| // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #include "vm/globals.h" // Needed here to get TARGET_ARCH_ARM. |
| #if defined(TARGET_ARCH_ARM) |
| |
| #include "vm/code_patcher.h" |
| |
| #include "vm/instructions.h" |
| #include "vm/object.h" |
| |
| namespace dart { |
| |
| CodePtr CodePatcher::GetStaticCallTargetAt(uword return_address, |
| const Code& code) { |
| ASSERT(code.ContainsInstructionAt(return_address)); |
| CallPattern call(return_address, code); |
| return call.TargetCode(); |
| } |
| |
| void CodePatcher::PatchStaticCallAt(uword return_address, |
| const Code& code, |
| const Code& new_target) { |
| ASSERT(code.ContainsInstructionAt(return_address)); |
| CallPattern call(return_address, code); |
| call.SetTargetCode(new_target); |
| } |
| |
| void CodePatcher::InsertDeoptimizationCallAt(uword start) { |
| UNREACHABLE(); |
| } |
| |
| CodePtr CodePatcher::GetInstanceCallAt(uword return_address, |
| const Code& caller_code, |
| Object* data) { |
| ASSERT(caller_code.ContainsInstructionAt(return_address)); |
| ICCallPattern call(return_address, caller_code); |
| if (data != NULL) { |
| *data = call.Data(); |
| } |
| return call.TargetCode(); |
| } |
| |
| void CodePatcher::PatchInstanceCallAt(uword return_address, |
| const Code& caller_code, |
| const Object& data, |
| const Code& target) { |
| auto thread = Thread::Current(); |
| thread->isolate_group()->RunWithStoppedMutators([&]() { |
| PatchInstanceCallAtWithMutatorsStopped(thread, return_address, caller_code, |
| data, target); |
| }); |
| } |
| |
| void CodePatcher::PatchInstanceCallAtWithMutatorsStopped( |
| Thread* thread, |
| uword return_address, |
| const Code& caller_code, |
| const Object& data, |
| const Code& target) { |
| ASSERT(caller_code.ContainsInstructionAt(return_address)); |
| ICCallPattern call(return_address, caller_code); |
| call.SetData(data); |
| call.SetTargetCode(target); |
| } |
| |
| FunctionPtr CodePatcher::GetUnoptimizedStaticCallAt(uword return_address, |
| const Code& caller_code, |
| ICData* ic_data_result) { |
| ASSERT(caller_code.ContainsInstructionAt(return_address)); |
| ICCallPattern static_call(return_address, caller_code); |
| ICData& ic_data = ICData::Handle(); |
| ic_data ^= static_call.Data(); |
| if (ic_data_result != NULL) { |
| *ic_data_result = ic_data.ptr(); |
| } |
| return ic_data.GetTargetAt(0); |
| } |
| |
| void CodePatcher::PatchSwitchableCallAt(uword return_address, |
| const Code& caller_code, |
| const Object& data, |
| const Code& target) { |
| auto thread = Thread::Current(); |
| // Ensure all threads are suspended as we update data and target pair. |
| thread->isolate_group()->RunWithStoppedMutators([&]() { |
| PatchSwitchableCallAtWithMutatorsStopped(thread, return_address, |
| caller_code, data, target); |
| }); |
| } |
| |
| void CodePatcher::PatchSwitchableCallAtWithMutatorsStopped( |
| Thread* thread, |
| uword return_address, |
| const Code& caller_code, |
| const Object& data, |
| const Code& target) { |
| if (FLAG_precompiled_mode && FLAG_use_bare_instructions) { |
| BareSwitchableCallPattern call(return_address); |
| call.SetData(data); |
| call.SetTarget(target); |
| } else { |
| SwitchableCallPattern call(return_address, caller_code); |
| call.SetData(data); |
| call.SetTarget(target); |
| } |
| } |
| |
| uword CodePatcher::GetSwitchableCallTargetEntryAt(uword return_address, |
| const Code& caller_code) { |
| if (FLAG_precompiled_mode && FLAG_use_bare_instructions) { |
| BareSwitchableCallPattern call(return_address); |
| return call.target_entry(); |
| } else { |
| SwitchableCallPattern call(return_address, caller_code); |
| return call.target_entry(); |
| } |
| } |
| |
| ObjectPtr CodePatcher::GetSwitchableCallDataAt(uword return_address, |
| const Code& caller_code) { |
| if (FLAG_precompiled_mode && FLAG_use_bare_instructions) { |
| BareSwitchableCallPattern call(return_address); |
| return call.data(); |
| } else { |
| SwitchableCallPattern call(return_address, caller_code); |
| return call.data(); |
| } |
| } |
| |
| void CodePatcher::PatchNativeCallAt(uword return_address, |
| const Code& code, |
| NativeFunction target, |
| const Code& trampoline) { |
| Thread::Current()->isolate_group()->RunWithStoppedMutators([&]() { |
| ASSERT(code.ContainsInstructionAt(return_address)); |
| NativeCallPattern call(return_address, code); |
| call.set_target(trampoline); |
| call.set_native_function(target); |
| }); |
| } |
| |
| CodePtr CodePatcher::GetNativeCallAt(uword return_address, |
| const Code& code, |
| NativeFunction* target) { |
| ASSERT(code.ContainsInstructionAt(return_address)); |
| NativeCallPattern call(return_address, code); |
| *target = call.native_function(); |
| return call.target(); |
| } |
| |
| } // namespace dart |
| |
| #endif // defined TARGET_ARCH_ARM |