Signals support has been moved to lib/System

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16097 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 138 deletions

diff --git a/lib/Support/Signals.cpp b/lib/Support/Signals.cpp
deleted file mode 100644
index b81de279ab..0000000000
--- a/lib/Support/Signals.cpp
+++ /dev/null
@@ -1,138 +0,0 @@
-//===- Signals.cpp - Signal Handling support ------------------------------===//
-// 
-//                     The LLVM Compiler Infrastructure
-//
-// This file was developed by the LLVM research group and 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 "llvm/System/Signals.h"
-#include <vector>
-#include <algorithm>
-#include <cstdlib>
-#include <cstdio>
-#include "Config/config.h"     // Get the signal handler return type
-#ifdef HAVE_EXECINFO_H
-# include <execinfo.h>         // For backtrace().
-#endif
-#include <signal.h>
-#include <unistd.h>
-#include <sys/wait.h>
-#include <cerrno>
-using namespace llvm;
-
-static std::vector<std::string> FilesToRemove;
-
-// IntSigs - Signals that may interrupt the program at any time.
-static const int IntSigs[] = {
-  SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGTERM, SIGUSR1, SIGUSR2
-};
-static const int *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 *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.  In order to backtrace symbols, we fork and exec a
-// 'c++filt' process to do the demangling.  This seems like the simplest and
-// most robust solution when we can't allocate memory (such as in a signal
-// handler).  If we can't find 'c++filt', we fallback to printing mangled names.
-//
-static void PrintStackTrace() {
-#ifdef HAVE_BACKTRACE
-  // Use backtrace() to output a backtrace on Linux systems with glibc.
-  int depth = backtrace(StackTrace, sizeof(StackTrace)/sizeof(StackTrace[0]));
-  
-  // Create a one-way unix pipe.  The backtracing process writes to PipeFDs[1],
-  // the c++filt process reads from PipeFDs[0].
-  int PipeFDs[2];
-  if (pipe(PipeFDs)) {
-    backtrace_symbols_fd(StackTrace, depth, STDERR_FILENO);
-    return;
-  }
-
-  switch (pid_t ChildPID = fork()) {
-  case -1:        // Error forking, print mangled stack trace
-    close(PipeFDs[0]);
-    close(PipeFDs[1]);
-    backtrace_symbols_fd(StackTrace, depth, STDERR_FILENO);
-    return;
-  default:        // backtracing process
-    close(PipeFDs[0]);  // Close the reader side.
-
-    // Print the mangled backtrace into the pipe.
-    backtrace_symbols_fd(StackTrace, depth, PipeFDs[1]);
-    close(PipeFDs[1]);   // We are done writing.
-    while (waitpid(ChildPID, 0, 0) == -1)
-      if (errno != EINTR) break;
-    return;
-
-  case 0:         // c++filt process
-    close(PipeFDs[1]);    // Close the writer side.
-    dup2(PipeFDs[0], 0);  // Read from standard input
-    close(PipeFDs[0]);    // Close the old descriptor
-    dup2(2, 1);           // Revector stdout -> stderr
-
-    // Try to run c++filt or gc++filt.  If neither is found, call back on 'cat'
-    // to print the mangled stack trace.  If we can't find cat, just exit.
-    execlp("c++filt", "c++filt", 0);
-    execlp("gc++filt", "gc++filt", 0);
-    execlp("cat", "cat", 0);
-    execlp("/bin/cat", "cat", 0);
-    exit(0);
-  }
-#endif
-}
-
-// SignalHandler - The signal handler that runs...
-static RETSIGTYPE SignalHandler(int Sig) {
-  while (!FilesToRemove.empty()) {
-    std::remove(FilesToRemove.back().c_str());
-    FilesToRemove.pop_back();
-  }
-
-  if (std::find(IntSigs, IntSigsEnd, Sig) != IntSigsEnd)
-    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...
-  PrintStackTrace();
-  signal(Sig, SIG_DFL);
-}
-
-static void RegisterHandler(int Signal) { signal(Signal, SignalHandler); }
-
-// RemoveFileOnSignal - The public API
-void llvm::RemoveFileOnSignal(const std::string &Filename) {
-  FilesToRemove.push_back(Filename);
-
-  std::for_each(IntSigs, IntSigsEnd, RegisterHandler);
-  std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
-}
-
-/// PrintStackTraceOnErrorSignal - When an error signal (such as SIBABRT or
-/// SIGSEGV) is delivered to the process, print a stack trace and then exit.
-void llvm::PrintStackTraceOnErrorSignal() {
-  std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
-}