Move dead submodules in-tree

Signed-off-by: swurl <swurl@swurl.xyz>

externals/breakpad/src/common/language.cc

@@ -0,0 +1,223 @@
+// Copyright 2010 Google LLC
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>
+
+// language.cc: Subclasses and singletons for google_breakpad::Language.
+// See language.h for details.
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>  // Must come first
+#endif
+
+#include "common/language.h"
+
+#include <stdlib.h>
+#include <array>
+
+#if !defined(__ANDROID__)
+#include <cxxabi.h>
+#endif
+
+#if defined(HAVE_RUSTC_DEMANGLE)
+#include <rustc_demangle.h>
+#endif
+
+#include <limits>
+
+namespace {
+
+string MakeQualifiedNameWithSeparator(const string& parent_name,
+                                      const char* separator,
+                                      const string& name) {
+  if (parent_name.empty()) {
+    return name;
+  }
+
+  return parent_name + separator + name;
+}
+
+}  // namespace
+
+namespace google_breakpad {
+
+// C++ language-specific operations.
+class CPPLanguage: public Language {
+ public:
+  CPPLanguage() {}
+
+  string MakeQualifiedName(const string& parent_name,
+                           const string& name) const {
+    return MakeQualifiedNameWithSeparator(parent_name, "::", name);
+  }
+
+  virtual DemangleResult DemangleName(const string& mangled,
+                                      string* demangled) const {
+#if defined(__ANDROID__)
+    // Android NDK doesn't provide abi::__cxa_demangle.
+    demangled->clear();
+    return kDontDemangle;
+#else
+    // Attempting to demangle non-C++ symbols with the C++ demangler would print
+    // warnings and fail, so return kDontDemangle for these.
+    if (!IsMangledName(mangled)) {
+      demangled->clear();
+      return kDontDemangle;
+    }
+
+    int status;
+    char* demangled_c =
+        abi::__cxa_demangle(mangled.c_str(), NULL, NULL, &status);
+
+    DemangleResult result;
+    if (status == 0) {
+      result = kDemangleSuccess;
+      demangled->assign(demangled_c);
+    } else {
+      result = kDemangleFailure;
+      demangled->clear();
+    }
+
+    if (demangled_c) {
+      free(reinterpret_cast<void*>(demangled_c));
+    }
+
+    return result;
+#endif
+  }
+
+ private:
+  static bool IsMangledName(const string& name) {
+    // NOTE: For proper cross-compilation support, this should depend on target
+    // binary's platform, not current build platform.
+#if defined(__APPLE__)
+    // Mac C++ symbols can have up to 4 underscores, followed by a "Z".
+    // Non-C++ symbols are not coded that way, but may have leading underscores.
+    size_t i = name.find_first_not_of('_');
+    return i > 0 && i != string::npos && i <= 4 && name[i] == 'Z';
+#else
+    // Linux C++ symbols always start with "_Z".
+    return name.size() > 2 && name[0] == '_' && name[1] == 'Z';
+#endif
+  }
+};
+
+CPPLanguage CPPLanguageSingleton;
+
+// Java language-specific operations.
+class JavaLanguage: public Language {
+ public:
+  JavaLanguage() {}
+
+  string MakeQualifiedName(const string& parent_name,
+                           const string& name) const {
+    return MakeQualifiedNameWithSeparator(parent_name, ".", name);
+  }
+};
+
+JavaLanguage JavaLanguageSingleton;
+
+// Swift language-specific operations.
+class SwiftLanguage: public Language {
+ public:
+  SwiftLanguage() {}
+
+  string MakeQualifiedName(const string& parent_name,
+                           const string& name) const {
+    return MakeQualifiedNameWithSeparator(parent_name, ".", name);
+  }
+
+  virtual DemangleResult DemangleName(const string& mangled,
+                                      string* demangled) const {
+    // There is no programmatic interface to a Swift demangler. Pass through the
+    // mangled form because it encodes more information than the qualified name
+    // that would have been built by MakeQualifiedName(). The output can be
+    // post-processed by xcrun swift-demangle to transform mangled Swift names
+    // into something more readable.
+    demangled->assign(mangled);
+    return kDemangleSuccess;
+  }
+};
+
+SwiftLanguage SwiftLanguageSingleton;
+
+// Rust language-specific operations.
+class RustLanguage: public Language {
+ public:
+  RustLanguage() {}
+
+  string MakeQualifiedName(const string& parent_name,
+                           const string& name) const {
+    return MakeQualifiedNameWithSeparator(parent_name, ".", name);
+  }
+
+  virtual DemangleResult DemangleName(const string& mangled,
+                                      string* demangled) const {
+    // Rust names use GCC C++ name mangling, but demangling them with
+    // abi_demangle doesn't produce stellar results due to them having
+    // another layer of encoding.
+    // If callers provide rustc-demangle, use that.
+#if defined(HAVE_RUSTC_DEMANGLE)
+    std::array<char, 1 * 1024 * 1024> rustc_demangled;
+    if (rustc_demangle(mangled.c_str(), rustc_demangled.data(),
+                       rustc_demangled.size()) == 0) {
+      return kDemangleFailure;
+    }
+    demangled->assign(rustc_demangled.data());
+#else
+    // Otherwise, pass through the mangled name so callers can demangle
+    // after the fact.
+    demangled->assign(mangled);
+#endif
+    return kDemangleSuccess;
+  }
+};
+
+RustLanguage RustLanguageSingleton;
+
+// Assembler language-specific operations.
+class AssemblerLanguage: public Language {
+ public:
+  AssemblerLanguage() {}
+
+  bool HasFunctions() const { return false; }
+  string MakeQualifiedName(const string& parent_name,
+                           const string& name) const {
+    return name;
+  }
+};
+
+AssemblerLanguage AssemblerLanguageSingleton;
+
+const Language * const Language::CPlusPlus = &CPPLanguageSingleton;
+const Language * const Language::Java = &JavaLanguageSingleton;
+const Language * const Language::Swift = &SwiftLanguageSingleton;
+const Language * const Language::Rust = &RustLanguageSingleton;
+const Language * const Language::Assembler = &AssemblerLanguageSingleton;
+
+} // namespace google_breakpad