1/*
2 * Copyright 2012-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//
18// Exception tracer library.
19
20#pragma once
21
22#include <cstdint>
23#include <iosfwd>
24#include <typeinfo>
25#include <vector>
26
27namespace folly {
28namespace exception_tracer {
29
30struct ExceptionInfo {
31 const std::type_info* type{nullptr};
32 // The values in frames are IP (instruction pointer) addresses.
33 // They are only filled if the low-level exception tracer library is
34 // linked in or LD_PRELOADed.
35 std::vector<uintptr_t> frames; // front() is top of stack
36};
37
38void printExceptionInfo(
39 std::ostream& out,
40 const ExceptionInfo& info,
41 int options);
42std::ostream& operator<<(std::ostream& out, const ExceptionInfo& info);
43
44/**
45 * Get current exceptions being handled. front() is the most recent exception.
46 * There should be at most one unless rethrowing.
47 */
48std::vector<ExceptionInfo> getCurrentExceptions();
49
50/**
51 * Install the terminate / unexpected handlers to dump exceptions.
52 */
53void installHandlers();
54
55} // namespace exception_tracer
56} // namespace folly
57