Question

我用C代码调试我的Android项目，logcat消息显示：

I/DEBUG   (13509): backtrace:
I/DEBUG   (13509):     #00  pc 000106dc  /system/lib/libc.so (dlmalloc+1463)
I/DEBUG   (13509):     #01  pc 0000cf3f  /system/lib/libc.so (malloc+10)
I/DEBUG   (13509):     #02  pc 00011d0d  /system/lib/libutils.so (android::SharedBuffer::alloc(unsigned int)+8)
I/DEBUG   (13509):     #03  pc 00014cf7  /system/lib/libutils.so (android::VectorImpl::setCapacity(unsigned int)+22)
I/DEBUG   (13509):     #04  pc 0007fd79  /system/lib/libandroid_runtime.so (android::TextLayoutValue::TextLayoutValue(unsigned int)+108)
I/DEBUG   (13509):     #05  pc 000811a9  /system/lib/libandroid_runtime.so (android::TextLayoutCache::getValue(SkPaint const*, unsigned short const*, int, int, int, int)+184)
I/DEBUG   (13509):     #06  pc 00081589  /system/lib/libandroid_runtime.so (android::TextLayoutEngine::getValue(SkPaint const*, unsigned short const*, int, int, int, int)+36)
I/DEBUG   (13509):     #07  pc 0007f799  /system/lib/libandroid_runtime.so (android::TextLayout::getTextRunAdvances(SkPaint*, unsigned short const*, int, int, int, int, float*, float*)+42)
I/DEBUG   (13509):     #08  pc 0007c60d  /system/lib/libandroid_runtime.so
I/DEBUG   (13509):     #09  pc 0007c7f9  /system/lib/libandroid_runtime.so
I/DEBUG   (13509):     #10  pc 0001e690  /system/lib/libdvm.so (dvmPlatformInvoke+112)
I/DEBUG   (13509):     #11  pc 0005100f  /system/lib/libdvm.so (dvmCallJNIMethod(unsigned int const*, JValue*, Method const*, Thread*)+426)
I/DEBUG   (13509):     #12  pc 00027aa0  /system/lib/libdvm.so
I/DEBUG   (13509):     #13  pc 0002ce84  /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+232)
I/DEBUG   (13509):     #14  pc 000674bf  /system/lib/libdvm.so (dvmInvokeMethod(Object*, Method const*, ArrayObject*, ArrayObject*, ClassObject*, bool)+374)
I/DEBUG   (13509):     #15  pc 0007066f  /system/lib/libdvm.so
I/DEBUG   (13509):     #16  pc 00027aa0  /system/lib/libdvm.so
I/DEBUG   (13509):     #17  pc 0002ce84  /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+232)
I/DEBUG   (13509):     #18  pc 000671a1  /system/lib/libdvm.so (dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)+272)
I/DEBUG   (13509):     #19  pc 0004d2d7  /system/lib/libdvm.so
I/DEBUG   (13509):     #20  pc 0004d391  /system/lib/libandroid_runtime.so
I/DEBUG   (13509):     #21  pc 0004e22d  /system/lib/libandroid_runtime.so (android::AndroidRuntime::start(char const*, char const*)+540)
I/DEBUG   (13509):     #22  pc 00000e67  /system/bin/app_process
I/DEBUG   (13509):     #23  pc 000128b3  /system/lib/libc.so (__libc_init+38)
I/DEBUG   (13509):     #24  pc 00000b74  /system/bin/app_process

消息告诉我问题是malloc，似乎这个bug来自libandroid_runtim。

如何知道我项目中的问题？因为该消息不显示我的代码位置，所以包括java和c。

请帮助我解决这个问题。这让我很烦。非常感谢。

Answer 1

你有一个NULL取消引用（这是0x00000000指示的）。因为它在malloc中，这可能意味着你通过在信号之前的某个时间写入malloc的返回区域来破坏内存分配器的内部结构。我建议使用valgrind来检测那个确切的点，我认为它可以在Android上用一些功夫。

来自logcat debuging的0x00000000（code = 1）处的致命信号11（SIGSEGV）

1 个答案: