testsuite: add test coverage for analyzer leak false +ve [PR105906]

Adding regression test coverage; I believe I fixed this leak
false positive with r13-5113-g688fc162b76dc6.

gcc/testsuite/ChangeLog:
	PR analyzer/105906
	* gcc.dg/analyzer/leak-pr105906.c: New test.

Signed-off-by: David Malcolm <dmalcolm@redhat.com>

diff --git a/gcc/testsuite/gcc.dg/analyzer/leak-pr105906.c b/gcc/testsuite/gcc.dg/analyzer/leak-pr105906.c
new file mode 100644 (file)
index 0000000..72901e4
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/analyzer/leak-pr105906.c
@@ -0,0 +1,32 @@
+/* { dg-additional-options "-Wno-analyzer-too-complex" } */
+
+#define NULL ((void *)0)
+
+#define LEN 64
+
+char **
+epystr_explode(const char *delim, char *str)
+{
+       char **out = NULL;
+       int i;
+
+       if (str == NULL || delim == NULL)
+               return NULL;
+
+       out = __builtin_malloc(LEN * sizeof(char *));
+       if (out == NULL)
+               return NULL;
+
+       for (i = 0; i < LEN; i++) {
+               out[i] = __builtin_strdup("bla");
+               if (out[i] == NULL) /* { dg-bogus "leak" } */
+                       goto freem;
+       }
+       return out;
+
+freem:
+       while (--i >= 0)
+               __builtin_free(out[i]);
+       __builtin_free(out);
+       return NULL;
+}