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Make Program::Wait provide an error message string for errors

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executing the child process and abnormal child process termination.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117661 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2010-10-29 16:39:01 +00:00
parent da54c6dd4f
commit 695e85d477
1 changed files with 19 additions and 9 deletions
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28
lib/System/Unix/Program.inc
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@ -350,22 +350,32 @@ Program::Wait(unsigned secondsToWait,
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.
// 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))
if (WIFEXITED(status)) {
result = WEXITSTATUS(status);
else if (WIFSIGNALED(status))
result = 0 - WTERMSIG(status);
if (result == 127) {
*ErrMsg = llvm::sys::StrError(ENOENT);
return -1;
}
if (result == 126) {
*ErrMsg = "Program could not be executed";
return -1;
}
} else if (WIFSIGNALED(status)) {
*ErrMsg = strsignal(WTERMSIG(status));
#ifdef WCOREDUMP
else if (WCOREDUMP(status))
result |= 0x01000000;
if (WCOREDUMP(status))
*ErrMsg += " (core dumped)";
#endif
return -1;
}
return result;
#else
return -99;
*ErrMsg = "Program::Wait is not implemented on this platform yet!";
return -1;
#endif
}
bool