); + // NULL last_sp until next java call + __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); + __ dispatch_next(state); + return entry; +} + + +address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) { + address entry = __ pc(); + +#ifndef _LP64 +#ifdef COMPILER2 + // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases + if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) { + for (int i = 1; i < 8; i++) { + __ ffree(i); + } + } else if (UseSSE < 2) { + __ empty_FPU_stack(); + } +#endif // COMPILER2 + if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) { + __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled"); + } else { + __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled"); + } + + if (state == ftos) { + __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter"); + } else if (state == dtos) { + __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter"); + } +#endif // _LP64 + + // Restore stack bottom in case i2c adjusted stack + __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); + // and NULL it as marker that esp is now tos until next java call + __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); + + __ restore_bcp(); + __ restore_locals(); + + if (state == atos) { + Register mdp = rbx; + Register tmp = rcx; + __ profile_return_type(mdp, rax, tmp); + } + + const Register cache = rbx; + const Register index = rcx; + __ get_cache_and_index_at_bcp(cache, index, 1, index_size); + + const Register flags = cache; + __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset())); + __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask); + __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale())); + __ dispatch_next(state, step); + + return entry; +} + + +address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) { + address entry = __ pc(); + +#ifndef _LP64 + if (state == ftos) { + __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter"); + } else if (state == dtos) { + __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter"); + } +#endif // _LP64 + + // NULL last_sp until next java call + __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); + __ restore_bcp(); + __ restore_locals(); + const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); + NOT_LP64(__ get_thread(thread)); +#if INCLUDE_JVMCI + // Check if we need to take lock at entry of synchronized method. + if (UseJVMCICompiler) { + Label L; + __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0); + __ jcc(Assembler::zero, L); + // Clear flag. + __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0); + // Satisfy calling convention for lock_method(). + __ get_method(rbx); + // Take lock. + lock_method(); + __ bind(L); + } +#endif + // handle exceptions + { + Label L; + __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); + __ jcc(Assembler::zero, L); + __ call_VM(noreg, + CAST_FROM_FN_PTR(address, + InterpreterRuntime::throw_pending_exception)); + __ should_not_reach_here(); + __ bind(L); + } + __ dispatch_next(state, step); + return entry; +} + +address TemplateInterpreterGenerator::generate_result_handler_for( + BasicType type) { + address entry = __ pc(); + switch (type) { + case T_BOOLEAN: __ c2bool(rax); break; +#ifndef _LP64 + case T_CHAR : __ andptr(rax, 0xFFFF); break; +#else + case T_CHAR : __ movzwl(rax, rax); break; +#endif // _LP64 + case T_BYTE : __ sign_extend_byte(rax); break; + case T_SHORT : __ sign_extend_short(rax); break; + case T_INT : /* nothing to do */ break; + case T_LONG : /* nothing to do */ break; + case T_VOID : /* nothing to do */ break; +#ifndef _LP64 + case T_DOUBLE : + case T_FLOAT : + { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp(); + __ pop(t); // remove return address first + // Must return a result for interpreter or compiler. In SSE + // mode, results are returned in xmm0 and the FPU stack must + // be empty. + if (type == T_FLOAT && UseSSE >= 1) { + // Load ST0 + __ fld_d(Address(rsp, 0)); + // Store as float and empty fpu stack + __ fstp_s(Address(rsp, 0)); + // and reload + __ movflt(xmm0, Address(rsp, 0)); + } else if (type == T_DOUBLE && UseSSE >= 2 ) { + __ movdbl(xmm0, Address(rsp, 0)); + } else { + // restore ST0 + __ fld_d(Address(rsp, 0)); + } + // and pop the temp + __ addptr(rsp, 2 * wordSize); + __ push(t); // restore return address + } + break; +#else + case T_FLOAT : /* nothing to do */ break; + case T_DOUBLE : /* nothing to do */ break; +#endif // _LP64 + + case T_OBJECT : + // retrieve result from frame + __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize)); + // and verify it + __ verify_oop(rax); + break; + default : ShouldNotReachHere(); + } + __ ret(0); // return from result handler + return entry; +} + +address TemplateInterpreterGenerator::generate_safept_entry_for( + TosState state, + address runtime_entry) { + address entry = __ pc(); + __ push(state); + __ call_VM(noreg, runtime_entry); + __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos)); + return entry; +} + + + +// Helpers for commoning out cases in the various type of method entries. +// + + +// increment invocation count & check for overflow +// +// Note: checking for negative value instead of overflow +// so we have a 'sticky' overflow test +// +// rbx: method +// rcx: invocation counter +// +void InterpreterGenerator::generate_counter_incr( + Label* overflow, + Label* profile_method, + Label* profile_method_continue) { + Label done; + // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not. + if (TieredCompilation) { + int increment = InvocationCounter::count_increment; + Label no_mdo; + if (ProfileInterpreter) { + // Are we profiling? + __ movptr(rax, Address(rbx, Method::method_data_offset())); + __ testptr(rax, rax); + __ jccb(Assembler::zero, no_mdo); + // Increment counter in the MDO + const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) + + in_bytes(InvocationCounter::counter_offset())); + const Address mask(rax, in_bytes(MethodData::invoke_mask_offset())); + __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow); + __ jmp(done); + } + __ bind(no_mdo); + // Increment counter in MethodCounters + const Address invocation_counter(rax, + MethodCounters::invocation_counter_offset() + + InvocationCounter::counter_offset()); + __ get_method_counters(rbx, rax, done); + const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset())); + __ increment_mask_and_jump(invocation_counter, increment, mask, rcx, + false, Assembler::zero, overflow); + __ bind(done); + } else { // not TieredCompilation + const Address backedge_counter(rax, + MethodCounters::backedge_counter_offset() + + InvocationCounter::counter_offset()); + const Address invocation_counter(rax, + MethodCounters::invocation_counter_offset() + + InvocationCounter::counter_offset()); + + __ get_method_counters(rbx, rax, done); + + if (ProfileInterpreter) { + __ incrementl(Address(rax, + MethodCounters::interpreter_invocation_counter_offset())); + } + // Update standard invocation counters + __ movl(rcx, invocation_counter); + __ incrementl(rcx, InvocationCounter::count_increment); + __ movl(invocation_counter, rcx); // save invocation count + + __ movl(rax, backedge_counter); // load backedge counter + __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits + + __ addl(rcx, rax); // add both counters + + // profile_method is non-null only for interpreted method so + // profile_method != NULL == !native_call + + if (ProfileInterpreter && profile_method != NULL) { + // Test to see if we should create a method data oop + __ movptr(rax, Address(rbx, Method::method_counters_offset())); + __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset()))); + __ jcc(Assembler::less, *profile_method_continue); + + // if no method data exists, go to profile_method + __ test_method_data_pointer(rax, *profile_method); + } + + __ movptr(rax, Address(rbx, Method::method_counters_offset())); + __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset()))); + __ jcc(Assembler::aboveEqual, *overflow); + __ bind(done); + } +} + +void InterpreterGenerator::generate_counter_overflow(Label* do_continue) { + + // Asm interpreter on entry + // r14/rdi - locals + // r13/rsi - bcp + // rbx - method + // rdx - cpool --- DOES NOT APPEAR TO BE TRUE + // rbp - interpreter frame + + // On return (i.e. jump to entry_point) [ back to invocation of interpreter ] + // Everything as it was on entry + // rdx is not restored. Doesn't appear to really be set. + + // InterpreterRuntime::frequency_counter_overflow takes two + // arguments, the first (thread) is passed by call_VM, the second + // indicates if the counter overflow occurs at a backwards branch + // (NULL bcp). We pass zero for it. The call returns the address + // of the verified entry point for the method or NULL if the + // compilation did not complete (either went background or bailed + // out). + Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); + __ movl(rarg, 0); + __ call_VM(noreg, + CAST_FROM_FN_PTR(address, + InterpreterRuntime::frequency_counter_overflow), + rarg); + + __ movptr(rbx, Address(rbp, method_offset)); // restore Method* + // Preserve invariant that r13/r14 contain bcp/locals of sender frame + // and jump to the interpreted entry. + __ jmp(*do_continue, relocInfo::none); +} + +// See if we've got enough room on the stack for locals plus overhead. +// The expression stack grows down incrementally, so the normal guard +// page mechanism will work for that. +// +// NOTE: Since the additional locals are also always pushed (wasn't +// obvious in generate_fixed_frame) so the guard should work for them +// too. +// +// Args: +// rdx: number of additional locals this frame needs (what we must check) +// rbx: Method* +// +// Kills: +// rax +void InterpreterGenerator::generate_stack_overflow_check(void) { + + // monitor entry size: see picture of stack in frame_x86.hpp + const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; + + // total overhead size: entry_size + (saved rbp through expr stack + // bottom). be sure to change this if you add/subtract anything + // to/from the overhead area + const int overhead_size = + -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size; + + const int page_size = os::vm_page_size(); + + Label after_frame_check; + + // see if the frame is greater than one page in size. If so, + // then we need to verify there is enough stack space remaining + // for the additional locals. + __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize); + __ jcc(Assembler::belowEqual, after_frame_check); + + // compute rsp as if this were going to be the last frame on + // the stack before the red zone + + Label after_frame_check_pop; + const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread); +#ifndef _LP64 + __ push(thread); + __ get_thread(thread); +#endif + + const Address stack_base(thread, Thread::stack_base_offset()); + const Address stack_size(thread, Thread::stack_size_offset()); + + // locals + overhead, in bytes + __ mov(rax, rdx); + __ shlptr(rax, Interpreter::logStackElementSize); // 2 slots per parameter. + __ addptr(rax, overhead_size); + +#ifdef ASSERT + Label stack_base_okay, stack_size_okay; + // verify that thread stack base is non-zero + __ cmpptr(stack_base, (int32_t)NULL_WORD); + __ jcc(Assembler::notEqual, stack_base_okay); + __ stop("stack base is zero"); + __ bind(stack_base_okay); + // verify that thread stack size is non-zero + __ cmpptr(stack_size, 0); + __ jcc(Assembler::notEqual, stack_size_okay); + __ stop("stack size is zero"); + __ bind(stack_size_okay); +#endif + + // Add stack base to locals and subtract stack size + __ addptr(rax, stack_base); + __ subptr(rax, stack_size); + + // Use the maximum number of pages we might bang. + const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages : + (StackRedPages+StackYellowPages); + + // add in the red and yellow zone sizes + __ addptr(rax, max_pages * page_size); + + // check against the current stack bottom + __ cmpptr(rsp, rax); + + __ jcc(Assembler::above, after_frame_check_pop); + NOT_LP64(__ pop(rsi)); // get saved bcp + + // Restore sender's sp as SP. This is necessary if the sender's + // frame is an extended compiled frame (see gen_c2i_adapter()) + // and safer anyway in case of JSR292 adaptations. + + __ pop(rax); // return address must be moved if SP is changed + __ mov(rsp, rbcp); + __ push(rax); + + // Note: the restored frame is not necessarily interpreted. + // Use the shared runtime version of the StackOverflowError. + assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated"); + __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry())); + // all done with frame size check + __ bind(after_frame_check_pop); + NOT_LP64(__ pop(rsi)); + + // all done with frame size check + __ bind(after_frame_check); +} + +// Allocate monitor and lock method (asm interpreter) +// +// Args: +// rbx: Method* +// r14/rdi: locals +// +// Kills: +// rax +// c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs) +// rscratch1, rscratch2 (scratch regs) +void TemplateInterpreterGenerator::lock_method() { + // synchronize method + const Address access_flags(rbx, Method::access_flags_offset()); + const Address monitor_block_top( + rbp, + frame::interpreter_frame_monitor_block_top_offset * wordSize); + const int entry_size = frame::interpreter_frame_monitor_size() * wordSize; + +#ifdef ASSERT + { + Label L; + __ movl(rax, access_flags); + __ testl(rax, JVM_ACC_SYNCHRONIZED); + __ jcc(Assembler::notZero, L); + __ stop("method doesn't need synchronization"); + __ bind(L); + } +#endif // ASSERT + + // get synchronization object + { + const int mirror_offset = in_bytes(Klass::java_mirror_offset()); + Label done; + __ movl(rax, access_flags); + __ testl(rax, JVM_ACC_STATIC); + // get receiver (assume this is frequent case) + __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0))); + __ jcc(Assembler::zero, done); + __ movptr(rax, Address(rbx, Method::const_offset())); + __ movptr(rax, Address(rax, ConstMethod::constants_offset())); + __ movptr(rax, Address(rax, + ConstantPool::pool_holder_offset_in_bytes())); + __ movptr(rax, Address(rax, mirror_offset)); + +#ifdef ASSERT + { + Label L; + __ testptr(rax, rax); + __ jcc(Assembler::notZero, L); + __ stop("synchronization object is NULL"); + __ bind(L); + } +#endif // ASSERT + + __ bind(done); + } + + // add space for monitor & lock + __ subptr(rsp, entry_size); // add space for a monitor entry + __ movptr(monitor_block_top, rsp); // set new monitor block top + // store object + __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); + const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1); + __ movptr(lockreg, rsp); // object address + __ lock_object(lockreg); +} + +// Generate a fixed interpreter frame. This is identical setup for +// interpreted methods and for native methods hence the shared code. +// +// Args: +// rax: return address +// rbx: Method* +// r14/rdi: pointer to locals +// r13/rsi: sender sp +// rdx: cp cache +void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) { + // initialize fixed part of activation frame + __ push(rax); // save return address + __ enter(); // save old & set new rbp + __ push(rbcp); // set sender sp + __ push((int)NULL_WORD); // leave last_sp as null + __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod* + __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase + __ push(rbx); // save Method* + if (ProfileInterpreter) { + Label method_data_continue; + __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset()))); + __ testptr(rdx, rdx); + __ jcc(Assembler::zero, method_data_continue); + __ addptr(rdx, in_bytes(MethodData::data_offset())); + __ bind(method_data_continue); + __ push(rdx); // set the mdp (method data pointer) + } else { + __ push(0); + } + + __ movptr(rdx, Address(rbx, Method::const_offset())); + __ movptr(rdx, Address(rdx, ConstMethod::constants_offset())); + __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes())); + __ push(rdx); // set constant pool cache + __ push(rlocals); // set locals pointer + if (native_call) { + __ push(0); // no bcp + } else { + __ push(rbcp); // set bcp + } + __ push(0); // reserve word for pointer to expression stack bottom + __ movptr(Address(rsp, 0), rsp); // set expression stack bottom +} + +// End of helpers + +// Method entry for java.lang.ref.Reference.get. +address InterpreterGenerator::generate_Reference_get_entry(void) { +#if INCLUDE_ALL_GCS + // Code: _aload_0, _getfield, _areturn + // parameter size = 1 + // + // The code that gets generated by this routine is split into 2 parts: + // 1. The "intrinsified" code for G1 (or any SATB based GC), + // 2. The slow path - which is an expansion of the regular method entry. + // + // Notes:- + // * In the G1 code we do not check whether we need to block for + // a safepoint. If G1 is enabled then we must execute the specialized + // code for Reference.get (except when the Reference object is null) + // so that we can log the value in the referent field with an SATB + // update buffer. + // If the code for the getfield template is modified so that the + // G1 pre-barrier code is executed when the current method is + // Reference.get() then going through the normal method entry + // will be fine. + // * The G1 code can, however, check the receiver object (the instance + // of java.lang.Reference) and jump to the slow path if null. If the + // Reference object is null then we obviously cannot fetch the referent + // and so we don't need to call the G1 pre-barrier. Thus we can use the + // regular method entry code to generate the NPE. + // + // rbx: Method* + + // r13: senderSP must preserve for slow path, set SP to it on fast path + + address entry = __ pc(); + + const int referent_offset = java_lang_ref_Reference::referent_offset; + guarantee(referent_offset > 0, "referent offset not initialized"); + + if (UseG1GC) { + Label slow_path; + // rbx: method + + // Check if local 0 != NULL + // If the receiver is null then it is OK to jump to the slow path. + __ movptr(rax, Address(rsp, wordSize)); + + __ testptr(rax, rax); + __ jcc(Assembler::zero, slow_path); + + // rax: local 0 + // rbx: method (but can be used as scratch now) + // rdx: scratch + // rdi: scratch + + // Preserve the sender sp in case the pre-barrier + // calls the runtime + NOT_LP64(__ push(rsi)); + + // Generate the G1 pre-barrier code to log the value of + // the referent field in an SATB buffer. + + // Load the value of the referent field. + const Address field_address(rax, referent_offset); + __ load_heap_oop(rax, field_address); + + const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13); + const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); + NOT_LP64(__ get_thread(thread)); + + // Generate the G1 pre-barrier code to log the value of + // the referent field in an SATB buffer. + __ g1_write_barrier_pre(noreg /* obj */, + rax /* pre_val */, + thread /* thread */, + rbx /* tmp */, + true /* tosca_live */, + true /* expand_call */); + + // _areturn + NOT_LP64(__ pop(rsi)); // get sender sp + __ pop(rdi); // get return address + __ mov(rsp, sender_sp); // set sp to sender sp + __ jmp(rdi); + __ ret(0); + + // generate a vanilla interpreter entry as the slow path + __ bind(slow_path); + __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals)); + return entry; + } +#endif // INCLUDE_ALL_GCS + + // If G1 is not enabled then attempt to go through the accessor entry point + // Reference.get is an accessor + return NULL; +} + +// Interpreter stub for calling a native method. (asm interpreter) +// This sets up a somewhat different looking stack for calling the +// native method than the typical interpreter frame setup. +address InterpreterGenerator::generate_native_entry(bool synchronized) { + // determine code generation flags + bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; + + // rbx: Method* + // rbcp: sender sp + + address entry_point = __ pc(); + + const Address constMethod (rbx, Method::const_offset()); + const Address access_flags (rbx, Method::access_flags_offset()); + const Address size_of_parameters(rcx, ConstMethod:: + size_of_parameters_offset()); + + + // get parameter size (always needed) + __ movptr(rcx, constMethod); + __ load_unsigned_short(rcx, size_of_parameters); + + // native calls don't need the stack size check since they have no + // expression stack and the arguments are already on the stack and + // we only add a handful of words to the stack + + // rbx: Method* + // rcx: size of parameters + // rbcp: sender sp + __ pop(rax); // get return address + + // for natives the size of locals is zero + + // compute beginning of parameters + __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); + + // add 2 zero-initialized slots for native calls + // initialize result_handler slot + __ push((int) NULL_WORD); + // slot for oop temp + // (static native method holder mirror/jni oop result) + __ push((int) NULL_WORD); + + // initialize fixed part of activation frame + generate_fixed_frame(true); + + // make sure method is native & not abstract +#ifdef ASSERT + __ movl(rax, access_flags); + { + Label L; + __ testl(rax, JVM_ACC_NATIVE); + __ jcc(Assembler::notZero, L); + __ stop("tried to execute non-native method as native"); + __ bind(L); + } + { + Label L; + __ testl(rax, JVM_ACC_ABSTRACT); + __ jcc(Assembler::zero, L); + __ stop("tried to execute abstract method in interpreter"); + __ bind(L); + } +#endif + + // Since at this point in the method invocation the exception handler + // would try to exit the monitor of synchronized methods which hasn't + // been entered yet, we set the thread local variable + // _do_not_unlock_if_synchronized to true. The remove_activation will + // check this flag. + + const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread); + NOT_LP64(__ get_thread(thread1)); + const Address do_not_unlock_if_synchronized(thread1, + in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); + __ movbool(do_not_unlock_if_synchronized, true); + + // increment invocation count & check for overflow + Label invocation_counter_overflow; + if (inc_counter) { + generate_counter_incr(&invocation_counter_overflow, NULL, NULL); + } + + Label continue_after_compile; + __ bind(continue_after_compile); + + bang_stack_shadow_pages(true); + + // reset the _do_not_unlock_if_synchronized flag + NOT_LP64(__ get_thread(thread1)); + __ movbool(do_not_unlock_if_synchronized, false); + + // check for synchronized methods + // Must happen AFTER invocation_counter check and stack overflow check, + // so method is not locked if overflows. + if (synchronized) { + lock_method(); + } else { + // no synchronization necessary +#ifdef ASSERT + { + Label L; + __ movl(rax, access_flags); + __ testl(rax, JVM_ACC_SYNCHRONIZED); + __ jcc(Assembler::zero, L); + __ stop("method needs synchronization"); + __ bind(L); + } +#endif + } + + // start execution +#ifdef ASSERT + { + Label L; + const Address monitor_block_top(rbp, + frame::interpreter_frame_monitor_block_top_offset * wordSize); + __ movptr(rax, monitor_block_top); + __ cmpptr(rax, rsp); + __ jcc(Assembler::equal, L); + __ stop("broken stack frame setup in interpreter"); + __ bind(L); + } +#endif + + // jvmti support + __ notify_method_entry(); + + // work registers + const Register method = rbx; + const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread); + const Register t = NOT_LP64(rcx) LP64_ONLY(r11); + + // allocate space for parameters + __ get_method(method); + __ movptr(t, Address(method, Method::const_offset())); + __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset())); + +#ifndef _LP64 + __ shlptr(t, Interpreter::logStackElementSize); + __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror + __ subptr(rsp, t); + __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics +#else + __ shll(t, Interpreter::logStackElementSize); + + __ subptr(rsp, t); + __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows + __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI) +#endif // _LP64 + + // get signature handler + { + Label L; + __ movptr(t, Address(method, Method::signature_handler_offset())); + __ testptr(t, t); + __ jcc(Assembler::notZero, L); + __ call_VM(noreg, + CAST_FROM_FN_PTR(address, + InterpreterRuntime::prepare_native_call), + method); + __ get_method(method); + __ movptr(t, Address(method, Method::signature_handler_offset())); + __ bind(L); + } + + // call signature handler + assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals, + "adjust this code"); + assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp, + "adjust this code"); + assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1), + "adjust this code"); + + // The generated handlers do not touch RBX (the method oop). + // However, large signatures cannot be cached and are generated + // each time here. The slow-path generator can do a GC on return, + // so we must reload it after the call. + __ call(t); + __ get_method(method); // slow path can do a GC, reload RBX + + + // result handler is in rax + // set result handler + __ movptr(Address(rbp, + (frame::interpreter_frame_result_handler_offset) * wordSize), + rax); + + // pass mirror handle if static call + { + Label L; + const int mirror_offset = in_bytes(Klass::java_mirror_offset()); + __ movl(t, Address(method, Method::access_flags_offset())); + __ testl(t, JVM_ACC_STATIC); + __ jcc(Assembler::zero, L); + // get mirror + __ movptr(t, Address(method, Method::const_offset())); + __ movptr(t, Address(t, ConstMethod::constants_offset())); + __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes())); + __ movptr(t, Address(t, mirror_offset)); + // copy mirror into activation frame + __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize), + t); + // pass handle to mirror +#ifndef _LP64 + __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); + __ movptr(Address(rsp, wordSize), t); +#else + __ lea(c_rarg1, + Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize)); +#endif // _LP64 + __ bind(L); + } + + // get native function entry point + { + Label L; + __ movptr(rax, Address(method, Method::native_function_offset())); + ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry()); + __ cmpptr(rax, unsatisfied.addr()); + __ jcc(Assembler::notEqual, L); + __ call_VM(noreg, + CAST_FROM_FN_PTR(address, + InterpreterRuntime::prepare_native_call), + method); + __ get_method(method); + __ movptr(rax, Address(method, Method::native_function_offset())); + __ bind(L); + } + + // pass JNIEnv +#ifndef _LP64 + __ get_thread(thread); + __ lea(t, Address(thread, JavaThread::jni_environment_offset())); + __ movptr(Address(rsp, 0), t); + + // set_last_Java_frame_before_call + // It is enough that the pc() + // points into the right code segment. It does not have to be the correct return pc. + __ set_last_Java_frame(thread, noreg, rbp, __ pc()); +#else + __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset())); + + // It is enough that the pc() points into the right code + // segment. It does not have to be the correct return pc. + __ set_last_Java_frame(rsp, rbp, (address) __ pc()); +#endif // _LP64 + + // change thread state +#ifdef ASSERT + { + Label L; + __ movl(t, Address(thread, JavaThread::thread_state_offset())); + __ cmpl(t, _thread_in_Java); + __ jcc(Assembler::equal, L); + __ stop("Wrong thread state in native stub"); + __ bind(L); + } +#endif + + // Change state to native + + __ movl(Address(thread, JavaThread::thread_state_offset()), + _thread_in_native); + + // Call the native method. + __ call(rax); + // 32: result potentially in rdx:rax or ST0 + // 64: result potentially in rax or xmm0 + + // Verify or restore cpu control state after JNI call + __ restore_cpu_control_state_after_jni(); + + // NOTE: The order of these pushes is known to frame::interpreter_frame_result + // in order to extract the result of a method call. If the order of these + // pushes change or anything else is added to the stack then the code in + // interpreter_frame_result must also change. + +#ifndef _LP64 + // save potential result in ST(0) & rdx:rax + // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 - + // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers) + // It is safe to do this push because state is _thread_in_native and return address will be found + // via _last_native_pc and not via _last_jave_sp + + // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result. + // If the order changes or anything else is added to the stack the code in + // interpreter_frame_result will have to be changed. + + { Label L; + Label push_double; + ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT)); + ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE)); + __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), + float_handler.addr()); + __ jcc(Assembler::equal, push_double); + __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize), + double_handler.addr()); + __ jcc(Assembler::notEqual, L); + __ bind(push_double); + __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0). + __ bind(L); + } +#else + __ push(dtos); +#endif // _LP64 + + __ push(ltos); + + // change thread state + NOT_LP64(__ get_thread(thread)); + __ movl(Address(thread, JavaThread::thread_state_offset()), + _thread_in_native_trans); + + if (os::is_MP()) { + if (UseMembar) { + // Force this write out before the read below + __ membar(Assembler::Membar_mask_bits( + Assembler::LoadLoad | Assembler::LoadStore | + Assembler::StoreLoad | Assembler::StoreStore)); + } else { + // Write serialization page so VM thread can do a pseudo remote membar. + // We use the current thread pointer to calculate a thread specific + // offset to write to within the page. This minimizes bus traffic + // due to cache line collision. + __ serialize_memory(thread, rcx); + } + } + +#ifndef _LP64 + if (AlwaysRestoreFPU) { + // Make sure the control word is correct. + __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std())); + } +#endif // _LP64 + + // check for safepoint operation in progress and/or pending suspend requests + { + Label Continue; + __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()), + SafepointSynchronize::_not_synchronized); + + Label L; + __ jcc(Assembler::notEqual, L); + __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0); + __ jcc(Assembler::equal, Continue); + __ bind(L); + + // Don't use call_VM as it will see a possible pending exception + // and forward it and never return here preventing us from + // clearing _last_native_pc down below. Also can't use + // call_VM_leaf either as it will check to see if r13 & r14 are + // preserved and correspond to the bcp/locals pointers. So we do a + // runtime call by hand. + // +#ifndef _LP64 + __ push(thread); + __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, + JavaThread::check_special_condition_for_native_trans))); + __ increment(rsp, wordSize); + __ get_thread(thread); +#else + __ mov(c_rarg0, r15_thread); + __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) + __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows + __ andptr(rsp, -16); // align stack as required by ABI + __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); + __ mov(rsp, r12); // restore sp + __ reinit_heapbase(); +#endif // _LP64 + __ bind(Continue); + } + + // change thread state + __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java); + + // reset_last_Java_frame + __ reset_last_Java_frame(thread, true, true); + + // reset handle block + __ movptr(t, Address(thread, JavaThread::active_handles_offset())); + __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); + + // If result is an oop unbox and store it in frame where gc will see it + // and result handler will pick it up + + { + Label no_oop, store_result; + __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT))); + __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize)); + __ jcc(Assembler::notEqual, no_oop); + // retrieve result + __ pop(ltos); + __ testptr(rax, rax); + __ jcc(Assembler::zero, store_result); + __ movptr(rax, Address(rax, 0)); + __ bind(store_result); + __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax); + // keep stack depth as expected by pushing oop which will eventually be discarded + __ push(ltos); + __ bind(no_oop); + } + + + { + Label no_reguard; + __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()), + JavaThread::stack_guard_yellow_disabled); + __ jcc(Assembler::notEqual, no_reguard); + + __ pusha(); // XXX only save smashed registers +#ifndef _LP64 + __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); + __ popa(); +#else + __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) + __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows + __ andptr(rsp, -16); // align stack as required by ABI + __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); + __ mov(rsp, r12); // restore sp + __ popa(); // XXX only restore smashed registers + __ reinit_heapbase(); +#endif // _LP64 + + __ bind(no_reguard); + } + + + // The method register is junk from after the thread_in_native transition + // until here. Also can't call_VM until the bcp has been + // restored. Need bcp for throwing exception below so get it now. + __ get_method(method); + + // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base() + __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod* + __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase + + // handle exceptions (exception handling will handle unlocking!) + { + Label L; + __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD); + __ jcc(Assembler::zero, L); + // Note: At some point we may want to unify this with the code + // used in call_VM_base(); i.e., we should use the + // StubRoutines::forward_exception code. For now this doesn't work + // here because the rsp is not correctly set at this point. + __ MacroAssembler::call_VM(noreg, + CAST_FROM_FN_PTR(address, + InterpreterRuntime::throw_pending_exception)); + __ should_not_reach_here(); + __ bind(L); + } + + // do unlocking if necessary + { + Label L; + __ movl(t, Address(method, Method::access_flags_offset())); + __ testl(t, JVM_ACC_SYNCHRONIZED); + __ jcc(Assembler::zero, L); + // the code below should be shared with interpreter macro + // assembler implementation + { + Label unlock; + // BasicObjectLock will be first in list, since this is a + // synchronized method. However, need to check that the object + // has not been unlocked by an explicit monitorexit bytecode. + const Address monitor(rbp, + (intptr_t)(frame::interpreter_frame_initial_sp_offset * + wordSize - (int)sizeof(BasicObjectLock))); + + const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1); + + // monitor expect in c_rarg1 for slow unlock path + __ lea(regmon, monitor); // address of first monitor + + __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes())); + __ testptr(t, t); + __ jcc(Assembler::notZero, unlock); + + // Entry already unlocked, need to throw exception + __ MacroAssembler::call_VM(noreg, + CAST_FROM_FN_PTR(address, + InterpreterRuntime::throw_illegal_monitor_state_exception)); + __ should_not_reach_here(); + + __ bind(unlock); + __ unlock_object(regmon); + } + __ bind(L); + } + + // jvmti support + // Note: This must happen _after_ handling/throwing any exceptions since + // the exception handler code notifies the runtime of method exits + // too. If this happens before, method entry/exit notifications are + // not properly paired (was bug - gri 11/22/99). + __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI); + + // restore potential result in edx:eax, call result handler to + // restore potential result in ST0 & handle result + + __ pop(ltos); + LP64_ONLY( __ pop(dtos)); + + __ movptr(t, Address(rbp, + (frame::interpreter_frame_result_handler_offset) * wordSize)); + __ call(t); + + // remove activation + __ movptr(t, Address(rbp, + frame::interpreter_frame_sender_sp_offset * + wordSize)); // get sender sp + __ leave(); // remove frame anchor + __ pop(rdi); // get return address + __ mov(rsp, t); // set sp to sender sp + __ jmp(rdi); + + if (inc_counter) { + // Handle overflow of counter and compile method + __ bind(invocation_counter_overflow); + generate_counter_overflow(&continue_after_compile); + } + + return entry_point; +} + +// +// Generic interpreted method entry to (asm) interpreter +// +address InterpreterGenerator::generate_normal_entry(bool synchronized) { + // determine code generation flags + bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods; + + // ebx: Method* + // rbcp: sender sp + address entry_point = __ pc(); + + const Address constMethod(rbx, Method::const_offset()); + const Address access_flags(rbx, Method::access_flags_offset()); + const Address size_of_parameters(rdx, + ConstMethod::size_of_parameters_offset()); + const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset()); + + + // get parameter size (always needed) + __ movptr(rdx, constMethod); + __ load_unsigned_short(rcx, size_of_parameters); + + // rbx: Method* + // rcx: size of parameters + // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i ) + + __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words + __ subl(rdx, rcx); // rdx = no. of additional locals + + // YYY +// __ incrementl(rdx); +// __ andl(rdx, -2); + + // see if we've got enough room on the stack for locals plus overhead. + generate_stack_overflow_check(); + + // get return address + __ pop(rax); + + // compute beginning of parameters + __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize)); + + // rdx - # of additional locals + // allocate space for locals + // explicitly initialize locals + { + Label exit, loop; + __ testl(rdx, rdx); + __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0 + __ bind(loop); + __ push((int) NULL_WORD); // initialize local variables + __ decrementl(rdx); // until everything initialized + __ jcc(Assembler::greater, loop); + __ bind(exit); + } + + // initialize fixed part of activation frame + generate_fixed_frame(false); + + // make sure method is not native & not abstract +#ifdef ASSERT + __ movl(rax, access_flags); + { + Label L; + __ testl(rax, JVM_ACC_NATIVE); + __ jcc(Assembler::zero, L); + __ stop("tried to execute native method as non-native"); + __ bind(L); + } + { + Label L; + __ testl(rax, JVM_ACC_ABSTRACT); + __ jcc(Assembler::zero, L); + __ stop("tried to execute abstract method in interpreter"); + __ bind(L); + } +#endif + + // Since at this point in the method invocation the exception + // handler would try to exit the monitor of synchronized methods + // which hasn't been entered yet, we set the thread local variable + // _do_not_unlock_if_synchronized to true. The remove_activation + // will check this flag. + + const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread); + NOT_LP64(__ get_thread(thread)); + const Address do_not_unlock_if_synchronized(thread, + in_bytes(JavaThread::do_not_unlock_if_synchronized_offset())); + __ movbool(do_not_unlock_if_synchronized, true); + + __ profile_parameters_type(rax, rcx, rdx); + // increment invocation count & check for overflow + Label invocation_counter_overflow; + Label profile_method; + Label profile_method_continue; + if (inc_counter) { + generate_counter_incr(&invocation_counter_overflow, + &profile_method, + &profile_method_continue); + if (ProfileInterpreter) { + __ bind(profile_method_continue); + } + } + + Label continue_after_compile; + __ bind(continue_after_compile); + + // check for synchronized interpreted methods + bang_stack_shadow_pages(false); + + // reset the _do_not_unlock_if_synchronized flag + NOT_LP64(__ get_thread(thread)); + __ movbool(do_not_unlock_if_synchronized, false); + + // check for synchronized methods + // Must happen AFTER invocation_counter check and stack overflow check, + // so method is not locked if overflows. + if (synchronized) { + // Allocate monitor and lock method + lock_method(); + } else { + // no synchronization necessary +#ifdef ASSERT + { + Label L; + __ movl(rax, access_flags); + __ testl(rax, JVM_ACC_SYNCHRONIZED); + __ jcc(Assembler::zero, L); + __ stop("method needs synchronization"); + __ bind(L); + } +#endif + } + + // start execution +#ifdef ASSERT + { + Label L; + const Address monitor_block_top (rbp, + frame::interpreter_frame_monitor_block_top_offset * wordSize); + __ movptr(rax, monitor_block_top); + __ cmpptr(rax, rsp); + __ jcc(Assembler::equal, L); + __ stop("broken stack frame setup in interpreter"); + __ bind(L); + } +#endif + + // jvmti support + __ notify_method_entry(); + + __ dispatch_next(vtos); + + // invocation counter overflow + if (inc_counter) { + if (ProfileInterpreter) { + // We have decided to profile this method in the interpreter + __ bind(profile_method); + __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method)); + __ set_method_data_pointer_for_bcp(); + __ get_method(rbx); + __ jmp(profile_method_continue); + } + // Handle overflow of counter and compile method + __ bind(invocation_counter_overflow); + generate_counter_overflow(&continue_after_compile); + } + + return entry_point; +} + +//----------------------------------------------------------------------------- +// Exceptions + +void TemplateInterpreterGenerator::generate_throw_exception() { + // Entry point in previous activation (i.e., if the caller was + // interpreted) + Interpreter::_rethrow_exception_entry = __ pc(); + // Restore sp to interpreter_frame_last_sp even though we are going + // to empty the expression stack for the exception processing. + __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); + // rax: exception + // rdx: return address/pc that threw exception + __ restore_bcp(); // r13/rsi points to call/send + __ restore_locals(); + LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase. + // Entry point for exceptions thrown within interpreter code + Interpreter::_throw_exception_entry = __ pc(); + // expression stack is undefined here + // rax: exception + // r13/rsi: exception bcp + __ verify_oop(rax); + Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1); + LP64_ONLY(__ mov(c_rarg1, rax)); + + // expression stack must be empty before entering the VM in case of + // an exception + __ empty_expression_stack(); + // find exception handler address and preserve exception oop + __ call_VM(rdx, + CAST_FROM_FN_PTR(address, + InterpreterRuntime::exception_handler_for_exception), + rarg); + // rax: exception handler entry point + // rdx: preserved exception oop + // r13/rsi: bcp for exception handler + __ push_ptr(rdx); // push exception which is now the only value on the stack + __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!) + + // If the exception is not handled in the current frame the frame is + // removed and the exception is rethrown (i.e. exception + // continuation is _rethrow_exception). + // + // Note: At this point the bci is still the bxi for the instruction + // which caused the exception and the expression stack is + // empty. Thus, for any VM calls at this point, GC will find a legal + // oop map (with empty expression stack). + + // In current activation + // tos: exception + // esi: exception bcp + + // + // JVMTI PopFrame support + // + + Interpreter::_remove_activation_preserving_args_entry = __ pc(); + __ empty_expression_stack(); + // Set the popframe_processing bit in pending_popframe_condition + // indicating that we are currently handling popframe, so that + // call_VMs that may happen later do not trigger new popframe + // handling cycles. + const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); + NOT_LP64(__ get_thread(thread)); + __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset())); + __ orl(rdx, JavaThread::popframe_processing_bit); + __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx); + + { + // Check to see whether we are returning to a deoptimized frame. + // (The PopFrame call ensures that the caller of the popped frame is + // either interpreted or compiled and deoptimizes it if compiled.) + // In this case, we can't call dispatch_next() after the frame is + // popped, but instead must save the incoming arguments and restore + // them after deoptimization has occurred. + // + // Note that we don't compare the return PC against the + // deoptimization blob's unpack entry because of the presence of + // adapter frames in C2. + Label caller_not_deoptimized; + Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1); + __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize)); + __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, + InterpreterRuntime::interpreter_contains), rarg); + __ testl(rax, rax); + __ jcc(Assembler::notZero, caller_not_deoptimized); + + // Compute size of arguments for saving when returning to + // deoptimized caller + __ get_method(rax); + __ movptr(rax, Address(rax, Method::const_offset())); + __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod:: + size_of_parameters_offset()))); + __ shll(rax, Interpreter::logStackElementSize); + __ restore_locals(); + __ subptr(rlocals, rax); + __ addptr(rlocals, wordSize); + // Save these arguments + NOT_LP64(__ get_thread(thread)); + __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, + Deoptimization:: + popframe_preserve_args), + thread, rax, rlocals); + + __ remove_activation(vtos, rdx, + /* throw_monitor_exception */ false, + /* install_monitor_exception */ false, + /* notify_jvmdi */ false); + + // Inform deoptimization that it is responsible for restoring + // these arguments + NOT_LP64(__ get_thread(thread)); + __ movl(Address(thread, JavaThread::popframe_condition_offset()), + JavaThread::popframe_force_deopt_reexecution_bit); + + // Continue in deoptimization handler + __ jmp(rdx); + + __ bind(caller_not_deoptimized); + } + + __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */ + /* throw_monitor_exception */ false, + /* install_monitor_exception */ false, + /* notify_jvmdi */ false); + + // Finish with popframe handling + // A previous I2C followed by a deoptimization might have moved the + // outgoing arguments further up the stack. PopFrame expects the + // mutations to those outgoing arguments to be preserved and other + // constraints basically require this frame to look exactly as + // though it had previously invoked an interpreted activation with + // no space between the top of the expression stack (current + // last_sp) and the top of stack. Rather than force deopt to + // maintain this kind of invariant all the time we call a small + // fixup routine to move the mutated arguments onto the top of our + // expression stack if necessary. +#ifndef _LP64 + __ mov(rax, rsp); + __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); + __ get_thread(thread); + // PC must point into interpreter here + __ set_last_Java_frame(thread, noreg, rbp, __ pc()); + __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx); + __ get_thread(thread); +#else + __ mov(c_rarg1, rsp); + __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); + // PC must point into interpreter here + __ set_last_Java_frame(noreg, rbp, __ pc()); + __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2); +#endif + __ reset_last_Java_frame(thread, true, true); + + // Restore the last_sp and null it out + __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize)); + __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD); + + __ restore_bcp(); + __ restore_locals(); + // The method data pointer was incremented already during + // call profiling. We have to restore the mdp for the current bcp. + if (ProfileInterpreter) { + __ set_method_data_pointer_for_bcp(); + } + + // Clear the popframe condition flag + NOT_LP64(__ get_thread(thread)); + __ movl(Address(thread, JavaThread::popframe_condition_offset()), + JavaThread::popframe_inactive); + +#if INCLUDE_JVMTI + { + Label L_done; + const Register local0 = rlocals; + + __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic); + __ jcc(Assembler::notEqual, L_done); + + // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call. + // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL. + + __ get_method(rdx); + __ movptr(rax, Address(local0, 0)); + __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp); + + __ testptr(rax, rax); + __ jcc(Assembler::zero, L_done); + + __ movptr(Address(rbx, 0), rax); + __ bind(L_done); + } +#endif // INCLUDE_JVMTI + + __ dispatch_next(vtos); + // end of PopFrame support + + Interpreter::_remove_activation_entry = __ pc(); + + // preserve exception over this code sequence + __ pop_ptr(rax); + NOT_LP64(__ get_thread(thread)); + __ movptr(Address(thread, JavaThread::vm_result_offset()), rax); + // remove the activation (without doing throws on illegalMonitorExceptions) + __ remove_activation(vtos, rdx, false, true, false); + // restore exception + NOT_LP64(__ get_thread(thread)); + __ get_vm_result(rax, thread); + + // In between activations - previous activation type unknown yet + // compute continuation point - the continuation point expects the + // following registers set up: + // + // rax: exception + // rdx: return address/pc that threw exception + // rsp: expression stack of caller + // rbp: ebp of caller + __ push(rax); // save exception + __ push(rdx); // save return address + __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, + SharedRuntime::exception_handler_for_return_address), + thread, rdx); + __ mov(rbx, rax); // save exception handler + __ pop(rdx); // restore return address + __ pop(rax); // restore exception + // Note that an "issuing PC" is actually the next PC after the call + __ jmp(rbx); // jump to exception + // handler of caller +} + + +// +// JVMTI ForceEarlyReturn support +// +address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) { + address entry = __ pc(); + + __ restore_bcp(); + __ restore_locals(); + __ empty_expression_stack(); + __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse + + const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread); + NOT_LP64(__ get_thread(thread)); + __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset())); + Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset()); + + // Clear the earlyret state + __ movl(cond_addr, JvmtiThreadState::earlyret_inactive); + + __ remove_activation(state, rsi, + false, /* throw_monitor_exception */ + false, /* install_monitor_exception */ + true); /* notify_jvmdi */ + __ jmp(rsi); + + return entry; +} // end of ForceEarlyReturn support + + +//----------------------------------------------------------------------------- +// Helper for vtos entry point generation + +void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t, + address& bep, + address& cep, + address& sep, + address& aep, + address& iep, + address& lep, + address& fep, + address& dep, + address& vep) { + assert(t->is_valid() && t->tos_in() == vtos, "illegal template"); + Label L; + aep = __ pc(); __ push_ptr(); __ jmp(L); +#ifndef _LP64 + fep = __ pc(); __ push(ftos); __ jmp(L); + dep = __ pc(); __ push(dtos); __ jmp(L); +#else + fep = __ pc(); __ push_f(xmm0); __ jmp(L); + dep = __ pc(); __ push_d(xmm0); __ jmp(L); +#endif // _LP64 + lep = __ pc(); __ push_l(); __ jmp(L); + bep = cep = sep = + iep = __ pc(); __ push_i(); + vep = __ pc(); + __ bind(L); + generate_and_dispatch(t); +} + + +//----------------------------------------------------------------------------- +// Generation of individual instructions + +// helpers for generate_and_dispatch + + +InterpreterGenerator::InterpreterGenerator(StubQueue* code) + : TemplateInterpreterGenerator(code) { + generate_all(); // down here so it can be "virtual" +} + +//----------------------------------------------------------------------------- + +// Non-product code +#ifndef PRODUCT + +address TemplateInterpreterGenerator::generate_trace_code(TosState state) { + address entry = __ pc(); + +#ifndef _LP64 + // prepare expression stack + __ pop(rcx); // pop return address so expression stack is 'pure' + __ push(state); // save tosca + + // pass tosca registers as arguments & call tracer + __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx); + __ mov(rcx, rax); // make sure return address is not destroyed by pop(state) + __ pop(state); // restore tosca + + // return + __ jmp(rcx); +#else + __ push(state); + __ push(c_rarg0); + __ push(c_rarg1); + __ push(c_rarg2); + __ push(c_rarg3); + __ mov(c_rarg2, rax); // Pass itos +#ifdef _WIN64 + __ movflt(xmm3, xmm0); // Pass ftos +#endif + __ call_VM(noreg, + CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), + c_rarg1, c_rarg2, c_rarg3); + __ pop(c_rarg3); + __ pop(c_rarg2); + __ pop(c_rarg1); + __ pop(c_rarg0); + __ pop(state); + __ ret(0); // return from result handler +#endif // _LP64 + + return entry; +} + +void TemplateInterpreterGenerator::count_bytecode() { + __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value)); +} + +void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { + __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()])); +} + +void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { + __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index)); + __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes); + __ orl(rbx, + ((int) t->bytecode()) << + BytecodePairHistogram::log2_number_of_codes); + __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx); + __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters)); + __ incrementl(Address(rscratch1, rbx, Address::times_4)); +} + + +void TemplateInterpreterGenerator::trace_bytecode(Template* t) { + // Call a little run-time stub to avoid blow-up for each bytecode. + // The run-time runtime saves the right registers, depending on + // the tosca in-state for the given template. + + assert(Interpreter::trace_code(t->tos_in()) != NULL, + "entry must have been generated"); +#ifndef _LP64 + __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); +#else + __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM) + __ andptr(rsp, -16); // align stack as required by ABI + __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in()))); + __ mov(rsp, r12); // restore sp + __ reinit_heapbase(); +#endif // _LP64 +} + + +void TemplateInterpreterGenerator::stop_interpreter_at() { + Label L; + __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value), + StopInterpreterAt); + __ jcc(Assembler::notEqual, L); + __ int3(); + __ bind(L); +} +#endif // !PRODUCT +#endif // ! CC_INTERP