CODEWITHSUNDEEP
javaandroidcandroid-ndkandroid-logcat
Jar
Jar

Reputation: 185

Fatal signal 11 (SIGSEGV) at 0x00000000 (code=1) from logcat debuging

I'm debugging my Android project with C code, the logcat message shows that:

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

The message tell me the problem is malloc, it seems the bug is from libandroid_runtim.

How to know what is the problem in my project? Because the message show nothing about my code location, includes java and c.

Please kindly help me to fix this problem. It's bother me for a long time. Thanks very much.

Upvotes: 0

Views: 2625

Answers (1)

Tassos Bassoukos
Tassos Bassoukos

Reputation: 16152

You got a NULL dereference (that's what the 0x00000000 indicates). Since it's in malloc, that probably means that you corrupted the memory allocator's internal structures by writing outside malloc's returned area at some time before the signal. I would suggest using valgrind to detect that exact point, I think it's usable on Android with some effort.

Upvotes: 1

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