Define InitLLVM to do common initialization all at once.
We have a few functions that virtually all command wants to run on
process startup/shutdown. This patch adds InitLLVM class to do that
all at once, so that we don't need to copy-n-paste boilerplate code
to each llvm command's main() function.
Differential Revision: https://reviews.llvm.org/D45602
llvm-svn: 330046
diff --git a/llvm/lib/Support/InitLLVM.cpp b/llvm/lib/Support/InitLLVM.cpp
new file mode 100644
index 0000000..c76b1bd
--- /dev/null
+++ b/llvm/lib/Support/InitLLVM.cpp
@@ -0,0 +1,48 @@
+//===-- InitLLVM.cpp -----------------------------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/InitLLVM.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Process.h"
+#include "llvm/Support/Signals.h"
+#include <string>
+
+using namespace llvm;
+
+InitLLVM::InitLLVM(int &Argc, const char **&Argv) : StackPrinter(Argc, Argv) {
+ sys::PrintStackTraceOnErrorSignal(Argv[0]);
+
+#ifdef _WIN32
+ // We use UTF-8 as the internal character encoding. On Windows,
+ // arguments passed to main() may not be encoded in UTF-8. In order
+ // to reliably detect encoding of command line arguments, we use an
+ // Windows API to obtain arguments, convert them to UTF-8, and then
+ // write them back to the Argv vector.
+ //
+ // There's probably other way to do the same thing (e.g. using
+ // wmain() instead of main()), but this way seems less intrusive
+ // than that.
+ std::string Banner = std::string(Argv[0]) + ": ";
+ ExitOnError ExitOnErr(Banner);
+
+ ExitOnErr(errorCodeToError(
+ sys::Process::GetArgumentVector(Args, makeArrayRef(Argv, Argc), Alloc)));
+
+ // GetArgumentVector doesn't terminate the vector with a nullptr.
+ // Do it to make it compatible with the real argv.
+ Args.push_back(nullptr);
+
+ Argc = Args.size() - 1;
+ Argv = Args.data();
+#endif
+}
+
+InitLLVM::~InitLLVM() { llvm_shutdown(); }