PrettyStackTrace.cpp File Reference

#include "llvm/Support/PrettyStackTrace.h"
#include "llvm-c/ErrorHandling.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Config/config.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/SaveAndRestore.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/Watchdog.h"
#include "llvm/Support/raw_ostream.h"
#include <atomic>
#include <cassert>
#include <cstdarg>
#include <cstdio>
#include <cstring>
#include <tuple>

Include dependency graph for PrettyStackTrace.cpp:

Go to the source code of this file.

Namespaces
	llvm
	This class represents lattice values for constants.

Functions
PrettyStackTraceEntry *	llvm::ReverseStackTrace (PrettyStackTraceEntry *Head)
static void	PrintStack (raw_ostream &OS)
static LLVM_ATTRIBUTE_NOINLINE void	PrintCurStackTrace (raw_ostream &OS)
	Print the current stack trace to the specified stream. More...
static void	setCrashLogMessage (const char *msg) LLVM_ATTRIBUTE_UNUSED
static void	CrashHandler (void *)
	This callback is run if a fatal signal is delivered to the process, it prints the pretty stack trace. More...
static void	printForSigInfoIfNeeded ()
static bool	RegisterCrashPrinter ()
void	LLVMEnablePrettyStackTrace ()
	Enable LLVM's built-in stack trace code. More...

Variables
static const char *	BugReportMsg
static LLVM_THREAD_LOCAL PrettyStackTraceEntry *	PrettyStackTraceHead = nullptr
static volatile std::atomic< unsigned >	GlobalSigInfoGenerationCounter
static LLVM_THREAD_LOCAL unsigned	ThreadLocalSigInfoGenerationCounter = 0

Function Documentation

CrashHandler()

static void CrashHandler ( void *  )

static

This callback is run if a fatal signal is delivered to the process, it prints the pretty stack trace.

Definition at line 152 of file PrettyStackTrace.cpp.

References BugReportMsg, llvm::errs(), PrintCurStackTrace(), and setCrashLogMessage().

Referenced by RegisterCrashPrinter().

LLVMEnablePrettyStackTrace()

void LLVMEnablePrettyStackTrace

(

void

)

Enable LLVM's built-in stack trace code.

This intercepts the OS's crash signals and prints which component of LLVM you were in at the time if the crash.

Definition at line 322 of file PrettyStackTrace.cpp.

References llvm::EnablePrettyStackTrace().

PrintCurStackTrace()

static LLVM_ATTRIBUTE_NOINLINE void PrintCurStackTrace ( raw_ostream &  OS )

static

Print the current stack trace to the specified stream.

Marked NOINLINE so it can be called from debuggers.

Definition at line 99 of file PrettyStackTrace.cpp.

References llvm::raw_ostream::flush(), PrettyStackTraceHead, and PrintStack().

Referenced by CrashHandler(), and printForSigInfoIfNeeded().

printForSigInfoIfNeeded()

static void printForSigInfoIfNeeded ( )

static

Definition at line 192 of file PrettyStackTrace.cpp.

References llvm::errs(), GlobalSigInfoGenerationCounter, PrintCurStackTrace(), and ThreadLocalSigInfoGenerationCounter.

Referenced by llvm::PrettyStackTraceEntry::PrettyStackTraceEntry(), and llvm::PrettyStackTraceEntry::~PrettyStackTraceEntry().

PrintStack()

static void PrintStack ( raw_ostream &  OS )

static

Definition at line 78 of file PrettyStackTrace.cpp.

References PrettyStackTraceHead, and llvm::ReverseStackTrace().

Referenced by PrintCurStackTrace().

RegisterCrashPrinter()

static bool RegisterCrashPrinter ( )

static

Definition at line 271 of file PrettyStackTrace.cpp.

References llvm::sys::AddSignalHandler(), and CrashHandler().

Referenced by llvm::EnablePrettyStackTrace().

setCrashLogMessage()

static void setCrashLogMessage ( const char *  msg )

static

Definition at line 131 of file PrettyStackTrace.cpp.

Referenced by CrashHandler().

Variable Documentation

BugReportMsg

const char* BugReportMsg

static

Initial value:

=
    "PLEASE submit a bug report to " BUG_REPORT_URL
    " and include the crash backtrace.\n"

Definition at line 37 of file PrettyStackTrace.cpp.

Referenced by CrashHandler(), llvm::getBugReportMsg(), and llvm::setBugReportMsg().

GlobalSigInfoGenerationCounter

volatile std::atomic<unsigned> GlobalSigInfoGenerationCounter

static

Initial value:

=
    ATOMIC_VAR_INIT(1)

Definition at line 64 of file PrettyStackTrace.cpp.

Referenced by llvm::EnablePrettyStackTraceOnSigInfoForThisThread(), and printForSigInfoIfNeeded().

PrettyStackTraceHead

LLVM_THREAD_LOCAL PrettyStackTraceEntry* PrettyStackTraceHead = nullptr

static

Definition at line 50 of file PrettyStackTrace.cpp.

Referenced by llvm::PrettyStackTraceEntry::PrettyStackTraceEntry(), PrintCurStackTrace(), PrintStack(), llvm::RestorePrettyStackState(), llvm::SavePrettyStackState(), and llvm::PrettyStackTraceEntry::~PrettyStackTraceEntry().

ThreadLocalSigInfoGenerationCounter

LLVM_THREAD_LOCAL unsigned ThreadLocalSigInfoGenerationCounter = 0

static

Definition at line 66 of file PrettyStackTrace.cpp.

Referenced by llvm::EnablePrettyStackTraceOnSigInfoForThisThread(), and printForSigInfoIfNeeded().