519781 - Purify ABR warnings in sqlite when visiting intranet.mozilla.org

Status: RESOLVED INACTIVE

(Core :: SQLite and Embedded Database Bindings, defect)

Description

[Robert Sayre]

will attach log

Comment 1

[Robert Sayre]

Attachment: purify log

Comment 2

[Shawn Wilsher :sdwilsh]

The important bits:
[E] ABR: Array bounds read in memcmp {15 occurrences}
        Reading 11 bytes from 0x1b5d8718 (3 bytes at 0x1b5d8720 illegal)
        Address 0x1b5d8718 is argument #1 of memcmp
        Address 0x1b5d8718 is 56 bytes into a 64 byte block at 0x1b5d86e0
        Address 0x1b5d8718 points to a malloc'd block in heap 0x06f40000
        Thread ID: 0xed0
        Error location
            memcmp         [F:\SP\vctools\crt_bld\SELF_X86\crt\src\intel\llshl.asm]
            sqlite3ExprAssignVarNumber [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:59217]
            yy_reduce      [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:23204]
            sqlite3Parser  [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:23835]
            sqlite3RunParser [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:24666]
            sqlite3Prepare [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:9582]
            sqlite3LockAndPrepare [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:9672]
            sqlite3_prepare_v2 [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:9747]
            mozilla::storage::Statement::initialize(Connection::storage::mozilla *,nsACString_internal const&) [c:\dev\tracemonkey\storage\src\mozstoragestatement.cpp:200]
            mozilla::storage::Connection::CreateStatement(nsACString_internal const&,mozIStorageStatement * *) [c:\dev\tracemonkey\storage\src\mozstorageconnection.cpp:617]
        Allocation location
            malloc         [f:\sp\vctools\crt_bld\self_x86\crt\src\dbgheap.c:153]
            sqlite3MemMalloc [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:12269]
            sqlite3Malloc  [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:15504]
            sqlite3DbMallocRaw [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:15813]
            sqlite3DbMallocZero [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:15764]
            sqlite3ExprAlloc [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:59030]
            sqlite3PExpr   [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:59121]
            spanExpr       [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:20693]
            yy_reduce      [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:23203]
            sqlite3Parser  [c:\dev\tracemonkey\db\sqlite3\src\sqlite3.c:23835]

Comment 3

[Julian Seward [:jseward]]

Can't reproduce using Valgrind (on Wine on Linux) using debug build
of m-c on WinXP.  If I had to guess, Purify is not correctly handling
an optimised/vectorised memcmp correctly; but that's only a guess.
sqlite3.c looks pretty cross platform to me, so we should also see
this on Linux/MacOS if it was real.

Comment 4

[BMO Automation]

Per policy at https://wiki.mozilla.org/Bug_Triage/Projects/Bug_Handling/Bug_Husbandry#Inactive_Bugs. If this bug is not an enhancement request or a bug not present in a supported release of Firefox, then it may be reopened.