[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/libc/glibc/glibc-2.22/stdlib/tst-setcontext.c b/ap/libc/glibc/glibc-2.22/stdlib/tst-setcontext.c
new file mode 100644
index 0000000..d37fca7
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.22/stdlib/tst-setcontext.c
@@ -0,0 +1,244 @@
+/* Copyright (C) 2001-2015 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ucontext.h>
+#include <unistd.h>
+
+static ucontext_t ctx[3];
+
+static int was_in_f1;
+static int was_in_f2;
+
+static char st2[32768];
+
+static void
+f1 (int a0, int a1, int a2, int a3)
+{
+ printf ("start f1(a0=%x,a1=%x,a2=%x,a3=%x)\n", a0, a1, a2, a3);
+
+ if (a0 != 1 || a1 != 2 || a2 != 3 || a3 != -4)
+ {
+ puts ("arg mismatch");
+ exit (-1);
+ }
+
+ if (swapcontext (&ctx[1], &ctx[2]) != 0)
+ {
+ printf ("%s: swapcontext: %m\n", __FUNCTION__);
+ exit (1);
+ }
+ puts ("finish f1");
+ was_in_f1 = 1;
+}
+
+static void
+f2 (void)
+{
+ char on_stack[1];
+
+ puts ("start f2");
+
+ printf ("&on_stack=%p\n", on_stack);
+ if (on_stack < st2 || on_stack >= st2 + sizeof (st2))
+ {
+ printf ("%s: memory stack is not where it belongs!", __FUNCTION__);
+ exit (1);
+ }
+
+ if (swapcontext (&ctx[2], &ctx[1]) != 0)
+ {
+ printf ("%s: swapcontext: %m\n", __FUNCTION__);
+ exit (1);
+ }
+ puts ("finish f2");
+ was_in_f2 = 1;
+}
+
+void
+test_stack (volatile int a, volatile int b,
+ volatile int c, volatile int d)
+{
+ volatile int e = 5;
+ volatile int f = 6;
+ ucontext_t uc;
+
+ /* Test for cases where getcontext is clobbering the callers
+ stack, including parameters. */
+ getcontext (&uc);
+
+ if (a != 1)
+ {
+ printf ("%s: getcontext clobbers parm a\n", __FUNCTION__);
+ exit (1);
+ }
+
+ if (b != 2)
+ {
+ printf ("%s: getcontext clobbers parm b\n", __FUNCTION__);
+ exit (1);
+ }
+
+ if (c != 3)
+ {
+ printf ("%s: getcontext clobbers parm c\n", __FUNCTION__);
+ exit (1);
+ }
+
+ if (d != 4)
+ {
+ printf ("%s: getcontext clobbers parm d\n", __FUNCTION__);
+ exit (1);
+ }
+
+ if (e != 5)
+ {
+ printf ("%s: getcontext clobbers varible e\n", __FUNCTION__);
+ exit (1);
+ }
+
+ if (f != 6)
+ {
+ printf ("%s: getcontext clobbers variable f\n", __FUNCTION__);
+ exit (1);
+ }
+}
+
+volatile int global;
+
+
+static int back_in_main;
+
+
+static void
+check_called (void)
+{
+ if (back_in_main == 0)
+ {
+ puts ("program did not reach main again");
+ _exit (1);
+ }
+}
+
+
+int
+main (void)
+{
+ atexit (check_called);
+
+ char st1[32768];
+ stack_t stack_before, stack_after;
+
+ sigaltstack (NULL, &stack_before);
+
+ puts ("making contexts");
+ if (getcontext (&ctx[1]) != 0)
+ {
+ if (errno == ENOSYS)
+ {
+ back_in_main = 1;
+ exit (0);
+ }
+
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (1);
+ }
+
+ test_stack (1, 2, 3, 4);
+
+ /* Play some tricks with this context. */
+ if (++global == 1)
+ if (setcontext (&ctx[1]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (1);
+ }
+ if (global != 2)
+ {
+ printf ("%s: 'global' not incremented twice\n", __FUNCTION__);
+ exit (1);
+ }
+
+ ctx[1].uc_stack.ss_sp = st1;
+ ctx[1].uc_stack.ss_size = sizeof st1;
+ ctx[1].uc_link = &ctx[0];
+ {
+ ucontext_t tempctx = ctx[1];
+ makecontext (&ctx[1], (void (*) (void)) f1, 4, 1, 2, 3, -4);
+
+ /* Without this check, a stub makecontext can make us spin forever. */
+ if (memcmp (&tempctx, &ctx[1], sizeof ctx[1]) == 0)
+ {
+ puts ("makecontext was a no-op, presuming not implemented");
+ return 0;
+ }
+ }
+
+ if (getcontext (&ctx[2]) != 0)
+ {
+ printf ("%s: second getcontext: %m\n", __FUNCTION__);
+ exit (1);
+ }
+ ctx[2].uc_stack.ss_sp = st2;
+ ctx[2].uc_stack.ss_size = sizeof st2;
+ ctx[2].uc_link = &ctx[1];
+ makecontext (&ctx[2], f2, 0);
+
+ puts ("swapping contexts");
+ if (swapcontext (&ctx[0], &ctx[2]) != 0)
+ {
+ printf ("%s: swapcontext: %m\n", __FUNCTION__);
+ exit (1);
+ }
+ puts ("back at main program");
+ back_in_main = 1;
+
+ sigaltstack (NULL, &stack_after);
+
+ if (was_in_f1 == 0)
+ {
+ puts ("didn't reach f1");
+ exit (1);
+ }
+ if (was_in_f2 == 0)
+ {
+ puts ("didn't reach f2");
+ exit (1);
+ }
+
+ /* Check sigaltstack state is not clobbered as in BZ #16629. */
+ if (stack_before.ss_sp != stack_after.ss_sp)
+ {
+ printf ("stack ss_sp mismatch: %p %p\n",
+ stack_before.ss_sp, stack_after.ss_sp);
+ exit (1);
+ }
+
+ if (stack_before.ss_size != stack_after.ss_size)
+ {
+ printf ("stack ss_size mismatch: %zd %zd\n",
+ stack_before.ss_size, stack_after.ss_size);
+ exit (1);
+ }
+
+ puts ("test succeeded");
+ return 0;
+}