diff options
Diffstat (limited to 'stdlib')
| -rw-r--r-- | stdlib/Makefile | 3 | ||||
| -rw-r--r-- | stdlib/tst-swapcontext1.c | 108 |
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> |