ndk/tests/device/test-libc++/jni/test_1.cc

   1 // -*- C++ -*-
   2 //===-------------------- support/android/wchar_support.c ------------------===//
   3 //
   4 //                     The LLVM Compiler Infrastructure
   5 //
   6 // This file is dual licensed under the MIT and the University of Illinois Open
   7 // Source Licenses. See LICENSE.TXT for details.
   8 //
   9 //===----------------------------------------------------------------------===//
  10
  11 #include <iostream>
  12 #include <locale>
  13
  14 int main(void) {
  15   // TODO(digit): This imbue is required, otherwise a crash will happen
  16   // at runtime, with the following stack trace:
  17   //
  18   //   #0  0x00069ae0 in std::(anonymous namespace)::default_terminate () at jni/../../../../gabi++/src/terminate.cc:57
  19   //   #1  0x00069e48 in std::terminate () at jni/../../../../gabi++/src/terminate.cc:123
  20   //   #2  0x00067d44 in __cxxabiv1::call_terminate (unwind_exception=0x1827470) at jni/../../../../gabi++/src/helper_func_internal.cc:58
  21   //   #3  0x00066bf8 in (anonymous namespace)::throwException (header=0x1827438) at jni/../../../../gabi++/src/cxxabi.cc:126
  22   //   #4  0x00066e64 in __cxxabiv1::__cxa_throw (thrown_exc=0x18274c8, tinfo=0x7fa00, dest=0x69c10 <std::bad_cast::~bad_cast()>)
  23   //       at jni/../../../../gabi++/src/cxxabi.cc:190
  24   //   #5  0x00010be0 in std::__1::locale::__imp::use_facet (this=0x80b28, id=28) at jni/../../../libcxx/src/locale.cpp:426
  25   //   #6  0x00010f50 in std::__1::locale::use_facet (this=0xbe980ab4, x=...) at jni/../../../libcxx/src/locale.cpp:568
  26   //   #7  0x00009e88 in use_facet<std::__1::ctype<char> > (__l=<optimized out>) at jni/../../../libcxx/include/__locale:172
  27   //   #8  widen (__c=10 '\n', this=0x80084) at jni/../../../libcxx/include/ios:726
  28   //   #9  std::__1::endl<char, std::__1::char_traits<char> > (__os=...) at jni/../../../libcxx/include/ostream:1181
  29   //   #10 0x00009ad0 in operator<< (
  30   //   __pf=0x9e20 <std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&)>, this=0x80080) at jni/../../../libcxx/include/ostream:306
  31   //   #11 main () at jni/test_1.cc:22
  32   //
  33   // The issue seems to be that on #9, the id retrieved through
  34   // locale::id::__get() reaches 28, which is an invalid index in the
  35   // facets_ vector defined in locale.cpp:124 and populated in
  36   // locale::__imp::__imp(size_t) in the same source file.
  37   //
  38   // Not sure if a libc++ bug or something else. Investigate.
  39   std::cout.imbue(std::locale("C"));
  40   std::cout << "Hello World" << std::endl;
  41   return 0;
  42 }