[liftoff] Force skip write barriers if 'v8_disable_write_barriers' flag is set

Change-Id: I16872f90a10702c3dcc8e556a8bc17fd63a0f858
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2881511Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Wenyu Zhao <wenyu.zhao@anu.edu.au>
Cr-Commit-Position: refs/heads/master@{#74553}

src/wasm/baseline/arm/liftoff-assembler-arm.h

@@ -745,7 +745,7 @@ void LiftoffAssembler::StoreTaggedPointer(Register dst_addr,
                           : MemOperand(dst_addr, actual_offset_reg);
   str(src.gp(), dst_op);
 
-  if (skip_write_barrier) return;
+  if (skip_write_barrier || FLAG_disable_write_barriers) return;
 
   // The write barrier.
   Label write_barrier;

src/wasm/baseline/arm64/liftoff-assembler-arm64.h

@@ -466,7 +466,7 @@ void LiftoffAssembler::StoreTaggedPointer(Register dst_addr,
       liftoff::GetMemOp(this, &temps, dst_addr, offset_reg, offset_imm);
   StoreTaggedField(src.gp(), dst_op);
 
-  if (skip_write_barrier) return;
+  if (skip_write_barrier || FLAG_disable_write_barriers) return;
 
   // The write barrier.
   Label write_barrier;

src/wasm/baseline/ia32/liftoff-assembler-ia32.h

@@ -367,7 +367,7 @@ void LiftoffAssembler::StoreTaggedPointer(Register dst_addr,
                        : Operand(dst_addr, offset_reg, times_1, offset_imm);
   mov(dst_op, src.gp());
 
-  if (skip_write_barrier) return;
+  if (skip_write_barrier || FLAG_disable_write_barriers) return;
 
   Register scratch = pinned.set(GetUnusedRegister(kGpReg, pinned)).gp();
   Label write_barrier;

src/wasm/baseline/mips/liftoff-assembler-mips.h

@@ -470,7 +470,7 @@ void LiftoffAssembler::StoreTaggedPointer(Register dst_addr,
                                              : MemOperand(dst_addr, offset_imm);
   Sw(src.gp(), dst_op);
 
-  if (skip_write_barrier) return;
+  if (skip_write_barrier || FLAG_disable_write_barriers) return;
 
   // The write barrier.
   Label write_barrier;

src/wasm/baseline/mips64/liftoff-assembler-mips64.h

@@ -450,7 +450,7 @@ void LiftoffAssembler::StoreTaggedPointer(Register dst_addr,
   MemOperand dst_op = liftoff::GetMemOp(this, dst_addr, offset_reg, offset_imm);
   Sd(src.gp(), dst_op);
 
-  if (skip_write_barrier) return;
+  if (skip_write_barrier || FLAG_disable_write_barriers) return;
 
   Label write_barrier;
   Label exit;

src/wasm/baseline/riscv64/liftoff-assembler-riscv64.h

@@ -440,7 +440,7 @@ void LiftoffAssembler::StoreTaggedPointer(Register dst_addr,
   MemOperand dst_op = liftoff::GetMemOp(this, dst_addr, offset_reg, offset_imm);
   Sd(src.gp(), dst_op);
 
-  if (skip_write_barrier) return;
+  if (skip_write_barrier || FLAG_disable_write_barriers) return;
 
   Label write_barrier;
   Label exit;

src/wasm/baseline/s390/liftoff-assembler-s390.h

@@ -256,7 +256,7 @@ void LiftoffAssembler::StoreTaggedPointer(Register dst_addr,
       MemOperand(dst_addr, offset_reg == no_reg ? r0 : offset_reg, offset_imm);
   StoreTaggedField(src.gp(), dst_op);
 
-  if (skip_write_barrier) return;
+  if (skip_write_barrier || FLAG_disable_write_barriers) return;
 
   Label write_barrier;
   Label exit;

src/wasm/baseline/x64/liftoff-assembler-x64.h

@@ -363,7 +363,7 @@ void LiftoffAssembler::StoreTaggedPointer(Register dst_addr,
                                      static_cast<uint32_t>(offset_imm));
   StoreTaggedField(dst_op, src.gp());
 
-  if (skip_write_barrier) return;
+  if (skip_write_barrier || FLAG_disable_write_barriers) return;
 
   Register scratch = pinned.set(GetUnusedRegister(kGpReg, pinned)).gp();
   Label write_barrier;