[llvm] [llvm-profgen] Loading binary functions from .symtab when DWARF info is incomplete (PR #163654)

[via llvm-commits]

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@@ -820,6 +839,95 @@ void ProfiledBinary::populateSymbolAddressList(const ObjectFile *Obj) {
   }
 }
 
+void ProfiledBinary::loadSymbolsFromSymtab(const ObjectFile *Obj) {
+  // Load binary functions from symbol table when Debug info is incomplete.
+  // Strip the internal suffixes which are not reflected in the DWARF info.
+  const SmallVector<StringRef, 10> Suffixes(
+      {// Internal suffixes from CoroSplit pass
+       ".cleanup", ".destroy", ".resume",
+       // Internal suffixes from Bolt
+       ".cold", ".warm",
+       // Compiler/LTO internal
+       ".llvm.", ".part.", ".isra.", ".constprop.", ".lto_priv."});
+  StringRef FileName = Obj->getFileName();
+  for (const SymbolRef &Symbol : Obj->symbols()) {
+    const SymbolRef::Type Type = unwrapOrError(Symbol.getType(), FileName);
+    const uint64_t StartAddr = unwrapOrError(Symbol.getAddress(), FileName);
+    const StringRef Name = unwrapOrError(Symbol.getName(), FileName);
+    uint64_t Size = 0;
+    if (isa<ELFObjectFileBase>(Symbol.getObject())) {
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HighW4y2H3ll wrote:

Good point! let me update this!

https://github.com/llvm/llvm-project/pull/163654