| From: | Jerry Sievers <gsievers19(at)comcast(dot)net> |
|---|---|
| To: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
| Cc: | Jerry Sievers <gsievers19(at)comcast(dot)net>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: SegFault on 9.6.14 |
| Date: | 2019-07-16 23:42:03 |
| Message-ID: | 8736j5a6no.fsf@jsievers.enova.com |
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| Thread: | |
| Lists: | pgsql-hackers |
Thomas Munro <thomas(dot)munro(at)gmail(dot)com> writes:
> On Wed, Jul 17, 2019 at 11:06 AM Jerry Sievers <gsievers19(at)comcast(dot)net> wrote:
>
>> (gdb) p *scan->rs_parallel
>> Cannot access memory at address 0x7fa673a54108
>
> So I guess one question is: was it a valid address that's been
> unexpectedly unmapped, or is the pointer corrupted? Any chance you
> can strace the backend and pull out the map, unmap calls?
There were about 60k lines from strace including these few...
mmap(NULL, 528384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d0127a000
mmap(NULL, 266240, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3d01239000
mmap(NULL, 287624, PROT_READ|PROT_WRITE, MAP_SHARED, 124, 0) = 0x7f3d011f2000
mmap(NULL, 262504, PROT_READ|PROT_WRITE, MAP_SHARED, 124, 0) = 0x7f3d011b1000
munmap(0x7f3d011b1000, 262504) = 0
Thx
--
Jerry Sievers
Postgres DBA/Development Consulting
e: postgres(dot)consulting(at)comcast(dot)net
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