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Diffstat (limited to 'compiler/debug/dwarf/expression.h')
-rw-r--r-- | compiler/debug/dwarf/expression.h | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/compiler/debug/dwarf/expression.h b/compiler/debug/dwarf/expression.h deleted file mode 100644 index fafc0462d6..0000000000 --- a/compiler/debug/dwarf/expression.h +++ /dev/null @@ -1,121 +0,0 @@ -/* - * Copyright (C) 2016 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#ifndef ART_COMPILER_DEBUG_DWARF_EXPRESSION_H_ -#define ART_COMPILER_DEBUG_DWARF_EXPRESSION_H_ - -#include <cstddef> -#include <cstdint> - -#include "debug/dwarf/dwarf_constants.h" -#include "debug/dwarf/writer.h" - -namespace art { -namespace dwarf { - -// Writer for DWARF expressions which are used in .debug_info and .debug_loc sections. -// See the DWARF specification for the precise meaning of the opcodes. -// If multiple equivalent encodings are possible, it will choose the most compact one. -// The writer is not exhaustive - it only implements opcodes we have needed so far. -class Expression : private Writer<> { - public: - using Writer<>::data; - using Writer<>::size; - - // Push signed integer on the stack. - void WriteOpConsts(int32_t value) { - if (0 <= value && value < 32) { - PushUint8(DW_OP_lit0 + value); - } else { - PushUint8(DW_OP_consts); - PushSleb128(value); - } - } - - // Push unsigned integer on the stack. - void WriteOpConstu(uint32_t value) { - if (value < 32) { - PushUint8(DW_OP_lit0 + value); - } else { - PushUint8(DW_OP_constu); - PushUleb128(value); - } - } - - // Variable is stored in given register. - void WriteOpReg(uint32_t dwarf_reg_num) { - if (dwarf_reg_num < 32) { - PushUint8(DW_OP_reg0 + dwarf_reg_num); - } else { - PushUint8(DW_OP_regx); - PushUleb128(dwarf_reg_num); - } - } - - // Variable is stored on stack. Also see DW_AT_frame_base. - void WriteOpFbreg(int32_t stack_offset) { - PushUint8(DW_OP_fbreg); - PushSleb128(stack_offset); - } - - // The variable is stored in multiple locations (pieces). - void WriteOpPiece(uint32_t num_bytes) { - PushUint8(DW_OP_piece); - PushUleb128(num_bytes); - } - - // Loads 32-bit or 64-bit value depending on architecture. - void WriteOpDeref() { PushUint8(DW_OP_deref); } - - // Loads value of given byte size. - void WriteOpDerefSize(uint8_t num_bytes) { - PushUint8(DW_OP_deref_size); - PushUint8(num_bytes); - } - - // Pop two values and push their sum. - void WriteOpPlus() { PushUint8(DW_OP_plus); } - - // Add constant value to value on top of stack. - void WriteOpPlusUconst(uint32_t offset) { - PushUint8(DW_OP_plus_uconst); - PushUleb128(offset); - } - - // Negate top of stack. - void WriteOpNeg() { PushUint8(DW_OP_neg); } - - // Pop two values and push their bitwise-AND. - void WriteOpAnd() { PushUint8(DW_OP_and); } - - // Push stack base pointer as determined from .debug_frame. - void WriteOpCallFrameCfa() { PushUint8(DW_OP_call_frame_cfa); } - - // Push address of the variable we are working with. - void WriteOpPushObjectAddress() { PushUint8(DW_OP_push_object_address); } - - // Return the top stack as the value of the variable. - // Otherwise, the top of stack is the variable's location. - void WriteOpStackValue() { PushUint8(DW_OP_stack_value); } - - explicit Expression(std::vector<uint8_t>* buffer) : Writer<>(buffer) { - buffer->clear(); - } -}; -} // namespace dwarf -} // namespace art - -#endif // ART_COMPILER_DEBUG_DWARF_EXPRESSION_H_ |