[trafficserver] branch 9.2.x updated: Fix null-pointer-subtraction warning (#8433)

[zw...@apache.org]

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zwoop pushed a commit to branch 9.2.x
in repository https://gitbox.apache.org/repos/asf/trafficserver.git


The following commit(s) were added to refs/heads/9.2.x by this push:
     new a7acc44  Fix null-pointer-subtraction warning (#8433)
a7acc44 is described below

commit a7acc44a32df59b8da538998a3617b67599e195a
Author: Masaori Koshiba <ma...@apache.org>
AuthorDate: Wed Oct 20 08:12:21 2021 +0900

    Fix null-pointer-subtraction warning (#8433)
    
    (cherry picked from commit 48f34d7b1421587e5a4643dd8e195dcab122aca4)
---
 lib/records/RecRawStats.cc | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/records/RecRawStats.cc b/lib/records/RecRawStats.cc
index 59dee7f..9d87cba 100644
--- a/lib/records/RecRawStats.cc
+++ b/lib/records/RecRawStats.cc
@@ -576,9 +576,7 @@ RecRawStatUpdateSum(RecRawStatBlock *rsb, int id)
 {
   RecRawStat *raw = rsb->global[id];
   if (nullptr != raw) {
-    RecRecord *r = reinterpret_cast<RecRecord *>(reinterpret_cast<char *>(raw) -
-                                                 (reinterpret_cast<char *>(&reinterpret_cast<RecRecord *>(0)->stat_meta) -
-                                                  reinterpret_cast<char *>(reinterpret_cast<RecRecord *>(0))));
+    RecRecord *r = reinterpret_cast<RecRecord *>(reinterpret_cast<char *>(raw) - offsetof(struct RecRecord, stat_meta));
 
     RecDataSetFromInt64(r->data_type, &r->data, rsb->global[id]->sum);
     r->sync_required = REC_SYNC_REQUIRED;