[Lldb-commits] [lldb] [lldb][Linux] Mark memory regions used for shadow stacks (PR #117861)

[Omair Javaid via lldb-commits]

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@@ -164,12 +164,17 @@ void lldb_private::ParseLinuxSMapRegions(llvm::StringRef linux_smap,
     if (!name.contains(' ')) {
       if (region) {
         if (name == "VmFlags") {
-          if (value.contains("mt"))
-            region->SetMemoryTagged(MemoryRegionInfo::eYes);
-          else
-            region->SetMemoryTagged(MemoryRegionInfo::eNo);
+          region->SetMemoryTagged(MemoryRegionInfo::eNo);
+          region->SetIsShadowStack(MemoryRegionInfo::eNo);
+
+          llvm::SmallVector<llvm::StringRef> flags;
+          value.split(flags, ' ', /*MaxSplit=*/-1, /*KeepEmpty=*/false);
+          for (llvm::StringRef flag : flags)
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omjavaid wrote:

instead of tokenizing and checking cant we just use
`if (value.contains("mt"))
region_info.SetMemoryTagged(MemoryRegionInfo::eYes);

if (value.contains("ss"))
region_info.SetIsShadowStack(MemoryRegionInfo::eYes);`

https://github.com/llvm/llvm-project/pull/117861