| /* |
| * Copyright (c) 2004, 2017, 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/macroAssembler.hpp" |
| #include "memory/resourceArea.hpp" |
| #include "prims/jniFastGetField.hpp" |
| #include "prims/jvm_misc.hpp" |
| #include "runtime/safepoint.hpp" |
| |
| #define __ masm-> |
| |
| #define BUFFER_SIZE 30*wordSize |
| |
| // Instead of issuing a LoadLoad barrier we create an address |
| // dependency between loads; this might be more efficient. |
| |
| // Common register usage: |
| // r0/v0: result |
| // c_rarg0: jni env |
| // c_rarg1: obj |
| // c_rarg2: jfield id |
| |
| static const Register robj = r3; |
| static const Register rcounter = r4; |
| static const Register roffset = r5; |
| static const Register rcounter_addr = r6; |
| static const Register result = r7; |
| |
| address JNI_FastGetField::generate_fast_get_int_field0(BasicType type) { |
| const char *name; |
| switch (type) { |
| case T_BOOLEAN: name = "jni_fast_GetBooleanField"; break; |
| case T_BYTE: name = "jni_fast_GetByteField"; break; |
| case T_CHAR: name = "jni_fast_GetCharField"; break; |
| case T_SHORT: name = "jni_fast_GetShortField"; break; |
| case T_INT: name = "jni_fast_GetIntField"; break; |
| case T_LONG: name = "jni_fast_GetLongField"; break; |
| case T_FLOAT: name = "jni_fast_GetFloatField"; break; |
| case T_DOUBLE: name = "jni_fast_GetDoubleField"; break; |
| default: ShouldNotReachHere(); |
| name = NULL; // unreachable |
| } |
| ResourceMark rm; |
| BufferBlob* blob = BufferBlob::create(name, BUFFER_SIZE); |
| CodeBuffer cbuf(blob); |
| MacroAssembler* masm = new MacroAssembler(&cbuf); |
| address fast_entry = __ pc(); |
| |
| Label slow; |
| |
| unsigned long offset; |
| __ adrp(rcounter_addr, |
| SafepointSynchronize::safepoint_counter_addr(), offset); |
| Address safepoint_counter_addr(rcounter_addr, offset); |
| __ ldrw(rcounter, safepoint_counter_addr); |
| __ tbnz(rcounter, 0, slow); |
| __ eor(robj, c_rarg1, rcounter); |
| __ eor(robj, robj, rcounter); // obj, since |
| // robj ^ rcounter ^ rcounter == robj |
| // robj is address dependent on rcounter. |
| |
| // If mask changes we need to ensure that the inverse is still encodable as an immediate |
| STATIC_ASSERT(JNIHandles::weak_tag_mask == 1); |
| __ andr(robj, robj, ~JNIHandles::weak_tag_mask); |
| |
| __ ldr(robj, Address(robj, 0)); // *obj |
| __ lsr(roffset, c_rarg2, 2); // offset |
| |
| assert(count < LIST_CAPACITY, "LIST_CAPACITY too small"); |
| speculative_load_pclist[count] = __ pc(); // Used by the segfault handler |
| switch (type) { |
| case T_BOOLEAN: __ ldrb (result, Address(robj, roffset)); break; |
| case T_BYTE: __ ldrsb (result, Address(robj, roffset)); break; |
| case T_CHAR: __ ldrh (result, Address(robj, roffset)); break; |
| case T_SHORT: __ ldrsh (result, Address(robj, roffset)); break; |
| case T_FLOAT: __ ldrw (result, Address(robj, roffset)); break; |
| case T_INT: __ ldrsw (result, Address(robj, roffset)); break; |
| case T_DOUBLE: |
| case T_LONG: __ ldr (result, Address(robj, roffset)); break; |
| default: ShouldNotReachHere(); |
| } |
| |
| // counter_addr is address dependent on result. |
| __ eor(rcounter_addr, rcounter_addr, result); |
| __ eor(rcounter_addr, rcounter_addr, result); |
| __ ldrw(rscratch1, safepoint_counter_addr); |
| __ cmpw(rcounter, rscratch1); |
| __ br (Assembler::NE, slow); |
| |
| switch (type) { |
| case T_FLOAT: __ fmovs(v0, result); break; |
| case T_DOUBLE: __ fmovd(v0, result); break; |
| default: __ mov(r0, result); break; |
| } |
| __ ret(lr); |
| |
| slowcase_entry_pclist[count++] = __ pc(); |
| __ bind(slow); |
| address slow_case_addr; |
| switch (type) { |
| case T_BOOLEAN: slow_case_addr = jni_GetBooleanField_addr(); break; |
| case T_BYTE: slow_case_addr = jni_GetByteField_addr(); break; |
| case T_CHAR: slow_case_addr = jni_GetCharField_addr(); break; |
| case T_SHORT: slow_case_addr = jni_GetShortField_addr(); break; |
| case T_INT: slow_case_addr = jni_GetIntField_addr(); break; |
| case T_LONG: slow_case_addr = jni_GetLongField_addr(); break; |
| case T_FLOAT: slow_case_addr = jni_GetFloatField_addr(); break; |
| case T_DOUBLE: slow_case_addr = jni_GetDoubleField_addr(); break; |
| default: ShouldNotReachHere(); |
| slow_case_addr = NULL; // unreachable |
| } |
| |
| { |
| __ enter(); |
| __ lea(rscratch1, ExternalAddress(slow_case_addr)); |
| __ blr(rscratch1); |
| __ maybe_isb(); |
| __ leave(); |
| __ ret(lr); |
| } |
| __ flush (); |
| |
| return fast_entry; |
| } |
| |
| address JNI_FastGetField::generate_fast_get_boolean_field() { |
| return generate_fast_get_int_field0(T_BOOLEAN); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_byte_field() { |
| return generate_fast_get_int_field0(T_BYTE); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_char_field() { |
| return generate_fast_get_int_field0(T_CHAR); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_short_field() { |
| return generate_fast_get_int_field0(T_SHORT); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_int_field() { |
| return generate_fast_get_int_field0(T_INT); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_long_field() { |
| return generate_fast_get_int_field0(T_LONG); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_float_field() { |
| return generate_fast_get_int_field0(T_FLOAT); |
| } |
| |
| address JNI_FastGetField::generate_fast_get_double_field() { |
| return generate_fast_get_int_field0(T_DOUBLE); |
| } |
| |