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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/elf/tst-align2.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.xz glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization. zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
Diffstat (limited to 'REORG.TODO/elf/tst-align2.c')
-rw-r--r-- | REORG.TODO/elf/tst-align2.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/REORG.TODO/elf/tst-align2.c b/REORG.TODO/elf/tst-align2.c new file mode 100644 index 0000000000..78b66be20a --- /dev/null +++ b/REORG.TODO/elf/tst-align2.c @@ -0,0 +1,155 @@ +/* Copyright (C) 2005-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek <jakub@redhat.com>, 2005. + + 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 <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/wait.h> +#include <tst-stack-align.h> +#include <unistd.h> + +static int res, fds[2], result; +static bool test_destructors; + +extern void in_dso (int *, bool *, int *); + +static void __attribute__ ((constructor)) con (void) +{ + res = TEST_STACK_ALIGN () ? -1 : 1; +} + +static void __attribute__ ((destructor)) des (void) +{ + if (!test_destructors) + return; + + char c = TEST_STACK_ALIGN () ? 'B' : 'A'; + write (fds[1], &c, 1); +} + +static int +do_test (void) +{ + if (!res) + { + puts ("binary's constructor has not been run"); + result = 1; + } + else if (res != 1) + { + puts ("binary's constructor has been run without sufficient alignment"); + result = 1; + } + + if (TEST_STACK_ALIGN ()) + { + puts ("insufficient stack alignment in do_test"); + result = 1; + } + + in_dso (&result, &test_destructors, &fds[1]); + + if (pipe (fds) < 0) + { + printf ("couldn't create pipe: %m\n"); + return 1; + } + + pid_t pid = fork (); + if (pid < 0) + { + printf ("fork failed: %m\n"); + return 1; + } + + if (!pid) + { + close (fds[0]); + test_destructors = true; + exit (0); + } + + close (fds[1]); + + unsigned char c; + ssize_t len; + int des_seen = 0, dso_des_seen = 0; + while ((len = TEMP_FAILURE_RETRY (read (fds[0], &c, 1))) > 0) + { + switch (c) + { + case 'B': + puts ("insufficient alignment in binary's destructor"); + result = 1; + /* FALLTHROUGH */ + case 'A': + des_seen++; + break; + case 'D': + puts ("insufficient alignment in DSO destructor"); + result = 1; + /* FALLTHROUGH */ + case 'C': + dso_des_seen++; + break; + default: + printf ("unexpected character %x read from pipe", c); + result = 1; + break; + } + } + + close (fds[0]); + + if (des_seen != 1) + { + printf ("binary destructor run %d times instead of once\n", des_seen); + result = 1; + } + + if (dso_des_seen != 1) + { + printf ("DSO destructor run %d times instead of once\n", dso_des_seen); + result = 1; + } + + int status; + pid_t termpid; + termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)); + if (termpid == -1) + { + printf ("waitpid failed: %m\n"); + result = 1; + } + else if (termpid != pid) + { + printf ("waitpid returned %ld != %ld\n", + (long int) termpid, (long int) pid); + result = 1; + } + else if (!WIFEXITED (status) || WEXITSTATUS (status)) + { + puts ("child hasn't exited with exit status 0"); + result = 1; + } + + return result; +} + +#include <support/test-driver.c> |