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-rw-r--r--lib/DebugInfo/DWARFFormValue.cpp557
1 files changed, 0 insertions, 557 deletions
diff --git a/lib/DebugInfo/DWARFFormValue.cpp b/lib/DebugInfo/DWARFFormValue.cpp
deleted file mode 100644
index 69b9771..0000000
--- a/lib/DebugInfo/DWARFFormValue.cpp
+++ /dev/null
@@ -1,557 +0,0 @@
-//===-- DWARFFormValue.cpp ------------------------------------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/DebugInfo/DWARFFormValue.h"
-#include "DWARFCompileUnit.h"
-#include "DWARFContext.h"
-#include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/Dwarf.h"
-#include "llvm/Support/Format.h"
-#include "llvm/Support/raw_ostream.h"
-#include <cassert>
-using namespace llvm;
-using namespace dwarf;
-
-namespace {
-uint8_t getRefAddrSize(uint8_t AddrSize, uint16_t Version) {
- // FIXME: Support DWARF64.
- return (Version == 2) ? AddrSize : 4;
-}
-
-template <uint8_t AddrSize, uint8_t RefAddrSize>
-ArrayRef<uint8_t> makeFixedFormSizesArrayRef() {
- static const uint8_t sizes[] = {
- 0, // 0x00 unused
- AddrSize, // 0x01 DW_FORM_addr
- 0, // 0x02 unused
- 0, // 0x03 DW_FORM_block2
- 0, // 0x04 DW_FORM_block4
- 2, // 0x05 DW_FORM_data2
- 4, // 0x06 DW_FORM_data4
- 8, // 0x07 DW_FORM_data8
- 0, // 0x08 DW_FORM_string
- 0, // 0x09 DW_FORM_block
- 0, // 0x0a DW_FORM_block1
- 1, // 0x0b DW_FORM_data1
- 1, // 0x0c DW_FORM_flag
- 0, // 0x0d DW_FORM_sdata
- 4, // 0x0e DW_FORM_strp
- 0, // 0x0f DW_FORM_udata
- RefAddrSize, // 0x10 DW_FORM_ref_addr
- 1, // 0x11 DW_FORM_ref1
- 2, // 0x12 DW_FORM_ref2
- 4, // 0x13 DW_FORM_ref4
- 8, // 0x14 DW_FORM_ref8
- 0, // 0x15 DW_FORM_ref_udata
- 0, // 0x16 DW_FORM_indirect
- 4, // 0x17 DW_FORM_sec_offset
- 0, // 0x18 DW_FORM_exprloc
- 0, // 0x19 DW_FORM_flag_present
- };
- return makeArrayRef(sizes);
-}
-}
-
-ArrayRef<uint8_t> DWARFFormValue::getFixedFormSizes(uint8_t AddrSize,
- uint16_t Version) {
- uint8_t RefAddrSize = getRefAddrSize(AddrSize, Version);
- if (AddrSize == 4 && RefAddrSize == 4)
- return makeFixedFormSizesArrayRef<4, 4>();
- if (AddrSize == 4 && RefAddrSize == 8)
- return makeFixedFormSizesArrayRef<4, 8>();
- if (AddrSize == 8 && RefAddrSize == 4)
- return makeFixedFormSizesArrayRef<8, 4>();
- if (AddrSize == 8 && RefAddrSize == 8)
- return makeFixedFormSizesArrayRef<8, 8>();
- return None;
-}
-
-static const DWARFFormValue::FormClass DWARF4FormClasses[] = {
- DWARFFormValue::FC_Unknown, // 0x0
- DWARFFormValue::FC_Address, // 0x01 DW_FORM_addr
- DWARFFormValue::FC_Unknown, // 0x02 unused
- DWARFFormValue::FC_Block, // 0x03 DW_FORM_block2
- DWARFFormValue::FC_Block, // 0x04 DW_FORM_block4
- DWARFFormValue::FC_Constant, // 0x05 DW_FORM_data2
- // --- These can be FC_SectionOffset in DWARF3 and below:
- DWARFFormValue::FC_Constant, // 0x06 DW_FORM_data4
- DWARFFormValue::FC_Constant, // 0x07 DW_FORM_data8
- // ---
- DWARFFormValue::FC_String, // 0x08 DW_FORM_string
- DWARFFormValue::FC_Block, // 0x09 DW_FORM_block
- DWARFFormValue::FC_Block, // 0x0a DW_FORM_block1
- DWARFFormValue::FC_Constant, // 0x0b DW_FORM_data1
- DWARFFormValue::FC_Flag, // 0x0c DW_FORM_flag
- DWARFFormValue::FC_Constant, // 0x0d DW_FORM_sdata
- DWARFFormValue::FC_String, // 0x0e DW_FORM_strp
- DWARFFormValue::FC_Constant, // 0x0f DW_FORM_udata
- DWARFFormValue::FC_Reference, // 0x10 DW_FORM_ref_addr
- DWARFFormValue::FC_Reference, // 0x11 DW_FORM_ref1
- DWARFFormValue::FC_Reference, // 0x12 DW_FORM_ref2
- DWARFFormValue::FC_Reference, // 0x13 DW_FORM_ref4
- DWARFFormValue::FC_Reference, // 0x14 DW_FORM_ref8
- DWARFFormValue::FC_Reference, // 0x15 DW_FORM_ref_udata
- DWARFFormValue::FC_Indirect, // 0x16 DW_FORM_indirect
- DWARFFormValue::FC_SectionOffset, // 0x17 DW_FORM_sec_offset
- DWARFFormValue::FC_Exprloc, // 0x18 DW_FORM_exprloc
- DWARFFormValue::FC_Flag, // 0x19 DW_FORM_flag_present
-};
-
-bool DWARFFormValue::isFormClass(DWARFFormValue::FormClass FC) const {
- // First, check DWARF4 form classes.
- if (Form < ArrayRef<FormClass>(DWARF4FormClasses).size() &&
- DWARF4FormClasses[Form] == FC)
- return true;
- // Check DW_FORM_ref_sig8 from DWARF4.
- if (Form == DW_FORM_ref_sig8)
- return (FC == FC_Reference);
- // Check for some DWARF5 forms.
- if (Form == DW_FORM_GNU_addr_index)
- return (FC == FC_Address);
- if (Form == DW_FORM_GNU_str_index)
- return (FC == FC_String);
- // In DWARF3 DW_FORM_data4 and DW_FORM_data8 served also as a section offset.
- // Don't check for DWARF version here, as some producers may still do this
- // by mistake.
- if ((Form == DW_FORM_data4 || Form == DW_FORM_data8) &&
- FC == FC_SectionOffset)
- return true;
- return false;
-}
-
-bool DWARFFormValue::extractValue(DataExtractor data, uint32_t *offset_ptr,
- const DWARFUnit *cu) {
- bool indirect = false;
- bool is_block = false;
- Value.data = nullptr;
- // Read the value for the form into value and follow and DW_FORM_indirect
- // instances we run into
- do {
- indirect = false;
- switch (Form) {
- case DW_FORM_addr:
- case DW_FORM_ref_addr: {
- if (!cu)
- return false;
- uint16_t AddrSize =
- (Form == DW_FORM_addr)
- ? cu->getAddressByteSize()
- : getRefAddrSize(cu->getAddressByteSize(), cu->getVersion());
- RelocAddrMap::const_iterator AI = cu->getRelocMap()->find(*offset_ptr);
- if (AI != cu->getRelocMap()->end()) {
- const std::pair<uint8_t, int64_t> &R = AI->second;
- Value.uval = data.getUnsigned(offset_ptr, AddrSize) + R.second;
- } else
- Value.uval = data.getUnsigned(offset_ptr, AddrSize);
- break;
- }
- case DW_FORM_exprloc:
- case DW_FORM_block:
- Value.uval = data.getULEB128(offset_ptr);
- is_block = true;
- break;
- case DW_FORM_block1:
- Value.uval = data.getU8(offset_ptr);
- is_block = true;
- break;
- case DW_FORM_block2:
- Value.uval = data.getU16(offset_ptr);
- is_block = true;
- break;
- case DW_FORM_block4:
- Value.uval = data.getU32(offset_ptr);
- is_block = true;
- break;
- case DW_FORM_data1:
- case DW_FORM_ref1:
- case DW_FORM_flag:
- Value.uval = data.getU8(offset_ptr);
- break;
- case DW_FORM_data2:
- case DW_FORM_ref2:
- Value.uval = data.getU16(offset_ptr);
- break;
- case DW_FORM_data4:
- case DW_FORM_ref4: {
- Value.uval = data.getU32(offset_ptr);
- if (!cu)
- break;
- RelocAddrMap::const_iterator AI = cu->getRelocMap()->find(*offset_ptr-4);
- if (AI != cu->getRelocMap()->end())
- Value.uval += AI->second.second;
- break;
- }
- case DW_FORM_data8:
- case DW_FORM_ref8:
- Value.uval = data.getU64(offset_ptr);
- break;
- case DW_FORM_sdata:
- Value.sval = data.getSLEB128(offset_ptr);
- break;
- case DW_FORM_strp: {
- Value.uval = data.getU32(offset_ptr);
- if (!cu)
- break;
- RelocAddrMap::const_iterator AI = cu->getRelocMap()->find(*offset_ptr-4);
- if (AI != cu->getRelocMap()->end())
- Value.uval += AI->second.second;
- break;
- }
- case DW_FORM_udata:
- case DW_FORM_ref_udata:
- Value.uval = data.getULEB128(offset_ptr);
- break;
- case DW_FORM_string:
- Value.cstr = data.getCStr(offset_ptr);
- break;
- case DW_FORM_indirect:
- Form = data.getULEB128(offset_ptr);
- indirect = true;
- break;
- case DW_FORM_sec_offset: {
- // FIXME: This is 64-bit for DWARF64.
- Value.uval = data.getU32(offset_ptr);
- if (!cu)
- break;
- RelocAddrMap::const_iterator AI = cu->getRelocMap()->find(*offset_ptr-4);
- if (AI != cu->getRelocMap()->end())
- Value.uval += AI->second.second;
- break;
- }
- case DW_FORM_flag_present:
- Value.uval = 1;
- break;
- case DW_FORM_ref_sig8:
- Value.uval = data.getU64(offset_ptr);
- break;
- case DW_FORM_GNU_addr_index:
- case DW_FORM_GNU_str_index:
- Value.uval = data.getULEB128(offset_ptr);
- break;
- default:
- return false;
- }
- } while (indirect);
-
- if (is_block) {
- StringRef str = data.getData().substr(*offset_ptr, Value.uval);
- Value.data = nullptr;
- if (!str.empty()) {
- Value.data = reinterpret_cast<const uint8_t *>(str.data());
- *offset_ptr += Value.uval;
- }
- }
-
- return true;
-}
-
-bool
-DWARFFormValue::skipValue(DataExtractor debug_info_data, uint32_t* offset_ptr,
- const DWARFUnit *cu) const {
- return DWARFFormValue::skipValue(Form, debug_info_data, offset_ptr, cu);
-}
-
-bool
-DWARFFormValue::skipValue(uint16_t form, DataExtractor debug_info_data,
- uint32_t *offset_ptr, const DWARFUnit *cu) {
- bool indirect = false;
- do {
- switch (form) {
- // Blocks if inlined data that have a length field and the data bytes
- // inlined in the .debug_info
- case DW_FORM_exprloc:
- case DW_FORM_block: {
- uint64_t size = debug_info_data.getULEB128(offset_ptr);
- *offset_ptr += size;
- return true;
- }
- case DW_FORM_block1: {
- uint8_t size = debug_info_data.getU8(offset_ptr);
- *offset_ptr += size;
- return true;
- }
- case DW_FORM_block2: {
- uint16_t size = debug_info_data.getU16(offset_ptr);
- *offset_ptr += size;
- return true;
- }
- case DW_FORM_block4: {
- uint32_t size = debug_info_data.getU32(offset_ptr);
- *offset_ptr += size;
- return true;
- }
-
- // Inlined NULL terminated C-strings
- case DW_FORM_string:
- debug_info_data.getCStr(offset_ptr);
- return true;
-
- // Compile unit address sized values
- case DW_FORM_addr:
- *offset_ptr += cu->getAddressByteSize();
- return true;
- case DW_FORM_ref_addr:
- *offset_ptr += getRefAddrSize(cu->getAddressByteSize(), cu->getVersion());
- return true;
-
- // 0 byte values - implied from the form.
- case DW_FORM_flag_present:
- return true;
-
- // 1 byte values
- case DW_FORM_data1:
- case DW_FORM_flag:
- case DW_FORM_ref1:
- *offset_ptr += 1;
- return true;
-
- // 2 byte values
- case DW_FORM_data2:
- case DW_FORM_ref2:
- *offset_ptr += 2;
- return true;
-
- // 4 byte values
- case DW_FORM_strp:
- case DW_FORM_data4:
- case DW_FORM_ref4:
- *offset_ptr += 4;
- return true;
-
- // 8 byte values
- case DW_FORM_data8:
- case DW_FORM_ref8:
- case DW_FORM_ref_sig8:
- *offset_ptr += 8;
- return true;
-
- // signed or unsigned LEB 128 values
- // case DW_FORM_APPLE_db_str:
- case DW_FORM_sdata:
- case DW_FORM_udata:
- case DW_FORM_ref_udata:
- case DW_FORM_GNU_str_index:
- case DW_FORM_GNU_addr_index:
- debug_info_data.getULEB128(offset_ptr);
- return true;
-
- case DW_FORM_indirect:
- indirect = true;
- form = debug_info_data.getULEB128(offset_ptr);
- break;
-
- // FIXME: 4 for DWARF32, 8 for DWARF64.
- case DW_FORM_sec_offset:
- *offset_ptr += 4;
- return true;
-
- default:
- return false;
- }
- } while (indirect);
- return true;
-}
-
-void
-DWARFFormValue::dump(raw_ostream &OS, const DWARFUnit *cu) const {
- uint64_t uvalue = Value.uval;
- bool cu_relative_offset = false;
-
- switch (Form) {
- case DW_FORM_addr: OS << format("0x%016" PRIx64, uvalue); break;
- case DW_FORM_GNU_addr_index: {
- OS << format(" indexed (%8.8x) address = ", (uint32_t)uvalue);
- uint64_t Address;
- if (cu->getAddrOffsetSectionItem(uvalue, Address))
- OS << format("0x%016" PRIx64, Address);
- else
- OS << "<no .debug_addr section>";
- break;
- }
- case DW_FORM_flag_present: OS << "true"; break;
- case DW_FORM_flag:
- case DW_FORM_data1: OS << format("0x%02x", (uint8_t)uvalue); break;
- case DW_FORM_data2: OS << format("0x%04x", (uint16_t)uvalue); break;
- case DW_FORM_data4: OS << format("0x%08x", (uint32_t)uvalue); break;
- case DW_FORM_ref_sig8:
- case DW_FORM_data8: OS << format("0x%016" PRIx64, uvalue); break;
- case DW_FORM_string:
- OS << '"';
- OS.write_escaped(Value.cstr);
- OS << '"';
- break;
- case DW_FORM_exprloc:
- case DW_FORM_block:
- case DW_FORM_block1:
- case DW_FORM_block2:
- case DW_FORM_block4:
- if (uvalue > 0) {
- switch (Form) {
- case DW_FORM_exprloc:
- case DW_FORM_block: OS << format("<0x%" PRIx64 "> ", uvalue); break;
- case DW_FORM_block1: OS << format("<0x%2.2x> ", (uint8_t)uvalue); break;
- case DW_FORM_block2: OS << format("<0x%4.4x> ", (uint16_t)uvalue); break;
- case DW_FORM_block4: OS << format("<0x%8.8x> ", (uint32_t)uvalue); break;
- default: break;
- }
-
- const uint8_t* data_ptr = Value.data;
- if (data_ptr) {
- // uvalue contains size of block
- const uint8_t* end_data_ptr = data_ptr + uvalue;
- while (data_ptr < end_data_ptr) {
- OS << format("%2.2x ", *data_ptr);
- ++data_ptr;
- }
- }
- else
- OS << "NULL";
- }
- break;
-
- case DW_FORM_sdata: OS << Value.sval; break;
- case DW_FORM_udata: OS << Value.uval; break;
- case DW_FORM_strp: {
- OS << format(" .debug_str[0x%8.8x] = ", (uint32_t)uvalue);
- Optional<const char *> DbgStr = getAsCString(cu);
- if (DbgStr.hasValue()) {
- OS << '"';
- OS.write_escaped(DbgStr.getValue());
- OS << '"';
- }
- break;
- }
- case DW_FORM_GNU_str_index: {
- OS << format(" indexed (%8.8x) string = ", (uint32_t)uvalue);
- Optional<const char *> DbgStr = getAsCString(cu);
- if (DbgStr.hasValue()) {
- OS << '"';
- OS.write_escaped(DbgStr.getValue());
- OS << '"';
- }
- break;
- }
- case DW_FORM_ref_addr:
- OS << format("0x%016" PRIx64, uvalue);
- break;
- case DW_FORM_ref1:
- cu_relative_offset = true;
- OS << format("cu + 0x%2.2x", (uint8_t)uvalue);
- break;
- case DW_FORM_ref2:
- cu_relative_offset = true;
- OS << format("cu + 0x%4.4x", (uint16_t)uvalue);
- break;
- case DW_FORM_ref4:
- cu_relative_offset = true;
- OS << format("cu + 0x%4.4x", (uint32_t)uvalue);
- break;
- case DW_FORM_ref8:
- cu_relative_offset = true;
- OS << format("cu + 0x%8.8" PRIx64, uvalue);
- break;
- case DW_FORM_ref_udata:
- cu_relative_offset = true;
- OS << format("cu + 0x%" PRIx64, uvalue);
- break;
-
- // All DW_FORM_indirect attributes should be resolved prior to calling
- // this function
- case DW_FORM_indirect:
- OS << "DW_FORM_indirect";
- break;
-
- // Should be formatted to 64-bit for DWARF64.
- case DW_FORM_sec_offset:
- OS << format("0x%08x", (uint32_t)uvalue);
- break;
-
- default:
- OS << format("DW_FORM(0x%4.4x)", Form);
- break;
- }
-
- if (cu_relative_offset)
- OS << format(" => {0x%8.8" PRIx64 "}", uvalue + (cu ? cu->getOffset() : 0));
-}
-
-Optional<const char *> DWARFFormValue::getAsCString(const DWARFUnit *U) const {
- if (!isFormClass(FC_String))
- return None;
- if (Form == DW_FORM_string)
- return Value.cstr;
- if (!U)
- return None;
- uint32_t Offset = Value.uval;
- if (Form == DW_FORM_GNU_str_index) {
- uint32_t StrOffset;
- if (!U->getStringOffsetSectionItem(Offset, StrOffset))
- return None;
- Offset = StrOffset;
- }
- if (const char *Str = U->getStringExtractor().getCStr(&Offset)) {
- return Str;
- }
- return None;
-}
-
-Optional<uint64_t> DWARFFormValue::getAsAddress(const DWARFUnit *U) const {
- if (!isFormClass(FC_Address))
- return None;
- if (Form == DW_FORM_GNU_addr_index) {
- uint32_t Index = Value.uval;
- uint64_t Result;
- if (!U || !U->getAddrOffsetSectionItem(Index, Result))
- return None;
- return Result;
- }
- return Value.uval;
-}
-
-Optional<uint64_t> DWARFFormValue::getAsReference(const DWARFUnit *U) const {
- if (!isFormClass(FC_Reference))
- return None;
- switch (Form) {
- case DW_FORM_ref1:
- case DW_FORM_ref2:
- case DW_FORM_ref4:
- case DW_FORM_ref8:
- case DW_FORM_ref_udata:
- if (!U)
- return None;
- return Value.uval + U->getOffset();
- case DW_FORM_ref_addr:
- return Value.uval;
- // FIXME: Add proper support for DW_FORM_ref_sig8
- default:
- return Value.uval;
- }
-}
-
-Optional<uint64_t> DWARFFormValue::getAsSectionOffset() const {
- if (!isFormClass(FC_SectionOffset))
- return None;
- return Value.uval;
-}
-
-Optional<uint64_t> DWARFFormValue::getAsUnsignedConstant() const {
- if ((!isFormClass(FC_Constant) && !isFormClass(FC_Flag))
- || Form == DW_FORM_sdata)
- return None;
- return Value.uval;
-}
-
-Optional<ArrayRef<uint8_t>> DWARFFormValue::getAsBlock() const {
- if (!isFormClass(FC_Block) && !isFormClass(FC_Exprloc))
- return None;
- return ArrayRef<uint8_t>(Value.data, Value.uval);
-}
-