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[clang] Bypass FS sandbox during Linux distro detection #175201

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[clang] Bypass FS sandbox during Linux distro detection #175201

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6 changes: 5 additions & 1 deletion clang/lib/Driver/Distro.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/IOSandbox.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Threading.h"
#include "llvm/TargetParser/Host.h"
Expand Down Expand Up @@ -211,7 +212,10 @@ static Distro::DistroType GetDistro(llvm::vfs::FileSystem &VFS,
return Distro::UnknownDistro;

// True if we're backed by a real file system.
const bool onRealFS = (llvm::vfs::getRealFileSystem() == &VFS);
const bool onRealFS = [&] {
auto BypassSandbox = llvm::sys::sandbox::scopedDisable();
return llvm::vfs::getRealFileSystem() == &VFS;
}();

// If the host is not running Linux, and we're backed by a real file
// system, no need to check the distro. This is the case where someone
Expand Down