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 | |
25 | namespace folly { |
26 | namespace detail { |
27 | |
28 | std::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 | |