vasilito
cb424d7448
verify-patch-sanity.py validates every active recipe .patch has internally- consistent hunk line counts — catching the 'malformed patch at line N' failure at commit/CI/preflight time instead of hours into a cook. This cycle hit that class three times (qtwaylandscanner, sddm, xwayland), each only discovered when cookbook tried to apply the patch. Running it across the repo found 29 latent malformed patches (validated against GNU patch: e.g. relibc/P3-sysv-ipc reproduces 'malformed patch at line 22'). They were harmless only because they sit in vendored recipes (baked, not re- applied) — but would fail on any version-bump re-derivation. --fix recounts the hunk headers (body untouched) and repaired all 29. Wired into build-preflight.sh (Phase 1.0D) and redbear-ci.yml, with a unit test (test-patch-sanity.sh). Skips archived/legacy trees and unvalidatable formats (empty placeholders, bare-@@ git hunks).
245 lines
8.9 KiB
C++
245 lines
8.9 KiB
C++
//===--- DwarfCFIEHPrinter.h - DWARF-based Unwind Information Printer -----===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLVM_READOBJ_DWARFCFIEHPRINTER_H
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#define LLVM_TOOLS_LLVM_READOBJ_DWARFCFIEHPRINTER_H
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#include "llvm-readobj.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/DebugInfo/DWARF/DWARFCFIPrinter.h"
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#include "llvm/DebugInfo/DWARF/DWARFContext.h"
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#include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
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#include "llvm/DebugInfo/DWARF/DWARFDebugFrame.h"
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#include "llvm/Object/ELF.h"
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#include "llvm/Object/ELFObjectFile.h"
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#include "llvm/Object/ELFTypes.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/ScopedPrinter.h"
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#include "llvm/Support/type_traits.h"
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namespace llvm {
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namespace DwarfCFIEH {
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template <typename ELFT> class PrinterContext {
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using Elf_Shdr = typename ELFT::Shdr;
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using Elf_Phdr = typename ELFT::Phdr;
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ScopedPrinter &W;
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const object::ELFObjectFile<ELFT> &ObjF;
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void printEHFrameHdr(const Elf_Phdr *EHFramePHdr) const;
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void printEHFrame(const Elf_Shdr *EHFrameShdr) const;
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public:
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PrinterContext(ScopedPrinter &W, const object::ELFObjectFile<ELFT> &ObjF)
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: W(W), ObjF(ObjF) {}
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void printUnwindInformation() const;
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};
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template <class ELFT>
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static const typename ELFT::Shdr *
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findSectionByAddress(const object::ELFObjectFile<ELFT> &ObjF, uint64_t Addr) {
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Expected<typename ELFT::ShdrRange> SectionsOrErr =
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ObjF.getELFFile().sections();
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if (!SectionsOrErr)
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reportError(SectionsOrErr.takeError(), ObjF.getFileName());
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for (const typename ELFT::Shdr &Shdr : *SectionsOrErr)
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if (Shdr.sh_addr == Addr)
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return &Shdr;
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return nullptr;
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}
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template <typename ELFT>
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void PrinterContext<ELFT>::printUnwindInformation() const {
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const object::ELFFile<ELFT> &Obj = ObjF.getELFFile();
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Expected<typename ELFT::PhdrRange> PhdrsOrErr = Obj.program_headers();
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if (!PhdrsOrErr)
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reportError(PhdrsOrErr.takeError(), ObjF.getFileName());
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for (const Elf_Phdr &Phdr : *PhdrsOrErr) {
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if (Phdr.p_type != ELF::PT_GNU_EH_FRAME)
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continue;
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if (Phdr.p_memsz != Phdr.p_filesz)
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reportError(object::createError(
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"p_memsz does not match p_filesz for GNU_EH_FRAME"),
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ObjF.getFileName());
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printEHFrameHdr(&Phdr);
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break;
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}
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Expected<typename ELFT::ShdrRange> SectionsOrErr = Obj.sections();
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if (!SectionsOrErr)
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reportError(SectionsOrErr.takeError(), ObjF.getFileName());
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for (const Elf_Shdr &Shdr : *SectionsOrErr) {
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Expected<StringRef> NameOrErr = Obj.getSectionName(Shdr);
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if (!NameOrErr)
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reportError(NameOrErr.takeError(), ObjF.getFileName());
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if (*NameOrErr == ".eh_frame")
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printEHFrame(&Shdr);
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}
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}
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template <typename ELFT>
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void PrinterContext<ELFT>::printEHFrameHdr(const Elf_Phdr *EHFramePHdr) const {
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DictScope L(W, "EHFrameHeader");
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uint64_t EHFrameHdrAddress = EHFramePHdr->p_vaddr;
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W.startLine() << format("Address: 0x%" PRIx64 "\n", EHFrameHdrAddress);
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W.startLine() << format("Offset: 0x%" PRIx64 "\n", (uint64_t)EHFramePHdr->p_offset);
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W.startLine() << format("Size: 0x%" PRIx64 "\n", (uint64_t)EHFramePHdr->p_memsz);
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const object::ELFFile<ELFT> &Obj = ObjF.getELFFile();
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if (const Elf_Shdr *EHFrameHdr =
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findSectionByAddress(ObjF, EHFramePHdr->p_vaddr)) {
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Expected<StringRef> NameOrErr = Obj.getSectionName(*EHFrameHdr);
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if (!NameOrErr)
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reportError(NameOrErr.takeError(), ObjF.getFileName());
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W.printString("Corresponding Section", *NameOrErr);
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}
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Expected<ArrayRef<uint8_t>> Content = Obj.getSegmentContents(*EHFramePHdr);
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if (!Content)
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reportError(Content.takeError(), ObjF.getFileName());
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DataExtractor DE(*Content, ELFT::Endianness == llvm::endianness::little,
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ELFT::Is64Bits ? 8 : 4);
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DictScope D(W, "Header");
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uint64_t Offset = 0;
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auto Version = DE.getU8(&Offset);
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W.printNumber("version", Version);
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if (Version != 1)
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reportError(
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object::createError("only version 1 of .eh_frame_hdr is supported"),
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ObjF.getFileName());
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uint64_t EHFramePtrEnc = DE.getU8(&Offset);
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W.startLine() << format("eh_frame_ptr_enc: 0x%" PRIx64 "\n", EHFramePtrEnc);
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if (EHFramePtrEnc != (dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4))
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reportError(object::createError("unexpected encoding eh_frame_ptr_enc"),
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ObjF.getFileName());
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uint64_t FDECountEnc = DE.getU8(&Offset);
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W.startLine() << format("fde_count_enc: 0x%" PRIx64 "\n", FDECountEnc);
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if (FDECountEnc != dwarf::DW_EH_PE_udata4)
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reportError(object::createError("unexpected encoding fde_count_enc"),
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ObjF.getFileName());
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uint64_t TableEnc = DE.getU8(&Offset);
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W.startLine() << format("table_enc: 0x%" PRIx64 "\n", TableEnc);
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if (TableEnc != (dwarf::DW_EH_PE_datarel | dwarf::DW_EH_PE_sdata4))
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reportError(object::createError("unexpected encoding table_enc"),
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ObjF.getFileName());
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auto EHFramePtr = DE.getSigned(&Offset, 4) + EHFrameHdrAddress + 4;
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W.startLine() << format("eh_frame_ptr: 0x%" PRIx64 "\n", EHFramePtr);
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auto FDECount = DE.getUnsigned(&Offset, 4);
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W.printNumber("fde_count", FDECount);
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unsigned NumEntries = 0;
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uint64_t PrevPC = 0;
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while (Offset + 8 <= EHFramePHdr->p_memsz && NumEntries < FDECount) {
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DictScope D(W, std::string("entry ") + std::to_string(NumEntries));
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auto InitialPC = DE.getSigned(&Offset, 4) + EHFrameHdrAddress;
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W.startLine() << format("initial_location: 0x%" PRIx64 "\n", InitialPC);
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auto Address = DE.getSigned(&Offset, 4) + EHFrameHdrAddress;
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W.startLine() << format("address: 0x%" PRIx64 "\n", Address);
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if (InitialPC < PrevPC)
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reportError(object::createError("initial_location is out of order"),
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ObjF.getFileName());
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PrevPC = InitialPC;
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++NumEntries;
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}
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}
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template <typename ELFT>
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void PrinterContext<ELFT>::printEHFrame(const Elf_Shdr *EHFrameShdr) const {
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uint64_t Address = EHFrameShdr->sh_addr;
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uint64_t ShOffset = EHFrameShdr->sh_offset;
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W.startLine() << format(".eh_frame section at offset 0x%" PRIx64
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" address 0x%" PRIx64 ":\n",
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ShOffset, Address);
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W.indent();
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Expected<ArrayRef<uint8_t>> DataOrErr =
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ObjF.getELFFile().getSectionContents(*EHFrameShdr);
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if (!DataOrErr)
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reportError(DataOrErr.takeError(), ObjF.getFileName());
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// Construct DWARFDataExtractor to handle relocations ("PC Begin" fields).
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std::unique_ptr<DWARFContext> DICtx = DWARFContext::create(
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ObjF, DWARFContext::ProcessDebugRelocations::Process, nullptr);
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DWARFDataExtractor DE(
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DICtx->getDWARFObj(), DICtx->getDWARFObj().getEHFrameSection(),
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ELFT::Endianness == llvm::endianness::little, ELFT::Is64Bits ? 8 : 4);
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DWARFDebugFrame EHFrame(Triple::ArchType(ObjF.getArch()), /*IsEH=*/true,
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/*EHFrameAddress=*/Address);
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if (Error E = EHFrame.parse(DE))
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reportError(std::move(E), ObjF.getFileName());
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for (const dwarf::FrameEntry &Entry : EHFrame) {
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std::optional<uint64_t> InitialLocation;
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if (const dwarf::CIE *CIE = dyn_cast<dwarf::CIE>(&Entry)) {
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W.startLine() << format("[0x%" PRIx64 "] CIE length=%" PRIu64 "\n",
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Address + CIE->getOffset(), CIE->getLength());
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W.indent();
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W.printNumber("version", CIE->getVersion());
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W.printString("augmentation", CIE->getAugmentationString());
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W.printNumber("code_alignment_factor", CIE->getCodeAlignmentFactor());
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W.printNumber("data_alignment_factor", CIE->getDataAlignmentFactor());
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W.printNumber("return_address_register", CIE->getReturnAddressRegister());
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} else {
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const dwarf::FDE *FDE = cast<dwarf::FDE>(&Entry);
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W.startLine() << format("[0x%" PRIx64 "] FDE length=%" PRIu64
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" cie=[0x%" PRIx64 "]\n",
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Address + FDE->getOffset(), FDE->getLength(),
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Address + FDE->getLinkedCIE()->getOffset());
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W.indent();
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InitialLocation = FDE->getInitialLocation();
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W.startLine() << format("initial_location: 0x%" PRIx64 "\n",
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*InitialLocation);
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W.startLine() << format(
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"address_range: 0x%" PRIx64 " (end : 0x%" PRIx64 ")\n",
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FDE->getAddressRange(),
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FDE->getInitialLocation() + FDE->getAddressRange());
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}
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W.getOStream() << "\n";
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W.startLine() << "Program:\n";
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W.indent();
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auto DumpOpts = DIDumpOptions();
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DumpOpts.IsEH = true;
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printCFIProgram(Entry.cfis(), W.getOStream(), DumpOpts, W.getIndentLevel(),
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InitialLocation);
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W.unindent();
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W.unindent();
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W.getOStream() << "\n";
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}
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W.unindent();
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}
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} // namespace DwarfCFIEH
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} // namespace llvm
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#endif
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