forked from OSchip/llvm-project
125 lines
3.6 KiB
C++
125 lines
3.6 KiB
C++
//===- PrettyStackTrace.cpp - Pretty Crash Handling -----------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines some helpful functions for dealing with the possibility of
|
|
// Unix signals occuring while your program is running.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Config/config.h" // Get autoconf configuration settings
|
|
#include "llvm/Support/PrettyStackTrace.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include "llvm/System/Signals.h"
|
|
#include "llvm/System/ThreadLocal.h"
|
|
#include "llvm/ADT/SmallString.h"
|
|
|
|
#ifdef HAVE_CRASHREPORTERCLIENT_H
|
|
#include <CrashReporterClient.h>
|
|
#endif
|
|
|
|
using namespace llvm;
|
|
|
|
namespace llvm {
|
|
bool DisablePrettyStackTrace = false;
|
|
}
|
|
|
|
// FIXME: This should be thread local when llvm supports threads.
|
|
static sys::ThreadLocal<const PrettyStackTraceEntry> PrettyStackTraceHead;
|
|
|
|
static unsigned PrintStack(const PrettyStackTraceEntry *Entry, raw_ostream &OS){
|
|
unsigned NextID = 0;
|
|
if (Entry->getNextEntry())
|
|
NextID = PrintStack(Entry->getNextEntry(), OS);
|
|
OS << NextID << ".\t";
|
|
Entry->print(OS);
|
|
|
|
return NextID+1;
|
|
}
|
|
|
|
/// PrintCurStackTrace - Print the current stack trace to the specified stream.
|
|
static void PrintCurStackTrace(raw_ostream &OS) {
|
|
// Don't print an empty trace.
|
|
if (PrettyStackTraceHead.get() == 0) return;
|
|
|
|
// If there are pretty stack frames registered, walk and emit them.
|
|
OS << "Stack dump:\n";
|
|
|
|
PrintStack(PrettyStackTraceHead.get(), OS);
|
|
OS.flush();
|
|
}
|
|
|
|
// Integrate with crash reporter.
|
|
#if defined (__APPLE__) && !defined (HAVE_CRASHREPORTERCLIENT_H)
|
|
static const char *__crashreporter_info__ = 0;
|
|
asm(".desc ___crashreporter_info__, 0x10");
|
|
#endif
|
|
|
|
|
|
/// CrashHandler - This callback is run if a fatal signal is delivered to the
|
|
/// process, it prints the pretty stack trace.
|
|
static void CrashHandler(void *Cookie) {
|
|
#ifndef __APPLE__
|
|
// On non-apple systems, just emit the crash stack trace to stderr.
|
|
PrintCurStackTrace(errs());
|
|
#else
|
|
// Otherwise, emit to a smallvector of chars, send *that* to stderr, but also
|
|
// put it into __crashreporter_info__.
|
|
SmallString<2048> TmpStr;
|
|
{
|
|
raw_svector_ostream Stream(TmpStr);
|
|
PrintCurStackTrace(Stream);
|
|
}
|
|
|
|
if (!TmpStr.empty()) {
|
|
#ifndef HAVE_CRASHREPORTERCLIENT_H
|
|
__crashreporter_info__ = strdup(std::string(TmpStr.str()).c_str());
|
|
#else
|
|
CRSetCrashLogMessage(std::string(TmpStr.str()).c_str());
|
|
#endif
|
|
errs() << TmpStr.str();
|
|
}
|
|
|
|
#endif
|
|
}
|
|
|
|
static bool RegisterCrashPrinter() {
|
|
if (!DisablePrettyStackTrace)
|
|
sys::AddSignalHandler(CrashHandler, 0);
|
|
return false;
|
|
}
|
|
|
|
PrettyStackTraceEntry::PrettyStackTraceEntry() {
|
|
// The first time this is called, we register the crash printer.
|
|
static bool HandlerRegistered = RegisterCrashPrinter();
|
|
HandlerRegistered = HandlerRegistered;
|
|
|
|
// Link ourselves.
|
|
NextEntry = PrettyStackTraceHead.get();
|
|
PrettyStackTraceHead.set(this);
|
|
}
|
|
|
|
PrettyStackTraceEntry::~PrettyStackTraceEntry() {
|
|
assert(PrettyStackTraceHead.get() == this &&
|
|
"Pretty stack trace entry destruction is out of order");
|
|
PrettyStackTraceHead.set(getNextEntry());
|
|
}
|
|
|
|
void PrettyStackTraceString::print(raw_ostream &OS) const {
|
|
OS << Str << "\n";
|
|
}
|
|
|
|
void PrettyStackTraceProgram::print(raw_ostream &OS) const {
|
|
OS << "Program arguments: ";
|
|
// Print the argument list.
|
|
for (unsigned i = 0, e = ArgC; i != e; ++i)
|
|
OS << ArgV[i] << ' ';
|
|
OS << '\n';
|
|
}
|
|
|