fc8dc48020
git-subtree-dir: third_party/abseil_cpp git-subtree-mainline:ffb2ae54begit-subtree-split:768eb2ca28
71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
// Copyright 2018 The Abseil Authors.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// An async-signal-safe and thread-safe demangler for Itanium C++ ABI
|
|
// (aka G++ V3 ABI).
|
|
//
|
|
// The demangler is implemented to be used in async signal handlers to
|
|
// symbolize stack traces. We cannot use libstdc++'s
|
|
// abi::__cxa_demangle() in such signal handlers since it's not async
|
|
// signal safe (it uses malloc() internally).
|
|
//
|
|
// Note that this demangler doesn't support full demangling. More
|
|
// specifically, it doesn't print types of function parameters and
|
|
// types of template arguments. It just skips them. However, it's
|
|
// still very useful to extract basic information such as class,
|
|
// function, constructor, destructor, and operator names.
|
|
//
|
|
// See the implementation note in demangle.cc if you are interested.
|
|
//
|
|
// Example:
|
|
//
|
|
// | Mangled Name | The Demangler | abi::__cxa_demangle()
|
|
// |---------------|---------------|-----------------------
|
|
// | _Z1fv | f() | f()
|
|
// | _Z1fi | f() | f(int)
|
|
// | _Z3foo3bar | foo() | foo(bar)
|
|
// | _Z1fIiEvi | f<>() | void f<int>(int)
|
|
// | _ZN1N1fE | N::f | N::f
|
|
// | _ZN3Foo3BarEv | Foo::Bar() | Foo::Bar()
|
|
// | _Zrm1XS_" | operator%() | operator%(X, X)
|
|
// | _ZN3FooC1Ev | Foo::Foo() | Foo::Foo()
|
|
// | _Z1fSs | f() | f(std::basic_string<char,
|
|
// | | | std::char_traits<char>,
|
|
// | | | std::allocator<char> >)
|
|
//
|
|
// See the unit test for more examples.
|
|
//
|
|
// Note: we might want to write demanglers for ABIs other than Itanium
|
|
// C++ ABI in the future.
|
|
//
|
|
|
|
#ifndef ABSL_DEBUGGING_INTERNAL_DEMANGLE_H_
|
|
#define ABSL_DEBUGGING_INTERNAL_DEMANGLE_H_
|
|
|
|
#include "absl/base/config.h"
|
|
|
|
namespace absl {
|
|
ABSL_NAMESPACE_BEGIN
|
|
namespace debugging_internal {
|
|
|
|
// Demangle `mangled`. On success, return true and write the
|
|
// demangled symbol name to `out`. Otherwise, return false.
|
|
// `out` is modified even if demangling is unsuccessful.
|
|
bool Demangle(const char *mangled, char *out, int out_size);
|
|
|
|
} // namespace debugging_internal
|
|
ABSL_NAMESPACE_END
|
|
} // namespace absl
|
|
|
|
#endif // ABSL_DEBUGGING_INTERNAL_DEMANGLE_H_
|