backport: Since x86 psABIs require the function incoming stack must align at 16 bytes...

Backport r265322 from llvm upstream

Since x86 psABIs require the function incoming stack must align at 16
bytes, child process stack passed to clone should be aligned at 16
bytes.

	PR testsuite/70520
	* c-c++-common/asan/clone-test-1.c (main): Align child process
	stack to 16 bytes.

From-SVN: r235790

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 4bd9f88af496000eb729ebc9dc116399b248cecc..7bc4374dbd7a34d4feaeec11041b9d34073a734d 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2016-05-02  H.J. Lu  <hongjiu.lu@intel.com>
+
+       PR testsuite/70520
+       * c-c++-common/asan/clone-test-1.c (main): Align child process
+       stack to 16 bytes.
+
 2016-05-02  David Malcolm  <dmalcolm@redhat.com>
 
        PR c++/62314

diff --git a/gcc/testsuite/c-c++-common/asan/clone-test-1.c b/gcc/testsuite/c-c++-common/asan/clone-test-1.c
index fd187aaadd2d7ffca62f4cecc308555e35f05ad6..eeca09f3e689009543faa5f206f433c1c79fc6a2 100644 (file)
--- a/gcc/testsuite/c-c++-common/asan/clone-test-1.c
+++ b/gcc/testsuite/c-c++-common/asan/clone-test-1.c
@@ -25,7 +25,7 @@ volatile int zero = 0;
 int main(int argc, char **argv) {
   int i;
   const int kStackSize = 1 << 20;
-  char child_stack[kStackSize + 1];
+  char __attribute__((aligned(16))) child_stack[kStackSize + 1];
   char *sp = child_stack + kStackSize;  /* Stack grows down. */
   printf("Parent: %p\n", sp);
   pid_t clone_pid = clone(Child, sp, CLONE_FILES | CLONE_VM, NULL, 0, 0, 0);