From 7b67fe22194ba1d8901d3c216192a4710b13dfb6 Mon Sep 17 00:00:00 2001
From: likholatovevgeny <likholatov.evgeny@huawei-partners.com>
Date: Mon, 20 May 2024 17:10:07 +0300
Subject: [PATCH] Added printing info about duplicates with --adlt-trace flag.

Signed-off-by: likholatovevgeny <likholatov.evgeny@huawei-partners.com>
---
 lld/ELF/Writer.cpp | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/lld/ELF/Writer.cpp b/lld/ELF/Writer.cpp
index 6743de95cd2f..bd7ad685c436 100644
--- a/lld/ELF/Writer.cpp
+++ b/lld/ELF/Writer.cpp
@@ -558,6 +558,7 @@ static struct AdltWriter {
   template <typename ELFT> void trackPhdr(OutputSection *sec, PhdrEntry *phdr);
   template <typename ELFT> void traceRelocs();
   template <typename ELFT> void tracePhdrs();
+  template <typename ELFT> void traceDuplicates();
 } adltWriter;
 } // namespace
 
@@ -674,6 +675,33 @@ template <typename ELFT> void AdltWriter::tracePhdrs() {
     }
 }
 
+template <typename ELFT> void AdltWriter::traceDuplicates() {
+  SmallVector<std::pair<SharedFileExtended<ELFT>*, Symbol*>, 0> duplicates;
+  lld::outs() << "[ADLT] Duplicate symbols:\n";
+  for (auto cachedName : ctx->adlt.duplicatedSymNames) {
+    StringRef name = cachedName.val();
+    for (auto *file : ctx->sharedFilesExtended)
+      if (auto *soFile = cast<SharedFileExtended<ELFT>>(file)) {
+        StringRef newName = soFile->addAdltPostfix(name);
+        Symbol *sym = elf::symtab->find(newName);
+        if (sym != nullptr)
+          duplicates.push_back({soFile, sym});
+      }
+
+    lld::outs() << "[ADLT] " << name << ":\n";
+    lld::outs() << "Shared files indexes: ";
+    for (auto it : duplicates)
+      lld::outs() << it.first->orderIdx << " ";
+    lld::outs() << "\n";
+
+    for (auto it : duplicates)
+      lld::outs() << it.first->orderIdx << ": "
+                  << it.second->getOutputSection()->name << "\t"
+                  << it.first->soName << "\n";
+    duplicates.clear();
+  }
+}
+
 StringRef AdltWriter::phdrTypeToStr(uint32_t p_type) {
   switch (p_type) {
   case PT_PHDR:
@@ -2347,6 +2375,7 @@ template <class ELFT> void Writer<ELFT>::finalizeSections() {
       adltWriter.checkPhdrs<ELFT>();
       adltWriter.checkRelocs<ELFT>();
       if (config->adltTrace) {
+        adltWriter.traceDuplicates<ELFT>();
         adltWriter.tracePhdrs<ELFT>();
         adltWriter.traceRelocs<ELFT>();
       }
-- 
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