1 //===- llvm/Support/PrettyStackTrace.h - Pretty Crash Handling --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the PrettyStackTraceEntry class, which is used to make
11 // crashes give more contextual information about what the program was doing
14 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_SUPPORT_PRETTYSTACKTRACE_H
17 #define LLVM_SUPPORT_PRETTYSTACKTRACE_H
19 #include "llvm/Support/Compiler.h"
24 void EnablePrettyStackTrace();
26 /// PrettyStackTraceEntry - This class is used to represent a frame of the
27 /// "pretty" stack trace that is dumped when a program crashes. You can define
28 /// subclasses of this and declare them on the program stack: when they are
29 /// constructed and destructed, they will add their symbolic frames to a
30 /// virtual stack trace. This gets dumped out if the program crashes.
31 class PrettyStackTraceEntry {
32 const PrettyStackTraceEntry *NextEntry;
33 PrettyStackTraceEntry(const PrettyStackTraceEntry &) LLVM_DELETED_FUNCTION;
34 void operator=(const PrettyStackTraceEntry&) LLVM_DELETED_FUNCTION;
36 PrettyStackTraceEntry();
37 virtual ~PrettyStackTraceEntry();
39 /// print - Emit information about this stack frame to OS.
40 virtual void print(raw_ostream &OS) const = 0;
42 /// getNextEntry - Return the next entry in the list of frames.
43 const PrettyStackTraceEntry *getNextEntry() const { return NextEntry; }
46 /// PrettyStackTraceString - This object prints a specified string (which
47 /// should not contain newlines) to the stream as the stack trace when a crash
49 class PrettyStackTraceString : public PrettyStackTraceEntry {
52 PrettyStackTraceString(const char *str) : Str(str) {}
53 void print(raw_ostream &OS) const override;
56 /// PrettyStackTraceProgram - This object prints a specified program arguments
57 /// to the stream as the stack trace when a crash occurs.
58 class PrettyStackTraceProgram : public PrettyStackTraceEntry {
60 const char *const *ArgV;
62 PrettyStackTraceProgram(int argc, const char * const*argv)
63 : ArgC(argc), ArgV(argv) {
64 EnablePrettyStackTrace();
66 void print(raw_ostream &OS) const override;
69 } // end namespace llvm