Bug 1122303 - nsIProcess::Run needs to handle EINTR on Mac (r=nfroyd)

xpcom/threads/nsProcessCommon.cpp

@@ -37,6 +37,7 @@
 #include <crt_externs.h>
 #include <spawn.h>
 #include <sys/wait.h>
+#include <sys/errno.h>
 #endif
 #include <sys/types.h>
 #include <signal.h>
@@ -264,7 +265,11 @@ nsProcess::Monitor(void* aArg)
 #ifdef XP_MACOSX
   int exitCode = -1;
   int status = 0;
-  if (waitpid(process->mPid, &status, 0) == process->mPid) {
+  pid_t result;
+  do {
+    result = waitpid(process->mPid, &status, 0);
+  } while (result == -1 && errno == EINTR);
+  if (result == process->mPid) {
     if (WIFEXITED(status)) {
       exitCode = WEXITSTATUS(status);
     } else if (WIFSIGNALED(status)) {