Unity il2cpp Android 查看 Crash堆栈

在Firebas或者Bugly等一些崩溃日志，亦或者有一些android机器log中的crash日志，往往以一种堆栈的形式展现。

signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 000000706c74f3f0*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***Build fingerprint: 'google/redfin/redfin:11/RQ3A.211001.001/7641976:user/release-keys'Revision: 'MP1.0'pid: 32417, tid: 32500, name: UnityMain  >>> 
com.cyou.freestyle2.gp <<<    x0   b40000706c74f2e0  x1   0000000000103000  x2   0000000000000001  x3   000000706c2a9578    x4   000000706c2a9530  x5   0000000000000004  x6   622f737465737361  x7   617461442f6e6962    x8   0000000000000000  x9   0000007061ef4000  x10  0000000000004000  x11  0000000000007ef4    x12  000000000014afd0  x13  a428000000fc0100  x14  0000000000008000  x15  0000000000000001    x16  0000007061e50818  x17  00000073760f6d68  x18  000000706c2a9514  x19  b40000706c74f2e0    x20  0000000000000000  x21  b400007254699eb0  x22  000000706c2ab000  x23  b400007254699f68    x24  00000070c8981af8  x25  000000706c2ab000  x26  000000000000000b  x27  0000000000000001    x28  0000000000000000  x29  000000706c2a96b0  x30  0000007060fc3218    sp   000000706c2a9650  pc   0000007060fc7bd0  pstate 0000000060001000backtrace:  
#00  pc 000000000033ccd8  /data/app/~~WVNFp6HzpKWuierMUyvmig==/com.cyou.freestyle2.gp-L9mKcI-dGqrOh7aLnki7Wg==/split_config.arm64_v8a.apk!/lib/arm64-v8a/libunity.so    
#01  pc 0000000000361384  /data/app/~~WVNFp6HzpKWuierMUyvmig==/com.cyou.freestyle2.gp-L9mKcI-dGqrOh7aLnki7Wg==/split_config.arm64_v8a.apk!/lib/arm64-v8a/libunity.so    #02  pc 0000000000004db4  /system/bin/app_process64 #03  pc 00000000000005c0  [vdso] (__kernel_rt_sigreturn)    #04  pc 0000000000360bd0  /data/app/~~WVNFp6HzpKWuierMUyvmig==/com.cyou.freestyle2.gp-L9mKcI-dGqrOh7aLnki7Wg==/split_config.arm64_v8a.apk!/lib/arm64-v8a/libunity.so    #05  pc 000000000035c218  /data/app/~~WVNFp6HzpKWuierMUyvmig==/com.cyou.freestyle2.gp-L9mKcI-dGqrOh7aLnki7Wg==/split_config.arm64_v8a.apk!/lib/arm64-v8a/libunity.so    #06  pc 00000000000504f0  /data/app/~~WVNFp6HzpKWuierMUyvmig==/com.cyou.freestyle2.gp-L9mKcI-dGqrOh7aLnki7Wg==/oat/arm64/base.odex

查看这种堆栈的具体信息就需要用到符号表。

• NDK：E:\NDK\android-ndk-r13b-windows-x86_64\android-ndk-r13b\toolchains\aarch64-linux-android-4.9\prebuilt\windows-x86_64\bin\aarch64-linux-android-addr2line.exe
• SO："D:\Unity 2017.4.40\Unity\Editor\Data\PlaybackEngines\AndroidPlayer\Variations\il2cpp\Release\Symbols\arm64-v8a\libunity.sym.so"
• Address：000000000033ccd8 0000000000361384 ...

{NDK} -f -C -e {SO} {Address}

输出结果：

unwind_backtrace_signal_arch(siginfo*, void*, map_info const*, backtrace_frame_t*, unsigned long, unsigned long)
??:?
NativeRuntimeException::signal_handler(int, siginfo*, void*)
??:?
??
??:0
??
??:0
NativeRuntimeException::CatchAndRethrow()
??:?
nativeDone(_JNIEnv*, _jobject*)
??:?
??
??:0

就能查看一些具体信息，但是也只能到c++层。 有一点用，但是用处不大，很难定位到具体的unity代码和行数。