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Add support for killing the program if it executes for too long.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15158 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-07-24 07:41:31 +00:00
parent 060913cce4
commit de0213b9f5
3 changed files with 49 additions and 17 deletions
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5
include/Support/SystemUtils.h
View File

@ -38,14 +38,15 @@ std::string FindExecutable(const std::string &ExeName,
/// RunProgramWithTimeout - This function executes the specified program, with
/// the specified null-terminated argument array, with the stdin/out/err fd's
/// redirected, with a timeout specified on the commandline. This terminates
/// redirected, with a timeout specified by the last argument. This terminates
/// the calling program if there is an error executing the specified program.
/// It returns the return value of the program, or -1 if a timeout is detected.
///
int RunProgramWithTimeout(const std::string &ProgramPath, const char **Args,
const std::string &StdInFile = "",
const std::string &StdOutFile = "",
const std::string &StdErrFile = "");
const std::string &StdErrFile = "",
unsigned NumSeconds = 0);
/// ExecWait - Execute a program with the given arguments and environment and
/// wait for it to terminate.

5
include/llvm/Support/SystemUtils.h
View File

@ -38,14 +38,15 @@ std::string FindExecutable(const std::string &ExeName,
/// RunProgramWithTimeout - This function executes the specified program, with
/// the specified null-terminated argument array, with the stdin/out/err fd's
/// redirected, with a timeout specified on the commandline. This terminates
/// redirected, with a timeout specified by the last argument. This terminates
/// the calling program if there is an error executing the specified program.
/// It returns the return value of the program, or -1 if a timeout is detected.
///
int RunProgramWithTimeout(const std::string &ProgramPath, const char **Args,
const std::string &StdInFile = "",
const std::string &StdOutFile = "",
const std::string &StdErrFile = "");
const std::string &StdErrFile = "",
unsigned NumSeconds = 0);
/// ExecWait - Execute a program with the given arguments and environment and
/// wait for it to terminate.

56
lib/Support/SystemUtils.cpp
View File

@ -125,9 +125,14 @@ static void RedirectFD(const std::string &File, int FD) {
close(InFD); // Close the original FD
}
static bool Timeout = false;
static void TimeOutHandler(int Sig) {
Timeout = true;
}
/// RunProgramWithTimeout - This function executes the specified program, with
/// the specified null-terminated argument array, with the stdin/out/err fd's
/// redirected, with a timeout specified on the command line. This terminates
/// redirected, with a timeout specified by the last argument. This terminates
/// the calling program if there is an error executing the specified program.
/// It returns the return value of the program, or -1 if a timeout is detected.
///
@ -135,9 +140,8 @@ int llvm::RunProgramWithTimeout(const std::string &ProgramPath,
const char **Args,
const std::string &StdInFile,
const std::string &StdOutFile,
const std::string &StdErrFile) {
// FIXME: install sigalarm handler here for timeout...
const std::string &StdErrFile,
unsigned NumSeconds) {
#ifdef HAVE_SYS_WAIT_H
int Child = fork();
switch (Child) {
@ -165,24 +169,50 @@ int llvm::RunProgramWithTimeout(const std::string &ProgramPath,
// Make sure all output has been written while waiting
std::cout << std::flush;
// Install a timeout handler.
Timeout = false;
struct sigaction Act, Old;
Act.sa_sigaction = 0;
Act.sa_handler = TimeOutHandler;
Act.sa_flags = SA_NOMASK;
sigaction(SIGALRM, &Act, &Old);
// Set the timeout if one is set.
if (NumSeconds)
alarm(NumSeconds);
int Status;
if (wait(&Status) != Child) {
while (wait(&Status) != Child) {
if (errno == EINTR) {
static bool FirstTimeout = true;
if (FirstTimeout) {
std::cout <<
if (Timeout) {
static bool FirstTimeout = true;
if (FirstTimeout) {
std::cout <<
"*** Program execution timed out! This mechanism is designed to handle\n"
" programs stuck in infinite loops gracefully. The -timeout option\n"
" can be used to change the timeout threshold or disable it completely\n"
" (with -timeout=0). This message is only displayed once.\n";
FirstTimeout = false;
FirstTimeout = false;
}
}
return -1; // Timeout detected
}
std::cerr << "Error waiting for child process!\n";
exit(1);
// Kill the child.
kill(Child, SIGKILL);
if (wait(&Status) != Child)
std::cerr << "Something funny happened waiting for the child!\n";
alarm(0);
sigaction(SIGALRM, &Old, 0);
return -1; // Timeout detected
} else {
std::cerr << "Error waiting for child process!\n";
exit(1);
}
}
alarm(0);
sigaction(SIGALRM, &Old, 0);
return Status;
#else