1 | #pragma once |
2 | |
3 | #include <string> |
4 | #include <vector> |
5 | #include <array> |
6 | #include <optional> |
7 | #include <functional> |
8 | #include <signal.h> |
9 | |
10 | #ifdef __APPLE__ |
11 | // ucontext is not available without _XOPEN_SOURCE |
12 | # pragma clang diagnostic ignored "-Wreserved-id-macro" |
13 | # define _XOPEN_SOURCE 700 |
14 | #endif |
15 | #include <ucontext.h> |
16 | |
17 | struct NoCapture |
18 | { |
19 | }; |
20 | |
21 | /// Tries to capture current stack trace using libunwind or signal context |
22 | /// NOTE: StackTrace calculation is signal safe only if updatePHDRCache() was called beforehand. |
23 | class StackTrace |
24 | { |
25 | public: |
26 | static constexpr size_t capacity = 32; |
27 | using Frames = std::array<void *, capacity>; |
28 | |
29 | /// Tries to capture stack trace |
30 | StackTrace(); |
31 | |
32 | /// Tries to capture stack trace. Fallbacks on parsing caller address from |
33 | /// signal context if no stack trace could be captured |
34 | StackTrace(const ucontext_t & signal_context); |
35 | |
36 | /// Creates empty object for deferred initialization |
37 | StackTrace(NoCapture); |
38 | |
39 | size_t getSize() const; |
40 | size_t getOffset() const; |
41 | const Frames & getFrames() const; |
42 | std::string toString() const; |
43 | |
44 | void toStringEveryLine(std::function<void(const std::string &)> callback) const; |
45 | |
46 | protected: |
47 | void tryCapture(); |
48 | |
49 | size_t size = 0; |
50 | size_t offset = 0; /// How many frames to skip while displaying. |
51 | Frames frames{}; |
52 | }; |
53 | |
54 | std::string signalToErrorMessage(int sig, const siginfo_t & info, const ucontext_t & context); |
55 | |