diff options
Diffstat (limited to 'contrib/llvm/lib/DebugInfo/DWARFDebugInfoEntry.cpp')
| -rw-r--r-- | contrib/llvm/lib/DebugInfo/DWARFDebugInfoEntry.cpp | 311 |
1 files changed, 127 insertions, 184 deletions
diff --git a/contrib/llvm/lib/DebugInfo/DWARFDebugInfoEntry.cpp b/contrib/llvm/lib/DebugInfo/DWARFDebugInfoEntry.cpp index 10be7b4..babfd2e 100644 --- a/contrib/llvm/lib/DebugInfo/DWARFDebugInfoEntry.cpp +++ b/contrib/llvm/lib/DebugInfo/DWARFDebugInfoEntry.cpp @@ -19,11 +19,10 @@ using namespace llvm; using namespace dwarf; -void DWARFDebugInfoEntryMinimal::dump(raw_ostream &OS, - const DWARFCompileUnit *cu, +void DWARFDebugInfoEntryMinimal::dump(raw_ostream &OS, const DWARFUnit *u, unsigned recurseDepth, unsigned indent) const { - DataExtractor debug_info_data = cu->getDebugInfoExtractor(); + DataExtractor debug_info_data = u->getDebugInfoExtractor(); uint32_t offset = Offset; if (debug_info_data.isValidOffset(offset)) { @@ -45,13 +44,13 @@ void DWARFDebugInfoEntryMinimal::dump(raw_ostream &OS, for (uint32_t i = 0; i != numAttributes; ++i) { uint16_t attr = AbbrevDecl->getAttrByIndex(i); uint16_t form = AbbrevDecl->getFormByIndex(i); - dumpAttribute(OS, cu, &offset, attr, form, indent); + dumpAttribute(OS, u, &offset, attr, form, indent); } const DWARFDebugInfoEntryMinimal *child = getFirstChild(); if (recurseDepth > 0 && child) { while (child) { - child->dump(OS, cu, recurseDepth-1, indent+2); + child->dump(OS, u, recurseDepth-1, indent+2); child = child->getSibling(); } } @@ -66,12 +65,11 @@ void DWARFDebugInfoEntryMinimal::dump(raw_ostream &OS, } void DWARFDebugInfoEntryMinimal::dumpAttribute(raw_ostream &OS, - const DWARFCompileUnit *cu, - uint32_t* offset_ptr, - uint16_t attr, - uint16_t form, + const DWARFUnit *u, + uint32_t *offset_ptr, + uint16_t attr, uint16_t form, unsigned indent) const { - OS << format("0x%8.8x: ", *offset_ptr); + OS << " "; OS.indent(indent+2); const char *attrString = AttributeString(attr); if (attrString) @@ -86,57 +84,20 @@ void DWARFDebugInfoEntryMinimal::dumpAttribute(raw_ostream &OS, DWARFFormValue formValue(form); - if (!formValue.extractValue(cu->getDebugInfoExtractor(), offset_ptr, cu)) + if (!formValue.extractValue(u->getDebugInfoExtractor(), offset_ptr, u)) return; OS << "\t("; - formValue.dump(OS, cu); + formValue.dump(OS, u); OS << ")\n"; } -bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFCompileUnit *CU, - const uint8_t *FixedFormSizes, +bool DWARFDebugInfoEntryMinimal::extractFast(const DWARFUnit *U, 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; - } - 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 *OffsetPtr) { - DataExtractor DebugInfoData = CU->getDebugInfoExtractor(); - const uint32_t CUEndOffset = CU->getNextCompileUnitOffset(); - Offset = *OffsetPtr; - if ((Offset >= CUEndOffset) || !DebugInfoData.isValidOffset(Offset)) + DataExtractor DebugInfoData = U->getDebugInfoExtractor(); + uint32_t UEndOffset = U->getNextUnitOffset(); + if (Offset >= UEndOffset || !DebugInfoData.isValidOffset(Offset)) return false; uint64_t AbbrCode = DebugInfoData.getULEB128(OffsetPtr); if (0 == AbbrCode) { @@ -144,31 +105,25 @@ DWARFDebugInfoEntryMinimal::extract(const DWARFCompileUnit *CU, AbbrevDecl = NULL; return true; } - AbbrevDecl = CU->getAbbreviations()->getAbbreviationDeclaration(AbbrCode); + AbbrevDecl = U->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); + ArrayRef<uint8_t> FixedFormSizes = DWARFFormValue::getFixedFormSizes( + U->getAddressByteSize(), U->getVersion()); + assert(FixedFormSizes.size() > 0); // 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 (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 if (!DWARFFormValue::skipValue(Form, DebugInfoData, OffsetPtr, - CU)) { + uint8_t FixedFormSize = + (Form < FixedFormSizes.size()) ? FixedFormSizes[Form] : 0; + if (FixedFormSize) + *OffsetPtr += FixedFormSize; + else if (!DWARFFormValue::skipValue(Form, DebugInfoData, OffsetPtr, U)) { // Restore the original offset. *OffsetPtr = Offset; return false; @@ -187,203 +142,191 @@ bool DWARFDebugInfoEntryMinimal::isSubroutineDIE() const { Tag == DW_TAG_inlined_subroutine; } -uint32_t -DWARFDebugInfoEntryMinimal::getAttributeValue(const DWARFCompileUnit *cu, - const uint16_t attr, - DWARFFormValue &form_value, - uint32_t *end_attr_offset_ptr) - const { - if (AbbrevDecl) { - uint32_t attr_idx = AbbrevDecl->findAttributeIndex(attr); - - if (attr_idx != -1U) { - uint32_t offset = getOffset(); +bool DWARFDebugInfoEntryMinimal::getAttributeValue( + const DWARFUnit *U, const uint16_t Attr, DWARFFormValue &FormValue) const { + if (!AbbrevDecl) + return false; - DataExtractor debug_info_data = cu->getDebugInfoExtractor(); + uint32_t AttrIdx = AbbrevDecl->findAttributeIndex(Attr); + if (AttrIdx == -1U) + return false; - // Skip the abbreviation code so we are at the data for the attributes - debug_info_data.getULEB128(&offset); + DataExtractor DebugInfoData = U->getDebugInfoExtractor(); + uint32_t DebugInfoOffset = getOffset(); - uint32_t idx = 0; - while (idx < attr_idx) - DWARFFormValue::skipValue(AbbrevDecl->getFormByIndex(idx++), - debug_info_data, &offset, cu); + // Skip the abbreviation code so we are at the data for the attributes + DebugInfoData.getULEB128(&DebugInfoOffset); - const uint32_t attr_offset = offset; - form_value = DWARFFormValue(AbbrevDecl->getFormByIndex(idx)); - if (form_value.extractValue(debug_info_data, &offset, cu)) { - if (end_attr_offset_ptr) - *end_attr_offset_ptr = offset; - return attr_offset; - } - } + // Skip preceding attribute values. + for (uint32_t i = 0; i < AttrIdx; ++i) { + DWARFFormValue::skipValue(AbbrevDecl->getFormByIndex(i), + DebugInfoData, &DebugInfoOffset, U); } - return 0; + FormValue = DWARFFormValue(AbbrevDecl->getFormByIndex(AttrIdx)); + return FormValue.extractValue(DebugInfoData, &DebugInfoOffset, U); } -const char* -DWARFDebugInfoEntryMinimal::getAttributeValueAsString( - const DWARFCompileUnit* cu, - const uint16_t attr, - const char* fail_value) - const { - DWARFFormValue form_value; - if (getAttributeValue(cu, attr, form_value)) { - DataExtractor stringExtractor(cu->getStringSection(), false, 0); - return form_value.getAsCString(&stringExtractor); - } - return fail_value; +const char *DWARFDebugInfoEntryMinimal::getAttributeValueAsString( + const DWARFUnit *U, const uint16_t Attr, const char *FailValue) const { + DWARFFormValue FormValue; + if (!getAttributeValue(U, Attr, FormValue)) + return FailValue; + Optional<const char *> Result = FormValue.getAsCString(U); + return Result.hasValue() ? Result.getValue() : FailValue; +} + +uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsAddress( + const DWARFUnit *U, const uint16_t Attr, uint64_t FailValue) const { + DWARFFormValue FormValue; + if (!getAttributeValue(U, Attr, FormValue)) + return FailValue; + Optional<uint64_t> Result = FormValue.getAsAddress(U); + return Result.hasValue() ? Result.getValue() : FailValue; } -uint64_t -DWARFDebugInfoEntryMinimal::getAttributeValueAsUnsigned( - const DWARFCompileUnit* cu, - const uint16_t attr, - uint64_t fail_value) const { - DWARFFormValue form_value; - if (getAttributeValue(cu, attr, form_value)) - return form_value.getUnsigned(); - return fail_value; +uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsUnsignedConstant( + const DWARFUnit *U, const uint16_t Attr, uint64_t FailValue) const { + DWARFFormValue FormValue; + if (!getAttributeValue(U, Attr, FormValue)) + return FailValue; + Optional<uint64_t> Result = FormValue.getAsUnsignedConstant(); + return Result.hasValue() ? Result.getValue() : FailValue; } -int64_t -DWARFDebugInfoEntryMinimal::getAttributeValueAsSigned( - const DWARFCompileUnit* cu, - const uint16_t attr, - int64_t fail_value) const { - DWARFFormValue form_value; - if (getAttributeValue(cu, attr, form_value)) - return form_value.getSigned(); - return fail_value; +uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsReference( + const DWARFUnit *U, const uint16_t Attr, uint64_t FailValue) const { + DWARFFormValue FormValue; + if (!getAttributeValue(U, Attr, FormValue)) + return FailValue; + Optional<uint64_t> Result = FormValue.getAsReference(U); + return Result.hasValue() ? Result.getValue() : FailValue; } -uint64_t -DWARFDebugInfoEntryMinimal::getAttributeValueAsReference( - const DWARFCompileUnit* cu, - const uint16_t attr, - uint64_t fail_value) - const { - DWARFFormValue form_value; - if (getAttributeValue(cu, attr, form_value)) - return form_value.getReference(cu); - return fail_value; +uint64_t DWARFDebugInfoEntryMinimal::getAttributeValueAsSectionOffset( + const DWARFUnit *U, const uint16_t Attr, uint64_t FailValue) const { + DWARFFormValue FormValue; + if (!getAttributeValue(U, Attr, FormValue)) + return FailValue; + Optional<uint64_t> Result = FormValue.getAsSectionOffset(); + return Result.hasValue() ? Result.getValue() : FailValue; } -bool DWARFDebugInfoEntryMinimal::getLowAndHighPC(const DWARFCompileUnit *CU, +bool DWARFDebugInfoEntryMinimal::getLowAndHighPC(const DWARFUnit *U, uint64_t &LowPC, uint64_t &HighPC) const { - HighPC = -1ULL; - LowPC = getAttributeValueAsUnsigned(CU, DW_AT_low_pc, -1ULL); - if (LowPC != -1ULL) - HighPC = getAttributeValueAsUnsigned(CU, DW_AT_high_pc, -1ULL); + LowPC = getAttributeValueAsAddress(U, DW_AT_low_pc, -1ULL); + if (LowPC == -1ULL) + return false; + HighPC = getAttributeValueAsAddress(U, DW_AT_high_pc, -1ULL); + if (HighPC == -1ULL) { + // Since DWARF4, DW_AT_high_pc may also be of class constant, in which case + // it represents function size. + HighPC = getAttributeValueAsUnsignedConstant(U, DW_AT_high_pc, -1ULL); + if (HighPC != -1ULL) + HighPC += LowPC; + } return (HighPC != -1ULL); } -void -DWARFDebugInfoEntryMinimal::buildAddressRangeTable(const DWARFCompileUnit *CU, - DWARFDebugAranges *DebugAranges) - const { +void DWARFDebugInfoEntryMinimal::buildAddressRangeTable( + const DWARFUnit *U, DWARFDebugAranges *DebugAranges, + uint32_t UOffsetInAranges) const { if (AbbrevDecl) { if (isSubprogramDIE()) { uint64_t LowPC, HighPC; - if (getLowAndHighPC(CU, LowPC, HighPC)) { - DebugAranges->appendRange(CU->getOffset(), LowPC, HighPC); - } + if (getLowAndHighPC(U, LowPC, HighPC)) + DebugAranges->appendRange(UOffsetInAranges, LowPC, HighPC); // FIXME: try to append ranges from .debug_ranges section. } - const DWARFDebugInfoEntryMinimal *child = getFirstChild(); - while (child) { - child->buildAddressRangeTable(CU, DebugAranges); - child = child->getSibling(); + const DWARFDebugInfoEntryMinimal *Child = getFirstChild(); + while (Child) { + Child->buildAddressRangeTable(U, DebugAranges, UOffsetInAranges); + Child = Child->getSibling(); } } } -bool -DWARFDebugInfoEntryMinimal::addressRangeContainsAddress( - const DWARFCompileUnit *CU, - const uint64_t Address) - const { +bool DWARFDebugInfoEntryMinimal::addressRangeContainsAddress( + const DWARFUnit *U, const uint64_t Address) const { if (isNULL()) return false; uint64_t LowPC, HighPC; - if (getLowAndHighPC(CU, LowPC, HighPC)) + if (getLowAndHighPC(U, LowPC, HighPC)) return (LowPC <= Address && Address <= HighPC); // Try to get address ranges from .debug_ranges section. - uint32_t RangesOffset = getAttributeValueAsReference(CU, DW_AT_ranges, -1U); + uint32_t RangesOffset = + getAttributeValueAsSectionOffset(U, DW_AT_ranges, -1U); if (RangesOffset != -1U) { DWARFDebugRangeList RangeList; - if (CU->extractRangeList(RangesOffset, RangeList)) - return RangeList.containsAddress(CU->getBaseAddress(), Address); + if (U->extractRangeList(RangesOffset, RangeList)) + return RangeList.containsAddress(U->getBaseAddress(), Address); } return false; } -const char* -DWARFDebugInfoEntryMinimal::getSubroutineName(const DWARFCompileUnit *CU) - const { +const char * +DWARFDebugInfoEntryMinimal::getSubroutineName(const DWARFUnit *U) const { if (!isSubroutineDIE()) return 0; // Try to get mangled name if possible. if (const char *name = - getAttributeValueAsString(CU, DW_AT_MIPS_linkage_name, 0)) + getAttributeValueAsString(U, DW_AT_MIPS_linkage_name, 0)) return name; - if (const char *name = getAttributeValueAsString(CU, DW_AT_linkage_name, 0)) + if (const char *name = getAttributeValueAsString(U, DW_AT_linkage_name, 0)) return name; - if (const char *name = getAttributeValueAsString(CU, DW_AT_name, 0)) + if (const char *name = getAttributeValueAsString(U, DW_AT_name, 0)) return name; // Try to get name from specification DIE. uint32_t spec_ref = - getAttributeValueAsReference(CU, DW_AT_specification, -1U); + getAttributeValueAsReference(U, DW_AT_specification, -1U); if (spec_ref != -1U) { DWARFDebugInfoEntryMinimal spec_die; - if (spec_die.extract(CU, &spec_ref)) { - if (const char *name = spec_die.getSubroutineName(CU)) + if (spec_die.extractFast(U, &spec_ref)) { + if (const char *name = spec_die.getSubroutineName(U)) return name; } } // Try to get name from abstract origin DIE. uint32_t abs_origin_ref = - getAttributeValueAsReference(CU, DW_AT_abstract_origin, -1U); + getAttributeValueAsReference(U, DW_AT_abstract_origin, -1U); if (abs_origin_ref != -1U) { DWARFDebugInfoEntryMinimal abs_origin_die; - if (abs_origin_die.extract(CU, &abs_origin_ref)) { - if (const char *name = abs_origin_die.getSubroutineName(CU)) + if (abs_origin_die.extractFast(U, &abs_origin_ref)) { + if (const char *name = abs_origin_die.getSubroutineName(U)) return name; } } return 0; } -void DWARFDebugInfoEntryMinimal::getCallerFrame(const DWARFCompileUnit *CU, +void DWARFDebugInfoEntryMinimal::getCallerFrame(const DWARFUnit *U, uint32_t &CallFile, uint32_t &CallLine, uint32_t &CallColumn) const { - CallFile = getAttributeValueAsUnsigned(CU, DW_AT_call_file, 0); - CallLine = getAttributeValueAsUnsigned(CU, DW_AT_call_line, 0); - CallColumn = getAttributeValueAsUnsigned(CU, DW_AT_call_column, 0); + CallFile = getAttributeValueAsUnsignedConstant(U, DW_AT_call_file, 0); + CallLine = getAttributeValueAsUnsignedConstant(U, DW_AT_call_line, 0); + CallColumn = getAttributeValueAsUnsignedConstant(U, DW_AT_call_column, 0); } -DWARFDebugInfoEntryMinimal::InlinedChain +DWARFDebugInfoEntryInlinedChain DWARFDebugInfoEntryMinimal::getInlinedChainForAddress( - const DWARFCompileUnit *CU, - const uint64_t Address) - const { - DWARFDebugInfoEntryMinimal::InlinedChain InlinedChain; + const DWARFUnit *U, const uint64_t Address) const { + DWARFDebugInfoEntryInlinedChain InlinedChain; + InlinedChain.U = U; if (isNULL()) return InlinedChain; for (const DWARFDebugInfoEntryMinimal *DIE = this; DIE; ) { // Append current DIE to inlined chain only if it has correct tag // (e.g. it is not a lexical block). if (DIE->isSubroutineDIE()) { - InlinedChain.push_back(*DIE); + InlinedChain.DIEs.push_back(*DIE); } // Try to get child which also contains provided address. const DWARFDebugInfoEntryMinimal *Child = DIE->getFirstChild(); while (Child) { - if (Child->addressRangeContainsAddress(CU, Address)) { + if (Child->addressRangeContainsAddress(U, Address)) { // Assume there is only one such child. break; } @@ -392,6 +335,6 @@ DWARFDebugInfoEntryMinimal::getInlinedChainForAddress( DIE = Child; } // Reverse the obtained chain to make the root of inlined chain last. - std::reverse(InlinedChain.begin(), InlinedChain.end()); + std::reverse(InlinedChain.DIEs.begin(), InlinedChain.DIEs.end()); return InlinedChain; } |
