Hello Lars Volker, Tim Armstrong, Impala Public Jenkins,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/13769
to look at the new patch set (#3).
Change subject: IMPALA-5031: method calls on NULL are not UBSAN-clean
......................................................................
IMPALA-5031: method calls on NULL are not UBSAN-clean
According to [expr.post] in the C++14 standard, a call to a member
function like a->b() is interpreted as (a->b)(). In other words, the
dereferencing is done separately from the call. This makes calling
member functions on nullptr undefined behavior, since the dereference
invokes undefined behavior.
This fixes such an error in exec-node.cc in the end-to-end tests. The
interesting part of the backtrace is:
exec/exec-node.cc:396:27: runtime error: member call on null pointer
of type 'MemTracker'
#0 in ExecNode::ExecDebugActionImpl(TExecNodePhase::type,
RuntimeState*) exec/exec-node.cc:396:27
#1 in ExecNode::ExecDebugAction(TExecNodePhase::type,
RuntimeState*) exec/exec-node.h:379:12
#2 in ExecNode::Prepare(RuntimeState*) exec/exec-node.cc:106:43
#3 in TopNNode::Prepare(RuntimeState*) exec/topn-node.cc:75:53
Change-Id: Id62d1c504a273451dc1be6831a473f6c7115b403
---
M be/src/exec/exec-node.cc
M be/src/runtime/mem-tracker.cc
M be/src/runtime/mem-tracker.h
3 files changed, 24 insertions(+), 12 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/69/13769/3
--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Id62d1c504a273451dc1be6831a473f6c7115b403
Gerrit-Change-Number: 13769
Gerrit-PatchSet: 3
Gerrit-Owner: Jim Apple <jbap...@apache.org>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Lars Volker <l...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
