rdar://problem/10492827

SBProcess.GetSTDERR() not getting stderr of the launched process

Since we are launch the inferior with:

    process = target.LaunchSimple(None, None, os.getcwd())

i.e., without specifying stdin/out/err.  A pseudo terminal is used for
handling the process I/O, and we are satisfied once the expected output
appears in process.GetSTDOUT().

llvm-svn: 147983

lldb/test/python_api/process/io/TestProcessIO.py

@@ -49,10 +49,10 @@ class ProcessIOTestCase(TestBase):
             error = process.GetSTDERR(500)
             if self.TraceOn():
                 print "output->|%s|" % output
-                print "error->|%s|" % error
-            # We are satisfied once "input line=>1" appears in stderr.
+            # Since we launched the process without specifying stdin/out/err,
+            # a pseudo terminal is used for stdout/err, and we are satisfied
+            # once "input line=>1" appears in stdout.
             # See also main.c.
-            #if "input line=>1" in error:
             if "input line=>1" in output:
                 return
             time.sleep(5)

lldb/test/python_api/process/io/main.c

@@ -6,6 +6,8 @@ int main(int argc, char const *argv[]) {
     int count = 1;
     while (fgets(line, sizeof(line), stdin)) { // Reading from stdin...
         fprintf(stderr, "input line=>%d\n", count++);
+        if (count > 3)
+            break;
     }
 
     printf("Exiting now\n");