Merge System into Support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120298 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Unix/Alarm.inc b/lib/Support/Unix/Alarm.inc
new file mode 100644
index 0000000..fb42b6c
--- /dev/null
+++ b/lib/Support/Unix/Alarm.inc
@@ -0,0 +1,72 @@
+//===-- Alarm.inc - Implement Unix Alarm Support ----------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the UNIX Alarm support.
+//
+//===----------------------------------------------------------------------===//
+
+#include <signal.h>
+#include <unistd.h>
+#include <cassert>
+using namespace llvm;
+
+/// AlarmCancelled - This flag is set by the SIGINT signal handler if the
+/// user presses CTRL-C.
+static volatile bool AlarmCancelled = false;
+
+/// AlarmTriggered - This flag is set by the SIGALRM signal handler if the
+/// alarm was triggered.
+static volatile bool AlarmTriggered = false;
+
+/// NestedSOI - Sanity check. Alarms cannot be nested or run in parallel.
+/// This ensures that they never do.
+static bool NestedSOI = false;
+
+static RETSIGTYPE SigIntHandler(int Sig) {
+ AlarmCancelled = true;
+ signal(SIGINT, SigIntHandler);
+}
+
+static RETSIGTYPE SigAlarmHandler(int Sig) {
+ AlarmTriggered = true;
+}
+
+static void (*OldSigIntHandler) (int);
+
+void sys::SetupAlarm(unsigned seconds) {
+ assert(!NestedSOI && "sys::SetupAlarm calls cannot be nested!");
+ NestedSOI = true;
+ AlarmCancelled = false;
+ AlarmTriggered = false;
+ ::signal(SIGALRM, SigAlarmHandler);
+ OldSigIntHandler = ::signal(SIGINT, SigIntHandler);
+ ::alarm(seconds);
+}
+
+void sys::TerminateAlarm() {
+ assert(NestedSOI && "sys::TerminateAlarm called without sys::SetupAlarm!");
+ ::alarm(0);
+ ::signal(SIGALRM, SIG_DFL);
+ ::signal(SIGINT, OldSigIntHandler);
+ AlarmCancelled = false;
+ AlarmTriggered = false;
+ NestedSOI = false;
+}
+
+int sys::AlarmStatus() {
+ if (AlarmCancelled)
+ return -1;
+ if (AlarmTriggered)
+ return 1;
+ return 0;
+}
+
+void sys::Sleep(unsigned n) {
+ ::sleep(n);
+}
diff --git a/lib/Support/Unix/Host.inc b/lib/Support/Unix/Host.inc
new file mode 100644
index 0000000..ca0de9c
--- /dev/null
+++ b/lib/Support/Unix/Host.inc
@@ -0,0 +1,96 @@
+ //===- llvm/System/Unix/Host.inc -------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the UNIX Host support.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//=== is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Config/config.h"
+#include "llvm/ADT/StringRef.h"
+#include "Unix.h"
+#include <sys/utsname.h>
+#include <string>
+
+using namespace llvm;
+
+static std::string getOSVersion() {
+ struct utsname info;
+
+ if (uname(&info))
+ return "";
+
+ return info.release;
+}
+
+std::string sys::getHostTriple() {
+ // FIXME: Derive directly instead of relying on the autoconf generated
+ // variable.
+
+ StringRef HostTripleString(LLVM_HOSTTRIPLE);
+ std::pair<StringRef, StringRef> ArchSplit = HostTripleString.split('-');
+
+ // Normalize the arch, since the host triple may not actually match the host.
+ std::string Arch = ArchSplit.first;
+
+ // It would be nice to do this in terms of llvm::Triple, but that is in
+ // Support which is layered above us.
+#if defined(__x86_64__)
+ Arch = "x86_64";
+#elif defined(__i386__)
+ Arch = "i386";
+#elif defined(__ppc64__)
+ Arch = "powerpc64";
+#elif defined(__ppc__)
+ Arch = "powerpc";
+#elif defined(__arm__)
+
+ // FIXME: We need to pick the right ARM triple (which involves querying the
+ // chip). However, for now this is most important for LLVM arch selection, so
+ // we only need to make sure to distinguish ARM and Thumb.
+# if defined(__thumb__)
+ Arch = "thumb";
+# else
+ Arch = "arm";
+# endif
+
+#else
+
+ // FIXME: When enough auto-detection is in place, this should just
+ // #error. Then at least the arch selection is done, and we only need the OS
+ // etc selection to kill off the use of LLVM_HOSTTRIPLE.
+
+#endif
+
+ std::string Triple(Arch);
+ Triple += '-';
+ Triple += ArchSplit.second;
+
+ // Force i<N>86 to i386.
+ if (Triple[0] == 'i' && isdigit(Triple[1]) &&
+ Triple[2] == '8' && Triple[3] == '6')
+ Triple[1] = '3';
+
+ // On darwin, we want to update the version to match that of the
+ // host.
+ std::string::size_type DarwinDashIdx = Triple.find("-darwin");
+ if (DarwinDashIdx != std::string::npos) {
+ Triple.resize(DarwinDashIdx + strlen("-darwin"));
+
+ // Only add the major part of the os version.
+ std::string Version = getOSVersion();
+ Triple += Version.substr(0, Version.find('.'));
+ }
+
+ return Triple;
+}
diff --git a/lib/Support/Unix/Memory.inc b/lib/Support/Unix/Memory.inc
new file mode 100644
index 0000000..4312d67
--- /dev/null
+++ b/lib/Support/Unix/Memory.inc
@@ -0,0 +1,151 @@
+//===- Unix/Memory.cpp - Generic UNIX System Configuration ------*- 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 functions for various memory management utilities.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Unix.h"
+#include "llvm/Support/DataTypes.h"
+#include "llvm/Support/Process.h"
+
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
+
+#ifdef __APPLE__
+#include <mach/mach.h>
+#endif
+
+/// AllocateRWX - Allocate a slab of memory with read/write/execute
+/// permissions. This is typically used for JIT applications where we want
+/// to emit code to the memory then jump to it. Getting this type of memory
+/// is very OS specific.
+///
+llvm::sys::MemoryBlock
+llvm::sys::Memory::AllocateRWX(size_t NumBytes, const MemoryBlock* NearBlock,
+ std::string *ErrMsg) {
+ if (NumBytes == 0) return MemoryBlock();
+
+ size_t pageSize = Process::GetPageSize();
+ size_t NumPages = (NumBytes+pageSize-1)/pageSize;
+
+ int fd = -1;
+#ifdef NEED_DEV_ZERO_FOR_MMAP
+ static int zero_fd = open("/dev/zero", O_RDWR);
+ if (zero_fd == -1) {
+ MakeErrMsg(ErrMsg, "Can't open /dev/zero device");
+ return MemoryBlock();
+ }
+ fd = zero_fd;
+#endif
+
+ int flags = MAP_PRIVATE |
+#ifdef HAVE_MMAP_ANONYMOUS
+ MAP_ANONYMOUS
+#else
+ MAP_ANON
+#endif
+ ;
+
+ void* start = NearBlock ? (unsigned char*)NearBlock->base() +
+ NearBlock->size() : 0;
+
+#if defined(__APPLE__) && defined(__arm__)
+ void *pa = ::mmap(start, pageSize*NumPages, PROT_READ|PROT_EXEC,
+ flags, fd, 0);
+#else
+ void *pa = ::mmap(start, pageSize*NumPages, PROT_READ|PROT_WRITE|PROT_EXEC,
+ flags, fd, 0);
+#endif
+ if (pa == MAP_FAILED) {
+ if (NearBlock) //Try again without a near hint
+ return AllocateRWX(NumBytes, 0);
+
+ MakeErrMsg(ErrMsg, "Can't allocate RWX Memory");
+ return MemoryBlock();
+ }
+
+#if defined(__APPLE__) && defined(__arm__)
+ kern_return_t kr = vm_protect(mach_task_self(), (vm_address_t)pa,
+ (vm_size_t)(pageSize*NumPages), 0,
+ VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_COPY);
+ if (KERN_SUCCESS != kr) {
+ MakeErrMsg(ErrMsg, "vm_protect max RX failed");
+ return sys::MemoryBlock();
+ }
+
+ kr = vm_protect(mach_task_self(), (vm_address_t)pa,
+ (vm_size_t)(pageSize*NumPages), 0,
+ VM_PROT_READ | VM_PROT_WRITE);
+ if (KERN_SUCCESS != kr) {
+ MakeErrMsg(ErrMsg, "vm_protect RW failed");
+ return sys::MemoryBlock();
+ }
+#endif
+
+ MemoryBlock result;
+ result.Address = pa;
+ result.Size = NumPages*pageSize;
+
+ return result;
+}
+
+bool llvm::sys::Memory::ReleaseRWX(MemoryBlock &M, std::string *ErrMsg) {
+ if (M.Address == 0 || M.Size == 0) return false;
+ if (0 != ::munmap(M.Address, M.Size))
+ return MakeErrMsg(ErrMsg, "Can't release RWX Memory");
+ return false;
+}
+
+bool llvm::sys::Memory::setWritable (MemoryBlock &M, std::string *ErrMsg) {
+#if defined(__APPLE__) && defined(__arm__)
+ if (M.Address == 0 || M.Size == 0) return false;
+ sys::Memory::InvalidateInstructionCache(M.Address, M.Size);
+ kern_return_t kr = vm_protect(mach_task_self(), (vm_address_t)M.Address,
+ (vm_size_t)M.Size, 0, VM_PROT_READ | VM_PROT_WRITE);
+ return KERN_SUCCESS == kr;
+#else
+ return true;
+#endif
+}
+
+bool llvm::sys::Memory::setExecutable (MemoryBlock &M, std::string *ErrMsg) {
+#if defined(__APPLE__) && defined(__arm__)
+ if (M.Address == 0 || M.Size == 0) return false;
+ sys::Memory::InvalidateInstructionCache(M.Address, M.Size);
+ kern_return_t kr = vm_protect(mach_task_self(), (vm_address_t)M.Address,
+ (vm_size_t)M.Size, 0, VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_COPY);
+ return KERN_SUCCESS == kr;
+#else
+ return false;
+#endif
+}
+
+bool llvm::sys::Memory::setRangeWritable(const void *Addr, size_t Size) {
+#if defined(__APPLE__) && defined(__arm__)
+ kern_return_t kr = vm_protect(mach_task_self(), (vm_address_t)Addr,
+ (vm_size_t)Size, 0,
+ VM_PROT_READ | VM_PROT_WRITE);
+ return KERN_SUCCESS == kr;
+#else
+ return true;
+#endif
+}
+
+bool llvm::sys::Memory::setRangeExecutable(const void *Addr, size_t Size) {
+#if defined(__APPLE__) && defined(__arm__)
+ kern_return_t kr = vm_protect(mach_task_self(), (vm_address_t)Addr,
+ (vm_size_t)Size, 0,
+ VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_COPY);
+ return KERN_SUCCESS == kr;
+#else
+ return true;
+#endif
+}
diff --git a/lib/Support/Unix/Mutex.inc b/lib/Support/Unix/Mutex.inc
new file mode 100644
index 0000000..5c50697
--- /dev/null
+++ b/lib/Support/Unix/Mutex.inc
@@ -0,0 +1,43 @@
+//===- llvm/System/Unix/Mutex.inc - Unix Mutex 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 implements the Unix specific (non-pthread) Mutex class.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//=== is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+namespace llvm
+{
+using namespace sys;
+
+MutexImpl::MutexImpl( bool recursive)
+{
+}
+
+MutexImpl::~MutexImpl()
+{
+}
+
+bool
+MutexImpl::release()
+{
+ return true;
+}
+
+bool
+MutexImpl::tryacquire( void )
+{
+ return true;
+}
+
+}
diff --git a/lib/Support/Unix/Path.inc b/lib/Support/Unix/Path.inc
new file mode 100644
index 0000000..5ee3adc
--- /dev/null
+++ b/lib/Support/Unix/Path.inc
@@ -0,0 +1,896 @@
+//===- llvm/System/Unix/Path.cpp - Unix Path 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 implements the Unix specific portion of the Path class.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//=== is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+#include "Unix.h"
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
+#ifdef HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_UTIME_H
+#include <utime.h>
+#endif
+#if HAVE_TIME_H
+#include <time.h>
+#endif
+#if HAVE_DIRENT_H
+# include <dirent.h>
+# define NAMLEN(dirent) strlen((dirent)->d_name)
+#else
+# define dirent direct
+# define NAMLEN(dirent) (dirent)->d_namlen
+# if HAVE_SYS_NDIR_H
+# include <sys/ndir.h>
+# endif
+# if HAVE_SYS_DIR_H
+# include <sys/dir.h>
+# endif
+# if HAVE_NDIR_H
+# include <ndir.h>
+# endif
+#endif
+
+#if HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
+#ifdef __APPLE__
+#include <mach-o/dyld.h>
+#endif
+
+// Put in a hack for Cygwin which falsely reports that the mkdtemp function
+// is available when it is not.
+#ifdef __CYGWIN__
+# undef HAVE_MKDTEMP
+#endif
+
+namespace {
+inline bool lastIsSlash(const std::string& path) {
+ return !path.empty() && path[path.length() - 1] == '/';
+}
+
+}
+
+namespace llvm {
+using namespace sys;
+
+const char sys::PathSeparator = ':';
+
+StringRef Path::GetEXESuffix() {
+ return StringRef();
+}
+
+Path::Path(StringRef p)
+ : path(p) {}
+
+Path::Path(const char *StrStart, unsigned StrLen)
+ : path(StrStart, StrLen) {}
+
+Path&
+Path::operator=(StringRef that) {
+ path.assign(that.data(), that.size());
+ return *this;
+}
+
+bool
+Path::isValid() const {
+ // Empty paths are considered invalid here.
+ // This code doesn't check MAXPATHLEN because there's no need. Nothing in
+ // LLVM manipulates Paths with fixed-sizes arrays, and if the OS can't
+ // handle names longer than some limit, it'll report this on demand using
+ // ENAMETOLONG.
+ return !path.empty();
+}
+
+bool
+Path::isAbsolute(const char *NameStart, unsigned NameLen) {
+ assert(NameStart);
+ if (NameLen == 0)
+ return false;
+ return NameStart[0] == '/';
+}
+
+bool
+Path::isAbsolute() const {
+ if (path.empty())
+ return false;
+ return path[0] == '/';
+}
+
+void Path::makeAbsolute() {
+ if (isAbsolute())
+ return;
+
+ Path CWD = Path::GetCurrentDirectory();
+ assert(CWD.isAbsolute() && "GetCurrentDirectory returned relative path!");
+
+ CWD.appendComponent(path);
+
+ path = CWD.str();
+}
+
+Path
+Path::GetRootDirectory() {
+ Path result;
+ result.set("/");
+ return result;
+}
+
+Path
+Path::GetTemporaryDirectory(std::string *ErrMsg) {
+#if defined(HAVE_MKDTEMP)
+ // The best way is with mkdtemp but that's not available on many systems,
+ // Linux and FreeBSD have it. Others probably won't.
+ char pathname[] = "/tmp/llvm_XXXXXX";
+ if (0 == mkdtemp(pathname)) {
+ MakeErrMsg(ErrMsg,
+ std::string(pathname) + ": can't create temporary directory");
+ return Path();
+ }
+ return Path(pathname);
+#elif defined(HAVE_MKSTEMP)
+ // If no mkdtemp is available, mkstemp can be used to create a temporary file
+ // which is then removed and created as a directory. We prefer this over
+ // mktemp because of mktemp's inherent security and threading risks. We still
+ // have a slight race condition from the time the temporary file is created to
+ // the time it is re-created as a directoy.
+ char pathname[] = "/tmp/llvm_XXXXXX";
+ int fd = 0;
+ if (-1 == (fd = mkstemp(pathname))) {
+ MakeErrMsg(ErrMsg,
+ std::string(pathname) + ": can't create temporary directory");
+ return Path();
+ }
+ ::close(fd);
+ ::unlink(pathname); // start race condition, ignore errors
+ if (-1 == ::mkdir(pathname, S_IRWXU)) { // end race condition
+ MakeErrMsg(ErrMsg,
+ std::string(pathname) + ": can't create temporary directory");
+ return Path();
+ }
+ return Path(pathname);
+#elif defined(HAVE_MKTEMP)
+ // If a system doesn't have mkdtemp(3) or mkstemp(3) but it does have
+ // mktemp(3) then we'll assume that system (e.g. AIX) has a reasonable
+ // implementation of mktemp(3) and doesn't follow BSD 4.3's lead of replacing
+ // the XXXXXX with the pid of the process and a letter. That leads to only
+ // twenty six temporary files that can be generated.
+ char pathname[] = "/tmp/llvm_XXXXXX";
+ char *TmpName = ::mktemp(pathname);
+ if (TmpName == 0) {
+ MakeErrMsg(ErrMsg,
+ std::string(TmpName) + ": can't create unique directory name");
+ return Path();
+ }
+ if (-1 == ::mkdir(TmpName, S_IRWXU)) {
+ MakeErrMsg(ErrMsg,
+ std::string(TmpName) + ": can't create temporary directory");
+ return Path();
+ }
+ return Path(TmpName);
+#else
+ // This is the worst case implementation. tempnam(3) leaks memory unless its
+ // on an SVID2 (or later) system. On BSD 4.3 it leaks. tmpnam(3) has thread
+ // issues. The mktemp(3) function doesn't have enough variability in the
+ // temporary name generated. So, we provide our own implementation that
+ // increments an integer from a random number seeded by the current time. This
+ // should be sufficiently unique that we don't have many collisions between
+ // processes. Generally LLVM processes don't run very long and don't use very
+ // many temporary files so this shouldn't be a big issue for LLVM.
+ static time_t num = ::time(0);
+ char pathname[MAXPATHLEN];
+ do {
+ num++;
+ sprintf(pathname, "/tmp/llvm_%010u", unsigned(num));
+ } while ( 0 == access(pathname, F_OK ) );
+ if (-1 == ::mkdir(pathname, S_IRWXU)) {
+ MakeErrMsg(ErrMsg,
+ std::string(pathname) + ": can't create temporary directory");
+ return Path();
+ }
+ return Path(pathname);
+#endif
+}
+
+void
+Path::GetSystemLibraryPaths(std::vector<sys::Path>& Paths) {
+#ifdef LTDL_SHLIBPATH_VAR
+ char* env_var = getenv(LTDL_SHLIBPATH_VAR);
+ if (env_var != 0) {
+ getPathList(env_var,Paths);
+ }
+#endif
+ // FIXME: Should this look at LD_LIBRARY_PATH too?
+ Paths.push_back(sys::Path("/usr/local/lib/"));
+ Paths.push_back(sys::Path("/usr/X11R6/lib/"));
+ Paths.push_back(sys::Path("/usr/lib/"));
+ Paths.push_back(sys::Path("/lib/"));
+}
+
+void
+Path::GetBitcodeLibraryPaths(std::vector<sys::Path>& Paths) {
+ char * env_var = getenv("LLVM_LIB_SEARCH_PATH");
+ if (env_var != 0) {
+ getPathList(env_var,Paths);
+ }
+#ifdef LLVM_LIBDIR
+ {
+ Path tmpPath;
+ if (tmpPath.set(LLVM_LIBDIR))
+ if (tmpPath.canRead())
+ Paths.push_back(tmpPath);
+ }
+#endif
+ GetSystemLibraryPaths(Paths);
+}
+
+Path
+Path::GetLLVMDefaultConfigDir() {
+ return Path("/etc/llvm/");
+}
+
+Path
+Path::GetUserHomeDirectory() {
+ const char* home = getenv("HOME");
+ if (home) {
+ Path result;
+ if (result.set(home))
+ return result;
+ }
+ return GetRootDirectory();
+}
+
+Path
+Path::GetCurrentDirectory() {
+ char pathname[MAXPATHLEN];
+ if (!getcwd(pathname,MAXPATHLEN)) {
+ assert (false && "Could not query current working directory.");
+ return Path();
+ }
+
+ return Path(pathname);
+}
+
+#if defined(__FreeBSD__) || defined (__NetBSD__) || defined(__minix)
+static int
+test_dir(char buf[PATH_MAX], char ret[PATH_MAX],
+ const char *dir, const char *bin)
+{
+ struct stat sb;
+
+ snprintf(buf, PATH_MAX, "%s/%s", dir, bin);
+ if (realpath(buf, ret) == NULL)
+ return (1);
+ if (stat(buf, &sb) != 0)
+ return (1);
+
+ return (0);
+}
+
+static char *
+getprogpath(char ret[PATH_MAX], const char *bin)
+{
+ char *pv, *s, *t, buf[PATH_MAX];
+
+ /* First approach: absolute path. */
+ if (bin[0] == '/') {
+ if (test_dir(buf, ret, "/", bin) == 0)
+ return (ret);
+ return (NULL);
+ }
+
+ /* Second approach: relative path. */
+ if (strchr(bin, '/') != NULL) {
+ if (getcwd(buf, PATH_MAX) == NULL)
+ return (NULL);
+ if (test_dir(buf, ret, buf, bin) == 0)
+ return (ret);
+ return (NULL);
+ }
+
+ /* Third approach: $PATH */
+ if ((pv = getenv("PATH")) == NULL)
+ return (NULL);
+ s = pv = strdup(pv);
+ if (pv == NULL)
+ return (NULL);
+ while ((t = strsep(&s, ":")) != NULL) {
+ if (test_dir(buf, ret, t, bin) == 0) {
+ free(pv);
+ return (ret);
+ }
+ }
+ free(pv);
+ return (NULL);
+}
+#endif // __FreeBSD__ || __NetBSD__
+
+/// GetMainExecutable - Return the path to the main executable, given the
+/// value of argv[0] from program startup.
+Path Path::GetMainExecutable(const char *argv0, void *MainAddr) {
+#if defined(__APPLE__)
+ // On OS X the executable path is saved to the stack by dyld. Reading it
+ // from there is much faster than calling dladdr, especially for large
+ // binaries with symbols.
+ char exe_path[MAXPATHLEN];
+ uint32_t size = sizeof(exe_path);
+ if (_NSGetExecutablePath(exe_path, &size) == 0) {
+ char link_path[MAXPATHLEN];
+ if (realpath(exe_path, link_path))
+ return Path(link_path);
+ }
+#elif defined(__FreeBSD__) || defined (__NetBSD__) || defined(__minix)
+ char exe_path[PATH_MAX];
+
+ if (getprogpath(exe_path, argv0) != NULL)
+ return Path(exe_path);
+#elif defined(__linux__) || defined(__CYGWIN__)
+ char exe_path[MAXPATHLEN];
+ ssize_t len = readlink("/proc/self/exe", exe_path, sizeof(exe_path));
+ if (len >= 0)
+ return Path(StringRef(exe_path, len));
+#elif defined(HAVE_DLFCN_H)
+ // Use dladdr to get executable path if available.
+ Dl_info DLInfo;
+ int err = dladdr(MainAddr, &DLInfo);
+ if (err == 0)
+ return Path();
+
+ // If the filename is a symlink, we need to resolve and return the location of
+ // the actual executable.
+ char link_path[MAXPATHLEN];
+ if (realpath(DLInfo.dli_fname, link_path))
+ return Path(link_path);
+#else
+#error GetMainExecutable is not implemented on this host yet.
+#endif
+ return Path();
+}
+
+
+StringRef Path::getDirname() const {
+ return getDirnameCharSep(path, "/");
+}
+
+StringRef
+Path::getBasename() const {
+ // Find the last slash
+ std::string::size_type slash = path.rfind('/');
+ if (slash == std::string::npos)
+ slash = 0;
+ else
+ slash++;
+
+ std::string::size_type dot = path.rfind('.');
+ if (dot == std::string::npos || dot < slash)
+ return StringRef(path).substr(slash);
+ else
+ return StringRef(path).substr(slash, dot - slash);
+}
+
+StringRef
+Path::getSuffix() const {
+ // Find the last slash
+ std::string::size_type slash = path.rfind('/');
+ if (slash == std::string::npos)
+ slash = 0;
+ else
+ slash++;
+
+ std::string::size_type dot = path.rfind('.');
+ if (dot == std::string::npos || dot < slash)
+ return StringRef();
+ else
+ return StringRef(path).substr(dot + 1);
+}
+
+bool Path::getMagicNumber(std::string &Magic, unsigned len) const {
+ assert(len < 1024 && "Request for magic string too long");
+ char Buf[1025];
+ int fd = ::open(path.c_str(), O_RDONLY);
+ if (fd < 0)
+ return false;
+ ssize_t bytes_read = ::read(fd, Buf, len);
+ ::close(fd);
+ if (ssize_t(len) != bytes_read)
+ return false;
+ Magic.assign(Buf, len);
+ return true;
+}
+
+bool
+Path::exists() const {
+ return 0 == access(path.c_str(), F_OK );
+}
+
+bool
+Path::isDirectory() const {
+ struct stat buf;
+ if (0 != stat(path.c_str(), &buf))
+ return false;
+ return ((buf.st_mode & S_IFMT) == S_IFDIR) ? true : false;
+}
+
+bool
+Path::isSymLink() const {
+ struct stat buf;
+ if (0 != lstat(path.c_str(), &buf))
+ return false;
+ return S_ISLNK(buf.st_mode);
+}
+
+
+bool
+Path::canRead() const {
+ return 0 == access(path.c_str(), R_OK);
+}
+
+bool
+Path::canWrite() const {
+ return 0 == access(path.c_str(), W_OK);
+}
+
+bool
+Path::isRegularFile() const {
+ // Get the status so we can determine if it's a file or directory
+ struct stat buf;
+
+ if (0 != stat(path.c_str(), &buf))
+ return false;
+
+ if (S_ISREG(buf.st_mode))
+ return true;
+
+ return false;
+}
+
+bool
+Path::canExecute() const {
+ if (0 != access(path.c_str(), R_OK | X_OK ))
+ return false;
+ struct stat buf;
+ if (0 != stat(path.c_str(), &buf))
+ return false;
+ if (!S_ISREG(buf.st_mode))
+ return false;
+ return true;
+}
+
+StringRef
+Path::getLast() const {
+ // Find the last slash
+ size_t pos = path.rfind('/');
+
+ // Handle the corner cases
+ if (pos == std::string::npos)
+ return path;
+
+ // If the last character is a slash
+ if (pos == path.length()-1) {
+ // Find the second to last slash
+ size_t pos2 = path.rfind('/', pos-1);
+ if (pos2 == std::string::npos)
+ return StringRef(path).substr(0,pos);
+ else
+ return StringRef(path).substr(pos2+1,pos-pos2-1);
+ }
+ // Return everything after the last slash
+ return StringRef(path).substr(pos+1);
+}
+
+const FileStatus *
+PathWithStatus::getFileStatus(bool update, std::string *ErrStr) const {
+ if (!fsIsValid || update) {
+ struct stat buf;
+ if (0 != stat(path.c_str(), &buf)) {
+ MakeErrMsg(ErrStr, path + ": can't get status of file");
+ return 0;
+ }
+ status.fileSize = buf.st_size;
+ status.modTime.fromEpochTime(buf.st_mtime);
+ status.mode = buf.st_mode;
+ status.user = buf.st_uid;
+ status.group = buf.st_gid;
+ status.uniqueID = uint64_t(buf.st_ino);
+ status.isDir = S_ISDIR(buf.st_mode);
+ status.isFile = S_ISREG(buf.st_mode);
+ fsIsValid = true;
+ }
+ return &status;
+}
+
+static bool AddPermissionBits(const Path &File, int bits) {
+ // Get the umask value from the operating system. We want to use it
+ // when changing the file's permissions. Since calling umask() sets
+ // the umask and returns its old value, we must call it a second
+ // time to reset it to the user's preference.
+ int mask = umask(0777); // The arg. to umask is arbitrary.
+ umask(mask); // Restore the umask.
+
+ // Get the file's current mode.
+ struct stat buf;
+ if (0 != stat(File.c_str(), &buf))
+ return false;
+ // Change the file to have whichever permissions bits from 'bits'
+ // that the umask would not disable.
+ if ((chmod(File.c_str(), (buf.st_mode | (bits & ~mask)))) == -1)
+ return false;
+ return true;
+}
+
+bool Path::makeReadableOnDisk(std::string* ErrMsg) {
+ if (!AddPermissionBits(*this, 0444))
+ return MakeErrMsg(ErrMsg, path + ": can't make file readable");
+ return false;
+}
+
+bool Path::makeWriteableOnDisk(std::string* ErrMsg) {
+ if (!AddPermissionBits(*this, 0222))
+ return MakeErrMsg(ErrMsg, path + ": can't make file writable");
+ return false;
+}
+
+bool Path::makeExecutableOnDisk(std::string* ErrMsg) {
+ if (!AddPermissionBits(*this, 0111))
+ return MakeErrMsg(ErrMsg, path + ": can't make file executable");
+ return false;
+}
+
+bool
+Path::getDirectoryContents(std::set<Path>& result, std::string* ErrMsg) const {
+ DIR* direntries = ::opendir(path.c_str());
+ if (direntries == 0)
+ return MakeErrMsg(ErrMsg, path + ": can't open directory");
+
+ std::string dirPath = path;
+ if (!lastIsSlash(dirPath))
+ dirPath += '/';
+
+ result.clear();
+ struct dirent* de = ::readdir(direntries);
+ for ( ; de != 0; de = ::readdir(direntries)) {
+ if (de->d_name[0] != '.') {
+ Path aPath(dirPath + (const char*)de->d_name);
+ struct stat st;
+ if (0 != lstat(aPath.path.c_str(), &st)) {
+ if (S_ISLNK(st.st_mode))
+ continue; // dangling symlink -- ignore
+ return MakeErrMsg(ErrMsg,
+ aPath.path + ": can't determine file object type");
+ }
+ result.insert(aPath);
+ }
+ }
+
+ closedir(direntries);
+ return false;
+}
+
+bool
+Path::set(StringRef a_path) {
+ if (a_path.empty())
+ return false;
+ path = a_path;
+ return true;
+}
+
+bool
+Path::appendComponent(StringRef name) {
+ if (name.empty())
+ return false;
+ if (!lastIsSlash(path))
+ path += '/';
+ path += name;
+ return true;
+}
+
+bool
+Path::eraseComponent() {
+ size_t slashpos = path.rfind('/',path.size());
+ if (slashpos == 0 || slashpos == std::string::npos) {
+ path.erase();
+ return true;
+ }
+ if (slashpos == path.size() - 1)
+ slashpos = path.rfind('/',slashpos-1);
+ if (slashpos == std::string::npos) {
+ path.erase();
+ return true;
+ }
+ path.erase(slashpos);
+ return true;
+}
+
+bool
+Path::eraseSuffix() {
+ size_t dotpos = path.rfind('.',path.size());
+ size_t slashpos = path.rfind('/',path.size());
+ if (dotpos != std::string::npos) {
+ if (slashpos == std::string::npos || dotpos > slashpos+1) {
+ path.erase(dotpos, path.size()-dotpos);
+ return true;
+ }
+ }
+ return false;
+}
+
+static bool createDirectoryHelper(char* beg, char* end, bool create_parents) {
+
+ if (access(beg, R_OK | W_OK) == 0)
+ return false;
+
+ if (create_parents) {
+
+ char* c = end;
+
+ for (; c != beg; --c)
+ if (*c == '/') {
+
+ // Recurse to handling the parent directory.
+ *c = '\0';
+ bool x = createDirectoryHelper(beg, c, create_parents);
+ *c = '/';
+
+ // Return if we encountered an error.
+ if (x)
+ return true;
+
+ break;
+ }
+ }
+
+ return mkdir(beg, S_IRWXU | S_IRWXG) != 0;
+}
+
+bool
+Path::createDirectoryOnDisk( bool create_parents, std::string* ErrMsg ) {
+ // Get a writeable copy of the path name
+ std::string pathname(path);
+
+ // Null-terminate the last component
+ size_t lastchar = path.length() - 1 ;
+
+ if (pathname[lastchar] != '/')
+ ++lastchar;
+
+ pathname[lastchar] = '\0';
+
+ if (createDirectoryHelper(&pathname[0], &pathname[lastchar], create_parents))
+ return MakeErrMsg(ErrMsg, pathname + ": can't create directory");
+
+ return false;
+}
+
+bool
+Path::createFileOnDisk(std::string* ErrMsg) {
+ // Create the file
+ int fd = ::creat(path.c_str(), S_IRUSR | S_IWUSR);
+ if (fd < 0)
+ return MakeErrMsg(ErrMsg, path + ": can't create file");
+ ::close(fd);
+ return false;
+}
+
+bool
+Path::createTemporaryFileOnDisk(bool reuse_current, std::string* ErrMsg) {
+ // Make this into a unique file name
+ if (makeUnique( reuse_current, ErrMsg ))
+ return true;
+
+ // create the file
+ int fd = ::open(path.c_str(), O_WRONLY|O_CREAT|O_TRUNC, 0666);
+ if (fd < 0)
+ return MakeErrMsg(ErrMsg, path + ": can't create temporary file");
+ ::close(fd);
+ return false;
+}
+
+bool
+Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const {
+ // Get the status so we can determine if it's a file or directory.
+ struct stat buf;
+ if (0 != stat(path.c_str(), &buf)) {
+ MakeErrMsg(ErrStr, path + ": can't get status of file");
+ return true;
+ }
+
+ // Note: this check catches strange situations. In all cases, LLVM should
+ // only be involved in the creation and deletion of regular files. This
+ // check ensures that what we're trying to erase is a regular file. It
+ // effectively prevents LLVM from erasing things like /dev/null, any block
+ // special file, or other things that aren't "regular" files.
+ if (S_ISREG(buf.st_mode)) {
+ if (unlink(path.c_str()) != 0)
+ return MakeErrMsg(ErrStr, path + ": can't destroy file");
+ return false;
+ }
+
+ if (!S_ISDIR(buf.st_mode)) {
+ if (ErrStr) *ErrStr = "not a file or directory";
+ return true;
+ }
+
+ if (remove_contents) {
+ // Recursively descend the directory to remove its contents.
+ std::string cmd = "/bin/rm -rf " + path;
+ if (system(cmd.c_str()) != 0) {
+ MakeErrMsg(ErrStr, path + ": failed to recursively remove directory.");
+ return true;
+ }
+ return false;
+ }
+
+ // Otherwise, try to just remove the one directory.
+ std::string pathname(path);
+ size_t lastchar = path.length() - 1;
+ if (pathname[lastchar] == '/')
+ pathname[lastchar] = '\0';
+ else
+ pathname[lastchar+1] = '\0';
+
+ if (rmdir(pathname.c_str()) != 0)
+ return MakeErrMsg(ErrStr, pathname + ": can't erase directory");
+ return false;
+}
+
+bool
+Path::renamePathOnDisk(const Path& newName, std::string* ErrMsg) {
+ if (0 != ::rename(path.c_str(), newName.c_str()))
+ return MakeErrMsg(ErrMsg, std::string("can't rename '") + path + "' as '" +
+ newName.str() + "'");
+ return false;
+}
+
+bool
+Path::setStatusInfoOnDisk(const FileStatus &si, std::string *ErrStr) const {
+ struct utimbuf utb;
+ utb.actime = si.modTime.toPosixTime();
+ utb.modtime = utb.actime;
+ if (0 != ::utime(path.c_str(),&utb))
+ return MakeErrMsg(ErrStr, path + ": can't set file modification time");
+ if (0 != ::chmod(path.c_str(),si.mode))
+ return MakeErrMsg(ErrStr, path + ": can't set mode");
+ return false;
+}
+
+bool
+sys::CopyFile(const sys::Path &Dest, const sys::Path &Src, std::string* ErrMsg){
+ int inFile = -1;
+ int outFile = -1;
+ inFile = ::open(Src.c_str(), O_RDONLY);
+ if (inFile == -1)
+ return MakeErrMsg(ErrMsg, Src.str() +
+ ": can't open source file to copy");
+
+ outFile = ::open(Dest.c_str(), O_WRONLY|O_CREAT, 0666);
+ if (outFile == -1) {
+ ::close(inFile);
+ return MakeErrMsg(ErrMsg, Dest.str() +
+ ": can't create destination file for copy");
+ }
+
+ char Buffer[16*1024];
+ while (ssize_t Amt = ::read(inFile, Buffer, 16*1024)) {
+ if (Amt == -1) {
+ if (errno != EINTR && errno != EAGAIN) {
+ ::close(inFile);
+ ::close(outFile);
+ return MakeErrMsg(ErrMsg, Src.str()+": can't read source file");
+ }
+ } else {
+ char *BufPtr = Buffer;
+ while (Amt) {
+ ssize_t AmtWritten = ::write(outFile, BufPtr, Amt);
+ if (AmtWritten == -1) {
+ if (errno != EINTR && errno != EAGAIN) {
+ ::close(inFile);
+ ::close(outFile);
+ return MakeErrMsg(ErrMsg, Dest.str() +
+ ": can't write destination file");
+ }
+ } else {
+ Amt -= AmtWritten;
+ BufPtr += AmtWritten;
+ }
+ }
+ }
+ }
+ ::close(inFile);
+ ::close(outFile);
+ return false;
+}
+
+bool
+Path::makeUnique(bool reuse_current, std::string* ErrMsg) {
+ if (reuse_current && !exists())
+ return false; // File doesn't exist already, just use it!
+
+ // Append an XXXXXX pattern to the end of the file for use with mkstemp,
+ // mktemp or our own implementation.
+ // This uses std::vector instead of SmallVector to avoid a dependence on
+ // libSupport. And performance isn't critical here.
+ std::vector<char> Buf;
+ Buf.resize(path.size()+8);
+ char *FNBuffer = &Buf[0];
+ path.copy(FNBuffer,path.size());
+ if (isDirectory())
+ strcpy(FNBuffer+path.size(), "/XXXXXX");
+ else
+ strcpy(FNBuffer+path.size(), "-XXXXXX");
+
+#if defined(HAVE_MKSTEMP)
+ int TempFD;
+ if ((TempFD = mkstemp(FNBuffer)) == -1)
+ return MakeErrMsg(ErrMsg, path + ": can't make unique filename");
+
+ // We don't need to hold the temp file descriptor... we will trust that no one
+ // will overwrite/delete the file before we can open it again.
+ close(TempFD);
+
+ // Save the name
+ path = FNBuffer;
+#elif defined(HAVE_MKTEMP)
+ // If we don't have mkstemp, use the old and obsolete mktemp function.
+ if (mktemp(FNBuffer) == 0)
+ return MakeErrMsg(ErrMsg, path + ": can't make unique filename");
+
+ // Save the name
+ path = FNBuffer;
+#else
+ // Okay, looks like we have to do it all by our lonesome.
+ static unsigned FCounter = 0;
+ // Try to initialize with unique value.
+ if (FCounter == 0) FCounter = ((unsigned)getpid() & 0xFFFF) << 8;
+ char* pos = strstr(FNBuffer, "XXXXXX");
+ do {
+ if (++FCounter > 0xFFFFFF) {
+ return MakeErrMsg(ErrMsg,
+ path + ": can't make unique filename: too many files");
+ }
+ sprintf(pos, "%06X", FCounter);
+ path = FNBuffer;
+ } while (exists());
+ // POSSIBLE SECURITY BUG: An attacker can easily guess the name and exploit
+ // LLVM.
+#endif
+ return false;
+}
+
+const char *Path::MapInFilePages(int FD, uint64_t FileSize) {
+ int Flags = MAP_PRIVATE;
+#ifdef MAP_FILE
+ Flags |= MAP_FILE;
+#endif
+ void *BasePtr = ::mmap(0, FileSize, PROT_READ, Flags, FD, 0);
+ if (BasePtr == MAP_FAILED)
+ return 0;
+ return (const char*)BasePtr;
+}
+
+void Path::UnMapFilePages(const char *BasePtr, uint64_t FileSize) {
+ ::munmap((void*)BasePtr, FileSize);
+}
+
+} // end llvm namespace
diff --git a/lib/Support/Unix/Process.inc b/lib/Support/Unix/Process.inc
new file mode 100644
index 0000000..5cdb11c
--- /dev/null
+++ b/lib/Support/Unix/Process.inc
@@ -0,0 +1,295 @@
+//===- Unix/Process.cpp - Unix Process 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 provides the generic Unix implementation of the Process class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Unix.h"
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+// DragonFly BSD has deprecated <malloc.h> for <stdlib.h> instead,
+// Unix.h includes this for us already.
+#if defined(HAVE_MALLOC_H) && !defined(__DragonFly__)
+#include <malloc.h>
+#endif
+#ifdef HAVE_MALLOC_MALLOC_H
+#include <malloc/malloc.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+# include <sys/ioctl.h>
+#endif
+#ifdef HAVE_TERMIOS_H
+# include <termios.h>
+#endif
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//=== is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+using namespace llvm;
+using namespace sys;
+
+unsigned
+Process::GetPageSize()
+{
+#if defined(__CYGWIN__)
+ // On Cygwin, getpagesize() returns 64k but the page size for the purposes of
+ // memory protection and mmap() is 4k.
+ // See http://www.cygwin.com/ml/cygwin/2009-01/threads.html#00492
+ const int page_size = 0x1000;
+#elif defined(HAVE_GETPAGESIZE)
+ const int page_size = ::getpagesize();
+#elif defined(HAVE_SYSCONF)
+ long page_size = ::sysconf(_SC_PAGE_SIZE);
+#else
+#warning Cannot get the page size on this machine
+#endif
+ return static_cast<unsigned>(page_size);
+}
+
+size_t Process::GetMallocUsage() {
+#if defined(HAVE_MALLINFO)
+ struct mallinfo mi;
+ mi = ::mallinfo();
+ return mi.uordblks;
+#elif defined(HAVE_MALLOC_ZONE_STATISTICS) && defined(HAVE_MALLOC_MALLOC_H)
+ malloc_statistics_t Stats;
+ malloc_zone_statistics(malloc_default_zone(), &Stats);
+ return Stats.size_in_use; // darwin
+#elif defined(HAVE_SBRK)
+ // Note this is only an approximation and more closely resembles
+ // the value returned by mallinfo in the arena field.
+ static char *StartOfMemory = reinterpret_cast<char*>(::sbrk(0));
+ char *EndOfMemory = (char*)sbrk(0);
+ if (EndOfMemory != ((char*)-1) && StartOfMemory != ((char*)-1))
+ return EndOfMemory - StartOfMemory;
+ else
+ return 0;
+#else
+#warning Cannot get malloc info on this platform
+ return 0;
+#endif
+}
+
+size_t
+Process::GetTotalMemoryUsage()
+{
+#if defined(HAVE_MALLINFO)
+ struct mallinfo mi = ::mallinfo();
+ return mi.uordblks + mi.hblkhd;
+#elif defined(HAVE_MALLOC_ZONE_STATISTICS) && defined(HAVE_MALLOC_MALLOC_H)
+ malloc_statistics_t Stats;
+ malloc_zone_statistics(malloc_default_zone(), &Stats);
+ return Stats.size_allocated; // darwin
+#elif defined(HAVE_GETRUSAGE) && !defined(__HAIKU__)
+ struct rusage usage;
+ ::getrusage(RUSAGE_SELF, &usage);
+ return usage.ru_maxrss;
+#else
+#warning Cannot get total memory size on this platform
+ return 0;
+#endif
+}
+
+void
+Process::GetTimeUsage(TimeValue& elapsed, TimeValue& user_time,
+ TimeValue& sys_time)
+{
+ elapsed = TimeValue::now();
+#if defined(HAVE_GETRUSAGE)
+ struct rusage usage;
+ ::getrusage(RUSAGE_SELF, &usage);
+ user_time = TimeValue(
+ static_cast<TimeValue::SecondsType>( usage.ru_utime.tv_sec ),
+ static_cast<TimeValue::NanoSecondsType>( usage.ru_utime.tv_usec *
+ TimeValue::NANOSECONDS_PER_MICROSECOND ) );
+ sys_time = TimeValue(
+ static_cast<TimeValue::SecondsType>( usage.ru_stime.tv_sec ),
+ static_cast<TimeValue::NanoSecondsType>( usage.ru_stime.tv_usec *
+ TimeValue::NANOSECONDS_PER_MICROSECOND ) );
+#else
+#warning Cannot get usage times on this platform
+ user_time.seconds(0);
+ user_time.microseconds(0);
+ sys_time.seconds(0);
+ sys_time.microseconds(0);
+#endif
+}
+
+int Process::GetCurrentUserId() {
+ return getuid();
+}
+
+int Process::GetCurrentGroupId() {
+ return getgid();
+}
+
+#ifdef HAVE_MACH_MACH_H
+#include <mach/mach.h>
+#endif
+
+// Some LLVM programs such as bugpoint produce core files as a normal part of
+// their operation. To prevent the disk from filling up, this function
+// does what's necessary to prevent their generation.
+void Process::PreventCoreFiles() {
+#if HAVE_SETRLIMIT
+ struct rlimit rlim;
+ rlim.rlim_cur = rlim.rlim_max = 0;
+ setrlimit(RLIMIT_CORE, &rlim);
+#endif
+
+#ifdef HAVE_MACH_MACH_H
+ // Disable crash reporting on Mac OS X 10.0-10.4
+
+ // get information about the original set of exception ports for the task
+ mach_msg_type_number_t Count = 0;
+ exception_mask_t OriginalMasks[EXC_TYPES_COUNT];
+ exception_port_t OriginalPorts[EXC_TYPES_COUNT];
+ exception_behavior_t OriginalBehaviors[EXC_TYPES_COUNT];
+ thread_state_flavor_t OriginalFlavors[EXC_TYPES_COUNT];
+ kern_return_t err =
+ task_get_exception_ports(mach_task_self(), EXC_MASK_ALL, OriginalMasks,
+ &Count, OriginalPorts, OriginalBehaviors,
+ OriginalFlavors);
+ if (err == KERN_SUCCESS) {
+ // replace each with MACH_PORT_NULL.
+ for (unsigned i = 0; i != Count; ++i)
+ task_set_exception_ports(mach_task_self(), OriginalMasks[i],
+ MACH_PORT_NULL, OriginalBehaviors[i],
+ OriginalFlavors[i]);
+ }
+
+ // Disable crash reporting on Mac OS X 10.5
+ signal(SIGABRT, _exit);
+ signal(SIGILL, _exit);
+ signal(SIGFPE, _exit);
+ signal(SIGSEGV, _exit);
+ signal(SIGBUS, _exit);
+#endif
+}
+
+bool Process::StandardInIsUserInput() {
+ return FileDescriptorIsDisplayed(STDIN_FILENO);
+}
+
+bool Process::StandardOutIsDisplayed() {
+ return FileDescriptorIsDisplayed(STDOUT_FILENO);
+}
+
+bool Process::StandardErrIsDisplayed() {
+ return FileDescriptorIsDisplayed(STDERR_FILENO);
+}
+
+bool Process::FileDescriptorIsDisplayed(int fd) {
+#if HAVE_ISATTY
+ return isatty(fd);
+#else
+ // If we don't have isatty, just return false.
+ return false;
+#endif
+}
+
+static unsigned getColumns(int FileID) {
+ // If COLUMNS is defined in the environment, wrap to that many columns.
+ if (const char *ColumnsStr = std::getenv("COLUMNS")) {
+ int Columns = std::atoi(ColumnsStr);
+ if (Columns > 0)
+ return Columns;
+ }
+
+ unsigned Columns = 0;
+
+#if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_TERMIOS_H)
+ // Try to determine the width of the terminal.
+ struct winsize ws;
+ if (ioctl(FileID, TIOCGWINSZ, &ws) == 0)
+ Columns = ws.ws_col;
+#endif
+
+ return Columns;
+}
+
+unsigned Process::StandardOutColumns() {
+ if (!StandardOutIsDisplayed())
+ return 0;
+
+ return getColumns(1);
+}
+
+unsigned Process::StandardErrColumns() {
+ if (!StandardErrIsDisplayed())
+ return 0;
+
+ return getColumns(2);
+}
+
+static bool terminalHasColors() {
+ if (const char *term = std::getenv("TERM")) {
+ // Most modern terminals support ANSI escape sequences for colors.
+ // We could check terminfo, or have a list of known terms that support
+ // colors, but that would be overkill.
+ // The user can always ask for no colors by setting TERM to dumb, or
+ // using a commandline flag.
+ return strcmp(term, "dumb") != 0;
+ }
+ return false;
+}
+
+bool Process::StandardOutHasColors() {
+ if (!StandardOutIsDisplayed())
+ return false;
+ return terminalHasColors();
+}
+
+bool Process::StandardErrHasColors() {
+ if (!StandardErrIsDisplayed())
+ return false;
+ return terminalHasColors();
+}
+
+bool Process::ColorNeedsFlush() {
+ // No, we use ANSI escape sequences.
+ return false;
+}
+
+#define COLOR(FGBG, CODE, BOLD) "\033[0;" BOLD FGBG CODE "m"
+
+#define ALLCOLORS(FGBG,BOLD) {\
+ COLOR(FGBG, "0", BOLD),\
+ COLOR(FGBG, "1", BOLD),\
+ COLOR(FGBG, "2", BOLD),\
+ COLOR(FGBG, "3", BOLD),\
+ COLOR(FGBG, "4", BOLD),\
+ COLOR(FGBG, "5", BOLD),\
+ COLOR(FGBG, "6", BOLD),\
+ COLOR(FGBG, "7", BOLD)\
+ }
+
+static const char colorcodes[2][2][8][10] = {
+ { ALLCOLORS("3",""), ALLCOLORS("3","1;") },
+ { ALLCOLORS("4",""), ALLCOLORS("4","1;") }
+};
+
+const char *Process::OutputColor(char code, bool bold, bool bg) {
+ return colorcodes[bg?1:0][bold?1:0][code&7];
+}
+
+const char *Process::OutputBold(bool bg) {
+ return "\033[1m";
+}
+
+const char *Process::ResetColor() {
+ return "\033[0m";
+}
diff --git a/lib/Support/Unix/Program.inc b/lib/Support/Unix/Program.inc
new file mode 100644
index 0000000..e06f80b
--- /dev/null
+++ b/lib/Support/Unix/Program.inc
@@ -0,0 +1,422 @@
+//===- llvm/System/Unix/Program.cpp -----------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Unix specific portion of the Program class.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//=== is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+#include <llvm/Config/config.h>
+#include "Unix.h"
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+#if HAVE_SIGNAL_H
+#include <signal.h>
+#endif
+#if HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#ifdef HAVE_POSIX_SPAWN
+#include <spawn.h>
+#if !defined(__APPLE__)
+ extern char **environ;
+#else
+#include <crt_externs.h> // _NSGetEnviron
+#endif
+#endif
+
+namespace llvm {
+using namespace sys;
+
+Program::Program() : Data_(0) {}
+
+Program::~Program() {}
+
+unsigned Program::GetPid() const {
+ uint64_t pid = reinterpret_cast<uint64_t>(Data_);
+ return static_cast<unsigned>(pid);
+}
+
+// This function just uses the PATH environment variable to find the program.
+Path
+Program::FindProgramByName(const std::string& progName) {
+
+ // Check some degenerate cases
+ if (progName.length() == 0) // no program
+ return Path();
+ Path temp;
+ if (!temp.set(progName)) // invalid name
+ return Path();
+ // Use the given path verbatim if it contains any slashes; this matches
+ // the behavior of sh(1) and friends.
+ if (progName.find('/') != std::string::npos)
+ return temp;
+
+ // At this point, the file name is valid and does not contain slashes. Search
+ // for it through the directories specified in the PATH environment variable.
+
+ // Get the path. If its empty, we can't do anything to find it.
+ const char *PathStr = getenv("PATH");
+ if (PathStr == 0)
+ return Path();
+
+ // Now we have a colon separated list of directories to search; try them.
+ size_t PathLen = strlen(PathStr);
+ while (PathLen) {
+ // Find the first colon...
+ const char *Colon = std::find(PathStr, PathStr+PathLen, ':');
+
+ // Check to see if this first directory contains the executable...
+ Path FilePath;
+ if (FilePath.set(std::string(PathStr,Colon))) {
+ FilePath.appendComponent(progName);
+ if (FilePath.canExecute())
+ return FilePath; // Found the executable!
+ }
+
+ // Nope it wasn't in this directory, check the next path in the list!
+ PathLen -= Colon-PathStr;
+ PathStr = Colon;
+
+ // Advance past duplicate colons
+ while (*PathStr == ':') {
+ PathStr++;
+ PathLen--;
+ }
+ }
+ return Path();
+}
+
+static bool RedirectIO(const Path *Path, int FD, std::string* ErrMsg) {
+ if (Path == 0) // Noop
+ return false;
+ const char *File;
+ if (Path->isEmpty())
+ // Redirect empty paths to /dev/null
+ File = "/dev/null";
+ else
+ File = Path->c_str();
+
+ // Open the file
+ int InFD = open(File, FD == 0 ? O_RDONLY : O_WRONLY|O_CREAT, 0666);
+ if (InFD == -1) {
+ MakeErrMsg(ErrMsg, "Cannot open file '" + std::string(File) + "' for "
+ + (FD == 0 ? "input" : "output"));
+ return true;
+ }
+
+ // Install it as the requested FD
+ if (dup2(InFD, FD) == -1) {
+ MakeErrMsg(ErrMsg, "Cannot dup2");
+ close(InFD);
+ return true;
+ }
+ close(InFD); // Close the original FD
+ return false;
+}
+
+#ifdef HAVE_POSIX_SPAWN
+static bool RedirectIO_PS(const Path *Path, int FD, std::string *ErrMsg,
+ posix_spawn_file_actions_t &FileActions) {
+ if (Path == 0) // Noop
+ return false;
+ const char *File;
+ if (Path->isEmpty())
+ // Redirect empty paths to /dev/null
+ File = "/dev/null";
+ else
+ File = Path->c_str();
+
+ if (int Err = posix_spawn_file_actions_addopen(&FileActions, FD,
+ File, FD == 0 ? O_RDONLY : O_WRONLY|O_CREAT, 0666))
+ return MakeErrMsg(ErrMsg, "Cannot dup2", Err);
+ return false;
+}
+#endif
+
+static void TimeOutHandler(int Sig) {
+}
+
+static void SetMemoryLimits (unsigned size)
+{
+#if HAVE_SYS_RESOURCE_H && HAVE_GETRLIMIT && HAVE_SETRLIMIT
+ struct rlimit r;
+ __typeof__ (r.rlim_cur) limit = (__typeof__ (r.rlim_cur)) (size) * 1048576;
+
+ // Heap size
+ getrlimit (RLIMIT_DATA, &r);
+ r.rlim_cur = limit;
+ setrlimit (RLIMIT_DATA, &r);
+#ifdef RLIMIT_RSS
+ // Resident set size.
+ getrlimit (RLIMIT_RSS, &r);
+ r.rlim_cur = limit;
+ setrlimit (RLIMIT_RSS, &r);
+#endif
+#ifdef RLIMIT_AS // e.g. NetBSD doesn't have it.
+ // Virtual memory.
+ getrlimit (RLIMIT_AS, &r);
+ r.rlim_cur = limit;
+ setrlimit (RLIMIT_AS, &r);
+#endif
+#endif
+}
+
+bool
+Program::Execute(const Path &path, const char **args, const char **envp,
+ const Path **redirects, unsigned memoryLimit,
+ std::string *ErrMsg) {
+ // If this OS has posix_spawn and there is no memory limit being implied, use
+ // posix_spawn. It is more efficient than fork/exec.
+#ifdef HAVE_POSIX_SPAWN
+ if (memoryLimit == 0) {
+ posix_spawn_file_actions_t FileActions;
+ posix_spawn_file_actions_init(&FileActions);
+
+ if (redirects) {
+ // Redirect stdin/stdout.
+ if (RedirectIO_PS(redirects[0], 0, ErrMsg, FileActions) ||
+ RedirectIO_PS(redirects[1], 1, ErrMsg, FileActions))
+ return false;
+ if (redirects[1] == 0 || redirects[2] == 0 ||
+ *redirects[1] != *redirects[2]) {
+ // Just redirect stderr
+ if (RedirectIO_PS(redirects[2], 2, ErrMsg, FileActions)) return false;
+ } else {
+ // If stdout and stderr should go to the same place, redirect stderr
+ // to the FD already open for stdout.
+ if (int Err = posix_spawn_file_actions_adddup2(&FileActions, 1, 2))
+ return !MakeErrMsg(ErrMsg, "Can't redirect stderr to stdout", Err);
+ }
+ }
+
+ if (!envp)
+#if !defined(__APPLE__)
+ envp = const_cast<const char **>(environ);
+#else
+ // environ is missing in dylibs.
+ envp = const_cast<const char **>(*_NSGetEnviron());
+#endif
+
+ // Explicitly initialized to prevent what appears to be a valgrind false
+ // positive.
+ pid_t PID = 0;
+ int Err = posix_spawn(&PID, path.c_str(), &FileActions, /*attrp*/0,
+ const_cast<char **>(args), const_cast<char **>(envp));
+
+ posix_spawn_file_actions_destroy(&FileActions);
+
+ if (Err)
+ return !MakeErrMsg(ErrMsg, "posix_spawn failed", Err);
+
+ Data_ = reinterpret_cast<void*>(PID);
+ return true;
+ }
+#endif
+
+ // Create a child process.
+ int child = fork();
+ switch (child) {
+ // An error occured: Return to the caller.
+ case -1:
+ MakeErrMsg(ErrMsg, "Couldn't fork");
+ return false;
+
+ // Child process: Execute the program.
+ case 0: {
+ // Redirect file descriptors...
+ if (redirects) {
+ // Redirect stdin
+ if (RedirectIO(redirects[0], 0, ErrMsg)) { return false; }
+ // Redirect stdout
+ if (RedirectIO(redirects[1], 1, ErrMsg)) { return false; }
+ if (redirects[1] && redirects[2] &&
+ *(redirects[1]) == *(redirects[2])) {
+ // If stdout and stderr should go to the same place, redirect stderr
+ // to the FD already open for stdout.
+ if (-1 == dup2(1,2)) {
+ MakeErrMsg(ErrMsg, "Can't redirect stderr to stdout");
+ return false;
+ }
+ } else {
+ // Just redirect stderr
+ if (RedirectIO(redirects[2], 2, ErrMsg)) { return false; }
+ }
+ }
+
+ // Set memory limits
+ if (memoryLimit!=0) {
+ SetMemoryLimits(memoryLimit);
+ }
+
+ // Execute!
+ if (envp != 0)
+ execve(path.c_str(),
+ const_cast<char **>(args),
+ const_cast<char **>(envp));
+ else
+ execv(path.c_str(),
+ const_cast<char **>(args));
+ // If the execve() failed, we should exit. Follow Unix protocol and
+ // return 127 if the executable was not found, and 126 otherwise.
+ // Use _exit rather than exit so that atexit functions and static
+ // object destructors cloned from the parent process aren't
+ // redundantly run, and so that any data buffered in stdio buffers
+ // cloned from the parent aren't redundantly written out.
+ _exit(errno == ENOENT ? 127 : 126);
+ }
+
+ // Parent process: Break out of the switch to do our processing.
+ default:
+ break;
+ }
+
+ Data_ = reinterpret_cast<void*>(child);
+
+ return true;
+}
+
+int
+Program::Wait(const sys::Path &path,
+ unsigned secondsToWait,
+ std::string* ErrMsg)
+{
+#ifdef HAVE_SYS_WAIT_H
+ struct sigaction Act, Old;
+
+ if (Data_ == 0) {
+ MakeErrMsg(ErrMsg, "Process not started!");
+ return -1;
+ }
+
+ // Install a timeout handler. The handler itself does nothing, but the simple
+ // fact of having a handler at all causes the wait below to return with EINTR,
+ // unlike if we used SIG_IGN.
+ if (secondsToWait) {
+ memset(&Act, 0, sizeof(Act));
+ Act.sa_handler = TimeOutHandler;
+ sigemptyset(&Act.sa_mask);
+ sigaction(SIGALRM, &Act, &Old);
+ alarm(secondsToWait);
+ }
+
+ // Parent process: Wait for the child process to terminate.
+ int status;
+ uint64_t pid = reinterpret_cast<uint64_t>(Data_);
+ pid_t child = static_cast<pid_t>(pid);
+ while (waitpid(pid, &status, 0) != child)
+ if (secondsToWait && errno == EINTR) {
+ // Kill the child.
+ kill(child, SIGKILL);
+
+ // Turn off the alarm and restore the signal handler
+ alarm(0);
+ sigaction(SIGALRM, &Old, 0);
+
+ // Wait for child to die
+ if (wait(&status) != child)
+ MakeErrMsg(ErrMsg, "Child timed out but wouldn't die");
+ else
+ MakeErrMsg(ErrMsg, "Child timed out", 0);
+
+ return -1; // Timeout detected
+ } else if (errno != EINTR) {
+ MakeErrMsg(ErrMsg, "Error waiting for child process");
+ return -1;
+ }
+
+ // We exited normally without timeout, so turn off the timer.
+ if (secondsToWait) {
+ alarm(0);
+ sigaction(SIGALRM, &Old, 0);
+ }
+
+ // Return the proper exit status. Detect error conditions
+ // so we can return -1 for them and set ErrMsg informatively.
+ int result = 0;
+ if (WIFEXITED(status)) {
+ result = WEXITSTATUS(status);
+#ifdef HAVE_POSIX_SPAWN
+ // The posix_spawn child process returns 127 on any kind of error.
+ // Following the POSIX convention for command-line tools (which posix_spawn
+ // itself apparently does not), check to see if the failure was due to some
+ // reason other than the file not existing, and return 126 in this case.
+ if (result == 127 && path.exists())
+ result = 126;
+#endif
+ if (result == 127) {
+ if (ErrMsg)
+ *ErrMsg = llvm::sys::StrError(ENOENT);
+ return -1;
+ }
+ if (result == 126) {
+ if (ErrMsg)
+ *ErrMsg = "Program could not be executed";
+ return -1;
+ }
+ } else if (WIFSIGNALED(status)) {
+ if (ErrMsg) {
+ *ErrMsg = strsignal(WTERMSIG(status));
+#ifdef WCOREDUMP
+ if (WCOREDUMP(status))
+ *ErrMsg += " (core dumped)";
+#endif
+ }
+ return -1;
+ }
+ return result;
+#else
+ if (ErrMsg)
+ *ErrMsg = "Program::Wait is not implemented on this platform yet!";
+ return -1;
+#endif
+}
+
+bool
+Program::Kill(std::string* ErrMsg) {
+ if (Data_ == 0) {
+ MakeErrMsg(ErrMsg, "Process not started!");
+ return true;
+ }
+
+ uint64_t pid64 = reinterpret_cast<uint64_t>(Data_);
+ pid_t pid = static_cast<pid_t>(pid64);
+
+ if (kill(pid, SIGKILL) != 0) {
+ MakeErrMsg(ErrMsg, "The process couldn't be killed!");
+ return true;
+ }
+
+ return false;
+}
+
+bool Program::ChangeStdinToBinary(){
+ // Do nothing, as Unix doesn't differentiate between text and binary.
+ return false;
+}
+
+bool Program::ChangeStdoutToBinary(){
+ // Do nothing, as Unix doesn't differentiate between text and binary.
+ return false;
+}
+
+bool Program::ChangeStderrToBinary(){
+ // Do nothing, as Unix doesn't differentiate between text and binary.
+ return false;
+}
+
+}
diff --git a/lib/Support/Unix/README.txt b/lib/Support/Unix/README.txt
new file mode 100644
index 0000000..3d547c2
--- /dev/null
+++ b/lib/Support/Unix/README.txt
@@ -0,0 +1,16 @@
+llvm/lib/Support/Unix README
+===========================
+
+This directory provides implementations of the lib/System classes that
+are common to two or more variants of UNIX. For example, the directory
+structure underneath this directory could look like this:
+
+Unix - only code that is truly generic to all UNIX platforms
+ Posix - code that is specific to Posix variants of UNIX
+ SUS - code that is specific to the Single Unix Specification
+ SysV - code that is specific to System V variants of UNIX
+
+As a rule, only those directories actually needing to be created should be
+created. Also, further subdirectories could be created to reflect versions of
+the various standards. For example, under SUS there could be v1, v2, and v3
+subdirectories to reflect the three major versions of SUS.
diff --git a/lib/Support/Unix/RWMutex.inc b/lib/Support/Unix/RWMutex.inc
new file mode 100644
index 0000000..ee9853e
--- /dev/null
+++ b/lib/Support/Unix/RWMutex.inc
@@ -0,0 +1,43 @@
+//= llvm/System/Unix/RWMutex.inc - Unix Reader/Writer Mutual Exclusion Lock =//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Unix specific (non-pthread) RWMutex class.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//=== is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+namespace llvm {
+
+using namespace sys;
+
+RWMutexImpl::RWMutexImpl() { }
+
+RWMutexImpl::~RWMutexImpl() { }
+
+bool RWMutexImpl::reader_acquire() {
+ return true;
+}
+
+bool RWMutexImpl::reader_release() {
+ return true;
+}
+
+bool RWMutexImpl::writer_acquire() {
+ return true;
+}
+
+bool RWMutexImpl::writer_release() {
+ return true;
+}
+
+}
diff --git a/lib/Support/Unix/Signals.inc b/lib/Support/Unix/Signals.inc
new file mode 100644
index 0000000..0a61759
--- /dev/null
+++ b/lib/Support/Unix/Signals.inc
@@ -0,0 +1,303 @@
+//===- 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 "llvm/Support/Mutex.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;
+
+static RETSIGTYPE SignalHandler(int Sig); // defined below.
+
+static SmartMutex<true> SignalsMutex;
+
+/// InterruptFunction - The function to call if ctrl-c is pressed.
+static void (*InterruptFunction)() = 0;
+
+static std::vector<sys::Path> FilesToRemove;
+static std::vector<std::pair<void(*)(void*), void*> > CallBacksToRun;
+
+// 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
+#ifdef SIGSYS
+ , SIGSYS
+#endif
+#ifdef SIGXCPU
+ , SIGXCPU
+#endif
+#ifdef SIGXFSZ
+ , SIGXFSZ
+#endif
+#ifdef SIGEMT
+ , SIGEMT
+#endif
+};
+static const int *const KillSigsEnd =
+ KillSigs + sizeof(KillSigs) / sizeof(KillSigs[0]);
+
+static unsigned NumRegisteredSignals = 0;
+static struct {
+ struct sigaction SA;
+ int SigNo;
+} RegisteredSignalInfo[(sizeof(IntSigs)+sizeof(KillSigs))/sizeof(KillSigs[0])];
+
+
+static void RegisterHandler(int Signal) {
+ assert(NumRegisteredSignals <
+ sizeof(RegisteredSignalInfo)/sizeof(RegisteredSignalInfo[0]) &&
+ "Out of space for signal handlers!");
+
+ struct sigaction NewHandler;
+
+ NewHandler.sa_handler = SignalHandler;
+ NewHandler.sa_flags = SA_NODEFER|SA_RESETHAND;
+ sigemptyset(&NewHandler.sa_mask);
+
+ // Install the new handler, save the old one in RegisteredSignalInfo.
+ sigaction(Signal, &NewHandler,
+ &RegisteredSignalInfo[NumRegisteredSignals].SA);
+ RegisteredSignalInfo[NumRegisteredSignals].SigNo = Signal;
+ ++NumRegisteredSignals;
+}
+
+static void RegisterHandlers() {
+ // If the handlers are already registered, we're done.
+ if (NumRegisteredSignals != 0) return;
+
+ std::for_each(IntSigs, IntSigsEnd, RegisterHandler);
+ std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
+}
+
+static void UnregisterHandlers() {
+ // Restore all of the signal handlers to how they were before we showed up.
+ for (unsigned i = 0, e = NumRegisteredSignals; i != e; ++i)
+ sigaction(RegisteredSignalInfo[i].SigNo,
+ &RegisteredSignalInfo[i].SA, 0);
+ NumRegisteredSignals = 0;
+}
+
+
+/// RemoveFilesToRemove - Process the FilesToRemove list. This function
+/// should be called with the SignalsMutex lock held.
+static void RemoveFilesToRemove() {
+ while (!FilesToRemove.empty()) {
+ FilesToRemove.back().eraseFromDisk(true);
+ FilesToRemove.pop_back();
+ }
+}
+
+// SignalHandler - The signal handler that runs.
+static RETSIGTYPE SignalHandler(int Sig) {
+ // Restore the signal behavior to default, so that the program actually
+ // crashes when we return and the signal reissues. This also ensures that if
+ // we crash in our signal handler that the program will terminate immediately
+ // instead of recursing in the signal handler.
+ UnregisterHandlers();
+
+ // Unmask all potentially blocked kill signals.
+ sigset_t SigMask;
+ sigfillset(&SigMask);
+ sigprocmask(SIG_UNBLOCK, &SigMask, 0);
+
+ SignalsMutex.acquire();
+ RemoveFilesToRemove();
+
+ if (std::find(IntSigs, IntSigsEnd, Sig) != IntSigsEnd) {
+ if (InterruptFunction) {
+ void (*IF)() = InterruptFunction;
+ SignalsMutex.release();
+ InterruptFunction = 0;
+ IF(); // run the interrupt function.
+ return;
+ }
+
+ SignalsMutex.release();
+ raise(Sig); // Execute the default handler.
+ return;
+ }
+
+ SignalsMutex.release();
+
+ // Otherwise if it is a fault (like SEGV) run any handler.
+ for (unsigned i = 0, e = CallBacksToRun.size(); i != e; ++i)
+ CallBacksToRun[i].first(CallBacksToRun[i].second);
+}
+
+void llvm::sys::RunInterruptHandlers() {
+ SignalsMutex.acquire();
+ RemoveFilesToRemove();
+ SignalsMutex.release();
+}
+
+void llvm::sys::SetInterruptFunction(void (*IF)()) {
+ SignalsMutex.acquire();
+ InterruptFunction = IF;
+ SignalsMutex.release();
+ RegisterHandlers();
+}
+
+// RemoveFileOnSignal - The public API
+bool llvm::sys::RemoveFileOnSignal(const sys::Path &Filename,
+ std::string* ErrMsg) {
+ SignalsMutex.acquire();
+ FilesToRemove.push_back(Filename);
+
+ SignalsMutex.release();
+
+ RegisterHandlers();
+ return false;
+}
+
+// DontRemoveFileOnSignal - The public API
+void llvm::sys::DontRemoveFileOnSignal(const sys::Path &Filename) {
+ SignalsMutex.acquire();
+ std::vector<sys::Path>::reverse_iterator I =
+ std::find(FilesToRemove.rbegin(), FilesToRemove.rend(), Filename);
+ if (I != FilesToRemove.rend())
+ FilesToRemove.erase(I.base()-1);
+ SignalsMutex.release();
+}
+
+/// AddSignalHandler - Add a function to be called when a signal is delivered
+/// to the process. The handler can have a cookie passed to it to identify
+/// what instance of the handler it is.
+void llvm::sys::AddSignalHandler(void (*FnPtr)(void *), void *Cookie) {
+ CallBacksToRun.push_back(std::make_pair(FnPtr, Cookie));
+ RegisterHandlers();
+}
+
+
+// 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(void *) {
+#ifdef HAVE_BACKTRACE
+ static void* StackTrace[256];
+ // 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);
+ const 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, "%-2d", i);
+
+ const 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
+}
+
+/// PrintStackTraceOnErrorSignal - When an error signal (such as SIBABRT or
+/// SIGSEGV) is delivered to the process, print a stack trace and then exit.
+void llvm::sys::PrintStackTraceOnErrorSignal() {
+ AddSignalHandler(PrintStackTrace, 0);
+}
+
+
+/***/
+
+// On Darwin, raise sends a signal to the main thread instead of the current
+// thread. This has the unfortunate effect that assert() and abort() will end up
+// bypassing our crash recovery attempts. We work around this for anything in
+// the same linkage unit by just defining our own versions of the assert handler
+// and abort.
+
+#ifdef __APPLE__
+
+int raise(int sig) {
+ return pthread_kill(pthread_self(), sig);
+}
+
+void __assert_rtn(const char *func,
+ const char *file,
+ int line,
+ const char *expr) {
+ if (func)
+ fprintf(stderr, "Assertion failed: (%s), function %s, file %s, line %d.\n",
+ expr, func, file, line);
+ else
+ fprintf(stderr, "Assertion failed: (%s), file %s, line %d.\n",
+ expr, file, line);
+ abort();
+}
+
+#include <signal.h>
+#include <pthread.h>
+
+void abort() {
+ raise(SIGABRT);
+ usleep(1000);
+ __builtin_trap();
+}
+
+#endif
diff --git a/lib/Support/Unix/ThreadLocal.inc b/lib/Support/Unix/ThreadLocal.inc
new file mode 100644
index 0000000..f009b72
--- /dev/null
+++ b/lib/Support/Unix/ThreadLocal.inc
@@ -0,0 +1,26 @@
+//=== llvm/System/Unix/ThreadLocal.inc - Unix Thread Local Data -*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Unix specific (non-pthread) ThreadLocal class.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//=== is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+namespace llvm {
+using namespace sys;
+ThreadLocalImpl::ThreadLocalImpl() { }
+ThreadLocalImpl::~ThreadLocalImpl() { }
+void ThreadLocalImpl::setInstance(const void* d) { data = const_cast<void*>(d);}
+const void* ThreadLocalImpl::getInstance() { return data; }
+void ThreadLocalImpl::removeInstance() { setInstance(0); }
+}
diff --git a/lib/Support/Unix/TimeValue.inc b/lib/Support/Unix/TimeValue.inc
new file mode 100644
index 0000000..5cf5a9d
--- /dev/null
+++ b/lib/Support/Unix/TimeValue.inc
@@ -0,0 +1,56 @@
+//===- Unix/TimeValue.cpp - Unix TimeValue 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 implements the Unix specific portion of the TimeValue class.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//=== is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+#include "Unix.h"
+
+namespace llvm {
+ using namespace sys;
+
+std::string TimeValue::str() const {
+ char buffer[32];
+
+ time_t ourTime = time_t(this->toEpochTime());
+#ifdef __hpux
+// note that the following line needs -D_REENTRANT on HP-UX to be picked up
+ asctime_r(localtime(&ourTime), buffer);
+#else
+ ::asctime_r(::localtime(&ourTime), buffer);
+#endif
+
+ std::string result(buffer);
+ return result.substr(0,24);
+}
+
+TimeValue TimeValue::now() {
+ struct timeval the_time;
+ timerclear(&the_time);
+ if (0 != ::gettimeofday(&the_time,0)) {
+ // This is *really* unlikely to occur because the only gettimeofday
+ // errors concern the timezone parameter which we're passing in as 0.
+ // In the unlikely case it does happen, just return MinTime, no error
+ // message needed.
+ return MinTime;
+ }
+
+ return TimeValue(
+ static_cast<TimeValue::SecondsType>( the_time.tv_sec + PosixZeroTime.seconds_ ),
+ static_cast<TimeValue::NanoSecondsType>( the_time.tv_usec *
+ NANOSECONDS_PER_MICROSECOND ) );
+}
+
+}
diff --git a/lib/Support/Unix/Unix.h b/lib/Support/Unix/Unix.h
new file mode 100644
index 0000000..c15866f
--- /dev/null
+++ b/lib/Support/Unix/Unix.h
@@ -0,0 +1,87 @@
+//===- llvm/System/Unix/Unix.h - Common Unix Include File -------*- 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 things specific to Unix implementations.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SYSTEM_UNIX_UNIX_H
+#define LLVM_SYSTEM_UNIX_UNIX_H
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//=== is guaranteed to work on all UNIX variants.
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Config/config.h" // Get autoconf configuration settings
+#include "llvm/System/Errno.h"
+#include <cstdlib>
+#include <cstdio>
+#include <cstring>
+#include <cerrno>
+#include <string>
+#include <algorithm>
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#ifdef HAVE_ASSERT_H
+#include <assert.h>
+#endif
+
+#ifdef TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# include <time.h>
+# endif
+#endif
+
+#ifdef HAVE_SYS_WAIT_H
+# include <sys/wait.h>
+#endif
+
+#ifndef WEXITSTATUS
+# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
+#endif
+
+#ifndef WIFEXITED
+# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
+#endif
+
+/// This function builds an error message into \p ErrMsg using the \p prefix
+/// string and the Unix error number given by \p errnum. If errnum is -1, the
+/// default then the value of errno is used.
+/// @brief Make an error message
+///
+/// If the error number can be converted to a string, it will be
+/// separated from prefix by ": ".
+static inline bool MakeErrMsg(
+ std::string* ErrMsg, const std::string& prefix, int errnum = -1) {
+ if (!ErrMsg)
+ return true;
+ if (errnum == -1)
+ errnum = errno;
+ *ErrMsg = prefix + ": " + llvm::sys::StrError(errnum);
+ return true;
+}
+
+#endif
diff --git a/lib/Support/Unix/system_error.inc b/lib/Support/Unix/system_error.inc
new file mode 100644
index 0000000..a382214
--- /dev/null
+++ b/lib/Support/Unix/system_error.inc
@@ -0,0 +1,34 @@
+//===- llvm/System/Unix/system_error.inc - Unix error_code ------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides the Unix specific implementation of the error_code
+// and error_condition classes.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//=== is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+using namespace llvm;
+
+std::string
+_system_error_category::message(int ev) const {
+ return _do_message::message(ev);
+}
+
+error_condition
+_system_error_category::default_error_condition(int ev) const {
+#ifdef ELAST
+ if (ev > ELAST)
+ return error_condition(ev, system_category());
+#endif // ELAST
+ return error_condition(ev, generic_category());
+}