[DebugInfo] add SectionedAddress to DebugInfo interfaces.

      That patch is the fix for https://bugs.llvm.org/show_bug.cgi?id=40703
   "wrong line number info for obj file compiled with -ffunction-sections"
   bug. The problem happened with only .o files. If object file contains
   several .text sections then line number information showed incorrectly.
   The reason for this is that DwarfLineTable could not detect section which
   corresponds to specified address(because address is the local to the
   section). And as the result it could not select proper sequence in the
   line table. The fix is to pass SectionIndex with the address. So that it
   would be possible to differentiate addresses from various sections. With
   this fix llvm-objdump shows correct line numbers for disassembled code.

   Differential review: https://reviews.llvm.org/D58194

llvm-svn: 354972

1 files changed, 8 insertions, 2 deletions

diff --git a/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp b/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp
index e792b7257ea..69d70e94808 100644
--- a/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp
+++ b/llvm/tools/llvm-rtdyld/llvm-rtdyld.cpp
@@ -367,6 +367,8 @@ static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) {
         }
         uint64_t Addr = *AddrOrErr;
 
+        object::SectionedAddress Address;
+
         uint64_t Size = P.second;
         // If we're not using the debug object, compute the address of the
         // symbol in memory (rather than that in the unrelocated object file)
@@ -381,16 +383,20 @@ static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) {
           object::section_iterator Sec = *SecOrErr;
           StringRef SecName;
           Sec->getName(SecName);
+          Address.SectionIndex = Sec->getIndex();
           uint64_t SectionLoadAddress =
             LoadedObjInfo->getSectionLoadAddress(*Sec);
           if (SectionLoadAddress != 0)
             Addr += SectionLoadAddress - Sec->getAddress();
-        }
+        } else if (auto SecOrErr = Sym.getSection())
+          Address.SectionIndex = SecOrErr.get()->getIndex();
 
         outs() << "Function: " << *Name << ", Size = " << Size
                << ", Addr = " << Addr << "\n";
 
-        DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
+        Address.Address = Addr;
+        DILineInfoTable Lines =
+            Context->getLineInfoForAddressRange(Address, Size);
         for (auto &D : Lines) {
           outs() << "  Line info @ " << D.first - Addr << ": "
                  << D.second.FileName << ", line:" << D.second.Line << "\n";