new(malloc) locks everything in multithreading

[tcak via Digitalmars-d-learn]

On Friday, 24 October 2014 at 16:51:02 UTC, Kapps wrote:
> On Friday, 24 October 2014 at 10:49:42 UTC, tcak wrote:
>
> Not sure if this is the same issue, but by default gdb breaks 
> on signals that the GC uses, which would explain why it's 
> breaking in gdb but not normally.
>
> What happens if you try:
> handle SIGUSR1 noprint nostop
> handle SIGUSR2 noprint nostop
>
> In GDB before starting execution of the program?

This is what I did on shell: (I put some spaces for readability)

tolga at tolga:~/dev/d/bug$ dmd -gc -debug test.d

tolga at tolga:~/dev/d/bug$ gdb ./test

GNU gdb (Ubuntu 7.7-0ubuntu3.1) 7.7
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Reading symbols from ./test...done.

(gdb) run

Starting program: /home/tolga/dev/d/bug/test
[Thread debugging using libthread_db enabled]
Using host libthread_db library 
"/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff75ed700 (LWP 4940)]

Program received signal SIGUSR1, User defined signal 1.
[Switching to Thread 0x7ffff75ed700 (LWP 4940)]
__lll_lock_wait_private () at 
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
95	../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: No such 
file or directory.

(gdb) backtrace full

#0  __lll_lock_wait_private () at 
../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
No locals.
#1  0x00007ffff7bc52f1 in _L_lock_3358 () from 
/lib/x86_64-linux-gnu/libpthread.so.0
No symbol table info available.
#2  0x00007ffff7bc4382 in start_thread (arg=0x7ffff75ed700) at 
pthread_create.c:301
         oldtype = 0
         pd = 0x7ffff75ed700
         now = <optimised out>
         unwind_buf = {cancel_jmp_buf = {{jmp_buf = 
{140737343575808, 9112392114346628883, 1, 0,
                 140737343576512, 140737343575808, 
-9112375355952097517, -9112375093712283885},
               mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 
0x0}, data = {prev = 0x0,
               cleanup = 0x0, canceltype = 0}}}
         not_first_call = <optimised out>
         pagesize_m1 = <optimised out>
         sp = <optimised out>
         freesize = <optimised out>
         __PRETTY_FUNCTION__ = "start_thread"
#3  0x00007ffff76e8fbd in clone () at 
../sysdeps/unix/sysv/linux/x86_64/clone.S:111
No locals.

(gdb)