1 // Copyright 2006 Google Inc. All Rights Reserved.
2 // Author: Satoru Takabayashi
4 // An async-signal-safe and thread-safe demangler for Itanium C++ ABI
7 // The demangler is implemented to be used in async signal handlers to
8 // symbolize stack traces. We cannot use libstdc++'s
9 // abi::__cxa_demangle() in such signal handlers since it's not async
10 // signal safe (it uses malloc() internally).
12 // Note that this demangler doesn't support full demangling. More
13 // specifically, it doesn't print types of function parameters and
14 // types of template arguments. It just skips them. However, it's
15 // still very useful to extract basic information such as class,
16 // function, constructor, destructor, and operator names.
18 // See the implementation note in demangle.cc if you are interested.
22 // | Mangled Name | The Demangler | abi::__cxa_demangle()
23 // |---------------|---------------|-----------------------
24 // | _Z1fv | f() | f()
25 // | _Z1fi | f() | f(int)
26 // | _Z3foo3bar | foo() | foo(bar)
27 // | _Z1fIiEvi | f<>() | void f<int>(int)
28 // | _ZN1N1fE | N::f | N::f
29 // | _ZN3Foo3BarEv | Foo::Bar() | Foo::Bar()
30 // | _Zrm1XS_" | operator%() | operator%(X, X)
31 // | _ZN3FooC1Ev | Foo::Foo() | Foo::Foo()
32 // | _Z1fSs | f() | f(std::basic_string<char,
33 // | | | std::char_traits<char>,
34 // | | | std::allocator<char> >)
36 // See the unit test for more examples.
38 // Note: we might want to write demanglers for ABIs other than Itanium
39 // C++ ABI in the future.
42 #ifndef BASE_DEMANGLE_H_
43 #define BASE_DEMANGLE_H_
47 _START_GOOGLE_NAMESPACE_
49 // Demangle "mangled". On success, return true and write the
50 // demangled symbol name to "out". Otherwise, return false.
51 // "out" is modified even if demangling is unsuccessful.
52 bool Demangle(const char *mangled, char *out, int out_size);
54 _END_GOOGLE_NAMESPACE_
56 #endif // BASE_DEMANGLE_H_