//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Reid Spencer and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#include <llvm/Config/config.h>
#include "Unix.h"
+#include <iostream>
+#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>
-#ifdef HAVE_SYS_WAIT_H
-#include <sys/wait.h>
#endif
-extern char** environ;
-
namespace llvm {
using namespace sys;
if (progName.length() == 0) // no program
return Path();
Path temp;
- if (!temp.setFile(progName)) // invalid name
+ if (!temp.set(progName)) // invalid name
return Path();
- if (temp.executable()) // already executable as is
+ // FIXME: have to check for absolute filename - we cannot assume anything
+ // about "." being in $PATH
+ if (temp.canExecute()) // already executable as is
return temp;
// At this point, the file name is valid and its not executable
return Path();
// Now we have a colon separated list of directories to search; try them.
- unsigned PathLen = strlen(PathStr);
+ 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.setDirectory(std::string(PathStr,Colon))) {
- FilePath.appendFile(progName);
- if (FilePath.executable())
+ if (FilePath.set(std::string(PathStr,Colon))) {
+ FilePath.appendComponent(progName);
+ if (FilePath.canExecute())
return FilePath; // Found the executable!
}
return Path();
}
-//
+static bool RedirectIO(const Path *Path, int FD, std::string* ErrMsg) {
+ if (Path == 0)
+ // Noop
+ return false;
+ std::string File;
+ if (Path->isEmpty())
+ // Redirect empty paths to /dev/null
+ File = "/dev/null";
+ else
+ File = Path->toString();
+
+ // Open the file
+ int InFD = open(File.c_str(), FD == 0 ? O_RDONLY : O_WRONLY|O_CREAT, 0666);
+ if (InFD == -1) {
+ MakeErrMsg(ErrMsg, "Cannot open file '" + File + "' for "
+ + (FD == 0 ? "input" : "output"));
+ return true;
+ }
+
+ // Install it as the requested FD
+ if (-1 == dup2(InFD, FD)) {
+ MakeErrMsg(ErrMsg, "Cannot dup2");
+ return true;
+ }
+ close(InFD); // Close the original FD
+ return false;
+}
+
+static bool Timeout = false;
+static void TimeOutHandler(int Sig) {
+ Timeout = true;
+}
+
+static void SetMemoryLimits (unsigned size)
+{
+#if HAVE_SYS_RESOURCE_H
+ 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
+}
+
int
Program::ExecuteAndWait(const Path& path,
- const std::vector<std::string>& args) {
- if (!path.executable())
- throw path.toString() + " is not executable";
+ const char** args,
+ const char** envp,
+ const Path** redirects,
+ unsigned secondsToWait,
+ unsigned memoryLimit,
+ std::string* ErrMsg)
+{
+ if (!path.canExecute()) {
+ if (ErrMsg)
+ *ErrMsg = path.toString() + " is not executable";
+ return -1;
+ }
#ifdef HAVE_SYS_WAIT_H
- // Create local versions of the parameters that can be passed into execve()
- // without creating const problems.
- const char* argv[ args.size() + 2 ];
- unsigned index = 0;
- std::string progname(path.getLast());
- argv[index++] = progname.c_str();
- for (unsigned i = 0; i < args.size(); i++)
- argv[index++] = args[i].c_str();
- argv[index] = 0;
-
// Create a child process.
- switch (fork()) {
+ int child = fork();
+ switch (child) {
// An error occured: Return to the caller.
case -1:
- ThrowErrno(std::string("Couldn't execute program '") + path.toString() +
- "'");
- break;
+ MakeErrMsg(ErrMsg, "Couldn't fork");
+ return -1;
// Child process: Execute the program.
- case 0:
- execve (path.c_str(), (char** const)argv, environ);
+ case 0: {
+ // Redirect file descriptors...
+ if (redirects) {
+ // Redirect stdin
+ if (RedirectIO(redirects[0], 0, ErrMsg)) { return -1; }
+ // Redirect stdout
+ if (RedirectIO(redirects[1], 1, ErrMsg)) { return -1; }
+ 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 -1;
+ }
+ } else {
+ // Just redirect stderr
+ if (RedirectIO(redirects[2], 2, ErrMsg)) { return -1; }
+ }
+ }
+
+ // Set memory limits
+ if (memoryLimit!=0) {
+ SetMemoryLimits(memoryLimit);
+ }
+
+ // Execute!
+ if (envp != 0)
+ execve (path.c_str(), (char**)args, (char**)envp);
+ else
+ execv (path.c_str(), (char**)args);
// If the execve() failed, we should exit and let the parent pick up
// our non-zero exit status.
exit (errno);
+ }
// Parent process: Break out of the switch to do our processing.
default:
break;
}
+ // Make sure stderr and stdout have been flushed
+ std::cerr << std::flush;
+ std::cout << std::flush;
+ fsync(1);
+ fsync(2);
+
+ struct sigaction Act, Old;
+
+ // Install a timeout handler.
+ if (secondsToWait) {
+ Timeout = false;
+ Act.sa_sigaction = 0;
+ Act.sa_handler = TimeOutHandler;
+ sigemptyset(&Act.sa_mask);
+ Act.sa_flags = 0;
+ sigaction(SIGALRM, &Act, &Old);
+ alarm(secondsToWait);
+ }
+
// Parent process: Wait for the child process to terminate.
int status;
- if ((::wait (&status)) == -1)
- ThrowErrno(std::string("Failed waiting for program '") + path.toString()
- + "'");
+ while (wait(&status) != 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);
- // If the program exited normally with a zero exit status, return success!
- if (WIFEXITED (status))
- return WEXITSTATUS(status);
+ // 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. 0=success, >0 is programs' exit status,
+ // <0 means a signal was returned, -9999999 means the program dumped core.
+ int result = 0;
+ if (WIFEXITED(status))
+ result = WEXITSTATUS(status);
else if (WIFSIGNALED(status))
- throw std::string("Program '") + path.toString() +
- "' received terminating signal.";
- else
- return 0;
-
+ result = 0 - WTERMSIG(status);
+#ifdef WCOREDUMP
+ else if (WCOREDUMP(status))
+ result |= 0x01000000;
+#endif
+ return result;
#else
- throw std::string("Program::ExecuteAndWait not implemented on this platform!\n");
+ return -99;
#endif
+
+}
+
+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;
}
}
-// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab
projects / oota-llvm.git / blobdiff