Signals.h revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f 
1//===- llvm/Support/Signals.h - Signal Handling support ----------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file defines some helpful functions for dealing with the possibility of
11// unix signals occurring while your program is running.
12//
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_SUPPORT_SIGNALS_H
16#define LLVM_SUPPORT_SIGNALS_H
17
18#include "llvm/Support/Path.h"
19#include <cstdio>
20
21namespace llvm {
22namespace sys {
23
24  /// This function runs all the registered interrupt handlers, including the
25  /// removal of files registered by RemoveFileOnSignal.
26  void RunInterruptHandlers();
27
28  /// This function registers signal handlers to ensure that if a signal gets
29  /// delivered that the named file is removed.
30  /// @brief Remove a file if a fatal signal occurs.
31  bool RemoveFileOnSignal(StringRef Filename, std::string* ErrMsg = nullptr);
32
33  /// This function removes a file from the list of files to be removed on
34  /// signal delivery.
35  void DontRemoveFileOnSignal(StringRef Filename);
36
37  /// When an error signal (such as SIBABRT or SIGSEGV) is delivered to the
38  /// process, print a stack trace and then exit.
39  /// @brief Print a stack trace if a fatal signal occurs.
40  void PrintStackTraceOnErrorSignal();
41
42  /// \brief Print the stack trace using the given \c FILE object.
43  void PrintStackTrace(FILE *);
44
45  /// AddSignalHandler - Add a function to be called when an abort/kill signal
46  /// is delivered to the process.  The handler can have a cookie passed to it
47  /// to identify what instance of the handler it is.
48  void AddSignalHandler(void (*FnPtr)(void *), void *Cookie);
49
50  /// This function registers a function to be called when the user "interrupts"
51  /// the program (typically by pressing ctrl-c).  When the user interrupts the
52  /// program, the specified interrupt function is called instead of the program
53  /// being killed, and the interrupt function automatically disabled.  Note
54  /// that interrupt functions are not allowed to call any non-reentrant
55  /// functions.  An null interrupt function pointer disables the current
56  /// installed function.  Note also that the handler may be executed on a
57  /// different thread on some platforms.
58  /// @brief Register a function to be called when ctrl-c is pressed.
59  void SetInterruptFunction(void (*IF)());
60} // End sys namespace
61} // End llvm namespace
62
63#endif
64