[12/12] Add tests for setcontext on the context from makecontext
Commit Message
* stdlib/Makefile ((tests): Add tst-setcontext6, tst-setcontext7,
tst-setcontext8 and tst-setcontext9.
* stdlib/tst-setcontext6.c: New file.
* stdlib/tst-setcontext7.c: Likewise.
* stdlib/tst-setcontext8.c: Likewise.
* stdlib/tst-setcontext9.c: Likewise.
---
stdlib/Makefile | 3 +-
stdlib/tst-setcontext6.c | 76 +++++++++++++++++++++++++++++
stdlib/tst-setcontext7.c | 96 +++++++++++++++++++++++++++++++++++++
stdlib/tst-setcontext8.c | 81 +++++++++++++++++++++++++++++++
stdlib/tst-setcontext9.c | 100 +++++++++++++++++++++++++++++++++++++++
5 files changed, 355 insertions(+), 1 deletion(-)
create mode 100644 stdlib/tst-setcontext6.c
create mode 100644 stdlib/tst-setcontext7.c
create mode 100644 stdlib/tst-setcontext8.c
create mode 100644 stdlib/tst-setcontext9.c
Comments
On 07/21/2018 10:20 AM, H.J. Lu wrote:
> * stdlib/Makefile ((tests): Add tst-setcontext6, tst-setcontext7,
> tst-setcontext8 and tst-setcontext9.
> * stdlib/tst-setcontext6.c: New file.
> * stdlib/tst-setcontext7.c: Likewise.
> * stdlib/tst-setcontext8.c: Likewise.
> * stdlib/tst-setcontext9.c: Likewise.
OK for 2.28 if you use atomics instead of volatile int.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
> ---
> stdlib/Makefile | 3 +-
> stdlib/tst-setcontext6.c | 76 +++++++++++++++++++++++++++++
> stdlib/tst-setcontext7.c | 96 +++++++++++++++++++++++++++++++++++++
> stdlib/tst-setcontext8.c | 81 +++++++++++++++++++++++++++++++
> stdlib/tst-setcontext9.c | 100 +++++++++++++++++++++++++++++++++++++++
> 5 files changed, 355 insertions(+), 1 deletion(-)
> create mode 100644 stdlib/tst-setcontext6.c
> create mode 100644 stdlib/tst-setcontext7.c
> create mode 100644 stdlib/tst-setcontext8.c
> create mode 100644 stdlib/tst-setcontext9.c
>
> diff --git a/stdlib/Makefile b/stdlib/Makefile
> index 8db4f1d35a..638306bb5c 100644
> --- a/stdlib/Makefile
> +++ b/stdlib/Makefile
> @@ -86,7 +86,8 @@ tests := tst-strtol tst-strtod testmb testrand testsort testdiv \
> test-on_exit-race test-dlclose-exit-race \
> tst-makecontext-align test-bz22786 tst-strtod-nan-sign \
> tst-swapcontext1 tst-swapcontext2 tst-setcontext4 \
> - tst-setcontext5
> + tst-setcontext5 tst-setcontext6 tst-setcontext7 \
> + tst-setcontext8 tst-setcontext9
OK.
>
> tests-internal := tst-strtod1i tst-strtod3 tst-strtod4 tst-strtod5i \
> tst-tls-atexit tst-tls-atexit-nodelete
> diff --git a/stdlib/tst-setcontext6.c b/stdlib/tst-setcontext6.c
> new file mode 100644
> index 0000000000..c719e2d678
> --- /dev/null
> +++ b/stdlib/tst-setcontext6.c
> @@ -0,0 +1,76 @@
> +/* Check getcontext and setcontext on the context from makecontext.
OK.
> + Copyright (C) 2018 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 <stdio.h>
> +#include <stdlib.h>
> +#include <ucontext.h>
> +#include <unistd.h>
> +
> +static ucontext_t ctx[3];
> +static volatile int done;
OK, but I'd prefer a way around this needing to be volatile, like using atomics.
> +
> +static void
> +f1 (void)
> +{
> + printf ("start f1\n");
> + if (!done)
> + {
> + if (getcontext (&ctx[2]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + if (done)
> + exit (EXIT_SUCCESS);
> + }
> + done++;
> + if (setcontext (&ctx[2]) != 0)
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> +}
> +
> +static int
> +do_test (void)
> +{
> + char st1[32768];
> + puts ("making contexts");
> + if (getcontext (&ctx[0]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + if (getcontext (&ctx[1]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
OK.
> + }
> + ctx[1].uc_stack.ss_sp = st1;
> + ctx[1].uc_stack.ss_size = sizeof st1;
> + ctx[1].uc_link = &ctx[0];
> + makecontext (&ctx[1], (void (*) (void)) f1, 0);
> + if (setcontext (&ctx[1]) != 0)
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
OK.
> + exit (EXIT_FAILURE);
> +}
> +
> +#include <support/test-driver.c>
> diff --git a/stdlib/tst-setcontext7.c b/stdlib/tst-setcontext7.c
> new file mode 100644
> index 0000000000..e331e511ef
> --- /dev/null
> +++ b/stdlib/tst-setcontext7.c
> @@ -0,0 +1,96 @@
> +/* Check setcontext on the context from makecontext.
OK.
> + Copyright (C) 2018 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 <stdio.h>
> +#include <stdlib.h>
> +#include <ucontext.h>
> +#include <unistd.h>
> +
> +static ucontext_t ctx[5];
> +static volatile int done;
Likewise (see above).
> +
> +static void
> +f1 (void)
> +{
> + puts ("start f1");
> + if (!done)
> + {
> + if (getcontext (&ctx[2]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + if (done)
> + {
> + puts ("set context in f1");
> + if (setcontext (&ctx[3]) != 0)
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + }
OK.
> + }
> + done++;
> + puts ("swap contexts in f1");
> + if (swapcontext (&ctx[4], &ctx[2]) != 0)
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + puts ("end f1");
> + exit (done == 2 ? EXIT_SUCCESS : EXIT_FAILURE);
OK.
> +}
> +
> +static int
> +do_test (void)
> +{
> + char st1[32768];
> + puts ("making contexts");
> + if (getcontext (&ctx[0]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + if (getcontext (&ctx[1]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + ctx[1].uc_stack.ss_sp = st1;
> + ctx[1].uc_stack.ss_size = sizeof st1;
> + ctx[1].uc_link = &ctx[0];
> + makecontext (&ctx[1], (void (*) (void)) f1, 0);
> + puts ("swap contexts");
> + if (swapcontext (&ctx[3], &ctx[1]) != 0)
OK.
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + if (done != 1)
> + exit (EXIT_FAILURE);
> + done++;
> + puts ("set context");
> + if (setcontext (&ctx[4]) != 0)
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + exit (EXIT_FAILURE);
> +}
> +
> +#include <support/test-driver.c>
> diff --git a/stdlib/tst-setcontext8.c b/stdlib/tst-setcontext8.c
> new file mode 100644
> index 0000000000..a7febf6c67
> --- /dev/null
> +++ b/stdlib/tst-setcontext8.c
> @@ -0,0 +1,81 @@
> +/* Check getcontext and setcontext on the context from makecontext.
OK.
> + Copyright (C) 2018 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 <stdio.h>
> +#include <stdlib.h>
> +#include <ucontext.h>
> +#include <unistd.h>
> +
> +static ucontext_t ctx[3];
> +static volatile int done;
> +
> +static void
> +__attribute__((noinline, noclone))
> +f2 (void)
> +{
> + printf ("start f2\n");
> + done++;
> + if (setcontext (&ctx[2]) != 0)
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> +}
> +
> +static void
> +f1 (void)
> +{
> + printf ("start f1\n");
> + if (getcontext (&ctx[2]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + if (done)
> + exit (EXIT_SUCCESS);
> + f2 ();
> +}
> +
OK.
> +static int
> +do_test (void)
> +{
> + char st1[32768];
> + puts ("making contexts");
> + if (getcontext (&ctx[0]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + if (getcontext (&ctx[1]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + ctx[1].uc_stack.ss_sp = st1;
> + ctx[1].uc_stack.ss_size = sizeof st1;
> + ctx[1].uc_link = &ctx[0];
> + makecontext (&ctx[1], (void (*) (void)) f1, 0);
OK.
> + if (setcontext (&ctx[1]) != 0)
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + exit (EXIT_FAILURE);
> +}
> +
> +#include <support/test-driver.c>
OK. Similar to the original one.
> diff --git a/stdlib/tst-setcontext9.c b/stdlib/tst-setcontext9.c
> new file mode 100644
> index 0000000000..53609d4b10
> --- /dev/null
> +++ b/stdlib/tst-setcontext9.c
> @@ -0,0 +1,100 @@
> +/* Check setcontext on the context from makecontext.
> + Copyright (C) 2018 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 <stdio.h>
> +#include <stdlib.h>
> +#include <ucontext.h>
> +#include <unistd.h>
> +
> +static ucontext_t ctx[5];
> +static volatile int done;
> +
> +static void
> +__attribute__((noinline, noclone))
> +f2 (void)
> +{
> + done++;
> + puts ("swap contexts in f2");
> + if (swapcontext (&ctx[4], &ctx[2]) != 0)
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + puts ("end f2");
> + exit (done == 2 ? EXIT_SUCCESS : EXIT_FAILURE);
> +}
> +
> +static void
> +f1 (void)
> +{
> + puts ("start f1");
> + if (getcontext (&ctx[2]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + if (done)
OK.
> + {
> + puts ("set context in f1");
> + if (setcontext (&ctx[3]) != 0)
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + }
> + f2 ();
> +}
> +
> +static int
> +do_test (void)
> +{
> + char st1[32768];
> + puts ("making contexts");
> + if (getcontext (&ctx[0]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + if (getcontext (&ctx[1]) != 0)
> + {
> + printf ("%s: getcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + ctx[1].uc_stack.ss_sp = st1;
> + ctx[1].uc_stack.ss_size = sizeof st1;
> + ctx[1].uc_link = &ctx[0];
> + makecontext (&ctx[1], (void (*) (void)) f1, 0);
> + puts ("swap contexts");
> + if (swapcontext (&ctx[3], &ctx[1]) != 0)
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + if (done != 1)
> + exit (EXIT_FAILURE);
> + done++;
> + puts ("set context");
> + if (setcontext (&ctx[4]) != 0)
> + {
> + printf ("%s: setcontext: %m\n", __FUNCTION__);
> + exit (EXIT_FAILURE);
> + }
> + exit (EXIT_FAILURE);
> +}
> +
> +#include <support/test-driver.c>
>
OK.
Cheers,Carlos.
@@ -86,7 +86,8 @@ tests := tst-strtol tst-strtod testmb testrand testsort testdiv \
test-on_exit-race test-dlclose-exit-race \
tst-makecontext-align test-bz22786 tst-strtod-nan-sign \
tst-swapcontext1 tst-swapcontext2 tst-setcontext4 \
- tst-setcontext5
+ tst-setcontext5 tst-setcontext6 tst-setcontext7 \
+ tst-setcontext8 tst-setcontext9
tests-internal := tst-strtod1i tst-strtod3 tst-strtod4 tst-strtod5i \
tst-tls-atexit tst-tls-atexit-nodelete
new file mode 100644
@@ -0,0 +1,76 @@
+/* Check getcontext and setcontext on the context from makecontext.
+ Copyright (C) 2018 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 <stdio.h>
+#include <stdlib.h>
+#include <ucontext.h>
+#include <unistd.h>
+
+static ucontext_t ctx[3];
+static volatile int done;
+
+static void
+f1 (void)
+{
+ printf ("start f1\n");
+ if (!done)
+ {
+ if (getcontext (&ctx[2]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ if (done)
+ exit (EXIT_SUCCESS);
+ }
+ done++;
+ if (setcontext (&ctx[2]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+}
+
+static int
+do_test (void)
+{
+ char st1[32768];
+ puts ("making contexts");
+ if (getcontext (&ctx[0]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ if (getcontext (&ctx[1]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ ctx[1].uc_stack.ss_sp = st1;
+ ctx[1].uc_stack.ss_size = sizeof st1;
+ ctx[1].uc_link = &ctx[0];
+ makecontext (&ctx[1], (void (*) (void)) f1, 0);
+ if (setcontext (&ctx[1]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ exit (EXIT_FAILURE);
+}
+
+#include <support/test-driver.c>
new file mode 100644
@@ -0,0 +1,96 @@
+/* Check setcontext on the context from makecontext.
+ Copyright (C) 2018 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 <stdio.h>
+#include <stdlib.h>
+#include <ucontext.h>
+#include <unistd.h>
+
+static ucontext_t ctx[5];
+static volatile int done;
+
+static void
+f1 (void)
+{
+ puts ("start f1");
+ if (!done)
+ {
+ if (getcontext (&ctx[2]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ if (done)
+ {
+ puts ("set context in f1");
+ if (setcontext (&ctx[3]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ }
+ }
+ done++;
+ puts ("swap contexts in f1");
+ if (swapcontext (&ctx[4], &ctx[2]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ puts ("end f1");
+ exit (done == 2 ? EXIT_SUCCESS : EXIT_FAILURE);
+}
+
+static int
+do_test (void)
+{
+ char st1[32768];
+ puts ("making contexts");
+ if (getcontext (&ctx[0]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ if (getcontext (&ctx[1]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ ctx[1].uc_stack.ss_sp = st1;
+ ctx[1].uc_stack.ss_size = sizeof st1;
+ ctx[1].uc_link = &ctx[0];
+ makecontext (&ctx[1], (void (*) (void)) f1, 0);
+ puts ("swap contexts");
+ if (swapcontext (&ctx[3], &ctx[1]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ if (done != 1)
+ exit (EXIT_FAILURE);
+ done++;
+ puts ("set context");
+ if (setcontext (&ctx[4]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ exit (EXIT_FAILURE);
+}
+
+#include <support/test-driver.c>
new file mode 100644
@@ -0,0 +1,81 @@
+/* Check getcontext and setcontext on the context from makecontext.
+ Copyright (C) 2018 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 <stdio.h>
+#include <stdlib.h>
+#include <ucontext.h>
+#include <unistd.h>
+
+static ucontext_t ctx[3];
+static volatile int done;
+
+static void
+__attribute__((noinline, noclone))
+f2 (void)
+{
+ printf ("start f2\n");
+ done++;
+ if (setcontext (&ctx[2]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+}
+
+static void
+f1 (void)
+{
+ printf ("start f1\n");
+ if (getcontext (&ctx[2]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ if (done)
+ exit (EXIT_SUCCESS);
+ f2 ();
+}
+
+static int
+do_test (void)
+{
+ char st1[32768];
+ puts ("making contexts");
+ if (getcontext (&ctx[0]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ if (getcontext (&ctx[1]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ ctx[1].uc_stack.ss_sp = st1;
+ ctx[1].uc_stack.ss_size = sizeof st1;
+ ctx[1].uc_link = &ctx[0];
+ makecontext (&ctx[1], (void (*) (void)) f1, 0);
+ if (setcontext (&ctx[1]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ exit (EXIT_FAILURE);
+}
+
+#include <support/test-driver.c>
new file mode 100644
@@ -0,0 +1,100 @@
+/* Check setcontext on the context from makecontext.
+ Copyright (C) 2018 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 <stdio.h>
+#include <stdlib.h>
+#include <ucontext.h>
+#include <unistd.h>
+
+static ucontext_t ctx[5];
+static volatile int done;
+
+static void
+__attribute__((noinline, noclone))
+f2 (void)
+{
+ done++;
+ puts ("swap contexts in f2");
+ if (swapcontext (&ctx[4], &ctx[2]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ puts ("end f2");
+ exit (done == 2 ? EXIT_SUCCESS : EXIT_FAILURE);
+}
+
+static void
+f1 (void)
+{
+ puts ("start f1");
+ if (getcontext (&ctx[2]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ if (done)
+ {
+ puts ("set context in f1");
+ if (setcontext (&ctx[3]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ }
+ f2 ();
+}
+
+static int
+do_test (void)
+{
+ char st1[32768];
+ puts ("making contexts");
+ if (getcontext (&ctx[0]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ if (getcontext (&ctx[1]) != 0)
+ {
+ printf ("%s: getcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ ctx[1].uc_stack.ss_sp = st1;
+ ctx[1].uc_stack.ss_size = sizeof st1;
+ ctx[1].uc_link = &ctx[0];
+ makecontext (&ctx[1], (void (*) (void)) f1, 0);
+ puts ("swap contexts");
+ if (swapcontext (&ctx[3], &ctx[1]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ if (done != 1)
+ exit (EXIT_FAILURE);
+ done++;
+ puts ("set context");
+ if (setcontext (&ctx[4]) != 0)
+ {
+ printf ("%s: setcontext: %m\n", __FUNCTION__);
+ exit (EXIT_FAILURE);
+ }
+ exit (EXIT_FAILURE);
+}
+
+#include <support/test-driver.c>