bug-2562: New test.

Change-Id: Ib40250db1ccba839f36bc8953e13665f6cdb56d8

3 files changed, 68 insertions, 0 deletions

diff --git a/bug-2562/Makefile b/bug-2562/Makefile
new file mode 100644
index 0000000..23f8a8f
--- /dev/null
+++ b/bug-2562/Makefile
@@ -0,0 +1 @@
+include ../common.mk
diff --git a/bug-2562/build.sh b/bug-2562/build.sh
new file mode 100755
index 0000000..a5c3757
--- /dev/null
+++ b/bug-2562/build.sh
@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+case ${TARGET} in
+    arm*)
+	CFLAGS="-marm -fpie"
+	;;
+    *)
+	echo "$(basename $(pwd)): SKIP" > result.txt
+	exit 0
+	;;
+esac
+
+echo "$(basename $(pwd)): FAIL" > result.txt
+set -x
+${CC} $CFLAGS -S some_module.c -o some_module.s
+grep '.word	some_weak_func' some_module.s | grep GOT
+
+set +x
+echo "$(basename $(pwd)): PASS" > result.txt
diff --git a/bug-2562/some_module.c b/bug-2562/some_module.c
new file mode 100644
index 0000000..628359c
--- /dev/null
+++ b/bug-2562/some_module.c
@@ -0,0 +1,47 @@
+
+int printf(const char *__restrict __format, ...);
+
+int res_direct_call;
+int res_pointer_call;
+
+int (*__weak_func_ptr )(void);
+
+int __attribute__((weak)) some_weak_func(void)
+{
+    return 10;
+}
+
+void call_weak_directly(void)
+{
+    res_direct_call = some_weak_func();
+}
+
+void save_weak_func_pointer(void)
+{
+    __weak_func_ptr = some_weak_func;
+}
+
+void call_weak_by_pointer(void)
+{
+    res_pointer_call = __weak_func_ptr();
+}
+
+void test_weak_funcion_call(void)
+{
+    printf("Entering test_weak_funcion_call\n");
+
+    save_weak_func_pointer();
+
+    printf("This line is to avoid optimization in further call_weak_by_pointer\n");
+
+    call_weak_by_pointer();
+    printf("  res_pointer_call = %d\n", res_pointer_call);
+
+    call_weak_directly();
+    printf("  res_direct_call = %d\n", res_direct_call);
+
+    if (res_direct_call == res_pointer_call)
+        printf("All Ok\n");
+    else
+        printf("ERROR: Results from direct call and from call via pointer differs\n");
+}