vendor/compiler-rt/compiler-rt-r224034

1 files changed, 64 insertions, 0 deletions

diff --git a/test/builtins/Unit/trampoline_setup_test.c b/test/builtins/Unit/trampoline_setup_test.c
new file mode 100644
index 0000000000000..dc30fb6df60aa
--- /dev/null
+++ b/test/builtins/Unit/trampoline_setup_test.c
@@ -0,0 +1,64 @@
+/* ===-- trampoline_setup_test.c - Test __trampoline_setup -----------------===
+ *
+ *                     The LLVM Compiler Infrastructure
+ *
+ * This file is dual licensed under the MIT and the University of Illinois Open
+ * Source Licenses. See LICENSE.TXT for details.
+ *
+ * ===----------------------------------------------------------------------===
+ */
+
+
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <sys/mman.h>
+
+/*
+ * Tests nested functions
+ * The ppc compiler generates a call to __trampoline_setup
+ * The i386 and x86_64 compilers generate a call to ___enable_execute_stack
+ */
+
+/*
+ * Note that, nested functions are not ISO C and are not supported in Clang.
+ */
+
+#if !defined(__clang__)
+
+typedef int (*nested_func_t)(int x);
+
+nested_func_t proc;
+
+int main() {
+    /* Some locals */
+    int c = 10;
+    int d = 7;
+    
+    /* Define a nested function: */
+    int bar(int x) { return x*5 + c*d; };
+
+    /* Assign global to point to nested function
+     * (really points to trampoline). */
+    proc = bar;
+    
+    /* Invoke nested function: */
+    c = 4;
+    if ( (*proc)(3) != 43 )
+        return 1;
+    d = 5;
+    if ( (*proc)(4) != 40 )
+        return 1;
+
+    /* Success. */
+    return 0;
+}
+
+#else
+
+int main() {
+    printf("skipped\n");
+    return 0;
+}
+
+#endif