Bug 257431 – dev-db/oracle-instantclient-basic-10.2.0.3-r1: linking with libocci, a program crashes when releasing memory in std::vector functions

• Product: Gentoo Linux
• Status: RESOLVED TEST-REQUEST

[Description kunitoki (Lucio Asnaghi) 2009-02-02 21:12:24 UTC]

If you write a program and link with the libocci provided with the instantclient package (which is compiled with gcc 3.2 and linking with libstdc++.so.5) you will get into trouble with memory management of the c++ std:: objects (namely vector, list) cause of mixing with different libstdc++ libraries and gcc versions.

We should consider in replace the libocci.so with the one provided here (http://www.oracle.com/technology/tech/oci/occi/occidownloads.html) cause it will be compatible with 

Reproducible: Always

Steps to Reproduce:
1. Compile and run a simple occi program accessing some Metadata of the database.
Actual Results:  
Program is crashing upon deallocating std::vector returned from some occi functions.

Expected Results:  
It should free the objects correctly

Replacing libocci.* with this version makes the program run fine:

http://www.oracle.com/technology/tech/oci/occi/occidownloads.html

[Comment 1 kunitoki (Lucio Asnaghi) 2009-02-03 10:31:05 UTC]

Testing program:

int test(int argc, char **argv)
{
  const string userName = ".........";
  const string password = "....";
  const string connectString = "..";

  Environment *env = Environment::createEnvironment();
  {
    Connection *conn = env->createConnection(userName, password, connectString);
    Statement *stmt = conn->createStatement("SELECT * FROM TEST_TABLE");
    ResultSet *rs = stmt->executeQuery();

    vector<MetaData> md = rs->getColumnListMetaData();
    for (int i = 0; i < md.size(); i++)
      cout << "Column name: " << md[i].getString(MetaData::ATTR_NAME) << endl;

    stmt->closeResultSet(rs);
    conn->terminateStatement(stmt);
    env->terminateConnection(conn);
  }
  Environment::terminateEnvironment(env);

  return 0;
}


this produce:

Column name: ID
*** glibc detected *** double free or corruption (!prev): 0x08c52568 ***
Aborted


applying OCCI libraries compiled with gcc 3.4.5 (from the link) this runs as expected.

[Comment 2 Tobias Scherbaum (RETIRED) 2009-12-31 10:52:04 UTC]

Please try again w/ 11.2*. Please re-open if this still an issue then.