Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 294 insertions, 0 deletions

diff --git a/third_party/libwebrtc/tools/clang/plugins/ChromeClassTester.cpp b/third_party/libwebrtc/tools/clang/plugins/ChromeClassTester.cpp
new file mode 100644
index 0000000000..055866c5c5
--- /dev/null
+++ b/third_party/libwebrtc/tools/clang/plugins/ChromeClassTester.cpp
@@ -0,0 +1,294 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// A general interface for filtering and only acting on classes in Chromium C++
+// code.
+
+#include "ChromeClassTester.h"
+
+#include <sys/param.h>
+
+#include "clang/AST/AST.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/SourceManager.h"
+
+using namespace clang;
+
+namespace {
+
+bool starts_with(const std::string& one, const std::string& two) {
+  return one.compare(0, two.size(), two) == 0;
+}
+
+std::string lstrip(const std::string& one, const std::string& two) {
+  if (starts_with(one, two))
+    return one.substr(two.size());
+  return one;
+}
+
+bool ends_with(const std::string& one, const std::string& two) {
+  if (two.size() > one.size())
+    return false;
+
+  return one.compare(one.size() - two.size(), two.size(), two) == 0;
+}
+
+}  // namespace
+
+ChromeClassTester::ChromeClassTester(CompilerInstance& instance)
+    : instance_(instance),
+      diagnostic_(instance.getDiagnostics()) {
+  BuildBannedLists();
+}
+
+ChromeClassTester::~ChromeClassTester() {}
+
+void ChromeClassTester::HandleTagDeclDefinition(TagDecl* tag) {
+  pending_class_decls_.push_back(tag);
+}
+
+bool ChromeClassTester::HandleTopLevelDecl(DeclGroupRef group_ref) {
+  for (size_t i = 0; i < pending_class_decls_.size(); ++i)
+    CheckTag(pending_class_decls_[i]);
+  pending_class_decls_.clear();
+
+  return true;  // true means continue parsing.
+}
+
+void ChromeClassTester::CheckTag(TagDecl* tag) {
+  // We handle class types here where we have semantic information. We can only
+  // check structs/classes/enums here, but we get a bunch of nice semantic
+  // information instead of just parsing information.
+
+  if (CXXRecordDecl* record = dyn_cast<CXXRecordDecl>(tag)) {
+    // If this is a POD or a class template or a type dependent on a
+    // templated class, assume there's no ctor/dtor/virtual method
+    // optimization that we can do.
+    if (record->isPOD() ||
+        record->getDescribedClassTemplate() ||
+        record->getTemplateSpecializationKind() ||
+        record->isDependentType())
+      return;
+
+    if (InBannedNamespace(record))
+      return;
+
+    SourceLocation record_location = record->getInnerLocStart();
+    if (InBannedDirectory(record_location))
+      return;
+
+    // We sadly need to maintain a blacklist of types that violate these
+    // rules, but do so for good reason or due to limitations of this
+    // checker (i.e., we don't handle extern templates very well).
+    std::string base_name = record->getNameAsString();
+    if (IsIgnoredType(base_name))
+      return;
+
+    // We ignore all classes that end with "Matcher" because they're probably
+    // GMock artifacts.
+    if (ends_with(base_name, "Matcher"))
+        return;
+
+    CheckChromeClass(record_location, record);
+  }
+}
+
+void ChromeClassTester::emitWarning(SourceLocation loc,
+                                    const char* raw_error) {
+  FullSourceLoc full(loc, instance().getSourceManager());
+  std::string err;
+  err = "[chromium-style] ";
+  err += raw_error;
+  DiagnosticsEngine::Level level =
+      diagnostic().getWarningsAsErrors() ?
+      DiagnosticsEngine::Error :
+      DiagnosticsEngine::Warning;
+  unsigned id = diagnostic().getCustomDiagID(level, err);
+  DiagnosticBuilder builder = diagnostic().Report(full, id);
+}
+
+bool ChromeClassTester::InBannedNamespace(const Decl* record) {
+  std::string n = GetNamespace(record);
+  if (!n.empty()) {
+    return std::find(banned_namespaces_.begin(), banned_namespaces_.end(), n)
+        != banned_namespaces_.end();
+  }
+
+  return false;
+}
+
+std::string ChromeClassTester::GetNamespace(const Decl* record) {
+  return GetNamespaceImpl(record->getDeclContext(), "");
+}
+
+bool ChromeClassTester::InImplementationFile(SourceLocation record_location) {
+  std::string filename;
+  if (!GetFilename(record_location, &filename))
+    return false;
+
+  if (ends_with(filename, ".cc") || ends_with(filename, ".cpp") ||
+      ends_with(filename, ".mm")) {
+    return true;
+  }
+
+  return false;
+}
+
+void ChromeClassTester::BuildBannedLists() {
+  banned_namespaces_.push_back("std");
+  banned_namespaces_.push_back("__gnu_cxx");
+  banned_namespaces_.push_back("WebKit");
+
+  banned_directories_.push_back("third_party/");
+  banned_directories_.push_back("native_client/");
+  banned_directories_.push_back("breakpad/");
+  banned_directories_.push_back("courgette/");
+  banned_directories_.push_back("pdf/");
+  banned_directories_.push_back("ppapi/");
+  banned_directories_.push_back("usr/");
+  banned_directories_.push_back("testing/");
+  banned_directories_.push_back("googleurl/");
+  banned_directories_.push_back("v8/");
+  banned_directories_.push_back("dart/");
+  banned_directories_.push_back("sdch/");
+  banned_directories_.push_back("icu4c/");
+  banned_directories_.push_back("frameworks/");
+
+  // Don't check autogenerated headers.
+  // Make puts them below $(builddir_name)/.../gen and geni.
+  // Ninja puts them below OUTPUT_DIR/.../gen
+  // Xcode has a fixed output directory for everything.
+  banned_directories_.push_back("gen/");
+  banned_directories_.push_back("geni/");
+  banned_directories_.push_back("xcodebuild/");
+
+  // You are standing in a mazy of twisty dependencies, all resolved by
+  // putting everything in the header.
+  banned_directories_.push_back("automation/");
+
+  // Don't check system headers.
+  banned_directories_.push_back("/Developer/");
+
+  // Used in really low level threading code that probably shouldn't be out of
+  // lined.
+  ignored_record_names_.insert("ThreadLocalBoolean");
+
+  // A complicated pickle derived struct that is all packed integers.
+  ignored_record_names_.insert("Header");
+
+  // Part of the GPU system that uses multiple included header
+  // weirdness. Never getting this right.
+  ignored_record_names_.insert("Validators");
+
+  // Has a UNIT_TEST only constructor. Isn't *terribly* complex...
+  ignored_record_names_.insert("AutocompleteController");
+  ignored_record_names_.insert("HistoryURLProvider");
+
+  // Because of chrome frame
+  ignored_record_names_.insert("ReliabilityTestSuite");
+
+  // Used over in the net unittests. A large enough bundle of integers with 1
+  // non-pod class member. Probably harmless.
+  ignored_record_names_.insert("MockTransaction");
+
+  // Used heavily in ui_unittests and once in views_unittests. Fixing this
+  // isn't worth the overhead of an additional library.
+  ignored_record_names_.insert("TestAnimationDelegate");
+
+  // Part of our public interface that nacl and friends use. (Arguably, this
+  // should mean that this is a higher priority but fixing this looks hard.)
+  ignored_record_names_.insert("PluginVersionInfo");
+}
+
+std::string ChromeClassTester::GetNamespaceImpl(const DeclContext* context,
+                                                const std::string& candidate) {
+  switch (context->getDeclKind()) {
+    case Decl::TranslationUnit: {
+      return candidate;
+    }
+    case Decl::Namespace: {
+      const NamespaceDecl* decl = dyn_cast<NamespaceDecl>(context);
+      std::string name_str;
+      llvm::raw_string_ostream OS(name_str);
+      if (decl->isAnonymousNamespace())
+        OS << "<anonymous namespace>";
+      else
+        OS << *decl;
+      return GetNamespaceImpl(context->getParent(),
+                              OS.str());
+    }
+    default: {
+      return GetNamespaceImpl(context->getParent(), candidate);
+    }
+  }
+}
+
+bool ChromeClassTester::InBannedDirectory(SourceLocation loc) {
+  std::string filename;
+  if (!GetFilename(loc, &filename)) {
+    // If the filename cannot be determined, simply treat this as a banned
+    // location, instead of going through the full lookup process.
+    return true;
+  }
+
+  // We need to special case scratch space; which is where clang does its
+  // macro expansion. We explicitly want to allow people to do otherwise bad
+  // things through macros that were defined due to third party libraries.
+  if (filename == "<scratch space>")
+    return true;
+
+  // Don't complain about autogenerated protobuf files.
+  if (ends_with(filename, ".pb.h")) {
+    return true;
+  }
+
+  // We need to munge the paths so that they are relative to the repository
+  // srcroot. We first resolve the symlinktastic relative path and then
+  // remove our known srcroot from it if needed.
+  char resolvedPath[MAXPATHLEN];
+  if (realpath(filename.c_str(), resolvedPath)) {
+    filename = resolvedPath;
+  }
+
+  // On linux, chrome is often checked out to /usr/local/google. Due to the
+  // "usr" rule in banned_directories_, all diagnostics would be suppressed
+  // in that case. As a workaround, strip that prefix.
+  filename = lstrip(filename, "/usr/local/google");
+
+  for (std::vector<std::string>::const_iterator it =
+           banned_directories_.begin();
+       it != banned_directories_.end(); ++it) {
+    // If we can find any of the banned path components in this path, then
+    // this file is rejected.
+    size_t index = filename.find(*it);
+    if (index != std::string::npos) {
+      bool matches_full_dir_name = index == 0 || filename[index - 1] == '/';
+      if ((*it)[0] == '/')
+        matches_full_dir_name = true;
+      if (matches_full_dir_name)
+        return true;
+    }
+  }
+
+  return false;
+}
+
+bool ChromeClassTester::IsIgnoredType(const std::string& base_name) {
+  return ignored_record_names_.find(base_name) != ignored_record_names_.end();
+}
+
+bool ChromeClassTester::GetFilename(SourceLocation loc,
+                                    std::string* filename) {
+  const SourceManager& source_manager = instance_.getSourceManager();
+  SourceLocation spelling_location = source_manager.getSpellingLoc(loc);
+  PresumedLoc ploc = source_manager.getPresumedLoc(spelling_location);
+  if (ploc.isInvalid()) {
+    // If we're in an invalid location, we're looking at things that aren't
+    // actually stated in the source.
+    return false;
+  }
+
+  *filename = ploc.getFilename();
+  return true;
+}