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-rw-r--r--stdlib/Makefile3
-rw-r--r--stdlib/tst-swapcontext1.c108
2 files changed, 110 insertions, 1 deletions
diff --git a/stdlib/Makefile b/stdlib/Makefile
index b5e55b0a55..bc8929f2b9 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -84,7 +84,8 @@ tests := tst-strtol tst-strtod testmb testrand testsort testdiv \
tst-cxa_atexit tst-on_exit test-atexit-race \
test-at_quick_exit-race test-cxa_atexit-race \
test-on_exit-race test-dlclose-exit-race \
- tst-makecontext-align test-bz22786 tst-strtod-nan-sign
+ tst-makecontext-align test-bz22786 tst-strtod-nan-sign \
+ tst-swapcontext1
tests-internal := tst-strtod1i tst-strtod3 tst-strtod4 tst-strtod5i \
tst-tls-atexit tst-tls-atexit-nodelete
diff --git a/stdlib/tst-swapcontext1.c b/stdlib/tst-swapcontext1.c
new file mode 100644
index 0000000000..7802df4868
--- /dev/null
+++ b/stdlib/tst-swapcontext1.c
@@ -0,0 +1,108 @@
+/* Check multiple makecontext calls.
+ 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>
+
+static ucontext_t uctx_main, uctx_func1, uctx_func2;
+const char *str1 = "\e[31mswapcontext(&uctx_func1, &uctx_main)\e[0m";
+const char *str2 = "\e[34mswapcontext(&uctx_func2, &uctx_main)\e[0m";
+const char *fmt1 = "\e[31m";
+const char *fmt2 = "\e[34m";
+
+#define handle_error(msg) \
+ do { perror(msg); exit(EXIT_FAILURE); } while (0)
+
+__attribute__((noinline, noclone))
+static void
+func4(ucontext_t *uocp, ucontext_t *ucp, const char *str, const char *fmt)
+{
+ printf(" %sfunc4: %s\e[0m\n", fmt, str);
+ if (swapcontext(uocp, ucp) == -1)
+ handle_error("swapcontext");
+ printf(" %sfunc4: returning\e[0m\n", fmt);
+}
+
+__attribute__((noinline, noclone))
+static void
+func3(ucontext_t *uocp, ucontext_t *ucp, const char *str, const char *fmt)
+{
+ printf(" %sfunc3: func4(uocp, ucp, str)\e[0m\n", fmt);
+ func4(uocp, ucp, str, fmt);
+ printf(" %sfunc3: returning\e[0m\n", fmt);
+}
+
+__attribute__((noinline, noclone))
+static void
+func1(void)
+{
+ while ( 1 )
+ {
+ printf(" \e[31mfunc1: func3(&uctx_func1, &uctx_main, str1)\e[0m\n");
+ func3( &uctx_func1, &uctx_main, str1, fmt1);
+ }
+}
+
+__attribute__((noinline, noclone))
+static void
+func2(void)
+{
+ while ( 1 )
+ {
+ printf(" \e[34mfunc2: func3(&uctx_func2, &uctx_main, str2)\e[0m\n");
+ func3(&uctx_func2, &uctx_main, str2, fmt2);
+ }
+}
+
+static int
+do_test (void)
+{
+ char func1_stack[16384];
+ char func2_stack[16384];
+ int i;
+
+ if (getcontext(&uctx_func1) == -1)
+ handle_error("getcontext");
+ uctx_func1.uc_stack.ss_sp = func1_stack;
+ uctx_func1.uc_stack.ss_size = sizeof(func1_stack);
+ uctx_func1.uc_link = &uctx_main;
+ makecontext(&uctx_func1, func1, 0);
+
+ if (getcontext(&uctx_func2) == -1)
+ handle_error("getcontext");
+ uctx_func2.uc_stack.ss_sp = func2_stack;
+ uctx_func2.uc_stack.ss_size = sizeof(func2_stack);
+ uctx_func2.uc_link = &uctx_func1;
+ makecontext(&uctx_func2, func2, 0);
+
+ for ( i = 0; i < 4; i++ )
+ {
+ if (swapcontext(&uctx_main, &uctx_func1) == -1)
+ handle_error("swapcontext");
+ printf(" \e[35mmain: swapcontext(&uctx_main, &uctx_func2)\n\e[0m");
+ if (swapcontext(&uctx_main, &uctx_func2) == -1)
+ handle_error("swapcontext");
+ printf(" \e[35mmain: swapcontext(&uctx_main, &uctx_func1)\n\e[0m");
+ }
+
+ printf("main: exiting\n");
+ exit(EXIT_SUCCESS);
+}
+
+#include <support/test-driver.c>