--- /dev/null
+RUN: llvm-dwp %p/../Inputs/simple/a.dwo %p/../Inputs/simple/b.dwo -o %t
+RUN: llvm-dwarfdump %t | FileCheck %s
+
+FIXME: For some reason, piping straight from llvm-dwp to llvm-dwarfdump doesn't behave well - looks like dwarfdump is reading/closes before dwp has finished.
+
+DWP from non-type-unit debug info for these two translation units:
+a.cpp:
+ struct foo { };
+ foo a;
+
+b.cpp:
+ struct bar { };
+ void b(bar) {
+ }
+
+CHECK: .debug_abbrev.dwo contents:
+CHECK: Abbrev table for offset: 0x00000000
+CHECK: DW_TAG_compile_unit
+CHECK: DW_TAG_variable
+CHECK: DW_TAG_structure_type
+CHECK: Abbrev table for offset: 0x00000031
+CHECK: DW_TAG_compile_unit
+CHECK: DW_TAG_structure_type
+CHECK: DW_TAG_subprogram
+CHECK: DW_TAG_formal_parameter
+
+CHECK: .debug_info.dwo contents:
+CHECK: 0x00000000: Compile Unit: length = 0x00000025 version = 0x0004 abbr_offset = 0x0000 addr_size = 0x08 (next unit at 0x00000029)
+CHECK: DW_TAG_compile_unit
+CHECK: DW_AT_name {{.*}} "a.cpp"
+CHECK: DW_TAG_variable
+CHECK: DW_AT_name {{.*}} "a"
+CHECK: DW_TAG_structure_type
+CHECK: DW_AT_name {{.*}} "foo"
+
+FIXME: Using cu_index, identify that abbr_offset is 0x0031, not 0x0000
+CHECK: 0x00000029: Compile Unit: length = 0x00000031 version = 0x0004 abbr_offset = 0x0000 addr_size = 0x08 (next unit at 0x0000005e)
+FIXME: Using cu_index, use strings based on the right str index offset
+CHECK: DW_AT_name {{.*}} "a.cpp"
+FIXME: Using cu_index to find the right abbrevs at abbr_offset, this abbrevation should actually be structure_type
+CHECK: DW_TAG_variable
+
+CHECK: .debug_cu_index contents:
+FIXME: Emit and verify the cu_index contents
+
+CHECK: .debug_str.dwo contents:
+CHECK: "clang version
+CHECK: 0x[[ACPP:.*]]: "a.cpp"
+FIXME: Remove duplicates
+CHECK: "clang version
+CHECK: 0x[[BCPP:.*]]: "b.cpp"
+
+CHECK: .debug_str_offsets.dwo contents:
+CHECK: : 00000000
+CHECK: : [[ACPP]]
+CHECK: : 00000000
+FIXME: Update str offset indexes, this should be BCPP \/
+CHECK: : [[ACPP]]
-int main() {
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/StringSet.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInstrInfo.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCSectionELF.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/Support/Options.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Support/TargetSelect.h"
+#include <memory>
+#include <list>
+#include <unordered_set>
+
+using namespace llvm;
+using namespace cl;
+
+OptionCategory DwpCategory("Specific Options");
+static list<std::string> InputFiles(Positional, OneOrMore,
+ desc("<input files>"), cat(DwpCategory));
+
+static opt<std::string> OutputFilename(Required, "o", desc("Specify the output file."),
+ value_desc("filename"), cat(DwpCategory));
+
+static int error(const Twine &Error, const Twine &Context) {
+ errs() << Twine("while processing ") + Context + ":\n";
+ errs() << Twine("error: ") + Error + "\n";
+ return 1;
+}
+
+static std::error_code writeSection(MCStreamer &Out, MCSection *OutSection,
+ const object::SectionRef &Sym) {
+ StringRef Contents;
+ if (auto Err = Sym.getContents(Contents))
+ return Err;
+ Out.SwitchSection(OutSection);
+ Out.EmitBytes(Contents);
+ return std::error_code();
+}
+
+static std::error_code write(MCStreamer &Out, ArrayRef<std::string> Inputs) {
+ for (const auto &Input : Inputs) {
+ auto ErrOrObj = object::ObjectFile::createObjectFile(Input);
+ if (!ErrOrObj)
+ return ErrOrObj.getError();
+ const auto *Obj = ErrOrObj->getBinary();
+ for (const auto &Section : Obj->sections()) {
+ const auto &MCOFI = *Out.getContext().getObjectFileInfo();
+ static const StringMap<MCSection *> KnownSections = {
+ {"debug_info.dwo", MCOFI.getDwarfInfoDWOSection()},
+ {"debug_types.dwo", MCOFI.getDwarfTypesDWOSection()},
+ {"debug_str_offsets.dwo", MCOFI.getDwarfStrOffDWOSection()},
+ {"debug_str.dwo", MCOFI.getDwarfStrDWOSection()},
+ {"debug_loc.dwo", MCOFI.getDwarfLocDWOSection()},
+ {"debug_abbrev.dwo", MCOFI.getDwarfAbbrevDWOSection()}};
+ StringRef Name;
+ if (std::error_code Err = Section.getName(Name))
+ return Err;
+ if (MCSection *OutSection =
+ KnownSections.lookup(Name.substr(Name.find_first_not_of("._"))))
+ if (auto Err = writeSection(Out, OutSection, Section))
+ return Err;
+ }
+ }
+ return std::error_code();
+}
+
+int main(int argc, char** argv) {
+
+ ParseCommandLineOptions(argc, argv, "merge split dwarf (.dwo) files");
+
+ llvm::InitializeAllTargetInfos();
+ llvm::InitializeAllTargetMCs();
+ llvm::InitializeAllTargets();
+ llvm::InitializeAllAsmPrinters();
+
+ std::string ErrorStr;
+ StringRef Context = "dwarf streamer init";
+
+ Triple TheTriple("x86_64-linux-gnu");
+
+ // Get the target.
+ const Target *TheTarget =
+ TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
+ if (!TheTarget)
+ return error(ErrorStr, Context);
+ std::string TripleName = TheTriple.getTriple();
+
+ // Create all the MC Objects.
+ std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
+ if (!MRI)
+ return error(Twine("no register info for target ") + TripleName, Context);
+
+ std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
+ if (!MAI)
+ return error("no asm info for target " + TripleName, Context);
+
+ MCObjectFileInfo MOFI;
+ MCContext MC(MAI.get(), MRI.get(), &MOFI);
+ MOFI.InitMCObjectFileInfo(TheTriple, Reloc::Default, CodeModel::Default,
+ MC);
+
+ auto MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, "");
+ if (!MAB)
+ return error("no asm backend for target " + TripleName, Context);
+
+ std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());
+ if (!MII)
+ return error("no instr info info for target " + TripleName, Context);
+
+ std::unique_ptr<MCSubtargetInfo> MSTI(
+ TheTarget->createMCSubtargetInfo(TripleName, "", ""));
+ if (!MSTI)
+ return error("no subtarget info for target " + TripleName, Context);
+
+ MCCodeEmitter *MCE = TheTarget->createMCCodeEmitter(*MII, *MRI, MC);
+ if (!MCE)
+ return error("no code emitter for target " + TripleName, Context);
+
+ // Create the output file.
+ std::error_code EC;
+ raw_fd_ostream OutFile(OutputFilename, EC, sys::fs::F_None);
+ if (EC)
+ return error(Twine(OutputFilename) + ": " + EC.message(), Context);
+
+ std::unique_ptr<MCStreamer> MS(TheTarget->createMCObjectStreamer(
+ TheTriple, MC, *MAB, OutFile, MCE, *MSTI, false,
+ /*DWARFMustBeAtTheEnd*/ false));
+ if (!MS)
+ return error("no object streamer for target " + TripleName, Context);
+
+ if (auto Err = write(*MS, InputFiles))
+ return error(Err.message(), "Writing DWP file");
+
+ MS->Finish();
}