| 1 | /* Test lazy binding during dlclose (bug 30425). |
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| 2 | Copyright (C) 2023-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | /* This test re-creates a situation that can arise naturally for C++ |
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| 20 | applications due to the use of vague linkage and differences in the |
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| 21 | set of compiler-emitted functions. A function in |
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| 22 | tst-dlclose-lazy-mod1.so (exported_function) interposes a function |
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| 23 | in tst-dlclose-lazy-mod2.so. This function is called from the |
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| 24 | destructor in tst-dlclose-lazy-mod2.so, after the destructor for |
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| 25 | tst-dlclose-lazy-mod1.so has already completed. Prior to the fix |
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| 26 | for bug 30425, this would lead to a lazy binding failure in |
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| 27 | tst-dlclose-lazy-mod1.so because dlclose had already marked the DSO |
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| 28 | as unavailable for binding (by setting l_removed). */ |
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| 29 | |
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| 30 | #include <dlfcn.h> |
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| 31 | #include <support/xdlfcn.h> |
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| 32 | #include <support/check.h> |
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| 33 | |
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| 34 | int |
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| 35 | main (void) |
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| 36 | { |
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| 37 | /* Load tst-dlclose-lazy-mod1.so, indirectly loading |
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| 38 | tst-dlclose-lazy-mod2.so. */ |
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| 39 | void *handle = xdlopen (filename: "tst-dlclose-lazy-mod1.so" , RTLD_GLOBAL | RTLD_LAZY); |
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| 40 | |
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| 41 | /* Invoke the destructor of tst-dlclose-lazy-mod2.so, which calls |
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| 42 | into tst-dlclose-lazy-mod1.so after its destructor has been |
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| 43 | called. */ |
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| 44 | xdlclose (handle); |
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| 45 | |
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| 46 | return 0; |
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| 47 | } |
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| 48 | |
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