[Issue 22358] Allocations from foreign threads lead to crash

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22358

Richard Cattermole <alphaglosined at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |alphaglosined at gmail.com

--- Comment #1 from Richard Cattermole <alphaglosined at gmail.com> ---
ldc's address sanitizer has some extra information:

foo done
foo done
AddressSanitizer:DEADLYSIGNAL
=================================================================
==28==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x55f694a96fd9 bp 0x7f791bdfecf0 sp 0x7f791bdfec70 T3)
==28==The signal is caused by a READ memory access.
==28==Hint: address points to the zero page.
    #0 0x55f694a96fd9 in _d_dynamic_cast (/tmp/onlineapp-a6c082+0xebfd9)
    #1 0x55f6949d73d0 in foo /sandbox/onlineapp.d:9:5
    #2 0x7f791f50c608 in start_thread
(/lib/x86_64-linux-gnu/libpthread.so.0+0x9608)
    #3 0x7f791f2c9292 in clone (/lib/x86_64-linux-gnu/libc.so.6+0x122292)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/tmp/onlineapp-a6c082+0xebfd9) in
_d_dynamic_cast
Thread T3 created by T0 here:
    #0 0x55f694a27eba in pthread_create
/home/vsts/work/1/s/compiler-rt/lib/asan/asan_interceptors.cpp:214:3
    #1 0x55f6949d7813 in _Dmain /sandbox/onlineapp.d:27:9
    #2 0x55f694a9771b in _D2rt6dmain212_d_run_main2UAAamPUQgZiZ6runAllMFZv
(/tmp/onlineapp-a6c082+0xec71b)
    #3 0x55f694a9746d in _d_run_main (/tmp/onlineapp-a6c082+0xec46d)
    #4 0x55f6949d7924 in main
/dlang/ldc-1.26.0/bin/../import/core/internal/entrypoint.d:42:17
    #5 0x7f791f1ce0b2 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x270b2)

==28==ABORTING
Error: /tmp/onlineapp-a6c082 failed with status: 1

Looks like something inside of thread_attachThis is doing a cast and not
checking for null.

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