On Thu, 2018-02-01 at 21:31 +0100, Marek Olšák wrote:
> 
> Valgrind doesn't show any memory-related issue with Mesa. It does show
> an issue with "New Unity Project". This can corrupt the heap and cause
> a random crash on the next call of malloc/free/new/delete:
> 
> ==17721== Mismatched free() / delete / delete []
> ==17721==    at 0x4C311E8: operator delete(void*) (vg_replace_malloc.c:576)
> ==17721==    by 0xD4482C: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0xD315D8: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x4FD79A: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x7E6350: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x8197CC: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x4608A1: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x5D7B009: (below main) (libc-start.c:308)
> ==17721==  Address 0x1f6bf470 is 0 bytes inside a block of size 220 alloc'd
> ==17721==    at 0x4C308B7: operator new[](unsigned long)
> (vg_replace_malloc.c:423)
> ==17721==    by 0xD47CF3: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0xD3EF39: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x4FD712: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x7E2B8D: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x818B52: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x4603F1: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x5D7B009: (below main) (libc-start.c:308)
> ==17721==
> ==17721== Mismatched free() / delete / delete []
> ==17721==    at 0x4C311E8: operator delete(void*) (vg_replace_malloc.c:576)
> ==17721==    by 0xD44843: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0xD315D8: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x4FD79A: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x7E6350: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x8197CC: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x4608A1: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x5D7B009: (below main) (libc-start.c:308)
> ==17721==  Address 0x1f6bf590 is 0 bytes inside a block of size 220 alloc'd
> ==17721==    at 0x4C308B7: operator new[](unsigned long)
> (vg_replace_malloc.c:423)
> ==17721==    by 0xD47ED7: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0xD3EF39: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x4FD712: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x7E2B8D: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x818B52: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x4603F1: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
> ==17721==    by 0x5D7B009: (below main) (libc-start.c:308)
> 
> Marek


Tak  said: We'll investigate, but if that were the case, wouldn't it affect the 
intel driver the same way?

I also checked same Unity project under Valgrind on Intel GPU and see same 
errors in log:

==3407== Mismatched free() / delete / delete []
==3407==    at 0x4C311E8: operator delete(void*) (vg_replace_malloc.c:576)
==3407==    by 0xD4482C: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0xD315D8: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x4FD79A: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x7E6350: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x8197CC: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x4608A1: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x5D7B009: (below main) (libc-start.c:308)
==3407==  Address 0x17065190 is 0 bytes inside a block of size 220 alloc'd
==3407==    at 0x4C308B7: operator new[](unsigned long) 
(vg_replace_malloc.c:423)
==3407==    by 0xD47CF3: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0xD3EF39: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x4FD712: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x7E2B8D: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x818B52: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x4603F1: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x5D7B009: (below main) (libc-start.c:308)

==3407== Mismatched free() / delete / delete []
==3407==    at 0x4C311E8: operator delete(void*) (vg_replace_malloc.c:576)
==3407==    by 0xD44843: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0xD315D8: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x4FD79A: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x7E6350: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x8197CC: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x4608A1: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x5D7B009: (below main) (libc-start.c:308)
==3407==  Address 0x170652b0 is 0 bytes inside a block of size 220 alloc'd
==3407==    at 0x4C308B7: operator new[](unsigned long) 
(vg_replace_malloc.c:423)
==3407==    by 0xD47ED7: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0xD3EF39: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x4FD712: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x7E2B8D: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x818B52: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x4603F1: ??? (in /home/mikhail/New Unity Project/aaa.x86_64)
==3407==    by 0x5D7B009: (below main) (libc-start.c:308)


What answer to Tak?
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