[SystemZ][z/OS] TXT records in the GOFF reader #74526
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
|
@llvm/pr-subscribers-llvm-binary-utilities Author: Yusra Syeda (ysyeda) ChangesThis PR adds handling for TXT records in the GOFF reader. Full diff: https://github.com/llvm/llvm-project/pull/74526.diff 4 Files Affected:
diff --git a/llvm/include/llvm/Object/GOFF.h b/llvm/include/llvm/Object/GOFF.h
index 91762457ae056..79f96e23b5781 100644
--- a/llvm/include/llvm/Object/GOFF.h
+++ b/llvm/include/llvm/Object/GOFF.h
@@ -73,6 +73,30 @@ class Record {
}
};
+class TXTRecord : public Record {
+public:
+ /// \brief Maximum length of data; any more must go in continuation.
+ static const uint8_t TXTMaxDataLength = 56;
+
+public:
+
+ // Get routines.
+ static Error getData(const uint8_t *Record,
+ SmallString<256> &CompleteData);
+
+ static void getElementEsdId(const uint8_t *Record, uint32_t &EsdId) {
+ get<uint32_t>(Record, 4, EsdId);
+ }
+
+ static void getOffset(const uint8_t *Record, uint32_t &Offset) {
+ get<uint32_t>(Record, 12, Offset);
+ }
+
+ static void getDataLength(const uint8_t *Record, uint16_t &Length) {
+ get<uint16_t>(Record, 22, Length);
+ }
+};
+
class HDRRecord : public Record {
public:
static Error getData(const uint8_t *Record, SmallString<256> &CompleteData);
diff --git a/llvm/include/llvm/Object/GOFFObjectFile.h b/llvm/include/llvm/Object/GOFFObjectFile.h
index 7e1ceb95f6672..0f36663897b58 100644
--- a/llvm/include/llvm/Object/GOFFObjectFile.h
+++ b/llvm/include/llvm/Object/GOFFObjectFile.h
@@ -29,7 +29,10 @@ namespace llvm {
namespace object {
class GOFFObjectFile : public ObjectFile {
+ friend class GOFFSymbolRef;
+
IndexedMap<const uint8_t *> EsdPtrs; // Indexed by EsdId.
+ SmallVector<const uint8_t *, 256> TextPtrs;
mutable DenseMap<uint32_t, std::pair<size_t, std::unique_ptr<char[]>>>
EsdNamesCache;
@@ -38,7 +41,8 @@ class GOFFObjectFile : public ObjectFile {
// (EDID, 0) code, r/o data section
// (EDID,PRID) r/w data section
SmallVector<SectionEntryImpl, 256> SectionList;
- mutable DenseMap<uint32_t, std::string> SectionDataCache;
+ mutable DenseMap<uint32_t, std::pair<size_t, std::unique_ptr<uint8_t[]>>>
+ SectionDataCache;
public:
Expected<StringRef> getSymbolName(SymbolRef Symbol) const;
@@ -66,6 +70,10 @@ class GOFFObjectFile : public ObjectFile {
return true;
}
+ bool isSectionNoLoad(DataRefImpl Sec) const;
+ bool isSectionReadOnlyData(DataRefImpl Sec) const;
+ bool isSectionZeroInit(DataRefImpl Sec) const;
+
private:
// SymbolRef.
Expected<StringRef> getSymbolName(DataRefImpl Symb) const override;
@@ -75,27 +83,24 @@ class GOFFObjectFile : public ObjectFile {
Expected<uint32_t> getSymbolFlags(DataRefImpl Symb) const override;
Expected<SymbolRef::Type> getSymbolType(DataRefImpl Symb) const override;
Expected<section_iterator> getSymbolSection(DataRefImpl Symb) const override;
+ uint64_t getSymbolSize(DataRefImpl Symb) const;
const uint8_t *getSymbolEsdRecord(DataRefImpl Symb) const;
bool isSymbolUnresolved(DataRefImpl Symb) const;
bool isSymbolIndirect(DataRefImpl Symb) const;
// SectionRef.
- void moveSectionNext(DataRefImpl &Sec) const override {}
- virtual Expected<StringRef> getSectionName(DataRefImpl Sec) const override {
- return StringRef();
- }
- uint64_t getSectionAddress(DataRefImpl Sec) const override { return 0; }
- uint64_t getSectionSize(DataRefImpl Sec) const override { return 0; }
+ void moveSectionNext(DataRefImpl &Sec) const override;
+ virtual Expected<StringRef> getSectionName(DataRefImpl Sec) const override;
+ uint64_t getSectionAddress(DataRefImpl Sec) const override;
+ uint64_t getSectionSize(DataRefImpl Sec) const override;
virtual Expected<ArrayRef<uint8_t>>
- getSectionContents(DataRefImpl Sec) const override {
- return ArrayRef<uint8_t>();
- }
- uint64_t getSectionIndex(DataRefImpl Sec) const override { return 0; }
- uint64_t getSectionAlignment(DataRefImpl Sec) const override { return 0; }
+ getSectionContents(DataRefImpl Sec) const override;
+ uint64_t getSectionIndex(DataRefImpl Sec) const override { return Sec.d.a; }
+ uint64_t getSectionAlignment(DataRefImpl Sec) const override;
bool isSectionCompressed(DataRefImpl Sec) const override { return false; }
- bool isSectionText(DataRefImpl Sec) const override { return false; }
- bool isSectionData(DataRefImpl Sec) const override { return false; }
+ bool isSectionText(DataRefImpl Sec) const override;
+ bool isSectionData(DataRefImpl Sec) const override;
bool isSectionBSS(DataRefImpl Sec) const override { return false; }
bool isSectionVirtual(DataRefImpl Sec) const override { return false; }
relocation_iterator section_rel_begin(DataRefImpl Sec) const override {
@@ -109,6 +114,7 @@ class GOFFObjectFile : public ObjectFile {
const uint8_t *getSectionPrEsdRecord(DataRefImpl &Sec) const;
const uint8_t *getSectionEdEsdRecord(uint32_t SectionIndex) const;
const uint8_t *getSectionPrEsdRecord(uint32_t SectionIndex) const;
+ uint32_t getSectionDefEsdId(DataRefImpl &Sec) const;
// RelocationRef.
void moveRelocationNext(DataRefImpl &Rel) const override {}
@@ -122,6 +128,29 @@ class GOFFObjectFile : public ObjectFile {
SmallVectorImpl<char> &Result) const override {}
};
+class GOFFSymbolRef : public SymbolRef {
+public:
+ GOFFSymbolRef(const SymbolRef &B) : SymbolRef(B) {
+ assert(isa<GOFFObjectFile>(SymbolRef::getObject()));
+ }
+
+ const GOFFObjectFile *getObject() const {
+ return cast<GOFFObjectFile>(BasicSymbolRef::getObject());
+ }
+
+ Expected<uint32_t> getSymbolGOFFFlags() const {
+ return getObject()->getSymbolFlags(getRawDataRefImpl());
+ }
+
+ Expected<SymbolRef::Type> getSymbolGOFFType() const {
+ return getObject()->getSymbolType(getRawDataRefImpl());
+ }
+
+ uint64_t getSize() const {
+ return getObject()->getSymbolSize(getRawDataRefImpl());
+ }
+};
+
} // namespace object
} // namespace llvm
diff --git a/llvm/lib/Object/GOFFObjectFile.cpp b/llvm/lib/Object/GOFFObjectFile.cpp
index 76a13559ebfe3..e13680073921d 100644
--- a/llvm/lib/Object/GOFFObjectFile.cpp
+++ b/llvm/lib/Object/GOFFObjectFile.cpp
@@ -168,6 +168,11 @@ GOFFObjectFile::GOFFObjectFile(MemoryBufferRef Object, Error &Err)
LLVM_DEBUG(dbgs() << " -- ESD " << EsdId << "\n");
break;
}
+ case GOFF::RT_TXT:
+ // Save TXT records.
+ TextPtrs.emplace_back(I);
+ LLVM_DEBUG(dbgs() << " -- TXT\n");
+ break;
case GOFF::RT_END:
LLVM_DEBUG(dbgs() << " -- END (GOFF record type) unhandled\n");
break;
@@ -364,6 +369,13 @@ GOFFObjectFile::getSymbolSection(DataRefImpl Symb) const {
std::to_string(SymEdId));
}
+uint64_t GOFFObjectFile::getSymbolSize(DataRefImpl Symb) const {
+ const uint8_t *Record = getSymbolEsdRecord(Symb);
+ uint32_t Length;
+ ESDRecord::getLength(Record, Length);
+ return Length;
+}
+
const uint8_t *GOFFObjectFile::getSectionEdEsdRecord(DataRefImpl &Sec) const {
SectionEntryImpl EsdIds = SectionList[Sec.d.a];
const uint8_t *EsdRecord = EsdPtrs[EsdIds.d.a];
@@ -394,6 +406,161 @@ GOFFObjectFile::getSectionPrEsdRecord(uint32_t SectionIndex) const {
return EsdRecord;
}
+uint32_t GOFFObjectFile::getSectionDefEsdId(DataRefImpl &Sec) const {
+ const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
+ uint32_t Length;
+ ESDRecord::getLength(EsdRecord, Length);
+ if (Length == 0) {
+ const uint8_t *PrEsdRecord = getSectionPrEsdRecord(Sec);
+ if (PrEsdRecord)
+ EsdRecord = PrEsdRecord;
+ }
+
+ uint32_t DefEsdId;
+ ESDRecord::getEsdId(EsdRecord, DefEsdId);
+ LLVM_DEBUG(dbgs() << "Got def EsdId: " << DefEsdId << '\n');
+ return DefEsdId;
+}
+
+void GOFFObjectFile::moveSectionNext(DataRefImpl &Sec) const {
+ Sec.d.a++;
+ if ((Sec.d.a) >= SectionList.size())
+ Sec.d.a = 0;
+}
+
+Expected<StringRef> GOFFObjectFile::getSectionName(DataRefImpl Sec) const {
+ DataRefImpl EdSym;
+ SectionEntryImpl EsdIds = SectionList[Sec.d.a];
+ EdSym.d.a = EsdIds.d.a;
+ Expected<StringRef> Name = getSymbolName(EdSym);
+ if (Name) {
+ StringRef Res = *Name;
+ LLVM_DEBUG(dbgs() << "Got section: " << Res << '\n');
+ // TODO: Make clang look for C____clangast instead of this
+ if (Res.equals("C___clangast"))
+ Res = "__clangast";
+ LLVM_DEBUG(dbgs() << "Final section name: " << Res << '\n');
+ Name = Res;
+ }
+ return Name;
+}
+
+uint64_t GOFFObjectFile::getSectionAddress(DataRefImpl Sec) const {
+ uint32_t Offset;
+ const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
+ ESDRecord::getOffset(EsdRecord, Offset);
+ return Offset;
+}
+
+uint64_t GOFFObjectFile::getSectionSize(DataRefImpl Sec) const {
+ uint32_t Length;
+ uint32_t DefEsdId = getSectionDefEsdId(Sec);
+ const uint8_t *EsdRecord = EsdPtrs[DefEsdId];
+ ESDRecord::getLength(EsdRecord, Length);
+ LLVM_DEBUG(dbgs() << "Got section size: " << Length << '\n');
+ return static_cast<uint64_t>(Length);
+}
+
+// Unravel TXT records and expand fill characters to produce
+// a contiguous sequence of bytes
+Expected<ArrayRef<uint8_t>>
+GOFFObjectFile::getSectionContents(DataRefImpl Sec) const {
+ if (SectionDataCache.count(Sec.d.a)) {
+ auto &Buf = SectionDataCache[Sec.d.a];
+ return ArrayRef<uint8_t>(Buf.second.get(), Buf.first);
+ }
+
+ uint64_t SectionSize = getSectionSize(Sec);
+ uint32_t DefEsdId = getSectionDefEsdId(Sec);
+
+ const uint8_t *EdEsdRecord = getSectionEdEsdRecord(Sec);
+ bool FillBytePresent;
+ ESDRecord::getFillBytePresent(EdEsdRecord, FillBytePresent);
+ uint8_t FillByte = '\0';
+ if (FillBytePresent)
+ ESDRecord::getFillByteValue(EdEsdRecord, FillByte);
+
+ // Initialize section with fill byte.
+ auto DataPtr =
+ std::make_pair(SectionSize, std::make_unique<uint8_t[]>(SectionSize));
+ uint8_t *Data = DataPtr.second.get();
+ memset(Data, FillByte, SectionSize);
+
+ // Replace section with content from text records.
+ for (const uint8_t *TxtRecordInt : TextPtrs) {
+ const uint8_t *TxtRecordPtr = TxtRecordInt;
+ uint32_t TxtEsdId;
+ TXTRecord::getElementEsdId(TxtRecordPtr, TxtEsdId);
+ LLVM_DEBUG(dbgs() << "Got txt EsdId: " << TxtEsdId << '\n');
+
+ if (TxtEsdId != DefEsdId)
+ continue;
+
+ uint32_t TxtDataOffset;
+ TXTRecord::getOffset(TxtRecordPtr, TxtDataOffset);
+
+ uint16_t TxtDataSize;
+ TXTRecord::getDataLength(TxtRecordPtr, TxtDataSize);
+
+ LLVM_DEBUG(dbgs() << "Record offset " << TxtDataOffset << ", data size "
+ << TxtDataSize << "\n");
+
+ SmallString<256> CompleteData;
+ CompleteData.reserve(TxtDataSize);
+ if (auto Err = TXTRecord::getData(TxtRecordPtr, CompleteData))
+ return std::move(Err);
+ assert(CompleteData.size() == TxtDataSize && "Wrong length of data");
+ memcpy(Data + TxtDataOffset, CompleteData.data(), TxtDataSize);
+ }
+
+ SectionDataCache[Sec.d.a] = std::move(DataPtr);
+ return ArrayRef<uint8_t>(Data, SectionSize);
+}
+
+uint64_t GOFFObjectFile::getSectionAlignment(DataRefImpl Sec) const {
+ const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
+ GOFF::ESDAlignment Pow2Alignment;
+ ESDRecord::getAlignment(EsdRecord, Pow2Alignment);
+ return 1 << (uint64_t)Pow2Alignment;
+}
+
+bool GOFFObjectFile::isSectionText(DataRefImpl Sec) const {
+ const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
+ GOFF::ESDExecutable Executable;
+ ESDRecord::getExecutable(EsdRecord, Executable);
+ return Executable == GOFF::ESD_EXE_CODE;
+}
+
+bool GOFFObjectFile::isSectionData(DataRefImpl Sec) const {
+ const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
+ GOFF::ESDExecutable Executable;
+ ESDRecord::getExecutable(EsdRecord, Executable);
+ return Executable == GOFF::ESD_EXE_DATA;
+}
+
+bool GOFFObjectFile::isSectionNoLoad(DataRefImpl Sec) const {
+ const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
+ GOFF::ESDLoadingBehavior LoadingBehavior;
+ ESDRecord::getLoadingBehavior(EsdRecord, LoadingBehavior);
+ return LoadingBehavior == GOFF::ESD_LB_NoLoad;
+}
+
+bool GOFFObjectFile::isSectionReadOnlyData(DataRefImpl Sec) const {
+ if (!isSectionData(Sec))
+ return false;
+
+ const uint8_t *EsdRecord = getSectionEdEsdRecord(Sec);
+ GOFF::ESDLoadingBehavior LoadingBehavior;
+ ESDRecord::getLoadingBehavior(EsdRecord, LoadingBehavior);
+ return LoadingBehavior == GOFF::ESD_LB_Initial;
+}
+
+bool GOFFObjectFile::isSectionZeroInit(DataRefImpl Sec) const {
+ // GOFF uses fill characters and fill characters are applied
+ // on getSectionContents() - so we say false to zero init.
+ return false;
+}
+
section_iterator GOFFObjectFile::section_begin() const {
DataRefImpl Sec;
moveSectionNext(Sec);
@@ -476,6 +643,13 @@ Error ESDRecord::getData(const uint8_t *Record,
return getContinuousData(Record, DataSize, 72, CompleteData);
}
+Error TXTRecord::getData(const uint8_t *Record,
+ SmallString<256> &CompleteData) {
+ uint16_t Length;
+ getDataLength(Record, Length);
+ return getContinuousData(Record, Length, 24, CompleteData);
+}
+
Error ENDRecord::getData(const uint8_t *Record,
SmallString<256> &CompleteData) {
uint16_t Length = getNameLength(Record);
diff --git a/llvm/unittests/Object/GOFFObjectFileTest.cpp b/llvm/unittests/Object/GOFFObjectFileTest.cpp
index 734dac6b8507a..69f60d016a808 100644
--- a/llvm/unittests/Object/GOFFObjectFileTest.cpp
+++ b/llvm/unittests/Object/GOFFObjectFileTest.cpp
@@ -502,3 +502,100 @@ TEST(GOFFObjectFileTest, InvalidERSymbolType) {
FailedWithMessage("ESD record 1 has unknown Executable type 0x03"));
}
}
+
+TEST(GOFFObjectFileTest, TXTConstruct) {
+ char GOFFData[GOFF::RecordLength * 6] = {};
+
+ // HDR record.
+ GOFFData[0] = 0x03;
+ GOFFData[1] = 0xF0;
+ GOFFData[50] = 0x01;
+
+ // ESD record.
+ GOFFData[GOFF::RecordLength] = 0x03;
+ GOFFData[GOFF::RecordLength + 7] = 0x01; // ESDID.
+ GOFFData[GOFF::RecordLength + 71] = 0x05; // Size of symbol name.
+ GOFFData[GOFF::RecordLength + 72] = 0xa5; // Symbol name is v.
+ GOFFData[GOFF::RecordLength + 73] = 0x81; // Symbol name is a.
+ GOFFData[GOFF::RecordLength + 74] = 0x99; // Symbol name is r.
+ GOFFData[GOFF::RecordLength + 75] = 0x7b; // Symbol name is #.
+ GOFFData[GOFF::RecordLength + 76] = 0x83; // Symbol name is c.
+
+ // ESD record.
+ GOFFData[GOFF::RecordLength * 2] = 0x03;
+ GOFFData[GOFF::RecordLength * 2 + 3] = 0x01;
+ GOFFData[GOFF::RecordLength * 2 + 7] = 0x02; // ESDID.
+ GOFFData[GOFF::RecordLength * 2 + 11] = 0x01; // Parent ESDID.
+ GOFFData[GOFF::RecordLength * 2 + 27] = 0x08; // Length.
+ GOFFData[GOFF::RecordLength * 2 + 40] = 0x01; // Name Space ID.
+ GOFFData[GOFF::RecordLength * 2 + 41] = 0x80;
+ GOFFData[GOFF::RecordLength * 2 + 60] = 0x04; // Size of symbol name.
+ GOFFData[GOFF::RecordLength * 2 + 61] = 0x04; // Size of symbol name.
+ GOFFData[GOFF::RecordLength * 2 + 63] = 0x0a; // Size of symbol name.
+ GOFFData[GOFF::RecordLength * 2 + 66] = 0x03; // Size of symbol name.
+ GOFFData[GOFF::RecordLength * 2 + 71] = 0x08; // Size of symbol name.
+ GOFFData[GOFF::RecordLength * 2 + 72] = 0xc3; // Symbol name is c.
+ GOFFData[GOFF::RecordLength * 2 + 73] = 0x6d; // Symbol name is _.
+ GOFFData[GOFF::RecordLength * 2 + 74] = 0xc3; // Symbol name is c.
+ GOFFData[GOFF::RecordLength * 2 + 75] = 0xd6; // Symbol name is o.
+ GOFFData[GOFF::RecordLength * 2 + 76] = 0xc4; // Symbol name is D.
+ GOFFData[GOFF::RecordLength * 2 + 77] = 0xc5; // Symbol name is E.
+ GOFFData[GOFF::RecordLength * 2 + 78] = 0xf6; // Symbol name is 6.
+ GOFFData[GOFF::RecordLength * 2 + 79] = 0xf4; // Symbol name is 4.
+
+ // ESD record.
+ GOFFData[GOFF::RecordLength * 3] = 0x03;
+ GOFFData[GOFF::RecordLength * 3 + 3] = 0x02;
+ GOFFData[GOFF::RecordLength * 3 + 7] = 0x03; // ESDID.
+ GOFFData[GOFF::RecordLength * 3 + 11] = 0x02; // Parent ESDID.
+ GOFFData[GOFF::RecordLength * 3 + 71] = 0x05; // Size of symbol name.
+ GOFFData[GOFF::RecordLength * 3 + 72] = 0xa5; // Symbol name is v.
+ GOFFData[GOFF::RecordLength * 3 + 73] = 0x81; // Symbol name is a.
+ GOFFData[GOFF::RecordLength * 3 + 74] = 0x99; // Symbol name is r.
+ GOFFData[GOFF::RecordLength * 3 + 75] = 0x7b; // Symbol name is #.
+ GOFFData[GOFF::RecordLength * 3 + 76] = 0x83; // Symbol name is c.
+
+ // TXT record.
+ GOFFData[GOFF::RecordLength * 4] = 0x03;
+ GOFFData[GOFF::RecordLength * 4 + 1] = 0x10;
+ GOFFData[GOFF::RecordLength * 4 + 7] = 0x02;
+ GOFFData[GOFF::RecordLength * 4 + 23] = 0x08; // Data Length.
+ GOFFData[GOFF::RecordLength * 4 + 24] = 0x12;
+ GOFFData[GOFF::RecordLength * 4 + 25] = 0x34;
+ GOFFData[GOFF::RecordLength * 4 + 26] = 0x56;
+ GOFFData[GOFF::RecordLength * 4 + 27] = 0x78;
+ GOFFData[GOFF::RecordLength * 4 + 28] = 0x9a;
+ GOFFData[GOFF::RecordLength * 4 + 29] = 0xbc;
+ GOFFData[GOFF::RecordLength * 4 + 30] = 0xde;
+ GOFFData[GOFF::RecordLength * 4 + 31] = 0xf0;
+
+ // END record.
+ GOFFData[GOFF::RecordLength * 5] = 0x03;
+ GOFFData[GOFF::RecordLength * 5 + 1] = 0x40;
+ GOFFData[GOFF::RecordLength * 5 + 11] = 0x06;
+
+ StringRef Data(GOFFData, GOFF::RecordLength * 6);
+
+ Expected<std::unique_ptr<ObjectFile>> GOFFObjOrErr =
+ object::ObjectFile::createGOFFObjectFile(
+ MemoryBufferRef(Data, "dummyGOFF"));
+
+ ASSERT_THAT_EXPECTED(GOFFObjOrErr, Succeeded());
+
+ GOFFObjectFile *GOFFObj = dyn_cast<GOFFObjectFile>((*GOFFObjOrErr).get());
+ auto Symbols = GOFFObj->symbols();
+ ASSERT_EQ(std::distance(Symbols.begin(), Symbols.end()), 1);
+ SymbolRef Symbol = *Symbols.begin();
+ Expected<StringRef> SymbolNameOrErr = GOFFObj->getSymbolName(Symbol);
+ ASSERT_THAT_EXPECTED(SymbolNameOrErr, Succeeded());
+ StringRef SymbolName = SymbolNameOrErr.get();
+ EXPECT_EQ(SymbolName, "var#c");
+
+ auto Sections = GOFFObj->sections();
+ ASSERT_EQ(std::distance(Sections.begin(), Sections.end()), 1);
+ SectionRef Section = *Sections.begin();
+ Expected<StringRef> SectionContent = Section.getContents();
+ ASSERT_THAT_EXPECTED(SectionContent, Succeeded());
+ StringRef Contents = SectionContent.get();
+ EXPECT_EQ(Contents, "\x12\x34\x56\x78\x9a\xbc\xde\xf0");
+}
|
ysyeda
requested review from
MaskRay,
redstar,
uweigand,
Everybody0523,
jh7370 and
kpneal
|
✅ With the latest revision this PR passed the C/C++ code formatter. |
jh7370
reviewed
Dec 14, 2023
|
Looks like some of my comments have been ignored? |
|
@jh7370 your comments should be addressed now. |
|
Does this properly handle the case where the ED for some TXT records has a positive offset? In this case that offset should be subtracted from the offsets of LD symbols, TXT records that belong to that ED, and relocations into text belonging to that ED. Text at a negative offset is discarded. Relocation fixups at resulting negative offsets are discarded, though I haven't tested to see what happens if a relocation is partially negative. |
|
If you want to experiment with EDs with positive offsets then the easiest way is probably to use generate GOFF from HLASM with multiple CSECTs. It seems like a GOFF reader should be able to handle GOFF produced by IBM's assembler. |
jh7370
reviewed
Mar 25, 2024
| std::make_pair(SectionSize, std::make_unique<uint8_t[]>(SectionSize)); | ||
| uint8_t *Data = DataPtr.second.get(); | ||
| memset(Data, FillByte, SectionSize); | ||
| SmallVector<uint8_t> Data(SectionSize, FillByte); |
There was a problem hiding this comment.
Elsewhere, you've used the version with 0 as the second template parameter, whereas here you've omitted it. Could you explain why you've decided to use each version (in review comments, not code comments)?
llvm/lib/Object/GOFFObjectFile.cpp
Outdated
| } | ||
|
|
||
| auto DataPtr = Data; |
There was a problem hiding this comment.
auto is actively impairing readability here. Don't use it. Please refer to the LLVM style guide on when it is appropriate to use auto.
I'm not really following what you're trying to achieve here, probably made worse by the fact that the name DataPtr implies a pointer, whereas Data appears to be a vector, so not a pointer.
There was a problem hiding this comment.
I removed the need for DataPtr. Previously I needed to use std::move to move the Data contents since the SmallVector in SectionDataCache had a template parameter of 0 for the size, but Data did not. This caused the operator= to not work. I removed DataPtr by using the same template parameters for SmallVector in SectionDataCache and Data. This should also answer your question above.
|
✅ With the latest revision this PR passed the Python code formatter. |
jh7370
reviewed
Mar 26, 2024
kpneal
approved these changes
Mar 26, 2024
|
@ysyeda We started seeing a test failure on the macOS bots after this change (plus a few others) landed. It seems likely that this PR caused the regression. Could you take look? |
|
Oh I missed the merger, sorry. @Everybody0523 It looks like this PR may have caused a test failure. See above. |
|
No worries, thanks for letting me know! I'll revert the PR and investigate. |
Everybody0523
added a commit
that referenced
this pull request
Mar 27, 2024
This reverts commit 009f88f. Reverting PR due to test failure.
|
I think the revert is now breaking our builds. Was this backed out correctly @Everybody0523 ? |
|
Hi Neumann @Everybody0523! |
boomanaiden154
added a commit
that referenced
this pull request
Mar 27, 2024
This finishes the revert started in aeb8628 which didn't completely back out the original patch.
|
Breaking my builds too. Looks like the functions in lines 409-506 were not backed out, and that's causing the issue. I've pushed abc270a which fixes the issue for me locally (and seems to expose another unrelated test failure). |
|
The revert is making thing clearly worse: the premerge CI is broken as well.
Can the other changes be reverted as well? |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This PR adds handling for TXT records in the GOFF reader.