r332885 - CodeGen, Driver: Start using direct split dwarf emission in clang.
Peter Collingbourne via cfe-commits
cfe-commits at lists.llvm.org
Mon May 21 13:31:59 PDT 2018
Author: pcc
Date: Mon May 21 13:31:59 2018
New Revision: 332885
URL: http://llvm.org/viewvc/llvm-project?rev=332885&view=rev
Log:
CodeGen, Driver: Start using direct split dwarf emission in clang.
Fixes PR37466.
Differential Revision: https://reviews.llvm.org/D47093
Added:
cfe/trunk/test/Misc/cc1as-split-dwarf.s
Modified:
cfe/trunk/include/clang/Driver/CC1Options.td
cfe/trunk/lib/CodeGen/BackendUtil.cpp
cfe/trunk/lib/Driver/ToolChains/Clang.cpp
cfe/trunk/test/CodeGen/split-debug-filename.c
cfe/trunk/test/Driver/split-debug.c
cfe/trunk/test/Driver/split-debug.s
cfe/trunk/tools/driver/cc1as_main.cpp
Modified: cfe/trunk/include/clang/Driver/CC1Options.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/CC1Options.td?rev=332885&r1=332884&r2=332885&view=diff
==============================================================================
--- cfe/trunk/include/clang/Driver/CC1Options.td (original)
+++ cfe/trunk/include/clang/Driver/CC1Options.td Mon May 21 13:31:59 2018
@@ -619,6 +619,8 @@ def version : Flag<["-"], "version">,
HelpText<"Print the compiler version">;
def main_file_name : Separate<["-"], "main-file-name">,
HelpText<"Main file name to use for debug info">;
+def split_dwarf_file : Separate<["-"], "split-dwarf-file">,
+ HelpText<"File name to use for split dwarf debug info output">;
}
@@ -628,8 +630,6 @@ def fexternc_nounwind : Flag<["-"], "fex
HelpText<"Assume all functions with C linkage do not unwind">;
def enable_split_dwarf : Flag<["-"], "enable-split-dwarf">,
HelpText<"Use split dwarf/Fission">;
-def split_dwarf_file : Separate<["-"], "split-dwarf-file">,
- HelpText<"File name to use for split dwarf debug info output">;
def fno_wchar : Flag<["-"], "fno-wchar">,
HelpText<"Disable C++ builtin type wchar_t">;
def fconstant_string_class : Separate<["-"], "fconstant-string-class">,
Modified: cfe/trunk/lib/CodeGen/BackendUtil.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/BackendUtil.cpp?rev=332885&r1=332884&r2=332885&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/BackendUtil.cpp (original)
+++ cfe/trunk/lib/CodeGen/BackendUtil.cpp Mon May 21 13:31:59 2018
@@ -104,7 +104,17 @@ class EmitAssemblyHelper {
///
/// \return True on success.
bool AddEmitPasses(legacy::PassManager &CodeGenPasses, BackendAction Action,
- raw_pwrite_stream &OS);
+ raw_pwrite_stream &OS, raw_pwrite_stream *DwoOS);
+
+ std::unique_ptr<llvm::ToolOutputFile> openOutputFile(StringRef Path) {
+ std::error_code EC;
+ auto F = make_unique<llvm::ToolOutputFile>(Path, EC, llvm::sys::fs::F_None);
+ if (EC) {
+ Diags.Report(diag::err_fe_unable_to_open_output) << Path << EC.message();
+ F.reset();
+ }
+ return F;
+ }
public:
EmitAssemblyHelper(DiagnosticsEngine &_Diags,
@@ -701,7 +711,8 @@ void EmitAssemblyHelper::CreateTargetMac
bool EmitAssemblyHelper::AddEmitPasses(legacy::PassManager &CodeGenPasses,
BackendAction Action,
- raw_pwrite_stream &OS) {
+ raw_pwrite_stream &OS,
+ raw_pwrite_stream *DwoOS) {
// Add LibraryInfo.
llvm::Triple TargetTriple(TheModule->getTargetTriple());
std::unique_ptr<TargetLibraryInfoImpl> TLII(
@@ -718,7 +729,7 @@ bool EmitAssemblyHelper::AddEmitPasses(l
if (CodeGenOpts.OptimizationLevel > 0)
CodeGenPasses.add(createObjCARCContractPass());
- if (TM->addPassesToEmitFile(CodeGenPasses, OS, nullptr, CGFT,
+ if (TM->addPassesToEmitFile(CodeGenPasses, OS, DwoOS, CGFT,
/*DisableVerify=*/!CodeGenOpts.VerifyModule)) {
Diags.Report(diag::err_fe_unable_to_interface_with_target);
return false;
@@ -757,7 +768,7 @@ void EmitAssemblyHelper::EmitAssembly(Ba
CodeGenPasses.add(
createTargetTransformInfoWrapperPass(getTargetIRAnalysis()));
- std::unique_ptr<raw_fd_ostream> ThinLinkOS;
+ std::unique_ptr<llvm::ToolOutputFile> ThinLinkOS, DwoOS;
switch (Action) {
case Backend_EmitNothing:
@@ -766,18 +777,12 @@ void EmitAssemblyHelper::EmitAssembly(Ba
case Backend_EmitBC:
if (CodeGenOpts.EmitSummaryIndex) {
if (!CodeGenOpts.ThinLinkBitcodeFile.empty()) {
- std::error_code EC;
- ThinLinkOS.reset(new llvm::raw_fd_ostream(
- CodeGenOpts.ThinLinkBitcodeFile, EC,
- llvm::sys::fs::F_None));
- if (EC) {
- Diags.Report(diag::err_fe_unable_to_open_output) << CodeGenOpts.ThinLinkBitcodeFile
- << EC.message();
+ ThinLinkOS = openOutputFile(CodeGenOpts.ThinLinkBitcodeFile);
+ if (!ThinLinkOS)
return;
- }
}
- PerModulePasses.add(
- createWriteThinLTOBitcodePass(*OS, ThinLinkOS.get()));
+ PerModulePasses.add(createWriteThinLTOBitcodePass(
+ *OS, ThinLinkOS ? &ThinLinkOS->os() : nullptr));
}
else
PerModulePasses.add(
@@ -790,7 +795,13 @@ void EmitAssemblyHelper::EmitAssembly(Ba
break;
default:
- if (!AddEmitPasses(CodeGenPasses, Action, *OS))
+ if (!CodeGenOpts.SplitDwarfFile.empty()) {
+ DwoOS = openOutputFile(CodeGenOpts.SplitDwarfFile);
+ if (!DwoOS)
+ return;
+ }
+ if (!AddEmitPasses(CodeGenPasses, Action, *OS,
+ DwoOS ? &DwoOS->os() : nullptr))
return;
}
@@ -819,6 +830,11 @@ void EmitAssemblyHelper::EmitAssembly(Ba
PrettyStackTraceString CrashInfo("Code generation");
CodeGenPasses.run(*TheModule);
}
+
+ if (ThinLinkOS)
+ ThinLinkOS->keep();
+ if (DwoOS)
+ DwoOS->keep();
}
static PassBuilder::OptimizationLevel mapToLevel(const CodeGenOptions &Opts) {
@@ -971,7 +987,7 @@ void EmitAssemblyHelper::EmitAssemblyWit
// create that pass manager here and use it as needed below.
legacy::PassManager CodeGenPasses;
bool NeedCodeGen = false;
- Optional<raw_fd_ostream> ThinLinkOS;
+ std::unique_ptr<llvm::ToolOutputFile> ThinLinkOS, DwoOS;
// Append any output we need to the pass manager.
switch (Action) {
@@ -981,17 +997,12 @@ void EmitAssemblyHelper::EmitAssemblyWit
case Backend_EmitBC:
if (CodeGenOpts.EmitSummaryIndex) {
if (!CodeGenOpts.ThinLinkBitcodeFile.empty()) {
- std::error_code EC;
- ThinLinkOS.emplace(CodeGenOpts.ThinLinkBitcodeFile, EC,
- llvm::sys::fs::F_None);
- if (EC) {
- Diags.Report(diag::err_fe_unable_to_open_output)
- << CodeGenOpts.ThinLinkBitcodeFile << EC.message();
+ ThinLinkOS = openOutputFile(CodeGenOpts.ThinLinkBitcodeFile);
+ if (!ThinLinkOS)
return;
- }
}
- MPM.addPass(
- ThinLTOBitcodeWriterPass(*OS, ThinLinkOS ? &*ThinLinkOS : nullptr));
+ MPM.addPass(ThinLTOBitcodeWriterPass(*OS, ThinLinkOS ? &ThinLinkOS->os()
+ : nullptr));
} else {
MPM.addPass(BitcodeWriterPass(*OS, CodeGenOpts.EmitLLVMUseLists,
CodeGenOpts.EmitSummaryIndex,
@@ -1009,7 +1020,13 @@ void EmitAssemblyHelper::EmitAssemblyWit
NeedCodeGen = true;
CodeGenPasses.add(
createTargetTransformInfoWrapperPass(getTargetIRAnalysis()));
- if (!AddEmitPasses(CodeGenPasses, Action, *OS))
+ if (!CodeGenOpts.SplitDwarfFile.empty()) {
+ DwoOS = openOutputFile(CodeGenOpts.SplitDwarfFile);
+ if (!DwoOS)
+ return;
+ }
+ if (!AddEmitPasses(CodeGenPasses, Action, *OS,
+ DwoOS ? &DwoOS->os() : nullptr))
// FIXME: Should we handle this error differently?
return;
break;
@@ -1029,6 +1046,11 @@ void EmitAssemblyHelper::EmitAssemblyWit
PrettyStackTraceString CrashInfo("Code generation");
CodeGenPasses.run(*TheModule);
}
+
+ if (ThinLinkOS)
+ ThinLinkOS->keep();
+ if (DwoOS)
+ DwoOS->keep();
}
Expected<BitcodeModule> clang::FindThinLTOModule(MemoryBufferRef MBRef) {
Modified: cfe/trunk/lib/Driver/ToolChains/Clang.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains/Clang.cpp?rev=332885&r1=332884&r2=332885&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/ToolChains/Clang.cpp (original)
+++ cfe/trunk/lib/Driver/ToolChains/Clang.cpp Mon May 21 13:31:59 2018
@@ -4802,12 +4802,6 @@ void Clang::ConstructJob(Compilation &C,
C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
}
- // Handle the debug info splitting at object creation time if we're
- // creating an object.
- // TODO: Currently only works on linux with newer objcopy.
- if (SplitDWARF && Output.getType() == types::TY_Object)
- SplitDebugInfo(getToolChain(), C, *this, JA, Args, Output, SplitDWARFOut);
-
if (Arg *A = Args.getLastArg(options::OPT_pg))
if (Args.hasArg(options::OPT_fomit_frame_pointer))
D.Diag(diag::err_drv_argument_not_allowed_with) << "-fomit-frame-pointer"
@@ -5464,19 +5458,17 @@ void ClangAs::ConstructJob(Compilation &
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
+ if (Args.hasArg(options::OPT_gsplit_dwarf) &&
+ getToolChain().getTriple().isOSLinux()) {
+ CmdArgs.push_back("-split-dwarf-file");
+ CmdArgs.push_back(SplitDebugName(Args, Input));
+ }
+
assert(Input.isFilename() && "Invalid input.");
CmdArgs.push_back(Input.getFilename());
const char *Exec = getToolChain().getDriver().getClangProgramPath();
C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
-
- // Handle the debug info splitting at object creation time if we're
- // creating an object.
- // TODO: Currently only works on linux with newer objcopy.
- if (Args.hasArg(options::OPT_gsplit_dwarf) &&
- getToolChain().getTriple().isOSLinux())
- SplitDebugInfo(getToolChain(), C, *this, JA, Args, Output,
- SplitDebugName(Args, Input));
}
// Begin OffloadBundler
Modified: cfe/trunk/test/CodeGen/split-debug-filename.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/split-debug-filename.c?rev=332885&r1=332884&r2=332885&view=diff
==============================================================================
--- cfe/trunk/test/CodeGen/split-debug-filename.c (original)
+++ cfe/trunk/test/CodeGen/split-debug-filename.c Mon May 21 13:31:59 2018
@@ -1,5 +1,8 @@
// RUN: %clang_cc1 -debug-info-kind=limited -split-dwarf-file foo.dwo -S -emit-llvm -o - %s | FileCheck %s
// RUN: %clang_cc1 -debug-info-kind=limited -enable-split-dwarf -split-dwarf-file foo.dwo -S -emit-llvm -o - %s | FileCheck --check-prefix=VANILLA %s
+// RUN: %clang_cc1 -debug-info-kind=limited -enable-split-dwarf -split-dwarf-file %t.dwo -emit-obj -o - %s | llvm-objdump -section-headers - | FileCheck --check-prefix=O %s
+// RUN: llvm-objdump -section-headers %t.dwo | FileCheck --check-prefix=DWO %s
+
int main (void) {
return 0;
}
@@ -10,3 +13,6 @@ int main (void) {
// Testing to ensure that the dwo name is not output into the compile unit if
// it's for vanilla split-dwarf rather than split-dwarf for implicit modules.
// VANILLA-NOT: splitDebugFilename
+
+// O-NOT: .dwo
+// DWO: .dwo
Modified: cfe/trunk/test/Driver/split-debug.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/split-debug.c?rev=332885&r1=332884&r2=332885&view=diff
==============================================================================
--- cfe/trunk/test/Driver/split-debug.c (original)
+++ cfe/trunk/test/Driver/split-debug.c Mon May 21 13:31:59 2018
@@ -3,8 +3,7 @@
// RUN: %clang -target x86_64-unknown-linux-gnu -gsplit-dwarf -c -### %s 2> %t
// RUN: FileCheck -check-prefix=CHECK-ACTIONS < %t %s
//
-// CHECK-ACTIONS: objcopy{{.*}}--extract-dwo{{.*}}"split-debug.dwo"
-// CHECK-ACTIONS: objcopy{{.*}}--strip-dwo{{.*}}"split-debug.o"
+// CHECK-ACTIONS: "-split-dwarf-file" "split-debug.dwo"
// RUN: %clang -target x86_64-macosx -gsplit-dwarf -c -### %s 2> %t
Modified: cfe/trunk/test/Driver/split-debug.s
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/split-debug.s?rev=332885&r1=332884&r2=332885&view=diff
==============================================================================
--- cfe/trunk/test/Driver/split-debug.s (original)
+++ cfe/trunk/test/Driver/split-debug.s Mon May 21 13:31:59 2018
@@ -3,8 +3,7 @@
// RUN: %clang -target x86_64-unknown-linux-gnu -gsplit-dwarf -c -### %s 2> %t
// RUN: FileCheck -check-prefix=CHECK-ACTIONS < %t %s
//
-// CHECK-ACTIONS: objcopy{{.*}}--extract-dwo{{.*}}"split-debug.dwo"
-// CHECK-ACTIONS: objcopy{{.*}}--strip-dwo{{.*}}"split-debug.o"
+// CHECK-ACTIONS: "-split-dwarf-file" "split-debug.dwo"
// RUN: %clang -target x86_64-macosx -gsplit-dwarf -c -### %s 2> %t
Added: cfe/trunk/test/Misc/cc1as-split-dwarf.s
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Misc/cc1as-split-dwarf.s?rev=332885&view=auto
==============================================================================
--- cfe/trunk/test/Misc/cc1as-split-dwarf.s (added)
+++ cfe/trunk/test/Misc/cc1as-split-dwarf.s Mon May 21 13:31:59 2018
@@ -0,0 +1,25 @@
+// RUN: %clang -cc1as -triple x86_64-pc-linux-gnu %s -filetype obj -o %t1 -split-dwarf-file %t2
+// RUN: llvm-objdump -s %t1 | FileCheck --check-prefix=O %s
+// RUN: llvm-objdump -s %t2 | FileCheck --check-prefix=DWO %s
+
+// O-NOT: Contents of section
+// O: Contents of section .strtab:
+// O-NOT: Contents of section
+// O: Contents of section .text:
+// O-NEXT: 0000 c3
+// O-NEXT: Contents of section .symtab:
+// O-NOT: Contents of section
+.globl main
+main:
+.Ltmp1:
+ret
+.Ltmp2:
+
+// DWO-NOT: Contents of section
+// DWO: Contents of section .strtab:
+// DWO-NOT: Contents of section
+// DWO: Contents of section .foo.dwo:
+// DWO-NEXT: 0000 01000000
+// DWO-NOT: Contents of section
+.section .foo.dwo
+.long .Ltmp2-.Ltmp1
Modified: cfe/trunk/tools/driver/cc1as_main.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/tools/driver/cc1as_main.cpp?rev=332885&r1=332884&r2=332885&view=diff
==============================================================================
--- cfe/trunk/tools/driver/cc1as_main.cpp (original)
+++ cfe/trunk/tools/driver/cc1as_main.cpp Mon May 21 13:31:59 2018
@@ -97,6 +97,7 @@ struct AssemblerInvocation {
llvm::DebugCompressionType CompressDebugSections =
llvm::DebugCompressionType::None;
std::string MainFileName;
+ std::string SplitDwarfFile;
/// @}
/// @name Frontend Options
@@ -247,6 +248,7 @@ bool AssemblerInvocation::CreateFromArgs
}
Opts.LLVMArgs = Args.getAllArgValues(OPT_mllvm);
Opts.OutputPath = Args.getLastArgValue(OPT_o);
+ Opts.SplitDwarfFile = Args.getLastArgValue(OPT_split_dwarf_file);
if (Arg *A = Args.getLastArg(OPT_filetype)) {
StringRef Name = A->getValue();
unsigned OutputType = StringSwitch<unsigned>(Name)
@@ -282,22 +284,17 @@ bool AssemblerInvocation::CreateFromArgs
}
static std::unique_ptr<raw_fd_ostream>
-getOutputStream(AssemblerInvocation &Opts, DiagnosticsEngine &Diags,
- bool Binary) {
- if (Opts.OutputPath.empty())
- Opts.OutputPath = "-";
-
+getOutputStream(StringRef Path, DiagnosticsEngine &Diags, bool Binary) {
// Make sure that the Out file gets unlinked from the disk if we get a
// SIGINT.
- if (Opts.OutputPath != "-")
- sys::RemoveFileOnSignal(Opts.OutputPath);
+ if (Path != "-")
+ sys::RemoveFileOnSignal(Path);
std::error_code EC;
auto Out = llvm::make_unique<raw_fd_ostream>(
- Opts.OutputPath, EC, (Binary ? sys::fs::F_None : sys::fs::F_Text));
+ Path, EC, (Binary ? sys::fs::F_None : sys::fs::F_Text));
if (EC) {
- Diags.Report(diag::err_fe_unable_to_open_output) << Opts.OutputPath
- << EC.message();
+ Diags.Report(diag::err_fe_unable_to_open_output) << Path << EC.message();
return nullptr;
}
@@ -342,9 +339,15 @@ static bool ExecuteAssembler(AssemblerIn
MAI->setRelaxELFRelocations(Opts.RelaxELFRelocations);
bool IsBinary = Opts.OutputType == AssemblerInvocation::FT_Obj;
- std::unique_ptr<raw_fd_ostream> FDOS = getOutputStream(Opts, Diags, IsBinary);
+ if (Opts.OutputPath.empty())
+ Opts.OutputPath = "-";
+ std::unique_ptr<raw_fd_ostream> FDOS =
+ getOutputStream(Opts.OutputPath, Diags, IsBinary);
if (!FDOS)
return true;
+ std::unique_ptr<raw_fd_ostream> DwoOS;
+ if (!Opts.SplitDwarfFile.empty())
+ DwoOS = getOutputStream(Opts.SplitDwarfFile, Diags, IsBinary);
// FIXME: This is not pretty. MCContext has a ptr to MCObjectFileInfo and
// MCObjectFileInfo needs a MCContext reference in order to initialize itself.
@@ -427,7 +430,9 @@ static bool ExecuteAssembler(AssemblerIn
MCTargetOptions MCOptions;
std::unique_ptr<MCAsmBackend> MAB(
TheTarget->createMCAsmBackend(*STI, *MRI, MCOptions));
- std::unique_ptr<MCObjectWriter> OW = MAB->createObjectWriter(*Out);
+ std::unique_ptr<MCObjectWriter> OW =
+ DwoOS ? MAB->createDwoObjectWriter(*Out, *DwoOS)
+ : MAB->createObjectWriter(*Out);
Triple T(Opts.Triple);
Str.reset(TheTarget->createMCObjectStreamer(
@@ -476,8 +481,12 @@ static bool ExecuteAssembler(AssemblerIn
FDOS.reset();
// Delete output file if there were errors.
- if (Failed && Opts.OutputPath != "-")
- sys::fs::remove(Opts.OutputPath);
+ if (Failed) {
+ if (Opts.OutputPath != "-")
+ sys::fs::remove(Opts.OutputPath);
+ if (!Opts.SplitDwarfFile.empty() && Opts.SplitDwarfFile != "-")
+ sys::fs::remove(Opts.SplitDwarfFile);
+ }
return Failed;
}
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