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subsequent changes are easier to review. About to fix some layering issues, and wanted to separate out the necessary churn. Also comment and sink the include of "Windows.h" in three .inc files to match the usage in Memory.inc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198685 91177308-0d34-0410-b5e6-96231b3b80d8
152 lines
4.6 KiB
C++
152 lines
4.6 KiB
C++
//===- PrettyStackTrace.cpp - Pretty Crash Handling -----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines some helpful functions for dealing with the possibility of
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// Unix signals occurring while your program is running.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm-c/Core.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Config/config.h" // Get autoconf configuration settings
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/ThreadLocal.h"
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#include "llvm/Support/Watchdog.h"
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#include "llvm/Support/raw_ostream.h"
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#ifdef HAVE_CRASHREPORTERCLIENT_H
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#include <CrashReporterClient.h>
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#endif
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using namespace llvm;
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static ManagedStatic<sys::ThreadLocal<const PrettyStackTraceEntry> > PrettyStackTraceHead;
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static unsigned PrintStack(const PrettyStackTraceEntry *Entry, raw_ostream &OS){
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unsigned NextID = 0;
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if (Entry->getNextEntry())
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NextID = PrintStack(Entry->getNextEntry(), OS);
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OS << NextID << ".\t";
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{
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sys::Watchdog W(5);
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Entry->print(OS);
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}
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return NextID+1;
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}
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/// PrintCurStackTrace - Print the current stack trace to the specified stream.
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static void PrintCurStackTrace(raw_ostream &OS) {
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// Don't print an empty trace.
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if (PrettyStackTraceHead->get() == 0) return;
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// If there are pretty stack frames registered, walk and emit them.
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OS << "Stack dump:\n";
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PrintStack(PrettyStackTraceHead->get(), OS);
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OS.flush();
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}
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// Integrate with crash reporter libraries.
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#if defined (__APPLE__) && HAVE_CRASHREPORTERCLIENT_H
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// If any clients of llvm try to link to libCrashReporterClient.a themselves,
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// only one crash info struct will be used.
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extern "C" {
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CRASH_REPORTER_CLIENT_HIDDEN
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struct crashreporter_annotations_t gCRAnnotations
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__attribute__((section("__DATA," CRASHREPORTER_ANNOTATIONS_SECTION)))
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= { CRASHREPORTER_ANNOTATIONS_VERSION, 0, 0, 0, 0, 0, 0 };
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}
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#elif defined (__APPLE__) && HAVE_CRASHREPORTER_INFO
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static const char *__crashreporter_info__ = 0;
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asm(".desc ___crashreporter_info__, 0x10");
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#endif
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/// CrashHandler - This callback is run if a fatal signal is delivered to the
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/// process, it prints the pretty stack trace.
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static void CrashHandler(void *) {
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#ifndef __APPLE__
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// On non-apple systems, just emit the crash stack trace to stderr.
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PrintCurStackTrace(errs());
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#else
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// Otherwise, emit to a smallvector of chars, send *that* to stderr, but also
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// put it into __crashreporter_info__.
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SmallString<2048> TmpStr;
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{
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raw_svector_ostream Stream(TmpStr);
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PrintCurStackTrace(Stream);
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}
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if (!TmpStr.empty()) {
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#ifdef HAVE_CRASHREPORTERCLIENT_H
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// Cast to void to avoid warning.
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(void)CRSetCrashLogMessage(std::string(TmpStr.str()).c_str());
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#elif HAVE_CRASHREPORTER_INFO
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__crashreporter_info__ = strdup(std::string(TmpStr.str()).c_str());
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#endif
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errs() << TmpStr.str();
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}
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#endif
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}
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PrettyStackTraceEntry::PrettyStackTraceEntry() {
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// Link ourselves.
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NextEntry = PrettyStackTraceHead->get();
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PrettyStackTraceHead->set(this);
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}
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PrettyStackTraceEntry::~PrettyStackTraceEntry() {
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// Do nothing if PrettyStackTraceHead is uninitialized. This can only happen
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// if a shutdown occurred after we created the PrettyStackTraceEntry. That
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// does occur in the following idiom:
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//
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// PrettyStackTraceProgram X(...);
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// llvm_shutdown_obj Y;
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//
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// Without this check, we may end up removing ourselves from the stack trace
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// after PrettyStackTraceHead has already been destroyed.
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if (!PrettyStackTraceHead.isConstructed())
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return;
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assert(PrettyStackTraceHead->get() == this &&
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"Pretty stack trace entry destruction is out of order");
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PrettyStackTraceHead->set(getNextEntry());
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}
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void PrettyStackTraceString::print(raw_ostream &OS) const {
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OS << Str << "\n";
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}
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void PrettyStackTraceProgram::print(raw_ostream &OS) const {
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OS << "Program arguments: ";
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// Print the argument list.
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for (unsigned i = 0, e = ArgC; i != e; ++i)
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OS << ArgV[i] << ' ';
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OS << '\n';
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}
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static bool RegisterCrashPrinter() {
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sys::AddSignalHandler(CrashHandler, 0);
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return false;
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}
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void llvm::EnablePrettyStackTrace() {
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// The first time this is called, we register the crash printer.
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static bool HandlerRegistered = RegisterCrashPrinter();
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(void)HandlerRegistered;
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}
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void LLVMEnablePrettyStackTrace() {
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EnablePrettyStackTrace();
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}
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