Boost C++ Libraries: Ticket #13626: Growing managed mapped file cause a pointer invalidation

attachment set

bvbfan@… — Thu, 05 Jul 2018 15:49:17 GMT

attachment → main.cpp

g++ main.cpp -o main

bvbfan@… — Thu, 05 Jul 2018 15:53:54 GMT

[toni@toni-pc ~]$ uname -a
Linux toni-pc 4.16.14-1 #1 SMP PREEMPT Tue Jun 5 20:05:46 UTC 2018 x86_64 GNU/Linux

Provided example *works* when grow size is below 7*500.

anonymous — Thu, 05 Jul 2018 15:55:52 GMT

For some reason gcc all version is marked as spam so -> gcc version 7.3.0 (GCC) Growing algorithm not work in all cases when size over 6*500 bytes which is not that much to make grow usable.

anonymous — Thu, 05 Jul 2018 15:57:43 GMT

[toni@toni-pc test]$ ./main
10000
before growing:
size: 10000
p is owned: 1
p->test is owned: 1
p->test = 0x7f6cd51f3090
after growing
size: 13500
p is owned: 1
p->test is owned: 0
p->test = 0

My results of attached example. p->test *should* be valid.