Mex debugging keeps crashing

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Michael
Michael 2018-2-17
编辑： Michael 2018-2-17
Hi
I'm following the instructions here to debug yprime.c, but Matlab crashes each and every time on execution. I'm running R2017a on Ubuntu 16.04.
What I've done is:
1) Run matlab -Dgdb
2) gdb: handle SIGSEGV SIGBUS nostop noprint
3) gdb: run -nojvm
4) >> dbmex on
5) >> yprime(1,1:4)
I then immediately get the following error:
MEX FILE: /home/jk/Projects/test/yprime.mexa64 entry point located at address 0xbaaf4bb9
Add breakpoints at the debugger prompt and issue a "continue" to resume
execution of MATLAB.
Thread 1 "MATLAB" received signal SIGUSR1, User defined signal 1.
pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
185 ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S: No such file or directory.
'bt full' gives the following:
(gdb) bt full
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1 0x00007fffe4af5b73 in ?? () from /usr/local/MATLAB/R2017a/bin/glnxa64/libmwmcr.so
No symbol table info available.
#2 0x00007fffe4af6d64 in ?? () from /usr/local/MATLAB/R2017a/bin/glnxa64/libmwmcr.so
No symbol table info available.
#3 0x00007fffe4af70e3 in mcr_run_main(boost::function0<int> const&, bool, bool) ()
from /usr/local/MATLAB/R2017a/bin/glnxa64/libmwmcr.so
No symbol table info available.
#4 0x00007fffe57b62d8 in ?? () from /usr/local/MATLAB/R2017a/bin/glnxa64/libmwMVMLocal.so
No symbol table info available.
#5 0x00007ffff62604dd in ?? () from /usr/local/MATLAB/R2017a/bin/glnxa64/libmwmvm.so
No symbol table info available.
#6 0x00007ffff62609ae in ?? () from /usr/local/MATLAB/R2017a/bin/glnxa64/libmwmvm.so
No symbol table info available.
#7 0x0000000000406080 in ?? ()
No symbol table info available.
#8 0x00007ffff47b6830 in __libc_start_main (main=0x405d70, argc=2, argv=0x7fffffffe2b8,
init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffe2a8)
at ../csu/libc-start.c:291
result = <optimized out>
unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 7758931341986087730, 4219416, 140737488347824,
0, 0, -7758930796045810894, -7758951716631231694}, mask_was_saved = 0}}, priv = {
---Type <return> to continue, or q <return> to quit---
{0x0, 0x0, 0x2, 0x405d70}, data = {prev = 0x0, cleanup = 0x0, canceltype = 2}}}
not_first_call = <optimized out>
#9 0x0000000000406241 in ?? ()
No symbol table info available.
Anyone know why Matlab keeps crashing?
Any thought appreciated.

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