我正在为iOS建立自己的信号和未捕获的异常处理程序.为了做到这一点,我使用这两个功能：
NSSetUncaughtExceptionHandler(/*handler*/);
和
signal(/*signal const*/,/*signal handler*/);
我的问题是我无法使用EXC_BAD_ACCESS信号.是否有一些信号常数(如SIGABRT,SIGBUS)捕获EXC_BAD_ACCESS？如果没有,我该怎么处理？一些崩溃分析工具(lika PLCrashReporter,Crashlytics等)可以跟踪它…
解决方法
EXC_BAD_ACCESS不生成异常,因此您的第一个函数不适用于该情况.它产生信号SIGSEGV或SIGBUS.
请参阅可可与爱的Handling unhandled exceptions and signals.
更新
我刚刚检查了LLDB的源代码.它可能是TARGET_EXC_BAD_ACCESS = 0x91.
在RNBRemote.h中：
/* We translate the /usr/include/mach/exception_types.h exception types (e.g. EXC_BAD_ACCESS) to the fake BSD signal numbers that gdb uses in include/gdb/signals.h (e.g. TARGET_EXC_BAD_ACCESS). These hard coded values for TARGET_EXC_BAD_ACCESS et al must match the gdb values in its include/gdb/signals.h. */ #define TARGET_EXC_BAD_ACCESS 0x91 #define TARGET_EXC_BAD_INSTRUCTION 0x92 #define TARGET_EXC_ARITHMETIC 0x93 #define TARGET_EXC_EMULATION 0x94 #define TARGET_EXC_SOFTWARE 0x95 #define TARGET_EXC_BREAKPOINT 0x96
并在RNBRemote.cpp中：
// Translate any mach exceptions to gdb versions,unless they are
// common exceptions like a breakpoint or a soft signal.
switch (tid_stop_info.details.exception.type)
{
default: signum = 0; break;
case EXC_BREAKPOINT: signum = SIGTRAP; break;
case EXC_BAD_ACCESS: signum = TARGET_EXC_BAD_ACCESS; break;
case EXC_BAD_INSTRUCTION: signum = TARGET_EXC_BAD_INSTRUCTION; break;
case EXC_ARITHMETIC: signum = TARGET_EXC_ARITHMETIC; break;
case EXC_EMULATION: signum = TARGET_EXC_EMULATION; break;
case EXC_SOFTWARE:
if (tid_stop_info.details.exception.data_count == 2 &&
tid_stop_info.details.exception.data[0] == EXC_SOFT_SIGNAL)
signum = tid_stop_info.details.exception.data[1];
else
signum = TARGET_EXC_SOFTWARE;
break;
}
