PrettyStackTrace.cpp File Reference

#include "llvm/Support/PrettyStackTrace.h"
#include "llvm-c/ErrorHandling.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 is an optimization pass for GlobalISel generic memory operations.

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 155 of file PrettyStackTrace.cpp.

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

Referenced by RegisterCrashPrinter().

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 102 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 195 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 81 of file PrettyStackTrace.cpp.

References PrettyStackTraceHead, and llvm::ReverseStackTrace().

Referenced by PrintCurStackTrace().

RegisterCrashPrinter()

static bool RegisterCrashPrinter ( )

static

Definition at line 274 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 134 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 40 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 67 of file PrettyStackTrace.cpp.

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

PrettyStackTraceHead

LLVM_THREAD_LOCAL PrettyStackTraceEntry* PrettyStackTraceHead = nullptr

static

Definition at line 53 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 69 of file PrettyStackTrace.cpp.

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