I wanted to add the following message that I get from glibc
*** glibc detected *** double free or corruption (out): 0x097b8e80 ***

Also, I googled around for this string and it looks as though it can
be caused by:

char *ptr = malloc(sizeof(char)*200);

ptr += 10;

free( ptr ); // opps

-todd

On Fri, 31 Dec 2004 00:29:00 -0500, Todd Fisher <todd.fisher@...> wrote:
> Hi,
> I have an application that links statically to firebird and am
> getting the following stake trace when running with valgrind:
>
> The invalid free is happening when I call IBPP::Prepare, which looks
> like an invalid free finally happening in firebird. This is the
> firebird 1.5.2 code base.
>
> Does, this appear like it could be something i'm doing? It only appears to crash
> my program sometimes, like maybe there is a race condition? My application
> is not multi-threaded when making database calls.
>
> thanks,
> todd
>
> ==2354== Invalid free() / delete / delete[]
> ==2354== at 0x1B90513F: operator delete(void*) (vg_replace_malloc.c:156)
> ==2354== by 0x1C1AD28F: garbage_collect (vio.cpp:3338)
> ==2354== by 0x1C1AEF57: purge (vio.cpp:4318)
> ==2354== by 0x1C1B08A9: VIO_chase_record_version (vio.cpp:861)
> ==2354== by 0x1C1B4296: VIO_get (vio.cpp:1672)
> ==2354== by 0x1C2917FA: get_record(tdbb*, Rsb*, Rsb*, rse_get_mode)
> (rse.cpp:2302)
> ==2354== by 0x1C2920A9: get_record(tdbb*, Rsb*, Rsb*, rse_get_mode)
> (rse.cpp:2583)
> ==2354== by 0x1C293F63: RSE_get_record(tdbb*, Rsb*, rse_get_mode)
> (rse.cpp:478)
> ==2354== by 0x1C26B9CD: looper (exe.cpp:1959)
> ==2354== by 0x1C26DDB2: EXE_send (exe.cpp:1355)
> ==2354== by 0x1C180C26: jrd8_start_and_send (jrd.cpp:3626)
> ==2354== by 0x1C17610F: isc_start_and_send (why.cpp:4520)
> ==2354== by 0x1C298B56: METD_get_relation (metd.cpp:2359)
> ==2354== by 0x1C1D9565: PASS1_make_context (pass1.cpp:303)
> ==2354== by 0x1C1DB029: PASS1_statement (pass1.cpp:4010)
> ==2354== by 0x1C1BC741: prepare (dsql.cpp:4363)
> ==2354== by 0x1C1BE577: dsql8_prepare (dsql.cpp:1464)
> ==2354== by 0x1C179721: isc_dsql_prepare_m (why.cpp:3255)
> ==2354== by 0x1C1799DA: isc_dsql_prepare (why.cpp:3174)
> ==2354== by 0x1C15EBE1:
> ibpp_internals::StatementImpl::Prepare(std::string const&)
> (statement.cpp:102)
> ==2354== Address 0x1BC03974 is 5492 bytes inside a block of size 16384 alloc'd
> ==2354== at 0x1B904A80: malloc (vg_replace_malloc.c:131)
> ==2354== by 0x1C2B6C1C:
> Firebird::MemoryPool::external_alloc(unsigned) (alloc.cpp:114)
> ==2354== by 0x1C2B7DEB:
> Firebird::MemoryPool::internal_create(unsigned, int*, int*)
> (alloc.cpp:263)
> ==2354== by 0x1C23A235: JrdMemoryPool::createPool() (all.cpp:118)
> ==2354== by 0x1C253C3A: CMP_compile2(tdbb*, unsigned char*,
> unsigned short) (cmp.cpp:566)
> ==2354== by 0x1C183378: jrd8_compile_request (jrd.cpp:1700)
> ==2354== by 0x1C17CBC4: isc_compile_request (why.cpp:1157)
> ==2354== by 0x1C298B13: METD_get_relation (metd.cpp:2356)
> ==2354== by 0x1C1D9565: PASS1_make_context (pass1.cpp:303)
> ==2354== by 0x1C1DB029: PASS1_statement (pass1.cpp:4010)
> ==2354== by 0x1C1BC741: prepare (dsql.cpp:4363)
> ==2354== by 0x1C1BE577: dsql8_prepare (dsql.cpp:1464)
> ==2354== by 0x1C179721: isc_dsql_prepare_m (why.cpp:3255)
> ==2354== by 0x1C1799DA: isc_dsql_prepare (why.cpp:3174)
> ==2354== by 0x1C15EBE1:
> ibpp_internals::StatementImpl::Prepare(std::string const&)
> (statement.cpp:102)
> ==2354== by 0x1C091040:
> SimoObject::PrepareInsertAttrs(IBPP::Ptr<IBPP::IStatement>&,
> std::string&, std::string&) (SimoObject.cc:422)
> ==2354== by 0x1C068A5B: SimoPerson::Add() (Person.cc:334)
>