Tim Armstrong has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/9424 )

Change subject: IMPALA-6008: Creating a UDF from a shared library with a .ll 
extenion crashes impala
......................................................................

IMPALA-6008: Creating a UDF from a shared library with a .ll extenion
crashes impala

Impala crashes on creating a UDF from a shared library (.so file) which
was renamed to have .ll extension. CreateFile() call in GetSymbols()
fails and returns on error and does not close the codegen object. This
patch closes the codegen object on failure. This avoids hitting a DCHECK
later up in the stack.
The chain of failures also invokes the DiagnosticHandlerFn. RuntimeState
object is NULL when the DiagnosticHandlerFn gets called in this case.
This change also adds a check before accessing it for logging.

[localhost:21000] > create function foo4 (string, string) returns string
location '/tmp/bad_udf.ll' symbol='MyAwesomeUdf';
Query: create function foo4 (string, string) returns string location
'/tmp/bad_udf.ll' symbol='MyAwesomeUdf'
ERROR: AnalysisException: Could not load binary: /tmp/bad_udf.ll
LLVM diagnostic error: Invalid bitcode signature

Change-Id: Id060668802ca9c80367cdc0e8a823b968d549bbb
Reviewed-on: http://gerrit.cloudera.org:8080/9154
Reviewed-by: Tim Armstrong <tarmstr...@cloudera.com>
Tested-by: Impala Public Jenkins
Reviewed-on: http://gerrit.cloudera.org:8080/9424
Tested-by: Tim Armstrong <tarmstr...@cloudera.com>
---
M be/src/codegen/llvm-codegen.cc
M testdata/workloads/functional-query/queries/QueryTest/udf-errors.test
M tests/query_test/test_udfs.py
3 files changed, 48 insertions(+), 14 deletions(-)

Approvals:
  Tim Armstrong: Looks good to me, approved; Verified

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Gerrit-Project: Impala-ASF
Gerrit-Branch: 2.x
Gerrit-MessageType: merged
Gerrit-Change-Id: Id060668802ca9c80367cdc0e8a823b968d549bbb
Gerrit-Change-Number: 9424
Gerrit-PatchSet: 2
Gerrit-Owner: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: anujphadke <apha...@cloudera.com>

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