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// Copyright (c) 2010 Google Inc.
// All rights reserved.
//
// 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 Inc. 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.
#include "common/language.h"
#include <stdlib.h>
#if !defined(__ANDROID__)
#include <cxxabi.h>
#endif
#if defined(HAVE_RUST_DEMANGLE)
#include <rust_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
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
}
};
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_RUST_DEMANGLE)
char* rust_demangled = rust_demangle(mangled.c_str());
if (rust_demangled == nullptr) {
return kDemangleFailure;
}
demangled->assign(rust_demangled);
free_rust_demangled_name(rust_demangled);
#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