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2005-01-21 Jakub Jelinek <jakub@redhat.com>
[BZ #735] * elf/Makefile: Add rules to build and run tst-align2. * elf/tst-align2.c: New test. * elf/tst-alignmod2.c: New file. * sysdeps/powerpc/tst-stack-align.h: New file. * sysdeps/i386/dl-machine.h (RTLD_START): Align stack and clear frame pointer before calling _dl_init. * sysdeps/x86_64/dl-machine.h (RTLD_START): Likewise.
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Roland McGrath
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Feb 16, 2005
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,157 @@ | ||
| /* Copyright (C) 2005 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, write to the Free | ||
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | ||
| 02111-1307 USA. */ | ||
|
|
||
| #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; | ||
|
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| extern void in_dso (int *, bool *, int *); | ||
|
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||
| 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; | ||
| } | ||
|
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| in_dso (&result, &test_destructors, &fds[1]); | ||
|
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| if (pipe (fds) < 0) | ||
| { | ||
| printf ("couldn't create pipe: %m\n"); | ||
| return 1; | ||
| } | ||
|
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||
| pid_t pid = fork (); | ||
| if (pid < 0) | ||
| { | ||
| printf ("fork failed: %m\n"); | ||
| return 1; | ||
| } | ||
|
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||
| if (!pid) | ||
| { | ||
| close (fds[0]); | ||
| test_destructors = true; | ||
| exit (0); | ||
| } | ||
|
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| close (fds[1]); | ||
|
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| 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; | ||
| } | ||
| } | ||
|
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| close (fds[0]); | ||
|
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| if (des_seen != 1) | ||
| { | ||
| printf ("binary destructor run %d times instead of once\n", des_seen); | ||
| result = 1; | ||
| } | ||
|
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||
| if (dso_des_seen != 1) | ||
| { | ||
| printf ("DSO destructor run %d times instead of once\n", dso_des_seen); | ||
| result = 1; | ||
| } | ||
|
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| 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; | ||
| } | ||
|
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| return result; | ||
| } | ||
|
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| #define TEST_FUNCTION do_test () | ||
| #include "../test-skeleton.c" |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| /* Copyright (C) 2003, 2005 Free Software Foundation, Inc. | ||
| This file is part of the GNU C Library. | ||
| Contributed by Jakub Jelinek <jakub@redhat.com>, 2003. | ||
| 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, write to the Free | ||
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | ||
| 02111-1307 USA. */ | ||
|
|
||
| #include <stdbool.h> | ||
| #include <stdio.h> | ||
| #include <tst-stack-align.h> | ||
| #include <unistd.h> | ||
|
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| static int res, *fdp; | ||
| static bool *test_destructorsp; | ||
|
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| static void __attribute__((constructor)) | ||
| con (void) | ||
| { | ||
| res = TEST_STACK_ALIGN () ? -1 : 1; | ||
| } | ||
|
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||
| void | ||
| in_dso (int *result, bool *test_destructors, int *fd) | ||
| { | ||
| if (!res) | ||
| { | ||
| puts ("constructor has not been run"); | ||
| *result = 1; | ||
| } | ||
| else if (res != 1) | ||
| { | ||
| puts ("constructor has been run without sufficient alignment"); | ||
| *result = 1; | ||
| } | ||
|
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| test_destructorsp = test_destructors; | ||
| fdp = fd; | ||
| } | ||
|
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| static void __attribute__((destructor)) | ||
| des (void) | ||
| { | ||
| if (!test_destructorsp || !*test_destructorsp) | ||
| return; | ||
|
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||
| char c = TEST_STACK_ALIGN () ? 'D' : 'C'; | ||
| write (*fdp, &c, 1); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| /* Copyright (C) 2005 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, write to the Free | ||
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | ||
| 02111-1307 USA. */ | ||
|
|
||
| #include <stdio.h> | ||
| #include <stdint.h> | ||
|
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| #define TEST_STACK_ALIGN() \ | ||
| ({ \ | ||
| /* Altivec __vector int etc. needs 16byte aligned stack. \ | ||
| Instead of using altivec.h here, use aligned attribute instead. */ \ | ||
| struct _S \ | ||
| { \ | ||
| int _i __attribute__((aligned (16))); \ | ||
| int _j[3]; \ | ||
| } _s = { ._i = 18, ._j[0] = 19, ._j[1] = 20, ._j[2] = 21 }; \ | ||
| double _d = 12.0; \ | ||
| long double _ld = 15.0; \ | ||
| int _ret = 0; \ | ||
| printf ("__vector int: { %d, %d, %d, %d } %p %zu\n", _s._i, _s._j[0], \ | ||
| _s._j[1], _s._j[2], &_s, __alignof (_s)); \ | ||
| if ((((uintptr_t) &_s) & (__alignof (_s) - 1)) != 0) \ | ||
| _ret = 1; \ | ||
| \ | ||
| printf ("double: %g %p %zu\n", _d, &_d, __alignof (double)); \ | ||
| if ((((uintptr_t) &_d) & (__alignof (double) - 1)) != 0) \ | ||
| _ret = 1; \ | ||
| \ | ||
| printf ("ldouble: %Lg %p %zu\n", _ld, &_ld, __alignof (long double)); \ | ||
| if ((((uintptr_t) &_ld) & (__alignof (long double) - 1)) != 0) \ | ||
| _ret = 1; \ | ||
| _ret; \ | ||
| }) |
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