Signals.cpp File Reference

#include "llvm/Support/Signals.h"
#include "DebugOptions.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorOr.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FileUtilities.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/StringSaver.h"
#include "llvm/Support/raw_ostream.h"
#include <array>
#include <cmath>
#include <vector>
#include "Unix/Signals.inc"

Go to the source code of this file.

Classes
struct	CallbackAndCookie

Functions
static std::array< CallbackAndCookie, MaxSignalHandlerCallbacks > &	CallBacksToRun ()
static void	insertSignalHandler (sys::SignalHandlerCallback FnPtr, void *Cookie)
static bool	findModulesAndOffsets (void **StackTrace, int Depth, const char **Modules, intptr_t *Offsets, const char *MainExecutableName, StringSaver &StrPool)
static FormattedNumber	format_ptr (void *PC)
	Format a pointer value as hexadecimal.
static LLVM_ATTRIBUTE_USED bool	printSymbolizedStackTrace (StringRef Argv0, void **StackTrace, int Depth, llvm::raw_ostream &OS)
	Helper that launches llvm-symbolizer and symbolizes a backtrace.
static bool	printMarkupContext (raw_ostream &OS, const char *MainExecutableName)
static LLVM_ATTRIBUTE_USED bool	printMarkupStackTrace (StringRef Argv0, void **StackTrace, int Depth, raw_ostream &OS)

Variables
static bool	DisableSymbolicationFlag = false
static ManagedStatic< std::string >	CrashDiagnosticsDirectory
constexpr char	DisableSymbolizationEnv [] = "LLVM_DISABLE_SYMBOLIZATION"
constexpr char	LLVMSymbolizerPathEnv [] = "LLVM_SYMBOLIZER_PATH"
constexpr char	EnableSymbolizerMarkupEnv [] = "LLVM_ENABLE_SYMBOLIZER_MARKUP"
static constexpr size_t	MaxSignalHandlerCallbacks = 8

Function Documentation

CallBacksToRun()

static std::array< CallbackAndCookie, MaxSignalHandlerCallbacks > & CallBacksToRun ( )

static

Definition at line 92 of file Signals.cpp.

Referenced by insertSignalHandler(), and llvm::sys::RunSignalHandlers().

findModulesAndOffsets()

static bool findModulesAndOffsets ( void **  StackTrace, int  Depth, const char **  Modules, intptr_t *  Offsets, const char *  MainExecutableName, StringSaver &  StrPool  )

static

Referenced by printSymbolizedStackTrace().

format_ptr()

static FormattedNumber format_ptr ( void *  PC )

static

Format a pointer value as hexadecimal.

Zero pad it out so its always the same width.

Definition at line 134 of file Signals.cpp.

References llvm::format_hex().

Referenced by printSymbolizedStackTrace().

insertSignalHandler()

static void insertSignalHandler ( sys::SignalHandlerCallback  FnPtr, void *  Cookie  )

static

Definition at line 112 of file Signals.cpp.

References CallBacksToRun(), CallbackAndCookie::Empty, CallbackAndCookie::Initialized, CallbackAndCookie::Initializing, and llvm::report_fatal_error().

printMarkupContext()

static bool printMarkupContext ( raw_ostream &  OS, const char *  MainExecutableName  )

static

Referenced by printMarkupStackTrace().

printMarkupStackTrace()

static LLVM_ATTRIBUTE_USED bool printMarkupStackTrace ( StringRef  Argv0, void **  StackTrace, int  Depth, raw_ostream &  OS  )

static

Definition at line 259 of file Signals.cpp.

References llvm::Depth, EnableSymbolizerMarkupEnv, llvm::sys::fs::exists(), llvm::format(), llvm::sys::fs::getMainExecutable(), I, OS, and printMarkupContext().

printSymbolizedStackTrace()

static LLVM_ATTRIBUTE_USED bool printSymbolizedStackTrace ( StringRef  Argv0, void **  StackTrace, int  Depth, llvm::raw_ostream &  OS  )

static

Helper that launches llvm-symbolizer and symbolizes a backtrace.

Definition at line 142 of file Signals.cpp.

References Allocator, llvm::SmallString< InternalLen >::c_str(), llvm::StringRef::contains(), llvm::sys::fs::createTemporaryFile(), llvm::Depth, DisableSymbolicationFlag, DisableSymbolizationEnv, llvm::StringRef::empty(), llvm::sys::ExecuteAndWait(), llvm::sys::fs::exists(), findModulesAndOffsets(), llvm::sys::findProgramByName(), llvm::format_hex(), format_ptr(), llvm::formatv(), llvm::MemoryBuffer::getFile(), llvm::sys::fs::getMainExecutable(), LLVMSymbolizerPathEnv, OS, llvm::sys::path::parent_path(), llvm::right_justify(), llvm::StringRef::split(), llvm::StringRef::starts_with(), and llvm::SmallString< InternalLen >::str().

Variable Documentation

CrashDiagnosticsDirectory

ManagedStatic<std::string> CrashDiagnosticsDirectory

static

Definition at line 45 of file Signals.cpp.

DisableSymbolicationFlag

bool DisableSymbolicationFlag = false

static

Definition at line 44 of file Signals.cpp.

Referenced by printSymbolizedStackTrace().

DisableSymbolizationEnv

constexpr char DisableSymbolizationEnv[] = "LLVM_DISABLE_SYMBOLIZATION"

constexpr

Definition at line 73 of file Signals.cpp.

Referenced by printSymbolizedStackTrace().

EnableSymbolizerMarkupEnv

constexpr char EnableSymbolizerMarkupEnv[] = "LLVM_ENABLE_SYMBOLIZER_MARKUP"

constexpr

Definition at line 75 of file Signals.cpp.

Referenced by printMarkupStackTrace().

LLVMSymbolizerPathEnv

constexpr char LLVMSymbolizerPathEnv[] = "LLVM_SYMBOLIZER_PATH"

constexpr

Definition at line 74 of file Signals.cpp.

Referenced by printSymbolizedStackTrace().

MaxSignalHandlerCallbacks

constexpr size_t MaxSignalHandlerCallbacks = 8

staticconstexpr

Definition at line 87 of file Signals.cpp.