stl字符串赋值NDK崩溃

Question

我的代码在这里崩溃：

void setText(const string & s) 
{ 
    needsReload = true; 
    _text = s; //<-- SIGSEGV here
}

_text是std：：字符串

这完全没有意义。this、_text和s在有效内存中。我不能尝试portstl，因为我需要异常。根本没有什么会出错的。我目前正在为armeabi-v7a编译。有什么建议吗？

经过更多的处理后，我发现每当我将一些东西赋给一个事先是空字符串的字符串时，它就会崩溃。我想这跟我的libstdc++有关。以下是我的编译和链接标志：

[ 50%] Building CXX object CMakeFiles/Mathrix.dir/main.cpp.o
/opt/android-ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi-g++   -DMathrix_EXPORTS -DANDROID -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ --sysroot=/opt/android-ndk/platforms/android-9/arch-arm -fsigned-char -march=armv7-a -mfloat-abi=softfp -mfpu=vfp -fdata-sections -ffunction-sections -fPIC -Wno-psabi -frtti -fexceptions -marm -Os -finline-limit=64 -fno-strict-aliasing -fno-omit-frame-pointer -DDEBUG -D_DEBUG -DDEBUG -fPIC -isystem /opt/android-ndk/platforms/android-9/arch-arm/usr/include -isystem /opt/android-ndk/sources/cxx-stl/gnu-libstdc++/4.6/include -isystem /opt/android-ndk/sources/cxx-stl/gnu-libstdc++/4.6/libs/armeabi-v7a/include -I/home/da_petcu21/src/Porkholt/Examples/Mathrix/../../Engine/include -I/home/da_petcu21/src/Porkholt/Examples/Mathrix/../../Engine/../Externals/lua/src -I/home/da_petcu21/src/Porkholt/Examples/Mathrix/../../Engine/../Externals/libpng -I/home/da_petcu21/src/Porkholt/Examples/Mathrix/../../Engine/../Externals/zlib -I/home/da_petcu21/src/Porkholt/Examples/Mathrix/../../Engine/../Externals/uremote/include -I/home/da_petcu21/src/Porkholt/Examples/Mathrix/../../Engine/../Externals/openal-soft/include    -o CMakeFiles/Mathrix.dir/main.cpp.o -c /home/da_petcu21/src/Porkholt/Examples/Mathrix/main.cpp
Linking CXX shared library ../libs/armeabi-v7a/libMathrix.so
/usr/bin/cmake -E cmake_link_script CMakeFiles/Mathrix.dir/link.txt --verbose=Yes
/opt/android-ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi-g++  -fPIC --sysroot=/opt/android-ndk/platforms/android-9/arch-arm -fsigned-char -march=armv7-a -mfloat-abi=softfp -mfpu=vfp -fdata-sections -ffunction-sections -fPIC -Wno-psabi -frtti -fexceptions -marm -Os -finline-limit=64 -fno-strict-aliasing -fno-omit-frame-pointer -DDEBUG -D_DEBUG -DDEBUG -Wl,--fix-cortex-a8 -Wl,--gc-sections -Wl,--no-undefined   -shared -Wl,-soname,libMathrix.so -o ../libs/armeabi-v7a/libMathrix.so CMakeFiles/Mathrix.dir/main.cpp.o -L/opt/android-ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/user/libs/armeabi-v7a -L/home/da_petcu21/src/Porkholt/Examples/Mathrix/build-android/armeabi-v7a/CMakeFiles/ndklibs/armeabi-v7a -L/home/da_petcu21/src/Porkholt/Examples/Mathrix/build-android/libs/armeabi-v7a -lPorkholt -llua -Wl,-rpath,/opt/android-ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/user/libs/armeabi-v7a:/home/da_petcu21/src/Porkholt/Examples/Mathrix/build-android/armeabi-v7a/CMakeFiles/ndklibs/armeabi-v7a:/home/da_petcu21/src/Porkholt/Examples/Mathrix/build-android/libs/armeabi-v7a 

我正在使用的构建脚本将libgnustl_static复制到/home/da_petcu21/src/Porkholt/Examples/Mathrix/build-android/armeabi-v7a/CMakeFiles/ndklibs/armeabi-v7a/libstdc++.a

我怀疑它使用的是/opt/android-ndk/platforms/android-9/arm/lib中的那个

Answer 1

问题是stl静态地链接到我的每个库，因此创建了它需要共享的某些全局变量的副本。(查看Can't load native shared library with dependencies in a native activity app查看我的apk的库布局)。

为了便于将来参考，这里有一个很好的解释来解释为什么会发生这种情况：http://www.trilithium.com/johan/2005/06/static-libstdc/

我设法通过简单地动态链接stl解决了这个问题。