d813309e03
Summary: We had a bug where if we had forked (in the ProcessLauncherPosixFork) while another thread was writing a log message, we would deadlock. This happened because the fork child inherited the locked log rwmutex, which would never get unlocked. This meant the child got stuck trying to disable all log channels. The bug existed for a while but only started being apparent after D37930, which started using ThreadLauncher (which uses logging) instead of std::thread (which does not) for launching TaskPool threads. The fix is to use pthread_atfork to disable logging in the forked child. Reviewers: zturner, eugene, clayborg Subscribers: lldb-commits Differential Revision: https://reviews.llvm.org/D38938 llvm-svn: 316368
128 lines
4.2 KiB
C++
128 lines
4.2 KiB
C++
//===-- SystemInitializerCommon.cpp -----------------------------*- C++ -*-===//
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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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#include "lldb/Initialization/SystemInitializerCommon.h"
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#include "Plugins/Instruction/ARM/EmulateInstructionARM.h"
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#include "Plugins/Instruction/MIPS/EmulateInstructionMIPS.h"
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#include "Plugins/Instruction/MIPS64/EmulateInstructionMIPS64.h"
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#include "Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.h"
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#include "Plugins/ObjectContainer/Universal-Mach-O/ObjectContainerUniversalMachO.h"
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#include "Plugins/ObjectFile/ELF/ObjectFileELF.h"
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#include "Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h"
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#include "Plugins/Process/gdb-remote/ProcessGDBRemoteLog.h"
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#include "lldb/Host/Host.h"
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#include "lldb/Host/HostInfo.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/Utility/Timer.h"
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#if defined(__APPLE__)
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#include "Plugins/ObjectFile/Mach-O/ObjectFileMachO.h"
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#endif
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#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
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#include "Plugins/Process/POSIX/ProcessPOSIXLog.h"
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#endif
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#if defined(_MSC_VER)
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#include "Plugins/Process/Windows/Common/ProcessWindowsLog.h"
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#include "lldb/Host/windows/windows.h"
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#endif
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/TargetSelect.h"
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#include <string>
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using namespace lldb_private;
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SystemInitializerCommon::SystemInitializerCommon() {}
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SystemInitializerCommon::~SystemInitializerCommon() {}
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void SystemInitializerCommon::Initialize() {
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#if defined(_MSC_VER)
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const char *disable_crash_dialog_var = getenv("LLDB_DISABLE_CRASH_DIALOG");
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if (disable_crash_dialog_var &&
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llvm::StringRef(disable_crash_dialog_var).equals_lower("true")) {
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// This will prevent Windows from displaying a dialog box requiring user
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// interaction when
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// LLDB crashes. This is mostly useful when automating LLDB, for example
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// via the test
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// suite, so that a crash in LLDB does not prevent completion of the test
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// suite.
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::SetErrorMode(GetErrorMode() | SEM_FAILCRITICALERRORS |
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SEM_NOGPFAULTERRORBOX);
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_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
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_CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
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_CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
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_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
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_CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
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_CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
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}
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#endif
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llvm::EnablePrettyStackTrace();
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Log::Initialize();
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HostInfo::Initialize();
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static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
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Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
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process_gdb_remote::ProcessGDBRemoteLog::Initialize();
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// Initialize plug-ins
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ObjectContainerBSDArchive::Initialize();
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ObjectFileELF::Initialize();
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ObjectFilePECOFF::Initialize();
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EmulateInstructionARM::Initialize();
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EmulateInstructionMIPS::Initialize();
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EmulateInstructionMIPS64::Initialize();
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//----------------------------------------------------------------------
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// Apple/Darwin hosted plugins
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//----------------------------------------------------------------------
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ObjectContainerUniversalMachO::Initialize();
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#if defined(__APPLE__)
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ObjectFileMachO::Initialize();
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#endif
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#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__)
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ProcessPOSIXLog::Initialize();
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#endif
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#if defined(_MSC_VER)
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ProcessWindowsLog::Initialize();
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#endif
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}
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void SystemInitializerCommon::Terminate() {
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static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
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Timer scoped_timer(func_cat, LLVM_PRETTY_FUNCTION);
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ObjectContainerBSDArchive::Terminate();
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ObjectFileELF::Terminate();
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ObjectFilePECOFF::Terminate();
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EmulateInstructionARM::Terminate();
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EmulateInstructionMIPS::Terminate();
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EmulateInstructionMIPS64::Terminate();
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ObjectContainerUniversalMachO::Terminate();
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#if defined(__APPLE__)
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ObjectFileMachO::Terminate();
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#endif
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#if defined(_MSC_VER)
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ProcessWindowsLog::Terminate();
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#endif
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HostInfo::Terminate();
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Log::DisableAllLogChannels();
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}
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