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| author | Björn Gustavsson <[email protected]> | 2012-11-19 15:35:05 +0100 |
|---|---|---|
| committer | Björn Gustavsson <[email protected]> | 2012-11-19 15:35:05 +0100 |
| commit | 011bb8a503c7ff967996c32a656d3e6436d017f7 (patch) | |
| tree | 08d6645a0cd74ea90a50748c015cd3146895b5ed /lib/test_server/src/test_server_io.erl | |
| parent | 2cec24c37208c360123740f3af6b09aa33697f5f (diff) | |
| download | otp-011bb8a503c7ff967996c32a656d3e6436d017f7.tar.gz otp-011bb8a503c7ff967996c32a656d3e6436d017f7.tar.bz2 otp-011bb8a503c7ff967996c32a656d3e6436d017f7.zip | |
Fix race condition in test_server_io
In test_server_io:gc/1 we collect the group leaders for all processes.
We must handle the case that a process has died after processes/0
was called and process_info(P, group_leader) is called.
Diffstat (limited to 'lib/test_server/src/test_server_io.erl')
| -rw-r--r-- | lib/test_server/src/test_server_io.erl | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/test_server/src/test_server_io.erl b/lib/test_server/src/test_server_io.erl index e960b3087a..777b377201 100644 --- a/lib/test_server/src/test_server_io.erl +++ b/lib/test_server/src/test_server_io.erl @@ -307,8 +307,10 @@ do_print_buffered(Q0, St) -> gc(#st{gls=Gls0}) -> InUse0 = [begin - {group_leader,GL} = process_info(P, group_leader), - GL + case process_info(P, group_leader) of + {group_leader,GL} -> GL; + undefined -> undefined + end end || P <- processes()], InUse = ordsets:from_list(InUse0), Gls = gb_sets:to_list(Gls0), |