mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-01 04:29:57 +00:00
since %p isn't formatted consistently, but obviously plain %x is wrong. PRIxPTR with a cast to uintptr_t would work here, but that requires inconvenient build-system changes. %lu works on all current and foreseable future hosts. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60616 91177308-0d34-0410-b5e6-96231b3b80d8
209 lines
5.9 KiB
C++
209 lines
5.9 KiB
C++
//===- Signals.cpp - Generic Unix Signals Implementation -----*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines some helpful functions for dealing with the possibility of
|
|
// Unix signals occuring while your program is running.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "Unix.h"
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include <vector>
|
|
#include <algorithm>
|
|
#if HAVE_EXECINFO_H
|
|
# include <execinfo.h> // For backtrace().
|
|
#endif
|
|
#if HAVE_SIGNAL_H
|
|
#include <signal.h>
|
|
#endif
|
|
#if HAVE_SYS_STAT_H
|
|
#include <sys/stat.h>
|
|
#endif
|
|
#if HAVE_DLFCN_H && __GNUG__
|
|
#include <dlfcn.h>
|
|
#include <cxxabi.h>
|
|
#endif
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
static bool StackTraceRequested = false;
|
|
|
|
/// InterruptFunction - The function to call if ctrl-c is pressed.
|
|
static void (*InterruptFunction)() = 0;
|
|
|
|
static std::vector<sys::Path> *FilesToRemove = 0 ;
|
|
static std::vector<sys::Path> *DirectoriesToRemove = 0;
|
|
|
|
// IntSigs - Signals that may interrupt the program at any time.
|
|
static const int IntSigs[] = {
|
|
SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGTERM, SIGUSR1, SIGUSR2
|
|
};
|
|
static const int *const IntSigsEnd =
|
|
IntSigs + sizeof(IntSigs) / sizeof(IntSigs[0]);
|
|
|
|
// KillSigs - Signals that are synchronous with the program that will cause it
|
|
// to die.
|
|
static const int KillSigs[] = {
|
|
SIGILL, SIGTRAP, SIGABRT, SIGFPE, SIGBUS, SIGSEGV, SIGSYS, SIGXCPU, SIGXFSZ
|
|
#ifdef SIGEMT
|
|
, SIGEMT
|
|
#endif
|
|
};
|
|
static const int *const KillSigsEnd =
|
|
KillSigs + sizeof(KillSigs) / sizeof(KillSigs[0]);
|
|
|
|
#ifdef HAVE_BACKTRACE
|
|
static void* StackTrace[256];
|
|
#endif
|
|
|
|
// PrintStackTrace - In the case of a program crash or fault, print out a stack
|
|
// trace so that the user has an indication of why and where we died.
|
|
//
|
|
// On glibc systems we have the 'backtrace' function, which works nicely, but
|
|
// doesn't demangle symbols.
|
|
static void PrintStackTrace() {
|
|
#ifdef HAVE_BACKTRACE
|
|
// Use backtrace() to output a backtrace on Linux systems with glibc.
|
|
int depth = backtrace(StackTrace,
|
|
static_cast<int>(array_lengthof(StackTrace)));
|
|
#if HAVE_DLFCN_H && __GNUG__
|
|
int width = 0;
|
|
for (int i = 0; i < depth; ++i) {
|
|
Dl_info dlinfo;
|
|
dladdr(StackTrace[i], &dlinfo);
|
|
char* name = strrchr(dlinfo.dli_fname, '/');
|
|
|
|
int nwidth;
|
|
if (name == NULL) nwidth = strlen(dlinfo.dli_fname);
|
|
else nwidth = strlen(name) - 1;
|
|
|
|
if (nwidth > width) width = nwidth;
|
|
}
|
|
|
|
for (int i = 0; i < depth; ++i) {
|
|
Dl_info dlinfo;
|
|
dladdr(StackTrace[i], &dlinfo);
|
|
|
|
fprintf(stderr, "%-3d", i);
|
|
|
|
char* name = strrchr(dlinfo.dli_fname, '/');
|
|
if (name == NULL) fprintf(stderr, " %-*s", width, dlinfo.dli_fname);
|
|
else fprintf(stderr, " %-*s", width, name+1);
|
|
|
|
fprintf(stderr, " %#0*lx",
|
|
(int)(sizeof(void*) * 2) + 2, (unsigned long)StackTrace[i]);
|
|
|
|
if (dlinfo.dli_sname != NULL) {
|
|
int res;
|
|
fputc(' ', stderr);
|
|
char* d = abi::__cxa_demangle(dlinfo.dli_sname, NULL, NULL, &res);
|
|
if (d == NULL) fputs(dlinfo.dli_sname, stderr);
|
|
else fputs(d, stderr);
|
|
free(d);
|
|
|
|
fprintf(stderr, " + %tu",(char*)StackTrace[i]-(char*)dlinfo.dli_saddr);
|
|
}
|
|
fputc('\n', stderr);
|
|
}
|
|
#else
|
|
backtrace_symbols_fd(StackTrace, depth, STDERR_FILENO);
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
// SignalHandler - The signal handler that runs...
|
|
static RETSIGTYPE SignalHandler(int Sig) {
|
|
if (FilesToRemove != 0)
|
|
while (!FilesToRemove->empty()) {
|
|
FilesToRemove->back().eraseFromDisk(true);
|
|
FilesToRemove->pop_back();
|
|
}
|
|
|
|
if (DirectoriesToRemove != 0)
|
|
while (!DirectoriesToRemove->empty()) {
|
|
DirectoriesToRemove->back().eraseFromDisk(true);
|
|
DirectoriesToRemove->pop_back();
|
|
}
|
|
|
|
if (std::find(IntSigs, IntSigsEnd, Sig) != IntSigsEnd) {
|
|
if (InterruptFunction) {
|
|
void (*IF)() = InterruptFunction;
|
|
InterruptFunction = 0;
|
|
IF(); // run the interrupt function.
|
|
return;
|
|
} else {
|
|
exit(1); // If this is an interrupt signal, exit the program
|
|
}
|
|
}
|
|
|
|
// Otherwise if it is a fault (like SEGV) output the stacktrace to
|
|
// STDERR (if we can) and reissue the signal to die...
|
|
if (StackTraceRequested)
|
|
PrintStackTrace();
|
|
signal(Sig, SIG_DFL);
|
|
}
|
|
|
|
// Just call signal
|
|
static void RegisterHandler(int Signal) {
|
|
signal(Signal, SignalHandler);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
void sys::SetInterruptFunction(void (*IF)()) {
|
|
InterruptFunction = IF;
|
|
RegisterHandler(SIGINT);
|
|
}
|
|
|
|
// RemoveFileOnSignal - The public API
|
|
bool sys::RemoveFileOnSignal(const sys::Path &Filename, std::string* ErrMsg) {
|
|
if (FilesToRemove == 0)
|
|
FilesToRemove = new std::vector<sys::Path>;
|
|
|
|
FilesToRemove->push_back(Filename);
|
|
|
|
std::for_each(IntSigs, IntSigsEnd, RegisterHandler);
|
|
std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
|
|
return false;
|
|
}
|
|
|
|
// RemoveDirectoryOnSignal - The public API
|
|
bool sys::RemoveDirectoryOnSignal(const sys::Path& path, std::string* ErrMsg) {
|
|
// Not a directory?
|
|
struct stat buf;
|
|
if (0 != stat(path.c_str(), &buf)) {
|
|
MakeErrMsg(ErrMsg, path.toString() + ": can't get status of file");
|
|
return true;
|
|
}
|
|
|
|
if (!S_ISDIR(buf.st_mode)) {
|
|
if (ErrMsg)
|
|
*ErrMsg = path.toString() + " is not a directory";
|
|
return true;
|
|
}
|
|
|
|
if (DirectoriesToRemove == 0)
|
|
DirectoriesToRemove = new std::vector<sys::Path>;
|
|
|
|
DirectoriesToRemove->push_back(path);
|
|
|
|
std::for_each(IntSigs, IntSigsEnd, RegisterHandler);
|
|
std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
|
|
return false;
|
|
}
|
|
|
|
/// PrintStackTraceOnErrorSignal - When an error signal (such as SIBABRT or
|
|
/// SIGSEGV) is delivered to the process, print a stack trace and then exit.
|
|
void sys::PrintStackTraceOnErrorSignal() {
|
|
StackTraceRequested = true;
|
|
std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
|
|
}
|