[llvm] r290809 - Reapply "[CodeGen] Fix invalid DWARF info on Win64"

Keno Fischer via llvm-commits llvm-commits at lists.llvm.org
Sun Jan 1 19:00:20 PST 2017


Author: kfischer
Date: Sun Jan  1 21:00:19 2017
New Revision: 290809

URL: http://llvm.org/viewvc/llvm-project?rev=290809&view=rev
Log:
Reapply "[CodeGen] Fix invalid DWARF info on Win64"

This reapplies rL289013 (reverted in rL289014) with the fixes identified
in D21731. Should hopefully pass the buildbots this time.

Modified:
    llvm/trunk/docs/Extensions.rst
    llvm/trunk/include/llvm/MC/MCStreamer.h
    llvm/trunk/include/llvm/MC/MCWinCOFFStreamer.h
    llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
    llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
    llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
    llvm/trunk/lib/CodeGen/AsmPrinter/DIE.cpp
    llvm/trunk/lib/MC/MCAsmStreamer.cpp
    llvm/trunk/lib/MC/MCCodeView.cpp
    llvm/trunk/lib/MC/MCParser/COFFAsmParser.cpp
    llvm/trunk/lib/MC/MCStreamer.cpp
    llvm/trunk/lib/MC/WinCOFFStreamer.cpp
    llvm/trunk/test/DebugInfo/X86/ref_addr_relocation.ll

Modified: llvm/trunk/docs/Extensions.rst
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/Extensions.rst?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/docs/Extensions.rst (original)
+++ llvm/trunk/docs/Extensions.rst Sun Jan  1 21:00:19 2017
@@ -67,7 +67,7 @@ the target.  It corresponds to the COFF
     .long 4
     .long 242
     .long 40
-    .secrel32 _function_name
+    .secrel32 _function_name + 0
     .secidx   _function_name
     ...
 

Modified: llvm/trunk/include/llvm/MC/MCStreamer.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/MC/MCStreamer.h?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/include/llvm/MC/MCStreamer.h (original)
+++ llvm/trunk/include/llvm/MC/MCStreamer.h Sun Jan  1 21:00:19 2017
@@ -475,7 +475,7 @@ public:
   /// \brief Emits a COFF section relative relocation.
   ///
   /// \param Symbol - Symbol the section relative relocation should point to.
-  virtual void EmitCOFFSecRel32(MCSymbol const *Symbol);
+  virtual void EmitCOFFSecRel32(MCSymbol const *Symbol, uint64_t Offset);
 
   /// \brief Emit an ELF .size directive.
   ///

Modified: llvm/trunk/include/llvm/MC/MCWinCOFFStreamer.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/MC/MCWinCOFFStreamer.h?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/include/llvm/MC/MCWinCOFFStreamer.h (original)
+++ llvm/trunk/include/llvm/MC/MCWinCOFFStreamer.h Sun Jan  1 21:00:19 2017
@@ -52,7 +52,7 @@ public:
   void EndCOFFSymbolDef() override;
   void EmitCOFFSafeSEH(MCSymbol const *Symbol) override;
   void EmitCOFFSectionIndex(MCSymbol const *Symbol) override;
-  void EmitCOFFSecRel32(MCSymbol const *Symbol) override;
+  void EmitCOFFSecRel32(MCSymbol const *Symbol, uint64_t Offset) override;
   void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
                         unsigned ByteAlignment) override;
   void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,

Modified: llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp Sun Jan  1 21:00:19 2017
@@ -1689,7 +1689,9 @@ void AsmPrinter::EmitLabelPlusOffset(con
                                      unsigned Size,
                                      bool IsSectionRelative) const {
   if (MAI->needsDwarfSectionOffsetDirective() && IsSectionRelative) {
-    OutStreamer->EmitCOFFSecRel32(Label);
+    OutStreamer->EmitCOFFSecRel32(Label, Offset);
+    if (Size > 4)
+      OutStreamer->EmitZeros(Size - 4);
     return;
   }
 

Modified: llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinterDwarf.cpp Sun Jan  1 21:00:19 2017
@@ -149,7 +149,7 @@ void AsmPrinter::emitDwarfSymbolReferenc
   if (!ForceOffset) {
     // On COFF targets, we have to emit the special .secrel32 directive.
     if (MAI->needsDwarfSectionOffsetDirective()) {
-      OutStreamer->EmitCOFFSecRel32(Label);
+      OutStreamer->EmitCOFFSecRel32(Label, /*Offset=*/0);
       return;
     }
 

Modified: llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/CodeViewDebug.cpp Sun Jan  1 21:00:19 2017
@@ -801,7 +801,7 @@ void CodeViewDebug::emitDebugInfoForFunc
     OS.AddComment("Function type index");
     OS.EmitIntValue(getFuncIdForSubprogram(GV->getSubprogram()).getIndex(), 4);
     OS.AddComment("Function section relative address");
-    OS.EmitCOFFSecRel32(Fn);
+    OS.EmitCOFFSecRel32(Fn, /*Offset=*/0);
     OS.AddComment("Function section index");
     OS.EmitCOFFSectionIndex(Fn);
     OS.AddComment("Flags");
@@ -2279,7 +2279,7 @@ void CodeViewDebug::emitDebugInfoForGlob
   OS.AddComment("Type");
   OS.EmitIntValue(getCompleteTypeIndex(DIGV->getType()).getIndex(), 4);
   OS.AddComment("DataOffset");
-  OS.EmitCOFFSecRel32(GVSym);
+  OS.EmitCOFFSecRel32(GVSym, /*Offset=*/0);
   OS.AddComment("Segment");
   OS.EmitCOFFSectionIndex(GVSym);
   OS.AddComment("Name");

Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DIE.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DIE.cpp?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DIE.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DIE.cpp Sun Jan  1 21:00:19 2017
@@ -495,7 +495,8 @@ void DIELabel::EmitValue(const AsmPrinte
   AP->EmitLabelReference(Label, SizeOf(AP, Form),
                          Form == dwarf::DW_FORM_strp ||
                              Form == dwarf::DW_FORM_sec_offset ||
-                             Form == dwarf::DW_FORM_ref_addr);
+                             Form == dwarf::DW_FORM_ref_addr ||
+                             Form == dwarf::DW_FORM_data4);
 }
 
 /// SizeOf - Determine size of label value in bytes.
@@ -642,7 +643,7 @@ void DIEEntry::EmitValue(const AsmPrinte
       MCSection *Section = Unit->getSection();
       if (Section) {
         const MCSymbol *SectionSym = Section->getBeginSymbol();
-        AP->EmitLabelPlusOffset(SectionSym, Addr, SizeOf(AP, Form));
+        AP->EmitLabelPlusOffset(SectionSym, Addr, SizeOf(AP, Form), true);
         return;
       }
     }

Modified: llvm/trunk/lib/MC/MCAsmStreamer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCAsmStreamer.cpp?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCAsmStreamer.cpp (original)
+++ llvm/trunk/lib/MC/MCAsmStreamer.cpp Sun Jan  1 21:00:19 2017
@@ -150,7 +150,7 @@ public:
   void EndCOFFSymbolDef() override;
   void EmitCOFFSafeSEH(MCSymbol const *Symbol) override;
   void EmitCOFFSectionIndex(MCSymbol const *Symbol) override;
-  void EmitCOFFSecRel32(MCSymbol const *Symbol) override;
+  void EmitCOFFSecRel32(MCSymbol const *Symbol, uint64_t Offset) override;
   void emitELFSize(MCSymbol *Symbol, const MCExpr *Value) override;
   void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
                         unsigned ByteAlignment) override;
@@ -617,9 +617,11 @@ void MCAsmStreamer::EmitCOFFSectionIndex
   EmitEOL();
 }
 
-void MCAsmStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+void MCAsmStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol, uint64_t Offset) {
   OS << "\t.secrel32\t";
   Symbol->print(OS, MAI);
+  if (Offset != 0)
+    OS << '+' << Offset;
   EmitEOL();
 }
 

Modified: llvm/trunk/lib/MC/MCCodeView.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCCodeView.cpp?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCCodeView.cpp (original)
+++ llvm/trunk/lib/MC/MCCodeView.cpp Sun Jan  1 21:00:19 2017
@@ -200,7 +200,7 @@ void CodeViewContext::emitLineTableForFu
   OS.EmitIntValue(unsigned(ModuleSubstreamKind::Lines), 4);
   OS.emitAbsoluteSymbolDiff(LineEnd, LineBegin, 4);
   OS.EmitLabel(LineBegin);
-  OS.EmitCOFFSecRel32(FuncBegin);
+  OS.EmitCOFFSecRel32(FuncBegin, /*Offset=*/0);
   OS.EmitCOFFSectionIndex(FuncBegin);
 
   // Actual line info.

Modified: llvm/trunk/lib/MC/MCParser/COFFAsmParser.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCParser/COFFAsmParser.cpp?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCParser/COFFAsmParser.cpp (original)
+++ llvm/trunk/lib/MC/MCParser/COFFAsmParser.cpp Sun Jan  1 21:00:19 2017
@@ -455,13 +455,26 @@ bool COFFAsmParser::ParseDirectiveSecRel
   if (getParser().parseIdentifier(SymbolID))
     return TokError("expected identifier in directive");
 
+  int64_t Offset = 0;
+  SMLoc OffsetLoc;
+  if (getLexer().is(AsmToken::Plus)) {
+    OffsetLoc = getLexer().getLoc();
+    if (getParser().parseAbsoluteExpression(Offset))
+      return true;
+  }
+
   if (getLexer().isNot(AsmToken::EndOfStatement))
     return TokError("unexpected token in directive");
 
+  if (Offset < 0 || Offset > UINT32_MAX)
+    return Error(OffsetLoc,
+                 "invalid '.secrel32' directive offset, can't be less "
+                 "than zero or greater than UINT32_MAX");
+
   MCSymbol *Symbol = getContext().getOrCreateSymbol(SymbolID);
 
   Lex();
-  getStreamer().EmitCOFFSecRel32(Symbol);
+  getStreamer().EmitCOFFSecRel32(Symbol, Offset);
   return false;
 }
 

Modified: llvm/trunk/lib/MC/MCStreamer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCStreamer.cpp?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCStreamer.cpp (original)
+++ llvm/trunk/lib/MC/MCStreamer.cpp Sun Jan  1 21:00:19 2017
@@ -125,7 +125,7 @@ void MCStreamer::EmitSymbolValue(const M
   if (!IsSectionRelative)
     EmitValueImpl(MCSymbolRefExpr::create(Sym, getContext()), Size);
   else
-    EmitCOFFSecRel32(Sym);
+    EmitCOFFSecRel32(Sym, /*Offset=*/0);
 }
 
 void MCStreamer::EmitDTPRel64Value(const MCExpr *Value) {
@@ -689,8 +689,7 @@ void MCStreamer::EmitCOFFSafeSEH(MCSymbo
 void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
 }
 
-void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
-}
+void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol, uint64_t Offset) {}
 
 /// EmitRawText - If this file is backed by an assembly streamer, this dumps
 /// the specified string in the output .s file.  This capability is

Modified: llvm/trunk/lib/MC/WinCOFFStreamer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/WinCOFFStreamer.cpp?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/lib/MC/WinCOFFStreamer.cpp (original)
+++ llvm/trunk/lib/MC/WinCOFFStreamer.cpp Sun Jan  1 21:00:19 2017
@@ -195,11 +195,20 @@ void MCWinCOFFStreamer::EmitCOFFSectionI
   DF->getContents().resize(DF->getContents().size() + 2, 0);
 }
 
-void MCWinCOFFStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+void MCWinCOFFStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol,
+                                         uint64_t Offset) {
   MCDataFragment *DF = getOrCreateDataFragment();
-  const MCSymbolRefExpr *SRE = MCSymbolRefExpr::create(Symbol, getContext());
-  MCFixup Fixup = MCFixup::create(DF->getContents().size(), SRE, FK_SecRel_4);
+  // Create Symbol A for the relocation relative reference.
+  const MCExpr *MCE = MCSymbolRefExpr::create(Symbol, getContext());
+  // Add the constant offset, if given.
+  if (Offset)
+    MCE = MCBinaryExpr::createAdd(
+        MCE, MCConstantExpr::create(Offset, getContext()), getContext());
+  // Build the secrel32 relocation.
+  MCFixup Fixup = MCFixup::create(DF->getContents().size(), MCE, FK_SecRel_4);
+  // Record the relocation.
   DF->getFixups().push_back(Fixup);
+  // Emit 4 bytes (zeros) to the object file.
   DF->getContents().resize(DF->getContents().size() + 4, 0);
 }
 

Modified: llvm/trunk/test/DebugInfo/X86/ref_addr_relocation.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/DebugInfo/X86/ref_addr_relocation.ll?rev=290809&r1=290808&r2=290809&view=diff
==============================================================================
--- llvm/trunk/test/DebugInfo/X86/ref_addr_relocation.ll (original)
+++ llvm/trunk/test/DebugInfo/X86/ref_addr_relocation.ll Sun Jan  1 21:00:19 2017
@@ -1,10 +1,22 @@
-; RUN: llc -filetype=asm -O0 -mtriple=x86_64-linux-gnu < %s | FileCheck %s
-; RUN: llc -filetype=obj -O0 %s -mtriple=x86_64-linux-gnu -o %t
-; RUN: llvm-dwarfdump %t | FileCheck %s -check-prefix=CHECK-DWARF
-
-; RUN: llc -filetype=asm -O0 -mtriple=x86_64-apple-darwin < %s | FileCheck --check-prefix=DARWIN-ASM %s
-; RUN: llc -filetype=obj %s -mtriple=x86_64-apple-darwin -o %t2
-; RUN: llvm-dwarfdump %t2 | FileCheck %s -check-prefix=DARWIN-DWARF
+; RUN: llc -filetype=asm -O0 -mtriple=x86_64-linux-gnu < %s -dwarf-version 2 | FileCheck -check-prefixes=CHECK,ELF-ASM %s
+; RUN: llc -filetype=obj -O0 %s -mtriple=x86_64-linux-gnu -o %t-2 -dwarf-version 2
+; RUN: llvm-dwarfdump %t-2 | FileCheck %s -check-prefix=CHECK-DWARF
+; RUN: llc -filetype=obj -O0 %s -mtriple=x86_64-linux-gnu -o %t-4 -dwarf-version 2
+; RUN: llvm-dwarfdump %t-4 | FileCheck %s -check-prefix=CHECK-DWARF
+
+; RUN: llc -filetype=asm -O0 -mtriple=x86_64-apple-darwin < %s -dwarf-version 2 | FileCheck -check-prefixes=CHECK,DARWIN-ASM2 %s
+; RUN: llc -filetype=asm -O0 -mtriple=x86_64-apple-darwin < %s -dwarf-version 4 | FileCheck -check-prefixes=CHECK,DARWIN-ASM4 %s
+; RUN: llc -filetype=obj %s -mtriple=x86_64-apple-darwin -o %t2-2 -dwarf-version 2
+; RUN: llvm-dwarfdump %t2-2 | FileCheck %s -check-prefix=CHECK-DWARF
+; RUN: llc -filetype=obj %s -mtriple=x86_64-apple-darwin -o %t2-4 -dwarf-version 4
+; RUN: llvm-dwarfdump %t2-4 | FileCheck %s -check-prefix=CHECK-DWARF
+
+; RUN: llc -filetype=asm -O0 -mtriple=x86_64-pc-win32 < %s -dwarf-version 2 | FileCheck -check-prefixes=CHECK,COFF-ASM %s
+; RUN: llc -filetype=asm -O0 -mtriple=x86_64-pc-win32 < %s -dwarf-version 4 | FileCheck -check-prefixes=CHECK,COFF-ASM %s
+; RUN: llc -filetype=obj -O0 %s -mtriple=x86_64-pc-win32 -o %t3-2 -dwarf-version 2
+; RUN: llvm-dwarfdump %t3-2 | FileCheck %s -check-prefix=CHECK-DWARF2
+; RUN: llc -filetype=obj -O0 %s -mtriple=x86_64-pc-win32 -o %t3-4 -dwarf-version 4
+; RUN: llvm-dwarfdump %t3-4 | FileCheck %s -check-prefix=CHECK-DWARF
 
 ; Testing case generated from:
 ; clang++ tu1.cpp tu2.cpp -g -emit-llvm -c
@@ -22,7 +34,10 @@
 ; Make sure we use relocation for ref_addr on non-darwin platforms.
 ; CHECK: DW_TAG_compile_unit
 ; CHECK: DW_TAG_variable
-; CHECK: .long [[TYPE:.*]] # DW_AT_type
+; ELF-ASM: .long [[TYPE:.*]] # DW_AT_type
+; DARWIN-ASM2: .long [[TYPE:.*]] ## DW_AT_type
+; DARWIN-ASM4: .long [[TYPE:.*]] ## DW_AT_type
+; COFF-ASM: .long [[TYPE:.*]] # DW_AT_type
 ; CHECK: DW_TAG_structure_type
 ; CHECK: cu_begin1
 ; CHECK: DW_TAG_compile_unit
@@ -30,25 +45,24 @@
 ; This variable's type is in the 1st CU.
 ; CHECK: DW_TAG_variable
 ; Make sure this is relocatable.
-; CHECK: .quad .Lsection_info+[[TYPE]] # DW_AT_type
+; and test that we don't create the labels to emit a correct COFF relocation
+; ELF-ASM: .quad .Lsection_info+[[TYPE]] # DW_AT_type
+; COFF-ASM: .secrel32 .Lsection_info+[[TYPE]] # DW_AT_type
+; DARWIN-ASM2: .quad [[TYPE]] ## DW_AT_type
+; DARWIN-ASM4: .long [[TYPE]] ## DW_AT_type
 ; CHECK-NOT: DW_TAG_structure_type
 ; CHECK: .section
 
-; test that we don't create useless labels
-; DARWIN-ASM: .long [[TYPE:.*]] ## DW_AT_type
-; DARWIN-ASM: .quad [[TYPE]] ## DW_AT_type
-
 ; CHECK-DWARF: DW_TAG_compile_unit
 ; CHECK-DWARF: 0x[[ADDR:.*]]: DW_TAG_structure_type
 ; CHECK-DWARF: DW_TAG_compile_unit
 ; CHECK-DWARF: DW_TAG_variable
 ; CHECK-DWARF: DW_AT_type [DW_FORM_ref_addr] {{.*}}[[ADDR]])
 
-; DARWIN-DWARF: DW_TAG_compile_unit
-; DARWIN-DWARF: 0x[[ADDR:.*]]: DW_TAG_structure_type
-; DARWIN-DWARF: DW_TAG_compile_unit
-; DARWIN-DWARF: DW_TAG_variable
-; DARWIN-DWARF: DW_AT_type [DW_FORM_ref_addr] {{.*}}[[ADDR]])
+; CHECK-DWARF2: DW_TAG_compile_unit
+; CHECK-DWARF2: DW_TAG_variable
+; CHECK-DWARF2: DW_AT_type [DW_FORM_ref4] {{.*}} => {[[ADDR:.*]]})
+; CHECK-DWARF2: [[ADDR]]: DW_TAG_structure_type
 
 source_filename = "test/DebugInfo/X86/ref_addr_relocation.ll"
 




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