“LLDB crash”

I have a multithreaded application that uses popen() for system calls. Here is the snippet. I crashes in popen() (line 2 below). 1 fp = NULL; 2 if ((fp = popen(dnsCommand, r)) == NULL) { 3 logPrint(errno, *executeDNS: popen failed. Exiting...); 4 exitProcess(__func__, __LINE__); } I caught this under xcode debug and under cli lldb. To replicate it I have to let it run for several hours, and this functions is called repeatedly during that time. I can't really tell the exact conditions that cause the crash. The error messages is Thread 43: EXC_BAD_ACCESS (code=1, address=0x3010000080e) In this case dnsCommand is dnsCommand char [200] /Applications/NetBeez/bin/dig +noall +search +stats +comments xfinity.com 2>/dev/null Here is the backtrace (lldb) bt * thread #43, stop reason = EXC_BAD_ACCESS (code=1, address=0x3010000080e) * frame #0: 0x00007ff803997d22 libsystem_c.dylib`popen + 478 frame #1: 0x000000010004b53e nbagentgdb`executeDNS(param=0x0000000128900000) at executeDNS.

The instruction pointer jumps all over the place when single-stepping through iOS Objective-C code on M1 hardware (Big Sur 11.2, Xcode 12.4). I tested on an M1 MacBook Air and an M1 MacMini and get the same behavior (running my app on a simulator or iPad hardware). All compiler, linker, etc. optimizations (that I know about) are turned off. Anyone else having this problem? Anyone have a work-around?

I am building an MPI C project in Xcode. In order to do run it, I had to: Specify /path/to/mpiexec in Edit Scheme -> Run -> Info -> Executable, instead of the default one, say myprogram if my target is called myprogram. Specify the following arguments in Edit Scheme -> Run -> Arguments -> Arguments Passed On Launch: -np 4, ${BUILT_PRODUCTS_DIR}/${EXECUTABLE_NAME} This is clearly analogous to a mpiexec -np 4 a.out command launched on terminal. The problem is, when I want to debug my application, the execution doesn't stop on the breakpoints. I instantly thought that it is because of the check box Debug Executable in Edit Scheme -> Run -> Info -> Executable. Indeed (as I have just said), the Executable specified in there is mpiexec and not myprogram. Thus, is there an option or some command I could set in Xcode to attach the lldb to myprogram?

Hello,We are having a systematic crash of the lldb-rpc-server when debugging our project, so we are unable to use the debugger. The crash is as follow:https://gist.github.com/bvirlet/89ecb0388c659932f5b572fa0d79e4f5I have submitted a crash report to Apple (FB7671116) but in the meantime I would be interested in a possible workaround.The problem is present for several developers, on different machines.Thanks!Bruno

iiOS 10 crash crash crash ****