Extend llvm-profgen to generate vtable profilesusers/mingmingl-llvm/llvm-profgen

1 files changed, 40 insertions, 0 deletions

diff --git a/llvm/tools/llvm-profgen/ProfiledBinary.cpp b/llvm/tools/llvm-profgen/ProfiledBinary.cpp
index 6847ba1..9adc203 100644
--- a/llvm/tools/llvm-profgen/ProfiledBinary.cpp
+++ b/llvm/tools/llvm-profgen/ProfiledBinary.cpp
@@ -336,6 +336,12 @@ void ProfiledBinary::setPreferredTextSegmentAddresses(const ELFFile<ELFT> &Obj,
         PreferredTextSegmentAddresses.push_back(Phdr.p_vaddr &
                                                 ~(PageSize - 1U));
         TextSegmentOffsets.push_back(Phdr.p_offset & ~(PageSize - 1U));
+      } else {
+        PhdrInfo Info;
+        Info.FileOffset = Phdr.p_offset;
+        Info.FileSz = Phdr.p_filesz;
+        Info.vAddr = Phdr.p_vaddr;
+        NonTextPhdrInfo.push_back(Info);
       }
     }
   }
@@ -344,6 +350,32 @@ void ProfiledBinary::setPreferredTextSegmentAddresses(const ELFFile<ELFT> &Obj,
     exitWithError("no executable segment found", FileName);
 }
 
+uint64_t ProfiledBinary::CanonicalizeNonTextAddress(uint64_t Address) {
+  uint64_t FileOffset = 0;
+  for (const auto &MMapEvent : MMapNonTextEvents) {
+    if (MMapEvent.Address <= Address &&
+        Address < MMapEvent.Address + MMapEvent.Size) {
+      // If the address is within the mmap event, return the file offset.
+      FileOffset = Address - MMapEvent.Address + MMapEvent.Offset;
+      break;
+    }
+  }
+  if (FileOffset == 0) {
+    // If the address is not within any mmap event, return the address as is.
+    return Address;
+  }
+  for (const auto &PhdrInfo : NonTextPhdrInfo) {
+    // Check if the file offset is within the non-text segment.
+    if (PhdrInfo.FileOffset <= FileOffset &&
+        FileOffset < PhdrInfo.FileOffset + PhdrInfo.FileSz) {
+      // If it is, return the virtual address of the segment.
+      return PhdrInfo.vAddr + (FileOffset - PhdrInfo.FileOffset);
+    }
+  }
+
+  return Address;
+}
+
 void ProfiledBinary::setPreferredTextSegmentAddresses(const COFFObjectFile *Obj,
                                                       StringRef FileName) {
   uint64_t ImageBase = Obj->getImageBase();
@@ -946,6 +978,14 @@ SampleContextFrameVector ProfiledBinary::symbolize(const InstructionPointer &IP,
   return CallStack;
 }
 
+StringRef ProfiledBinary::symbolizeDataAddress(uint64_t Address) {
+  DIGlobal DataDIGlobal = unwrapOrError(
+      Symbolizer->symbolizeData(SymbolizerPath.str(), {Address, 0}),
+      SymbolizerPath);
+  auto It = NameStrings.insert(DataDIGlobal.Name);
+  return StringRef(*It.first);
+}
+
 void ProfiledBinary::computeInlinedContextSizeForRange(uint64_t RangeBegin,
                                                        uint64_t RangeEnd) {
   InstructionPointer IP(this, RangeBegin, true);