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src/cpu/arm/vm/interp_masm_arm.cpp
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rev 12692 : 8176100: [REDO][REDO] G1 Needs pre barrier on dereference of weak JNI handles
Reviewed-by:
@@ -1,7 +1,7 @@
/*
- * Copyright (c) 2008, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2017, 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.
@@ -474,189 +474,10 @@
}
#endif // AARCH64
}
//////////////////////////////////////////////////////////////////////////////////
-#if INCLUDE_ALL_GCS
-
-// G1 pre-barrier.
-// Blows all volatile registers (R0-R3 on 32-bit ARM, R0-R18 on AArch64, Rtemp, LR).
-// If store_addr != noreg, then previous value is loaded from [store_addr];
-// in such case store_addr and new_val registers are preserved;
-// otherwise pre_val register is preserved.
-void InterpreterMacroAssembler::g1_write_barrier_pre(Register store_addr,
- Register new_val,
- Register pre_val,
- Register tmp1,
- Register tmp2) {
- Label done;
- Label runtime;
-
- if (store_addr != noreg) {
- assert_different_registers(store_addr, new_val, pre_val, tmp1, tmp2, noreg);
- } else {
- assert (new_val == noreg, "should be");
- assert_different_registers(pre_val, tmp1, tmp2, noreg);
- }
-
- Address in_progress(Rthread, in_bytes(JavaThread::satb_mark_queue_offset() +
- SATBMarkQueue::byte_offset_of_active()));
- Address index(Rthread, in_bytes(JavaThread::satb_mark_queue_offset() +
- SATBMarkQueue::byte_offset_of_index()));
- Address buffer(Rthread, in_bytes(JavaThread::satb_mark_queue_offset() +
- SATBMarkQueue::byte_offset_of_buf()));
-
- // Is marking active?
- assert(in_bytes(SATBMarkQueue::byte_width_of_active()) == 1, "adjust this code");
- ldrb(tmp1, in_progress);
- cbz(tmp1, done);
-
- // Do we need to load the previous value?
- if (store_addr != noreg) {
- load_heap_oop(pre_val, Address(store_addr, 0));
- }
-
- // Is the previous value null?
- cbz(pre_val, done);
-
- // Can we store original value in the thread's buffer?
- // Is index == 0?
- // (The index field is typed as size_t.)
-
- ldr(tmp1, index); // tmp1 := *index_adr
- ldr(tmp2, buffer);
-
- subs(tmp1, tmp1, wordSize); // tmp1 := tmp1 - wordSize
- b(runtime, lt); // If negative, goto runtime
-
- str(tmp1, index); // *index_adr := tmp1
-
- // Record the previous value
- str(pre_val, Address(tmp2, tmp1));
- b(done);
-
- bind(runtime);
-
- // save the live input values
-#ifdef AARCH64
- if (store_addr != noreg) {
- raw_push(store_addr, new_val);
- } else {
- raw_push(pre_val, ZR);
- }
-#else
- if (store_addr != noreg) {
- // avoid raw_push to support any ordering of store_addr and new_val
- push(RegisterSet(store_addr) | RegisterSet(new_val));
- } else {
- push(pre_val);
- }
-#endif // AARCH64
-
- if (pre_val != R0) {
- mov(R0, pre_val);
- }
- mov(R1, Rthread);
-
- call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_pre), R0, R1);
-
-#ifdef AARCH64
- if (store_addr != noreg) {
- raw_pop(store_addr, new_val);
- } else {
- raw_pop(pre_val, ZR);
- }
-#else
- if (store_addr != noreg) {
- pop(RegisterSet(store_addr) | RegisterSet(new_val));
- } else {
- pop(pre_val);
- }
-#endif // AARCH64
-
- bind(done);
-}
-
-// G1 post-barrier.
-// Blows all volatile registers (R0-R3 on 32-bit ARM, R0-R18 on AArch64, Rtemp, LR).
-void InterpreterMacroAssembler::g1_write_barrier_post(Register store_addr,
- Register new_val,
- Register tmp1,
- Register tmp2,
- Register tmp3) {
-
- Address queue_index(Rthread, in_bytes(JavaThread::dirty_card_queue_offset() +
- DirtyCardQueue::byte_offset_of_index()));
- Address buffer(Rthread, in_bytes(JavaThread::dirty_card_queue_offset() +
- DirtyCardQueue::byte_offset_of_buf()));
-
- BarrierSet* bs = Universe::heap()->barrier_set();
- CardTableModRefBS* ct = (CardTableModRefBS*)bs;
- Label done;
- Label runtime;
-
- // Does store cross heap regions?
-
- eor(tmp1, store_addr, new_val);
-#ifdef AARCH64
- logical_shift_right(tmp1, tmp1, HeapRegion::LogOfHRGrainBytes);
- cbz(tmp1, done);
-#else
- movs(tmp1, AsmOperand(tmp1, lsr, HeapRegion::LogOfHRGrainBytes));
- b(done, eq);
-#endif
-
- // crosses regions, storing NULL?
-
- cbz(new_val, done);
-
- // storing region crossing non-NULL, is card already dirty?
- const Register card_addr = tmp1;
- assert(sizeof(*ct->byte_map_base) == sizeof(jbyte), "adjust this code");
-
- mov_address(tmp2, (address)ct->byte_map_base, symbolic_Relocation::card_table_reference);
- add(card_addr, tmp2, AsmOperand(store_addr, lsr, CardTableModRefBS::card_shift));
-
- ldrb(tmp2, Address(card_addr));
- cmp(tmp2, (int)G1SATBCardTableModRefBS::g1_young_card_val());
- b(done, eq);
-
- membar(MacroAssembler::Membar_mask_bits(MacroAssembler::StoreLoad), tmp2);
-
- assert(CardTableModRefBS::dirty_card_val() == 0, "adjust this code");
- ldrb(tmp2, Address(card_addr));
- cbz(tmp2, done);
-
- // storing a region crossing, non-NULL oop, card is clean.
- // dirty card and log.
-
- strb(zero_register(tmp2), Address(card_addr));
-
- ldr(tmp2, queue_index);
- ldr(tmp3, buffer);
-
- subs(tmp2, tmp2, wordSize);
- b(runtime, lt); // go to runtime if now negative
-
- str(tmp2, queue_index);
-
- str(card_addr, Address(tmp3, tmp2));
- b(done);
-
- bind(runtime);
-
- if (card_addr != R0) {
- mov(R0, card_addr);
- }
- mov(R1, Rthread);
- call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::g1_wb_post), R0, R1);
-
- bind(done);
-}
-
-#endif // INCLUDE_ALL_GCS
-//////////////////////////////////////////////////////////////////////////////////
// Java Expression Stack
void InterpreterMacroAssembler::pop_ptr(Register r) {
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