/*
* Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2014, Red Hat Inc. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "asm/assembler.hpp"
#include "c1/c1_CodeStubs.hpp"
#include "c1/c1_Defs.hpp"
#include "c1/c1_MacroAssembler.hpp"
#include "c1/c1_Runtime1.hpp"
#include "compiler/disassembler.hpp"
#include "gc/shared/cardTable.hpp"
#include "gc/shared/cardTableBarrierSet.hpp"
#include "interpreter/interpreter.hpp"
#include "nativeInst_aarch64.hpp"
#include "oops/compiledICHolder.hpp"
#include "oops/oop.inline.hpp"
#include "prims/jvmtiExport.hpp"
#include "register_aarch64.hpp"
#include "runtime/sharedRuntime.hpp"
#include "runtime/signature.hpp"
#include "runtime/vframe.hpp"
#include "runtime/vframeArray.hpp"
#include "vmreg_aarch64.inline.hpp"
// Implementation of StubAssembler
int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, int args_size) {
// setup registers
assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different");
assert(oop_result1 != rthread && metadata_result != rthread, "registers must be different");
assert(args_size >= 0, "illegal args_size");
bool align_stack = false;
mov(c_rarg0, rthread);
set_num_rt_args(0); // Nothing on stack
Label retaddr;
set_last_Java_frame(sp, rfp, retaddr, rscratch1);
// do the call
lea(rscratch1, RuntimeAddress(entry));
blrt(rscratch1, args_size + 1, 8, 1);
bind(retaddr);
int call_offset = offset();
// verify callee-saved register
#ifdef ASSERT
push(r0, sp);
{ Label L;
get_thread(r0);
cmp(rthread, r0);
br(Assembler::EQ, L);
stop("StubAssembler::call_RT: rthread not callee saved?");
bind(L);
}
pop(r0, sp);
#endif
reset_last_Java_frame(true);
maybe_isb();
// check for pending exceptions
{ Label L;
// check for pending exceptions (java_thread is set upon return)
ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset())));
cbz(rscratch1, L);
// exception pending => remove activation and forward to exception handler
// make sure that the vm_results are cleared
if (oop_result1->is_valid()) {
str(zr, Address(rthread, JavaThread::vm_result_offset()));
}
if (metadata_result->is_valid()) {
str(zr, Address(rthread, JavaThread::vm_result_2_offset()));
}
if (frame_size() == no_frame_size) {
leave();
far_jump(RuntimeAddress(StubRoutines::forward_exception_entry()));
} else if (_stub_id == Runtime1::forward_exception_id) {
should_not_reach_here();
} else {
far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
}
bind(L);
}
// get oop results if there are any and reset the values in the thread
if (oop_result1->is_valid()) {
get_vm_result(oop_result1, rthread);
}
if (metadata_result->is_valid()) {
get_vm_result_2(metadata_result, rthread);
}
return call_offset;
}
int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) {
mov(c_rarg1, arg1);
return call_RT(oop_result1, metadata_result, entry, 1);
}
int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) {
if (c_rarg1 == arg2) {
if (c_rarg2 == arg1) {
mov(rscratch1, arg1);
mov(arg1, arg2);
mov(arg2, rscratch1);
} else {
mov(c_rarg2, arg2);
mov(c_rarg1, arg1);
}
} else {
mov(c_rarg1, arg1);
mov(c_rarg2, arg2);
}
return call_RT(oop_result1, metadata_result, entry, 2);
}
int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) {
// if there is any conflict use the stack
if (arg1 == c_rarg2 || arg1 == c_rarg3 ||
arg2 == c_rarg1 || arg1 == c_rarg3 ||
arg3 == c_rarg1 || arg1 == c_rarg2) {
stp(arg3, arg2, Address(pre(sp, 2 * wordSize)));
stp(arg1, zr, Address(pre(sp, -2 * wordSize)));
ldp(c_rarg1, zr, Address(post(sp, 2 * wordSize)));
ldp(c_rarg3, c_rarg2, Address(post(sp, 2 * wordSize)));
} else {
mov(c_rarg1, arg1);
mov(c_rarg2, arg2);
mov(c_rarg3, arg3);
}
return call_RT(oop_result1, metadata_result, entry, 3);
}
// Implementation of StubFrame
class StubFrame: public StackObj {
private:
StubAssembler* _sasm;
public:
StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments);
void load_argument(int offset_in_words, Register reg);
~StubFrame();
};;
void StubAssembler::prologue(const char* name, bool must_gc_arguments) {
set_info(name, must_gc_arguments);
enter();
}
void StubAssembler::epilogue() {
leave();
ret(lr);
}
#define __ _sasm->
StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments) {
_sasm = sasm;
__ prologue(name, must_gc_arguments);
}
// load parameters that were stored with LIR_Assembler::store_parameter
// Note: offsets for store_parameter and load_argument must match
void StubFrame::load_argument(int offset_in_words, Register reg) {
__ load_parameter(offset_in_words, reg);
}
StubFrame::~StubFrame() {
__ epilogue();
}
#undef __
// Implementation of Runtime1
#define __ sasm->
const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2;
// Stack layout for saving/restoring all the registers needed during a runtime
// call (this includes deoptimization)
// Note: note that users of this frame may well have arguments to some runtime
// while these values are on the stack. These positions neglect those arguments
// but the code in save_live_registers will take the argument count into
// account.
//
enum reg_save_layout {
reg_save_frame_size = 32 /* float */ + 32 /* integer */
};
// Save off registers which might be killed by calls into the runtime.
// Tries to smart of about FP registers. In particular we separate
// saving and describing the FPU registers for deoptimization since we
// have to save the FPU registers twice if we describe them. The
// deopt blob is the only thing which needs to describe FPU registers.
// In all other cases it should be sufficient to simply save their
// current value.
static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs];
static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs];
static int reg_save_size_in_words;
static int frame_size_in_bytes = -1;
static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) {
int frame_size_in_bytes = reg_save_frame_size * BytesPerWord;
sasm->set_frame_size(frame_size_in_bytes / BytesPerWord);
int frame_size_in_slots = frame_size_in_bytes / sizeof(jint);
OopMap* oop_map = new OopMap(frame_size_in_slots, 0);
for (int i = 0; i < FrameMap::nof_cpu_regs; i++) {
Register r = as_Register(i);
if (i <= 18 && i != rscratch1->encoding() && i != rscratch2->encoding()) {
int sp_offset = cpu_reg_save_offsets[i];
oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
r->as_VMReg());
}
}
if (save_fpu_registers) {
for (int i = 0; i < FrameMap::nof_fpu_regs; i++) {
FloatRegister r = as_FloatRegister(i);
{
int sp_offset = fpu_reg_save_offsets[i];
oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset),
r->as_VMReg());
}
}
}
return oop_map;
}
static OopMap* save_live_registers(StubAssembler* sasm,
bool save_fpu_registers = true) {
__ block_comment("save_live_registers");
__ push(RegSet::range(r0, r29), sp); // integer registers except lr & sp
if (save_fpu_registers) {
for (int i = 30; i >= 0; i -= 2)
__ stpd(as_FloatRegister(i), as_FloatRegister(i+1),
Address(__ pre(sp, -2 * wordSize)));
} else {
__ add(sp, sp, -32 * wordSize);
}
return generate_oop_map(sasm, save_fpu_registers);
}
static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) {
if (restore_fpu_registers) {
for (int i = 0; i < 32; i += 2)
__ ldpd(as_FloatRegister(i), as_FloatRegister(i+1),
Address(__ post(sp, 2 * wordSize)));
} else {
__ add(sp, sp, 32 * wordSize);
}
__ pop(RegSet::range(r0, r29), sp);
}
static void restore_live_registers_except_r0(StubAssembler* sasm, bool restore_fpu_registers = true) {
if (restore_fpu_registers) {
for (int i = 0; i < 32; i += 2)
__ ldpd(as_FloatRegister(i), as_FloatRegister(i+1),
Address(__ post(sp, 2 * wordSize)));
} else {
__ add(sp, sp, 32 * wordSize);
}
__ ldp(zr, r1, Address(__ post(sp, 16)));
__ pop(RegSet::range(r2, r29), sp);
}
void Runtime1::initialize_pd() {
int i;
int sp_offset = 0;
// all float registers are saved explicitly
assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here");
for (i = 0; i < FrameMap::nof_fpu_regs; i++) {
fpu_reg_save_offsets[i] = sp_offset;
sp_offset += 2; // SP offsets are in halfwords
}
for (i = 0; i < FrameMap::nof_cpu_regs; i++) {
Register r = as_Register(i);
cpu_reg_save_offsets[i] = sp_offset;
sp_offset += 2; // SP offsets are in halfwords
}
}
// target: the entry point of the method that creates and posts the exception oop
// has_argument: true if the exception needs an argument (passed in rscratch1)
OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) {
// make a frame and preserve the caller's caller-save registers
OopMap* oop_map = save_live_registers(sasm);
int call_offset;
if (!has_argument) {
call_offset = __ call_RT(noreg, noreg, target);
} else {
call_offset = __ call_RT(noreg, noreg, target, rscratch1);
}
OopMapSet* oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, oop_map);
__ should_not_reach_here();
return oop_maps;
}
OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) {
__ block_comment("generate_handle_exception");
// incoming parameters
const Register exception_oop = r0;
const Register exception_pc = r3;
// other registers used in this stub
// Save registers, if required.
OopMapSet* oop_maps = new OopMapSet();
OopMap* oop_map = NULL;
switch (id) {
case forward_exception_id:
// We're handling an exception in the context of a compiled frame.
// The registers have been saved in the standard places. Perform
// an exception lookup in the caller and dispatch to the handler
// if found. Otherwise unwind and dispatch to the callers
// exception handler.
oop_map = generate_oop_map(sasm, 1 /*thread*/);
// load and clear pending exception oop into r0
__ ldr(exception_oop, Address(rthread, Thread::pending_exception_offset()));
__ str(zr, Address(rthread, Thread::pending_exception_offset()));
// load issuing PC (the return address for this stub) into r3
__ ldr(exception_pc, Address(rfp, 1*BytesPerWord));
// make sure that the vm_results are cleared (may be unnecessary)
__ str(zr, Address(rthread, JavaThread::vm_result_offset()));
__ str(zr, Address(rthread, JavaThread::vm_result_2_offset()));
break;
case handle_exception_nofpu_id:
case handle_exception_id:
// At this point all registers MAY be live.
oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id);
break;
case handle_exception_from_callee_id: {
// At this point all registers except exception oop (r0) and
// exception pc (lr) are dead.
const int frame_size = 2 /*fp, return address*/;
oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0);
sasm->set_frame_size(frame_size);
break;
}
default:
__ should_not_reach_here();
break;
}
// verify that only r0 and r3 are valid at this time
__ invalidate_registers(false, true, true, false, true, true);
// verify that r0 contains a valid exception
__ verify_not_null_oop(exception_oop);
#ifdef ASSERT
// check that fields in JavaThread for exception oop and issuing pc are
// empty before writing to them
Label oop_empty;
__ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset()));
__ cbz(rscratch1, oop_empty);
__ stop("exception oop already set");
__ bind(oop_empty);
Label pc_empty;
__ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
__ cbz(rscratch1, pc_empty);
__ stop("exception pc already set");
__ bind(pc_empty);
#endif
// save exception oop and issuing pc into JavaThread
// (exception handler will load it from here)
__ str(exception_oop, Address(rthread, JavaThread::exception_oop_offset()));
__ str(exception_pc, Address(rthread, JavaThread::exception_pc_offset()));
// patch throwing pc into return address (has bci & oop map)
__ str(exception_pc, Address(rfp, 1*BytesPerWord));
// compute the exception handler.
// the exception oop and the throwing pc are read from the fields in JavaThread
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc));
oop_maps->add_gc_map(call_offset, oop_map);
// r0: handler address
// will be the deopt blob if nmethod was deoptimized while we looked up
// handler regardless of whether handler existed in the nmethod.
// only r0 is valid at this time, all other registers have been destroyed by the runtime call
__ invalidate_registers(false, true, true, true, true, true);
// patch the return address, this stub will directly return to the exception handler
__ str(r0, Address(rfp, 1*BytesPerWord));
switch (id) {
case forward_exception_id:
case handle_exception_nofpu_id:
case handle_exception_id:
// Restore the registers that were saved at the beginning.
restore_live_registers(sasm, id != handle_exception_nofpu_id);
break;
case handle_exception_from_callee_id:
// Pop the return address.
__ leave();
__ ret(lr); // jump to exception handler
break;
default: ShouldNotReachHere();
}
return oop_maps;
}
void Runtime1::generate_unwind_exception(StubAssembler *sasm) {
// incoming parameters
const Register exception_oop = r0;
// callee-saved copy of exception_oop during runtime call
const Register exception_oop_callee_saved = r19;
// other registers used in this stub
const Register exception_pc = r3;
const Register handler_addr = r1;
// verify that only r0, is valid at this time
__ invalidate_registers(false, true, true, true, true, true);
#ifdef ASSERT
// check that fields in JavaThread for exception oop and issuing pc are empty
Label oop_empty;
__ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset()));
__ cbz(rscratch1, oop_empty);
__ stop("exception oop must be empty");
__ bind(oop_empty);
Label pc_empty;
__ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
__ cbz(rscratch1, pc_empty);
__ stop("exception pc must be empty");
__ bind(pc_empty);
#endif
// Save our return address because
// exception_handler_for_return_address will destroy it. We also
// save exception_oop
__ stp(lr, exception_oop, Address(__ pre(sp, -2 * wordSize)));
// search the exception handler address of the caller (using the return address)
__ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rthread, lr);
// r0: exception handler address of the caller
// Only R0 is valid at this time; all other registers have been
// destroyed by the call.
__ invalidate_registers(false, true, true, true, false, true);
// move result of call into correct register
__ mov(handler_addr, r0);
// get throwing pc (= return address).
// lr has been destroyed by the call
__ ldp(lr, exception_oop, Address(__ post(sp, 2 * wordSize)));
__ mov(r3, lr);
__ verify_not_null_oop(exception_oop);
// continue at exception handler (return address removed)
// note: do *not* remove arguments when unwinding the
// activation since the caller assumes having
// all arguments on the stack when entering the
// runtime to determine the exception handler
// (GC happens at call site with arguments!)
// r0: exception oop
// r3: throwing pc
// r1: exception handler
__ br(handler_addr);
}
OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) {
// use the maximum number of runtime-arguments here because it is difficult to
// distinguish each RT-Call.
// Note: This number affects also the RT-Call in generate_handle_exception because
// the oop-map is shared for all calls.
DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
assert(deopt_blob != NULL, "deoptimization blob must have been created");
OopMap* oop_map = save_live_registers(sasm);
__ mov(c_rarg0, rthread);
Label retaddr;
__ set_last_Java_frame(sp, rfp, retaddr, rscratch1);
// do the call
__ lea(rscratch1, RuntimeAddress(target));
__ blrt(rscratch1, 1, 0, 1);
__ bind(retaddr);
OopMapSet* oop_maps = new OopMapSet();
oop_maps->add_gc_map(__ offset(), oop_map);
// verify callee-saved register
#ifdef ASSERT
{ Label L;
__ get_thread(rscratch1);
__ cmp(rthread, rscratch1);
__ br(Assembler::EQ, L);
__ stop("StubAssembler::call_RT: rthread not callee saved?");
__ bind(L);
}
#endif
__ reset_last_Java_frame(true);
__ maybe_isb();
// check for pending exceptions
{ Label L;
__ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
__ cbz(rscratch1, L);
// exception pending => remove activation and forward to exception handler
{ Label L1;
__ cbnz(r0, L1); // have we deoptimized?
__ far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id)));
__ bind(L1);
}
// the deopt blob expects exceptions in the special fields of
// JavaThread, so copy and clear pending exception.
// load and clear pending exception
__ ldr(r0, Address(rthread, Thread::pending_exception_offset()));
__ str(zr, Address(rthread, Thread::pending_exception_offset()));
// check that there is really a valid exception
__ verify_not_null_oop(r0);
// load throwing pc: this is the return address of the stub
__ mov(r3, lr);
#ifdef ASSERT
// check that fields in JavaThread for exception oop and issuing pc are empty
Label oop_empty;
__ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
__ cbz(rscratch1, oop_empty);
__ stop("exception oop must be empty");
__ bind(oop_empty);
Label pc_empty;
__ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset()));
__ cbz(rscratch1, pc_empty);
__ stop("exception pc must be empty");
__ bind(pc_empty);
#endif
// store exception oop and throwing pc to JavaThread
__ str(r0, Address(rthread, JavaThread::exception_oop_offset()));
__ str(r3, Address(rthread, JavaThread::exception_pc_offset()));
restore_live_registers(sasm);
__ leave();
// Forward the exception directly to deopt blob. We can blow no
// registers and must leave throwing pc on the stack. A patch may
// have values live in registers so the entry point with the
// exception in tls.
__ far_jump(RuntimeAddress(deopt_blob->unpack_with_exception_in_tls()));
__ bind(L);
}
// Runtime will return true if the nmethod has been deoptimized during
// the patching process. In that case we must do a deopt reexecute instead.
Label reexecuteEntry, cont;
__ cbz(r0, cont); // have we deoptimized?
// Will reexecute. Proper return address is already on the stack we just restore
// registers, pop all of our frame but the return address and jump to the deopt blob
restore_live_registers(sasm);
__ leave();
__ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
__ bind(cont);
restore_live_registers(sasm);
__ leave();
__ ret(lr);
return oop_maps;
}
OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) {
const Register exception_oop = r0;
const Register exception_pc = r3;
// for better readability
const bool must_gc_arguments = true;
const bool dont_gc_arguments = false;
// default value; overwritten for some optimized stubs that are called from methods that do not use the fpu
bool save_fpu_registers = true;
// stub code & info for the different stubs
OopMapSet* oop_maps = NULL;
OopMap* oop_map = NULL;
switch (id) {
{
case forward_exception_id:
{
oop_maps = generate_handle_exception(id, sasm);
__ leave();
__ ret(lr);
}
break;
case throw_div0_exception_id:
{ StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments);
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false);
}
break;
case throw_null_pointer_exception_id:
{ StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments);
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false);
}
break;
case new_instance_id:
case fast_new_instance_id:
case fast_new_instance_init_check_id:
{
Register klass = r3; // Incoming
Register obj = r0; // Result
if (id == new_instance_id) {
__ set_info("new_instance", dont_gc_arguments);
} else if (id == fast_new_instance_id) {
__ set_info("fast new_instance", dont_gc_arguments);
} else {
assert(id == fast_new_instance_init_check_id, "bad StubID");
__ set_info("fast new_instance init check", dont_gc_arguments);
}
if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) &&
UseTLAB && Universe::heap()->supports_inline_contig_alloc()) {
Label slow_path;
Register obj_size = r2;
Register t1 = r19;
Register t2 = r4;
assert_different_registers(klass, obj, obj_size, t1, t2);
__ stp(r19, zr, Address(__ pre(sp, -2 * wordSize)));
if (id == fast_new_instance_init_check_id) {
// make sure the klass is initialized
__ ldrb(rscratch1, Address(klass, InstanceKlass::init_state_offset()));
__ cmpw(rscratch1, InstanceKlass::fully_initialized);
__ br(Assembler::NE, slow_path);
}
#ifdef ASSERT
// assert object can be fast path allocated
{
Label ok, not_ok;
__ ldrw(obj_size, Address(klass, Klass::layout_helper_offset()));
__ cmp(obj_size, 0u);
__ br(Assembler::LE, not_ok); // make sure it's an instance (LH > 0)
__ tstw(obj_size, Klass::_lh_instance_slow_path_bit);
__ br(Assembler::EQ, ok);
__ bind(not_ok);
__ stop("assert(can be fast path allocated)");
__ should_not_reach_here();
__ bind(ok);
}
#endif // ASSERT
// get the instance size (size is postive so movl is fine for 64bit)
__ ldrw(obj_size, Address(klass, Klass::layout_helper_offset()));
__ eden_allocate(obj, obj_size, 0, t1, slow_path);
__ incr_allocated_bytes(rthread, obj_size, 0, rscratch1);
__ initialize_object(obj, klass, obj_size, 0, t1, t2, /* is_tlab_allocated */ false);
__ verify_oop(obj);
__ ldp(r19, zr, Address(__ post(sp, 2 * wordSize)));
__ ret(lr);
__ bind(slow_path);
__ ldp(r19, zr, Address(__ post(sp, 2 * wordSize)));
}
__ enter();
OopMap* map = save_live_registers(sasm);
int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass);
oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, map);
restore_live_registers_except_r0(sasm);
__ verify_oop(obj);
__ leave();
__ ret(lr);
// r0,: new instance
}
break;
case counter_overflow_id:
{
Register bci = r0, method = r1;
__ enter();
OopMap* map = save_live_registers(sasm);
// Retrieve bci
__ ldrw(bci, Address(rfp, 2*BytesPerWord));
// And a pointer to the Method*
__ ldr(method, Address(rfp, 3*BytesPerWord));
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method);
oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, map);
restore_live_registers(sasm);
__ leave();
__ ret(lr);
}
break;
case new_type_array_id:
case new_object_array_id:
{
Register length = r19; // Incoming
Register klass = r3; // Incoming
Register obj = r0; // Result
if (id == new_type_array_id) {
__ set_info("new_type_array", dont_gc_arguments);
} else {
__ set_info("new_object_array", dont_gc_arguments);
}
#ifdef ASSERT
// assert object type is really an array of the proper kind
{
Label ok;
Register t0 = obj;
__ ldrw(t0, Address(klass, Klass::layout_helper_offset()));
__ asrw(t0, t0, Klass::_lh_array_tag_shift);
int tag = ((id == new_type_array_id)
? Klass::_lh_array_tag_type_value
: Klass::_lh_array_tag_obj_value);
__ mov(rscratch1, tag);
__ cmpw(t0, rscratch1);
__ br(Assembler::EQ, ok);
__ stop("assert(is an array klass)");
__ should_not_reach_here();
__ bind(ok);
}
#endif // ASSERT
if (UseTLAB && Universe::heap()->supports_inline_contig_alloc()) {
Register arr_size = r4;
Register t1 = r2;
Register t2 = r5;
Label slow_path;
assert_different_registers(length, klass, obj, arr_size, t1, t2);
// check that array length is small enough for fast path.
__ mov(rscratch1, C1_MacroAssembler::max_array_allocation_length);
__ cmpw(length, rscratch1);
__ br(Assembler::HI, slow_path);
// get the allocation size: round_up(hdr + length << (layout_helper & 0x1F))
// since size is positive ldrw does right thing on 64bit
__ ldrw(t1, Address(klass, Klass::layout_helper_offset()));
// since size is positive movw does right thing on 64bit
__ movw(arr_size, length);
__ lslvw(arr_size, length, t1);
__ ubfx(t1, t1, Klass::_lh_header_size_shift,
exact_log2(Klass::_lh_header_size_mask + 1));
__ add(arr_size, arr_size, t1);
__ add(arr_size, arr_size, MinObjAlignmentInBytesMask); // align up
__ andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask);
__ eden_allocate(obj, arr_size, 0, t1, slow_path); // preserves arr_size
__ incr_allocated_bytes(rthread, arr_size, 0, rscratch1);
__ initialize_header(obj, klass, length, t1, t2);
__ ldrb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte)));
assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise");
assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise");
__ andr(t1, t1, Klass::_lh_header_size_mask);
__ sub(arr_size, arr_size, t1); // body length
__ add(t1, t1, obj); // body start
__ initialize_body(t1, arr_size, 0, t2);
__ verify_oop(obj);
__ ret(lr);
__ bind(slow_path);
}
__ enter();
OopMap* map = save_live_registers(sasm);
int call_offset;
if (id == new_type_array_id) {
call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length);
} else {
call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length);
}
oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, map);
restore_live_registers_except_r0(sasm);
__ verify_oop(obj);
__ leave();
__ ret(lr);
// r0: new array
}
break;
case new_multi_array_id:
{ StubFrame f(sasm, "new_multi_array", dont_gc_arguments);
// r0,: klass
// r19,: rank
// r2: address of 1st dimension
OopMap* map = save_live_registers(sasm);
__ mov(c_rarg1, r0);
__ mov(c_rarg3, r2);
__ mov(c_rarg2, r19);
int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, new_multi_array), r1, r2, r3);
oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, map);
restore_live_registers_except_r0(sasm);
// r0,: new multi array
__ verify_oop(r0);
}
break;
case register_finalizer_id:
{
__ set_info("register_finalizer", dont_gc_arguments);
// This is called via call_runtime so the arguments
// will be place in C abi locations
__ verify_oop(c_rarg0);
// load the klass and check the has finalizer flag
Label register_finalizer;
Register t = r5;
__ load_klass(t, r0);
__ ldrw(t, Address(t, Klass::access_flags_offset()));
__ tbnz(t, exact_log2(JVM_ACC_HAS_FINALIZER), register_finalizer);
__ ret(lr);
__ bind(register_finalizer);
__ enter();
OopMap* oop_map = save_live_registers(sasm);
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), r0);
oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, oop_map);
// Now restore all the live registers
restore_live_registers(sasm);
__ leave();
__ ret(lr);
}
break;
case throw_class_cast_exception_id:
{ StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments);
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true);
}
break;
case throw_incompatible_class_change_error_id:
{ StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments);
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false);
}
break;
case slow_subtype_check_id:
{
// Typical calling sequence:
// __ push(klass_RInfo); // object klass or other subclass
// __ push(sup_k_RInfo); // array element klass or other superclass
// __ bl(slow_subtype_check);
// Note that the subclass is pushed first, and is therefore deepest.
enum layout {
r0_off, r0_off_hi,
r2_off, r2_off_hi,
r4_off, r4_off_hi,
r5_off, r5_off_hi,
sup_k_off, sup_k_off_hi,
klass_off, klass_off_hi,
framesize,
result_off = sup_k_off
};
__ set_info("slow_subtype_check", dont_gc_arguments);
__ push(RegSet::of(r0, r2, r4, r5), sp);
// This is called by pushing args and not with C abi
// __ ldr(r4, Address(sp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass
// __ ldr(r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass
__ ldp(r4, r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size));
Label miss;
__ check_klass_subtype_slow_path(r4, r0, r2, r5, NULL, &miss);
// fallthrough on success:
__ mov(rscratch1, 1);
__ str(rscratch1, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result
__ pop(RegSet::of(r0, r2, r4, r5), sp);
__ ret(lr);
__ bind(miss);
__ str(zr, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result
__ pop(RegSet::of(r0, r2, r4, r5), sp);
__ ret(lr);
}
break;
case monitorenter_nofpu_id:
save_fpu_registers = false;
// fall through
case monitorenter_id:
{
StubFrame f(sasm, "monitorenter", dont_gc_arguments);
OopMap* map = save_live_registers(sasm, save_fpu_registers);
// Called with store_parameter and not C abi
f.load_argument(1, r0); // r0,: object
f.load_argument(0, r1); // r1,: lock address
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), r0, r1);
oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, map);
restore_live_registers(sasm, save_fpu_registers);
}
break;
case monitorexit_nofpu_id:
save_fpu_registers = false;
// fall through
case monitorexit_id:
{
StubFrame f(sasm, "monitorexit", dont_gc_arguments);
OopMap* map = save_live_registers(sasm, save_fpu_registers);
// Called with store_parameter and not C abi
f.load_argument(0, r0); // r0,: lock address
// note: really a leaf routine but must setup last java sp
// => use call_RT for now (speed can be improved by
// doing last java sp setup manually)
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), r0);
oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, map);
restore_live_registers(sasm, save_fpu_registers);
}
break;
case deoptimize_id:
{
StubFrame f(sasm, "deoptimize", dont_gc_arguments);
OopMap* oop_map = save_live_registers(sasm);
f.load_argument(0, c_rarg1);
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), c_rarg1);
oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, oop_map);
restore_live_registers(sasm);
DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
assert(deopt_blob != NULL, "deoptimization blob must have been created");
__ leave();
__ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
}
break;
case throw_range_check_failed_id:
{ StubFrame f(sasm, "range_check_failed", dont_gc_arguments);
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true);
}
break;
case unwind_exception_id:
{ __ set_info("unwind_exception", dont_gc_arguments);
// note: no stubframe since we are about to leave the current
// activation and we are calling a leaf VM function only.
generate_unwind_exception(sasm);
}
break;
case access_field_patching_id:
{ StubFrame f(sasm, "access_field_patching", dont_gc_arguments);
// we should set up register map
oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching));
}
break;
case load_klass_patching_id:
{ StubFrame f(sasm, "load_klass_patching", dont_gc_arguments);
// we should set up register map
oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching));
}
break;
case load_mirror_patching_id:
{ StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments);
// we should set up register map
oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching));
}
break;
case load_appendix_patching_id:
{ StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments);
// we should set up register map
oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching));
}
break;
case handle_exception_nofpu_id:
case handle_exception_id:
{ StubFrame f(sasm, "handle_exception", dont_gc_arguments);
oop_maps = generate_handle_exception(id, sasm);
}
break;
case handle_exception_from_callee_id:
{ StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments);
oop_maps = generate_handle_exception(id, sasm);
}
break;
case throw_index_exception_id:
{ StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments);
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true);
}
break;
case throw_array_store_exception_id:
{ StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments);
// tos + 0: link
// + 1: return address
oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true);
}
break;
case predicate_failed_trap_id:
{
StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments);
OopMap* map = save_live_registers(sasm);
int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap));
oop_maps = new OopMapSet();
oop_maps->add_gc_map(call_offset, map);
restore_live_registers(sasm);
__ leave();
DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob();
assert(deopt_blob != NULL, "deoptimization blob must have been created");
__ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution()));
}
break;
default:
{ StubFrame f(sasm, "unimplemented entry", dont_gc_arguments);
__ mov(r0, (int)id);
__ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0);
__ should_not_reach_here();
}
break;
}
}
return oop_maps;
}
#undef __
const char *Runtime1::pd_name_for_address(address entry) { Unimplemented(); return 0; }