Add the clang library to the repo (with some of my changes, too).

1 files changed, 133 insertions, 0 deletions

diff --git a/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp b/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
new file mode 100644
index 0000000..c06da0d
--- /dev/null
+++ b/clang/lib/StaticAnalyzer/Frontend/CheckerRegistration.cpp
@@ -0,0 +1,133 @@
+//===--- CheckerRegistration.cpp - Registration for the Analyzer Checkers -===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines the registration function for the analyzer checkers.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/StaticAnalyzer/Frontend/CheckerRegistration.h"
+#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"
+#include "clang/StaticAnalyzer/Checkers/ClangCheckers.h"
+#include "clang/StaticAnalyzer/Core/CheckerManager.h"
+#include "clang/StaticAnalyzer/Core/CheckerOptInfo.h"
+#include "clang/StaticAnalyzer/Core/CheckerRegistry.h"
+#include "clang/Frontend/AnalyzerOptions.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
+#include "clang/Basic/Diagnostic.h"
+#include "llvm/Support/DynamicLibrary.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/SmallVector.h"
+
+using namespace clang;
+using namespace ento;
+using llvm::sys::DynamicLibrary;
+
+namespace {
+class ClangCheckerRegistry : public CheckerRegistry {
+  typedef void (*RegisterCheckersFn)(CheckerRegistry &);
+
+  static bool isCompatibleAPIVersion(const char *versionString);
+  static void warnIncompatible(DiagnosticsEngine *diags, StringRef pluginPath,
+                               const char *pluginAPIVersion);
+
+public:
+  ClangCheckerRegistry(ArrayRef<std::string> plugins,
+                       DiagnosticsEngine *diags = 0);
+};
+  
+} // end anonymous namespace
+
+ClangCheckerRegistry::ClangCheckerRegistry(ArrayRef<std::string> plugins,
+                                           DiagnosticsEngine *diags) {
+  registerBuiltinCheckers(*this);
+
+  for (ArrayRef<std::string>::iterator i = plugins.begin(), e = plugins.end();
+       i != e; ++i) {
+    // Get access to the plugin.
+    DynamicLibrary lib = DynamicLibrary::getPermanentLibrary(i->c_str());
+
+    // See if it's compatible with this build of clang.
+    const char *pluginAPIVersion =
+      (const char *) lib.getAddressOfSymbol("clang_analyzerAPIVersionString");
+    if (!isCompatibleAPIVersion(pluginAPIVersion)) {
+      warnIncompatible(diags, *i, pluginAPIVersion);
+      continue;
+    }
+
+    // Register its checkers.
+    RegisterCheckersFn registerPluginCheckers =
+      (RegisterCheckersFn) (intptr_t) lib.getAddressOfSymbol(
+                                                      "clang_registerCheckers");
+    if (registerPluginCheckers)
+      registerPluginCheckers(*this);
+  }
+}
+
+bool ClangCheckerRegistry::isCompatibleAPIVersion(const char *versionString) {
+  // If the version string is null, it's not an analyzer plugin.
+  if (versionString == 0)
+    return false;
+
+  // For now, none of the static analyzer API is considered stable.
+  // Versions must match exactly.
+  if (strcmp(versionString, CLANG_ANALYZER_API_VERSION_STRING) == 0)
+    return true;
+
+  return false;
+}
+
+void ClangCheckerRegistry::warnIncompatible(DiagnosticsEngine *diags,
+                                            StringRef pluginPath,
+                                            const char *pluginAPIVersion) {
+  if (!diags)
+    return;
+  if (!pluginAPIVersion)
+    return;
+
+  diags->Report(diag::warn_incompatible_analyzer_plugin_api)
+      << llvm::sys::path::filename(pluginPath);
+  diags->Report(diag::note_incompatible_analyzer_plugin_api)
+      << CLANG_ANALYZER_API_VERSION_STRING
+      << pluginAPIVersion;
+}
+
+
+CheckerManager *ento::createCheckerManager(const AnalyzerOptions &opts,
+                                           const LangOptions &langOpts,
+                                           ArrayRef<std::string> plugins,
+                                           DiagnosticsEngine &diags) {
+  OwningPtr<CheckerManager> checkerMgr(new CheckerManager(langOpts));
+
+  SmallVector<CheckerOptInfo, 8> checkerOpts;
+  for (unsigned i = 0, e = opts.CheckersControlList.size(); i != e; ++i) {
+    const std::pair<std::string, bool> &opt = opts.CheckersControlList[i];
+    checkerOpts.push_back(CheckerOptInfo(opt.first.c_str(), opt.second));
+  }
+
+  ClangCheckerRegistry allCheckers(plugins, &diags);
+  allCheckers.initializeManager(*checkerMgr, checkerOpts);
+  checkerMgr->finishedCheckerRegistration();
+
+  for (unsigned i = 0, e = checkerOpts.size(); i != e; ++i) {
+    if (checkerOpts[i].isUnclaimed())
+      diags.Report(diag::warn_unknown_analyzer_checker)
+          << checkerOpts[i].getName();
+  }
+
+  return checkerMgr.take();
+}
+
+void ento::printCheckerHelp(raw_ostream &out, ArrayRef<std::string> plugins) {
+  out << "OVERVIEW: Clang Static Analyzer Checkers List\n\n";
+  out << "USAGE: -analyzer-checker <CHECKER or PACKAGE,...>\n\n";
+
+  ClangCheckerRegistry(plugins).printHelp(out);
+}