Co_broadcast_cptr

[bonachea]

Implements https://github.com/BerkeleyLab/prif/issues/156

[bonachea]

@certik while you're fixing LFortran bugs impacting Caffeine, here's another branch for an orthogonal forthcoming Caffeine feature that also fails (at runtime) with LFortran 0.62 and latest. It's getting a SEGV inside broadcast_derived_type() in test/prif_co_broadcast_test.F90

Here is a crash stack from LFortran 0.62:

[0] #13 0x000077552cc288ff in __GI_abort () at ./stdlib/abort.c:79
[0] #14 0x000077552cc297b6 in __libc_message_impl (fmt=fmt@entry=0x77552cdce8d7 "%s\n") at ../sysdeps/posix/libc_fatal.c:134
[0] #15 0x000077552cca8ff5 in malloc_printerr (str=str@entry=0x77552cdd1ac0 "double free or corruption (out)") at ./malloc/malloc.c:5775
[0] #16 0x000077552ccab120 in _int_free_merge_chunk (av=0x77552ce03ac0 <main_arena>, p=0x60297a7c4040, size=105731264887424) at ./malloc/malloc.c:4676
[0] #17 0x000077552ccaddce in __GI___libc_free (mem=0x60297a7c4050) at ./malloc/malloc.c:3398
[0] #18 0x0000602961e898f5 in finalize_StructType__object_t_of_prif_co_broadcast_test_m ()
[0] #19 0x0000602961e87527 in __module_prif_co_broadcast_test_m_broadcast_derived_type ()
[0] #20 0x0000602962011872 in __module_julienne_test_description_m_run ()
[0] #21 0x0000602962036ba2 in __module_julienne_test_m_run ()
[0] #22 0x0000602961e87cba in __module_prif_co_broadcast_test_m_results ()
[0] #23 0x0000602962033c98 in __module_julienne_test_m_report ()
[0] #24 0x000060296202d93e in __module_julienne_test_fixture_m_report ()
[0] #25 0x000060296202e82b in __module_julienne_test_harness_m_report_results ()
[0] #26 0x0000602961e69e7b in main ()

[certik]

I can confirm that the previous main (328531f62f3d5c50b575003f936d0853712d8c1b) indeed failed, for me it fails with:

PRIF Coarray Inquiries
*** Caught a fatal signal (proc 0): SIGABRT(6)
*** NOTICE (proc 0): Before reporting bugs, run with GASNET_BACKTRACE=1 in the environment to generate a backtrace.
*** NOTICE (proc 0): We recommend linking the debug version of GASNet to assist you in resolving this application issue.
<ERROR> Execution for object " julienne-driver " returned exit code  6
<ERROR> *cmd_run*:stopping due to failed executions
STOP 6

The latest LFortran main (e9c464d2521a3bb5225c47e7752d91b65c2fdec6) compiles and runs all tests for this.

So I think this is now fixed thanks to lfortran/lfortran#11181.

[bonachea]

The latest LFortran main (e9c464d2521a3bb5225c47e7752d91b65c2fdec6) compiles and runs all tests for this.

So I think this is now fixed thanks to lfortran/lfortran#11181.

@certik The failing CI run I linked above used lfortran:latest from about 30 minutes ago, which I think already includes your changes from lfortran/lfortran#11181 . I'm re-running it again now to be sure.

[certik]

Ok, we'll have to figure out how to extract the MRE for this. I made this lfortran/lfortran#11191.

[bonachea]

@certik: Failed again just now with lfortran:latest:

  Digest: sha256:33b503f927b869a889d9885be8330ba8485082861fa51c22b503e33ff27f7040
  Status: Downloaded newer image for ghcr.io/lfortran/lfortran:latest
  ghcr.io/lfortran/lfortran:latest
...
+ lfortran --version
LFortran version: 0.62.0-234-ge9c464d25
Status: alpha (expected to fail on third-party codes)
Platform: Linux
LLVM: 11.1.0
Default target: x86_64-unknown-linux-gnu
LSP Version: 3.17.0
JSON_RPC Version: 2.0
...
prif_co_broadcast
free(): invalid pointer
free(): invalid pointer
free(): invalid pointer
*** Caught a fatal signal (proc 6): SIGABRT(6)

[bonachea]

The original code where the LFortran defect arose is archived in this branch:

https://github.com/bonachea/caffeine/tree/refs/heads/co_broadcast_cptr-lfortran1

This pull request will advance by deploying a workaround that skips the failing test on LFortran, at least for now.

[bonachea]

Superseded by BerkeleyLab#319