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//===- llvm/Support/PrettyStackTrace.h - Pretty Crash Handling --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the PrettyStackTraceEntry class, which is used to make
// crashes give more contextual information about what the program was doing
// when it crashed.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_PRETTYSTACKTRACE_H
#define LLVM_SUPPORT_PRETTYSTACKTRACE_H
#include "llvm/Support/Compiler.h"
namespace llvm {
class raw_ostream;
/// DisablePrettyStackTrace - Set this to true to disable this module. This
/// might be necessary if the host application installs its own signal
/// handlers which conflict with the ones installed by this module.
/// Defaults to false.
extern bool DisablePrettyStackTrace;
/// PrettyStackTraceEntry - This class is used to represent a frame of the
/// "pretty" stack trace that is dumped when a program crashes. You can define
/// subclasses of this and declare them on the program stack: when they are
/// constructed and destructed, they will add their symbolic frames to a
/// virtual stack trace. This gets dumped out if the program crashes.
class PrettyStackTraceEntry {
const PrettyStackTraceEntry *NextEntry;
PrettyStackTraceEntry(const PrettyStackTraceEntry &) LLVM_DELETED_FUNCTION;
void operator=(const PrettyStackTraceEntry&) LLVM_DELETED_FUNCTION;
public:
PrettyStackTraceEntry();
virtual ~PrettyStackTraceEntry();
/// print - Emit information about this stack frame to OS.
virtual void print(raw_ostream &OS) const = 0;
/// getNextEntry - Return the next entry in the list of frames.
const PrettyStackTraceEntry *getNextEntry() const { return NextEntry; }
};
/// PrettyStackTraceString - This object prints a specified string (which
/// should not contain newlines) to the stream as the stack trace when a crash
/// occurs.
class PrettyStackTraceString : public PrettyStackTraceEntry {
const char *Str;
public:
PrettyStackTraceString(const char *str) : Str(str) {}
virtual void print(raw_ostream &OS) const LLVM_OVERRIDE;
};
/// PrettyStackTraceProgram - This object prints a specified program arguments
/// to the stream as the stack trace when a crash occurs.
class PrettyStackTraceProgram : public PrettyStackTraceEntry {
int ArgC;
const char *const *ArgV;
public:
PrettyStackTraceProgram(int argc, const char * const*argv)
: ArgC(argc), ArgV(argv) {}
virtual void print(raw_ostream &OS) const LLVM_OVERRIDE;
};
} // end namespace llvm
#endif
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