I use UTM.app for virtualisation. I have full virtualise "Fedora 38-aarch64" in UTM.app with rosetta enabled. After upgrading Sonoma to 14.3 it stop properly virtualised shared memory. I have this test file:
#include <stdio.h>
#include <sys/shm.h>
#include <sys/stat.h>
int main ()
{
int segment_id;
char* shared_memory;
struct shmid_ds shmbuffer;
int segment_size;
const int shared_segment_size = 0x6400;
/* Allocate a shared memory segment. */
segment_id = shmget (IPC_PRIVATE, shared_segment_size,
IPC_CREAT | IPC_EXCL | S_IRUSR | S_IWUSR);
/* Attach the shared memory segment. */
shared_memory = (char*) shmat (segment_id, 0, 0);
printf ("shared memory attached at address %p\n", shared_memory);
/* Determine the segment's size. */
shmctl (segment_id, IPC_STAT, &shmbuffer);
segment_size = shmbuffer.shm_segsz;
printf ("segment size: %d\n", segment_size);
/* Write a string to the shared memory segment. */
sprintf (shared_memory, "Hello, world.");
/* Detach the shared memory segment. */
shmdt (shared_memory);
/* Reattach the shared memory segment, at a different address. */
shared_memory = (char*) shmat (segment_id, (void*) 0x5000000, 0);
printf ("shared memory reattached at address %p\n", shared_memory);
/* Print out the string from shared memory. */
printf ("%s\n", shared_memory);
/* Detach the shared memory segment. */
shmdt (shared_memory);
/* Deallocate the shared memory segment. */
shmctl (segment_id, IPC_RMID, 0);
return 0;
}
Command to compile it is
gcc -Wall a.c && ./a.out
- When I compile it in virtualised Fedora work properly show this:
shared memory attached address
segment size:
shared memory reattached address
Hello, world.
- When I compile directly on M1 mac id it die
shared memory attached address
segment size:
shared memory reattached address
Segmentation fault:
- I'm try it also in docker x86 in virtualised fedora and also show error
- In "Fedora 38-aarch64 virtualised" run x86 docker "docker run -it --platform linux/amd64 oraclelinux:7.9 bash"
- Install gcc in docker shell "yum install -y gcc"
- After compile and run it die with
shared memory attached address
segment size:
shared memory reattached address
Hello, world.
assertion failed [rem_idx != ]: Unable find existing allocation shared memory segment to unmap
(VMAllocationTracker.cpp remove_shared_mem)
Trace/breakpoint (core dumped)
How can I fix it?
On previous version of Sonoma works properly.
Thank you
Main issue is in rosetta virtualization. So I use UTM.app for virtualize Fedora 38-aarch64 with rosetta enabled. Shared memory C-source test in fedora produce properly output. Main problem is when I try to run amd64 virtualized docker instance in fedora and test shared memory C-source test with rosetta that it produce this error:
assertion failed [rem_idx != ]: Unable find existing allocation shared memory segment to unmap
(VMAllocationTracker.cpp remove_shared_mem)
Trace/breakpoint (core dumped)
On previous version of Sonoma it work properly. Error occurred on Sonoma 14.3. I also try to upgrade to latest 14.3.1 but still has same.
Fast check of rosetta emulation is use Rancher desktop -> In preference -> Go to 'Virtual Machine' tab -> enable 'VZ' + enable 'Rosetta support'
Next go to Images section -> Add image -> amd64/centos:7 -> Pull
Run docker amd64 image -> docker run -it --platform=linux/amd64 amd64/centos:7 bash
Check if process use rosetta -> ps ax -> should show
[root@7c9941f11436 /]# ps ax
PID TTY STAT TIME COMMAND
1 pts/0 Ss 0:00 /mnt/lima-rosetta/rosetta /usr/bin/bash
15 pts/0 R+ 0:00 /usr/bin/ps ax
Compile share C-source file and run it and it show error in emulation
shared memory attached at address 0x7fffff1ff000
segment size: 25600
shared memory reattached at address 0x5000000
Hello, world.
assertion failed [rem_idx != -1]: Unable to find existing allocation for shared memory segment to unmap
(VMAllocationTracker.cpp:745 remove_shared_mem)
Trace/breakpoint trap (core dumped)
When I run same step on "arm64v8/centos" image it produce propelry output
[root@c8e5c3806b38 /]# ./a.out
shared memory attached at address 0xffff91e3e000
segment size: 25600
shared memory reattached at address 0x5000000
Hello, world.
[root@c8e5c3806b38 /]#
So I think there is some problem in rosetta 2 in Sonoma 14.3 and newer when try to run shmdt() function for detach shared memory segment which call in Rosetta
assertion failed [rem_idx != -1]: Unable to find existing allocation for shared memory segment to unmap
(VMAllocationTracker.cpp:745 remove_shared_mem)
Trace/breakpoint trap (core dumped)