Update prebuilt Clang to r353983e.HEADq10.0

clang 9.0.5 (based on r353983e) from build 5696680.

Bug: http://b/135931688
Bug: http://b/136008926
Test: N/A
Change-Id: I922d17410047d2e2df4625615352c588ee71b203

1 files changed, 132 insertions, 0 deletions

diff --git a/clang-r353983e/include/llvm/Support/DynamicLibrary.h b/clang-r353983e/include/llvm/Support/DynamicLibrary.h
new file mode 100644
index 00000000..95d5ba28
--- /dev/null
+++ b/clang-r353983e/include/llvm/Support/DynamicLibrary.h
@@ -0,0 +1,132 @@
+//===-- llvm/Support/DynamicLibrary.h - Portable Dynamic Library -*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the sys::DynamicLibrary class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_DYNAMICLIBRARY_H
+#define LLVM_SUPPORT_DYNAMICLIBRARY_H
+
+#include <string>
+
+namespace llvm {
+
+class StringRef;
+
+namespace sys {
+
+  /// This class provides a portable interface to dynamic libraries which also
+  /// might be known as shared libraries, shared objects, dynamic shared
+  /// objects, or dynamic link libraries. Regardless of the terminology or the
+  /// operating system interface, this class provides a portable interface that
+  /// allows dynamic libraries to be loaded and searched for externally
+  /// defined symbols. This is typically used to provide "plug-in" support.
+  /// It also allows for symbols to be defined which don't live in any library,
+  /// but rather the main program itself, useful on Windows where the main
+  /// executable cannot be searched.
+  ///
+  /// Note: there is currently no interface for temporarily loading a library,
+  /// or for unloading libraries when the LLVM library is unloaded.
+  class DynamicLibrary {
+    // Placeholder whose address represents an invalid library.
+    // We use this instead of NULL or a pointer-int pair because the OS library
+    // might define 0 or 1 to be "special" handles, such as "search all".
+    static char Invalid;
+
+    // Opaque data used to interface with OS-specific dynamic library handling.
+    void *Data;
+
+  public:
+    explicit DynamicLibrary(void *data = &Invalid) : Data(data) {}
+
+    /// Returns true if the object refers to a valid library.
+    bool isValid() const { return Data != &Invalid; }
+
+    /// Searches through the library for the symbol \p symbolName. If it is
+    /// found, the address of that symbol is returned. If not, NULL is returned.
+    /// Note that NULL will also be returned if the library failed to load.
+    /// Use isValid() to distinguish these cases if it is important.
+    /// Note that this will \e not search symbols explicitly registered by
+    /// AddSymbol().
+    void *getAddressOfSymbol(const char *symbolName);
+
+    /// This function permanently loads the dynamic library at the given path.
+    /// The library will only be unloaded when llvm_shutdown() is called.
+    /// This returns a valid DynamicLibrary instance on success and an invalid
+    /// instance on failure (see isValid()). \p *errMsg will only be modified
+    /// if the library fails to load.
+    ///
+    /// It is safe to call this function multiple times for the same library.
+    /// Open a dynamic library permanently.
+    static DynamicLibrary getPermanentLibrary(const char *filename,
+                                              std::string *errMsg = nullptr);
+
+    /// Registers an externally loaded library. The library will be unloaded
+    /// when the program terminates.
+    ///
+    /// It is safe to call this function multiple times for the same library,
+    /// though ownership is only taken if there was no error.
+    ///
+    /// \returns An empty \p DynamicLibrary if the library was already loaded.
+    static DynamicLibrary addPermanentLibrary(void *handle,
+                                              std::string *errMsg = nullptr);
+
+    /// This function permanently loads the dynamic library at the given path.
+    /// Use this instead of getPermanentLibrary() when you won't need to get
+    /// symbols from the library itself.
+    ///
+    /// It is safe to call this function multiple times for the same library.
+    static bool LoadLibraryPermanently(const char *Filename,
+                                       std::string *ErrMsg = nullptr) {
+      return !getPermanentLibrary(Filename, ErrMsg).isValid();
+    }
+
+    enum SearchOrdering {
+      /// SO_Linker - Search as a call to dlsym(dlopen(NULL)) would when
+      /// DynamicLibrary::getPermanentLibrary(NULL) has been called or
+      /// search the list of explcitly loaded symbols if not.
+      SO_Linker,
+      /// SO_LoadedFirst - Search all loaded libraries, then as SO_Linker would.
+      SO_LoadedFirst,
+      /// SO_LoadedLast - Search as SO_Linker would, then loaded libraries.
+      /// Only useful to search if libraries with RTLD_LOCAL have been added.
+      SO_LoadedLast,
+      /// SO_LoadOrder - Or this in to search libraries in the ordered loaded.
+      /// The default bahaviour is to search loaded libraries in reverse.
+      SO_LoadOrder = 4
+    };
+    static SearchOrdering SearchOrder; // = SO_Linker
+
+    /// This function will search through all previously loaded dynamic
+    /// libraries for the symbol \p symbolName. If it is found, the address of
+    /// that symbol is returned. If not, null is returned. Note that this will
+    /// search permanently loaded libraries (getPermanentLibrary()) as well
+    /// as explicitly registered symbols (AddSymbol()).
+    /// @throws std::string on error.
+    /// Search through libraries for address of a symbol
+    static void *SearchForAddressOfSymbol(const char *symbolName);
+
+    /// Convenience function for C++ophiles.
+    static void *SearchForAddressOfSymbol(const std::string &symbolName) {
+      return SearchForAddressOfSymbol(symbolName.c_str());
+    }
+
+    /// This functions permanently adds the symbol \p symbolName with the
+    /// value \p symbolValue.  These symbols are searched before any
+    /// libraries.
+    /// Add searchable symbol/value pair.
+    static void AddSymbol(StringRef symbolName, void *symbolValue);
+
+    class HandleSet;
+  };
+
+} // End sys namespace
+} // End llvm namespace
+
+#endif