threadleaktest hang on E2K

[ivmai]

Source: master (c5c7c53)
Host: Linux/e2k
Occurrence: rare (~1/20)
How to build: ./configure --disable-thread-local-alloc && make -j check
Related issue: #411

Reason: malloc (in GC_get_procedure_stack) is called from a signal which is invoked while executing calloc() called from pthread_create.

[ivmai]

Stack trace:

(gdb) bt
#0  0x000045d86a381700 in __lll_lock_wait_private () from /lib64/libc.so.6
#1  0x000045d86a185a40 in malloc () from /lib64/libc.so.6
#2  0x000045d869f0e0f0 in GC_get_procedure_stack () from /export/home/ivmai/bdwgc/.libs/libgc.so.1
#3  0x000045d869f0f4d8 in GC_suspend_handler_inner () from /export/home/ivmai/bdwgc/.libs/libgc.so.1
#4  0x000045d869f0e8a0 in GC_with_callee_saves_pushed () from /export/home/ivmai/bdwgc/.libs/libgc.so.1
#5  0x000045d869f0f060 in GC_suspend_handler () from /export/home/ivmai/bdwgc/.libs/libgc.so.1
#6  <signal handler called>
#7  0x000045d86a192550 in calloc () from /lib64/libc.so.6
#8  0x000045d869e47a80 in _dl_allocate_tls () from /lib64/ld-linux.so.2
#9  0x000045d869fb1098 in allocate_stack () from /lib64/libpthread.so.0
#10 0x000045d869fb93d0 in pthread_create@@GLIBC_2.1 () from /lib64/libpthread.so.0
#11 0x000045d869f23da8 in GC_pthread_create () from /export/home/ivmai/bdwgc/.libs/libgc.so.1
#12 0x0000000000010f10 in main ()

[ivmai]

Potential solution: determine the buffer size in GC_get _procedure_stack (called from signal) but call malloc from a thread which holds the GC lock.

Relates also to #413

[ivmai]

Fixed by 990dcdb (#411)