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51 lines
2.1 KiB
C++
51 lines
2.1 KiB
C++
// Copyright 2024 The Abseil Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef ABSL_DEBUGGING_INTERNAL_DEMANGLE_RUST_H_
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#define ABSL_DEBUGGING_INTERNAL_DEMANGLE_RUST_H_
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#include <cstddef>
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#include "absl/base/config.h"
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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namespace debugging_internal {
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// Demangle the Rust encoding `mangled`. On success, return true and write the
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// demangled symbol name to `out`. Otherwise, return false, leaving unspecified
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// contents in `out`. For example, calling DemangleRustSymbolEncoding with
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// `mangled = "_RNvC8my_crate7my_func"` will yield `my_crate::my_func` in `out`,
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// provided `out_size` is large enough for that value and its trailing NUL.
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//
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// DemangleRustSymbolEncoding is async-signal-safe and runs in bounded C++
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// call-stack space. It is suitable for symbolizing stack traces in a signal
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// handler.
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//
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// Note that this demangler purposefully omits some details: generic argument
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// lists become `<>`, function types `fn...`, and long tuples `(t, u, v, ...)`.
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// This simplification suits crash backtracing, where the signal handler must
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// not `malloc`, and the human troubleshooter won't want the `file:line` blame
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// drowned in generic arguments. Applications better served by a freely
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// allocating detailed demangler might prefer to use Rust's own `rustc-demangle`
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// crate.
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bool DemangleRustSymbolEncoding(const char* mangled, char* out,
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size_t out_size);
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} // namespace debugging_internal
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ABSL_NAMESPACE_END
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} // namespace absl
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#endif // ABSL_DEBUGGING_INTERNAL_DEMANGLE_RUST_H_
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