--- a/hotspot/src/cpu/x86/vm/templateInterpreter_x86_32.cpp Wed Jul 05 21:08:30 2017 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1916 +0,0 @@
-/*
- * Copyright (c) 1997, 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
-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();
-
- // Note: There should be a minimal interpreter frame set up when stack
- // overflow occurs since we check explicitly for it now.
- //
-#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();
- __ empty_FPU_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();
- __ empty_FPU_stack();
- // setup parameters
- // ??? convention: expect aberrant index in register rbx,
- __ lea(rax, ExternalAddress((address)name));
- __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::throw_ArrayIndexOutOfBoundsException), rax, rbx);
- return entry;
-}
-
-address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
- address entry = __ pc();
- // object is at TOS
- __ pop(rax);
- // expression stack must be empty before entering the VM if an exception
- // happened
- __ empty_expression_stack();
- __ empty_FPU_stack();
- __ call_VM(noreg,
- CAST_FROM_FN_PTR(address,
- InterpreterRuntime::throw_ClassCastException),
- rax);
- 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();
- if (pass_oop) {
- // object is at TOS
- __ pop(rbx);
- }
- // expression stack must be empty before entering the VM if an exception happened
- __ empty_expression_stack();
- __ empty_FPU_stack();
- // setup parameters
- __ lea(rax, ExternalAddress((address)name));
- if (pass_oop) {
- __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_klass_exception), rax, rbx);
- } else {
- if (message != NULL) {
- __ lea(rbx, ExternalAddress((address)message));
- } else {
- __ movptr(rbx, NULL_WORD);
- }
- __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception), rax, rbx);
- }
- // 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), NULL_WORD);
- __ dispatch_next(state);
- return entry;
-}
-
-
-address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
- address entry = __ pc();
-
-#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
- 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");
- }
-
- // 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 rsp is now tos until next java call
- __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), 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();
-
- 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");
- }
-
- // The stack is not extended by deopt but we must NULL last_sp as this
- // entry is like a "return".
- __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), NULL_WORD);
- __ restore_bcp();
- __ restore_locals();
- // handle exceptions
- { Label L;
- const Register thread = rcx;
- __ get_thread(thread);
- __ 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;
-}
-
-
-int AbstractInterpreter::BasicType_as_index(BasicType type) {
- int i = 0;
- switch (type) {
- case T_BOOLEAN: i = 0; break;
- case T_CHAR : i = 1; break;
- case T_BYTE : i = 2; break;
- case T_SHORT : i = 3; break;
- case T_INT : // fall through
- case T_LONG : // fall through
- case T_VOID : i = 4; break;
- case T_FLOAT : i = 5; break; // have to treat float and double separately for SSE
- case T_DOUBLE : i = 6; break;
- case T_OBJECT : // fall through
- case T_ARRAY : i = 7; break;
- default : ShouldNotReachHere();
- }
- assert(0 <= i && i < AbstractInterpreter::number_of_result_handlers, "index out of bounds");
- return i;
-}
-
-
-address TemplateInterpreterGenerator::generate_result_handler_for(BasicType type) {
- address entry = __ pc();
- switch (type) {
- case T_BOOLEAN: __ c2bool(rax); break;
- case T_CHAR : __ andptr(rax, 0xFFFF); break;
- case T_BYTE : __ sign_extend_byte (rax); break;
- case T_SHORT : __ sign_extend_short(rax); break;
- case T_INT : /* nothing to do */ break;
- case T_LONG : /* nothing to do */ break;
- case T_VOID : /* nothing to do */ break;
- 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;
- 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 MethodCounters* 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
- // BytecodeInterpreter only calls for native so code is elided.
-
- 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
- // rdi - locals
- // rsi - bcp
- // rbx, - method
- // rdx - cpool
- // rbp, - interpreter frame
-
- // C++ interpreter on entry
- // rsi - new interpreter state pointer
- // rbp - interpreter frame pointer
- // rbx - method
-
- // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
- // rbx, - method
- // rcx - rcvr (assuming there is one)
- // top of stack return address of interpreter caller
- // rsp - sender_sp
-
- // C++ interpreter only
- // rsi - previous interpreter state pointer
-
- // InterpreterRuntime::frequency_counter_overflow takes one argument
- // indicating if the counter overflow occurs at a backwards branch (non-NULL bcp).
- // 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).
- __ movptr(rax, (intptr_t)false);
- __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::frequency_counter_overflow), rax);
-
- __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
-
- // Preserve invariant that rsi/rdi contain bcp/locals of sender frame
- // and jump to the interpreted entry.
- __ jmp(*do_continue, relocInfo::none);
-
-}
-
-void InterpreterGenerator::generate_stack_overflow_check(void) {
- // 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.
- //
- // Registers live on entry:
- //
- // Asm interpreter
- // rdx: number of additional locals this frame needs (what we must check)
- // rbx,: Method*
-
- // destroyed on exit
- // rax,
-
- // NOTE: since the additional locals are also always pushed (wasn't obvious in
- // generate_fixed_frame) so the guard should work for them too.
- //
-
- // 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, thru 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;
-
- __ push(rsi);
-
- const Register thread = rsi;
-
- __ get_thread(thread);
-
- const Address stack_base(thread, Thread::stack_base_offset());
- const Address stack_size(thread, Thread::stack_size_offset());
-
- // locals + overhead, in bytes
- __ lea(rax, Address(noreg, rdx, Interpreter::stackElementScale(), 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);
- __ addptr(rax, max_pages * page_size);
-
- // check against the current stack bottom
- __ cmpptr(rsp, rax);
- __ jcc(Assembler::above, after_frame_check_pop);
-
- __ pop(rsi); // get saved bcp / (c++ prev state ).
-
- // 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, rsi);
- __ 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);
- __ pop(rsi);
-
- __ bind(after_frame_check);
-}
-
-// Allocate monitor and lock method (asm interpreter)
-// rbx, - Method*
-//
-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
- { Label done;
- const int mirror_offset = in_bytes(Klass::java_mirror_offset());
- __ movl(rax, access_flags);
- __ testl(rax, JVM_ACC_STATIC);
- __ movptr(rax, Address(rdi, Interpreter::local_offset_in_bytes(0))); // get receiver (assume this is frequent case)
- __ 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));
- __ 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
- __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax); // store object
- __ mov(rdx, rsp); // object address
- __ lock_object(rdx);
-}
-
-//
-// Generate a fixed interpreter frame. This is identical setup for interpreted methods
-// and for native methods hence the shared code.
-
-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(rsi); // set sender sp
- __ push((int32_t)NULL_WORD); // leave last_sp as null
- __ movptr(rsi, Address(rbx,Method::const_offset())); // get ConstMethod*
- __ lea(rsi, Address(rsi,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(rdi); // set locals pointer
- if (native_call) {
- __ push(0); // no bcp
- } else {
- __ push(rsi); // set bcp
- }
- __ push(0); // reserve word for pointer to expression stack bottom
- __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
-}
-
-
-// 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 below 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.
- //
- // This code is based on generate_accessor_enty.
-
- // rbx,: Method*
- // rcx: receiver (preserve for slow entry into asm interpreter)
-
- // rsi: senderSP must preserved 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;
-
- // 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 (must be preserved across the G1 barrier call)
- //
- // rbx: method (at this point it's scratch)
- // rcx: receiver (at this point it's scratch)
- // rdx: scratch
- // rdi: scratch
- //
- // rsi: sender sp
-
- // Preserve the sender sp in case the pre-barrier
- // calls the runtime
- __ push(rsi);
-
- // Load the value of the referent field.
- const Address field_address(rax, referent_offset);
- __ movptr(rax, field_address);
-
- // Generate the G1 pre-barrier code to log the value of
- // the referent field in an SATB buffer.
- __ get_thread(rcx);
- __ g1_write_barrier_pre(noreg /* obj */,
- rax /* pre_val */,
- rcx /* thread */,
- rbx /* tmp */,
- true /* tosca_save */,
- true /* expand_call */);
-
- // _areturn
- __ pop(rsi); // get sender sp
- __ pop(rdi); // get return address
- __ mov(rsp, rsi); // set sp to sender sp
- __ jmp(rdi);
-
- __ 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;
-}
-
-/**
- * Method entry for static native methods:
- * int java.util.zip.CRC32.update(int crc, int b)
- */
-address InterpreterGenerator::generate_CRC32_update_entry() {
- if (UseCRC32Intrinsics) {
- address entry = __ pc();
-
- // rbx: Method*
- // rsi: senderSP must preserved for slow path, set SP to it on fast path
- // rdx: scratch
- // rdi: scratch
-
- Label slow_path;
- // If we need a safepoint check, generate full interpreter entry.
- ExternalAddress state(SafepointSynchronize::address_of_state());
- __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
- SafepointSynchronize::_not_synchronized);
- __ jcc(Assembler::notEqual, slow_path);
-
- // We don't generate local frame and don't align stack because
- // we call stub code and there is no safepoint on this path.
-
- // Load parameters
- const Register crc = rax; // crc
- const Register val = rdx; // source java byte value
- const Register tbl = rdi; // scratch
-
- // Arguments are reversed on java expression stack
- __ movl(val, Address(rsp, wordSize)); // byte value
- __ movl(crc, Address(rsp, 2*wordSize)); // Initial CRC
-
- __ lea(tbl, ExternalAddress(StubRoutines::crc_table_addr()));
- __ notl(crc); // ~crc
- __ update_byte_crc32(crc, val, tbl);
- __ notl(crc); // ~crc
- // result in rax
-
- // _areturn
- __ pop(rdi); // get return address
- __ mov(rsp, rsi); // set sp to sender sp
- __ jmp(rdi);
-
- // generate a vanilla native entry as the slow path
- __ bind(slow_path);
- __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
- return entry;
- }
- return NULL;
-}
-
-/**
- * Method entry for static native methods:
- * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
- * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
- */
-address InterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
- if (UseCRC32Intrinsics) {
- address entry = __ pc();
-
- // rbx,: Method*
- // rsi: senderSP must preserved for slow path, set SP to it on fast path
- // rdx: scratch
- // rdi: scratch
-
- Label slow_path;
- // If we need a safepoint check, generate full interpreter entry.
- ExternalAddress state(SafepointSynchronize::address_of_state());
- __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
- SafepointSynchronize::_not_synchronized);
- __ jcc(Assembler::notEqual, slow_path);
-
- // We don't generate local frame and don't align stack because
- // we call stub code and there is no safepoint on this path.
-
- // Load parameters
- const Register crc = rax; // crc
- const Register buf = rdx; // source java byte array address
- const Register len = rdi; // length
-
- // value x86_32
- // interp. arg ptr ESP + 4
- // int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
- // 3 2 1 0
- // int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
- // 4 2,3 1 0
-
- // Arguments are reversed on java expression stack
- __ movl(len, Address(rsp, 4 + 0)); // Length
- // Calculate address of start element
- if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
- __ movptr(buf, Address(rsp, 4 + 2 * wordSize)); // long buf
- __ addptr(buf, Address(rsp, 4 + 1 * wordSize)); // + offset
- __ movl(crc, Address(rsp, 4 + 4 * wordSize)); // Initial CRC
- } else {
- __ movptr(buf, Address(rsp, 4 + 2 * wordSize)); // byte[] array
- __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
- __ addptr(buf, Address(rsp, 4 + 1 * wordSize)); // + offset
- __ movl(crc, Address(rsp, 4 + 3 * wordSize)); // Initial CRC
- }
-
- __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()), crc, buf, len);
- // result in rax
-
- // _areturn
- __ pop(rdi); // get return address
- __ mov(rsp, rsi); // set sp to sender sp
- __ jmp(rdi);
-
- // generate a vanilla native entry as the slow path
- __ bind(slow_path);
- __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
- return entry;
- }
- return NULL;
-}
-
-/**
-* Method entry for static native methods:
-* int java.util.zip.CRC32C.updateBytes(int crc, byte[] b, int off, int end)
-* int java.util.zip.CRC32C.updateByteBuffer(int crc, long address, int off, int end)
-*/
-address InterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
- if (UseCRC32CIntrinsics) {
- address entry = __ pc();
- // Load parameters
- const Register crc = rax; // crc
- const Register buf = rcx; // source java byte array address
- const Register len = rdx; // length
- const Register end = len;
-
- // value x86_32
- // interp. arg ptr ESP + 4
- // int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int end)
- // 3 2 1 0
- // int java.util.zip.CRC32.updateByteBuffer(int crc, long address, int off, int end)
- // 4 2,3 1 0
-
- // Arguments are reversed on java expression stack
- __ movl(end, Address(rsp, 4 + 0)); // end
- __ subl(len, Address(rsp, 4 + 1 * wordSize)); // end - offset == length
- // Calculate address of start element
- if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) {
- __ movptr(buf, Address(rsp, 4 + 2 * wordSize)); // long address
- __ addptr(buf, Address(rsp, 4 + 1 * wordSize)); // + offset
- __ movl(crc, Address(rsp, 4 + 4 * wordSize)); // Initial CRC
- } else {
- __ movptr(buf, Address(rsp, 4 + 2 * wordSize)); // byte[] array
- __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
- __ addptr(buf, Address(rsp, 4 + 1 * wordSize)); // + offset
- __ movl(crc, Address(rsp, 4 + 3 * wordSize)); // Initial CRC
- }
- __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32C()), crc, buf, len);
- // result in rax
- // _areturn
- __ pop(rdi); // get return address
- __ mov(rsp, rsi); // set sp to sender sp
- __ jmp(rdi);
-
- return entry;
- }
- return NULL;
-}
-
-/**
- * Method entry for static native method:
- * java.lang.Float.intBitsToFloat(int bits)
- */
-address InterpreterGenerator::generate_Float_intBitsToFloat_entry() {
- if (UseSSE >= 1) {
- address entry = __ pc();
-
- // rsi: the sender's SP
-
- // Skip safepoint check (compiler intrinsic versions of this method
- // do not perform safepoint checks either).
-
- // Load 'bits' into xmm0 (interpreter returns results in xmm0)
- __ movflt(xmm0, Address(rsp, wordSize));
-
- // Return
- __ pop(rdi); // get return address
- __ mov(rsp, rsi); // set rsp to the sender's SP
- __ jmp(rdi);
- return entry;
- }
-
- return NULL;
-}
-
-/**
- * Method entry for static native method:
- * java.lang.Float.floatToRawIntBits(float value)
- */
-address InterpreterGenerator::generate_Float_floatToRawIntBits_entry() {
- if (UseSSE >= 1) {
- address entry = __ pc();
-
- // rsi: the sender's SP
-
- // Skip safepoint check (compiler intrinsic versions of this method
- // do not perform safepoint checks either).
-
- // Load the parameter (a floating-point value) into rax.
- __ movl(rax, Address(rsp, wordSize));
-
- // Return
- __ pop(rdi); // get return address
- __ mov(rsp, rsi); // set rsp to the sender's SP
- __ jmp(rdi);
- return entry;
- }
-
- return NULL;
-}
-
-
-/**
- * Method entry for static native method:
- * java.lang.Double.longBitsToDouble(long bits)
- */
-address InterpreterGenerator::generate_Double_longBitsToDouble_entry() {
- if (UseSSE >= 2) {
- address entry = __ pc();
-
- // rsi: the sender's SP
-
- // Skip safepoint check (compiler intrinsic versions of this method
- // do not perform safepoint checks either).
-
- // Load 'bits' into xmm0 (interpreter returns results in xmm0)
- __ movdbl(xmm0, Address(rsp, wordSize));
-
- // Return
- __ pop(rdi); // get return address
- __ mov(rsp, rsi); // set rsp to the sender's SP
- __ jmp(rdi);
- return entry;
- }
-
- return NULL;
-}
-
-/**
- * Method entry for static native method:
- * java.lang.Double.doubleToRawLongBits(double value)
- */
-address InterpreterGenerator::generate_Double_doubleToRawLongBits_entry() {
- if (UseSSE >= 2) {
- address entry = __ pc();
-
- // rsi: the sender's SP
-
- // Skip safepoint check (compiler intrinsic versions of this method
- // do not perform safepoint checks either).
-
- // Load the parameter (a floating-point value) into rax.
- __ movl(rdx, Address(rsp, 2*wordSize));
- __ movl(rax, Address(rsp, wordSize));
-
- // Return
- __ pop(rdi); // get return address
- __ mov(rsp, rsi); // set rsp to the sender's SP
- __ jmp(rdi);
- return entry;
- }
-
- 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*
- // rsi: sender sp
- // rsi: previous interpreter state (C++ interpreter) must preserve
- 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
- // rsi: sender sp
-
- __ pop(rax); // get return address
- // for natives the size of locals is zero
-
- // compute beginning of parameters (rdi)
- __ lea(rdi, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
-
-
- // add 2 zero-initialized slots for native calls
- // NULL result handler
- __ push((int32_t)NULL_WORD);
- // NULL oop temp (mirror or jni oop result)
- __ push((int32_t)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.
-
- __ get_thread(rax);
- const Address do_not_unlock_if_synchronized(rax,
- 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
- __ get_thread(rax);
- __ 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/dtrace support
- __ notify_method_entry();
-
- // work registers
- const Register method = rbx;
- const Register thread = rdi;
- const Register t = rcx;
-
- // 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()));
-
- __ 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
-
- // 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() == rdi, "adjust this code");
- assert(InterpreterRuntime::SignatureHandlerGenerator::to () == rsp, "adjust this code");
- assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == t , "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 will blow RBX
- // sometime, so we must reload it after the call.
- __ call(t);
- __ get_method(method); // slow path call blows RBX on DevStudio 5.0
-
- // 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
- __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
- __ movptr(Address(rsp, wordSize), t);
- __ 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
- __ 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());
-
- // 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(rax);
-
- // result potentially in rdx:rax or ST0
-
- // Verify or restore cpu control state after JNI call
- __ restore_cpu_control_state_after_jni();
-
- // 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);
- }
- __ push(ltos);
-
- // change thread state
- __ 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);
- }
- }
-
- if (AlwaysRestoreFPU) {
- // Make sure the control word is correct.
- __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
- }
-
- // 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 rsi & rdi are
- // preserved and correspond to the bcp/locals pointers. So we do a runtime call
- // by hand.
- //
- __ push(thread);
- __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
- JavaThread::check_special_condition_for_native_trans)));
- __ increment(rsp, wordSize);
- __ get_thread(thread);
-
- __ bind(Continue);
- }
-
- // change thread state
- __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
-
- __ 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()), NULL_WORD);
-
- // If result was an oop then unbox and save it in the frame
- { Label L;
- Label no_oop, store_result;
- ExternalAddress handler(AbstractInterpreter::result_handler(T_OBJECT));
- __ cmpptr(Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize),
- handler.addr());
- __ jcc(Assembler::notEqual, no_oop);
- __ cmpptr(Address(rsp, 0), (int32_t)NULL_WORD);
- __ pop(ltos);
- __ testptr(rax, rax);
- __ jcc(Assembler::zero, store_result);
- // unbox
- __ 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();
- __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
- __ popa();
-
- __ bind(no_reguard);
- }
-
- // restore rsi to have legal interpreter frame,
- // i.e., bci == 0 <=> rsi == code_base()
- // Can't call_VM until bcp is within reasonable.
- __ get_method(method); // method is junk from thread_in_native to now.
- __ movptr(rsi, Address(method,Method::const_offset())); // get ConstMethod*
- __ lea(rsi, Address(rsi,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, frame::interpreter_frame_initial_sp_offset * wordSize - (int)sizeof(BasicObjectLock));
-
- __ lea(rdx, monitor); // address of first monitor
-
- __ movptr(t, Address(rdx, 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(rdx);
- }
- __ bind(L);
- }
-
- // jvmti/dtrace 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 rdx:rax, call result handler to restore potential result in ST0 & handle result
- __ pop(ltos);
- __ 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;
-
- // rbx,: Method*
- // rsi: 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
-
- // rsi: 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
-
- // 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 (rdi)
- __ lea(rdi, 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((int32_t)NULL_WORD); // initialize local variables
- __ decrement(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.
-
- __ get_thread(rax);
- const Address do_not_unlock_if_synchronized(rax,
- 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);
-
- bang_stack_shadow_pages(false);
-
- // reset the _do_not_unlock_if_synchronized flag
- __ get_thread(rax);
- __ 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;
-}
-
-
-// These should never be compiled since the interpreter will prefer
-// the compiled version to the intrinsic version.
-bool AbstractInterpreter::can_be_compiled(methodHandle m) {
- switch (method_kind(m)) {
- case Interpreter::java_lang_math_sin : // fall thru
- case Interpreter::java_lang_math_cos : // fall thru
- case Interpreter::java_lang_math_tan : // fall thru
- case Interpreter::java_lang_math_abs : // fall thru
- case Interpreter::java_lang_math_log : // fall thru
- case Interpreter::java_lang_math_log10 : // fall thru
- case Interpreter::java_lang_math_sqrt : // fall thru
- case Interpreter::java_lang_math_pow : // fall thru
- case Interpreter::java_lang_math_exp :
- return false;
- default:
- return true;
- }
-}
-
-// How much stack a method activation needs in words.
-int AbstractInterpreter::size_top_interpreter_activation(Method* method) {
-
- const int stub_code = 4; // see generate_call_stub
- // Save space for one monitor to get into the interpreted method in case
- // the method is synchronized
- int monitor_size = method->is_synchronized() ?
- 1*frame::interpreter_frame_monitor_size() : 0;
-
- // total overhead size: entry_size + (saved rbp, thru 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;
-
- const int method_stack = (method->max_locals() + method->max_stack()) *
- Interpreter::stackElementWords;
- return overhead_size + method_stack + stub_code;
-}
-
-//------------------------------------------------------------------------------------------------------------------------
-// Exceptions
-
-void TemplateInterpreterGenerator::generate_throw_exception() {
- // Entry point in previous activation (i.e., if the caller was interpreted)
- Interpreter::_rethrow_exception_entry = __ pc();
- const Register thread = rcx;
-
- // 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), NULL_WORD);
- // rax,: exception
- // rdx: return address/pc that threw exception
- __ restore_bcp(); // rsi points to call/send
- __ restore_locals();
-
- // Entry point for exceptions thrown within interpreter code
- Interpreter::_throw_exception_entry = __ pc();
- // expression stack is undefined here
- // rax,: exception
- // rsi: exception bcp
- __ verify_oop(rax);
-
- // expression stack must be empty before entering the VM in case of an exception
- __ empty_expression_stack();
- __ empty_FPU_stack();
- // find exception handler address and preserve exception oop
- __ call_VM(rdx, CAST_FROM_FN_PTR(address, InterpreterRuntime::exception_handler_for_exception), rax);
- // rax,: exception handler entry point
- // rdx: preserved exception oop
- // 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
- // rsi: exception bcp
-
- //
- // JVMTI PopFrame support
- //
-
- Interpreter::_remove_activation_preserving_args_entry = __ pc();
- __ empty_expression_stack();
- __ empty_FPU_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.
- __ 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;
- __ movptr(rdx, Address(rbp, frame::return_addr_offset * wordSize));
- __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::interpreter_contains), rdx);
- __ 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, ConstMethod::size_of_parameters_offset()));
- __ shlptr(rax, Interpreter::logStackElementSize);
- __ restore_locals();
- __ subptr(rdi, rax);
- __ addptr(rdi, wordSize);
- // Save these arguments
- __ get_thread(thread);
- __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, Deoptimization::popframe_preserve_args), thread, rax, rdi);
-
- __ 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
- __ 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,
- /* 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.
- __ 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);
- __ 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), 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
- __ get_thread(thread);
- __ movl(Address(thread, JavaThread::popframe_condition_offset()), JavaThread::popframe_inactive);
-
-#if INCLUDE_JVMTI
- {
- Label L_done;
- const Register local0 = rdi;
-
- __ cmpb(Address(rsi, 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, rsi);
-
- __ 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);
- __ 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
- __ get_thread(thread);
- __ get_vm_result(rax, thread);
-
- // Inbetween 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: rbp, 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();
- const Register thread = rcx;
-
- __ restore_bcp();
- __ restore_locals();
- __ empty_expression_stack();
- __ empty_FPU_stack();
- __ load_earlyret_value(state);
-
- __ get_thread(thread);
- __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
- const 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;
- fep = __ pc(); __ push(ftos); __ jmp(L);
- dep = __ pc(); __ push(dtos); __ jmp(L);
- lep = __ pc(); __ push(ltos); __ jmp(L);
- aep = __ pc(); __ push(atos); __ jmp(L);
- bep = cep = sep = // fall through
- iep = __ pc(); __ push(itos); // fall through
- vep = __ pc(); __ bind(L); // fall through
- 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();
-
- // 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);
-
- 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(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
- __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
- __ orl(rbx, ((int)t->bytecode()) << BytecodePairHistogram::log2_number_of_codes);
- ExternalAddress table((address) BytecodePairHistogram::_counters);
- Address index(noreg, rbx, Address::times_4);
- __ incrementl(ArrayAddress(table, index));
-}
-
-
-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");
- __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
-}
-
-
-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