[testsuite] Reintroduce test to check leaking.

It wasn't python leaking, it was lldb. Thanks to Pavel for the
explanation. Pointy-hat to me.

llvm-svn: 324919

1 files changed, 28 insertions, 0 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/functionalities/avoids-fd-leak/main.c b/lldb/packages/Python/lldbsuite/test/functionalities/avoids-fd-leak/main.c
new file mode 100644
index 00000000000..5bdf227928e
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/functionalities/avoids-fd-leak/main.c
@@ -0,0 +1,28 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdio.h>
+
+int
+main (int argc, char const **argv)
+{
+    struct stat buf;
+    int i, rv = 0; // Set breakpoint here.
+
+    // Make sure stdin/stdout/stderr exist.
+    for (i = 0; i <= 2; ++i) {
+        if (fstat(i, &buf) != 0)
+            return 1;
+    }
+
+    // Make sure no other file descriptors are open.
+    for (i = 3; i <= 256; ++i) {
+        if (fstat(i, &buf) == 0 || errno != EBADF) {
+            fprintf(stderr, "File descriptor %d is open.\n", i);
+            rv = 2;
+        }
+    }
+
+    return rv;
+}