| // Copyright (C) 2012 The Android Open Source Project |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions |
| // are met: |
| // 1. Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // 2. Redistributions in binary form must reproduce the above copyright |
| // notice, this list of conditions and the following disclaimer in the |
| // documentation and/or other materials provided with the distribution. |
| // 3. Neither the name of the project nor the names of its contributors |
| // may be used to endorse or promote products derived from this software |
| // without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| // ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| // OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| // SUCH DAMAGE. |
| |
| #include <android/log.h> |
| #include <dlfcn.h> |
| #include <stdio.h> |
| |
| #include "cxxabi_defines.h" |
| |
| namespace __gabixx { |
| |
| _GABIXX_NORETURN void __fatal_error(const char* message) { |
| |
| // Note: Printing to stderr is only useful when running an executable |
| // from a shell, e.g. when using 'adb shell'. For regular |
| // applications, stderr is redirected to /dev/null by default. |
| fprintf(stderr, "PANIC:GAbi++:%s\n", message); |
| |
| // Always print the message to the log, when possible. Use |
| // dlopen()/dlsym() to avoid adding an explicit dependency |
| // to -llog in GAbi++ for this sole feature. |
| // |
| // An explicit dependency to -ldl can be avoided because these |
| // functions are implemented directly by the dynamic linker. |
| // That is, except when this code is linked into a static |
| // executable. In this case, adding -ldl to the final link command |
| // will be necessary, but the dlopen() will always return NULL. |
| // |
| // There is unfortunately no way to detect where this code is going |
| // to be used at compile time, but static executables are strongly |
| // discouraged on the platform because they can't implement ASLR. |
| // |
| typedef void (*logfunc_t)(int, const char*, const char*); |
| logfunc_t logger = NULL; |
| |
| // Note that this should always succeed in a regular application, |
| // because the library is already loaded into the process' address |
| // space by Zygote before forking the application process. |
| // This will fail in static executables, because the static |
| // version of -ldl only contains empty stubs. |
| void* liblog = dlopen("liblog.so", RTLD_NOW); |
| |
| if (liblog != NULL) { |
| logger = reinterpret_cast<logfunc_t>(dlsym(liblog, "__android_log_print")); |
| if (logger != NULL) { |
| (*logger)(ANDROID_LOG_FATAL, "GAbi++", message); |
| } |
| dlclose(liblog); |
| } |
| |
| std::terminate(); |
| } |
| |
| } // namespace __gabixx |