Hi guys,

I wonder if someone could give me a hand to find out why a FFI calling I am doing is crashing. In OSX it works correct but I am testing in CentOS and it fails. I wonder if it also crashes in other Linuxes too.��

I am using latest Pharo 5.0 with Spur. To reproduce:

1) Get latest Pharo 5.0 and Spur via:

wget -O- get.pharo.org/alpha+vm | bash

2) Inside Pharo, load my prototype tool:

Gofer it

package: 'OSSubprocess';

url: 'http://smalltalkhub.com/mc/marianopeck/OSSubprocess/main';

load.

3) This is the code I am executing and it's crashing:

| posixSpawnFileActionsT | posixSpawnFileActionsT := ExternalAddress allocate: 4. OSSUnixSubprocess new primitivePosixSpawnFileActionsInit: posixSpawnFileActionsT. posixSpawnFileActionsT free. ��

4) The primitive is as simple as:

primitivePosixSpawnFileActionsInit: aPosixSpawnFileActionsT��

^ self ffiCall: #( int posix_spawn_file_actions_init(void* aPosixSpawnFileActionsT) ) module: LibC

I have no idea what I am doing wrong. And again, this works on OSX. The function I am calling is: ��int posix_spawn_file_actions_init(posix_spawn_file_actions_t *file_actions); as you can read in [1]

Below is the stacktrace I get the Linux terminal.

Any hint is greatly appreciated.

Thanks,

[1] http://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_spawn_file_actions_destroy.html

*** Error in `/home/centos/pharo-vm/pharo': malloc(): memory corruption (fast): 0x09544268 ***

======= Backtrace: =========

/lib/libc.so.6(+0x7428c)[0xf758e28c]

/lib/libc.so.6(+0x76d98)[0xf7590d98]

/lib/libc.so.6(__libc_calloc+0xa7)[0xf7592df7]

/home/centos/pharo-vm/pharo[0x80b8f44]

/home/centos/pharo-vm/pharo[0x80b909c]

/home/centos/pharo-vm/pharo(ioLoadExternalFunctionOfLengthFromModuleOfLengthAccessorDepthInto+0xc2)[0x80b9402]

/home/centos/pharo-vm/pharo[0x808de6f]

/home/centos/pharo-vm/pharo[0x80a0810]

/home/centos/pharo-vm/pharo(ceSendsupertonumArgs+0x1da)[0x80a1f4a]

[0x960004c]

[0x9600b00]

[0xaec2e9b]

[0xaec3481]

[0x9604ff0]

[0x964ed43]

[0x9604f5c]

[0x960424c]

[0x9602e47]

[0x9602be7]

[0x960320c]

[0x9602277]

[0x960bec2]

[0x9600b00]

[0x9600ad8]

======= Memory map: ========

08048000-08151000 r-xp 00000000 fd:01 202178584 �� /home/centos/pharo-vm/pharo

08151000-08152000 r--p 00108000 fd:01 202178584 �� /home/centos/pharo-vm/pharo

08152000-0815c000 rw-p 00109000 fd:01 202178584 �� /home/centos/pharo-vm/pharo

0815c000-08193000 rw-p 00000000 00:00 0��

09505000-095a5000 rw-p 00000000 00:00 0 �� [heap]

09600000-09701000 rwxp 00000000 00:00 0��

09701000-0dbc0000 rw-p 00000000 00:00 0��

f6de5000-f6dfe000 r-xp 00000000 fd:01 203854803 �� /usr/lib/libgcc_s-4.8.5-20150702.so.1

f6dfe000-f6dff000 r--p 00018000 fd:01 203854803 �� /usr/lib/libgcc_s-4.8.5-20150702.so.1

f6dff000-f6e00000 rw-p 00019000 fd:01 203854803 �� /usr/lib/libgcc_s-4.8.5-20150702.so.1

f6e00000-f6e21000 rw-p 00000000 00:00 0��

f6e21000-f6f00000 ---p 00000000 00:00 0��

f6f25000-f6f26000 rw-p 00000000 00:00 0��

f6f26000-f6f2e000 r-xp 00000000 fd:01 202178580 �� /home/centos/pharo-vm/libSqueakFFIPrims.so

f6f2e000-f6f2f000 r--p 00007000 fd:01 202178580 �� /home/centos/pharo-vm/libSqueakFFIPrims.so

f6f2f000-f6f30000 rw-p 00008000 fd:01 202178580 �� /home/centos/pharo-vm/libSqueakFFIPrims.so

f6f30000-f6f32000 r-xp 00000000 fd:01 203140415 �� /usr/lib/libXau.so.6.0.0

f6f32000-f6f33000 r--p 00001000 fd:01 203140415 �� /usr/lib/libXau.so.6.0.0

f6f33000-f6f34000 rw-p 00002000 fd:01 203140415 �� /usr/lib/libXau.so.6.0.0

f6f34000-f6f5b000 r-xp 00000000 fd:01 201498737 �� /usr/lib/liblzma.so.5.0.99

f6f5b000-f6f5d000 r--p 00026000 fd:01 201498737 �� /usr/lib/liblzma.so.5.0.99

f6f5d000-f6f5e000 rw-p 00028000 fd:01 201498737 �� /usr/lib/liblzma.so.5.0.99

f6f5e000-f6fc0000 r-xp 00000000 fd:01 201348055 �� /usr/lib/libpcre.so.1.2.0

f6fc0000-f6fc2000 r--p 00061000 fd:01 201348055 �� /usr/lib/libpcre.so.1.2.0

f6fc2000-f6fc3000 rw-p 00063000 fd:01 201348055 �� /usr/lib/libpcre.so.1.2.0

f6fc3000-f6fcf000 r-xp 00000000 fd:01 202740809 �� /usr/lib/libdrm.so.2.4.0

f6fcf000-f6fd0000 r--p 0000b000 fd:01 202740809 �� /usr/lib/libdrm.so.2.4.0

f6fd0000-f6fd1000 rw-p 0000c000 fd:01 202740809 �� /usr/lib/libdrm.so.2.4.0

f6fd1000-f6fd5000 r-xp 00000000 fd:01 202740799 �� /usr/lib/libXxf86vm.so.1.0.0

f6fd5000-f6fd6000 r--p 00004000 fd:01 202740799 �� /usr/lib/libXxf86vm.so.1.0.0

f6fd6000-f6fd7000 rw-p 00005000 fd:01 202740799 �� /usr/lib/libXxf86vm.so.1.0.0

f6fd7000-f6fd8000 r-xp 00000000 fd:01 201522922 �� /usr/lib/libxshmfence.so.1.0.0

f6fd8000-f6fd9000 r--p 00000000 fd:01 201522922 �� /usr/lib/libxshmfence.so.1.0.0

f6fd9000-f6fda000 rw-p 00001000 fd:01 201522922 �� /usr/lib/libxshmfence.so.1.0.0

f6fda000-f6ffd000 r-xp 00000000 fd:01 202740769 �� /usr/lib/libxcb.so.1.1.0

f6ffd000-f6ffe000 r--p 00022000 fd:01 202740769 �� /usr/lib/libxcb.so.1.1.0

f6ffe000-f6fff000 rw-p 00023000 fd:01 202740769 �� /usr/lib/libxcb.so.1.1.0

f6fff000-f7004000 r-xp 00000000 fd:01 201522899 �� /usr/lib/libxcb-sync.so.1.0.0

f7004000-f7005000 r--p 00005000 fd:01 201522899 �� /usr/lib/libxcb-sync.so.1.0.0

f7005000-f7006000 rw-p 00006000 fd:01 201522899 �� /usr/lib/libxcb-sync.so.1.0.0

f7006000-f7009000 r-xp 00000000 fd:01 201522895 �� /usr/lib/libxcb-shape.so.0.0.0

f7009000-f700a000 r--p 00002000 fd:01 201522895 �� /usr/lib/libxcb-shape.so.0.0.0

f700a000-f700b000 rw-p 00003000 fd:01 201522895 �� /usr/lib/libxcb-shape.so.0.0.0

f700b000-f7014000 r-xp 00000000 fd:01 201522889 �� /usr/lib/libxcb-render.so.0.0.0

f7014000-f7015000 r--p 00008000 fd:01 201522889 �� /usr/lib/libxcb-render.so.0.0.0

f7015000-f7016000 rw-p 00009000 fd:01 201522889 �� /usr/lib/libxcb-render.so.0.0.0

f7016000-f701d000 r-xp 00000000 fd:01 201522905 �� /usr/lib/libxcb-xfixes.so.0.0.0

f701d000-f701e000 r--p 00006000 fd:01 201522905 �� /usr/lib/libxcb-xfixes.so.0.0.0

f701e000-f701f000 rw-p 00007000 fd:01 201522905 �� /usr/lib/libxcb-xfixes.so.0.0.0

f701f000-f702c000 r-xp 00000000 fd:01 201522885 �� /usr/lib/libxcb-randr.so.0.1.0

f702c000-f702d000 r--p 0000d000 fd:01 201522885 �� /usr/lib/libxcb-randr.so.0.1.0

f702d000-f702e000 rw-p 0000e000 fd:01 201522885 �� /usr/lib/libxcb-randr.so.0.1.0

f702e000-f7030000 r-xp 00000000 fd:01 201522883 �� /usr/lib/libxcb-present.so.0.0.0

f7030000-f7031000 r--p 00001000 fd:01 201522883 �� /usr/lib/libxcb-present.so.0.0.0

f7031000-f7032000 rw-p 00002000 fd:01 201522883 �� /usr/lib/libxcb-present.so.0.0.0

f7032000-f7034000 r-xp 00000000 fd:01 203140423 �� /usr/lib/libxcb-dri3.so.0.0.0

f7034000-f7035000 r--p 00001000 fd:01 203140423 �� /usr/lib/libxcb-dri3.so.0.0.0

f7035000-f7036000 rw-p 00002000 fd:01 203140423 �� /usr/lib/libxcb-dri3.so.0.0.0

f7036000-f703a000 r-xp 00000000 fd:01 203140421 �� /usr/lib/libxcb-dri2.so.0.0.0./pharo-ui: line 11: ��4019 Aborted �� (core dumped) "$DIR"/"pharo-vm/pharo" "$@"

Mariano
http://marianopeck.wordpress.com