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85 lines
3.5 KiB
C++
85 lines
3.5 KiB
C++
// Copyright (c) 2006, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Author: Satoru Takabayashi
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//
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// An async-signal-safe and thread-safe demangler for Itanium C++ ABI
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// (aka G++ V3 ABI).
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// The demangler is implemented to be used in async signal handlers to
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// symbolize stack traces. We cannot use libstdc++'s
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// abi::__cxa_demangle() in such signal handlers since it's not async
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// signal safe (it uses malloc() internally).
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//
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// Note that this demangler doesn't support full demangling. More
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// specifically, it doesn't print types of function parameters and
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// types of template arguments. It just skips them. However, it's
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// still very useful to extract basic information such as class,
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// function, constructor, destructor, and operator names.
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//
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// See the implementation note in demangle.cc if you are interested.
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//
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// Example:
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//
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// | Mangled Name | The Demangler | abi::__cxa_demangle()
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// |---------------|---------------|-----------------------
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// | _Z1fv | f() | f()
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// | _Z1fi | f() | f(int)
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// | _Z3foo3bar | foo() | foo(bar)
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// | _Z1fIiEvi | f<>() | void f<int>(int)
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// | _ZN1N1fE | N::f | N::f
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// | _ZN3Foo3BarEv | Foo::Bar() | Foo::Bar()
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// | _Zrm1XS_" | operator%() | operator%(X, X)
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// | _ZN3FooC1Ev | Foo::Foo() | Foo::Foo()
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// | _Z1fSs | f() | f(std::basic_string<char,
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// | | | std::char_traits<char>,
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// | | | std::allocator<char> >)
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//
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// See the unit test for more examples.
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//
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// Note: we might want to write demanglers for ABIs other than Itanium
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// C++ ABI in the future.
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//
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#ifndef BASE_DEMANGLE_H_
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#define BASE_DEMANGLE_H_
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#include "config.h"
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_START_GOOGLE_NAMESPACE_
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// Demangle "mangled". On success, return true and write the
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// demangled symbol name to "out". Otherwise, return false.
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// "out" is modified even if demangling is unsuccessful.
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bool Demangle(const char *mangled, char *out, int out_size);
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_END_GOOGLE_NAMESPACE_
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#endif // BASE_DEMANGLE_H_
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