/// This function waits for the program to exit. This function will block
/// the current program until the invoked program exits.
/// @returns an integer result code indicating the status of the program.
- /// A zero or positive value indicates the result code of the program. A
- /// negative value is the signal number on which it terminated.
+ /// A zero or positive value indicates the result code of the program.
+ /// -1 indicates failure to execute
+ /// -2 indicates a crash during execution or timeout
/// @see Execute
/// @brief Waits for the program to exit.
int Wait
///< expires, the child is killed and this call returns. If zero,
///< this function will wait until the child finishes or forever if
///< it doesn't.
- std::string* ErrMsg, ///< If non-zero, provides a pointer to a string
+ std::string* ErrMsg ///< If non-zero, provides a pointer to a string
///< instance in which error messages will be returned. If the string
///< is non-empty upon return an error occurred while waiting.
- const char *SignalPrefix ///< If non-zero, provides a prefix to be
- ///< prepended to ErrMsg if the process is terminated abnormally.
);
/// This function terminates the program.
const sys::Path** redirects = 0,
unsigned secondsToWait = 0,
unsigned memoryLimit = 0,
- std::string* ErrMsg = 0,
- const char *SignalPrefix = 0);
+ std::string* ErrMsg = 0);
/// A convenience function equivalent to Program prg; prg.Execute(..);
/// @see Execute
const Path** redirects,
unsigned secondsToWait,
unsigned memoryLimit,
- std::string* ErrMsg,
- const char* SignalPrefix) {
+ std::string* ErrMsg) {
Program prg;
if (prg.Execute(path, args, envp, redirects, memoryLimit, ErrMsg))
- return prg.Wait(path, secondsToWait, ErrMsg, SignalPrefix);
+ return prg.Wait(path, secondsToWait, ErrMsg);
else
return -1;
}
int
Program::Wait(const sys::Path &path,
unsigned secondsToWait,
- std::string* ErrMsg,
- const char* SignalPrefix)
+ std::string* ErrMsg)
{
#ifdef HAVE_SYS_WAIT_H
struct sigaction Act, Old;
else
MakeErrMsg(ErrMsg, "Child timed out", 0);
- return -1; // Timeout detected
+ return -2; // Timeout detected
} else if (errno != EINTR) {
MakeErrMsg(ErrMsg, "Error waiting for child process");
return -1;
}
} else if (WIFSIGNALED(status)) {
if (ErrMsg) {
- if (SignalPrefix)
- *ErrMsg = SignalPrefix;
- *ErrMsg += strsignal(WTERMSIG(status));
+ *ErrMsg = strsignal(WTERMSIG(status));
#ifdef WCOREDUMP
if (WCOREDUMP(status))
*ErrMsg += " (core dumped)";
#endif
}
- return -1;
+ // Return a special value to indicate that the process received an unhandled
+ // signal during execution as opposed to failing to execute.
+ return -2;
}
return result;
#else
int
Program::Wait(const Path &path,
unsigned secondsToWait,
- std::string* ErrMsg,
- const char* /*SignalPrefix*/) {
+ std::string* ErrMsg) {
if (Data_ == 0) {
MakeErrMsg(ErrMsg, "Process not started!");
return -1;
if (WaitForSingleObject(hProcess, millisecondsToWait) == WAIT_TIMEOUT) {
if (!TerminateProcess(hProcess, 1)) {
MakeErrMsg(ErrMsg, "Failed to terminate timed-out program.");
- return -1;
+ // -2 indicates a crash or timeout as opposed to failure to execute.
+ return -2;
}
WaitForSingleObject(hProcess, INFINITE);
}
if (!rc) {
SetLastError(err);
MakeErrMsg(ErrMsg, "Failed getting status for program.");
- return -1;
+ // -2 indicates a crash or timeout as opposed to failure to execute.
+ return -2;
}
return status;
if (result == -1)
outs() << "Execute failed: " << ErrMsg << "\n";
else
- outs() << "Crashed with signal #" << abs(result) << "\n";
+ outs() << "Crashed: " << ErrMsg << "\n";
}
if (result & 0x01000000)
outs() << "Dumped core\n";
cl::desc("Remote execution (rsh/ssh) extra options"));
}
-// Add a prefix to ErrMsg if the program is terminated by a signal to
-// distinguish compiled program crashes from other execution
-// failures. Miscompilation likely results in SIGSEGV.
-static const char *SignalPrefix = "Signal - ";
-
/// RunProgramWithTimeout - This function provides an alternate interface
/// to the sys::Program::ExecuteAndWait interface.
/// @see sys::Program::ExecuteAndWait
return
sys::Program::ExecuteAndWait(ProgramPath, Args, 0, redirects,
- NumSeconds, MemoryLimit, ErrMsg, SignalPrefix);
+ NumSeconds, MemoryLimit, ErrMsg);
}
/// RunProgramRemotelyWithTimeout - This function runs the given program
int ExitCode = RunProgramWithTimeout(OutputBinary, &ProgramArgs[0],
sys::Path(InputFile), sys::Path(OutputFile), sys::Path(OutputFile),
Timeout, MemoryLimit, Error);
- // Treat a signal (usually SIGSEGV) as part of the program output so that
- // crash-causing miscompilation is handled seamlessly.
- if (Error->find(SignalPrefix) == 0) {
+ // Treat a signal (usually SIGSEGV) or timeout as part of the program output
+ // so that crash-causing miscompilation is handled seamlessly.
+ if (ExitCode < -1) {
std::ofstream outFile(OutputFile.c_str(), std::ios_base::app);
outFile << *Error << '\n';
outFile.close();