From 7aa1fa0a0a07f7949d2d77c099aab43cf9b75a91 Mon Sep 17 00:00:00 2001
From: Mitch Phillips <31459023+hctim@users.noreply.github.com>
Date: Wed, 18 May 2022 13:39:59 -0700
Subject: Reland "[dwarf] Emit a DIGlobalVariable for constant strings."

An upcoming patch will extend llvm-symbolizer to provide the source line
information for global variables. The goal is to move AddressSanitizer
off of internal debug info for symbolization onto the DWARF standard
(and doing a clean-up in the process). Currently, ASan reports the line
information for constant strings if a memory safety bug happens around
them. We want to keep this behaviour, so we need to emit debuginfo for
these variables as well.

Reviewed By: dblaikie, rnk, aprantl

Differential Revision: https://reviews.llvm.org/D123534
---
 clang/lib/CodeGen/CodeGenModule.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'clang/lib/CodeGen/CodeGenModule.cpp')

diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index f8bf210dc0e2..703cf4edf5f5 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -5670,6 +5670,11 @@ CodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S,
   }
 
   auto GV = GenerateStringLiteral(C, LT, *this, GlobalVariableName, Alignment);
+
+  CGDebugInfo *DI = getModuleDebugInfo();
+  if (DI && getCodeGenOpts().hasReducedDebugInfo())
+    DI->AddStringLiteralDebugInfo(GV, S);
+
   if (Entry)
     *Entry = GV;
 
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