[symbolizer] Added StartAddress for the resolved function.

[aorlov]

Summary

In many cases it is helpful to know at what address the resolved function starts.
This patch adds a new StartAddress member to the DILineInfo structure.

[jhenderson]

This seems like a reasonable idea in principle to me, and the code as-is looks good for JSON output. I feel like it shouldn't be limited to just that output format however. I'm uncertain how to represent this in other output formats, but it may want to be through a new llvm-symbolizer option (e.g. --print-start-address), or maybe even it could just be part of the verbose output (since that is where the StartLine output is printed. What do you think?

llvm/lib/DebugInfo/DWARF/DWARFContext.cpp

1067–1069

No need for braces for single-line if statements.

[aorlov]

it could just be part of the verbose output (since that is where the StartLine output is printed.

I like this more. Feels like we already have enough options.

What about compatibility with gnu adr2line? Unless I’m missing something, they do not offer such data. Do we care?

[dblaikie]

llvm/lib/DebugInfo/DWARF/DWARFContext.cpp

1067–1069

Any thoughts on the behavior you want if a function has more than one code range (eg: PROPELLER or other uses of basic block sections - where the function will described with DW_AT_ranges instead of DW_AT_low_pc)?

[jhenderson]

In D102316#2757821, @aorlov wrote:

it could just be part of the verbose output (since that is where the StartLine output is printed.

I like this more. Feels like we already have enough options.

What about compatibility with gnu adr2line? Unless I’m missing something, they do not offer such data. Do we care?

We definitely care about GNU compatibility for the GNU output style. There are two options here: 1) discuss on the GNU binutils mailing list whether they'd be interested in implementing the same feature, maybe with a concrete proposal of what the output would look like - if they accept it, model our output on theirs. 2) Add the output to the LLVM-style verbose output only (also to JSON output of course).

Don't forget to update the examples (and potentially text) in the docs to match whatever the new output is.

llvm/lib/DebugInfo/DWARF/DWARFContext.cpp

1067–1069

I've got no concrete preference here currently, but I can think of the following options:

1. In such cases, don't print a StartAddress, to avoid confusion.
2. Print the start of the current block in the range.
3. Print the start of the first block (if possible), since that's technically the start address, and also the most likely entry point of the function.
4. Print the details of all ranges related to this symbol.

[dblaikie]

llvm/lib/DebugInfo/DWARF/DWARFContext.cpp

1067–1069

Yeah, I'm OK with any of that - though (3) isn't really possible with LLVM's DWARF output - the list of blocks isn't ordered, so you can't find the first one only from inspecting the address ranges. (yes, I'm pretty sure in LLVM's output the first block in the list of ranges is the start of the function, but nothing in DWARF communicates/guarantees that) - there's a separate attribute that can be emitted on subprograms that's for the entry point address which could be used for this (or you can lookup the symbol table - if the function/executable has a symbol table - and use that address)

[aorlov]

Of course I though about multiple ranges case. And preferred keeping it simple for the beginning. This patch does not print StartAddress if DW_AT_low_pc is missing. That’s the case #1 in the above list of options. As already mentioned, in case of multiple ranges we do not know for sure where a function starts, at least not without an extra analyses of the code. We will need more solid use case and samples to move to that direction. Not a subject of this patch.

To summarize.

1. I will add StartAddress to the verbose output for LLVM.
2. If/when time permits I’ll follow up with gnu community with the proposal pointing to LLVM output as an example.

The patch is coming shortly.

By the way, llvm-symbolizer always uses symbol table. Opts.UseSymbolTable = true is hard coded and user has no way to control that.

[dblaikie]

In D102316#2760395, @aorlov wrote:

Of course I though about multiple ranges case. And preferred keeping it simple for the beginning. This patch does not print StartAddress if DW_AT_low_pc is missing. That’s the case #1 in the above list of options. As already mentioned, in case of multiple ranges we do not know for sure where a function starts, at least not without an extra analyses of the code. We will need more solid use case and samples to move to that direction. Not a subject of this patch.

To summarize.

1. I will add StartAddress to the verbose output for LLVM.
2. If/when time permits I’ll follow up with gnu community with the proposal pointing to LLVM output as an example.

The patch is coming shortly.

By the way, llvm-symbolizer always uses symbol table. Opts.UseSymbolTable = true is hard coded and user has no way to control that.

Fair enough.

(re: symbol table - I meant for figuring out the address - I think the "UseSymbolTable" is for the names, not the addresses (see the comments in SymbolizableObjectFile::shouldOverrideWithSymbolTable))

[jhenderson]

Reminder:

Don't forget to update the examples (and potentially text) in the docs to match whatever the new output is.

llvm/lib/DebugInfo/Symbolize/DIPrinter.cpp

160

I feel like it would be a good idea to reduce code duplication of this function. I'd suggest pulling the common bits out into separate static or private functions, that can be called as necessary. Example:

void PlainPrinterBase::printVerbose(StringRef Filename,
                                    const DILineInfo &Info) {
  printFileAndFunctionStart(...);
  printLineColumnDiscriminator(...);
}

void LLVMPrinter::printVerbose(StringRef Filename, const DILineInfo &Info) {
  printFileAndFunctionStart(...);
  if (Info.StartAddress) {
    OS << "  Function start address: 0x";
    OS.write_hex(*Info.StartAddress);
    OS << '\n';
  }
  printLineColumnDiscriminator(...);
}

Alternatively, put the start address printing in another virtual function, and then just have the PlainPrinterBase::printVerbose function callt that function.

[jhenderson]

LGTM, thanks!

llvm/docs/CommandGuide/llvm-symbolizer.rst

377

I don't think you need the word "start" here (we didn't before for the line part after all).

llvm/docs/CommandGuide/llvm-symbolizer.rst

 .. option:: --relativenames
 
   Print the file's path relative to the compilation directory, instead
   of the absolute path. If the command-line to the compiler included
   the full path, this will be the same as the default.
 
 .. option:: --verbose
 
-  Print verbose line and column information.
+  Print verbose start address, line and column information.
 
   .. code-block:: console
 
     $ llvm-symbolizer --obj=inlined.elf --verbose 0x4004be
     baz()
       Filename: /tmp/test.cpp
       Function start line: 9
+      Function start address: 0x4004b0
       Line: 11
       Column: 18
     main
       Filename: /tmp/test.cpp
       Function start line: 14
+      Function start address: 0x4004b0
       Line: 15
       Column: 0
 
 .. option:: --version, -v
 
   Print version information for the tool.
 
 .. option:: @<FILE>

llvm/include/llvm/DebugInfo/DIContext.h

struct DILineInfo {
   static constexpr const char *const Addr2LineBadString = "??";
   std::string FileName;
   std::string FunctionName;
   std::string StartFileName;
   Optional<StringRef> Source;
   uint32_t Line = 0;
   uint32_t Column = 0;
   uint32_t StartLine = 0;
+  Optional<uint64_t> StartAddress;
 
   // DWARF-specific.
   uint32_t Discriminator = 0;
 
   DILineInfo()
       : FileName(BadString), FunctionName(BadString), StartFileName(BadString) {
   }
 

llvm/include/llvm/DebugInfo/Symbolize/DIPrinter.h

protected:
   PrinterConfig Config;
 
   void print(const DILineInfo &Info, bool Inlined);
   void printFunctionName(StringRef FunctionName, bool Inlined);
   virtual void printSimpleLocation(StringRef Filename,
                                    const DILineInfo &Info) = 0;
   void printContext(SourceCode SourceCode);
   void printVerbose(StringRef Filename, const DILineInfo &Info);
+  virtual void printStartAddress(const DILineInfo &Info) {}
   virtual void printFooter() {}
 
 private:
   void printHeader(uint64_t Address);
 
 public:
   PlainPrinterBase(raw_ostream &OS, raw_ostream &ES, PrinterConfig &Config)
       : DIPrinter(), OS(OS), ES(ES), Config(Config) {}
public:
 
   void listBegin() override {}
   void listEnd() override {}
 };
 
 class LLVMPrinter : public PlainPrinterBase {
 private:
   void printSimpleLocation(StringRef Filename, const DILineInfo &Info) override;
+  void printStartAddress(const DILineInfo &Info) override;
   void printFooter() override;
 
 public:
   LLVMPrinter(raw_ostream &OS, raw_ostream &ES, PrinterConfig &Config)
       : PlainPrinterBase(OS, ES, Config) {}
 };
 
 class GNUPrinter : public PlainPrinterBase {

llvm/lib/DebugInfo/DWARF/DWARFContext.cpp

while (!Worklist.empty()) {
     append_range(Worklist, DIE);
   }
 
   return Result;
 }
 
 /// TODO: change input parameter from "uint64_t Address"
 ///       into "SectionedAddress Address"
-static bool getFunctionNameAndStartLineForAddress(DWARFCompileUnit *CU,
-                                                  uint64_t Address,
-                                                  FunctionNameKind Kind,
-                                                  DILineInfoSpecifier::FileLineInfoKind FileNameKind,
-                                                  std::string &FunctionName,
-                                                  std::string &StartFile,
-                                                  uint32_t &StartLine) {
+static bool getFunctionNameAndStartLineForAddress(
+    DWARFCompileUnit *CU, uint64_t Address, FunctionNameKind Kind,
+    std::string &FunctionName, std::string &StartFile, uint32_t &StartLine,
+    Optional<uint64_t> &StartAddress) {
   // The address may correspond to instruction in some inlined function,
   // so we have to build the chain of inlined functions and take the
   // name of the topmost function in it.
   SmallVector<DWARFDie, 4> InlinedChain;
   CU->getInlinedChainForAddress(Address, InlinedChain);
   if (InlinedChain.empty())
     return false;
 
   const DWARFDie &DIE = InlinedChain[0];
   bool FoundResult = false;
   const char *Name = nullptr;
   if (Kind != FunctionNameKind::None && (Name = DIE.getSubroutineName(Kind))) {
     FunctionName = Name;
     FoundResult = true;
   }
   std::string DeclFile = DIE.getDeclFile(FileNameKind);
   if (!DeclFile.empty()) {
     StartFile = DeclFile;
     FoundResult = true;
   }
   if (auto DeclLineResult = DIE.getDeclLine()) {
     StartLine = DeclLineResult;
     FoundResult = true;
   }
-
+  if (auto LowPcAddr = toSectionedAddress(DIE.find(DW_AT_low_pc)))
+    StartAddress = LowPcAddr->Address;
   return FoundResult;
 }
 
 static Optional<uint64_t> getTypeSize(DWARFDie Type, uint64_t PointerSize) {
   if (auto SizeAttr = Type.find(DW_AT_byte_size))
     if (Optional<uint64_t> Size = SizeAttr->getAsUnsignedConstant())
       return Size;
 
   switch (Type.getTag()) {

 DILineInfo DWARFContext::getLineInfoForAddress(object::SectionedAddress Address,
                                                DILineInfoSpecifier Spec) {
   DILineInfo Result;
 
   DWARFCompileUnit *CU = getCompileUnitForAddress(Address.Address);
   if (!CU)
     return Result;
 
-  getFunctionNameAndStartLineForAddress(CU, Address.Address, Spec.FNKind, Spec.FLIKind,
-                                        Result.FunctionName,
-                                        Result.StartFileName, Result.StartLine);
+  getFunctionNameAndStartLineForAddress(
+      CU, Address.Address, Spec.FNKind, Spec.FLIKind, Result.FunctionName,
+      Result.StartFileName, Result.StartLine, Result.StartAddress);
   if (Spec.FLIKind != FileLineInfoKind::None) {
     if (const DWARFLineTable *LineTable = getLineTableForUnit(CU)) {
       LineTable->getFileLineInfoForAddress(
           {Address.Address, Address.SectionIndex}, CU->getCompilationDir(),
           Spec.FLIKind, Result);
     }
   }
   return Result;
 }
 
 DILineInfoTable DWARFContext::getLineInfoForAddressRange(
     object::SectionedAddress Address, uint64_t Size, DILineInfoSpecifier Spec) {
-  DILineInfoTable  Lines;
+  DILineInfoTable Lines;
   DWARFCompileUnit *CU = getCompileUnitForAddress(Address.Address);
   if (!CU)
     return Lines;
 
   uint32_t StartLine = 0;
   std::string StartFileName;
   std::string FunctionName(DILineInfo::BadString);
-  getFunctionNameAndStartLineForAddress(CU, Address.Address, Spec.FNKind, Spec.FLIKind,
-                                        FunctionName, StartFileName, StartLine);
+  Optional<uint64_t> StartAddress;
+  getFunctionNameAndStartLineForAddress(CU, Address.Address, Spec.FNKind,
+                                        Spec.FLIKind, FunctionName,
+                                        StartFileName, StartLine, StartAddress);
 
   // If the Specifier says we don't need FileLineInfo, just
   // return the top-most function at the starting address.
   if (Spec.FLIKind == FileLineInfoKind::None) {
     DILineInfo Result;
     Result.FunctionName = FunctionName;
     Result.StartFileName = StartFileName;
     Result.StartLine = StartLine;
+    Result.StartAddress = StartAddress;
     Lines.push_back(std::make_pair(Address.Address, Result));
     return Lines;
   }
 
   const DWARFLineTable *LineTable = getLineTableForUnit(CU);
 
   // Get the index of row we're looking for in the line table.
   std::vector<uint32_t> RowVector;
   if (!LineTable->lookupAddressRange({Address.Address, Address.SectionIndex},
                                      Size, RowVector)) {
     return Lines;
   }
 
   for (uint32_t RowIndex : RowVector) {
     // Take file number and line/column from the row.
     const DWARFDebugLine::Row &Row = LineTable->Rows[RowIndex];
     DILineInfo Result;
     LineTable->getFileNameByIndex(Row.File, CU->getCompilationDir(),
                                   Spec.FLIKind, Result.FileName);
     Result.FunctionName = FunctionName;
     Result.Line = Row.Line;
     Result.Column = Row.Column;
     Result.StartFileName = StartFileName;
     Result.StartLine = StartLine;
+    Result.StartAddress = StartAddress;
     Lines.push_back(std::make_pair(Row.Address.Address, Result));
   }
 
   return Lines;
 }
 
 DIInliningInfo
 DWARFContext::getInliningInfoForAddress(object::SectionedAddress Address,
for (uint32_t i = 0, n = InlinedChain.size(); i != n; i++) {
     DWARFDie &FunctionDIE = InlinedChain[i];
     DILineInfo Frame;
     // Get function name if necessary.
     if (const char *Name = FunctionDIE.getSubroutineName(Spec.FNKind))
       Frame.FunctionName = Name;
     if (auto DeclLineResult = FunctionDIE.getDeclLine())
       Frame.StartLine = DeclLineResult;
     Frame.StartFileName = FunctionDIE.getDeclFile(Spec.FLIKind);
+    if (auto LowPcAddr = toSectionedAddress(FunctionDIE.find(DW_AT_low_pc)))
+      Frame.StartAddress = LowPcAddr->Address;
     if (Spec.FLIKind != FileLineInfoKind::None) {
       if (i == 0) {
         // For the topmost frame, initialize the line table of this
         // compile unit and fetch file/line info from it.
         LineTable = getLineTableForUnit(CU);
         // For the topmost routine, get file/line info from line table.
         if (LineTable)
           LineTable->getFileLineInfoForAddress(

llvm/lib/DebugInfo/Symbolize/DIPrinter.cpp

 
 void PlainPrinterBase::printVerbose(StringRef Filename,
                                     const DILineInfo &Info) {
   OS << "  Filename: " << Filename << '\n';
   if (Info.StartLine) {
     OS << "  Function start filename: " << Info.StartFileName << '\n';
     OS << "  Function start line: " << Info.StartLine << '\n';
   }
+  printStartAddress(Info);
   OS << "  Line: " << Info.Line << '\n';
   OS << "  Column: " << Info.Column << '\n';
   if (Info.Discriminator)
     OS << "  Discriminator: " << Info.Discriminator << '\n';
 }
 
+void LLVMPrinter::printStartAddress(const DILineInfo &Info) {
+  if (Info.StartAddress) {
+    OS << "  Function start address: 0x";
+    OS.write_hex(*Info.StartAddress);
+    OS << '\n';
+  }
+}
+
 void LLVMPrinter::printFooter() { OS << '\n'; }
 
 void PlainPrinterBase::print(const DILineInfo &Info, bool Inlined) {
   printFunctionName(Info.FunctionName, Inlined);
   StringRef Filename = Info.FileName;
   if (Filename == DILineInfo::BadString)
     Filename = DILineInfo::Addr2LineBadString;
   if (Config.Verbose)
for (uint32_t I = 0, N = Info.getNumberOfFrames(); I < N; ++I) {
     Array.push_back(json::Object(
         {{"FunctionName", LineInfo.FunctionName != DILineInfo::BadString
                               ? LineInfo.FunctionName
                               : ""},
          {"StartFileName", LineInfo.StartFileName != DILineInfo::BadString
                                ? LineInfo.StartFileName
                                : ""},
          {"StartLine", LineInfo.StartLine},
+         {"StartAddress",
+          LineInfo.StartAddress ? toHex(*LineInfo.StartAddress) : ""},
          {"FileName",
           LineInfo.FileName != DILineInfo::BadString ? LineInfo.FileName : ""},
          {"Line", LineInfo.Line},
          {"Column", LineInfo.Column},
          {"Discriminator", LineInfo.Discriminator}}));
   }
   json::Object Json = toJSON(Request);
   Json["Symbol"] = std::move(Array);

llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp

SymbolizableObjectFile::symbolizeCode(object::SectionedAddress ModuleOffset,
 
   // Override function name from symbol table if necessary.
   if (shouldOverrideWithSymbolTable(LineInfoSpecifier.FNKind, UseSymbolTable)) {
     std::string FunctionName, FileName;
     uint64_t Start, Size;
     if (getNameFromSymbolTable(ModuleOffset.Address, FunctionName, Start, Size,
                                FileName)) {
       LineInfo.FunctionName = FunctionName;
+      LineInfo.StartAddress = Start;
       if (LineInfo.FileName == DILineInfo::BadString && !FileName.empty())
         LineInfo.FileName = FileName;
     }
   }
   return LineInfo;
 }
 
 DIInliningInfo SymbolizableObjectFile::symbolizeInlinedCode(
DIInliningInfo SymbolizableObjectFile::symbolizeInlinedCode(
   if (shouldOverrideWithSymbolTable(LineInfoSpecifier.FNKind, UseSymbolTable)) {
     std::string FunctionName, FileName;
     uint64_t Start, Size;
     if (getNameFromSymbolTable(ModuleOffset.Address, FunctionName, Start, Size,
                                FileName)) {
       DILineInfo *LI = InlinedContext.getMutableFrame(
           InlinedContext.getNumberOfFrames() - 1);
       LI->FunctionName = FunctionName;
+      LI->StartAddress = Start;
       if (LI->FileName == DILineInfo::BadString && !FileName.empty())
         LI->FileName = FileName;
     }
   }
 
   return InlinedContext;
 }
 

llvm/test/tools/llvm-symbolizer/output-style-json-code.test

 ## This test checks JSON output for CODE.
 
 ## If the addresses are specified on the command-line, the output JSON will
 ## contain an array of the results for all of the given addresses.
 
 ## Show how library errors are reported in the output.
 # RUN: llvm-symbolizer --output-style=JSON -e %p/no-file.exe 0 | \
 # RUN:   FileCheck %s -DMSG=%errc_ENOENT --check-prefix=NO-FILE --strict-whitespace --match-full-lines --implicit-check-not={{.}}
 # NO-FILE:[{"Address":"0x0","Error":{"Message":"[[MSG]]"},"ModuleName":"{{.*}}/no-file.exe"}]
 
 ## Resolve out of range address.
 ## Expected a list with one empty object with default values.
 # RUN: llvm-symbolizer --output-style=JSON -e %p/Inputs/addr.exe 0x10000000 | \
 # RUN:   FileCheck %s --check-prefix=NOT-FOUND --strict-whitespace --match-full-lines --implicit-check-not={{.}}
-# NOT-FOUND:[{"Address":"0x10000000","ModuleName":"{{.*}}/Inputs/addr.exe","Symbol":[{"Column":0,"Discriminator":0,"FileName":"","FunctionName":"","Line":0,"StartFileName":"","StartLine":0}]}]
+# NOT-FOUND:[{"Address":"0x10000000","ModuleName":"{{.*}}/Inputs/addr.exe","Symbol":[{"Column":0,"Discriminator":0,"FileName":"","FunctionName":"","Line":0,"StartAddress":"","StartFileName":"","StartLine":0}]}]
 
 ## Check a non-zero discriminator.
 # RUN: llvm-symbolizer --output-style=JSON --obj=%p/Inputs/discrim 0x400575 | \
 # RUN:   FileCheck %s --check-prefix=DISCRIM --strict-whitespace --match-full-lines --implicit-check-not={{.}}
-# DISCRIM:[{"Address":"0x400575","ModuleName":"{{.*}}/Inputs/discrim","Symbol":[{"Column":17,"Discriminator":2,"FileName":"/tmp{{/|\\\\}}discrim.c","FunctionName":"foo","Line":5,"StartFileName":"/tmp{{/|\\\\}}discrim.c","StartLine":4}]}]
+# DISCRIM:[{"Address":"0x400575","ModuleName":"{{.*}}/Inputs/discrim","Symbol":[{"Column":17,"Discriminator":2,"FileName":"/tmp{{/|\\\\}}discrim.c","FunctionName":"foo","Line":5,"StartAddress":"0x400560","StartFileName":"/tmp{{/|\\\\}}discrim.c","StartLine":4}]}]
 
 ## In case of stdin input the output will contain a single JSON object for each input string.
 
 ## This test case is testing stdin input, with the --no-inlines option.
 # RUN: llvm-symbolizer --output-style=JSON --no-inlines -e %p/Inputs/addr.exe < %p/Inputs/addr.inp | \
 # RUN:   FileCheck %s --check-prefix=NO-INLINES --strict-whitespace --match-full-lines --implicit-check-not={{.}}
 ## Invalid first argument before any valid one.
 # NO-INLINES:{"Error":{"Message":"unable to parse arguments: some text"},"ModuleName":"{{.*}}/Inputs/addr.exe"}
 ## Resolve valid address.
-# NO-INLINES-NEXT:{"Address":"0x40054d","ModuleName":"{{.*}}/Inputs/addr.exe","Symbol":[{"Column":3,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"main","Line":3,"StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":2}]}
+# NO-INLINES-NEXT:{"Address":"0x40054d","ModuleName":"{{.*}}/Inputs/addr.exe","Symbol":[{"Column":3,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"main","Line":3,"StartAddress":"0x400540","StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":2}]}
 ## Invalid argument after a valid one.
 # NO-INLINES-NEXT:{"Error":{"Message":"unable to parse arguments: some text2"},"ModuleName":"{{.*}}/Inputs/addr.exe"}
 
 ## This test case is testing stdin input, inlines by default.
 # RUN: llvm-symbolizer --output-style=JSON -e %p/Inputs/addr.exe < %p/Inputs/addr.inp | \
 # RUN:   FileCheck %s --check-prefix=INLINE --strict-whitespace --match-full-lines --implicit-check-not={{.}}
 ## Invalid first argument before any valid one.
 # INLINE:{"Error":{"Message":"unable to parse arguments: some text"},"ModuleName":"{{.*}}/Inputs/addr.exe"}
 ## Resolve valid address.
-# INLINE-NEXT:{"Address":"0x40054d","ModuleName":"{{.*}}/Inputs/addr.exe","Symbol":[{"Column":3,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"inctwo","Line":3,"StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":2},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"inc","Line":7,"StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":6},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"main","Line":14,"StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":12}]}
+# INLINE-NEXT:{"Address":"0x40054d","ModuleName":"{{.*}}/Inputs/addr.exe","Symbol":[{"Column":3,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"inctwo","Line":3,"StartAddress":"0x400540","StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":2},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"inc","Line":7,"StartAddress":"0x400540","StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":6},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"main","Line":14,"StartAddress":"0x400540","StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":12}]}
 ## Invalid argument after a valid one.
 # INLINE-NEXT:{"Error":{"Message":"unable to parse arguments: some text2"},"ModuleName":"{{.*}}/Inputs/addr.exe"}
 
 ## Also check the last test case with llvm-adr2line.
 ## The expected result is the same with -f -i.
 # RUN: llvm-addr2line --output-style=JSON -f -i -e %p/Inputs/addr.exe < %p/Inputs/addr.inp | \
 # RUN:   FileCheck %s --check-prefix=INLINE-A2L --strict-whitespace --match-full-lines --implicit-check-not={{.}}
 ## Invalid first argument before any valid one.
 # INLINE-A2L:{"Error":{"Message":"unable to parse arguments: some text"},"ModuleName":"{{.*}}/Inputs/addr.exe"}
 ## Resolve valid address.
-# INLINE-A2L-NEXT:{"Address":"0x40054d","ModuleName":"{{.*}}/Inputs/addr.exe","Symbol":[{"Column":3,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"inctwo","Line":3,"StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":2},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"inc","Line":7,"StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":6},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"main","Line":14,"StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":12}]}
+# INLINE-A2L-NEXT:{"Address":"0x40054d","ModuleName":"{{.*}}/Inputs/addr.exe","Symbol":[{"Column":3,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"inctwo","Line":3,"StartAddress":"0x400540","StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":2},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"inc","Line":7,"StartAddress":"0x400540","StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":6},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"main","Line":14,"StartAddress":"0x400540","StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":12}]}
 ## Invalid argument after a valid one.
 # INLINE-A2L-NEXT:{"Error":{"Message":"unable to parse arguments: some text2"},"ModuleName":"{{.*}}/Inputs/addr.exe"}
 
 ## Note llvm-addr2line without -f does not print the function name in JSON too.
 # RUN: llvm-addr2line --output-style=JSON -i -e %p/Inputs/addr.exe < %p/Inputs/addr.inp | \
 # RUN:   FileCheck %s --check-prefix=NO-FUNC-A2L --strict-whitespace --match-full-lines --implicit-check-not={{.}}
 ## Invalid first argument before any valid one.
 # NO-FUNC-A2L:{"Error":{"Message":"unable to parse arguments: some text"},"ModuleName":"{{.*}}/Inputs/addr.exe"}
 ## Resolve valid address.
-# NO-FUNC-A2L-NEXT:{"Address":"0x40054d","ModuleName":"{{.*}}/Inputs/addr.exe","Symbol":[{"Column":3,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"","Line":3,"StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":2},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"","Line":7,"StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":6},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"","Line":14,"StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":12}]}
+# NO-FUNC-A2L-NEXT:{"Address":"0x40054d","ModuleName":"{{.*}}/Inputs/addr.exe","Symbol":[{"Column":3,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"","Line":3,"StartAddress":"0x400540","StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":2},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"","Line":7,"StartAddress":"0x400540","StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":6},{"Column":0,"Discriminator":0,"FileName":"/tmp{{/|\\\\}}x.c","FunctionName":"","Line":14,"StartAddress":"0x400540","StartFileName":"/tmp{{/|\\\\}}x.c","StartLine":12}]}
 ## Invalid argument after a valid one.
 # NO-FUNC-A2L-NEXT:{"Error":{"Message":"unable to parse arguments: some text2"},"ModuleName":"{{.*}}/Inputs/addr.exe"}

llvm/test/tools/llvm-symbolizer/sym-verbose.test

 
 #CHECK: some text
 
 #CHECK: 0x400590
 #CHECK-NEXT: foo
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 4
+#CHECK-NEXT: Function start address: 0x400590
 #CHECK-NEXT: Line: 5
 #CHECK-NEXT: Column: 7
 #CHECK-NEXT: main
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 9
+#CHECK-NEXT: Function start address: 0x400590
 #CHECK-NEXT: Line: 10
 #CHECK-NEXT: Column: 0
 
 #CHECK: 0x4005a5
 #CHECK-NEXT: foo
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 4
+#CHECK-NEXT: Function start address: 0x400590
 #CHECK-NEXT: Line: 5
 #CHECK-NEXT: Column: 17
 #CHECK-NEXT: Discriminator: 2
 #CHECK-NEXT: main
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 9
+#CHECK-NEXT: Function start address: 0x400590
 #CHECK-NEXT: Line: 10
 #CHECK-NEXT: Column: 0
 
 #CHECK: 0x4005ad
 #CHECK-NEXT: foo
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 4
+#CHECK-NEXT: Function start address: 0x400590
 #CHECK-NEXT: Line: 0
 #CHECK-NEXT: Column: 30
 #CHECK-NEXT: Discriminator: 4
 #CHECK-NEXT: main
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 9
+#CHECK-NEXT: Function start address: 0x400590
 #CHECK-NEXT: Line: 10
 #CHECK-NEXT: Column: 0
 
 #CHECK: 0x4005b9
 #CHECK-NEXT: foo
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 4
+#CHECK-NEXT: Function start address: 0x4005b9
 #CHECK-NEXT: Line: 5
 #CHECK-NEXT: Column: 7
 #CHECK-NEXT: main
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 9
+#CHECK-NEXT: Function start address: 0x400590
 #CHECK-NEXT: Line: 10
 #CHECK-NEXT: Column: 0
 #CHECK-NEXT: Discriminator: 2
 
 #CHECK: 0x4005ce
 #CHECK-NEXT: foo
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 4
+#CHECK-NEXT: Function start address: 0x4005b9
 #CHECK-NEXT: Line: 5
 #CHECK-NEXT: Column: 17
 #CHECK-NEXT: Discriminator: 2
 #CHECK-NEXT: main
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 9
+#CHECK-NEXT: Function start address: 0x400590
 #CHECK-NEXT: Line: 10
 #CHECK-NEXT: Column: 0
 #CHECK-NEXT: Discriminator: 2
 
 #CHECK: 0x4005d4
 #CHECK-NEXT: foo
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 4
+#CHECK-NEXT: Function start address: 0x4005b9
 #CHECK-NEXT: Line: 5
 #CHECK-NEXT: Column: 30
 #CHECK-NEXT: Discriminator: 4
 #CHECK-NEXT: main
 #CHECK-NEXT: Filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start filename: /tmp{{[\\/]}}discrim.c
 #CHECK-NEXT: Function start line: 9
+#CHECK-NEXT: Function start address: 0x400590
 #CHECK-NEXT: Line: 10
 #CHECK-NEXT: Column: 0
 #CHECK-NEXT: Discriminator: 2
 
 #CHECK: some more text