1/*
2 * Copyright 2018-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <folly/detail/SingletonStackTrace.h>
18
19#include <folly/portability/Config.h>
20
21#if FOLLY_USE_SYMBOLIZER
22#include <folly/experimental/symbolizer/Symbolizer.h> // @manual
23#endif
24
25namespace folly {
26namespace detail {
27
28std::string getSingletonStackTrace() {
29#if FOLLY_USE_SYMBOLIZER
30
31 // Get and symbolize stack trace
32 constexpr size_t kMaxStackTraceDepth = 100;
33 symbolizer::FrameArray<kMaxStackTraceDepth> addresses;
34
35 if (!getStackTraceSafe(addresses)) {
36 return "";
37 } else {
38 constexpr size_t kDefaultCapacity = 500;
39 symbolizer::ElfCache elfCache(kDefaultCapacity);
40
41 symbolizer::Symbolizer symbolizer(&elfCache);
42 symbolizer.symbolize(addresses);
43
44 symbolizer::StringSymbolizePrinter printer;
45 printer.println(addresses);
46 return printer.str();
47 }
48
49#else
50
51 return "";
52
53#endif
54}
55
56} // namespace detail
57} // namespace folly
58