diff options
Diffstat (limited to 'deps/v8/src/deoptimizer/arm64/deoptimizer-arm64.cc')
| -rw-r--r-- | deps/v8/src/deoptimizer/arm64/deoptimizer-arm64.cc | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/deps/v8/src/deoptimizer/arm64/deoptimizer-arm64.cc b/deps/v8/src/deoptimizer/arm64/deoptimizer-arm64.cc index 82ae764e50..17091259d6 100644 --- a/deps/v8/src/deoptimizer/arm64/deoptimizer-arm64.cc +++ b/deps/v8/src/deoptimizer/arm64/deoptimizer-arm64.cc @@ -189,6 +189,15 @@ void Deoptimizer::GenerateDeoptimizationEntries(MacroAssembler* masm, CopyRegListToFrame(masm, x1, FrameDescription::double_registers_offset(), saved_double_registers, x2, x3, kDoubleRegistersOffset); + // Mark the stack as not iterable for the CPU profiler which won't be able to + // walk the stack without the return address. + { + UseScratchRegisterScope temps(masm); + Register is_iterable = temps.AcquireX(); + __ Mov(is_iterable, ExternalReference::stack_is_iterable_address(isolate)); + __ strb(xzr, MemOperand(is_iterable)); + } + // Remove the saved registers from the stack. DCHECK_EQ(kSavedRegistersAreaSize % kXRegSize, 0); __ Drop(kSavedRegistersAreaSize / kXRegSize); @@ -251,6 +260,15 @@ void Deoptimizer::GenerateDeoptimizationEntries(MacroAssembler* masm, RestoreRegList(masm, saved_double_registers, x1, FrameDescription::double_registers_offset()); + { + UseScratchRegisterScope temps(masm); + Register is_iterable = temps.AcquireX(); + Register one = x4; + __ Mov(is_iterable, ExternalReference::stack_is_iterable_address(isolate)); + __ Mov(one, Operand(1)); + __ strb(one, MemOperand(is_iterable)); + } + // TODO(all): ARM copies a lot (if not all) of the last output frame onto the // stack, then pops it all into registers. Here, we try to load it directly // into the relevant registers. Is this correct? If so, we should improve the |