[WinEH] Emit .safeseh directives for all 32-bit exception handlers

Use a "safeseh" string attribute to do this. You would think we chould
just accumulate the set of personalities like we do on dwarf, but this
fails to account for the LSDA-loading thunks we use for
__CxxFrameHandler3. Each of those needs to make it into .sxdata as well.
The string attribute seemed like the most straightforward approach.

llvm-svn: 239448

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/WinException.cpp b/llvm/lib/CodeGen/AsmPrinter/WinException.cpp
index 7e3a6d5a76f..ffa0ceb1a60 100644
--- a/llvm/lib/CodeGen/AsmPrinter/WinException.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/WinException.cpp
@@ -50,6 +50,14 @@ WinException::~WinException() {}
 /// endModule - Emit all exception information that should come after the
 /// content.
 void WinException::endModule() {
+  auto &OS = *Asm->OutStreamer;
+  const Module *M = MMI->getModule();
+  for (const Function &F : *M) {
+    if (F.hasFnAttribute("safeseh")) {
+      llvm::errs() << ".safeseh " << F.getName() << "\n";
+      OS.EmitCOFFSafeSEH(Asm->getSymbol(&F));
+    }
+  }
 }
 
 void WinException::beginFunction(const MachineFunction *MF) {