mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-27 13:30:05 +00:00
DWARF parser: remove duplicated code and fix code style in DIE extractors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179023 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov
parent
9d55c099d6
commit
d6b89ef0fa
@ -94,279 +94,87 @@ void DWARFDebugInfoEntryMinimal::dumpAttribute(raw_ostream &OS,
|
||||
OS << ")\n";
|
||||
}
|
||||
|
||||
bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFCompileUnit *cu,
|
||||
const uint8_t *fixed_form_sizes,
|
||||
uint32_t *offset_ptr) {
|
||||
Offset = *offset_ptr;
|
||||
|
||||
DataExtractor debug_info_data = cu->getDebugInfoExtractor();
|
||||
uint64_t abbrCode = debug_info_data.getULEB128(offset_ptr);
|
||||
|
||||
assert(fixed_form_sizes); // For best performance this should be specified!
|
||||
|
||||
if (abbrCode) {
|
||||
uint32_t offset = *offset_ptr;
|
||||
|
||||
AbbrevDecl = cu->getAbbreviations()->getAbbreviationDeclaration(abbrCode);
|
||||
|
||||
// Skip all data in the .debug_info for the attributes
|
||||
const uint32_t numAttributes = AbbrevDecl->getNumAttributes();
|
||||
uint32_t i;
|
||||
uint16_t form;
|
||||
for (i=0; i<numAttributes; ++i) {
|
||||
|
||||
form = AbbrevDecl->getFormByIndex(i);
|
||||
|
||||
// FIXME: Currently we're checking if this is less than the last
|
||||
// entry in the fixed_form_sizes table, but this should be changed
|
||||
// to use dynamic dispatch.
|
||||
const uint8_t fixed_skip_size = (form < DW_FORM_ref_sig8) ?
|
||||
fixed_form_sizes[form] : 0;
|
||||
if (fixed_skip_size)
|
||||
offset += fixed_skip_size;
|
||||
else {
|
||||
bool form_is_indirect = false;
|
||||
do {
|
||||
form_is_indirect = false;
|
||||
uint32_t form_size = 0;
|
||||
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:
|
||||
form_size = debug_info_data.getULEB128(&offset);
|
||||
break;
|
||||
case DW_FORM_block1:
|
||||
form_size = debug_info_data.getU8(&offset);
|
||||
break;
|
||||
case DW_FORM_block2:
|
||||
form_size = debug_info_data.getU16(&offset);
|
||||
break;
|
||||
case DW_FORM_block4:
|
||||
form_size = debug_info_data.getU32(&offset);
|
||||
break;
|
||||
|
||||
// Inlined NULL terminated C-strings
|
||||
case DW_FORM_string:
|
||||
debug_info_data.getCStr(&offset);
|
||||
break;
|
||||
|
||||
// Compile unit address sized values
|
||||
case DW_FORM_addr:
|
||||
case DW_FORM_ref_addr:
|
||||
form_size = cu->getAddressByteSize();
|
||||
break;
|
||||
|
||||
// 0 sized form.
|
||||
case DW_FORM_flag_present:
|
||||
form_size = 0;
|
||||
break;
|
||||
|
||||
// 1 byte values
|
||||
case DW_FORM_data1:
|
||||
case DW_FORM_flag:
|
||||
case DW_FORM_ref1:
|
||||
form_size = 1;
|
||||
break;
|
||||
|
||||
// 2 byte values
|
||||
case DW_FORM_data2:
|
||||
case DW_FORM_ref2:
|
||||
form_size = 2;
|
||||
break;
|
||||
|
||||
// 4 byte values
|
||||
case DW_FORM_strp:
|
||||
case DW_FORM_data4:
|
||||
case DW_FORM_ref4:
|
||||
form_size = 4;
|
||||
break;
|
||||
|
||||
// 8 byte values
|
||||
case DW_FORM_data8:
|
||||
case DW_FORM_ref8:
|
||||
case DW_FORM_ref_sig8:
|
||||
form_size = 8;
|
||||
break;
|
||||
|
||||
// signed or unsigned LEB 128 values
|
||||
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);
|
||||
break;
|
||||
|
||||
case DW_FORM_indirect:
|
||||
form_is_indirect = true;
|
||||
form = debug_info_data.getULEB128(&offset);
|
||||
break;
|
||||
|
||||
// FIXME: 64-bit for DWARF64
|
||||
case DW_FORM_sec_offset:
|
||||
debug_info_data.getU32(offset_ptr);
|
||||
break;
|
||||
|
||||
default:
|
||||
*offset_ptr = Offset;
|
||||
return false;
|
||||
}
|
||||
offset += form_size;
|
||||
} while (form_is_indirect);
|
||||
}
|
||||
}
|
||||
*offset_ptr = offset;
|
||||
return true;
|
||||
} else {
|
||||
bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFCompileUnit *CU,
|
||||
const uint8_t *FixedFormSizes,
|
||||
uint32_t *OffsetPtr) {
|
||||
Offset = *OffsetPtr;
|
||||
DataExtractor DebugInfoData = CU->getDebugInfoExtractor();
|
||||
uint64_t AbbrCode = DebugInfoData.getULEB128(OffsetPtr);
|
||||
if (0 == AbbrCode) {
|
||||
// NULL debug tag entry.
|
||||
AbbrevDecl = NULL;
|
||||
return true; // NULL debug tag entry
|
||||
return true;
|
||||
}
|
||||
AbbrevDecl = CU->getAbbreviations()->getAbbreviationDeclaration(AbbrCode);
|
||||
assert(AbbrevDecl);
|
||||
assert(FixedFormSizes); // For best performance this should be specified!
|
||||
|
||||
// Skip all data in the .debug_info for the attributes
|
||||
for (uint32_t i = 0, n = AbbrevDecl->getNumAttributes(); i < n; ++i) {
|
||||
uint16_t Form = AbbrevDecl->getFormByIndex(i);
|
||||
|
||||
// FIXME: Currently we're checking if this is less than the last
|
||||
// entry in the fixed_form_sizes table, but this should be changed
|
||||
// to use dynamic dispatch.
|
||||
uint8_t FixedFormSize =
|
||||
(Form < DW_FORM_ref_sig8) ? FixedFormSizes[Form] : 0;
|
||||
if (FixedFormSize)
|
||||
*OffsetPtr += FixedFormSize;
|
||||
else if (!DWARFFormValue::skipValue(Form, DebugInfoData, OffsetPtr,
|
||||
CU)) {
|
||||
// Restore the original offset.
|
||||
*OffsetPtr = Offset;
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool
|
||||
DWARFDebugInfoEntryMinimal::extract(const DWARFCompileUnit *cu,
|
||||
uint32_t *offset_ptr) {
|
||||
DataExtractor debug_info_data = cu->getDebugInfoExtractor();
|
||||
const uint32_t cu_end_offset = cu->getNextCompileUnitOffset();
|
||||
const uint8_t cu_addr_size = cu->getAddressByteSize();
|
||||
uint32_t offset = *offset_ptr;
|
||||
if ((offset < cu_end_offset) && debug_info_data.isValidOffset(offset)) {
|
||||
Offset = offset;
|
||||
DWARFDebugInfoEntryMinimal::extract(const DWARFCompileUnit *CU,
|
||||
uint32_t *OffsetPtr) {
|
||||
DataExtractor DebugInfoData = CU->getDebugInfoExtractor();
|
||||
const uint32_t CUEndOffset = CU->getNextCompileUnitOffset();
|
||||
Offset = *OffsetPtr;
|
||||
if ((Offset >= CUEndOffset) || !DebugInfoData.isValidOffset(Offset))
|
||||
return false;
|
||||
uint64_t AbbrCode = DebugInfoData.getULEB128(OffsetPtr);
|
||||
if (0 == AbbrCode) {
|
||||
// NULL debug tag entry.
|
||||
AbbrevDecl = NULL;
|
||||
return true;
|
||||
}
|
||||
AbbrevDecl = CU->getAbbreviations()->getAbbreviationDeclaration(AbbrCode);
|
||||
if (0 == AbbrevDecl) {
|
||||
// Restore the original offset.
|
||||
*OffsetPtr = Offset;
|
||||
return false;
|
||||
}
|
||||
bool IsCompileUnitTag = (AbbrevDecl->getTag() == DW_TAG_compile_unit);
|
||||
if (IsCompileUnitTag)
|
||||
const_cast<DWARFCompileUnit*>(CU)->setBaseAddress(0);
|
||||
|
||||
uint64_t abbrCode = debug_info_data.getULEB128(&offset);
|
||||
// Skip all data in the .debug_info for the attributes
|
||||
for (uint32_t i = 0, n = AbbrevDecl->getNumAttributes(); i < n; ++i) {
|
||||
uint16_t Attr = AbbrevDecl->getAttrByIndex(i);
|
||||
uint16_t Form = AbbrevDecl->getFormByIndex(i);
|
||||
|
||||
if (abbrCode) {
|
||||
AbbrevDecl = cu->getAbbreviations()->getAbbreviationDeclaration(abbrCode);
|
||||
|
||||
if (AbbrevDecl) {
|
||||
uint16_t tag = AbbrevDecl->getTag();
|
||||
|
||||
bool isCompileUnitTag = tag == DW_TAG_compile_unit;
|
||||
if(cu && isCompileUnitTag)
|
||||
const_cast<DWARFCompileUnit*>(cu)->setBaseAddress(0);
|
||||
|
||||
// Skip all data in the .debug_info for the attributes
|
||||
const uint32_t numAttributes = AbbrevDecl->getNumAttributes();
|
||||
for (uint32_t i = 0; i != numAttributes; ++i) {
|
||||
uint16_t attr = AbbrevDecl->getAttrByIndex(i);
|
||||
uint16_t form = AbbrevDecl->getFormByIndex(i);
|
||||
|
||||
if (isCompileUnitTag &&
|
||||
((attr == DW_AT_entry_pc) || (attr == DW_AT_low_pc))) {
|
||||
DWARFFormValue form_value(form);
|
||||
if (form_value.extractValue(debug_info_data, &offset, cu)) {
|
||||
if (attr == DW_AT_low_pc || attr == DW_AT_entry_pc)
|
||||
const_cast<DWARFCompileUnit*>(cu)
|
||||
->setBaseAddress(form_value.getUnsigned());
|
||||
}
|
||||
} else {
|
||||
bool form_is_indirect = false;
|
||||
do {
|
||||
form_is_indirect = false;
|
||||
register uint32_t form_size = 0;
|
||||
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:
|
||||
form_size = debug_info_data.getULEB128(&offset);
|
||||
break;
|
||||
case DW_FORM_block1:
|
||||
form_size = debug_info_data.getU8(&offset);
|
||||
break;
|
||||
case DW_FORM_block2:
|
||||
form_size = debug_info_data.getU16(&offset);
|
||||
break;
|
||||
case DW_FORM_block4:
|
||||
form_size = debug_info_data.getU32(&offset);
|
||||
break;
|
||||
|
||||
// Inlined NULL terminated C-strings
|
||||
case DW_FORM_string:
|
||||
debug_info_data.getCStr(&offset);
|
||||
break;
|
||||
|
||||
// Compile unit address sized values
|
||||
case DW_FORM_addr:
|
||||
case DW_FORM_ref_addr:
|
||||
form_size = cu_addr_size;
|
||||
break;
|
||||
|
||||
// 0 byte value
|
||||
case DW_FORM_flag_present:
|
||||
form_size = 0;
|
||||
break;
|
||||
|
||||
// 1 byte values
|
||||
case DW_FORM_data1:
|
||||
case DW_FORM_flag:
|
||||
case DW_FORM_ref1:
|
||||
form_size = 1;
|
||||
break;
|
||||
|
||||
// 2 byte values
|
||||
case DW_FORM_data2:
|
||||
case DW_FORM_ref2:
|
||||
form_size = 2;
|
||||
break;
|
||||
|
||||
// 4 byte values
|
||||
case DW_FORM_strp:
|
||||
form_size = 4;
|
||||
break;
|
||||
|
||||
case DW_FORM_data4:
|
||||
case DW_FORM_ref4:
|
||||
form_size = 4;
|
||||
break;
|
||||
|
||||
// 8 byte values
|
||||
case DW_FORM_data8:
|
||||
case DW_FORM_ref8:
|
||||
case DW_FORM_ref_sig8:
|
||||
form_size = 8;
|
||||
break;
|
||||
|
||||
// signed or unsigned LEB 128 values
|
||||
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);
|
||||
break;
|
||||
|
||||
case DW_FORM_indirect:
|
||||
form = debug_info_data.getULEB128(&offset);
|
||||
form_is_indirect = true;
|
||||
break;
|
||||
|
||||
// FIXME: 64-bit for DWARF64.
|
||||
case DW_FORM_sec_offset:
|
||||
debug_info_data.getU32(offset_ptr);
|
||||
break;
|
||||
|
||||
default:
|
||||
*offset_ptr = offset;
|
||||
return false;
|
||||
}
|
||||
|
||||
offset += form_size;
|
||||
} while (form_is_indirect);
|
||||
}
|
||||
}
|
||||
*offset_ptr = offset;
|
||||
return true;
|
||||
if (IsCompileUnitTag &&
|
||||
((Attr == DW_AT_entry_pc) || (Attr == DW_AT_low_pc))) {
|
||||
DWARFFormValue FormValue(Form);
|
||||
if (FormValue.extractValue(DebugInfoData, OffsetPtr, CU)) {
|
||||
if (Attr == DW_AT_low_pc || Attr == DW_AT_entry_pc)
|
||||
const_cast<DWARFCompileUnit*>(CU)
|
||||
->setBaseAddress(FormValue.getUnsigned());
|
||||
}
|
||||
} else {
|
||||
AbbrevDecl = NULL;
|
||||
*offset_ptr = offset;
|
||||
return true; // NULL debug tag entry
|
||||
} else if (!DWARFFormValue::skipValue(Form, DebugInfoData, OffsetPtr,
|
||||
CU)) {
|
||||
// Restore the original offset.
|
||||
*OffsetPtr = Offset;
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
return true;
|
||||
}
|
||||
|
||||
bool DWARFDebugInfoEntryMinimal::isSubprogramDIE() const {
|
||||
|
||||
@ -45,12 +45,17 @@ public:
|
||||
uint32_t *offset_ptr, uint16_t attr, uint16_t form,
|
||||
unsigned indent = 0) const;
|
||||
|
||||
bool extractFast(const DWARFCompileUnit *cu, const uint8_t *fixed_form_sizes,
|
||||
uint32_t *offset_ptr);
|
||||
/// Extracts a debug info entry, which is a child of a given compile unit,
|
||||
/// starting at a given offset. If DIE can't be extracted, returns false and
|
||||
/// doesn't change OffsetPtr.
|
||||
bool extractFast(const DWARFCompileUnit *CU, const uint8_t *FixedFormSizes,
|
||||
uint32_t *OffsetPtr);
|
||||
|
||||
/// Extract a debug info entry for a given compile unit from the
|
||||
/// .debug_info and .debug_abbrev data starting at the given offset.
|
||||
bool extract(const DWARFCompileUnit *cu, uint32_t *offset_ptr);
|
||||
/// If compile unit can't be parsed, returns false and doesn't change
|
||||
/// OffsetPtr.
|
||||
bool extract(const DWARFCompileUnit *CU, uint32_t *OffsetPtr);
|
||||
|
||||
uint32_t getTag() const { return AbbrevDecl ? AbbrevDecl->getTag() : 0; }
|
||||
bool isNULL() const { return AbbrevDecl == 0; }
|
||||
|
||||
Loading…
Reference in New Issue
Block a user