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| 1 /* | |
| 2 * libjingle | |
| 3 * Copyright 2004 Google Inc. | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright notice, | |
| 9 * this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 11 * this list of conditions and the following disclaimer in the documentation | |
| 12 * and/or other materials provided with the distribution. | |
| 13 * 3. The name of the author may not be used to endorse or promote products | |
| 14 * derived from this software without specific prior written permission. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
| 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
| 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
| 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
| 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
| 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
| 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #include "talk/media/devices/libudevsymboltable.h" | |
| 29 | |
| 30 #include <dlfcn.h> | |
| 31 | |
| 32 #include "webrtc/base/logging.h" | |
| 33 | |
| 34 namespace cricket { | |
| 35 | |
| 36 #define LATE_BINDING_SYMBOL_TABLE_CLASS_NAME LIBUDEV_SYMBOLS_CLASS_NAME | |
| 37 #define LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST LIBUDEV_SYMBOLS_LIST | |
| 38 #define LATE_BINDING_SYMBOL_TABLE_DLL_NAME "libudev.so.0" | |
| 39 #include "webrtc/base/latebindingsymboltable.cc.def" | |
| 40 #undef LATE_BINDING_SYMBOL_TABLE_CLASS_NAME | |
| 41 #undef LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST | |
| 42 #undef LATE_BINDING_SYMBOL_TABLE_DLL_NAME | |
| 43 | |
| 44 bool IsWrongLibUDevAbiVersion(rtc::DllHandle libudev_0) { | |
| 45 rtc::DllHandle libudev_1 = dlopen("libudev.so.1", | |
| 46 RTLD_NOW|RTLD_LOCAL|RTLD_NOLOAD); | |
| 47 bool unsafe_symlink = (libudev_0 == libudev_1); | |
| 48 if (unsafe_symlink) { | |
| 49 // .0 and .1 are distinct ABIs, so if they point to the same thing then one | |
| 50 // of them must be wrong. Probably the old has been symlinked to the new in | |
| 51 // a misguided attempt at backwards compatibility. | |
| 52 LOG(LS_ERROR) << "libudev.so.0 and libudev.so.1 unsafely point to the" | |
| 53 " same thing; not using libudev"; | |
| 54 } else if (libudev_1) { | |
| 55 // If libudev.so.1 is resident but distinct from libudev.so.0, then some | |
| 56 // system library loaded the new ABI separately. This is not a problem for | |
| 57 // LateBindingSymbolTable because its symbol look-ups are restricted to its | |
| 58 // DllHandle, but having libudev.so.0 resident may cause problems for that | |
| 59 // system library because symbol names are not namespaced by DLL. (Although | |
| 60 // our use of RTLD_LOCAL should avoid most problems.) | |
| 61 LOG(LS_WARNING) | |
| 62 << "libudev.so.1 is resident but distinct from libudev.so.0"; | |
| 63 } | |
| 64 if (libudev_1) { | |
| 65 // Release the refcount that we acquired above. (Does not unload the DLL; | |
| 66 // whoever loaded it still needs it.) | |
| 67 dlclose(libudev_1); | |
| 68 } | |
| 69 return unsafe_symlink; | |
| 70 } | |
| 71 | |
| 72 } // namespace cricket | |
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Chromium Code Reviews
Issue 1587193006:
Move talk/media to webrtc/media (Closed)
Base URL: https://chromium.googlesource.com/external/webrtc.git@master